Method, terminal and network side device for random access

Abstract

This application discloses a method, terminal, and network-side device for random access, belonging to the field of wireless communication technology. The random access method in this application includes: the terminal performing random access by repeatedly sending a first message Msg1.

Description

Technical Field

[0001] This application belongs to the field of wireless communication technology, specifically relating to a random access method, a terminal, and a network-side device. Background Technology

[0002] In New Radio (NR) systems, two types of random access procedures are typically supported: the 4-step Random Access Channel (RACH) for the first message (Msg1) and the 2-step RACH for MsgA. Both types of random access procedures support both contention-based RA (CBRA) and contention-free RA (CFRA).

[0003] However, for the aforementioned 4-step RACH procedure, during the random access process, for terminals located in deep fading areas such as cell edge areas or obstacle-blocked areas, the coverage performance of uplink channels such as Msg1 is worse than that of downlink channels or uplink channels in connected mode, making it difficult for terminals to achieve cell access. Summary of the Invention

[0004] This application provides a method, terminal, and network-side device for random access, which can solve the problem that it is difficult for terminals to achieve cell access.

[0005] In one aspect, a method for random access is provided, comprising: a terminal performing random access by repeatedly sending a first message Msg1.

[0006] Secondly, a method for random access is provided, the method comprising: a network-side device receiving a first message Msg1; wherein, Msg1 is sent by the terminal in the form of repeated transmission.

[0007] Thirdly, a random access device is provided for use in a terminal, the device comprising: a first transmission module for performing random access by repeatedly sending a first message Msg1.

[0008] Fourthly, a random access device is provided, applied to a network-side device, the device comprising: a second transmission module for receiving a first message Msg1; wherein Msg1 is sent by the terminal in the form of repeated transmission.

[0009] Fifthly, a terminal is provided, the terminal including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0010] In a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the method described in the first aspect.

[0011] In a seventh aspect, a network-side device is provided, the network-side device including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method as described in the second aspect.

[0012] Eighthly, a network-side device is provided, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the method described in the second aspect.

[0013] A ninth aspect provides a readable storage medium on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0014] In a tenth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0015] Eleventhly, a computer program product is provided, which is stored in a non-transient storage medium and is executed by at least one processor to implement the steps of the method as described in the first aspect, or to implement the steps of the method as described in the second aspect.

[0016] In this embodiment of the application, the terminal performs random access by repeatedly sending MSg1, which can enhance the coverage performance of Msg1 and ensure that the terminal can achieve efficient cell access. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a wireless communication system provided in an exemplary embodiment of this application.

[0018] Figure 2a This is one of the flowcharts illustrating a random access method provided in an exemplary embodiment of this application.

[0019] Figure 2b This is a schematic diagram illustrating the relationship between the transmit beam and the SSB provided in an exemplary embodiment of this application.

[0020] Figure 3 This is a second flowchart illustrating a random access method provided in an exemplary embodiment of this application.

[0021] Figure 4 This is the third flowchart illustrating the random access method provided in an exemplary embodiment of this application.

[0022] Figure 5 This is the fourth flowchart illustrating the random access method provided in an exemplary embodiment of this application.

[0023] Figure 6a This is one of the structural schematic diagrams of a random access device provided in an exemplary embodiment of this application. Figure 6b This is a second schematic diagram of the structure of a random access device provided in an exemplary embodiment of this application.

[0024] Figure 7 This is the third schematic diagram of the structure of a random access device provided in an exemplary embodiment of this application.

[0025] Figure 8 This is a schematic diagram of the structure of a terminal provided in an exemplary embodiment of this application.

[0026] Figure 9 This is a schematic diagram of the structure of a network-side device provided in an exemplary embodiment of this application. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, 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), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used not only in the systems and radio technologies mentioned above, but also in other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and NR terminology is used in most of the following description; however, these technologies can also be applied to applications beyond NR systems, such as 6th Generation (6G) communication systems.

[0030] Figure 1This diagram illustrates the structure of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can also be referred to as a terminal device or user equipment (UE). The terminal 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), etc. Wearable devices include smartwatches, wristbands, headphones, glasses, etc. It should be noted that this application does not limit the specific type of terminal 11. Network-side device 12 can be a base station or a core network. The base station can be referred to as a node B, evolved node B, access point, base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), B node, evolved B node (eNB), home B node, home evolved B node, WLAN access point, WiFi node, transmitting and receiving point (TRP), or any other suitable term 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 this application embodiment, only the base station in the NR system is used as an example, but the specific type of base station is not limited.

[0031] The technical solutions provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0032] like Figure 2a The diagram shown illustrates a flowchart of a random access method 200 provided in an exemplary embodiment of this application. This method 200 can be executed by, but is not limited to, a terminal, specifically by hardware and / or software installed in the terminal. In this embodiment, the method 200 may include at least the following steps.

[0033] S210, the terminal performs random access by repeatedly sending Msg1.

[0034] The random access procedure mentioned in this application is based on Msg1 4-step RACH. In this case, this application can enhance the coverage performance of Msg1 by repeatedly sending Msg1 for random access, enabling terminals located in deep fading areas such as cell edge areas or obstacle-blocked areas to achieve efficient cell access and ensure the reliability of wireless communication.

[0035] Optionally, when the terminal repeatedly transmits Msg1, it can do so based on a single beam (i.e., as shown in the image). Figure 2b As shown, multiple Msg1s can be associated with the same Synchronization Signal and PBCH block (SSB), or the Random Access Hour (RO) resource used when transmitting Msg1 can be associated with the same SSB; it can also be based on repeated transmission of Msg1s using multiple beams (i.e., as shown in the diagram). Figure 2b As shown, multiple Msg1 RO resources are associated with multiple different SSBs, or multiple Msg1 RO resources are associated with the same SSB, but each Msg1 uses a different transmit beam (no restrictions are imposed here).

[0036] Of course, when random access is performed by repeatedly transmitting Msg1, the subsequent reception operations of Msg2 / Msg4 and the transmission operations of Msg3 can be determined through static configuration or dynamic indication. For example, the terminal can determine the interpretation method of Msg2 and the transmission parameters of Msg3 based on static configuration or dynamic indication. These transmission parameters may include the number of transmissions and / or the transmission beam. It can be understood that the terminal's transmission beam can be described as a spatial domain transmission filter.

[0037] In this embodiment, the terminal achieves random access by repeatedly sending Msg1, which can enhance the coverage performance of Msg1 and ensure that the terminal can achieve efficient cell access.

[0038] like Figure 3 The diagram shown illustrates a flowchart of a random access method 300 provided in an exemplary embodiment of this application. This method 300 can be executed by, but is not limited to, a terminal, specifically by hardware and / or software installed in the terminal. In this embodiment, the method 300 may include at least the following steps.

[0039] S310, the terminal performs random access by repeatedly sending Msg1.

[0040] It is understood that the implementation process of S310 can be referred to the relevant description in method embodiment 200, and will not be repeated here to avoid repetition.

[0041] Understandably, in the case of repeated transmission of Msg1 for random access, the newly defined transmission format of Msg1 may affect the subsequent reception / transmission operations of Msg2 / 3 / 4 in the random access procedure. For example, when Msg1 is repeatedly transmitted and the RO resources of different Msg1s are associated with different SSBs, the terminal uses multiple uplink beams to transmit Msg1 and Msg3. Therefore, for Msg3 PUSCH transmission, the terminal needs to determine the uplink beam of Msg3 PUSCH before transmission.

[0042] Therefore, optionally, the method further includes:

[0043] S320, the terminal determines the sending parameters for the third message Msg3.

[0044] That is, the terminal determines the transmission parameters of the third message Msg3 when randomly accessing the system by repeatedly sending Msg1. Optionally, the transmission parameters may include the number of transmissions and / or the transmission beam.

[0045] In one possible implementation, the step of the terminal determining the number of times Msg3 is sent may include at least one of the following (11)-(14).

[0046] (11) The terminal determines the number of times Msg3 is sent based on the interpretation result of the uplink grant (UL Grant) included in the second message (Msg2) that it has been monitored.

[0047] It should be noted that Msg2 is obtained by the terminal after sending Msg1 by listening for Msg2.

[0048] Furthermore, in this embodiment, the terminal can interpret the UL Grant in Msg2 according to the first interpretation method to obtain the interpretation result of the UL Grant included in Msg2, such as the UL Grant format or whether the UL Grant indicates the number of transmissions of Msg3 and the indication information of the transmission beam, etc.

[0049] Optionally, the first interpretation method may include at least one of the following (111)-(113).

[0050] (111) UL Grant interpretation method indicated by first system information (SI). That is, the first interpretation method can be obtained through dynamic indication.

