PRACH (Physical Random Access Channel) repeated sending method and device, terminal, network side equipment and medium

Abstract

The invention discloses a PRACH repeated sending method and device, a terminal, network side equipment and a medium, and belongs to the technical field of communication, and the PRACH repeated sending method comprises the steps that under the condition that the RSRP of at least one downlink reference signal measured by UE meets a target condition, the UE carries out repeated sending on resources in a target resource set corresponding to the first number of times on the resources in the target resource set corresponding to the first number of times, repeatedly sending the PRACH to the network side equipment by using at least two beams; wherein at least part of the beams in the at least two beams are different, the first number of times is the number of PRACH repeated transmission times corresponding to a target condition, and the target condition is used for ensuring that the signal transmission quality of the beam or the antenna panel indicated to the UE by the network side equipment is greater than or equal to a signal transmission quality threshold.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a PRACH repeated transmission method, device, terminal, network side equipment and medium. Background Art

[0002] During the random access process, the user equipment (UE) can repeatedly send the physical random access channel (PRACH) of different beams, and then the network side device can indicate a beam or an antenna panel to send a message (Msg) 3 to the UE based on the repeated transmission of the PRACH of different beams.

[0003] However, due to the influence of the signal-to-noise ratio and the number of PRACH repetitions, the signal transmission quality of the beam or antenna panel indicated by the network-side device to the UE may not be optimal, resulting in the UE performing meaningless PRACH repetitions of different beams. Summary of the invention

[0004] The embodiments of the present application provide a PRACH repeated transmission method, apparatus, terminal, network-side equipment and medium, which can solve the problem of meaningless PRACH repeated transmission of different beams by UE.

[0005] In a first aspect, a PRACH repeated transmission method is provided, which is executed by a UE, and the method includes: when a reference signal received power (RSRP) of at least one downlink reference signal measured by the UE meets a target condition, the UE repeatedly sends PRACH to a network side device on resources in a target resource set corresponding to a first number of times using at least two beams; wherein at least some of the at least two beams are different, and the first number is the number of PRACH repeated transmissions corresponding to the target condition, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to a signal transmission quality threshold.

[0006] In a second aspect, a PRACH repeated transmission method is provided, which is executed by a network side device, and the method includes: the network side device receives the PRACH repeatedly transmitted by the UE using at least two beams on the resources in the target resource set corresponding to the first number of times; wherein at least some of the at least two beams are different, and the first number of times is the number of PRACH repeated transmissions corresponding to the target condition satisfied by the RSRP of at least one downlink reference signal measured by the UE, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold.

[0007] According to a third aspect, a PRACH repeated transmission device is provided, which includes a transmission module; the transmission module is used to repeatedly send PRACH to a network side device using at least two beams on resources in a target resource set corresponding to a first number of times when the RSRP of at least one downlink reference signal measured by the UE meets a target condition; wherein at least some of the at least two beams are different, the first number is the number of PRACH repeated transmissions corresponding to the target condition, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to a signal transmission quality threshold.

[0008] In a fourth aspect, a PRACH repeated transmission device is provided, which includes a receiving module; the receiving module is used to receive PRACH repeatedly transmitted by a UE using at least two beams on resources in a target resource set corresponding to a first number of times; wherein at least some of the at least two beams are different, and the first number of times is the number of PRACH repeated transmissions corresponding to a target condition satisfied by the RSRP of at least one downlink reference signal measured by the UE, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to a signal transmission quality threshold.

[0009] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0010] In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is used to repeatedly send PRACH to a network side device using at least two beams on resources in a target resource set corresponding to a first number of times when the RSRP of at least one downlink reference signal measured by the terminal meets a target condition; wherein at least some of the at least two beams are different, and the first number is the number of PRACH repetitions corresponding to the target condition, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the terminal is greater than or equal to a signal transmission quality threshold.

[0011] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0012] In an eighth aspect, a network side device is provided, comprising a processor and a communication interface, wherein the communication interface is used to receive a PRACH repeatedly sent by a UE using at least two beams on resources in a target resource set corresponding to a first number of times; wherein at least some of the at least two beams are different, and the first number of times is the number of PRACH repetitions corresponding to a target condition satisfied by the RSRP of at least one downlink reference signal measured by the UE, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to a signal transmission quality threshold.

[0013] In a ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0014] In the tenth aspect, a wireless communication system is provided, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0015] In the eleventh aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect, or to implement the method described in the second aspect.

[0016] In the twelfth aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the PRACH repeated transmission method as described in the first aspect, or to implement the steps of the PRACH repeated transmission method as described in the second aspect.

[0017] In an embodiment of the present application, when the RSRP of at least one downlink reference signal measured by the UE meets the target condition, the UE can use at least two beams to repeatedly send PRACH to the network side device on the resources in the target resource set corresponding to the first number; wherein at least some of the at least two beams are different, the first number is the number of PRACH repetitions corresponding to the target condition, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold. Through this scheme, since the UE can use different beams to repeatedly send PRACH to the network side device on the resources corresponding to the number of PRACH repetitions corresponding to the target condition when the RSRP of at least one reference signal measured by the UE meets the target condition, and the target condition can be used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold, the UE can receive the beam or antenna panel with the best signal transmission quality indicated by the network side device after repeatedly sending PRACH of different beams, thereby avoiding the UE from performing meaningless repeated transmission of PRACH of different beams. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a block diagram of a wireless communication system to which the embodiments of the present application can be applied;

[0019] Figure 2 It is a schematic diagram of RO resource distribution at a certain moment in the related art;

[0020] Figure 3 It is a schematic diagram of multiple ROs at different positions in the time domain associated with the same SSB in the related art;

[0021] Figure 4 It is a schematic diagram of the corresponding relationship between the RSRP threshold and the number of PRACH repetitions in the related art;

[0022] Figure 5 It is one of the schematic diagrams of the relationship between the accuracy of optimal beam indication and SNR in the related art;

[0023] Figure 6 This is the second schematic diagram of the relationship between the accuracy of optimal beam indication and SNR in the related art;

[0024] Figure 7 This is a flowchart of a PRACH repeated transmission method provided by an embodiment of the present application;

[0025] Figure 8 This is one of the schematic diagrams of two RSRP threshold values ​​corresponding to each PRACH repetition transmission number in the embodiment of the present application;

[0026] Fig. 9 This is a second schematic diagram of two RSRP threshold values ​​corresponding to each PRACH repetition transmission number in an embodiment of the present application;

[0027] Fig.10 Schematic diagram of the RSRP threshold value corresponding to each PRACH repetition transmission number configured by the network in an embodiment of the present application;

[0028] Fig.11 is a flowchart of another PRACH repeated transmission method provided by an embodiment of the present application;

[0029] Fig.12 It is a structural diagram of a PRACH repeated transmission device provided in an embodiment of the present application;

[0030] Fig.13 It is a structural diagram of another PRACH repeated transmission device provided in an embodiment of the present application;

[0031] Fig.14 is a schematic diagram of a communication device provided in an embodiment of the present application;

[0032] Fig.15 is a schematic diagram of the hardware structure of the terminal provided in the embodiment of the present application;

[0033] Fig.16 It is a schematic diagram of the hardware structure of the network side device provided in the embodiment of the present application. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0035] The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0036] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

[0037] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6 th Generation, 6G) communication system.

[0038] Figure 1A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes UE11 and a network side device 12. Among them, UE11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle-mounted device (Vehicle User Equipment, VUE), a ship-mounted device, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted equipment can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of UE11 is not limited in the embodiment of the present application. The network side device 12 may include access network equipment or core network equipment, wherein the access network equipment may also be referred to as a radio access network (Radio Access Network, RAN) equipment, a radio access network function or a radio access network unit. The access network equipment may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AS) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station may be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a Relay Base Station (RBS), a Serving Base Station (SBS), a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Home Node B (HNB), a Home Evolved Node B (home evolved Node B), a Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0039] In combination with the accompanying drawings, a PRACH repeated transmission method, apparatus, terminal, network side equipment and medium provided in an embodiment of the present application are described in detail through some embodiments and their application scenarios.

[0040] Currently, the random access process includes a contention-based random access process and a non-contention-based random access process, wherein the contention-based random access process includes a contention-based 4-step random access process.

[0041] In the competitive 4-step random access process, the UE first sends Msg1 to the network, which includes the random access preamble (i.e., Preamble); then after detecting the Preamble, the network sends Msg2 / Random Access Response (RAR) message to the UE, and the Msg2 is scheduled by the downlink control information (DCI) scrambled by the random access radio network temporary identity (RA-RNTI). RA-RNTI is related to the physical random access channel transmission opportunity (PRACH Occasion, RO) resource used by the UE to send Msg1, and its calculation method is as follows:

[0042] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id

[0043] Where s_id is the index of the first orthogonal frequency division multiplexing (OFDM) symbol of the PRACH opportunity (0≤s_id<14); t_id is the index of the first time slot of the PRACH opportunity in the system frame (0≤t_id<80), and the subcarrier spacing for determining t_id is based on the μ value specified in Section 5.3.2 of TS 38.211[8]. For μ={0, 1, 2, 3} and μ={5, 6}, t_id is the index of the 120 kHz time slot containing the PRACH opportunity in the system frame (0≤t_id<80); f_id is the index of the PRACH opportunity in the frequency domain (0≤f_id<8); ul_carrier_id is the uplink (UL) carrier used for random access preamble transmission (0 for NUL carrier and 1 for SUL carrier).

[0044] The above Msg2 message contains the Random Access Channel Preamble Identity Document (RAPID) and the uplink radio resources allocated to the UE to send the Physical Uplink Shared Channel (PUSCH) of Msg3. The RAR grant field is shown in Table 1 below:

[0045] Table 1

[0046]

[0047]

[0048] After receiving the above Msg2, if the UE confirms that at least one of the numbers of the Preamble carried in the Msg2 is consistent with the number of the Preamble sent by itself, it will send Msg3 containing contention resolution information according to the resources indicated by the above RAR message; if the network does not receive the Msg3, it can schedule the retransmission of the Msg3 PUSCH in the physical downlink control channel (PDCCH) scrambled by the temporary cell radio network temporary identifier (Temporary Cell RNTI, TC-RNTI). After receiving the Msg3, the network will send Msg4 containing contention resolution information; after receiving the Msg4, the UE confirms that the contention resolution information contained is consistent with the one sent by itself in Msg3, that is, the 4-step random access is completed.

[0049] For the contention random access process, different UEs randomly select Preamble for transmission, so different UEs may select the same Preamble to send on the same time-frequency wireless resources. This situation can be understood as a UE Preamble conflict. In this case, different UEs will receive the same RAR. At this time, different UEs will transmit Msg3 PUSCH according to the scheduling information in the RAR ULgrant. The network can only decode the PUSCH (including contention resolution information) sent by one UE on one Msg3 PUSCH scheduling resource, so the network will include the contention resolution information received in Msg3 in Msg4. If the contention resolution information in Msg4 received by the UE matches the contention resolution information sent by the UE in Msg3 PUSCH, the UE considers that the contention resolution is successful; if it does not match, the contention resolution is considered unsuccessful. At this time, the UE will reselect resources and make the next random access attempt.

