Multi-physical random access channel (prach) transmission method and apparatus

Abstract

The disclosure provides a multi-PRACH transmission method and device, relates to the technical field of mobile communication, and provides a multi-PRACH transmission method, a terminal device and a network device according to an embodiment of the disclosure. According to the same configuration rule, the terminal device and the network device determine the position sequence of each PRACH transmission in one multi-PRACH transmission according to the position sequence of a random access channel (RACH) occasion (RO) in response to performing multi-PRACH transmission. The multi-PRACH transmission method and device provided by the disclosure provide a solution to how to configure the RO in multi-PRACH transmission, and ensure the normal and orderly transmission of multiple Msg1 in multi-PRACH transmission.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of mobile communication, and particularly relates to a multi-PRACH transmission method and device. BACKGROUND

[0002] With the continuous development of wireless communication, the requirement for communication capability is also higher and higher. One of the bottlenecks of uplink coverage is a physical random access channel (PRACH). In order to improve the coverage of the PRACH channel, 3GPP R18 is preparing to formulate a multi-PRACH transmission scheme, that is, a UE sends multiple Msg1 transmissions in one attempt of random access. At present, how to configure the RO of multi-PRACH transmission is urgently needed to be solved. SUMMARY

[0003] The present disclosure provides a multi-PRACH transmission method and device, and provides a RO configuration of multi-PRACH transmission.

[0004] The first aspect embodiment of the present disclosure provides a multi-PRACH transmission method, the method is applied to a terminal device, and the method comprises the following steps:

[0005] In response to performing multi-PRACH transmission, the position sequence of each PRACH transmission in one multi-PRACH transmission is determined according to the position sequence of a random access channel (RACH) occasion (RO).

[0006] In some embodiments of the present disclosure, the step of determining the position sequence of each PRACH transmission in one multi-PRACH transmission according to the position sequence of the RACH occasion (RO) comprises the following steps:

[0007] In response to a first RO associated with one SSB, M consecutive or equally spaced ROs starting from an Xth RO in the first RO are mapped to M ROs in a first transmission opportunity of the multi-PRACH transmission, the X is a starting offset of the RO, and the M is a maximum allowed PRACH transmission number of one multi-PRACH transmission.

[0008] The second M consecutive or equally spaced ROs in the first RO are mapped to M ROs in a second transmission opportunity of the multi-PRACH transmission, and other M consecutive or equally spaced ROs in the first RO are mapped to M ROs in other transmission opportunities of the multi-PRACH transmission in a similar manner.

[0009] In some embodiments of the present disclosure, the method further comprises the following steps:

[0010] In response to the terminal device selecting a target SSB for a multi-PRACH transmission, starting the multi-PRACH transmission at a Yth RO of a transmission opportunity of the multi-PRACH transmission corresponding to the target SSB, where Y is a starting offset of the RO.

[0011] In some embodiments of the present disclosure, the method further comprises:

[0012] In response to the terminal device selecting a target SSB for a multi-PRACH transmission, starting the multi-PRACH transmission at any RO of a transmission opportunity of the multi-PRACH transmission corresponding to the target SSB.

[0013] In some embodiments of the present disclosure, the number of PRACH transmissions in the multi-PRACH transmission is less than or equal to M.

[0014] In some embodiments of the present disclosure, after completing the mapping of the first RO to the RO of the output opportunity of the multi-PRACH transmission, the method further comprises at least one of the following steps:

[0015] In response to the number of remaining ROs in the first RO not satisfying the mapping of the next round of the first RO to the RO of the output opportunity of the multi-PRACH transmission, determining that the remaining ROs in the first RO cannot be used for the multi-PRACH transmission.

[0016] And

[0017] In response to the number of PRACH transmissions of the multi-PRACH transmission being less than or equal to the number of remaining ROs in the first RO, determining that the remaining ROs in the first RO can be used for the multi-PRACH transmission.

[0018] In some embodiments of the present disclosure, the determining of the position order of each PRACH transmission in the multi-PRACH transmission according to the position order of the random access channel (RACH) occasion (RO) comprises:

[0019] In response to determining that all time domain positions of the first RO associated with an SSB, mapping M consecutive or equally spaced time domain positions starting from a zth time domain position among all time domain positions in the first RO to M time domain positions in a first transmission opportunity of the multi-PRACH transmission, where z is a starting offset of the time domain position, and M is the maximum allowed number of PRACH transmissions of the multi-PRACH transmission.

[0020] map the second M consecutive or equally-spaced time domain positions among all time domain positions of the first RO to M time domain positions in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the M consecutive or equally-spaced time domain positions in other time domain positions of the first RO to M time domain positions in other transmission opportunities of the multi-PRACH transmission.

[0021] In some embodiments of the present disclosure, the method further comprises:

[0022] In response to the terminal device selecting a target SSB for a multi-PRACH transmission, starting the multi-PRACH transmission at the Yth time domain position of a transmission opportunity of the multi-PRACH transmission corresponding to the target SSB.

[0023] In some embodiments of the present disclosure, the method further comprises:

[0024] In response to the terminal device selecting a target SSB for a multi-PRACH transmission, starting the multi-PRACH transmission at any time domain position of a transmission opportunity of the multi-PRACH transmission corresponding to the target SSB.

[0025] In some embodiments of the present disclosure, the method further comprises:

[0026] In response to the terminal device performing the multi-PRACH transmission at a time domain position in a multi-PRACH transmission opportunity, using N consecutive or equally-spaced ROs starting from the pth RO to transmit N PRACHs in the multi-PRACH transmission at a time domain position in a multi-PRACH transmission opportunity, where p is the starting offset of the RO.

[0027] In some embodiments of the present disclosure, after completing the mapping of the time domain positions of a first RO to the time domain positions of the multi-PRACH transmission, the method further comprises at least one of the following steps:

[0028] In response to the number of remaining time domain positions in the first RO not satisfying the mapping of the time domain positions of the first RO to the time domain positions of the next round of the multi-PRACH transmission, determining that the remaining time domain positions in the first RO cannot be used for the multi-PRACH transmission.

[0029] and

[0030] In response to the number of PRACH transmissions of a multi-PRACH transmission being less than or equal to the number of remaining time domain positions in the first RO, determining that the remaining time domain positions in the first RO can be used for the multi-PRACH transmission.

[0031] In some embodiments of the present disclosure, the method further comprises:

[0032] mapping, in response to a second RO associated with a time domain position, M consecutive or equally spaced ROs starting from an Xth RO in the second RO to M ROs in a first transmission opportunity of the multiple PRACH transmissions, the X being a starting offset of ROs, and the M being a maximum allowed number of PRACH transmissions in a multiple PRACH transmission;

[0033] mapping the second M consecutive or equally spaced ROs in the second RO to M ROs in a second transmission opportunity of the multiple PRACH transmissions, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the second RO to M ROs in other transmission opportunities of the multiple PRACH transmissions.

[0034] In some embodiments of the present disclosure, the method further comprises:

[0035] starting the multiple PRACH transmission at a Yth RO in a transmission opportunity of the multiple PRACH transmission corresponding to the target time domain position in response to the terminal device selecting the target time domain position for the multiple PRACH transmission, the Y being a starting offset of ROs.

[0036] In some embodiments of the present disclosure, the method further comprises:

[0037] starting the multiple PRACH transmission at any RO in a transmission opportunity of the multiple PRACH transmission corresponding to the target time domain position B in response to the terminal device selecting the target time domain position B for the multiple PRACH transmission.

[0038] In some embodiments of the present disclosure, the number of PRACH transmissions in the multiple PRACH transmission is less than or equal to M.

[0039] In some embodiments of the present disclosure, after completing the mapping of the second RO to the ROs in the transmission opportunities of the multiple PRACH transmissions, the method further comprises at least one of the following steps:

[0040] determining that the remaining ROs in the second RO cannot be used for the multiple PRACH transmissions in response to the number of the remaining ROs in the second RO not satisfying the mapping of the second RO to the ROs in the transmission opportunities of the multiple PRACH transmissions in the next round;

[0041] and

[0042] In response to the number of PRACH transmissions of the one multi-PRACH transmission being less than or equal to the number of remaining ROs in the second RO, it is determined that the remaining ROs in the second RO can be used for the multi-PRACH transmission.

[0043] In some embodiments of the present disclosure, the determining the position order of each PRACH transmission in the one multi-PRACH transmission according to the position order of the random access channel (RACH) occasions (ROs) comprises:

[0044] In response to a third RO in the SSB-RO association period, mapping M consecutive or equally spaced ROs starting from an Xth RO in the third RO to M ROs in a first transmission opportunity of the multi-PRACH transmission, wherein X is a starting offset of ROs, and M is a maximum allowed number of PRACH transmissions of the one multi-PRACH transmission.

[0045] Mapping the second M consecutive or equally spaced ROs in the third RO to M ROs in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the third RO to M ROs in other transmission opportunities of the multi-PRACH transmission.

[0046] In some embodiments of the present disclosure, the method further comprises:

[0047] In response to the terminal performing the one multi-PRACH transmission in the SSB-RO association period, starting the one multi-PRACH transmission at a Yth RO of a transmission opportunity of the one multi-PRACH transmission in the SSB-RO association period, wherein Y is a starting offset of ROs.

[0048] In some embodiments of the present disclosure, the method further comprises:

[0049] In response to the terminal device performing the one multi-PRACH transmission in the SSB-RO association period, starting the one multi-PRACH transmission at any RO of a transmission opportunity of the one multi-PRACH transmission in the SSB-RO association period.

[0050] In some embodiments of the present disclosure, the number of PRACH transmissions in the one multi-PRACH transmission is less than or equal to M.

[0051] In some embodiments of the present disclosure, after completing the mapping of the third RO to the RO of the output opportunity of the multi-PRACH transmission, the method further comprises at least one of the following steps:

[0052] determining that the remaining ROs in the third ROs cannot be used for the multi-PRACH transmission in response to that the number of the remaining ROs in the third ROs does not satisfy the mapping of the ROs in the next round of the third ROs to the output opportunities of the multi-PRACH transmission;

[0053] and

[0054] determining that the remaining ROs in the third ROs can be used for the multi-PRACH transmission in response to that the number of the PRACH transmission times of one multi-PRACH transmission is less than or equal to the number of the remaining ROs in the third ROs

[0055] A second aspect embodiment of the present disclosure provides a multi-PRACH transmission method, which is applied to a network device and includes:

[0056] determining the position order of each PRACH transmission in one multi-PRACH transmission according to the position order of the random access channel (RACH) occasions (ROs) in response to performing the multi-PRACH transmission.