[0051] (112) Default UL Grant interpretation method. That is to say, the first interpretation method can be obtained through static configuration / protocol predefined method. In the scenario where Msg1 is repeatedly sent, the terminal interprets it according to the fixed UL grant format by default.

[0052] (113) UL Grant interpretation method indicated by the first field.

[0053] The first field may include any one of the fields in the sub-protocol data unit (sub PDU) included in Msg2 (such as reserved fields in the sub PDU), the fields in the UL grant included in Msg2, and the fields in the second downlink control information, wherein the second downlink control information is downlink control information (DCI) 1-0 scrambled with Random Access Radio Network Temporary Identifier (RA-RNTI).

[0054] The fields in the UL grant may include at least one of the following: Channel State Information Request (CSI request) field, Modulation and Coding Scheme (MCS) field (e.g., 1-2 bits of a 4-bit MCS field), and Transmit Power Control (TPC) field (e.g., 1-2 bits of a 3-bit TPC field). Additionally, a dedicated TDRA table can be defined via protocol predefinition or system messages. The TDRA table contains indication information (repetition count and / or transmit beam).

[0055] Of course, when indicating the UL Grant interpretation method through the aforementioned fields, one or more of the aforementioned fields can be configured to indicate the method through protocol agreement or high-level configuration, and the indication can be implemented in an explicit or implicit manner. This embodiment does not limit this.

[0056] Furthermore, when the terminal interprets the UL grant in Msg2 using the UL grant interpretation methods given in (111)-(113) above, the UL grant format corresponding to different interpretation methods may include any one of the following first UL grant format, second UL grant format and third UL grant format.

[0057] The first UL grant format indicates the number of times Msg3 is transmitted, but does not indicate the transmission beam of Msg3. Optionally, for the first UL grant format, the terminal can use the UL grant format defined in NR Rel-17 for interpretation.

[0058] In one implementation, the indication of the number of times Msg3 is sent can be achieved by redefining one or more fields in the UL grant (such as the PUSCH time resource allocation / TDRA field or MCS, etc.).

[0059] The second UL grant format, where the UL grant corresponding to the second UL grant format cannot indicate the number of transmissions and the transmission beam of Msg3. The second UL grant format can be understood as the UL grant format defined in NR Rel-15 / 16.

[0060] The third UL grant format, the UL grant corresponding to the third UL grant format, indicates the number of transmissions and the transmission beam of Msg3.

[0061] In one implementation, for the third UL grant format, the indication of the number of transmissions and the transmission beam of Msg3 can be achieved by redefining at least one of the fields in the UL grant (such as the CSI request field, the MCS field (e.g., 1 to 2 bits of the 4-bit MCS field), and the TPC field (e.g., 1 to 2 bits of the 3-bit TPC field); or, the indication of the number of transmissions and the transmission beam of Msg3 can also be achieved by defining a dedicated UL grant field, etc. This embodiment does not limit this.

[0062] Of course, based on the description of the first UL grant format, the second UL grant format and the third UL grant format, if the terminal interprets the UL grant included in Msg2 as the second UL grant format, then the terminal can further combine the subsequent (12) or (13) or other protocol pre-defined rules to determine the number of times Msg3 is sent.

[0063] If the terminal interprets the UL Grant included in Msg2 as being in either the first UL grant format or the third UL grant format, then the terminal can determine the number of times Msg3 is sent based on the transmission parameters indicated in the UL Grant.

[0064] (12) The terminal assumes that the number of times Msg3 is sent is equal to the number of times Msg1 is sent. That is, when the terminal repeatedly sends Msg1, Msg3 is also repeatedly sent, and the number of times it is sent is the same as the number of times Msg1 is sent.

[0065] (13) The terminal determines the number of times Msg3 is sent based on the value of RA-RNTI, and RA-RNTI is used to monitor Msg2.

[0066] In one implementation, if the network-side device (such as a base station) successfully detects Msg1 before the Msg1 repetition ends, then the terminal can calculate RA-RNTI according to the Msg1 time-frequency resource parameters corresponding to the successfully detected Msg1.

[0067] Of course, if the terminal sends multiple Msg1s, the base station can calculate multiple RA-RNTIs based on the Msg1 time-frequency resource parameters corresponding to the multiple Msg1s. In this case, it can be configured through protocol predefinition or system messages: different RA-RNTIs correspond to different numbers of Msg3 repetitions. For example, the first RA-RNTI corresponding to the first Msg1 corresponds to a single Msg3 transmission; the second RA-RNTI corresponding to the second Msg1 corresponds to the Msg3 being transmitted twice, and so on.

[0068] Alternatively, if the terminal uses multiple RA-RNTIs to monitor Msg2, the terminal can determine the number of times Msg3 is sent based on the value of the target RA-RNTI; wherein the target RA-RNTI is the RA-RNTI that successfully monitored Msg2 among the multiple RA-RNTIs, and the multiple RA-RNTIs correspond one-to-one with the first message Msg1 that was repeatedly sent. That is, the terminal uses multiple RA-RNTIs to monitor Msg2, and the RA-RNTI used when monitoring Msg2 is successful determines the number of times Msg3 is repeated.

[0069] (14) The terminal determines the number of times Msg3 is transmitted based on the first downlink control information, which includes TC-RNTI scrambled DCI 0-0. The first downlink control information may be sent to the terminal by the network-side device when Msg3 transmission fails to be scheduled via Msg2, to enable rescheduling of Msg3 retransmission and simultaneously indicate the retransmission parameters of Msg3, such as the number of transmissions and / or transmission beam.

[0070] That is, after the initial transmission of Msg3, the terminal can listen to the TC-RNTI scrambled DCI 0-0 to determine the number of times Msg3 will be retransmitted. For example, the number of times Msg3 will be retransmitted can be determined based on the indication information in the MCS field, New Data Indicator (NDI) field, HARQ process number field, etc. in DCI 0-0.

[0071] It should be noted that when the terminal adopts the method for determining the number of transmissions given in (11)-(14) above, the specific method of determination can be determined by the protocol agreement, high-level configuration or network-side device configuration, and there is no restriction here.

[0072] Furthermore, the step of the terminal determining the transmission beam of Msg3 may include at least one of the following (21)-(22).

[0073] (21) The terminal determines the transmission beam of Msg3 during initial transmission based on the first reference beam. The first reference beam is determined by the terminal based on the interpretation result of the UL Grant included in the monitored Msg2, the value of RA-RNTI, or the protocol default rule.

[0074] The implementation process of the first interpretation method used by the terminal to interpret the UL Grant included in the monitored Msg2 can be referred to the relevant description in (11) above, and will not be repeated here.

[0075] Of course, unlike the determination of the number of transmissions mentioned above, if the terminal interprets the UL Grant included in Msg2 as being in the first UL grant format or the second UL grant format, then the terminal can further determine the transmission beam of Msg3 based on the value of RA-RNTI, the default rules of the protocol, etc.

[0076] If the terminal interprets the UL Grant included in Msg2 as being in the format of a third UL grant, then the terminal can determine the transmission beam for the initial transmission of Msg3 based on the transmission beam indicated in the UL Grant.

[0077] In addition, the process by which the terminal determines the transmission beam of Msg3 during initial transmission based on the value of RA-RNTI may include: the terminal first determines the corresponding Msg1 or the SSB associated with the corresponding Msg1 based on the value of RA-RNTI, and then uses the transmission beam of Msg1 or the reception beam of the SSB as the transmission beam of Msg3.

[0078] The terminal determining the first reference beam according to the protocol rules may include: by default, the first reference beam is the receiving beam of Msg2, the transmitting beam of Msg1, the receiving beam of SSB, etc. The specific type of beam used as the first reference beam is configured by the protocol predefined or system message, and is not restricted here.

[0079] Based on the foregoing description, as a possible implementation, the first reference beam given in this embodiment may include at least one of the following (211)-(213).

[0080] (211) The transmission beam of Msg1. For example, the transmission beam of Msg3 during initial transmission can be the transmission beam of Msg1, but this embodiment does not impose any restrictions on this.

[0081] (212) The receiving beam of Msg2. For example, the transmitting beam of Msg3 during initial transmission can be the receiving beam of Msg2, but this embodiment does not impose any restrictions on this.

[0082] (213) The receiving beam of the Synchronization Signal and PBCH block (SSB), which is associated with Msg1. For example, the transmitting beam of Msg3 during initial transmission can be the receiving beam of the SSB, but this embodiment does not impose any restrictions on this.