[0050] In NR, a cell can configure multiple frequency division multiplexing (FDM) ROs at a time domain location for transmitting PRACH. At a time, the number of FDM ROs can be: {1, 2, 4, 8}, which can be configured and determined by the high-level parameter msg1-FDM. For example, Figure 2 As shown in the figure, at one time, there are 8 RO resources distributed on different frequencies. The time domain position of the RO that can send the Preamble is determined by the PRACHConfigurationIndex configuration, and the frequency domain resource is determined by the msg1-FDM configuration. The frequency domain resource n_RA∈{0,1,…,M-1}, where M is equal to the high-level parameter msg1-FDM. The maximum number of Preamble sets on an RO is 64. For example, Figure 2 As shown, the RO resources are numbered RO#0 to RO#7 in order from low to high frequency.

[0051] In NR, there is an association between the RO and the synchronization signal block (SSB) actually sent. One SSB can be associated with multiple ROs, or multiple SSBs can be associated with one RO (in this case, different SSBs correspond to different Preamble subsets on the RO), which can be specifically configured by the network through the parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB.

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

[0053] For example, Figure 2 As shown, the number of ROs of FDM at a time is 8, the number of SSBs is 4, and each SSB is associated with 2 ROs. The UE can first select an SSB with an RSRP higher than the threshold based on the RSRP of the received beam / SSB; if the RSRP of multiple SSBs is higher than the threshold, the UE can select any SSB with an RSRP higher than the threshold; when there is no SSB with an RSRP higher than the threshold, the UE can select an SSB based on the implementation. If the UE determines to send PRACH / Msg1 / Preamble on the RO corresponding to SSB#0, the UE can select an RO from RO#0 and RO#1 and select a Preamble for transmission.

[0054] In the case of limited coverage, the UE needs to perform PRACH repetition to enhance the uplink coverage performance. For PRACH repetition, the UE needs to repeatedly send the Preamble on multiple ROs at different time domain positions associated with the same SSB. The number of PRACH repetitions can be {2, 4, 8}; among them, different numbers of repetitions represent different features (i.e., Features), and the PRACH resources corresponding to different Features are configured independently. The UE can first determine the number of PRACH repetitions according to the measured RSRP and the RSRP threshold configured by the network, and then select a set of ROs on the PRACH resources corresponding to the number of repetitions. The number of valid ROs in this set of ROs is equal to the number of PRACH repetitions. For example, as Figure 3 shown, assume that the UE selects SSB#1 and determines that the number of PRACH repetitions is 4. Then the UE needs to select 4 ROs corresponding to SSB#1 at different time domain positions on the PRACH resources corresponding to the Feature of the number of PRACH repetitions 4 to form a set of ROs (i.e., RO group) for the transmission of PRACH repetition.

[0055] In the current Rel-18, the PRACH repeated transmission is the same beam transmission associated with the same SSB. As Figure 3 shown, the UE repeatedly sends the PRACH on 4 ROs associated with SSB#1, and the same beam is used for each transmission. The network side configures an RSRP threshold for each configured number of PRACH repetitions. For the first RACH attempt, the UE determines the number of PRACH repetitions based on the measured RSRP and the RSRP threshold configured by the network. For example, as Figure 4 shown, the network-configured number of PRACH repetitions is {2, 4, 8}, and the corresponding RSRP thresholds are {threshold value 1, threshold value 2, threshold value 3}; if threshold value 3 < RSRP < threshold value 2, the UE can determine that the number of PRACH repetitions is 4; if the RSRP measured by the UE < threshold value 3, the UE can determine that the number of PRACH repetitions is 8.

[0056] Considering the uplink coverage performance of Msg3, repeated transmission of PRACH in different beams may be introduced in Rel-19 in the future to further perform beam alignment (i.e., Beam refinement). The UE can use different beams to repeatedly transmit PRACH. The network side detects each PRACH transmission and determines an optimal beam or an optimal PRACH transmission or an optimal PRACH transmission group, and then indicates the determined optimal beam or optimal PRACH transmission or optimal PRACH transmission group to the UE in Msg2 / RAR. The UE can then send Msg3 using the beam indicated by the network side, or the beam used by the indicated PRACH. Alternatively, the UE has multiple antenna panels (i.e., Panels), and the UE uses each Panel in turn to repeatedly transmit PRACH. The network side detects each PRACH transmission, determines a beam, PRACH, or Panel, and then indicates it to the UE. The UE can then select the Panel indicated by the network or the Panel corresponding to the indicated PRACH or beam as the Panel for subsequent communications.

[0057] Therefore, whether the optimal beam or optimal PRACH transmission or optimal PRACH transmission group indicated by the network side in Msg2 / RAR is accurate directly affects the uplink coverage performance of Msg3 and is related to whether it is necessary to use different beams for PRACH repeated transmission. Regarding the indication of beam / PRACH transmission / PRACH transmission group, some companies have mentioned that the network side indicates it through the RA-RNTI associated with the RO corresponding to the transmitted PRACH, that is, the network side uses the DCI scrambled by the RA-RNTI corresponding to the RO where the selected PRACH is located to schedule Msg-2.

[0058] The main purpose of PRACH repetition in different beams is to enhance the uplink coverage of Msg-3 through beam refinement. Therefore, when the UE determines whether to repeat PRACH in different beams and the number of repetitions, it needs to consider the impact of the Msg2 / RAR beam indication accuracy.

[0059] Through research, it is found that for the same number of PRACH repetitions (i.e. the same number of beams), the accuracy of the network side indicating the UE's optimal beam / optimal PRACH increases with the increase of the signal to noise ratio (SNR) or RSRP. For different PRACH repetitions (i.e. different numbers of beams), within the RSRP range that meets the PRACH uplink coverage requirements, the accuracy of the optimal beam / optimal PRACH indication is different. For example, Figure 5As shown in FIG. 1 , the optimal beam / optimal PRACH indication accuracy of PRACH repetition times 2 / 4 / 8 is different within the RSRP range that meets the respective coverage requirements. Under the same optimal beam indication accuracy, the SNR required for different PRACH repetition times is also different. For example, Figure 6 As shown, when the accuracy of optimal beam indication is 90%, the SNR required for PRACH repetition times 2 / 4 / 8 is -7 / -6.3 / 0 dB respectively.

[0060] According to the current Rel-18 method, in the scenario of limited PRACH uplink coverage, the UE determines whether to repeat PRACH transmission and the specific number of PRACH repetitions based on the measured RSRP and the RSRP threshold corresponding to the configured PRACH repetition number. When the SNR is -9dB, if compared according to the threshold, the UE should choose to send a different beam with a PRACH repetition number of 8, but the accuracy of the optimal beam indication is about 74% at this time. If the optimal beam indication is inaccurate, the meaning of PRACH repetition in different beams is lost. In other words, the UE is only allowed to repeat PRACH transmission in different beams within the RSRP range where the accuracy of the optimal beam indication meets the requirements.

[0061] In order to solve the above problems, in the PRACH repeated transmission method provided in an embodiment of the present application, when the RSRP of at least one downlink reference signal measured by the UE meets the target condition, the UE can use at least two beams to repeatedly send PRACH to the network side device on the resources in the target resource set corresponding to the first number; wherein at least some of the at least two beams are different, and the first number is the number of PRACH repeated transmissions corresponding to the target condition, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold. Through this solution, since the UE can repeatedly send PRACH to the network side device using different beams on the resources corresponding to the number of PRACH repetitions corresponding to the target condition when the RSRP of at least one reference signal measured meets the target condition, and the target condition can be used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold, the UE can receive the beam or antenna panel with the best signal transmission quality indicated by the network side device after repeatedly sending PRACH in different beams, thereby avoiding the UE from meaninglessly sending PRACH in different beams.

[0062] The present application provides a PRACH repeated transmission method. Figure 7 FIG. 4 is a flowchart of a PRACH repetitive transmission method provided in an embodiment of the present application. Figure 7As shown, the PRACH repeated transmission method provided in the embodiment of the present application may include the following step 701.

[0063] It should be noted that the beam involved in the embodiments of the present application can also be represented as a PRACH transmission in a PRACH repetition; the beam group involved in the embodiments of the present application can also be represented as a group of PRACH transmissions in a PRACH repetition.

[0064] Step 701: When the RSRP of at least one downlink reference signal measured by the UE meets the target condition, the UE repeatedly sends PRACH to the network side device using at least two beams on the resources in the target resource set corresponding to the first number of times.

[0065] Among them, at least some of the at least two beams are different, the first number is the number of PRACH repetitions corresponding to the target condition, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold.

[0066] Optionally, in an embodiment of the present application, the above-mentioned signal transmission quality threshold may be preconfigured, predefined, or agreed upon by a protocol, etc.

[0067] Optionally, in the embodiment of the present application, a signal transmission quality greater than or equal to the above-mentioned signal transmission quality threshold may be an optimal signal transmission quality.

[0068] Optionally, in an embodiment of the present application, resource sets corresponding to different PRACH repetition transmission times may be different.

[0069] For example, Figure 8 As shown, each number of PRACH repetitions corresponds to two RSRP threshold values ​​(i.e., threshold value 1 and threshold value 2); wherein, threshold value 1 is related to the uplink coverage performance of PRACH repeated transmissions in different beams, and threshold value 2 is related to the beam / beam group indication accuracy and the number of PRACH repetitions; for each number of PRACH repetitions, the beam / beam group indication accuracy requirement may be different, and the corresponding threshold value 2 may be configured independently; it can be seen that threshold value 2 for repetition number 2> threshold value 2 for repetition number 4> threshold value 2 for repetition number 8.

[0070] Optionally, in the embodiment of the present application, the RSRP of the at least one downlink reference signal satisfies the target condition, which may include at least one of the following 1.1 to 1.6:

[0071] 1.1. The RSRP of a downlink reference signal is greater than or equal to the first RSRP threshold value;

[0072] 1.2. The first RSRP is greater than or equal to the second RSRP threshold value, and the first RSRP is an RSRP determined by the UE based on the RSRP of the at least one downlink reference signal;

[0073] 1.3. The number of first downlink reference signals is greater than or equal to a first number threshold value, and the first downlink reference signal is a different downlink reference signal whose RSRP is greater than or equal to a third RSRP threshold value among the at least one downlink reference signal;

[0074] 1.4. The number of second downlink reference signals is less than or equal to a second number threshold value, and the second downlink reference signal is a different downlink reference signal whose RSRP is less than or equal to a fourth RSRP threshold value among the at least one downlink reference signal;

[0075] 1.5. The difference between the RSRPs of different downlink reference signals in the at least one downlink reference signal is less than or equal to a fifth RSRP threshold value;

[0076] 1.6. The RSRP of the target SSB is greater than or equal to a sixth RSRP threshold value, and the target SSB is an SSB selected by the UE based on the RSRP of the at least one downlink reference signal.

[0077] Optionally, in an embodiment of the present application, the one downlink reference signal may be a reference signal for path loss estimation.

[0078] Optionally, in an embodiment of the present application, the first RSRP may be an average RSRP measured based on the RSRP of the at least one downlink reference signal (eg, SSB), or may be a maximum RSRP among the RSRPs of the at least one downlink reference signal.