[0057] In some embodiments of the present disclosure, the step of determining the position order of each PRACH transmission in one multi-PRACH transmission according to the position order of the random access channel (RACH) occasions (ROs) includes:

[0058] mapping M consecutive or equally spaced ROs in the first ROs starting from the Xth RO to the M ROs in the first transmission opportunity of the multi-PRACH transmission in response to that the first RO is associated with one SSB, wherein the X is the starting offset of the ROs, and the M is the maximum allowed PRACH transmission times of one multi-PRACH transmission;

[0059] mapping the second M consecutive or equally spaced ROs in the first ROs to the M ROs in the second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the first ROs to the M ROs in the other transmission opportunities of the multi-PRACH transmission.

[0060] In some embodiments of the present disclosure, after completing the mapping of the ROs in one first RO to the output opportunities of the multi-PRACH transmission, the method further includes at least one of the following steps:

[0061] determining that the remaining ROs in the first ROs cannot be used for the multi-PRACH transmission in response to that the number of the remaining ROs in the first ROs does not satisfy the mapping of the ROs in the next round of the first ROs to the output opportunities of one multi-PRACH transmission;

[0062] and

[0063] determining that the remaining time domain positions in the first RO are available for the multiple PRACH transmission in response to a number of PRACH transmissions in one multiple PRACH transmission being less than or equal to a number of the remaining time domain positions in the first RO.

[0064] In some embodiments of the present disclosure, the determining the order of positions of each PRACH transmission in one multiple PRACH transmission according to the order of positions of random access channel (RACH) occasions (ROs) comprises:

[0065] mapping, in response to all time domain positions of a first RO associated with one SSB, M consecutive or equally spaced time domain positions starting from a z-th time domain position among the all time domain positions in the first RO to M time domain positions in a first transmission opportunity of the multiple PRACH transmission, the z being a starting offset of time domain positions, and the M being a maximum allowed number of PRACH transmissions in one multiple PRACH transmission;

[0066] mapping the second M consecutive or equally spaced time domain positions among the all time domain positions of the first RO to the M time domain positions in a second transmission opportunity of the multiple PRACH transmission, and so on, to complete the mapping of the M consecutive or equally spaced time domain positions in other time domain positions of the first RO to the M time domain positions in other transmission opportunities of the multiple PRACH transmission.

[0067] In some embodiments of the present disclosure, after the mapping of the time domain positions of one first RO to the time domain positions of the output opportunities of the multiple PRACH transmission is completed, the method further comprises at least one of the following steps:

[0068] determining that the remaining time domain positions in the first RO are not available for the multiple PRACH transmission in response to a number of the remaining time domain positions in the first RO not satisfying a mapping of time domain positions of the next round of the first RO to the time domain positions of the output opportunities of one multiple PRACH transmission;

[0069] and

[0070] determining that the remaining time domain positions in the first RO are available for the multiple PRACH transmission in response to a number of PRACH transmissions in one multiple PRACH transmission being less than or equal to a number of the remaining time domain positions in the first RO.

[0071] In some embodiments of the present disclosure, the determining the order of positions of each PRACH transmission in one multiple PRACH transmission according to the order of positions of random access channel (RACH) occasions (ROs) comprises:

[0072] mapping, from a first Xth RO, M consecutive or equally spaced ROs in the second RO to M ROs in a first transmission occasion of the multiple PRACH transmission, the X being a starting offset of ROs, and the M being a maximum allowed number of PRACH transmissions for one multiple PRACH transmission;

[0073] mapping, from a second M consecutive or equally spaced ROs in the second RO to M ROs in a second transmission occasion of the multiple PRACH transmission, and so on, to complete the mapping of other M consecutive or equally spaced ROs in the second RO to M ROs in other transmission occasions of the multiple PRACH transmission.

[0074] In some embodiments of the disclosure, after completing the mapping of one second RO to ROs in the output occasions of the multiple PRACH transmission, the method further comprises:

[0075] determining that the remaining ROs in the second RO cannot be used for the multiple PRACH transmission, in response to a number of the remaining ROs in the second RO not satisfying a condition for performing a next round of mapping of the second RO to ROs in the output occasions of the multiple PRACH transmission.

[0076] determining that the remaining ROs in the second RO can be used for the multiple PRACH transmission, in response to a number of PRACH transmissions for one multiple PRACH transmission being less than or equal to a number of the remaining ROs in the second RO.

[0077] In some embodiments of the disclosure, the determining the order of positions of the respective PRACH transmissions in one multiple PRACH transmission according to the order of positions of the random access channel (RACH) occasions (ROs) comprises:

[0078] mapping, from a first Xth RO, M consecutive or equally spaced ROs in the third RO to M ROs in a first transmission occasion of the multiple PRACH transmission, the X being a starting offset of ROs, and the M being a maximum allowed number of PRACH transmissions for one multiple PRACH transmission;

[0079] mapping, from a second M consecutive or equally spaced ROs in the third RO to M ROs in a second transmission occasion of the multiple PRACH transmission, and so on, to complete the mapping of other M consecutive or equally spaced ROs in the third RO to M ROs in other transmission occasions of the multiple PRACH transmission.

[0080] In some embodiments of the disclosure, after completing the mapping of one third RO to ROs in the output occasions of the multiple PRACH transmission, the method further comprises at least one of the following steps:

[0081] in response to the number of remaining ROs in the third RO not satisfying mapping of the ROs in the third RO to the output opportunities of the multiple PRACH transmissions in the next round, determining that the remaining ROs in the third RO cannot be used for the multiple PRACH transmissions;

[0082] and

[0083] in response to the number of PRACH transmissions in a multiple PRACH transmission being less than or equal to the number of remaining ROs in the third RO, determining that the remaining ROs in the third RO can be used for the multiple PRACH transmissions.

[0084] A third aspect embodiment of the present disclosure provides a multiple PRACH transmission apparatus, the apparatus being applied to a terminal device, and the apparatus comprises:

[0085] A determining unit is configured to, in response to performing a multiple PRACH transmission, determine the position order of each PRACH transmission in a multiple PRACH transmission according to the position order of random access channel (RACH) occasions (ROs).

[0086] A fourth aspect embodiment of the present disclosure provides a multiple PRACH transmission apparatus, the apparatus being applied to a second device, and the apparatus comprises:

[0087] A first determining unit is configured to, in response to performing a multiple PRACH transmission, determine the position order of each PRACH transmission in a multiple PRACH transmission according to the position order of random access channel (RACH) occasions (ROs).

[0088] A fifth aspect embodiment of the present disclosure provides a communication device, comprising: a transceiver; a memory; and a processor connected with the transceiver and the memory respectively, configured to control wireless signal transceiving of the transceiver by executing computer executable instructions on the memory, and capable of implementing the method of the first aspect embodiment or the second aspect embodiment of the present disclosure.

[0089] A sixth aspect embodiment of the present disclosure provides a computer storage medium, wherein the computer storage medium stores computer executable instructions; the computer executable instructions are executed by a processor, and capable of implementing the method of the first aspect embodiment or the second aspect embodiment of the present disclosure.

[0090] The embodiments of the present disclosure provide a multiple PRACH transmission method and apparatus, which determines the position order of each PRACH transmission in a multiple PRACH transmission according to the position order of random access channel (RACH) occasions (ROs), provides a solution to how to configure ROs in a multiple PRACH transmission, and guarantees normal and orderly transmission of multiple Msg1s in a multiple PRACH transmission.

[0091] Additional aspects and advantages of the present disclosure will be made apparent from the following description with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0092] The above and / or additional aspects and advantages of the present disclosure will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0093] Figure 1 A flowchart of a multi-PRACH transmission method on a terminal device side according to an embodiment of the present disclosure;

[0094] Figure 2 A flowchart of a multi-PRACH transmission method on a network device side according to an embodiment of the present disclosure;

[0095] Figure 3 A flowchart of a multi-PRACH transmission method according to an embodiment of the present disclosure;

[0096] Figure 4 A flowchart of a multi-PRACH transmission method according to an embodiment of the present disclosure;

[0097] Figure 5 A flowchart of a multi-PRACH transmission method according to an embodiment of the present disclosure;

[0098] Figure 6 A flowchart of a multi-PRACH transmission method according to an embodiment of the present disclosure;

[0099] Figure 7 A block diagram of a multi-PRACH transmission apparatus on a terminal device side according to an embodiment of the present disclosure;

[0100] Figure 8 A block diagram of a multi-PRACH transmission apparatus on a terminal device side according to an embodiment of the present disclosure;

[0101] Figure 9 A block diagram of a multi-PRACH transmission apparatus on a terminal device side according to an embodiment of the present disclosure;

[0102] Figure 10 A block diagram of a multi-PRACH transmission apparatus on a network device side according to an embodiment of the present disclosure;

[0103] Figure 11 A block diagram of a multi-PRACH transmission apparatus on a network device side according to an embodiment of the present disclosure;

[0104] Figure 12 A block diagram of a communication apparatus according to an embodiment of the present disclosure;

[0105] Figure 13 A structural schematic diagram of a chip is provided for an embodiment of the present disclosure. DETAILED DESCRIPTION

[0106] Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. Examples of the embodiments are shown in the drawings, in which the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present disclosure, and are not to be understood as limiting the present disclosure.

[0107] With the continuous development of wireless communication, the requirement for communication capability is also increasing. One of the bottlenecks of uplink coverage is the physical random access channel (PRACH). In order to improve the coverage of the PRACH channel, 3GPP R18 is preparing to formulate a scheme based on multi-PRACH transmission, that is, the UE sends multiple Msg1 transmissions in one attempt of random access. At present, how to configure the RO of multi-PRACH transmission is urgently needed to be solved.

[0108] To this end, the present disclosure proposes a multi-PRACH transmission method and device, which provides a solution to how to configure the RO in multi-PRACH transmission, and guarantees the normal and orderly transmission of multiple Msg1 in multi-PRACH transmission.

[0109] The multi-PRACH transmission or multi-PRACH transmission mentioned in the embodiments of the present disclosure refers to that the terminal performs multiple PRACH transmissions when performing Msg1 transmission. That is, when performing PRACH transmission, multiple PRACH transmissions are performed instead of one PRACH transmission. In the embodiments of the present disclosure, “multiple” refers to two or more.

[0110] The switching method and device provided by the present application will be described in detail below with reference to the accompanying drawings.

[0111] Figure 1 A flowchart of a multi-PRACH transmission method according to an embodiment of the present disclosure is shown. As shown in the figure, the method is applied to a terminal device and includes the following steps. Figure 1

[0112] Step 101: In response to performing multi-PRACH transmission, the terminal device determines the position order of each PRACH transmission in one multi-PRACH transmission according to the position order of the RO.