[0083] Based on this, as an implementation method, when the UL Grant format corresponding to the UL Grant interpretation method is the first UL grant format or the second UL grant format, the step of the terminal determining the transmission beam during the initial transmission of Msg3 according to the first reference beam may include any one of the following (214)-(215).

[0084] (214) The terminal determines the transmission beam of Msg3 based on the receiving beam of Msg2, wherein Msg3 is a single transmission, or Msg3 is a multiple repeated transmission but using a single beam.

[0085] In other words, if Msg2 instructs Msg3 to be transmitted only once, or if the terminal determines, according to the protocol or the first system message configuration (e.g., the cell does not support repeated transmission of Msg3), that Msg3 will be repeatedly transmitted but using a single beam, then the terminal can determine the transmission beam of Msg3 based on the reception beam of Msg2. That is, the reception beam of Msg2 and the transmission beam of Msg3 have the same spatial domain filtering property.

[0086] (215) The terminal determines the first reference beam based on the value of RA-RNTI, and determines the transmit beam of Msg3 based on the first reference beam. The first reference beam includes the receive beam of Msg2 or the receive beam of SSB.

[0087] In other words, if the terminal determines the corresponding Msg1 or the SSB associated with the corresponding Msg1 based on the value of RA-RNTI, and uses the transmit beam of the Msg1 or the receive beam of the SSB as the transmit beam of Msg3. For example, if the terminal transmits N Msg1s, and the N Msg1s are associated with N different SSBs, then the terminal receives Msg2, and determines the corresponding Msg1 from the N Msg1s or one of the reference beams (the transmit beam of Msg1 or the receive beam of the SSB) from the N associated SSBs based on the value of RA-RNTI as the beam associated with the transmit beam of Msg3 PUSCH.

[0088] (22) The terminal determines the transmission beam for Msg3 retransmission based on the second reference beam. The second reference beam is determined by the terminal based on the first downlink control information or the protocol default rule. The first downlink control information includes DCI 0-0 scrambled by TC-RNTI.

[0089] When the terminal determines the second reference beam based on the first downlink control information, the first downlink control information may be sent to the terminal by the network-side device when the initial transmission of Msg3 fails to be scheduled through Msg2, so as to realize the scheduling of Msg3 retransmission and indicate the retransmission parameters of Msg3, such as the number of transmissions and / or the transmission beam.

[0090] In other words, after the initial transmission of Msg3, the terminal listens to the TC-RNTI scrambled DCI 0-0 to determine the transmission beam during Msg3 retransmission. For example, the terminal can determine the transmission beam during Msg3 retransmission through fields in DCI 0-0, such as the 5-bit MCS field, the 1-bit NDI field, the 4-bit Hybrid Automatic Repeat Request Process Number (HARQ process number) field, or some or a combination of the above fields can be used to indicate the transmission beam.

[0091] Alternatively, when the terminal determines the transmission beam for Msg3 retransmission using the first control information, it may maintain the same transmission beam as the initial Msg3 transmission and retransmit Msg3. However, the DCI 0-0 may additionally indicate the number of retransmissions of Msg3.

[0092] Alternatively, the terminal can change the transmission beam and retransmission count for Msg3 retransmissions. The retransmission count is indicated using the Rel-17 Msg3 retransmission count indication method, and the transmission beam for Msg3 retransmissions is indicated by one or more combinations of fields such as the 5-bit MCS field, the 1-bit NDI field, and the 4-bit HARQ process number field.

[0093] Of course, as one implementation, the second reference beam includes at least one of the following (221)-(224).

[0094] (221) The transmission beam of Msg1. For example, the transmission beam of Msg3 during retransmission can be the transmission beam of Msg1, but this embodiment does not impose any restrictions on this.

[0095] (222) The receiving beam of Msg2 or the first control information. For example, the transmitting beam during Msg3 retransmission can be the receiving beam of Msg2 or the first control information. This embodiment does not impose any restrictions on this.

[0096] (223) The receiving beam of the SSB, which is associated with the Msg1. For example, the transmitting beam of the Msg3 during retransmission can be the receiving beam of the SSB, but this embodiment does not impose any restrictions on this.

[0097] (224) The transmission beam during the initial transmission of Msg3. The transmission beam during the initial transmission of Msg3 can be determined according to the determination method given in (21) above, and will not be repeated here.

[0098] As another implementation, when the UL Grant format corresponding to the UL Grant interpretation method is a first UL grant format or a second UL grant format, the step of the terminal determining the transmission beam of Msg3 further includes: the terminal determining the transmission beam used for repeated transmission of Msg3 according to the transmission beam pattern; wherein the transmission beam pattern includes L transmission beams, and L is an integer greater than 1.

[0099] That is, if Msg2 instructs Msg3 to be transmitted repeatedly and Msg3 uses multiple transmission beams for repeated transmission, the terminal can determine the order of the multiple transmission beams when Msg3 is transmitted repeatedly before transmitting Msg3. The transmission beam pattern can be a fixed pattern that corresponds one-to-one with the transmission beam order of Msg1, or several candidate transmission beam patterns can be configured by system messages.

[0100] Optionally, the transmission beam pattern is a sequence of L transmission beams, where the number L can be equal to the number of transmission beams repeatedly transmitted by Msg1. That is, each transmission beam in the transmission beam pattern corresponds to a transmission beam of Msg1 or an SSB reception beam. Furthermore, the order of the transmission beams in the transmission beam pattern is the same as the order of the transmission beams repeatedly transmitted by Msg1.

[0101] In this embodiment, the transmission beam pattern can be implemented by protocol agreement, higher layer configuration, or network side configuration (such as through system messages), and there are no restrictions on this.

[0102] Based on this, in one implementation, when Msg3 is repeatedly transmitted, the transmission beam of the first Msg3 can be determined first, and then the transmission beam of each Msg3PUSCH can be determined cyclically according to the beam order in the transmission beam pattern. In this case, the step of the terminal determining the transmission beam for the repeated transmission of Msg3 according to the transmission beam pattern may include any one of the following (31)-(33):

[0103] (31) When L is greater than M, the terminal determines the M transmission beams when Msg3 is repeatedly transmitted, starting from the first beam in the transmission beam pattern. The first beam and its position in the transmission beam pattern are determined according to the receiving beam of Msg2 or the value of RA-RNTI.

[0104] Where M is the number of times Msg3 is sent, and L and M are both integers greater than or equal to 1.

[0105] For example, if the length of the transmission beam pattern is L and the number of Msg3 transmissions is M, where L>M, then the terminal determines the M transmission beams of Msg3 starting from the first beam of the transmission beam pattern.

[0106] Alternatively, if the length of the transmit beam pattern is L and the number of Msg3 transmissions is M, where L>M, the starting position of the transmit beam of Msg3 during its first transmission in the transmit beam pattern can be determined according to the protocol definition rules (the same as the receive beam of Msg2 or according to the RA-RNTI instruction). Then, based on the starting position of the transmit beam of Msg3 during its first transmission in the transmit beam pattern, the transmit beams of the subsequent M-1 retransmitted Msg3s can be determined.

[0107] (32) When L is equal to M, the terminal determines the transmission beams for M Msg3s starting from the first transmission beam in the transmission beam pattern, where the first transmission beam is the starting transmission beam when M Msg3s are repeatedly transmitted.

[0108] Here, M is the number of times Msg3 is transmitted, and both L and M are integers greater than or equal to 1.

[0109] Optionally, the starting transmission beam when Msg3 is repeatedly transmitted is determined according to the reception beam of Msg2 or the value of RA - RLTI.

[0110] Exemplarily, if the length of the transmission beam pattern is L, the number of times Msg3 is transmitted is M, and L = M, the transmission beams for M Msg3s are determined according to the transmission beam pattern. The starting transmission beam can be the first beam in the transmission beam pattern or a beam determined according to the protocol definition rule (the same as the reception beam of Msg2 or as indicated by RA - RNTI).

[0111] (33) When L is less than M, M transmission beams when Msg3 is repeatedly transmitted are determined from the transmission beam pattern in a cyclic manner; where M is the number of times Msg3 is transmitted, and both L and M are integers greater than or equal to 1.

[0112] Exemplarily, if the length of the transmission beam pattern is L and the number of times Msg3 is transmitted is M, and L < M, the transmission beams for Msg3 can be determined in a cyclic manner, that is, if the next transmission beam after the last transmission beam in the transmission beam pattern is the first transmission beam in the transmission beam pattern.

[0113] Optionally, in addition to the foregoing method, the M Msg3s transmitted continuously multiple times can also use the same transmission beam, such as the initial transmission beam, etc.