[0079] Optionally, in an embodiment of the present application, different downlink reference signals in the above-mentioned at least one downlink reference signal may be: different SSBs in at least one SSB; for example, the at least one downlink reference signal is M SSBs, and when the maximum RSRP difference between N (0≤N≤M) different SSBs does not exceed the fifth RSRP threshold value shown in the configuration or determined according to a predefined rule, the UE is allowed to select the corresponding resources for repeated PRACH transmission of different beams.

[0080] Optionally, in the embodiments of the present application, the above first RSRP threshold or the above second RSRP threshold may be the highest threshold selected for the same beam PRACH repeated transmission resources corresponding to the above first number, and at the same time may be the lowest threshold selected for different beam PRACH repeated transmission resources corresponding to the above first number; that is to say, the highest threshold selected for the same beam PRACH repeated transmission resources corresponding to the above first number is the lowest threshold selected for different beam PRACH repeated transmission resources corresponding to the above first number; in this way, the number of threshold configurations can be reduced.

[0081] Exemplarily, as Figure 8 shown, each threshold 1 is used to determine the PRACH repeated transmission times, and each threshold 2 is used to determine the repeated transmission of PRACH using different beams; for the PRACH repeated transmission times 2, the threshold 2 of the PRACH repeated transmission times 2 is the upper limit of the resource selection for the same beam 2 - time PRACH repetition, and at the same time is also the lower limit of the resource selection for different beam 2 - time PRACH repetition. That is, when the RSRP measured by the UE satisfies: the threshold 1 of the PRACH repeated transmission times 4 < RSRP < the threshold 2 of the PRACH repeated transmission times 2, the UE can select the resources corresponding to the same beam 2 - time PRACH repetition for transmission, and only at this time can the uplink coverage requirement of the PRACH be met; when the RSRP measured by the UE satisfies: the threshold 2 of the PRACH repeated transmission times 2 < RSRP < the threshold 1 of the PRACH repeated transmission times 2, the UE can select the resources corresponding to the different beam 2 - time PRACH repetition for transmission.

[0082] Optionally, in the embodiments of the present application, the downlink reference signal in the above at least one downlink reference signal may be an SSB.

[0083] Optionally, in the embodiments of the present application, the RSRP of each downlink reference signal in the above first downlink reference signal is greater than or equal to the above third RSRP threshold, and every two downlink reference signals in the first downlink reference signal are different from each other.

[0084] Optionally, in the embodiments of the present application, the RSRP of each downlink reference signal in the above second downlink reference signal is less than or equal to the above fourth RSRP threshold, and every two downlink reference signals in the second downlink reference signal are different from each other.

[0085] Optionally, in the embodiments of the present application, the above target SSB may be an SSB selected by the UE after determining the PRACH repeated transmission times based on the RSRP of the above at least one downlink reference signal.

[0086] Optionally, in an embodiment of the present application, the above-mentioned threshold values ​​may be configured by a network-side device, or may be determined according to predefined rules.

[0087] Optionally, in an embodiment of the present application, different numbers of PRACH repetitions may correspond to different conditions for ensuring that the signal transmission quality is greater than or equal to the signal transmission quality threshold; each threshold value in the conditions corresponding to different numbers of PRACH repetitions may be independently configured.

[0088] In an embodiment of the present application, since the RSRP of the at least one downlink reference signal satisfies the target conditions and may include at least one of 1.1 to 1.6, the UE can use the at least two beams to repeatedly send PRACH to the network side device on the resources in the target resource set when any of the conditions 1.1 to 1.6 are met, thereby improving the flexibility of the UE to repeatedly send PRACH using different beams.

[0089] Optionally, in an embodiment of the present application, the above-mentioned target resource set may include at least one RO group, and each RO group includes at least two ROs associated with the same SSB.

[0090] Among them, ROs located in different frames and having the same time-frequency position are not in the same RO group.

[0091] Optionally, in an embodiment of the present application, the time-frequency position may be any one of the following: a time slot, a symbol, or a frequency domain RO position.

[0092] For example, if RO#1 is located in the 1st system frame and RO#2 is in the 2nd system frame, and RO#1 and RO#2 have the same time slot and symbol positions in the 1st system frame and the 2nd system frame respectively, and the frequency domain positions of RO#1 and RO#2 are the same, then RO#1 and RO#2 cannot be determined to be in one RO group.

[0093] Optionally, in an embodiment of the present application, when determining the RO group for repeated transmission of PRACH in different beams, the UE can use the RO frequency hopping method to ensure that any two ROs in the RO group are not located at the same time-frequency position in different frames (at least one parameter of the time domain position t_id / s_id and the frequency domain position f_id is different, thereby ensuring that the RA-RNTI calculation results are different).

[0094] Optionally, in an embodiment of the present application, the network side device may instruct the UE to use the beam corresponding to the mth RO through the DCI scrambled by the RA-RNTI corresponding to the mth RO in the RO group.

[0095] In the embodiment of the present application, since the ROs in the above-mentioned target resource set that are located in different frames and have the same time-frequency position are not in the same RO group, it can be ensured that the RA-RNTIs corresponding to different ROs within / between RO groups are different, which facilitates subsequent beam indication.

[0096] Optionally, in the embodiment of the present application, the above step 701 can be specifically implemented by the following step 701a.

[0097] Step 701a: When the RSRP of at least one downlink reference signal meets the target condition, the UE repeatedly sends the first number of PRACHs to the network side device on the resources in the target resource set using at least two beams with the same number as the first number.

[0098] For example, assuming that the first number mentioned above is 8, then the number of beams of the at least two beams mentioned above is also 8, and any two of the 8 beams are different. The UE can use the 8 beams, send each beam once, and perform a total of 8 PRACH transmissions.

[0099] In an embodiment of the present application, since the UE can use the at least two beams with the same number as the first number corresponding to the above-mentioned target condition that is met on the resources in the target resource set to repeatedly send the first number of PRACHs to the network side device, different uplink coverage requirements can be met by repetition of PRACHs in different beams.

[0100] In the PRACH repeated transmission method provided in an embodiment of the present application, since the UE can repeatedly transmit PRACH to the network side device using different beams on the resources corresponding to the number of PRACH repeated transmissions corresponding to the target condition when the RSRP of at least one reference signal measured by the UE meets the target condition, and the target condition can be used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold, so that the UE can receive the beam or antenna panel with the best signal transmission quality indicated by the network side device after repeatedly transmitting PRACH of different beams, thereby avoiding the UE from performing meaningless repeated transmission of PRACH of different beams.

[0101] Optionally, the PRACH repeated transmission method provided in the embodiment of the present application may further include the following step 702.

[0102] Step 702: When the RSRP of at least one downlink reference signal does not meet the target condition and is greater than or equal to at least one threshold value corresponding to the second number, the UE repeatedly sends the PRACH of the first number to the network side device on the resources in the target resource set using at least two beams with the same number as the second number.

[0103] The second number is the number of PRACH repetition transmissions that is different from the first number.

[0104] In the embodiment of the present application, at least one threshold value corresponding to the above-mentioned second number, that is, the threshold value corresponding to the second number in the condition for ensuring that the above-mentioned signal transmission quality is greater than or equal to the above-mentioned signal transmission quality threshold.

[0105] For example, Fig. 9 As shown, each threshold value 1 is used to determine the number of PRACH repetitions, and each threshold value 2 is used to determine the use of different beams to repeat PRACH; the UE determines that the number of PRACH repetitions is 8 based on the measured RSRP and the threshold value 1 corresponding to the number of PRACH repetitions of 8, that is, PRACH needs to be repeated 8 times to meet the coverage requirement, but the RSRP does not meet the threshold value 2 requirement corresponding to the number of PRACH repetitions of 8 (that is, it does not meet the beam indication accuracy requirement), but meets the threshold value 2 requirement corresponding to the number of PRACH repetitions of 4, then the UE can select the resource set corresponding to the number of PRACH repetitions of 8 with different beams, use 4 different beams, repeat each beam 2 times, and send 8 PRACH in total.

[0106] In an embodiment of the present application, since the RSRP of at least one downlink reference signal shown does not meet the target condition shown and is greater than or equal to at least one threshold value corresponding to a second number different from the first number, the UE can use at least two beams with the same number as the second number to repeatedly send the PRACH of the first number to the network side device on the resources in the target resource set shown. Therefore, the conditions for repeatedly sending PRACH using different beams can be relaxed. When the above-mentioned target condition is not met, different beams with the same number as the second number can still be used for transmission, so as to meet different uplink coverage requirements as much as possible.

[0107] Optionally, in an embodiment of the present application, before the above step 701, the PRACH repeated transmission method provided in the embodiment of the present application may further include the following steps 703 and 704.

[0108] Step 703: The UE measures the RSRP of at least one downlink reference signal, and determines a second RSRP according to the RSRP of the at least one downlink reference signal.

[0109] Optionally, in the embodiment of the present application, the second RSRP may be an average RSRP measured based on the RSRP of the at least one downlink reference signal, or may be a maximum RSRP among the RSRPs of the at least one downlink reference signal.

[0110] Step 704: When the second RSRP belongs to the RSRP interval corresponding to the first number and the UE supports repeated transmission of the first number of PRACH, the UE determines the first number as the number of times the PRACH is repeatedly sent to the network side device using at least two beams.

[0111] Optionally, in an embodiment of the present application, the network side device may preset an RSRP interval corresponding to each number of PRACH repetition transmissions.

[0112] For example, Figure 8 As shown, each threshold value 1 is used to determine the number of times PRACH is repeatedly sent, and each threshold value 2 is used to determine the use of different beams to repeatedly send PRACH; if the above-mentioned second RSRP satisfies: threshold value 1 of repetition number 4<second RSRP<threshold value 1 of repetition number 2, that is, the second RSRP belongs to the RSRP interval corresponding to the PRACH repetition number 2 (threshold value 1 of repetition number 4, threshold value 1 of repetition number 2), then the UE can determine that the PRACH repetition number is 2 times (that is, PRACH repeated transmission 2 times in different beams can meet the uplink coverage requirements of PRACH); if the second RSRP>threshold value 2 of repetition number 2, it means that the beam indication accuracy can meet the requirements, then the UE can select the resource sets corresponding to different beam repetition numbers 2 to repeatedly send PRACH in different beams, otherwise the UE can select the resource set corresponding to the same beam repetition number 2 for transmission.

[0113] In an embodiment of the present application, since the UE can first determine the number of PRACH repetitions based on the measured RSRP of the at least one downlink reference signal, and then compare the RSRP of the at least one downlink reference signal with the condition corresponding to the number of PRACH repetitions, the process of determining whether to use different beams to repeatedly send PRACH can be simplified.

[0114] Optionally, in an embodiment of the present application, the UE may determine the number of PRACH repetitions for different beams based on a threshold value related to the beam (group) indication accuracy configured by the network or determined according to predefined rules, the measured RSRP and its own capabilities.