[0113] ​In some embodiments of the present disclosure, when performing the multi-PRACH transmission, each PRACH transmission in the multi-PRACH transmission needs to be performed on different ROs, so each PRACH transmission RO in a multi-PRACH transmission can be selected from the ROs, a mapping of each PRACH transmission RO in a multi-PRACH transmission and the ROs selected from the ROs is formed to form the position order of each PRACH transmission in a multi-PRACH transmission; the multi-PRACH transmission can perform each PRACH transmission according to the mapping RO. The present application does not specifically limit how to select the ROs for each PRACH transmission in the multi-PRACH transmission from the ROs, for example, it can be performed according to the time domain and frequency domain of the ROs.

[0114] It should be noted that one PRACH transmission belongs to uplink transmission and is applied to one attempt of random access. In order for the terminal to successfully perform random access, the network device on the network side, such as GNB, etc., also needs to know the ROs of each PRACH transmission in the multi-PRACH transmission, so as to facilitate information reception of each PRACH transmission, so when mapping the ROs of each PRACH transmission in the multi-PRACH transmission, the terminal device and the network device need to use the same method to ensure the accuracy of the multi-PRACH transmission. The specific RO mapping configuration rule can be agreed by the protocol or determined by the network device and then issued to the terminal device, and the specific embodiments of the present disclosure do not limit this.

[0115] As described above, the embodiments of the present disclosure also provide a multi-PRACH transmission method, which is applied to a network device, such as Figure 2 As shown in the figure, the method comprises:

[0116] Step 201, the network device determines the position order of each PRACH transmission in a multi-PRACH transmission according to the position order of the random access channel (RACH) occasion (RO) in response to performing the multi-PRACH transmission.

[0117] In the embodiments of the present disclosure, when performing the multi-PRACH transmission, in order to ensure the accuracy of each PRACH transmission in the multi-PRACH transmission, the network device needs to keep consistent with the terminal device on the configuration of the position order of each PRACH transmission in the multi-PRACH transmission, so when mapping the ROs of each PRACH transmission in the multi-PRACH transmission, the same RO configuration rule as the network device needs to be used by the terminal device. The RO configuration rule can be set by the network device and issued to the terminal device, or it can be agreed by the protocol, and the specific embodiments of the present disclosure do not limit this.

[0118] The embodiment of the present disclosure provides a multi-PRACH transmission method and device, the position order of each PRACH transmission in one-time multi-PRACH transmission is determined according to the position order of random access channel (PRACH) occasions (RO), a solution for how to configure RO in multi-PRACH transmission is provided, and normal and orderly transmission of multiple Msg1 in multi-PRACH transmission is ensured.

[0119] It should be noted that the random access process in NR uses beams, wherein the SSB has multiple transmission opportunities in a time domain period, and has a corresponding number, which can correspond to different beams respectively, and for a UE terminal device, only when the beam scanning signal of the SSB covers the UE, the UE has an opportunity to send a preamble. When the network side receives the preamble of the UE, the downlink best beam is known, in other words, which beam points to the UE, therefore, the SSB needs to be associated with the preamble, and the preamble is sent in the RO, and the SSB is associated with the RO. In the time domain, one subframe (FR1) or 60KHz slot (FR2) can have multiple PRACH slots, one PRACH slot can have multiple ROs, in the frequency domain, multiple ROs can exist at the same time, a cell has at most 8 (FR1) SSBs or 64 (FR2) SSBs, and the SSBs of the cell are in a corresponding relationship with the ROs, and the corresponding relationship can refer to the existing manner, and the embodiment of the present application does not limit this. Based on the corresponding relationship between the SSB and the RO, the embodiment of the present disclosure can determine the position order of each PRACH transmission in one-time multi-PRACH transmission according to the position order of the RO. Specifically, the RO corresponding to the same SSB can be used, or the RO in the same time domain can be used, or the RO corresponding to different SSBs and different time domains can be used, and the embodiment of the present disclosure does not limit this. The following will be described respectively for different scenarios.

[0120] Some embodiments of the present disclosure can be based on the scenario of one-time multi-PRACH transmission in one SSB, as shown in the following Figure 3 The multi-PRACH transmission method comprises the following steps:

[0121] In step 301, the terminal device maps M consecutive or equally spaced ROs starting from the Xth RO in the first RO associated with one SSB to M ROs in the first transmission opportunity of the multi-PRACH transmission, wherein X is the starting offset of the RO, and M is the maximum allowed PRACH transmission number of one-time multi-PRACH transmission.

[0122] In an embodiment of the present disclosure, the X value is a starting offset of the RO, and the starting offset X can be agreed by the system or configured by the network device and delivered to the terminal device. The embodiment of the present disclosure does not limit this. When agreed by the system, the terminal device determines the position order of each PRACH transmission in the multiple PRACH transmission based on the predetermined system agreement using the corresponding mapping rule. The value of X can be, for example, 0, 1, 2, 3, …, and the number with a value of 0 is numbered starting from 0.

[0123] In an embodiment of the present disclosure, the M is the maximum allowed PRACH transmission number in one multiple PRACH transmission, and the PRACH transmission number in the one multiple PRACH transmission is less than or equal to M. The interval number in the M equally spaced ROs can be agreed by the system or configured by the network device and delivered to the terminal device. The embodiment of the present disclosure does not limit this.

[0124] In step 302, the terminal device maps the second M consecutive or equally spaced ROs in the first RO to the M ROs in the second transmission opportunity of the multiple PRACH transmission, and maps other M consecutive or equally spaced ROs in the first RO to the M ROs in other transmission opportunities of the multiple PRACH transmission in a similar manner.

[0125] It should be noted that when the M consecutive or equally spaced ROs starting from the Xth RO in the first RO are mapped to the M ROs in the first transmission opportunity of the multiple PRACH transmission, a sequential mapping manner can be used, for example, the RO numbered 1 in the first OR is mapped to the first PRACH transmission in the first transmission opportunity of the multiple PRACH transmission; the 2nd (consecutive) or 3rd (interval number is 2) or 4th (interval number is 3) RO in the first OR is mapped to the second PRACH transmission in the first transmission opportunity of the multiple PRACH transmission, and the mapping is sequentially performed.

[0126] In an embodiment of the present disclosure, according to the comparison between the PRACH transmission number in one multiple PRACH transmission and the number of ROs associated with one SSB, if the number of ROs associated with one SSB is less than the PRACH transmission number in one multiple PRACH transmission, the SSB cannot be used by the terminal device for multiple PRACH transmission. If the number of ROs associated with one SSB is greater than or equal to the PRACH transmission number in one multiple PRACH transmission, the SSB can be used by the terminal device for multiple PRACH transmission, and when transmitting, the mapping of the PRACH transmission position order in one multiple PRACH transmission is performed according to the above rules.

[0127] Based on the above description, in some embodiments of the present disclosure, after completing the mapping of the ROs in the first RO to the ROs of the output opportunity of the multi-PRACH transmission once, the method further comprises at least one of the following steps:

[0128] In response to the number of ROs remaining in the first RO not satisfying the mapping of the ROs in the first RO to the ROs of the output opportunity of the multi-PRACH transmission next time, it is determined that the ROs remaining in the first RO cannot be used for the multi-PRACH transmission. Wherein, the number of ROs remaining in the first RO not satisfying the mapping of the ROs in the first RO to the ROs of the output opportunity of the multi-PRACH transmission next time means that the ROs remaining in the first RO cannot satisfy the PRACH transmissions in the multi-PRACH transmission, so the ROs remaining in the first RO cannot be used for the multi-PRACH transmission;

[0129] And

[0130] In response to the number of PRACH transmissions of the multi-PRACH transmission being less than or equal to the number of ROs remaining in the first RO, it is determined that the ROs remaining in the first RO can be used for the multi-PRACH transmission. Wherein, the number of PRACH transmissions of the multi-PRACH transmission being less than or equal to the number of ROs remaining in the first RO means that the number of ROs remaining in the first RO is greater than or equal to the number of PRACH transmissions of the multi-PRACH transmission, which can satisfy the PRACH transmissions in the multi-PRACH transmission, so the ROs remaining in the first RO can be used for the multi-PRACH transmission.

[0131] It should be noted that the above embodiments give the case that the number of ROs remaining in the first RO cannot be used for the next round of multi-PRACH transmission, and the case that the number of ROs remaining in the first RO can be used for the next round of multi-PRACH transmission. Those skilled in the art can understand that when implementing the scheme of the embodiments of the present disclosure, only one of the steps can be implemented, or both steps can be implemented. That is, when the number of ROs remaining in the first RO cannot be used for the next round of multi-PRACH transmission, the above steps can be used; when the number of ROs remaining in the first RO can be used for the next round of multi-PRACH transmission, the above steps can be used, or other steps can be used. Similarly, when the number of ROs remaining in the first RO can be used for the next round of multi-PRACH transmission, the above steps can be used; when the number of ROs remaining in the first RO cannot be used for the next round of multi-PRACH transmission, the above steps can be used, or other steps can be used. In other embodiments of the present disclosure, the same method can also be used; which will not be described in subsequent embodiments.

[0132] Based on the mapping of each PRACH transmission RO of the one-time multi-PRACH transmission described above, the mapping of each PRACH transmission RO of the multi-PRACH transmission, based on the number of first ROs associated with one SSB and the maximum allowed PRACH transmission times in one multi-PRACH transmission, there can be a group of multi-PRACH transmission opportunities, or there can be multiple groups of multi-PRACH transmission opportunities. When the terminal device performs multi-PRACH transmission, it can select any group of multi-PRACH transmission opportunities to perform, and the specific group is not limited by the embodiments of the present disclosure.

[0133] In some embodiments of the present disclosure, when the terminal device performs multi-PRACH transmission, the embodiments of the present disclosure provide a multi-PRACH transmission method, which can be implemented by but not limited to the following methods, as shown in the following method one and / or method two: Figure 3

[0134] Method one: in response to the terminal device selecting a target SSB for one-time multi-PRACH transmission, starting the one-time multi-PRACH transmission at the Yth RO of the multi-PRACH transmission opportunity corresponding to the target SSB, Y being the starting offset of the RO. Wherein, after the terminal device selects a target SSB, the multi-PRACH transmission opportunity corresponding to the target SSB is obtained, and one transmission opportunity is selected from the transmission opportunity for multi-PRACH transmission.

[0135] In the embodiments of the present disclosure, the related content of the terminal device selecting the target SSB can refer to any existing method, and the embodiments of the present disclosure do not limit this. The specific implementation method of selecting one transmission opportunity from the configured multi-PRACH transmission opportunity is also not limited by the embodiments of the present disclosure, and can be selected by the terminal according to the actual situation.