[0114] In one implementation, when the terminal determines the transmission beams when Msg3 is repeatedly transmitted based on the transmission beam pattern, it can further determine the order of the transmission beams when Msg3 is repeatedly transmitted according to the beam order in the transmission beam pattern. That is, the order of the transmission beams when Msg3 is repeatedly transmitted is determined according to the beam order in the transmission beam pattern.

[0115] For example, assuming that the repeatedly transmitted Msg1 is associated with a single SSB, then after the terminal repeatedly transmits Msg1, it only needs to determine the number of transmissions of Msg3, and does not need to determine the transmission beam of Msg3 PUSCH. The method by which the terminal determines the number of transmissions of Msg3 can refer to the relevant description of determining the number of transmissions in S410 above. To avoid repetition, it will not be repeated here.

[0116] In this embodiment, when the terminal repeatedly sends Msg1 for random access, it can determine the interpretation method of the UL grant in Msg2 and the transmission parameters of Msg3 through protocol agreement or dynamic indication. This not only enhances the coverage performance of uplink channels such as Msg1 and Msg3, but also ensures that the UL grant and DCI 0-0 overhead remain unchanged, ensuring that the transmission parameters of Msg3 are unambiguous on both the base station and the terminal, thereby ensuring the reliability of the random access process.

[0117] like Figure 4 The diagram shown illustrates a flowchart of a random access method 400 provided in an exemplary embodiment of this application. This method 400 can be executed by, but is not limited to, a terminal, specifically by hardware and / or software installed in the terminal. In this embodiment, the method 400 may include at least the following steps.

[0118] S410, the terminal receives second system information sent by the network-side device.

[0119] The second system information (System Information Block, SIB) may be the same as or different from the aforementioned first system message, and no restriction is imposed here.

[0120] In this embodiment, the second system information may include at least first configuration information and second configuration information. The first configuration information is used for the repeated transmission of Msg1, such as relevant information indicating the repeated transmission of Msg1. The second configuration information is used for the transmission of Msg3, such as relevant information indicating the repeated transmission of Msg1.

[0121] In one implementation, the first configuration information may include at least one of the following (41)-(44).

[0122] (41) Whether the transmission beam corresponding to Msg1 is a single beam or multiple beams. That is, the terminal can repeatedly transmit Msg1 based on a single transmission beam or based on multiple transmission beams.

[0123] (42) Whether Msg1 is associated with a single SSB or multiple SSBs. That is, when the terminal repeatedly transmits Msg1, whether it is associated with a single SSB or multiple SSBs.

[0124] (43) Whether the first cell supports repeated transmission of Msg3, wherein the first cell is the serving cell of the terminal.

[0125] (44) The interpretation of the UL grant.

[0126] For example, the second system message can instruct the terminal to interpret the UL grant in Msg2 using the first UL grant format, the second UL grant format, or the third UL grant format.

[0127] In addition, the second system message may also indicate whether to perform Msg1 repeated transmission, the candidate number set for the number of Msg3 transmissions, etc., wherein the candidate number set may be different from the candidate number set for Msg3 repeated transmissions defined in Rel-17.

[0128] The second configuration information includes at least one of the following (51)-(52).

[0129] (51) Whether the transmitting beam corresponding to Msg3 is a single beam or multiple beams.

[0130] (52) The transmission beam pattern corresponding to Msg3.

[0131] It should be noted that, in this embodiment, in addition to indicating the aforementioned first configuration information and second configuration information through the second system message, as a possible implementation, the first configuration information and / or the second configuration information can also be implemented through protocol agreement or terminal default, etc.

[0132] For example, assuming that the first configuration information does not include information on whether the first cell supports repeated transmission of Msg3, the terminal can determine whether the first cell supports repeated transmission of Msg3 by default or according to the protocol agreement.

[0133] S420, the terminal determines the predetermined information based on the first configuration information and / or the second configuration information.

[0134] The predetermined information includes at least one of the following (61)-(63).

[0135] (61) Whether the first cell supports repeated transmission of Msg1, wherein the first cell is the serving cell of the terminal.

[0136] In one implementation, if the terminal determines that the first cell supports repeated transmission of Msg1, it can perform random access based on repeated transmission of Msg1.

[0137] (62) Does the first cell support repeated transmission of Msg3?

[0138] (63) The relevant parameters when Msg3 is repeatedly sent; in one implementation, the relevant parameters when Msg3 is repeatedly sent include at least one of the following (631)-(635).

[0139] (631) A first set, which includes at least one Msg1 time-frequency resource set.

[0140] (632) A second set, which includes at least one Msg1 pilot.

[0141] (633) A third set, which includes at least one Msg1 repeated transmission count.

[0142] (634) The fourth set, which includes at least one Msg3 repeated transmission count.

[0143] (635) Power ramping step value.

[0144] S430: The terminal performs random access by repeatedly sending Msg1.

[0145] S440, the terminal determines the transmission parameters for Msg3.

[0146] The transmission parameters include the number of transmissions and / or the transmission beam.

[0147] It is understood that the implementation process of S430 and S440 can refer to the relevant descriptions in method embodiments 200 and / or 300, and achieve the same or corresponding technical effects. To avoid repetition, they will not be described again here.

[0148] like Figure 5 The diagram shown illustrates a flowchart of a random access method 500 provided in an exemplary embodiment of this application. This method 500 can be executed by, but is not limited to, a network-side device, specifically by hardware and / or software installed in the network-side device. In this embodiment, the method 500 may include at least the following steps.

[0149] S510, the network-side device receives the first message Msg1.

[0150] Msg1 is sent by the terminal in the form of repeated transmission.

[0151] In one implementation, after the network-side device receives the first message Msg1, the method further includes: the network-side device sending a second message Msg2 to the terminal. The Msg2 message is related to the determination of the transmission parameters of the third message Msg3. For example, Msg2 may indicate the transmission parameters of Msg3, the interpretation method of the UL grant in Msg2, the value of RA-RNTI, etc., so that the terminal can determine the transmission parameters of Msg3 based on one or more of the transmission parameters of Msg3 indicated by Msg2, the interpretation method of the UL grant in Msg2, and the value of RA-RNTI. The transmission parameters include the number of transmissions and / or the transmission beam.

[0152] In one implementation, Msg2 includes a first field for indicating the interpretation method of UL Grant, the first field including fields in the sub-protocol data unit (sub PDU) included in Msg2 and fields in the UL grant included in Msg2.

[0153] In one implementation, the fields in the UL grant include at least one of the following: Channel State Information Request (CSI) field, Modulation and Coding Scheme (MCS) field, and Transmit Power Control (TPC) field.

[0154] In one implementation, after sending the second message Msg2 to the terminal, the method further includes: upon receiving the initial transmission of Msg3 from the terminal, the network-side device sends first downlink control information to the terminal; wherein the first downlink control information includes DCI 0-0 scrambled by TC-RNTI, and the first downlink control information is related to the transmission parameters when Msg3 is retransmitted.

[0155] In one implementation, before the network-side device receives the first message Msg1 repeatedly sent by the terminal, the method further includes: the network-side device sending second system information to the terminal; wherein the second system information includes first configuration information and second configuration information, the first configuration information is used for the repeated sending of Msg1, and the second configuration information is used for the sending of Msg3.

[0156] In one implementation, the first configuration information includes at least one of the following: whether the transmission beam corresponding to Msg1 is a single beam or multiple beams; whether Msg1 is associated with a single SSB or multiple SSBs; whether the first cell supports repeated transmission of Msg3, wherein the first cell is the serving cell of the terminal; and the interpretation method of the UL grant.

[0157] In one implementation, the second configuration information includes at least one of the following: whether the transmission beam corresponding to Msg3 is a single beam or multiple beams; and the first transmission beam pattern corresponding to Msg3.

[0158] It is understood that the implementation process of the aforementioned implementation methods given in this method embodiment 500 can refer to the relevant descriptions in method embodiments 200-400 and achieve the same or corresponding technical effects. To avoid repetition, it will not be described again here.

[0159] It should be noted that the random access method 200-500 provided in this application embodiment can be executed by a random access device, or by a control module in the random access device for executing the random access method. This application embodiment uses the execution of the random access method by a random access device as an example to illustrate the random access device provided in this application embodiment.

[0160] like Figure 6a The diagram shown is a schematic representation of a random access device 600 provided in an exemplary embodiment of this application. The device 600 includes a first transmission module for performing random access by repeatedly sending a first message Msg1.

[0161] Optionally, the device 600 further includes a configuration module for configuring relevant parameters when Msg1 is repeatedly sent.

[0162] Optional, such as Figure 6b As shown, the device 600 further includes a determining module 620, which determines the transmission parameters of the third message Msg3; wherein the transmission parameters include the number of transmissions and / or the transmission beam.