[0115] For example, Fig.10As shown, the predefined repetition times of a network configuration (such as SIB1) are {N1, N2, N3}, and the RSRP threshold values related to the beam / beam group indication accuracy are {threshold value 1, threshold value 2, threshold value 3} respectively; if the RSRP measured by the UE satisfies: threshold value 2 < RSRP < threshold value 1, and the UE supports sending with 2 / 4 / 8 different beams, then the UE can select the resource set corresponding to the PRACH repetition times of 4 for different beams to send; if the RSRP measured by the UE satisfies: threshold value 2 < RSRP < threshold value 1, but the UE's capability only supports sending with 2 different beams, then the UE can not perform PRACH repetition transmission for different beams, or can perform 2 separate transmissions for 2 different beams based on its own implementation; if the RSRP measured by the UE satisfies: threshold value 2 < RSRP < threshold value 1, but the UE's capability only supports sending with 8 different beams, then the UE can not perform PRACH repetition transmission for different beams, or can perform PRACH transmission by selecting 4 beams from 8 different beams based on the UE's implementation.

[0116] Optionally, in the embodiments of the present application, during the initial access process, the PRACH repetition transmission quantity for different beams is a fixed value N0, where the value of N0 can be predefined by the protocol (for example, fixed as 2 or 4 or 8 or other integers greater than 1), or configured explicitly by the system message, or the repetition times of the same-beam PRACH repetition transmission in Rel-18 are multiplexed according to implicit rules (for example, if the PRACH repetition transmission times configured for the PRACH repetition transmission in Rel-18 are N1, N2, N3, then the quantity of the different-beam PRACH repetition transmission in Rel-19 is the minimum or maximum value among {N1, N2, N3}).

[0117] Optionally, in the embodiments of the present application, the UE determines the trigger threshold Thr0 for the different-beam PRACH repetition transmission process. This trigger threshold Thr0 can be configured explicitly by the system message, or other threshold values are multiplexed (for example, the threshold value corresponding to the same-beam repetition transmission of N0 times in Rel-18 PRACH is multiplexed, where N0 corresponds to the minimum or maximum value among {N1, N2, N3}, corresponding to the N0 determined by the above implicit rules; or the threshold value associated with the SSB selection in the 4-step random access process in Rel-15 is multiplexed; or the trigger threshold in the 2-step random access process in Rel-16 is multiplexed, etc., other threshold values that may be configured in Rel-15, 16, 17, 18).

[0118] Optionally, in an embodiment of the present application, the trigger condition for the UE to trigger the different beam PRACH repeated transmission process is: when the downlink measurement reference RSRP measured by the UE is higher than the trigger threshold Thr0, the UE uses N0 different beam PRACH repeated transmissions; otherwise, the same beam PRACH is used for repeated transmission, and the number of repetitions is determined according to the rules of the Rel-18 same beam PRACH repeated transmission process.

[0119] Optionally, in an embodiment of the present application, after the above step 701, the PRACH repeated transmission method provided in the embodiment of the present application may further include the following steps 705 and 706.

[0120] Step 705: The UE receives uplink transmission indication information sent by the network side device.

[0121] The uplink transmission indication information is used to indicate at least one of the following: a beam, a wave array, a PRACH transmission in PRACH repeated transmissions, a group of PRACH transmissions in PRACH repeated transmissions, and an antenna panel.

[0122] Optionally, in an embodiment of the present application, the above-mentioned one beam / one antenna panel can be a beam / one antenna panel selected by the network side device based on the reception quality of PRACH; for example, the UE has a total of 2 antenna panels, the PRACH repetition number is 4, and the 2 antenna panels send PRACH twice in sequence. Then the network side instructs the UE to select the second antenna panel corresponding to the third PRACH transmission / the third beam, then the UE can select the second antenna panel for subsequent uplink transmission.

[0123] Step 706: The UE determines, according to the uplink transmission indication information, the object indicated by the uplink transmission indication information as the object used for uplink transmission.

[0124] For example, if the uplink transmission indication information is used to indicate the one beam, the UE may determine the one beam as the beam used for uplink transmission; if the uplink transmission indication information is used to indicate the one antenna panel, the UE may determine the one antenna panel as the antenna panel used for uplink transmission.

[0125] In an embodiment of the present application, since the UE can determine the object indicated by the uplink transmission indication information as the object used for uplink transmission based on the received uplink transmission indication information, it is convenient for the UE to use the optimal beam or antenna panel indicated by the network side device for subsequent uplink transmission.

[0126] Optionally, in the embodiment of the present application, the uplink transmission indication information may include at least one of the following 2.1 to 2.6:

[0127] 2.1、RAPID carried in Msg2;

[0128] 2.2, RA-RNTI;

[0129] 2.3, RA-RNTI and target time unit information, where the target time unit information is related to the PRACH transmission indicated by the uplink transmission indication information;

[0130] 2.4. Reserved bits in DCI;

[0131] 2.5, at least some bits of a field in RAR;

[0132] 2.6. At least some bits of multiple fields in RAR.

[0133] Optionally, in an embodiment of the present application, the above-mentioned target time unit information may be carried in DCI.

[0134] Optionally, in an embodiment of the present application, if the uplink transmission indication information includes the above 2.1, the UE may use different beams to perform repeated PRACH transmission, and different PRACH transmissions use different Preambles.

[0135] For example, the UE uses 8 different beams to repeatedly send uplink PRACH. The Preambles used by each PRACH are {Preamble-1, Preamble-2…, Preamble-8}. If the UE detects the sequence number ID corresponding to Preamble-6 in the RAR message, it can use the uplink beam corresponding to Preamble-6 to send the next Msg3 uplink.

[0136] For another example, the UE uses 4 different beams to perform 8 uplink PRACH repetitions. The Preamble ID used for every two PRACH repetitions is the same, that is, every two PRACH repetitions are a group and use the same beam. The Preambles corresponding to the 8 different uplink transmissions are {Preamble-1, Preamble-1, Preamble-2, Preamble-2, Preamble-3, Preamble-3, Preamble-4, Preamble-4}. The UE detects the ID corresponding to Preamble-2 in the RAR message, and uses the transmission beam of the PRACH group corresponding to Preamble-2 (using the same beam) to perform the next Msg3 uplink transmission.

[0137] For another example, the UE uses 8 different beams to repeatedly transmit uplink PRACH, and the Preamble ID used for every two PRACH repeated transmissions is the same, that is, every two beams form a beam group. The Preambles corresponding to the 8 different uplink transmissions are {Preamble-1, Preamble-1, Preamble-2, Preamble-2, Preamble-3, Preamble-3, Preamble-4, Preamble-4}. The UE detects Preamble-2 in the RAR message, and selects (for example, based on UE implementation) 1 beam from the beam group (including 2 beams) corresponding to Preamble-2 for the next uplink transmission of Msg3.

[0138] Exemplarily, if the above-mentioned uplink transmission indication information includes the above-mentioned 2.5 or 2.6, the UE can use 1 bit of CSIrequest to indicate one of 2 types of PRACH / PRACH groups / PRACH beams / PRACH beam groups; for example, 1 or 2 bits of TPC can be additionally used, combined with 1 bit of CSI request to indicate one of 4 or 8 types of PRACH / PRACH groups / PRACH beams / PRACH beam groups.

[0139] In the embodiment of the present application, since the above-mentioned uplink transmission indication information may include at least one of the above-mentioned 2.1 to 2.6, the UE can be indicated the object used for uplink transmission through different uplink transmission indication information, thereby improving the flexibility of indicating uplink transmission resources to the UE.

[0140] Optionally, in the embodiment of the present application, the target time unit information may be used to indicate at least one of the following 3.1 to 3.4:

[0141] 3.1. The system frame number in which a PRACH is sent;

[0142] 3.2, a set of system frame numbers where PRACH is sent;

[0143] 3.3. Function value of the system frame number in which a PRACH is sent;

[0144] 3.4. A function value of the system frame number in which a group of PRACH is sent.

[0145] For example, the function value of the system frame number may be SFN mod (K / 10), where K is the maximum window determined by the RO group, and the unit is ms.

[0146] In the embodiment of the present application, since the above-mentioned target time unit information can be used to indicate at least one of the above-mentioned 3.1 to 3.4, the content of the above-mentioned uplink transmission indication information can be further enriched, thereby further improving the flexibility of indicating uplink transmission resources to the UE.

[0147] Optionally, in an embodiment of the present application, the uplink transmission indication information includes the RA-RNTI.

[0148] The target resource set satisfies at least one of the following 4.1 and 4.2:

[0149] 4.1. The RA-RNTIs corresponding to different ROs in any RO group in the target resource set are different, and the RA-RNTI corresponding to the RO in any RO group is different from the RA-RNTI corresponding to the RO not in the RO group in the same system frame;

[0150] 4.2. The RA-RNTIs corresponding to different ROs between any two RO groups in the above target resource set are different, and the RA-RNTI corresponding to the RO in any RO group in the target resource set is different from the RA-RNTI corresponding to the RO not in the RO group in the same system frame.

[0151] Optionally, in an embodiment of the present application, a method for calculating the RA-RNTI corresponding to the ROs where different beams are located is as follows:

[0152] For all ROs within a RO group / between RO groups, or only for ROs within a RO group / between RO groups that are located at the same time-frequency position in different frames:

[0153] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+Offset_m;

[0154] Among them, the value of the offset value Offset_m can ensure that the RA-RNTI of different ROs within the RO group / between RO groups is different, and ensure that the RA-RNTI of the RO that is not in the RO group in the same system frame is different. For the specific description of other parameters, please refer to the relevant description in the above-mentioned related technology. In order to avoid repetition, it will not be repeated here.

[0155] Optionally, in an embodiment of the present application, for RO groups, the network side device and the UE can ensure that the RA-RNTIs corresponding to different ROs are different according to predefined rules.

[0156] For example, for RO groups with overlapping RAR windows (for example, the RAR windows corresponding to RO group#1 and RO group#2 overlap in time), the network-side device and the UE follow predefined rules such as the above-mentioned RA-RNTI calculation method to make the RA-RNTIs corresponding to the ROs between the two RO groups different.

[0157] In an embodiment of the present application, since when the above-mentioned uplink transmission indication information includes the above-mentioned RA-RNTI, the above-mentioned target resource set needs to satisfy at least one of the above-mentioned 4.1 and 4.2, it can further ensure that the RA-RNTIs corresponding to different ROs within / between RO groups are different, so as to facilitate subsequent beam indication.

[0158] Optionally, in the embodiment of the present application, the uplink transmission indication information may be sent by the network side device through high-layer signaling. Exemplarily, the step 706 may be implemented through the following step 706a.

[0159] Step 706a: The UE sends the uplink transmission indication information to the physical layer through the Medium Access Control (MAC) layer, and the physical layer determines the object indicated by the uplink transmission indication information as the object used for uplink transmission.

[0160] Optionally, in an embodiment of the present application, the above-mentioned high-layer signaling may be RAR or MAC CE, etc.

[0161] In an embodiment of the present application, since when the above-mentioned uplink transmission indication information is sent through high-layer signaling, the UE can indicate the uplink transmission indication information to the physical layer through the MAC layer, and determine the indicated object as the object used for uplink transmission through the physical layer, the resource information indicated by the network side device can be used for subsequent uplink transmission.

[0162] Optionally, in an embodiment of the present application, if the above-mentioned uplink transmission indication information is used to indicate an antenna panel, the UE may use the indicated antenna panel as the antenna panel for subsequent communications.