[0136] ​When a transmission opportunity is selected for a multi-PRACH transmission, the multi-PRACH transmission can start at the Yth RO of the transmission opportunity of the multi-PRACH transmission corresponding to the target SSB, where Y is the starting offset of each PRACH transmission in the multi-PRACH transmission in the M ROs of the transmission opportunity of the multi-PRACH transmission, and the value of Y can be determined by the system or set by the network device and delivered to the terminal device. The embodiments of the present disclosure do not limit this. When the value of Y is determined by the system, the terminal device obtains the value of Y based on the system determination and performs subsequent multi-PRACH transmission; when the value of Y is set by the network device and delivered to the terminal device, the terminal device receives the delivered value of Y and performs multi-PRACH transmission based on the value of Y. The value of Y for a multi-PRACH transmission performed by the terminal device can be, for example, 0, 1, 2, 3,..., and the number with a value of 0 is numbered starting from 0.

[0137] Embodiments of the present disclosure take a continuous interval as an example. If the terminal expects to use the transmission opportunity of the A th multi-PRACH transmission of the target SSB, the first PRACH transmission of the multi-PRACH transmission of the terminal is sent on the Yth RO of the A th multi-PRACH transmission opportunity of the target SSB, the second PRACH transmission of the multi-PRACH transmission is sent on the Y+1 th RO of the A th multi-PRACH transmission opportunity of the target SSB, and the M th PRACH transmission is sent on the Y+M-1 th RO of the A th multi-PRACH transmission opportunity.

[0138] It should be further noted that when the terminal device transmits the first PRACH transmission in a multi-PRACH transmission from the Yth RO of the target transmission opportunity in the transmission opportunity of the A th multi-PRACH transmission, if the value of M is 5 and the value of Y is 3, but the maximum number of PRACH transmissions in a multi-PRACH transmission is 4, i.e., a multi-PRACH transmission includes 3 PRACH transmissions, then there are only 3 ROs available in the M ROs in the target transmission opportunity, numbered 3, 4, and 5. Although the maximum number of PRACH transmissions in a multi-PRACH transmission is 4, which is less than M, the remaining available ROs cannot perform all PRACH transmissions in a multi-PRACH transmission. In this case, the terminal device sequentially performs the first PRACH transmission, the second PRACH transmission, and the third PRACH transmission in a multi-PRACH transmission starting from the 3rd RO. The fourth PRACH transmission is not performed.

[0139] In addition, in addition to the above case, the terminal performs each PRACH transmission in a multi-PRACH transmission starting from the Yth RO when using the A th transmission opportunity of the multi-PRACH transmission.

[0140] Option two: in response to the terminal device selecting a target SSB for a multi-PRACH transmission, starting the multi-PRACH transmission at any RO of a transmission opportunity of the multi-PRACH transmission corresponding to the target SSB.

[0141] In an embodiment of the present disclosure, the terminal device selects a target SSB, and the related content can refer to any of the existing methods, and the embodiment of the present disclosure does not limit this. The specific implementation method of selecting a transmission opportunity from the configured multi-PRACH transmission opportunity is also not limited by the embodiment of the present disclosure, and can be selected by the terminal according to the actual situation.

[0142] When a transmission opportunity is selected for a multi-PRACH transmission, the multi-PRACH transmission can be started at any RO of a transmission opportunity of the multi-PRACH transmission corresponding to the target SSB, as long as there are P consecutive or equally spaced ROs starting from the arbitrary RO on the multi-PRACH transmission opportunity. P is the number of PRACH transmissions required by the terminal for a multi-PRACH transmission. P can be a number of PRACH transmissions or a minimum number of PRACH transmissions defined by the network for a multi-PRACH transmission, and the embodiment of the present disclosure does not limit the specific implementation.

[0143] The specific transmission of each PRACH transmission of the related multi-PRACH transmission can refer to the related description of option one, which will not be repeated here. The difference from option one is that option one starts each PRACH transmission in a multi-PRACH transmission from a fixed RO position, and this option two starts each PRACH transmission in a multi-PRACH transmission from a RO that meets the conditions.

[0144] The above description is for the scenario of the terminal device side based on a multi-PRACH transmission at an SSB. The following provides a scenario of a multi-PRACH transmission at an SSB based on a multi-PRACH transmission, and a network device performs a multi-PRACH transmission method, as shown in Figure 3 The method includes:

[0145] Step 303: In response to a first RO associated with an SSB, the network device maps M consecutive or equally spaced ROs starting from an Xth RO in the first RO to M ROs in a first transmission opportunity of the multi-PRACH transmission. X is the starting offset of the RO, and M is the maximum allowed number of PRACH transmissions for a multi-PRACH transmission.

[0146] As described above, the network device needs to keep consistent with the terminal device on the order of the PRACH transmission positions in the multiple PRACH transmission based on one SSB scene, so the same configuration rule is used for mapping the ROs of the PRACH transmissions in the multiple PRACH transmission, which can be set by the network device and delivered to the terminal device, or can be agreed by the protocol, and specific embodiments of the present disclosure do not limit this.

[0147] In the above embodiment, the network device maps the first M consecutive or equally spaced ROs in the first RO to the M ROs in the first transmission opportunity of the multiple PRACH transmission in response to the first RO associated with one SSB, and the X is the starting offset of the RO, and the M is the description of the maximum allowed PRACH transmission number in one multiple PRACH transmission, which can refer to the description on the terminal device side, and the embodiments of the present disclosure do not repeat here.

[0148] In the above embodiment, the network device maps the first M consecutive or equally spaced ROs in the first RO to the M ROs in the first transmission opportunity of the multiple PRACH transmission in response to the first RO associated with one SSB, and the X is the starting offset of the RO, and the M is the description of the maximum allowed PRACH transmission number in one multiple PRACH transmission, which can refer to the description on the terminal device side, and the embodiments of the present disclosure do not repeat here.

[0149] In the above embodiment, the network device maps the first M consecutive or equally spaced ROs in the first RO to the M ROs in the first transmission opportunity of the multiple PRACH transmission in response to the first RO associated with one SSB, and the X is the starting offset of the RO, and the M is the description of the maximum allowed PRACH transmission number in one multiple PRACH transmission, which can refer to the description on the terminal device side, and the embodiments of the present disclosure do not repeat here.

[0150] In the embodiments of the present disclosure, according to the comparison between the PRACH transmission number in one multiple PRACH transmission and the number of ROs associated with one SSB, if the number of ROs associated with one SSB is less than the PRACH transmission number in one multiple PRACH transmission, the SSB cannot be used by the terminal device for multiple PRACH transmission. If the number of ROs associated with one SSB is greater than or equal to the PRACH transmission number in one multiple PRACH transmission, the SSB can be used by the terminal device for multiple PRACH transmission, and when transmitting, the mapping of the PRACH transmission position order in one multiple PRACH transmission is performed according to the above rule.

[0151] Based on the above description, in some embodiments of the present disclosure, after completing the mapping of the ROs in the first RO to the ROs of the output opportunity of the multi-PRACH transmission once, the network device further comprises at least one of the following steps:

[0152] In response to the number of remaining ROs in the first RO not satisfying the mapping of the ROs in the first RO to the ROs of the output opportunity of the multi-PRACH transmission next time, it is determined that the remaining ROs in the first RO cannot be used for the multi-PRACH transmission; wherein the number of remaining ROs in the first RO not satisfying the mapping of the ROs in the first RO to the ROs of the output opportunity of the multi-PRACH transmission next time means that the remaining ROs in the first RO cannot satisfy the PRACH transmissions in the multi-PRACH transmission, so the remaining ROs in the first RO cannot be used for the multi-PRACH transmission.

[0153] And

[0154] In response to the number of PRACH transmissions of the multi-PRACH transmission being less than or equal to the number of remaining ROs in the first RO, it is determined that the remaining ROs in the first RO can be used for the multi-PRACH transmission; wherein the number of PRACH transmissions of the multi-PRACH transmission being less than or equal to the number of remaining ROs in the first RO means that the number of remaining ROs in the first RO is greater than or equal to the number of PRACH transmissions of the multi-PRACH transmission, which can satisfy the PRACH transmissions in the multi-PRACH transmission, so the remaining ROs in the first RO can be used for the multi-PRACH transmission.

[0155] It should be noted that the above embodiments give the case that the number of remaining ROs in the first RO cannot be used for the next round of multi-PRACH transmission, and the case that the number of remaining ROs in the first RO can be used for the next round of multi-PRACH transmission. Those skilled in the art can understand that when implementing the scheme of the embodiments of the present disclosure, only one of the steps can be implemented, or both steps can be implemented. That is, when the number of remaining ROs in the first RO cannot be used for the next round of multi-PRACH transmission, the above steps can be used; when the number of remaining ROs in the first RO can be used for the next round of multi-PRACH transmission, the above steps can be used, or other steps can be used. Similarly, when the number of remaining ROs in the first RO can be used for the next round of multi-PRACH transmission, the above steps can be used; when the number of remaining ROs in the first RO cannot be used for the next round of multi-PRACH transmission, the above steps can be used, or other steps can be used.

[0156] The embodiment of the present disclosure provides a multi-PRACH transmission method. When multi-PRACH is transmitted on one SSB, in response to a first RO associated with one SSB, M consecutive or equally spaced ROs starting from the Xth RO in the first RO are mapped to M ROs in a first transmission opportunity of the multi-PRACH transmission, and the second M consecutive or equally spaced ROs in the first RO are mapped to M ROs in a second transmission opportunity of the multi-PRACH transmission. Similarly, the mapping of the other M consecutive or equally spaced ROs in the first RO to M ROs in other transmission opportunities of the multi-PRACH transmission is completed. The terminal performs multi-PRACH transmission starting from the Yth RO in a transmission opportunity of the multi-PRACH transmission or starting from any RO in a transmission opportunity of the multi-PRACH transmission, which guarantees the normal and orderly transmission of multiple Msg1 in the multi-PRACH transmission.

[0157] In some embodiments of the present disclosure, based on the scenario that one-time multi-PRACH transmission is performed on all time domain positions of the RO associated with one SSB, the position order of each PRACH transmission in one-time multi-PRACH transmission can be determined by the following methods, but is not limited to the following methods, and the specific implementation is as follows. Figure 4 As shown in the figure, the method is applied to the terminal device performing the multi-PRACH transmission method, and includes the following steps.

[0158] In step 401, in response to all time domain positions of a first RO associated with one SSB, the terminal device maps M consecutive or equally spaced time domain positions starting from the zth time domain position in the first RO to M time domain positions in a first transmission opportunity of the multi-PRACH transmission.

[0159] In the embodiment of the present disclosure, the z value is the starting offset of the RO, and the starting offset X can be determined by the system or configured and delivered to the terminal device by the network device. The embodiment of the present disclosure is not limited in this regard. When determined by the system, the terminal device determines the position order of each PRACH transmission in the multi-PRACH transmission based on the corresponding mapping rule of the predetermined system determination. The value of X can be, for example, 0, 1, 2, 3, …, and the number with a value of 0 starts from 0.