[0163] Optionally, the step of determining the number of times Msg3 is transmitted by the determining module 620 includes at least one of the following: determining the number of times Msg3 is transmitted based on the interpretation result of the uplink grant (UL Grant) included in the monitored second message Msg2; assuming that the number of times Msg3 is transmitted is equal to the number of times Msg1 is transmitted; determining the number of times Msg3 is transmitted based on the value of the random access-radio temporary identifier (RA-RNTI), wherein the RA-RNTI is used to monitor Msg2; and determining the number of times Msg3 is transmitted based on first downlink control information, wherein the first downlink control information includes DCI0-0 scrambled with TC-RNTI.

[0164] Optionally, the step of determining the number of times Msg3 is sent based on the value of RA-RNTI by the determining module 620 includes: when multiple RA-RNTIs are used to monitor Msg2, determining the number of times Msg3 is sent based on the value of the target RA-RNTI; wherein the target RA-RNTI is the RA-RNTI that successfully monitors Msg2 among the multiple RA-RNTIs, and the multiple RA-RNTIs correspond one-to-one with the repeatedly sent first message Msg1.

[0165] Optionally, the step of determining the transmission beam of Msg3 by the determining module 620 includes at least one of the following: determining the transmission beam of Msg3 during initial transmission based on a first reference beam, wherein the first reference beam is determined based on the interpretation result of the UL Grant included in the monitored Msg2, the value of RA-RNTI, or the protocol default rule; determining the transmission beam of Msg3 during retransmission based on a second reference beam, wherein the second reference beam is determined based on first downlink control information or the protocol default rule, wherein the first downlink control information includes DCI 0-0 scrambled by TC-RNTI.

[0166] Optionally, the first reference beam includes at least one of the following: the transmit beam of Msg1; the receive beam of Msg2; and the receive beam of a synchronization signal block SSB associated with Msg1.

[0167] Optionally, the second reference beam includes at least one of the following: the transmit beam of Msg1;

[0168] The receiving beam of Msg2; the receiving beam of the synchronization signal block SSB, which is associated with Msg1; and the transmitting beam of Msg3 during initial transmission.

[0169] Optionally, the interpretation result of the UL Grant included in Msg2 is obtained by the terminal interpreting the UL Grant in Msg2 according to the first interpretation method. The first interpretation method includes at least one of the following: UL Grant interpretation method indicated by the first system information; default UL Grant interpretation method; UL Grant interpretation method indicated by the first field, wherein the first field includes any one of the fields in the sub-protocol data unit (sub PDU) included in Msg2, the fields in the UL grant included in Msg2, and the fields in the second downlink control information, wherein the second downlink control information is RA-RNTI scrambled DCI 1-0.

[0170] Optionally, the fields in the UL grant include at least one of the following: Channel State Information Request (CSI) field, Modulation and Coding Scheme (MCS) field, and Transmit Power Control (TPC) field.

[0171] Optionally, the UL Grant format corresponding to the UL Grant interpretation method includes any one of the following: a first UL grant format, wherein the UL grant corresponding to the first UL grant format indicates the number of times Msg3 is transmitted, but cannot indicate the transmission beam of Msg3; a second UL grant format, wherein the UL grant corresponding to the second UL grant format cannot indicate the number of times Msg3 is transmitted and the transmission beam; a third UL grant format, wherein the UL grant corresponding to the third UL grant format indicates the number of times Msg3 is transmitted and the transmission beam.

[0172] Optionally, when the UL Grant format corresponding to the UL Grant interpretation method is a first UL grant format or a second UL grant format, the step of determining the transmission beam of the initial transmission of Msg3 based on the first reference beam by the determining module 620 includes any one of the following: determining the transmission beam of Msg3 based on the receiving beam of Msg2; determining the first reference beam based on the value of RA-RNTI; and determining the transmission beam of Msg3 based on the first reference beam, wherein the first reference beam includes the receiving beam of Msg2 or the receiving beam of SSB; wherein Msg3 is a single transmission, or Msg3 is multiple repeated transmissions using a single beam.

[0173] Optionally, when the UL Grant format corresponding to the UL Grant interpretation method is a first UL grant format or a second UL grant format, the step of determining the transmission beam of Msg3 by the determining module 620 further includes: the determining module 620 determining the transmission beam used for repeated transmission of Msg3 according to the transmission beam pattern; wherein the transmission beam pattern includes L transmission beams, and L is an integer greater than 1.

[0174] Optionally, the order of the transmission beams included in the transmission beam pattern is the same as the order of the transmission beams in the repeated transmission of Msg1.

[0175] Optionally, the step of determining the transmission beams for repeated transmission of Msg3 by the determining module 620 according to the transmission beam pattern includes any one of the following: when L is greater than M, the determining module 620 determines M transmission beams for repeated transmission of Msg3 starting from the first beam in the transmission beam pattern, wherein the first beam and its position in the transmission beam pattern are determined according to the receiving beam of Msg2 or the value of RA-RNTI; when L is equal to M, the determining module 620 determines M transmission beams for Msg3 starting from the first transmission beam in the transmission beam pattern, wherein the first transmission beam is the starting transmission beam for repeated transmission of Msg3; when L is less than M, the M transmission beams for repeated transmission of Msg3 are determined from the transmission beam pattern according to a cyclic method; wherein M is the number of transmissions of Msg3, and L and M are both integers greater than or equal to 1.

[0176] Optionally, the starting transmission beam when Msg3 is repeatedly transmitted is determined based on the receiving beam of Msg2 or the value of RA-RNTI.

[0177] Optionally, the order of the transmission beams when Msg3 is repeatedly transmitted is determined according to the beam order in the transmission beam pattern.

[0178] Optionally, the device 600 further includes: a first transmission module 610, configured to receive second system information sent by a network-side device when random access is performed by repeatedly sending the first message Msg1, the second system information including first configuration information and second configuration information, the first configuration information being used for the repeated sending of Msg1, and the second configuration information being used for the sending of Msg3.

[0179] Optionally, the first configuration information includes at least one of the following: whether the transmission beam corresponding to Msg1 is a single beam or multiple beams; whether Msg1 is associated with a single SSB or multiple SSBs; whether the first cell supports repeated transmission of Msg3, wherein the first cell is the serving cell of the terminal; and the interpretation method of the UL grant.

[0180] Optionally, the second configuration information includes at least one of the following: whether the transmit beam corresponding to Msg3 is a single beam or multiple beams; and the first transmit beam pattern corresponding to Msg3.

[0181] Optionally, the determining module 620 is further configured to determine at least one of the following based on the first configuration information and / or the second configuration information: whether the first cell supports repeated transmission of Msg1; whether the first cell supports repeated transmission of Msg3; and the relevant parameters when Msg3 is repeatedly transmitted; wherein the first cell is the serving cell of the terminal.

[0182] Optionally, the relevant parameters for repeated Msg3 transmission include at least one of the following: a first set, which includes at least one Msg1 time-frequency resource set; a second set, which includes at least one Msg1 pilot; a third set, which includes at least one Msg1 repeated transmission count; a fourth set, which includes at least one Msg3 repeated transmission count; and a transmission power step value.

[0183] The random access device 600 in this application embodiment can be a device, a device or electronic device with an operating system, or a component, integrated circuit, or chip in a terminal. This device or electronic device can be a mobile terminal or a non-mobile terminal. For example, a mobile terminal can include, but is not limited to, the types of terminals 11 listed above, while a non-mobile terminal can be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not specifically limit the type of terminal.

[0184] The random access device 600 provided in this application embodiment can achieve... Figures 2a to 4 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0185] like Figure 7 The diagram shown is a structural schematic of a random access device 700 provided in an exemplary embodiment of this application. The device 700 includes: a second transmission module 710, used to receive a first message Msg1; wherein, Msg1 is sent by the terminal in the form of repeated transmission.

[0186] Optionally, the second transmission module 710 is further configured to send a second message Msg2 to the terminal; wherein the Msg2 is related to the determination of the transmission parameters of the third message Msg3, and the transmission parameters include the number of transmissions and / or the transmission beam.

[0187] Optionally, Msg2 includes a first field for indicating the interpretation method of the UL Grant, the first field including fields in the sub-protocol data unit (sub PDU) included in Msg2 and fields in the UL grant included in Msg2.

[0188] Optionally, the fields in the UL grant include at least one of the following: Channel State Information Request (CSI) field, Modulation and Coding Scheme (MCS) field, and Transmit Power Control (TPC) field.