[0163] Optionally, in an embodiment of the present application, in a non-competitive random access scenario, the network side device may instruct the UE to perform repeated PRACH transmissions of different beams through RRC signaling or DCI to perform beam alignment.

[0164] For example, when switching cells, the network-side device can instruct the UE through RRC signaling or DCI that it can perform PRACH repeated transmission with different beam PRACH repetition times of {N1, N2, …}, and configure the corresponding PRACH resource set; when the RSRP measured by the UE meets the corresponding threshold value, the UE can select resources in the corresponding resource set to repeatedly send PRACH in different beams.

[0165] For another example, the network side device can directly instruct the UE to perform PRACH repeated transmission with different beam repetition times N through RRC signaling or DCI, and the UE selects resources in the corresponding resource set for transmission.

[0166] This embodiment of the present application provides another PRACH repeated transmission method. Fig.11 FIG. 4 is a flowchart of a PRACH repetitive transmission method provided in an embodiment of the present application. Fig.11 As shown, the PRACH repeated transmission method provided in the embodiment of the present application may include the following step 111.

[0167] Step 111: The network-side device receives the PRACH repeatedly sent by the UE using at least two beams on the resources in the target resource set corresponding to the first number of times.

[0168] Among them, at least some of the at least two beams mentioned above are different, and the above-mentioned first number is the number of PRACH repetitions corresponding to the target condition satisfied by the RSRP of at least one downlink reference signal measured by the UE, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold.

[0169] Optionally, in the embodiment of the present application, the RSRP of the at least one downlink reference signal satisfies the target condition, which may include at least one of the following:

[0170] The RSRP of a downlink reference signal is greater than or equal to a first RSRP threshold value;

[0171] The first RSRP is greater than or equal to the second RSRP threshold value, and the first RSRP is an RSRP determined by the UE based on the RSRP of the at least one downlink reference signal;

[0172] The number of first downlink reference signals is greater than or equal to a first number threshold value, and the first downlink reference signal is a different downlink reference signal whose RSRP is greater than or equal to a third RSRP threshold value among the at least one downlink reference signal;

[0173] The number of second downlink reference signals is less than or equal to a second number threshold value, and the second downlink reference signal is a different downlink reference signal whose RSRP is less than or equal to a fourth RSRP threshold value among the at least one downlink reference signal;

[0174] A difference between RSRPs of different downlink reference signals in the at least one downlink reference signal is less than or equal to a fifth RSRP threshold value;

[0175] The RSRP of the target SSB is greater than or equal to a sixth RSRP threshold value, and the target SSB is an SSB selected by the UE based on the RSRP of the at least one downlink reference signal.

[0176] Optionally, in an embodiment of the present application, the above-mentioned target resource set may include at least one RO group, and each RO group includes at least two ROs associated with the same SSB.

[0177] Among them, ROs located in different frames and having the same time-frequency position are not in the same RO group.

[0178] In the PRACH repeated transmission method provided in an embodiment of the present application, since the network side device can receive the PRACH repeatedly transmitted by the UE using different beams on the resources corresponding to the number of PRACH repeated transmissions corresponding to the target condition satisfied by the RSRP of at least one downlink reference signal measured by the UE, and the target condition can be used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold, the beam or antenna panel with the best signal transmission quality can be indicated to the UE based on the PRACH repeatedly transmitted by the UE using different beams, thereby avoiding the UE from performing meaningless repeated transmission of PRACH in different beams.

[0179] Optionally, in an embodiment of the present application, after the above step 111, the PRACH repeated transmission method provided in the embodiment of the present application may further include the following step 112.

[0180] Step 112: The network side device sends uplink transmission indication information to the UE.

[0181] The uplink transmission indication information is used to indicate at least one of the following: a beam, a wave array, a PRACH transmission in PRACH repeated transmissions, a group of PRACH transmissions in PRACH repeated transmissions, and an antenna panel.

[0182] Optionally, in the embodiment of the present application, the uplink transmission indication information may include at least one of the following:

[0183] RAPID carried in Msg2;

[0184] RA-RNTI;

[0185] RA-RNTI and target time unit information, where the target time unit information is related to the PRACH transmission indicated by the uplink transmission indication information;

[0186] Reserved bits in DCI;

[0187] at least some of the bits of a field in the RAR;

[0188] At least some of the bits of multiple fields in the RAR.

[0189] Optionally, in the embodiment of the present application, the target time unit information may be used to indicate at least one of the following:

[0190] The system frame number in which a PRACH is sent;

[0191] A set of system frame numbers in which PRACH is sent;

[0192] The function value of the system frame number in which a PRACH is sent;

[0193] A function value of the system frame number in which a group of PRACH transmissions are located.

[0194] Optionally, in an embodiment of the present application, the uplink transmission indication information includes the RA-RNTI.

[0195] The target resource set satisfies at least one of the following:

[0196] Different ROs in any RO group in the target resource set have different RA-RNTIs, and the RA-RNTI corresponding to the RO in any RO group is different from the RA-RNTI corresponding to the RO not in the RO group in the same system frame;

[0197] The RA-RNTIs corresponding to different ROs between any two RO groups in the above target resource set are different, and the RA-RNTI corresponding to the RO in any RO group in the target resource set is different from the RA-RNTI corresponding to the RO not in the RO group in the same system frame.

[0198] For other specific descriptions in the embodiments of the present application, please refer to the relevant descriptions in the above-mentioned UE side method embodiment. In order to avoid repetition, they will not be repeated here.

[0199] The PRACH repeated transmission method provided in the embodiment of the present application may be executed by a PRACH repeated transmission device. In the embodiment of the present application, the PRACH repeated transmission method performed by the PRACH repeated transmission device is taken as an example to illustrate the PRACH repeated transmission device provided in the embodiment of the present application.

[0200] Combination Fig.12 , an embodiment of the present application provides a PRACH repeated transmission device 120, which may include a transmission module 121. The transmission module 121 may be used to repeatedly transmit PRACH to a network side device using at least two beams on resources in a target resource set corresponding to a first number of times, when the RSRP of at least one downlink reference signal measured by the UE meets a target condition; wherein at least some of the at least two beams are different, and the first number is the number of PRACH repeated transmissions corresponding to the target condition, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to a signal transmission quality threshold.

[0201] In a possible implementation, the RSRP of the at least one downlink reference signal satisfies the target condition, which may include at least one of the following: the RSRP of a downlink reference signal is greater than or equal to a first RSRP threshold value; the first RSRP is greater than or equal to a second RSRP threshold value, and the first RSRP is an RSRP determined by the UE based on the RSRP of the at least one downlink reference signal; the number of first downlink reference signals is greater than or equal to a first number threshold value, and the first downlink reference signal is a different downlink reference signal whose RSRP is greater than or equal to a third RSRP threshold value in the at least one downlink reference signal; the number of second downlink reference signals is less than or equal to a second number threshold value, and the second downlink reference signal is a different downlink reference signal whose RSRP is less than or equal to a fourth RSRP threshold value in the at least one downlink reference signal; the difference between the RSRPs of different downlink reference signals in the at least one downlink reference signal is less than or equal to a fifth RSRP threshold value; the RSRP of the target SSB is greater than or equal to a sixth RSRP threshold value, and the target SSB is an SSB selected by the UE based on the RSRP of the at least one downlink reference signal.

[0202] In a possible implementation, the target resource set may include at least one RO group, each RO group includes at least two ROs associated with the same SSB; wherein ROs located in different frames and having the same time-frequency positions are not in the same RO group.

[0203] In one possible implementation, the sending module 121 can be specifically used to repeatedly send the first number of PRACHs to the above-mentioned network side device on the resources in the above-mentioned target resource set using the above-mentioned at least two beams with the same number as the above-mentioned first number when the RSRP of the above-mentioned at least one downlink reference signal meets the above-mentioned target condition.

[0204] In one possible implementation, the sending module 121 may also be used to repeatedly send the first number of PRACHs to the network side device on the resources in the target resource set using the at least two beams with the same number as the second number when the RSRP of the at least one downlink reference signal does not meet the target condition and is greater than or equal to at least one threshold value corresponding to the second number; wherein the second number is a number of PRACH repetitions that is different from the first number.

[0205] In a possible implementation, the PRACH repeated transmission device 120 may further include a first determination module. The first determination module may be used to measure the RSRP of the at least one downlink reference signal before repeatedly transmitting the PRACH to the network side device using the at least two beams on the resources in the target resource set corresponding to the first number when the RSRP of the at least one downlink reference signal measured by the transmission module 121 at the UE meets the target condition, and determine the second RSRP based on the RSRP of the at least one downlink reference signal; and determine the first number as the number of times the PRACH is repeatedly transmitted to the network side device using the at least two beams when the second RSRP belongs to the RSRP interval corresponding to the first number and the UE supports repeated transmission of the PRACH of the first number.

[0206] In a possible implementation, the PRACH repeated transmission device 120 may further include a receiving module and a second determination module. The receiving module may be used to receive uplink transmission indication information sent by the network side device after the sending module 121 repeatedly transmits PRACH to the network side device on the resources in the target resource set corresponding to the first number using the at least two beams when the RSRP of the at least one downlink reference signal measured by the UE meets the target condition, and the uplink transmission indication information is used to indicate at least one of the following: a beam, a wave array, a PRACH transmission in PRACH repeated transmission, a group of PRACH transmissions in PRACH repeated transmission, and an antenna panel. The second determination module may be used to determine, according to the uplink transmission indication information received by the receiving module, an object indicated by the uplink transmission indication information as an object used for uplink transmission.

[0207] In one possible implementation, the above-mentioned uplink transmission indication information may include at least one of the following: RAPID carried in Msg2; RA-RNTI; RA-RNTI and target time unit information, the target time unit information is related to the PRACH transmission indicated by the uplink transmission indication information; reserved bits in DCI; at least part of the bits of a field in RAR; at least part of the bits of multiple fields in RAR.

[0208] In a possible implementation, the uplink transmission indication information is sent by the network side device through high-layer signaling. The second determination module can be specifically used to send the uplink transmission indication information to the physical layer through the MAC layer, and determine the object indicated by the uplink transmission indication information as the object used for uplink transmission through the physical layer.

[0209] In the PRACH repeated transmission device provided in the embodiment of the present application, since the RSRP of at least one reference signal measured by the UE meets the target condition, the PRACH repeated transmission device can use different beams to repeatedly transmit PRACH to the network side device on the resources corresponding to the number of PRACH repeated transmissions corresponding to the target condition, and the target condition can be used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold. Therefore, after repeatedly transmitting PRACH of different beams, the UE can receive the beam or antenna panel with the best signal transmission quality indicated by the network side device, thereby avoiding the UE from performing meaningless repeated transmission of PRACH of different beams.

[0210] The PRACH repetitive transmission device in the embodiment of the present application may be an electronic device, such as an electronic device having an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a UE. Exemplarily, the UE may include but is not limited to the types of UE11 listed above, and the embodiment of the present application does not specifically limit this.