[0160] In the embodiment of the present disclosure, M is the maximum allowed PRACH transmission number of one-time multi-PRACH transmission, and the PRACH transmission number in the one-time multi-PRACH transmission is less than or equal to M. The interval number of the M equally spaced ROs can be determined by the system or configured and delivered to the terminal device by the network device. The embodiment of the present disclosure is not limited in this regard.

[0161] Step 402, mapping the second M consecutive or equally spaced time domain positions in all time domain positions of the first RO to M time domain positions in the second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of M consecutive or equally spaced time domain positions in other time domain positions of the first RO to M time domain positions in other transmission opportunities of the multi-PRACH transmission.

[0162] It should be noted that when mapping the M consecutive or equally spaced ROs from the z-th RO in all time domain positions of the first RO to M ROs in the first transmission opportunity of the multi-PRACH transmission, a sequential mapping method can be used, for example, the first PRACH transmission in the first transmission opportunity of the multi-PRACH transmission is mapped to the RO numbered 1 in all time domain positions of the first OR; the second PRACH transmission in the first transmission opportunity of the multi-PRACH transmission is mapped to the 2nd (consecutive) or 3rd (interval number is 2) or 4th (interval number is 3) RO in all time domain positions of the first OR, and so on.

[0163] In an embodiment of the present disclosure, according to the comparison between the number of PRACH transmission times in one multi-PRACH transmission and the number of all time domain positions of the first RO associated with one SSB, if the number of all time domain positions of the first RO associated with one SSB is less than the number of PRACH transmission times in one multi-PRACH transmission, the SSB cannot be used by the terminal device for multi-PRACH transmission. If the number of all time domain positions of the first RO associated with one SSB is greater than or equal to the number of PRACH transmission times in one multi-PRACH transmission, the SSB can be used by the terminal device for multi-PRACH transmission, and when transmitting, the determination of the order of PRACH transmission positions in one multi-PRACH transmission should be made according to the above rules.

[0164] Based on the above description, in some embodiments of the present disclosure, after the mapping of the time domain positions of the first RO to the time domain positions of the output opportunity of the multi-PRACH transmission is completed, the method further includes at least one of the following steps:

[0165] determining that the remaining time domain positions in the first RO cannot be used for the multi-PRACH transmission in response to the number of the remaining time domain positions in the first RO not satisfying mapping of the time domain positions of the first RO in the next round to the time domain positions of the RO in the output opportunity of the multi-PRACH transmission. The number of the remaining time domain positions of the first RO in the first RO not satisfying mapping of the first RO in the next round to the RO in the output opportunity of the multi-PRACH transmission in the first RO indicates that the remaining time domain positions in the first RO cannot satisfy each PRACH transmission in the multi-PRACH transmission, and thus the remaining time domain positions in the first RO cannot be used for the multi-PRACH transmission.

[0166] and

[0167] determining that the remaining time domain positions in the first RO can be used for the multi-PRACH transmission in response to the number of PRACH transmissions in the multi-PRACH transmission being less than or equal to the number of the remaining time domain positions in the first RO. The number of PRACH transmissions in the multi-PRACH transmission being less than or equal to the number of the remaining time domain positions in the first RO indicates that the number of the remaining time domain positions in the first RO is greater than or equal to the number of PRACH transmissions in the multi-PRACH transmission, can satisfy each PRACH transmission in the multi-PRACH transmission, and thus the remaining time domain positions in the first RO can be used for the multi-PRACH transmission.

[0168] It should be noted that the above embodiments give the case that the number of the remaining time domain positions in the first RO cannot be used for the next round of the multi-PRACH transmission, and the case that the number of the remaining time domain positions in the first RO can be used for the next round of the multi-PRACH transmission. Those skilled in the art can understand that, when implementing the scheme of the embodiments of the present disclosure, only any one of the steps can be implemented, or both of the above steps can be implemented. That is, when the number of the remaining time domain positions in the first RO cannot be used for the next round of the multi-PRACH transmission, the above steps can be used; and when the number of the remaining time domain positions in the first RO can be used for the next round of the multi-PRACH transmission, the above steps can be used or other steps can be used. Similarly, when the number of the remaining time domain positions in the first RO can be used for the next round of the multi-PRACH transmission, the above steps can be used; and when the number of the remaining time domain positions in the first RO cannot be used for the next round of the multi-PRACH transmission, the above steps can be used or other steps can be used.

[0169] Based on the mapping of each PRACH transmission RO of the one-time multi-PRACH transmission described above, the mapping of each PRACH transmission RO of the multi-PRACH transmission, based on the number of the number of time domain positions of the first RO associated with one SSB and the maximum allowed PRACH transmission times in the one-time multi-PRACH transmission, there can be a group of multi-PRACH transmission opportunities, or there can be multiple groups of multi-PRACH transmission opportunities. When the terminal device performs multi-PRACH transmission, it can select any group of multi-PRACH transmission opportunities to perform, and the specific group is not limited by the embodiments of the present disclosure.

[0170] In some embodiments of the present disclosure, when the terminal device performs multi-PRACH transmission, the embodiments of the present disclosure provide a multi-PRACH transmission method, which can be implemented by but not limited to the following methods, as shown in the following method one, method two and method three: Figure 4

[0171] Method one: in response to the terminal device selecting a target SSB for one-time multi-PRACH transmission, starting the one-time multi-PRACH transmission at the Yth time domain position of the multi-PRACH transmission opportunity corresponding to the target SSB, and Y is the starting offset of the RO.

[0172] Among them, after the terminal device selects a target SSB, the multi-PRACH transmission opportunity corresponding to the target SSB is obtained, and one transmission opportunity is selected from the transmission opportunity for multi-PRACH transmission.

[0173] In the embodiments of the present disclosure, the related content of the terminal device selecting the target SSB can refer to any existing method, and the embodiments of the present disclosure do not limit this. The specific implementation method of selecting one transmission opportunity from the configured multi-PRACH transmission opportunity is also not limited by the embodiments of the present disclosure, and can be selected by the terminal according to the actual situation.

[0174] ​When a transmission opportunity is selected for a multi-PRACH transmission, the multi-PRACH transmission can be started at the Yth time domain position of the transmission opportunity of the multi-PRACH transmission corresponding to the target SSB, where Y is the starting offset of each PRACH transmission in the multi-PRACH transmission in the M ROs of the transmission opportunity of the multi-PRACH transmission, and the Y value can be determined by the system or set by the network device and delivered to the terminal device. The embodiments of the present disclosure do not limit the Y value. When the Y value is determined by the system, the terminal device obtains the Y value based on the system determination and performs subsequent multi-PRACH transmission. When the Y value is set by the network device and delivered to the terminal device, the terminal device receives the Y value delivered by the terminal and performs multi-PRACH transmission based on the Y value. The Y value of the multi-PRACH transmission performed by the terminal device can be 0, 1, 2, 3, and the like, and the number of the Y value of 0 starts from 0.

[0175] Option 2: In response to the terminal device selecting a target SSB for a multi-PRACH transmission, the multi-PRACH transmission is started at any time domain position of the transmission opportunity of the multi-PRACH transmission corresponding to the target SSB.

[0176] In the embodiments of the present disclosure, the terminal device selects the target SSB, and the related content can refer to any of the existing methods. The embodiments of the present disclosure do not limit the selection of the target SSB. The terminal device can select a transmission opportunity from the configured multi-PRACH transmission opportunity.

[0177] When a transmission opportunity is selected for a multi-PRACH transmission, the multi-PRACH transmission can be started at any time domain position of the transmission opportunity of the multi-PRACH transmission corresponding to the target SSB, as long as the number of time domain positions starting from the any time domain position on the multi-PRACH transmission opportunity is greater than or equal to the number of time domain positions required by the terminal device for a multi-PRACH transmission.

[0178] The third mode: in response to the terminal device performing the one multi-PRACH transmission in one time domain position of one multi-PRACH transmission opportunity, N PRACHs in the one multi-PRACH transmission are transmitted using N continuous or equally spaced ROs starting from the pth RO in one time domain position of one multi-PRACH transmission opportunity. Wherein, the p is the starting offset of the RO. The P value can be agreed by the system, or can be set by the network device and delivered to the terminal device, and specific embodiments of the present disclosure do not limit this. When the P value is agreed by the system, the terminal device obtains the p value based on the system agreement, and performs subsequent multi-PRACH transmission; when the p value is set by the network device and delivered to the terminal device, the terminal device receives the p value delivered by the terminal, and performs multi-PRACH transmission based on the p value. The value of Y of the one multi-PRACH transmission performed by the terminal device can be, for example, 0, 1, 2, 3, …, and the number with a value of 0 is numbered starting from 0.

[0179] In an embodiment of the present disclosure, the N is the maximum allowed PRACH transmission number of one multi-PRACH transmission, and the PRACH transmission number in the one multi-PRACH transmission is less than or equal to N. The interval number of the N equally spaced ROs can be agreed by the system, or can be configured by the network device and delivered to the terminal device, and specific embodiments of the present disclosure do not limit this.

[0180] The above description is for the terminal device side based on one multi-PRACH transmission in all time domain positions of the first RO associated with one SSB. The following provides a scenario based on one multi-PRACH transmission in all time domain positions of the first RO associated with one SSB, a multi-PRACH transmission method of the network device side, as shown in the following formula: Figure 4 The method comprises:

[0181] Step 403: in response to all time domain positions of the first RO associated with one SSB, mapping M continuous or equally spaced time domain positions starting from the zth time domain position in all time domain positions in the first RO to M time domain positions in the first transmission opportunity of the multi-PRACH transmission, the z is the starting offset of the time domain position, and the M is the maximum allowed PRACH transmission number of one multi-PRACH transmission.

[0182] As described above, the network device needs to keep consistent with the terminal device on the order of the PRACH transmission positions in the multiple PRACH transmissions in the scenario of determining the order of the PRACH transmission positions of the multiple PRACH transmissions based on all time domain positions of the first RO associated with one SSB, so the same configuration rule is used for mapping the ROs of the PRACH transmissions in the multiple PRACH transmissions, which can be set by the network device and delivered to the terminal device, or can be agreed by the protocol, and specific embodiments of the present disclosure do not limit this.

[0183] In the above description, the network device maps all time domain positions in the first RO to the M time domain positions in the first transmission opportunity of the multiple PRACH transmissions, and the M time domain positions are continuous or equally spaced from the z-th time domain position, where z is the starting offset of the time domain position, and M is the maximum allowed PRACH transmission number of one multiple PRACH transmission. The M time domain positions in the first RO are mapped to the M ROs in the first transmission opportunity of the multiple PRACH transmissions, and the M ROs are continuous or equally spaced from the X-th RO, where z is the starting offset of the RO, and M is the maximum allowed PRACH transmission number of one multiple PRACH transmission. For related descriptions of the mapping of the M time domain positions in the first RO to the M ROs in the first transmission opportunity of the multiple PRACH transmissions, reference can be made to the related descriptions on the terminal device side, and the embodiments of the present disclosure will not be repeated here.