[0189] Optionally, the second transmission module 710 is further configured to send first downlink control information to the terminal upon receiving the initial transmission of Msg3 from the terminal; wherein the first downlink control information includes DCI 0-0 scrambled by TC-RNTI, and the first downlink control information is related to the transmission parameters when the Msg3 is retransmitted.

[0190] Optionally, the second transmission module 710 is further configured to send second system information to the terminal; wherein the second system information includes first configuration information and second configuration information, the first configuration information is used for repeated transmission of Msg1, and the second configuration information is used for transmission of Msg3.

[0191] Optionally, the first configuration information includes at least one of the following: whether the transmission beam corresponding to Msg1 is a single beam or multiple beams; whether Msg1 is associated with a single SSB or multiple SSBs; whether the first cell supports repeated transmission of Msg3, wherein the first cell is the serving cell of the terminal; and the interpretation method of the UL grant.

[0192] Optionally, the second configuration information includes at least one of the following: whether the transmit beam corresponding to Msg3 is a single beam or multiple beams; and the first transmit beam pattern corresponding to Msg3.

[0193] The random access device 700 in this application embodiment can be a device, a device with an operating system, or a network-side device. It can also be a component, integrated circuit, or chip in a network-side device. The network-side device can include, but is not limited to, the types of network-side devices 12 listed above. This application embodiment does not specifically limit it.

[0194] The random access device 700 provided in this application embodiment can achieve... Figure 5 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0195] This 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 programs or instructions to implement the steps of the method described in method embodiments 200-400. This terminal embodiment corresponds to the above-described terminal-side method embodiments, and all implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and achieve the same technical effect. Specifically, Figure 8 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0196] The terminal 800 includes, but is not limited to, at least some of the following components: radio frequency unit 801, network module 802, audio output unit 803, input unit 804, sensor 805, display unit 806, user input unit 807, interface unit 808, memory 809, and processor 810.

[0197] Those skilled in the art will understand that the terminal 800 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 810 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 8 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0198] It should be understood that, in this embodiment, the input unit 804 may include a graphics processing unit (GPU) 1041 and a microphone 8042. The GPU 8041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 806 may include a display panel 8061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 807 includes a touch panel 8071 and other input devices 8072. The touch panel 8071 is also called a touch screen. The touch panel 8071 may include a touch detection device and a touch controller. Other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, power buttons, etc.), a trackball, a mouse, and a joystick, which will not be described in detail here.

[0199] In this embodiment, the radio frequency unit 801 receives downlink data from the network-side device and processes it for the processor 810; additionally, it sends uplink data to the network-side device. Typically, the radio frequency unit 801 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0200] The memory 809 can be used to store software programs or instructions and various data. The memory 809 may primarily include a program or instruction storage area and a data storage area. The program or instruction storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 809 may include high-speed random access memory and non-volatile memory, which may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. For example, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0201] Processor 810 may include one or more processing units; optionally, processor 810 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications or instructions, and the modem processor mainly handles wireless communication, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 810.

[0202] The radio frequency unit 801 is used for random access by repeatedly sending the first message Msg1.

[0203] Processor 810 is used to determine the transmission parameters of the third message Msg3; wherein the transmission parameters include the number of transmissions and / or the transmission beam.

[0204] Optionally, the step of the processor 810 in determining the number of times Msg3 is transmitted includes at least one of the following: determining the number of times Msg3 is transmitted based on the interpretation result of the uplink grant (UL Grant) included in the monitored second message Msg2; assuming that the number of times Msg3 is transmitted is equal to the number of times Msg1 is transmitted; determining the number of times Msg3 is transmitted based on the value of the random access-radio temporary identifier (RA-RNTI), wherein the RA-RNTI is used to monitor Msg2; and determining the number of times Msg3 is transmitted based on first downlink control information, wherein the first downlink control information includes DCI 0-0 scrambled with TC-RNTI.

[0205] Optionally, the step of the processor 810 determining the number of times Msg3 is sent based on the value of RA-RNTI includes: when multiple RA-RNTIs are used to monitor Msg2, determining the number of times Msg3 is sent based on the value of the target RA-RNTI; wherein the target RA-RNTI is the RA-RNTI that successfully monitors Msg2 among the multiple RA-RNTIs, and the multiple RA-RNTIs correspond one-to-one with the repeatedly sent first message Msg1.

[0206] Optionally, the step of the processor 810 in determining the transmission beam of Msg3 includes at least one of the following: determining the transmission beam of Msg3 during initial transmission based on a first reference beam, wherein the first reference beam is determined based on the interpretation result of the UL Grant included in the monitored Msg2, the value of RA-RNTI, or the protocol default rule; determining the transmission beam of Msg3 during retransmission based on a second reference beam, wherein the second reference beam is determined based on first downlink control information or the protocol default rule, wherein the first downlink control information includes DCI 0-0 scrambled by TC-RNTI.

[0207] Optionally, the first reference beam includes at least one of the following: the transmit beam of Msg1; the receive beam of Msg2; and the receive beam of a synchronization signal block SSB associated with Msg1.

[0208] Optionally, the second reference beam includes at least one of the following: the transmit beam of Msg1; the receive beam of Msg2; the receive beam of the synchronization signal block SSB, which is associated with Msg1; and the transmit beam of Msg3 during initial transmission.

[0209] Optionally, the interpretation result of the UL Grant included in Msg2 is obtained by the terminal interpreting the UL Grant in Msg2 according to the first interpretation method. The first interpretation method includes at least one of the following: UL Grant interpretation method indicated by the first system information; default UL Grant interpretation method; UL Grant interpretation method indicated by the first field, wherein the first field includes any one of the fields in the sub-protocol data unit (sub PDU) included in Msg2, the fields in the UL grant included in Msg2, and the fields in the second downlink control information, wherein the second downlink control information is RA-RNTI scrambled DCI 1-0.

[0210] Optionally, the fields in the UL grant include at least one of the following: Channel State Information Request (CSI) field, Modulation and Coding Scheme (MCS) field, and Transmit Power Control (TPC) field.

[0211] Optionally, the UL Grant format corresponding to the UL Grant interpretation method includes any one of the following: a first UL grant format, wherein the UL grant corresponding to the first UL grant format indicates the number of times Msg3 is transmitted, but cannot indicate the transmission beam of Msg3; a second UL grant format, wherein the UL grant corresponding to the second UL grant format cannot indicate the number of times Msg3 is transmitted and the transmission beam; a third UL grant format, wherein the UL grant corresponding to the third UL grant format indicates the number of times Msg3 is transmitted and the transmission beam.

[0212] Optionally, when the UL Grant format corresponding to the UL Grant interpretation method is a first UL grant format or a second UL grant format, the step of the processor 810 determining the transmission beam of the Msg3 during initial transmission based on the first reference beam includes any one of the following: determining the transmission beam of the Msg3 based on the receiving beam of the Msg2; determining the first reference beam based on the value of RA-RNTI; and determining the transmission beam of the Msg3 based on the first reference beam, wherein the first reference beam includes the receiving beam of the Msg2 or the receiving beam of the SSB; wherein the Msg3 is a single transmission, or the Msg3 is multiple repeated transmissions using a single beam.

[0213] Optionally, when the UL Grant format corresponding to the UL Grant interpretation method is a first UL grant format or a second UL grant format, the step of the processor 810 determining the transmission beam of Msg3 further includes: the processor 810 determining the transmission beam used for repeated transmission of Msg3 according to the transmission beam pattern; wherein the transmission beam pattern includes L transmission beams, and L is an integer greater than 1.

[0214] Optionally, the order of the transmission beams included in the transmission beam pattern is the same as the order of the transmission beams in the repeated transmission of Msg1.

[0215] Optionally, the step of the processor 810 determining the transmission beams for repeated transmission of Msg3 according to the transmission beam pattern includes any one of the following: when L is greater than M, the processor 810 determines M transmission beams for repeated transmission of Msg3 starting from the first beam in the transmission beam pattern, wherein the first beam and its position in the transmission beam pattern are determined according to the receiving beam of Msg2 or the value of RA-RNTI; when L is equal to M, the processor 810 determines M transmission beams for Msg3 starting from the first transmission beam in the transmission beam pattern, wherein the first transmission beam is the starting transmission beam for repeated transmission of Msg3; when L is less than M, the M transmission beams for repeated transmission of Msg3 are determined from the transmission beam pattern in a cyclic manner; wherein M is the number of times Msg3 is transmitted, and L and M are both integers greater than or equal to 1.

[0216] Optionally, the starting transmission beam when Msg3 is repeatedly transmitted is determined based on the receiving beam of Msg2 or the value of RA-RNTI.

[0217] Optionally, the order of the transmission beams when Msg3 is repeatedly transmitted is determined according to the beam order in the transmission beam pattern.