[0211] The PRACH repeated transmission device provided in the embodiment of the present application can implement the various processes implemented by the above-mentioned UE side method embodiment and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0212] Combination Fig.13 , an embodiment of the present application provides another PRACH repeated transmission device 130, which may include a receiving module 131. The receiving module 131 may be used to receive a PRACH repeatedly transmitted by a UE using at least two beams on resources in a target resource set corresponding to a first number of times; wherein at least some of the at least two beams are different, and the first number of times is the number of PRACH repeated transmissions corresponding to a target condition satisfied by the RSRP of at least one downlink reference signal measured by the UE, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to a signal transmission quality threshold.

[0213] In a possible implementation, the RSRP of the at least one downlink reference signal satisfies the target condition, which may include at least one of the following: the RSRP of a downlink reference signal is greater than or equal to a first RSRP threshold value; the first RSRP is greater than or equal to a second RSRP threshold value, and the first RSRP is an RSRP determined by the UE based on the RSRP of the at least one downlink reference signal; the number of first downlink reference signals is greater than or equal to a first number threshold value, and the first downlink reference signal is a different downlink reference signal whose RSRP is greater than or equal to a third RSRP threshold value in the at least one downlink reference signal; the number of second downlink reference signals is less than or equal to a second number threshold value, and the second downlink reference signal is a different downlink reference signal whose RSRP is less than or equal to a fourth RSRP threshold value in the at least one downlink reference signal; the difference between the RSRPs of different downlink reference signals in the at least one downlink reference signal is less than or equal to a fifth RSRP threshold value; the RSRP of the target SSB is greater than or equal to a sixth RSRP threshold value, and the target SSB is an SSB selected by the UE based on the RSRP of the at least one downlink reference signal.

[0214] In a possible implementation, the target resource set may include at least one RO group, each RO group includes at least two ROs associated with the same SSB; wherein ROs located in different frames and having the same time-frequency positions are not in the same RO group.

[0215] In a possible implementation, the PRACH repeated transmission device 130 may further include a transmission module. The transmission module may be configured to send uplink transmission indication information to the UE after the receiving module 131 receives the PRACH repeatedly transmitted by the UE using the at least two beams on the resources in the target resource set corresponding to the first number; wherein the uplink transmission indication information is used to indicate at least one of the following: a beam, a wave array, a PRACH transmission in the PRACH repeated transmission, a group of PRACH transmissions in the PRACH repeated transmission, and an antenna panel.

[0216] In one possible implementation, the above-mentioned uplink transmission indication information may include at least one of the following: RAPID carried in Msg2; RA-RNTI; RA-RNTI and target time unit information, the target time unit information is related to the PRACH transmission indicated by the uplink transmission indication information; reserved bits in DCI; at least part of the bits of a field in RAR; at least part of the bits of multiple fields in RAR.

[0217] In one possible implementation, the target time unit information may be used to indicate at least one of the following: a system frame number in which a PRACH is sent; a system frame number in which a group of PRACHs are sent; a function value of a system frame number in which a PRACH is sent; a function value of a system frame number in which a group of PRACHs are sent.

[0218] In a possible implementation, the uplink transmission indication information includes the RA-RNTI. The target resource set satisfies at least one of the following: the RA-RNTIs corresponding to different ROs in any RO group in the target resource set are different, and the RA-RNTI corresponding to the ROs in any RO group is different from the RA-RNTI corresponding to the ROs not in the RO group in the same system frame; the RA-RNTIs corresponding to different ROs between any two RO groups in the target resource set are different, and the RA-RNTI corresponding to the ROs in any RO group in the target resource set is different from the RA-RNTI corresponding to the ROs not in the RO group in the same system frame.

[0219] In the PRACH repeated transmission device provided in the embodiment of the present application, since the PRACH repeated transmission device can receive the PRACH repeatedly transmitted by the UE using different beams on the resources corresponding to the number of PRACH repeated transmissions corresponding to the target condition satisfied by the RSRP of at least one downlink reference signal measured by the UE, and the target condition can be used to ensure that the signal transmission quality of the beam or antenna panel indicated to the UE is greater than or equal to the signal transmission quality threshold, the beam or antenna panel with the best signal transmission quality can be indicated to the UE based on the PRACH repeatedly transmitted by the UE using different beams, thereby avoiding the UE from performing meaningless repeated transmission of PRACH in different beams.

[0220] The PRACH repetition transmission device in the embodiment of the present application may be an electronic device, such as an electronic device having an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a device other than a UE. Exemplarily, the other device may be a server, a network attached storage (NAS), etc., which is not specifically limited in the embodiment of the present application.

[0221] The PRACH repeated transmission device provided in the embodiment of the present application can implement the various processes implemented by the above-mentioned network side device method embodiment and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0222] like Fig.14As shown, the embodiment of the present application further provides a communication device 100, including a processor 101 and a memory 102, and the memory 102 stores a program or instruction that can be run on the processor 101. For example, when the communication device 100 is a UE, the program or instruction is executed by the processor 101 to implement the various steps of the above-mentioned UE side method embodiment, and can achieve the same technical effect. When the communication device 100 is a network side device, the program or instruction is executed by the processor 101 to implement the various steps of the above-mentioned network side device method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0223] An embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps in the above-mentioned UE-side method embodiment. The communication interface is used to repeatedly send PRACH to a network-side device using at least two beams on resources in a target resource set corresponding to a first number of times, when the RSRP of at least one downlink reference signal measured by the terminal meets the target condition; wherein at least some of the at least two beams are different, and the first number is the number of PRACH repetitions corresponding to the target condition, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network-side device to the terminal is greater than or equal to a signal transmission quality threshold. This terminal embodiment corresponds to the above-mentioned UE-side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect. Specifically, Fig.15 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0224] The terminal 1000 includes but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009 and at least some of the components of a processor 1010.

[0225] Those skilled in the art will appreciate that the terminal 1000 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 1010 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.15 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0226] It should be understood that in the embodiment of the present application, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042, and the graphics processor 10041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0227] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 1001 can transmit the data to the processor 1010 for processing; in addition, the RF unit 1001 can send uplink data to the network side device. Generally, the RF unit 1001 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0228] The memory 1009 can be used to store software programs or instructions and various data. The memory 1009 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1009 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 1009 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0229] The processor 1010 may include one or more processing units; optionally, the processor 1010 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1010.

[0230] Among them, the radio frequency unit 1001 can be used to repeatedly send PRACH to the network side device using at least two beams on the resources in the target resource set corresponding to the first number of times when the RSRP of at least one downlink reference signal measured by the terminal 1000 meets the target condition; wherein at least some of the at least two beams are different, and the first number is the number of PRACH repetitions corresponding to the target condition, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the terminal 1000 is greater than or equal to the signal transmission quality threshold.

[0231] In a possible implementation, the RSRP of the at least one downlink reference signal satisfies the target condition, which may include at least one of the following: the RSRP of a downlink reference signal is greater than or equal to a first RSRP threshold value; the first RSRP is greater than or equal to a second RSRP threshold value, and the first RSRP is an RSRP determined by the terminal 1000 based on the RSRP of the at least one downlink reference signal; the number of first downlink reference signals is greater than or equal to a first number threshold value, and the first downlink reference signal is a different downlink reference signal whose RSRP is greater than or equal to a third RSRP threshold value in the at least one downlink reference signal; the number of second downlink reference signals is less than or equal to a second number threshold value, and the second downlink reference signal is a different downlink reference signal whose RSRP is less than or equal to a fourth RSRP threshold value in the at least one downlink reference signal; the difference between the RSRPs of different downlink reference signals in the at least one downlink reference signal is less than or equal to a fifth RSRP threshold value; the RSRP of the target SSB is greater than or equal to a sixth RSRP threshold value, and the target SSB is an SSB selected by the terminal 1000 based on the RSRP of the at least one downlink reference signal.

[0232] In a possible implementation, the target resource set may include at least one RO group, each RO group includes at least two ROs associated with the same SSB; wherein ROs located in different frames and having the same time-frequency positions are not in the same RO group.

[0233] In one possible implementation, the radio frequency unit 1001 can be specifically used to repeatedly send the first number of PRACHs to the above-mentioned network side device on the resources in the above-mentioned target resource set using the above-mentioned at least two beams with the same number as the above-mentioned first number when the RSRP of the above-mentioned at least one downlink reference signal meets the above-mentioned target condition.

[0234] In a possible implementation, the radio frequency unit 1001 may also be used to repeatedly send the first number of PRACHs to the network side device on the resources in the target resource set using the at least two beams with the same number as the second number when the RSRP of the at least one downlink reference signal does not meet the target condition and is greater than or equal to at least one threshold value corresponding to the second number; wherein the second number is a number of PRACH repetitions that is different from the first number.

[0235] In one possible implementation, the processor 1010 may be used to measure the RSRP of the at least one downlink reference signal before repeatedly sending the PRACH to the network side device using the at least two beams on the resources in the target resource set corresponding to the first number when the RSRP of the at least one downlink reference signal measured by the radio frequency unit 1001 at the terminal 1000 meets the target condition, and determine a second RSRP based on the RSRP of the at least one downlink reference signal; and when the second RSRP belongs to the RSRP interval corresponding to the first number and the terminal 1000 supports repeated sending of the PRACH of the first number, determine the first number as the number of times the PRACH is repeatedly sent to the network side device using the at least two beams.

[0236] In a possible implementation, the radio frequency unit 1001 may also be used to receive uplink transmission indication information sent by the network side device after repeatedly sending PRACH to the network side device using the at least two beams on the resources in the target resource set corresponding to the first number when the RSRP of the at least one downlink reference signal measured by the terminal 1000 meets the target condition, and the uplink transmission indication information is used to indicate at least one of the following: a beam, a wave array, a PRACH transmission in repeated PRACH transmissions, a group of PRACH transmissions in repeated PRACH transmissions, and an antenna panel. The processor 1010 may also be used to determine, based on the uplink transmission indication information received by the radio frequency unit 1001, an object indicated by the uplink transmission indication information as an object used for uplink transmission.

[0237] In one possible implementation, the above-mentioned uplink transmission indication information may include at least one of the following: RAPID carried in Msg2; RA-RNTI; RA-RNTI and target time unit information, the target time unit information is related to the PRACH transmission indicated by the uplink transmission indication information; reserved bits in DCI; at least part of the bits of a field in RAR; at least part of the bits of multiple fields in RAR.

[0238] In a possible implementation, the uplink transmission indication information is sent by the network side device through high-layer signaling. The second determination module can be specifically used to send the uplink transmission indication information to the physical layer through the MAC layer, and determine the object indicated by the uplink transmission indication information as the object used for uplink transmission through the physical layer.

[0239] In the terminal provided in the embodiment of the present application, since the RSRP of at least one reference signal measured by the terminal meets the target condition, the terminal can use different beams to repeatedly send PRACH to the network side device on the resources corresponding to the number of PRACH repetitions corresponding to the target condition, and the target condition can be used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the terminal is greater than or equal to the signal transmission quality threshold. Therefore, after repeatedly sending PRACH of different beams, the terminal can receive the beam or antenna panel with the best signal transmission quality indicated by the network side device, thereby avoiding the terminal from meaninglessly sending PRACH of different beams.