[0184] In step 404, the second M continuous or equally spaced time domain positions in the first RO are mapped to the M time domain positions in the second transmission opportunity of the multiple PRACH transmissions, and the mapping of the M continuous or equally spaced time domain positions in the other time domain positions in the first RO to the M time domain positions in the other transmission opportunities of the multiple PRACH transmissions is completed in the same way.

[0185] It needs to be explained by the embodiments of the present disclosure that the second M continuous or equally spaced time domain positions in the first RO are mapped to the M ROs in the second transmission opportunity of the multiple PRACH transmissions, and the mapping of the other M continuous or equally spaced time domain positions in the first RO to the M ROs in the other transmission opportunities of the multiple PRACH transmissions is completed in the same way. For related descriptions of the mapping of the M time domain positions in the first RO to the M ROs in the second transmission opportunity of the multiple PRACH transmissions, reference can be made to the related descriptions on the terminal device side, and the embodiments of the present disclosure will not be repeated here.

[0186] In the embodiments of the present disclosure, according to the comparison between the number of all time domain positions in the first RO associated with one SSB and the number of PRACH transmissions in one multi-PRACH transmission, if the number of all time domain positions in the first RO associated with one SSB is less than the number of PRACH transmissions in one multi-PRACH transmission, the SSB cannot be used by the terminal device for multi-PRACH transmission. If the number of all time domain positions in the first RO associated with one SSB is greater than or equal to the number of PRACH transmissions in one multi-PRACH transmission, the SSB can be used by the terminal device for multi-PRACH transmission, and when transmitting, the mapping of the order of PRACH transmission positions in one multi-PRACH transmission is performed according to the above rules.

[0187] Based on the above description, in some embodiments of the present disclosure, after the network device completes the mapping of the time domain positions of one first RO to the time domain positions of the output opportunities of the multi-PRACH transmission, the method further comprises at least one of the following steps:

[0188] In response to the number of remaining time domain positions in the first RO not satisfying the mapping of the time domain positions of the first RO to the time domain positions of the output opportunities of one multi-PRACH transmission in the next round, it is determined that the remaining time domain positions in the first RO cannot be used for the multi-PRACH transmission. Wherein, the number of remaining time domain positions in the first RO not satisfying the mapping of the time domain positions of the first Ro to the RO of the output opportunities of one multi-PRACH transmission in the next round means that the remaining time domain positions in the first RO cannot satisfy the PRACH transmission in the multi-PRACH transmission, so the remaining time domain positions in the first RO cannot be used for the multi-PRACH transmission;

[0189] and

[0190] In response to the number of PRACH transmissions in one multi-PRACH transmission being less than or equal to the number of remaining time domain positions in the first RO, it is determined that the remaining time domain positions in the first RO can be used for the multi-PRACH transmission. Wherein, the number of PRACH transmissions in one multi-PRACH transmission being less than or equal to the number of remaining time domain positions in the first RO means that the number of remaining time domain positions in the first RO is greater than or equal to the number of PRACH transmissions in the multi-PRACH transmission, which can satisfy the PRACH transmission in the multi-PRACH transmission, so the remaining time domain positions in the first RO can be used for the multi-PRACH transmission.

[0191] It should be noted that the above embodiments give the case that the number of time domain positions remaining in the first RO cannot be used for the next round of multi-PRACH transmission, and the case that the number of time domain positions remaining in the first RO can be used for the next round of multi-PRACH transmission. Those skilled in the art can understand that when implementing the scheme of the embodiments of the present disclosure, only any one of the steps can be implemented, or both of the above steps can be implemented. That is, when the number of time domain positions remaining in the first RO cannot be used for the next round of multi-PRACH transmission, the above steps can be used; and when the number of time domain positions remaining in the first RO can be used for the next round of multi-PRACH transmission, both the above steps and other steps can be used. Similarly, when the number of time domain positions remaining in the first RO can be used for the next round of multi-PRACH transmission, the above steps can be used; and when the number of time domain positions remaining in the first RO cannot be used for the next round of multi-PRACH transmission, both the above steps and other steps can be used.

[0192] The embodiments of the present disclosure provide a multi-PRACH transmission method. When multi-PRACH is transmitted in all time domain positions of a first RO associated with one SSB, in response to all time domain positions of the first RO associated with one SSB, all M consecutive or equally spaced time domain positions in the first RO from the zth time domain position are mapped to M time domain positions in a first transmission opportunity of the multi-PRACH transmission, and the second M consecutive or equally spaced time domain positions in all time domain positions of the first RO are mapped to M time domain positions in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the M consecutive or equally spaced time domain positions in other time domain positions in the first RO to the M time domain positions in other transmission opportunities of the multi-PRACH transmission. The terminal performs multi-PRACH transmission from the zth time domain position in a transmission opportunity of the multi-PRACH transmission, or starts multi-PRACH transmission at any time domain position in a transmission opportunity of the multi-PRACH transmission, or uses N consecutive or equally spaced ROs starting from the pth RO to send N PRACHs in the multi-PRACH transmission at one time domain position of one multi-PRACH transmission opportunity, which guarantees the normal and orderly transmission of multiple Msg1s in multi-PRACH transmission.

[0193] Some embodiments of the present disclosure can be based on the scenario that multiple PRACH transmissions cannot be performed across RO time domain positions, i.e., the scenario that multiple PRACH transmissions cannot be performed using ROs in different time domain positions, i.e., the scenario that multiple PRACH transmissions can be performed using ROs associated with one time domain position. The position order of each PRACH transmission in the multiple PRACH transmission method can be determined according to the position order of the random access channel (RACH) occasion (RO), which can be implemented by, but not limited to, the following method. The multiple PRACH transmission method is specifically as shown in the following. Figure 5 The terminal device performs the method, which includes the following steps.

[0194] In step 501, in response to determining that the second RO associated with one time domain position, M consecutive or equally spaced ROs starting from the Xth RO in the second RO are mapped to M ROs in the first transmission opportunity of the multiple PRACH transmission.

[0195] In the embodiments of the present disclosure, the value of x is the starting offset of the RO. The starting offset X can be agreed by the system or configured by the network device and delivered to the terminal device. The embodiments of the present disclosure do not limit this. When agreed by the system, the terminal device determines the position order of each PRACH transmission in the multiple PRACH transmission based on the predetermined system agreement using the corresponding mapping rule. The value of X can be, for example, 0, 1, 2, 3, …, and the number with a value of 0 is numbered starting from 0.

[0196] In the embodiments of the present disclosure, M is the maximum allowed PRACH transmission number of the multiple PRACH transmission. The PRACH transmission number in the multiple PRACH transmission is less than or equal to M. The interval number of the M equally spaced ROs can be agreed by the system or configured by the network device and delivered to the terminal device. The embodiments of the present disclosure do not limit this.

[0197] In step 502, the second M consecutive or equally spaced ROs in the second RO are mapped to M ROs in the second transmission opportunity of the multiple PRACH transmission. Similarly, the mapping of the other M consecutive or equally spaced ROs in the second RO to M ROs in the other transmission opportunities of the multiple PRACH transmission is completed.

[0198] It should be noted that, when mapping the M consecutive or equally spaced ROs in the second RO associated with the one time domain position from the Xth RO to the M ROs in the first transmission opportunity of the multi-PRACH transmission, a sequential mapping manner can be adopted, for example, the RO numbered 1 in the second RO associated with the one time domain position is mapped to the first PRACH transmission in the first transmission opportunity of the multi-PRACH transmission; the 2nd (consecutive) or 3rd (interval number is 2) or 4th (interval number is 3) RO in the second RO associated with the one time domain position is mapped to the second PRACH transmission in the first transmission opportunity of the multi-PRACH transmission, and the like.

[0199] In an embodiment of the present disclosure, according to the comparison between the number of PRACH transmissions in one multi-PRACH transmission and the number of second ROs associated with one time domain position, if the number of second ROs associated with one time domain position is less than the number of PRACH transmissions in one multi-PRACH transmission, the remaining ROs in the second RO associated with one time domain position cannot be used by the terminal device for multi-PRACH transmission. If the number of second ROs associated with one time domain position is greater than or equal to the number of PRACH transmissions in one multi-PRACH transmission, the remaining ROs in the second RO associated with one time domain position can be used by the terminal device for multi-PRACH transmission, and when transmitting, the determination of the order of PRACH transmission positions in one multi-PRACH transmission is performed according to the above rules.

[0200] Based on the above description, in some embodiments of the present disclosure, after completing the mapping of the second RO to the RO of the output opportunity of the multi-PRACH transmission, the method further comprises at least one of the following steps:

[0201] In response to the number of remaining ROs in the second RO not meeting the mapping of the second RO to the RO of the output opportunity of the multi-PRACH transmission in the next round, it is determined that the remaining ROs in the second RO cannot be used for the multi-PRACH transmission. Wherein, the number of remaining ROs in the second RO not meeting the mapping of the second RO to the RO of the output opportunity of the multi-PRACH transmission in the next round means that the remaining ROs in the second RO cannot meet the multi-PRACH transmission, so the remaining ROs in the second RO cannot be used for the multi-PRACH transmission;

[0202] and

[0203] In response to the number of PRACH transmissions of the one-time multi-PRACH transmission being less than or equal to the number of remaining ROs in the second RO, it is determined that the remaining ROs in the second RO can be used for the multi-PRACH transmission. Where the number of PRACH transmissions of the multi-PRACH transmission is less than or equal to the number of remaining ROs in the second RO, it indicates that the number of remaining ROs in the second RO is greater than or equal to the number of PRACH transmissions of the multi-PRACH transmission, which can meet the multi-PRACH transmission of each PRACH transmission, so the remaining ROs in the second RO can perform the multi-PRACH transmission.

[0204] It should be noted that the above embodiments give the case where the number of remaining ROs in the second RO cannot be used for the next round of multi-PRACH transmission, and the case where the number of remaining ROs in the second RO can be used for the next round of multi-PRACH transmission. Those skilled in the art can understand that when implementing the scheme of the embodiments of the present disclosure, only one of the steps can be implemented, or both steps can be implemented. That is, when the number of remaining ROs in the second RO cannot be used for the next round of multi-PRACH transmission, the above steps can be used; and when the number of remaining ROs in the second RO can be used for the next round of multi-PRACH transmission, the above steps can be used, or other steps can be used. Similarly, when the number of remaining ROs in the second RO can be used for the next round of multi-PRACH transmission, the above steps can be used; and when the number of remaining ROs in the second RO cannot be used for the next round of multi-PRACH transmission, the above steps can be used, or other steps can be used.