[0218] Optionally, the radio frequency unit 801 is configured to receive second system information sent by a network-side device when random access is performed by repeatedly sending the first message Msg1. The second system information includes first configuration information and second configuration information. The first configuration information is used for the repeated transmission of Msg1, and the second configuration information is used for the transmission of Msg3.

[0219] Optionally, the first configuration information includes at least one of the following: whether the transmission beam corresponding to Msg1 is a single beam or multiple beams; whether Msg1 is associated with a single SSB or multiple SSBs; whether the first cell supports repeated transmission of Msg3, wherein the first cell is the serving cell of the terminal; and the interpretation method of the UL grant.

[0220] Optionally, the second configuration information includes at least one of the following: whether the transmit beam corresponding to Msg3 is a single beam or multiple beams; and the first transmit beam pattern corresponding to Msg3.

[0221] Optionally, the processor 810 is further configured to determine at least one of the following based on the first configuration information and / or the second configuration information: whether the first cell supports repeated transmission of Msg1; whether the first cell supports repeated transmission of Msg3; and relevant parameters when Msg3 is repeatedly transmitted; wherein the first cell is the serving cell of the terminal.

[0222] Optionally, the relevant parameters for repeated Msg3 transmission include at least one of the following: a first set, which includes at least one Msg1 time-frequency resource set; a second set, which includes at least one Msg1 pilot; a third set, which includes at least one Msg1 repeated transmission count; a fourth set, which includes at least one Msg3 repeated transmission count; and a transmission power step value.

[0223] In this embodiment, when the terminal repeatedly sends Msg1 for random access, it can determine the interpretation method of the UL grant in Msg2 and the transmission parameters of Msg3 through protocol agreement or dynamic indication. This not only enhances the coverage performance of uplink channels such as Msg1 and Msg3, but also ensures that the UL grant and DCI 0-0 overhead remain unchanged, ensuring that the transmission parameters of Msg3 are unambiguous on both the base station and the terminal, thereby ensuring the reliability of the random access process.

[0224] This 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 programs or instructions to implement the steps of the method described in embodiment 500. This network-side device embodiment corresponds to the above-described network-side device method embodiment, and all implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and can achieve the same technical effects.

[0225] Specifically, embodiments of this application also provide a network-side device. For example... Figure 9 As shown, the network device 900 includes an antenna 901, a radio frequency (RF) device 902, and a baseband device 903. The antenna 901 is connected to the RF device 902. In the uplink direction, the RF device 902 receives information through the antenna 901 and transmits the received information to the baseband device 903 for processing. In the downlink direction, the baseband device 903 processes the information to be transmitted and sends it to the RF device 902. The RF device 902 processes the received information and transmits it through the antenna 901.

[0226] The aforementioned frequency band processing device can be located in the baseband device 903. The method executed by the network-side device in the above embodiments can be implemented in the baseband device 903, which includes a processor 904 and a memory 905.

[0227] The baseband device 903 may, for example, include at least one baseband board on which multiple chips are disposed, such as... Figure 9 As shown, one of the chips, for example, is a processor 904, which is connected to a memory 905 to call the program in the memory 905 and execute the network device operations shown in the above method embodiment.

[0228] The baseband device 903 may also include a network interface 906 for exchanging information with the radio frequency device 902, such as a common public radio interface (CPRI).

[0229] Specifically, the network-side device in this embodiment of the invention further includes: instructions or programs stored in memory 905 and executable on processor 904, wherein processor 904 calls the instructions or programs in memory 905 to execute... Figure 7 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0230] This application also provides a readable storage medium storing a program or instructions that, when executed by a processor, implement the various processes of the random access method embodiments 200-500 described above, and achieve the same technical effect. To avoid repetition, these will not be described again here.

[0231] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM).

[0232] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run network-side device programs or instructions to implement the various processes of the above-described random access method embodiments 200-500, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0233] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0234] This application also provides a computer program product, which includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor. When the program or instructions are executed by the processor, they implement the various processes of the above-described method embodiments 200-500 and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0235] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0236] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0237] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for random access, characterized in that, include: The terminal performs random access by repeatedly sending the first message Msg1; The method further includes: The terminal determines the transmission parameters of the third message Msg3; wherein, the transmission parameters include the transmission beam; The step of the terminal determining the transmission beam of Msg3 includes at least one of the following: The terminal determines the transmission beam for the initial transmission of Msg3 based on the first reference beam. The first reference beam is determined by the terminal based on the interpretation result of the uplink grant (UL Grant) or the value of the random access-radio temporary identifier (RA-RNTI) included in the monitored Msg2. The terminal determines the transmission beam for Msg3 retransmission based on the second reference beam. The second reference beam is determined by the terminal based on the first downlink control information, which includes DCI 0-0 scrambled by TC-RNTI.

2. The method as described in claim 1, characterized in that, The sending parameters also include the number of times to send.

3. The method as described in claim 2, characterized in that, The step of determining the number of times Msg3 is sent by the terminal includes at least one of the following: The terminal determines the number of times Msg3 is sent based on the interpretation result of the UL Grant included in the second message Msg2 that it has been monitored. The terminal assumes that the number of times Msg3 is sent is equal to the number of times Msg1 is sent. The terminal determines the number of times Msg3 is sent based on the value of RA-RNTI, and RA-RNTI is used to monitor Msg2; The terminal determines the number of times Msg3 is transmitted based on the first downlink control information, which includes TC-RNTI scrambled DCI 0-0.

4. The method as described in claim 3, characterized in that, The step of determining the number of times Msg3 is sent based on the value of RA-RNTI by the terminal includes: When the terminal uses multiple RA-RNTIs to monitor Msg2, the terminal determines the number of times Msg3 will be sent based on the value of the target RA-RNTI. The target RA-RNTI is the RA-RNTI that successfully listened to Msg2 among the multiple RA-RNTIs, and the multiple RA-RNTIs correspond one-to-one with the repeatedly sent first message Msg1.

5. The method as described in claim 1, characterized in that, The first reference beam includes at least one of the following: The transmission beam of Msg1; The receiving beam of Msg2; The receiving beam of the synchronization signal block SSB, which is associated with Msg1.

6. The method as described in claim 1, characterized in that, The second reference beam includes at least one of the following: The transmission beam of Msg1; The receiving beam of Msg2; The receiving beam of the synchronization signal block SSB, which is associated with Msg1; The transmission beam during the initial transmission of Msg3.

7. The method as described in claim 1, characterized in that, The interpretation result of the UL Grant included in Msg2 is obtained by the terminal interpreting the UL Grant in Msg2 according to the first interpretation method, wherein the first interpretation method includes at least one of the following: UL Grant interpretation method based on information from the first system; The default interpretation method for UL Grants; The UL Grant interpretation method indicated by the first field includes any one of the fields in the sub-protocol data unit (sub PDU) included in Msg2, the fields in the UL grant included in Msg2, and the fields in the second downlink control information, wherein the second downlink control information is RA-RNTI scrambled DCI 1-0.

8. The method as described in claim 7, characterized in that, The fields in the UL grant include at least one of the following: Channel State Information Request (CSI) field, Modulation and Coding Scheme (MCS) field, and Transmit Power Control (TPC) field.

9. The method as described in claim 7, characterized in that, The UL Grant format corresponding to the UL Grant interpretation method includes any of the following: The first UL grant format, the UL grant corresponding to the first UL grant format indicates the number of times Msg3 is transmitted, but cannot indicate the transmission beam of Msg3; The second UL grant format, wherein the UL grant corresponding to the second UL grant format cannot indicate the number of transmissions and the transmission beam of Msg3; The third UL grant format, the UL grant corresponding to the third UL grant format, indicates the number of transmissions and the transmission beam of Msg3.

10. The method as described in claim 9, characterized in that, When the UL Grant format corresponding to the UL Grant interpretation method is a first UL grant format or a second UL grant format, the step of the terminal determining the transmission beam for the initial transmission of Msg3 based on the first reference beam includes any one of the following: The terminal determines the transmission beam of Msg3 based on the receiving beam of Msg2; The terminal determines the first reference beam based on the value of RA-RNTI, and determines the transmit beam of Msg3 based on the first reference beam. The first reference beam includes the receive beam of Msg2 or the receive beam of SSB. Msg3 can be a single transmission or multiple repeated transmissions using a single beam.

11. The method as described in claim 8, characterized in that, When the UL Grant format corresponding to the UL Grant interpretation method is a first UL grant format or a second UL grant format, the step of the terminal determining the transmission beam of Msg3 further includes: The terminal determines the transmission beam used for repeated transmission of Msg3 based on the transmission beam pattern. The transmission beam pattern includes L transmission beams, where L is an integer greater than 1.