[0240] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the above-mentioned UE side method embodiment, and achieve the same or corresponding technical effect. To avoid repetition, it will not be repeated here.

[0241] The embodiment of the present application also provides a network side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the above network side device method embodiment. The communication interface is used to receive the PRACH repeatedly sent by the UE using at least two beams on the resources in the target resource set corresponding to the first number of times; wherein at least some of the at least two beams are different, and the first number is the number of PRACH repetitions corresponding to the target condition satisfied by the RSRP of at least one downlink reference signal measured by the UE, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold. The network side device embodiment corresponds to the above network side device method embodiment, and each implementation process and implementation method of the above method embodiment can be applied to the network side device embodiment, and can achieve the same technical effect.

[0242] Specifically, the embodiment of the present application also provides a network side device. Fig.16As shown, the network side device 1700 includes: an antenna 171, a radio frequency device 172, a baseband device 173, a processor 174 and a memory 175. The antenna 171 is connected to the radio frequency device 172. In the uplink direction, the radio frequency device 172 receives information through the antenna 171 and sends the received information to the baseband device 173 for processing. In the downlink direction, the baseband device 173 processes the information to be sent and sends it to the radio frequency device 172, and the radio frequency device 172 processes the received information and sends it out through the antenna 171.

[0243] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 173, which includes a baseband processor.

[0244] The baseband device 173 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig.16 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 175 through a bus interface to call the program in the memory 175 to execute the network device operations shown in the above method embodiment.

[0245] The network side device may further include a network interface 176, which may be, for example, a common public radio interface (CommonPubl17c Rad17o 17nterface, CPR17).

[0246] Specifically, the network side device 1700 of the embodiment of the present invention further includes: instructions or programs stored in the memory 175 and executable on the processor 174, and the processor 174 calls the instructions or programs in the memory 175 to execute. Fig.13 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0247] Among them, the radio frequency device 172 can be used to receive PRACH repeatedly sent by the UE using at least two beams on resources in the target resource set corresponding to the first number of times; wherein at least some of the at least two beams are different, and the first number of times is the number of PRACH repetitions corresponding to the target condition satisfied by the RSRP of at least one downlink reference signal measured by the UE, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold.

[0248] In a possible implementation, the RSRP of the at least one downlink reference signal satisfies the target condition, which may include at least one of the following: the RSRP of a downlink reference signal is greater than or equal to a first RSRP threshold value; the first RSRP is greater than or equal to a second RSRP threshold value, and the first RSRP is an RSRP determined by the UE based on the RSRP of the at least one downlink reference signal; the number of first downlink reference signals is greater than or equal to a first number threshold value, and the first downlink reference signal is a different downlink reference signal whose RSRP is greater than or equal to a third RSRP threshold value in the at least one downlink reference signal; the number of second downlink reference signals is less than or equal to a second number threshold value, and the second downlink reference signal is a different downlink reference signal whose RSRP is less than or equal to a fourth RSRP threshold value in the at least one downlink reference signal; the difference between the RSRPs of different downlink reference signals in the at least one downlink reference signal is less than or equal to a fifth RSRP threshold value; the RSRP of the target SSB is greater than or equal to a sixth RSRP threshold value, and the target SSB is an SSB selected by the UE based on the RSRP of the at least one downlink reference signal.

[0249] In a possible implementation, the target resource set may include at least one RO group, each RO group includes at least two ROs associated with the same SSB; wherein ROs located in different frames and having the same time-frequency positions are not in the same RO group.

[0250] In one possible implementation, the radio frequency device 172 may also be used to send uplink transmission indication information to the UE after receiving the PRACH repeatedly sent by the UE using the at least two beams on the resources in the target resource set corresponding to the first number; wherein the uplink transmission indication information is used to indicate at least one of the following: a beam, a wave array, a PRACH transmission in PRACH repeated transmissions, a group of PRACH transmissions in PRACH repeated transmissions, and an antenna panel.

[0251] In one possible implementation, the above-mentioned uplink transmission indication information may include at least one of the following: RAPID carried in Msg2; RA-RNTI; RA-RNTI and target time unit information, the target time unit information is related to the PRACH transmission indicated by the uplink transmission indication information; reserved bits in DCI; at least part of the bits of a field in RAR; at least part of the bits of multiple fields in RAR.

[0252] In one possible implementation, the target time unit information may be used to indicate at least one of the following: a system frame number in which a PRACH is sent; a system frame number in which a group of PRACHs are sent; a function value of a system frame number in which a PRACH is sent; a function value of a system frame number in which a group of PRACHs are sent.

[0253] In a possible implementation, the uplink transmission indication information includes the RA-RNTI. The target resource set satisfies at least one of the following: the RA-RNTIs corresponding to different ROs in any RO group in the target resource set are different, and the RA-RNTI corresponding to the ROs in any RO group is different from the RA-RNTI corresponding to the ROs not in the RO group in the same system frame; the RA-RNTIs corresponding to different ROs between any two RO groups in the target resource set are different, and the RA-RNTI corresponding to the ROs in any RO group in the target resource set is different from the RA-RNTI corresponding to the ROs not in the RO group in the same system frame.

[0254] In the network side device provided in the embodiment of the present application, since the network side device can receive the PRACH repeatedly sent by the UE using different beams on the resources corresponding to the number of PRACH repetitions corresponding to the target condition satisfied by the RSRP of at least one downlink reference signal measured by the UE, and the target condition can be used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold, the beam or antenna panel with the best signal transmission quality can be indicated to the UE based on the PRACH repeatedly sent by the UE using different beams, thereby avoiding the UE from performing meaningless repetitions of PRACH in different beams.

[0255] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the above-mentioned network side device method embodiment, and achieve the same or corresponding technical effect. To avoid repetition, it will not be repeated here.

[0256] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned PRACH repeated transmission method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0257] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0258] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned PRACH repeated transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0259] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0260] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium, and is executed by at least one processor to implement the various processes of the above-mentioned PRACH repeated transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0261] An embodiment of the present application also provides a communication system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the UE side method as described above, and the network side device can be used to execute the steps of the network side device method as described above.

[0262] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0263] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable a terminal or a network-side device to execute the methods described in each embodiment of the present application.

[0264] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. A method for repeatedly sending a physical random access channel PRACH, characterized in that: The method comprises: When a reference signal received power RSRP of at least one downlink reference signal measured by a user equipment UE meets a target condition, the UE repeatedly sends a PRACH to a network side device using at least two beams on resources in a target resource set corresponding to a first number of times; Among them, at least some of the at least two beams are different, the first number is the number of PRACH repetitions corresponding to the target condition, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold.

2. The method according to claim 1, characterized in that The RSRP of the at least one downlink reference signal meets the target condition, including at least one of the following: The RSRP of a downlink reference signal is greater than or equal to a first RSRP threshold value; The first RSRP is greater than or equal to a second RSRP threshold value, where the first RSRP is an RSRP determined by the UE based on the RSRP of the at least one downlink reference signal; The number of first downlink reference signals is greater than or equal to a first number threshold value, and the first downlink reference signals are different downlink reference signals whose RSRP is greater than or equal to a third RSRP threshold value among the at least one downlink reference signal; The number of second downlink reference signals is less than or equal to a second number threshold value, and the second downlink reference signals are different downlink reference signals whose RSRP is less than or equal to a fourth RSRP threshold value among the at least one downlink reference signal; A difference between RSRPs of different downlink reference signals in the at least one downlink reference signal is less than or equal to a fifth RSRP threshold value; The RSRP of the target synchronization signal block SSB is greater than or equal to a sixth RSRP threshold value, and the target SSB is an SSB selected by the UE based on the RSRP of the at least one downlink reference signal.

3. The method according to claim 1, characterized in that The target resource set includes at least one physical random access channel transmission opportunity RO group, each RO group includes at least two ROs associated with the same SSB; Among them, ROs located in different frames and having the same time-frequency position are not in the same RO group.

4. The method according to claim 1, characterized in that: When the RSRP of at least one downlink reference signal measured by the UE meets the target condition, the UE uses at least two beams to repeatedly send the PRACH to the network side device on resources in the target resource set corresponding to the first number of times, including: When the RSRP of the at least one downlink reference signal meets the target condition, the UE repeatedly sends the PRACH for the first number of times to the network side device on the resources in the target resource set using the at least two beams that are the same number as the first number of times.

5. The method according to claim 1, characterized in that: The method further comprises: When the RSRP of the at least one downlink reference signal does not meet the target condition and is greater than or equal to at least one threshold value corresponding to the second number, the UE repeatedly sends the PRACH of the first number to the network side device on resources in the target resource set using the at least two beams having the same number as the second number; The second number is a number of PRACH repetition transmissions that is different from the first number.

6. The method according to claim 1, characterized in that When the RSRP of at least one downlink reference signal measured by the UE meets the target condition, before the UE repeatedly sends the PRACH to the network side device using at least two beams on the resources in the target resource set corresponding to the first number of times, the method further includes: The UE measures the RSRP of the at least one downlink reference signal, and determines a second RSRP according to the RSRP of the at least one downlink reference signal; When the second RSRP belongs to the RSRP interval corresponding to the first number of times and the UE supports repeated sending of PRACH the first number of times, the UE determines the first number of times as the number of times the PRACH is repeatedly sent to the network side device using the at least two beams.

7. The method according to any one of claims 1 to 6, characterized in that When the RSRP of at least one downlink reference signal measured by the UE meets the target condition, after the UE repeatedly sends the PRACH to the network side device using at least two beams on the resources in the target resource set corresponding to the first number of times, the method further includes: The UE receives uplink transmission indication information sent by the network side device, where the uplink transmission indication information is used to indicate at least one of the following: a beam, a wave array, a PRACH transmission in PRACH repeated transmission, a group of PRACH transmissions in PRACH repeated transmission, and an antenna panel; The UE determines, according to the uplink transmission indication information, the object indicated by the uplink transmission indication information as the object used for uplink transmission.

8. The method according to claim 7, characterized in that The uplink transmission indication information includes at least one of the following: The random access channel preamble identifier RAPID carried in the message Msg2; Random access radio network temporary identifier RA-RNTI; RA-RNTI and target time unit information, where the target time unit information is related to the PRACH transmission indicated by the uplink transmission indication information; Reserved bits in downlink control information DCI; At least part of the bits of a field in a random access response RAR; At least some of the bits of multiple fields in the RAR.

9. The method according to claim 7, characterized in that: The uplink transmission indication information is sent by the network side device through high-layer signaling; The UE determining, according to the uplink transmission indication information, the object indicated by the uplink transmission indication information as an object used for uplink transmission, including: The UE sends the uplink transmission indication information to the physical layer through the media access control MAC layer, and determines the object indicated by the uplink transmission indication information as the object used for uplink transmission through the physical layer.

10. A PRACH repeated transmission method, characterized in that: The method comprises: The network side device receives, on resources in the target resource set corresponding to the first number, a PRACH repeatedly sent by the UE using at least two beams; Among them, at least some of the at least two beams are different, and the first number is the number of PRACH repetitions corresponding to the target condition satisfied by the RSRP of at least one downlink reference signal measured by the UE, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold.