[0205] Based on the mapping of each PRACH transmission RO of the one-time multi-PRACH transmission, the mapping of each PRACH transmission RO of the multi-PRACH transmission is based on the number of associated second ROs in a time domain position and the maximum allowed number of PRACH transmissions in the one-time multi-PRACH transmission. There can be a group of multi-PRACH transmission opportunities, or there can be multiple groups of multi-PRACH transmission opportunities. The terminal device can select any group of multi-PRACH transmission opportunities when performing multi-PRACH transmission. The specific group is not limited by the embodiments of the present disclosure.

[0206] In some embodiments of the present disclosure, when the terminal device performs multi-PRACH transmission, the embodiments of the present disclosure provide a multi-PRACH transmission method, which can be implemented by but not limited to the following method, as shown in Figure 5 The method includes the following mode one and / or mode two:

[0207] Manner one: in response to the terminal device selecting a target time domain position for a multi-PRACH transmission, starting the multi-PRACH transmission at the Yth RO of a transmission opportunity of a multi-PRACH transmission corresponding to the target time domain position, where Y is the starting offset of the RO. When the terminal device selects a target SSB, the transmission opportunity of the multi-PRACH transmission corresponding to the target SSB is obtained, and a transmission opportunity is selected from the transmission opportunity for multi-PRACH transmission.

[0208] In the embodiments of the present disclosure, the specific implementation manner of selecting a transmission opportunity from the configured transmission opportunity of the multi-PRACH transmission is not limited, and the terminal can select according to the actual situation.

[0209] When a transmission opportunity is selected for a multi-PRACH transmission, the multi-PRACH transmission can start at the Yth RO of a transmission opportunity of a multi-PRACH transmission corresponding to the target time domain position, where Y is the starting offset of each PRACH transmission in the M ROs of the transmission opportunity of the multi-PRACH transmission. The value of Y can be agreed by the system or set by the network device and delivered to the terminal device. The embodiments of the present disclosure do not limit this. When the value of Y is agreed by the system, the terminal device obtains the value of Y based on the system agreement for subsequent multi-PRACH transmission; when the value of Y is set by the network device and delivered to the terminal device, the terminal device receives the Y value delivered by the terminal and performs multi-PRACH transmission based on the Y value. The value of Y for a multi-PRACH transmission performed by the terminal device can be, for example, 0, 1, 2, 3, …, and the number with a value of 0 starts with 0.

[0210] Manner two: in response to the terminal device selecting a target time domain position for a multi-PRACH transmission, starting the multi-PRACH transmission at any RO of a transmission opportunity of a multi-PRACH transmission corresponding to the target time domain position.

[0211] In the embodiments of the present disclosure, the specific implementation manner of selecting a transmission opportunity from the configured transmission opportunity of the multi-PRACH transmission is not limited, and the terminal can select according to the actual situation.

[0212] When a transmission opportunity is selected for a multi-PRACH transmission, the continuous or equally spaced P ROs starting from any RO of a multi-PRACH transmission opportunity corresponding to the target time domain position can be performed, as long as there are P continuous or equally spaced ROs starting from the RO on the multi-PRACH transmission opportunity. P is the number of PRACH transmissions required by the terminal for a multi-PRACH transmission. P can be the number of PRACH transmissions or the minimum number of PRACH transmissions of a multi-PRACH transmission defined by the network.

[0213] The above description is for the terminal device side based on the second RO associated with a multi-PRACH transmission at a time domain position. The following provides a multi-PRACH transmission method based on the second RO associated with a multi-PRACH transmission at a time domain position, network device side, as shown in Figure 5 The method comprises:

[0214] Step 503, in response to the second RO associated with a time domain position, mapping M continuous or equally spaced ROs starting from the Xth RO in the second RO to M ROs in the first transmission opportunity of the multi-PRACH transmission.

[0215] As described above, the network device needs to keep consistent with the terminal device on the order of the positions of each PRACH transmission in the multi-PRACH transmission when determining the order of the positions of each PRACH transmission in the multi-PRACH transmission based on the second RO associated with a time domain position. Therefore, the same configuration rule is used for mapping the ROs of each PRACH transmission in the multi-PRACH transmission, which can be set by the network device and delivered to the terminal device, or can be agreed by the protocol. Specific embodiments of the present disclosure do not limit this.

[0216] In response to the second RO associated with a time domain position, the network device maps M continuous or equally spaced ROs starting from the Xth RO in the second RO to M ROs in the first transmission opportunity of the multi-PRACH transmission. X is the starting offset of the time domain position, and M is the maximum allowed number of PRACH transmissions for a multi-PRACH transmission. The description of mapping M continuous or equally spaced ROs starting from the Xth RO in the second RO to M ROs in the first transmission opportunity of the multi-PRACH transmission, X is the starting offset of the RO, and M is the maximum allowed number of PRACH transmissions for a multi-PRACH transmission, can refer to the related description of the terminal device side. Embodiments of the present disclosure will not be repeated here.

[0217] Step 504, the network device maps the second M consecutive or equally spaced ROs in the second RO to the M ROs in the second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the second RO to the M ROs in the other transmission opportunities of the multi-PRACH transmission.

[0218] It should be noted that the embodiments of the present disclosure need to be explained that the mapping of the M consecutive or equally spaced ROs in the second RO to the M ROs in the second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the second RO to the M ROs in the other transmission opportunities of the multi-PRACH transmission, can refer to the related description of the terminal device side, and the embodiments of the present disclosure will not be repeated here.

[0219] In the embodiments of the present disclosure, according to the comparison between the number of PRACH transmissions in one multi-PRACH transmission and the number of second ROs associated with one time domain position, if the number of second ROs associated with one time domain position is less than the number of PRACH transmissions in one multi-PRACH transmission, the remaining ROs in the second ROs associated with one time domain position cannot be used by the terminal device for multi-PRACH transmission. If the number of second ROs associated with one time domain position is greater than or equal to the number of PRACH transmissions in one multi-PRACH transmission, the remaining ROs in the second ROs associated with one time domain position can be used by the terminal device for multi-PRACH transmission, and when transmitting, the determination of the order of PRACH transmission positions in one multi-PRACH transmission should be made according to the above rules.

[0220] Based on the above description, in some embodiments of the present disclosure, after completing the mapping of one second RO to the RO of the output opportunity of the multi-PRACH transmission, the method further comprises at least one of the following steps:

[0221] In response to the number of remaining ROs in the second RO not meeting the mapping of the next round of the second RO to the RO of the output opportunity of the multi-PRACH transmission, it is determined that the remaining ROs in the second RO cannot be used for the multi-PRACH transmission. Wherein, the number of remaining ROs in the second RO not meeting the mapping of the next round of the second RO to the RO of the output opportunity of the multi-PRACH transmission means that the remaining ROs in the second RO cannot meet the multi-PRACH transmission, so the remaining ROs in the second RO cannot be used for the multi-PRACH transmission;

[0222] And

[0223] In response to the number of PRACH transmissions of the multiple PRACH transmissions being less than or equal to the number of remaining ROs in the second RO, it is determined that the remaining ROs in the second RO can be used for the multiple PRACH transmissions. In this case, the number of remaining ROs in the second RO is greater than or equal to the number of PRACH transmissions of the multiple PRACH transmissions, which can meet the multiple PRACH transmissions.

[0224] It should be noted that the above embodiments give the case that the number of remaining ROs in the second RO cannot be used for the next round of multiple PRACH transmissions, and the case that the number of remaining ROs in the second RO can be used for the next round of multiple PRACH transmissions. Those skilled in the art can understand that when implementing the scheme of the embodiments of the present disclosure, only one of the steps can be implemented, or both steps can be implemented. That is, when the number of remaining ROs in the second RO cannot be used for the next round of multiple PRACH transmissions, the above steps can be used; when the number of remaining ROs in the second RO can be used for the next round of multiple PRACH transmissions, the above steps can be used or other steps can be used. Similarly, when the number of remaining ROs in the second RO can be used for the next round of multiple PRACH transmissions, the above steps can be used; when the number of remaining ROs in the second RO cannot be used for the next round of multiple PRACH transmissions, the above steps can be used or other steps can be used.

[0225] The embodiments of the present disclosure provide a multiple PRACH transmission method. When multiple PRACH transmissions are performed based on a second RO associated with a time domain position, in response to the second RO associated with the time domain position, M consecutive or equally spaced ROs in the second RO starting from an Xth RO are mapped to M ROs in a first transmission opportunity of the multiple PRACH transmissions, and the second M consecutive or equally spaced ROs in the second RO are mapped to M ROs in a second transmission opportunity of the multiple PRACH transmissions, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the second RO to M ROs in other transmission opportunities of the multiple PRACH transmissions. The terminal performs multiple PRACH transmissions starting from a Yth RO in a transmission opportunity of the multiple PRACH transmissions, or starting from any RO in a transmission opportunity of the multiple PRACH transmissions, which guarantees the normal and orderly transmission of multiple Msg1 in the multiple PRACH transmissions.

[0226] Some embodiments of the present disclosure can be based on the scenario that one-time multi-PRACH transmission can be across SSBs, i.e., based on the third RO in the SSB-RO association period, the position order of each PRACH transmission in one-time multi-PRACH transmission can be determined by the following method, which is not limited to the following method, and the multi-PRACH transmission method is specifically as follows Figure 6 As shown in the method, the terminal device performs the method, which includes the following steps.

[0227] Step 601, in response to the third RO in the SSB-RO association period, mapping M consecutive or equally spaced ROs starting from the Xth RO in the third RO to M ROs in the first transmission opportunity of the multi-PRACH transmission.

[0228] In embodiments of the present disclosure, the value of x is the starting offset of RO, and the starting offset X can be agreed by the system or configured by the network device and delivered to the terminal device. Embodiments of the present disclosure do not limit this. When agreed by the system, the terminal device determines the position order of each PRACH transmission in multi-PRACH transmission based on the corresponding mapping rule of the predetermined system agreement. The value of X can be, for example, 0, 1, 2, 3, …, and the number with a value of 0 starts with 0.

[0229] In embodiments of the present disclosure, M is the maximum allowed PRACH transmission number of one-time multi-PRACH transmission, and the PRACH transmission number in one-time multi-PRACH transmission is less than or equal to M. The interval number of the M equally spaced ROs can be agreed by the system or configured by the network device and delivered to the terminal device. Embodiments of the present disclosure do not limit this.

[0230] Step 602, mapping the second M consecutive or equally spaced ROs in the third RO to M ROs in the second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the third RO to M ROs in the other transmission opportunities of the multi-PRACH transmission.