12. The method as described in claim 11, characterized in that, The order of the transmission beams included in the transmission beam pattern is the same as the order of the transmission beams in the repeated transmission of Msg1.

13. The method as described in claim 11, characterized in that, The step of the terminal determining the transmission beam for repeated transmission of Msg3 based on the transmission beam pattern includes any one of the following: When L is greater than M, the terminal determines the M transmission beams when Msg3 is repeatedly transmitted, starting from the first beam in the transmission beam pattern. The first beam and its position in the transmission beam pattern are determined according to the receiving beam of Msg2 or the value of RA-RNTI. When L equals M, the terminal determines M Msg3 transmission beams starting from the first transmission beam in the transmission beam pattern, wherein the first transmission beam is the starting transmission beam when the M Msg3 are repeatedly transmitted. When L is less than M, the M transmission beams for repeated transmission of Msg3 are determined from the transmission beam pattern according to the cyclic method. Where M is the number of times Msg3 is sent, and L and M are both integers greater than or equal to 1.

14. The method as described in claim 13, characterized in that, The initial transmission beam for repeated transmission of Msg3 is determined based on the receiving beam of Msg2 or the value of RA-RNTI.

15. The method as described in claim 13, characterized in that, The order of the transmission beams when Msg3 is repeatedly transmitted is determined according to the beam order in the transmission beam pattern.

16. The method according to any one of claims 1-15, characterized in that, In the case of random access via repeatedly sending the first message Msg1, before the step of the terminal determining the sending parameters of the third message Msg3, the method further includes: The terminal receives second system information sent by the network-side device. The second system information includes first configuration information and second configuration information. The first configuration information is used for the repeated transmission of Msg1, and the second configuration information is used for the transmission of Msg3.

17. The method as described in claim 16, characterized in that, The first configuration information includes at least one of the following: Is the transmission beam corresponding to Msg1 a single beam or multiple beams? Is Msg1 associated with a single SSB or with multiple SSBs? Does the first cell support repeated transmission of Msg3, where the first cell is the serving cell of the terminal; The interpretation method of the UL grant.

18. The method as described in claim 16, characterized in that, The second configuration information includes at least one of the following: Is the transmission beam corresponding to Msg3 a single beam or multiple beams? The first transmission beam pattern corresponding to Msg3.

19. The method as described in claim 16, characterized in that, After the step of the terminal receiving the second system information sent by the network-side device, the method further includes: The terminal determines at least one of the following based on the first configuration information and / or the second configuration information: Does the first cell support repeated transmission of Msg1? Does the first cell support repeated transmission of Msg3? The relevant parameters when Msg3 is repeatedly sent; The first cell is the serving cell of the terminal.

20. The method as described in claim 19, characterized in that, When resending Msg3, the relevant parameters include at least one of the following: The first set includes at least one Msg1 time-frequency resource set; The second set includes at least one Msg1 pilot; The third set includes at least one number of repeated Msg1 transmissions; The fourth set includes at least one number of repeated Msg3 transmissions; Transmit power step value.

21. A method for random access, characterized in that, The method includes: The network-side device receives the first message Msg1; Msg1 is sent by the terminal through repeated transmission; After the network-side device receives the first message Msg1, the method further includes at least one of the following: The network-side device sends a second message Msg2 to the terminal. The sending parameters of the third message Msg3 are related to the determination of Msg2. The Msg2 includes an uplink grant (UL Grant) or a random access-radio temporary identifier (RA-RNTI). The network-side device sends first downlink control information to the terminal. The first downlink control information is related to the transmission parameters during Msg3 retransmission. The first downlink control information includes DCI 0-0 scrambled by TC-RNTI. The transmission parameters include the transmission beam.

22. The method as described in claim 21, characterized in that, The sending parameters also include the number of times to send.

23. The method as described in claim 21, characterized in that, The Msg2 includes a first field for indicating the interpretation method of the UL Grant, the first field including fields in the sub-protocol data unit (sub PDU) included in the Msg2 and fields in the UL grant included in the Msg2.

24. The method as described in claim 21, characterized in that, The fields in the UL grant include at least one of the following: Channel State Information Request (CSI) field, Modulation and Coding Scheme (MCS) field, and Transmit Power Control (TPC) field.

25. The method as described in claim 21, characterized in that, Before the network-side device receives the first message Msg1 repeatedly sent by the terminal, the method further includes: The network-side device sends second system information to the terminal; The second system information includes first configuration information and second configuration information. The first configuration information is used for the repeated transmission of Msg1, and the second configuration information is used for the transmission of Msg3.

26. The method as described in claim 25, characterized in that, The first configuration information includes at least one of the following: Is the transmission beam corresponding to Msg1 a single beam or multiple beams? Is Msg1 associated with a single SSB or with multiple SSBs? Does the first cell support repeated transmission of Msg3, where the first cell is the serving cell of the terminal; The interpretation method of the UL grant.

27. The method as described in claim 25, characterized in that, The second configuration information includes at least one of the following: Is the transmission beam corresponding to Msg3 a single beam or multiple beams? The first transmission beam pattern corresponding to Msg3.

28. A device for random access, characterized in that, Applied to a terminal, the device includes: The first transmission module performs random access by repeatedly sending the first message Msg1; the determining module is used to determine the transmission parameters of the third message Msg3; wherein, the transmission parameters include the transmission beam; The step of determining the transmission beam of Msg3 by the determining module includes at least one of the following: The transmission beam of Msg3 during initial transmission is determined based on the first reference beam. The first reference beam is determined based on the interpretation result of the UL Grant included in the monitored Msg2 or the value of the Random Access-Radio Network Temporary Identifier RA-RNTI. The transmission beam for Msg3 retransmission is determined based on the second reference beam, which is determined based on the first downlink control information, including DCI 0-0 scrambled by TC-RNTI.

29. The apparatus as claimed in claim 28, characterized in that, The sending parameters also include the number of times to send.

30. The apparatus as claimed in claim 29, characterized in that, The step of determining the number of times Msg3 is sent by the determining module includes at least one of the following: Based on the interpretation of the UL Grant included in the second message Msg2 that was monitored, the number of times Msg3 was sent was determined; By default, the number of times Msg3 is sent is equal to the number of times Msg1 is sent; The number of times Msg3 is sent is determined based on the value of RA-RNTI, where RA-RNTI is used to monitor Msg2; The number of times Msg3 is transmitted is determined based on the first downlink control information, which includes TC-RNTI scrambled DCI 0-0.

31. The apparatus as claimed in claim 29, characterized in that, The step of determining the number of times Msg3 is sent based on the value of RA-RNTI includes: When using multiple RA-RNTIs to monitor Msg2, the number of times Msg3 is sent is determined based on the value of the target RA-RNTI; The target RA-RNTI is the RA-RNTI that successfully listened to Msg2 among the multiple RA-RNTIs, and the multiple RA-RNTIs correspond one-to-one with the repeatedly sent first message Msg1.

32. The apparatus as claimed in claim 28, characterized in that, The interpretation result of the UL Grant included in Msg2 is obtained by the terminal interpreting the UL Grant in Msg2 according to the first interpretation method, wherein the first interpretation method includes at least one of the following: UL Grant interpretation method based on information from the first system; The default interpretation method for UL Grants; The UL Grant interpretation method indicated by the first field includes any one of the fields in the sub-protocol data unit (sub PDU) included in Msg2, the fields in the UL grant included in Msg2, and the fields in the second downlink control information, wherein the second downlink control information is RA-RNTI scrambled DCI 1-0.

33. A device for random access, characterized in that, Applied to network-side devices, the device includes: The second transmission module is used to receive the first message Msg1; wherein Msg1 is sent by the terminal in the form of repeated transmission; The second transmission module is also used for at least one of the following: Send a second message Msg2 to the terminal; wherein, the Msg2 is related to the determination of the sending parameters of the third message Msg3, and the Msg2 includes an uplink grant (UL Grant) or a random access-radio network temporary identifier (RA-RNTI); Send first downlink control information to the terminal. The first downlink control information includes DCI 0-0 scrambled by TC-RNTI. The first downlink control information is related to the transmission parameters when Msg3 is retransmitted. The transmission parameters include the transmission beam.

34. The apparatus as claimed in claim 33, characterized in that, The sending parameters also include the number of times to send.

35. A terminal, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the random access method as described in any one of claims 1 to 20.

36. A network-side device, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the random access method as described in any one of claims 21 to 24.

37. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the random access method as described in any one of claims 1-20, or the steps of the random access method as described in any one of claims 21-24.

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