11. The method according to claim 10, characterized in that The RSRP of the at least one downlink reference signal satisfies the target condition, including at least one of the following: The RSRP of a downlink reference signal is greater than or equal to a first RSRP threshold value; The first RSRP is greater than or equal to a second RSRP threshold value, where the first RSRP is an RSRP determined by the UE based on the RSRP of the at least one downlink reference signal; The number of first downlink reference signals is greater than or equal to a first number threshold value, and the first downlink reference signals are different downlink reference signals whose RSRP is greater than or equal to a third RSRP threshold value among the at least one downlink reference signal; The number of second downlink reference signals is less than or equal to a second number threshold value, and the second downlink reference signals are different downlink reference signals whose RSRP is less than or equal to a fourth RSRP threshold value among the at least one downlink reference signal; A difference between RSRPs of different downlink reference signals in the at least one downlink reference signal is less than or equal to a fifth RSRP threshold value; The RSRP of the target SSB is greater than or equal to a sixth RSRP threshold value, and the target SSB is an SSB selected by the UE based on the RSRP of the at least one downlink reference signal.

12. The method according to claim 10, characterized in that The target resource set includes at least one RO group, each RO group includes at least two ROs associated with the same SSB; Among them, ROs located in different frames and having the same time-frequency position are not in the same RO group.

13. The method according to any one of claims 10 to 12, characterized in that After the network side device receives, on a resource in a target resource set corresponding to a first number of times, a PRACH repeatedly transmitted by the UE using at least two beams, the method further includes: The network side device sends uplink transmission indication information to the UE; The uplink transmission indication information is used to indicate at least one of the following: a beam, a wave array, a PRACH transmission in PRACH repeated transmissions, a group of PRACH transmissions in PRACH repeated transmissions, and an antenna panel.

14. The method according to claim 13, characterized in that The uplink transmission indication information includes at least one of the following: RAPID carried in Msg2; RA-RNTI; RA-RNTI and target time unit information, where the target time unit information is related to the PRACH transmission indicated by the uplink transmission indication information; Reserved bits in DCI; at least some of the bits of a field in the RAR; At least some of the bits of multiple fields in the RAR.

15. The method according to claim 14, characterized in that The target time unit information is used to indicate at least one of the following: The system frame number in which a PRACH is sent; A set of system frame numbers in which PRACH is sent; The function value of the system frame number in which a PRACH is sent; A function value of the system frame number in which a group of PRACH transmissions are located.

16. The method according to claim 14 or 15, characterized in that The uplink transmission indication information includes the RA-RNTI; The target resource set satisfies at least one of the following: Different ROs in any RO group in the target resource set have different RA-RNTIs corresponding to them, and the RA-RNTI corresponding to the RO in any RO group is different from the RA-RNTI corresponding to the RO not in the RO group in the same system frame; The RA-RNTIs corresponding to different ROs between any two RO groups in the target resource set are different, and the RA-RNTI corresponding to the RO in any RO group in the target resource set is different from the RA-RNTI corresponding to the RO not in the RO group in the same system frame.

17. A PRACH repeated transmission device, characterized in that: The device comprises a sending module; The sending module is configured to repeatedly send the PRACH to the network side device using at least two beams on resources in a target resource set corresponding to a first number of times when the RSRP of at least one downlink reference signal measured by the UE meets a target condition; Among them, at least some of the at least two beams are different, the first number is the number of PRACH repetitions corresponding to the target condition, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold.

18. The device according to claim 17, characterized in that The RSRP of the at least one downlink reference signal meets the target condition, including at least one of the following: The RSRP of a downlink reference signal is greater than or equal to a first RSRP threshold value; The first RSRP is greater than or equal to a second RSRP threshold value, where the first RSRP is an RSRP determined by the UE based on the RSRP of the at least one downlink reference signal; The number of first downlink reference signals is greater than or equal to a first number threshold value, and the first downlink reference signals are different downlink reference signals whose RSRP is greater than or equal to a third RSRP threshold value among the at least one downlink reference signal; The number of second downlink reference signals is less than or equal to a second number threshold value, and the second downlink reference signals are different downlink reference signals whose RSRP is less than or equal to a fourth RSRP threshold value among the at least one downlink reference signal; A difference between RSRPs of different downlink reference signals in the at least one downlink reference signal is less than or equal to a fifth RSRP threshold value; The RSRP of the target SSB is greater than or equal to a sixth RSRP threshold value, and the target SSB is an SSB selected by the UE based on the RSRP of the at least one downlink reference signal.

19. The device according to claim 17, characterized in that The target resource set includes at least one RO group, each RO group includes at least two ROs associated with the same SSB; Among them, ROs located in different frames and having the same time-frequency position are not in the same RO group.

20. The device according to claim 17, characterized in that The sending module is specifically used to repeatedly send the first number of PRACHs to the network side device on the resources in the target resource set using the at least two beams that are the same in number as the first number of times when the RSRP of the at least one downlink reference signal meets the target condition.

21. The device according to claim 17, characterized in that The sending module is further configured to, when the RSRP of the at least one downlink reference signal does not meet the target condition and is greater than or equal to at least one threshold value corresponding to the second number, repeatedly send the PRACH of the first number to the network side device on the resources in the target resource set using the at least two beams with the same number as the second number; The second number is a number of PRACH repetition transmissions that is different from the first number.

22. The device according to claim 17, characterized in that The device also includes a first determination module; The first determination module is used to measure the RSRP of the at least one downlink reference signal before repeatedly sending PRACH to the network side device using the at least two beams on the resources in the target resource set corresponding to the first number of times, if the RSRP of the at least one downlink reference signal measured by the sending module of the UE meets the target condition, and determine a second RSRP based on the RSRP of the at least one downlink reference signal; and determine the first number as the number of times PRACH is repeatedly sent to the network side device using the at least two beams if the second RSRP belongs to the RSRP interval corresponding to the first number of times and the UE supports repeated sending of PRACH the first number of times.

23. The device according to any one of claims 17 to 22, characterized in that The device also includes a receiving module and a second determining module; The receiving module is configured to receive uplink transmission indication information sent by the network side device after repeatedly sending PRACH to the network side device using the at least two beams on the resources in the target resource set corresponding to the first number of times, if the RSRP of the at least one downlink reference signal measured by the UE by the sending module meets the target condition, wherein the uplink transmission indication information is used to indicate at least one of the following: a beam, a wave array, a PRACH transmission in repeated PRACH transmissions, a group of PRACH transmissions in repeated PRACH transmissions, and an antenna panel; The second determining module is used to determine, according to the uplink transmission indication information received by the receiving module, the object indicated by the uplink transmission indication information as the object used for uplink transmission.

24. The device according to claim 23, characterized in that The uplink transmission indication information includes at least one of the following: RAPID carried in Msg2; RA-RNTI; RA-RNTI and target time unit information, where the target time unit information is related to the PRACH transmission indicated by the uplink transmission indication information; Reserved bits in DCI; at least some of the bits of a field in the RAR; At least some of the bits of multiple fields in the RAR.

25. The device according to claim 23, characterized in that The uplink transmission indication information is sent by the network side device through high-layer signaling; The second determining module is specifically configured to send the uplink transmission indication information to the physical layer through the MAC layer, and determine the object indicated by the uplink transmission indication information as the object used for uplink transmission through the physical layer.

26. A PRACH repeated transmission device, characterized in that: The device comprises a receiving module; The receiving module is used to receive, on resources in the target resource set corresponding to the first number of times, a PRACH repeatedly transmitted by the UE using at least two beams; Among them, at least some of the at least two beams are different, and the first number is the number of PRACH repetitions corresponding to the target condition satisfied by the RSRP of at least one downlink reference signal measured by the UE, and the target condition is used to ensure that the signal transmission quality of the beam or antenna panel indicated by the network side device to the UE is greater than or equal to the signal transmission quality threshold.

27. The device according to claim 26, characterized in that The RSRP of the at least one downlink reference signal satisfies the target condition, including at least one of the following: The RSRP of a downlink reference signal is greater than or equal to a first RSRP threshold value; The first RSRP is greater than or equal to a second RSRP threshold value, where the first RSRP is an RSRP determined by the UE based on the RSRP of the at least one downlink reference signal; The number of first downlink reference signals is greater than or equal to a first number threshold value, and the first downlink reference signals are different downlink reference signals whose RSRP is greater than or equal to a third RSRP threshold value among the at least one downlink reference signal; The number of second downlink reference signals is less than or equal to a second number threshold value, and the second downlink reference signals are different downlink reference signals whose RSRP is less than or equal to a fourth RSRP threshold value among the at least one downlink reference signal; A difference between RSRPs of different downlink reference signals in the at least one downlink reference signal is less than or equal to a fifth RSRP threshold value; The RSRP of the target SSB is greater than or equal to a sixth RSRP threshold value, and the target SSB is an SSB selected by the UE based on the RSRP of the at least one downlink reference signal.

28. The device according to claim 26, characterized in that The target resource set includes at least one RO group, each RO group includes at least two ROs associated with the same SSB; Among them, ROs located in different frames and having the same time-frequency position are not in the same RO group.

29. The device according to any one of claims 26 to 28, characterized in that The device also includes a sending module; The sending module is configured to send uplink transmission indication information to the UE after the receiving module receives the PRACH repeatedly sent by the UE using the at least two beams on the resources in the target resource set corresponding to the first number of times; The uplink transmission indication information is used to indicate at least one of the following: a beam, a wave array, a PRACH transmission in PRACH repeated transmissions, a group of PRACH transmissions in PRACH repeated transmissions, and an antenna panel.

30. The device according to claim 29, characterized in that The uplink transmission indication information includes at least one of the following: RAPID carried in Msg2; RA-RNTI; RA-RNTI and target time unit information, where the target time unit information is related to the PRACH transmission indicated by the uplink transmission indication information; Reserved bits in DCI; at least some of the bits of a field in the RAR; At least some of the bits of multiple fields in the RAR.

31. The device according to claim 30, characterized in that The target time unit information is used to indicate at least one of the following: The system frame number in which a PRACH is sent; A set of system frame numbers in which PRACH is sent; The function value of the system frame number in which a PRACH is sent; A function value of the system frame number in which a group of PRACH transmissions are located.

32. The device according to claim 30 or 31, characterized in that The uplink transmission indication information includes the RA-RNTI; The target resource set satisfies at least one of the following: Different ROs in any RO group in the target resource set have different RA-RNTIs corresponding to them, and the RA-RNTI corresponding to the RO in any RO group is different from the RA-RNTI corresponding to the RO not in the RO group in the same system frame; The RA-RNTIs corresponding to different ROs between any two RO groups in the target resource set are different, and the RA-RNTI corresponding to the RO in any RO group in the target resource set is different from the RA-RNTI corresponding to the RO not in the RO group in the same system frame.

33. A terminal, characterized in that: The method comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the PRACH repeated transmission method according to any one of claims 1 to 9 are implemented.

34. A network side device, characterized in that: It comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the PRACH repeated transmission method according to any one of claims 10 to 16 are implemented.

35. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, it implements the PRACH repeated transmission method as described in any one of claims 1 to 9, or implements the steps of the PRACH repeated transmission method as described in any one of claims 10 to 16.

Images