[0231] It should be noted that, when mapping the M consecutive or equally spaced ROs starting from the Xth RO in the third RO in the SSB-RO association period to the M ROs in the first transmission opportunity of the multi-PRACH transmission, a sequential mapping manner can be adopted, for example, the RO numbered 1 in the third RO in the SSB-RO association period is mapped to the first PRACH transmission in the first transmission opportunity of the multi-PRACH transmission; the 2nd (consecutive) or 3rd (interval number is 2) or 4th (interval number is 3) RO in the third RO in the SSB-RO association period is mapped to the second PRACH transmission in the first transmission opportunity of the multi-PRACH transmission, and the like.

[0232] In an embodiment of the present disclosure, according to a comparison between the number of PRACH transmissions in one multi-PRACH transmission and the number of third ROs in the SSB-RO association period, if the number of third ROs in the SSB-RO association period is less than the number of PRACH transmissions in one multi-PRACH transmission, the remaining ROs in the third ROs in the SSB-RO association period cannot be used by the terminal device for multi-PRACH transmission. If the number of third ROs in the SSB-RO association period is greater than or equal to the number of PRACH transmissions in one multi-PRACH transmission, the remaining ROs in the third ROs in the SSB-RO association period can be used by the terminal device for multi-PRACH transmission, and the determination of the order of PRACH transmission positions in one multi-PRACH transmission is performed according to the above rules.

[0233] Based on the above description, in some embodiments of the present disclosure, after completing the mapping of the third ROs to the ROs in the output opportunity of the multi-PRACH transmission, the method further comprises at least one of the following steps:

[0234] In response to the number of remaining ROs in the third ROs not meeting the mapping of the next round of third ROs to the ROs in the output opportunity of the multi-PRACH transmission, it is determined that the remaining ROs in the third ROs cannot be used for the multi-PRACH transmission. Wherein, the number of remaining ROs in the third ROs not meeting the mapping of the next round of third ROs to the ROs in the output opportunity of the multi-PRACH transmission means that the remaining ROs in the third ROs cannot meet the multi-PRACH transmission, so the remaining ROs in the third ROs cannot be used for the multi-PRACH transmission;

[0235] and in response to the number of PRACH transmissions of the multi-PRACH transmission being less than or equal to the number of remaining ROs in the third RO, determining that the remaining ROs in the third RO can be used for the multi-PRACH transmission. Where the number of PRACH transmissions of the multi-PRACH transmission is less than or equal to the number of remaining ROs in the third RO, it means that the number of remaining ROs in the third RO is greater than or equal to the number of PRACH transmissions of the multi-PRACH transmission, which can meet the multi-PRACH transmission of each PRACH transmission, so the remaining ROs in the third RO can perform the multi-PRACH transmission.

[0236] It should be noted that the above embodiments give the case where the number of remaining ROs in the third RO cannot be used for the next round of multi-PRACH transmission, and the case where the number of remaining ROs in the third RO can be used for the next round of multi-PRACH transmission. Those skilled in the art can understand that when implementing the scheme of the embodiments of the present disclosure, only one of the steps can be implemented, or both steps can be implemented. That is, when the number of remaining ROs in the third RO cannot be used for the next round of multi-PRACH transmission, the above steps can be used; and when the number of remaining ROs in the third RO can be used for the next round of multi-PRACH transmission, the above steps can be used, or other steps can be used. Similarly, when the number of remaining ROs in the third RO can be used for the next round of multi-PRACH transmission, the above steps can be used; and when the number of remaining ROs in the third RO cannot be used for the next round of multi-PRACH transmission, the above steps can be used, or other steps can be used.

[0237] Based on the mapping of each PRACH transmission RO of the multi-PRACH transmission, the mapping of each PRACH transmission RO of the multi-PRACH transmission is based on the number of third ROs in the SSB and RO association period and the maximum allowed number of PRACH transmissions in the multi-PRACH transmission. There can be a group of multi-PRACH transmission opportunities, or there can be multiple groups of multi-PRACH transmission opportunities. The terminal device can select any group of multi-PRACH transmission opportunities when performing multi-PRACH transmission. The specific group is not limited by the embodiments of the present disclosure.

[0238] In some embodiments of the present disclosure, when the terminal device performs multi-PRACH transmission, the embodiments of the present disclosure provide a multi-PRACH transmission method, which can be implemented by the following methods, but is not limited to the following methods, as shown in Figure 6 The method includes the following method one and / or method two:

[0239] The first mode is: in response to the terminal device performing one multi-PRACH transmission in the association period of the SSB and the RO, starting the one multi-PRACH transmission at the Yth RO of a transmission opportunity of one multi-PRACH transmission in the association period of the SSB and the RO, where Y is the starting offset of the RO, and Y is the starting offset of the RO.

[0240] In the embodiments of the present disclosure, the specific implementation manner of selecting one transmission opportunity from the configured transmission opportunities of multi-PRACH transmission is not limited, and can be selected by the terminal according to the actual situation.

[0241] When one transmission opportunity is selected for one multi-PRACH transmission, the one multi-PRACH transmission can start at the Yth RO of the transmission opportunity of the target multi-PRACH transmission, where Y is the starting offset of each PRACH transmission in the multi-PRACH transmission performed in the M ROs of the transmission opportunity of the one multi-PRACH transmission, and the value of Y can be agreed by the system or set by the network device and delivered to the terminal device. The embodiments of the present disclosure do not limit this. When the value of Y is agreed by the system, the terminal device obtains the value of Y based on the system agreement and performs subsequent multi-PRACH transmission; when the value of Y is set by the network device and delivered to the terminal device, the terminal device receives the value of Y delivered by the terminal and performs multi-PRACH transmission based on the value of Y. The value of Y of the one multi-PRACH transmission performed by the terminal device can be, for example, 0, 1, 2, 3, …, and the number with a value of 0 is numbered starting from 0.

[0242] In the embodiments of the present disclosure, taking a continuous interval as an example, if the terminal device expects to use the A th multi-PRACH transmission opportunity, the first PRACH transmission of the one multi-PRACH transmission of the terminal device is sent on the Yth RO of the A th multi-PRACH transmission opportunity, the second PRACH transmission is sent on the Y+1 th RO of the A th multi-PRACH transmission opportunity, and the M th PRACH transmission is sent on the Y+M-1 th RO of the A th multi-PRACH transmission opportunity.

[0243] The second mode is: in response to the terminal device performing one multi-PRACH transmission in the association period of the SSB and the RO, starting the one multi-PRACH transmission at any RO of a transmission opportunity of one multi-PRACH transmission in the association period of the SSB and the RO.

[0244] In the embodiments of the present disclosure, the specific implementation manner of selecting one transmission opportunity from the configured transmission opportunities of multi-PRACH transmission is not limited, and can be selected by the terminal according to the actual situation.

[0245] When a transmission opportunity is selected for a multi-PRACH transmission, the continuous or equally spaced P ROs starting from any RO of the transmission opportunity of the target multi-PRACH transmission can be performed, as long as there are P continuous or equally spaced ROs starting from the RO on the target multi-PRACH transmission opportunity. P is the number of PRACH transmissions required for a multi-PRACH transmission of the terminal. P can be the number of transmissions of a multi-PRACH transmission defined by the network or the minimum number of transmissions.

[0246] The above description is for the terminal device side based on a multi-PRACH transmission in the third RO within the SSB and RO association period. The following provides a multi-PRACH transmission method based on a multi-PRACH transmission in the third RO within the SSB and RO association period, network device side, as shown in Figure 6 The method comprises:

[0247] Step 603, in response to the third RO within the SSB and RO association period, mapping M continuous or equally spaced ROs starting from the Xth RO in the third RO to M ROs in the first transmission opportunity of the multi-PRACH transmission, X is the starting offset of the RO, and M is the maximum allowed PRACH transmission number of a multi-PRACH transmission.

[0248] As described above, the determination of the order of each PRACH transmission of the network device based on the third RO within the SSB and RO association period needs to be consistent with the order of each PRACH transmission of the terminal device in the multi-PRACH transmission, so the same configuration rule is used for mapping the RO of each PRACH transmission in the multi-PRACH transmission. The configuration rule can be set by the network device and delivered to the terminal device, or it can be agreed by the protocol. Specific embodiments of the present disclosure do not limit this.

[0249] Wherein, the network device responds to the third RO within the SSB and RO association period, maps M continuous or equally spaced ROs starting from the Xth RO in the third RO to M ROs in the first transmission opportunity of the multi-PRACH transmission, X is the starting offset of the time domain position, and M is the maximum allowed PRACH transmission number of a multi-PRACH transmission. The third RO maps M continuous or equally spaced ROs starting from the Xth RO to M ROs in the first transmission opportunity of the multi-PRACH transmission, X is the starting offset of the RO, and M is the maximum allowed PRACH transmission number of a multi-PRACH transmission. The related description can refer to the related description of the terminal device side, and the embodiments of the present disclosure will not be repeated here.

[0250] Step 604, the network device maps the second M consecutive or equally spaced ROs in the third RO to the M ROs in the second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the third RO to the M ROs in the other transmission opportunities of the multi-PRACH transmission.

[0251] It should be noted that the related description of mapping the M consecutive or equally spaced ROs in the third RO to the M ROs in the second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the third RO to the M ROs in the other transmission opportunities of the multi-PRACH transmission can refer to the related description on the terminal device side, and the embodiments of the present disclosure will not be repeated here.

[0252] In the embodiments of the present disclosure, according to the comparison between the number of PRACH transmissions in one multi-PRACH transmission and the number of third ROs in the SSB-RO association period, if the number of third ROs in the SSB-RO association period is less than the number of PRACH transmissions in one multi-PRACH transmission, the remaining ROs in the third ROs in the SSB-RO association period cannot be used by the terminal device for multi-PRACH transmission. If the number of third ROs in the SSB-RO association period is greater than or equal to the number of PRACH transmissions in one multi-PRACH transmission, the remaining ROs in the third ROs in the SSB-RO association period can be used by the terminal device for multi-PRACH transmission, and when transmitting, the determination of the order of PRACH transmission positions in one multi-PRACH transmission should be made according to the above rules.

[0253] Based on the above description, in some embodiments of the present disclosure, after completing the mapping of one third RO to the RO of the output opportunity of the multi-PRACH transmission, the method further comprises at least one of the following steps:

[0254] In response to the number of remaining ROs in the third RO not meeting the mapping of the next round of the third RO to the RO of the output opportunity of the multi-PRACH transmission, it is determined that the remaining ROs in the third RO cannot be used for the multi-PRACH transmission. Wherein, the number of remaining ROs in the third RO not meeting the mapping of the next round of the third RO to the RO of the output opportunity of the multi-PRACH transmission means that the remaining ROs in the third RO cannot meet the multi-PRACH transmission, so the remaining ROs in the third RO cannot be used for the multi-PRACH transmission;

[0255] and in response to the number of PRACH transmissions of the multiple PRACH transmissions being less than or equal to the number of remaining ROs in the third RO, determining that the remaining ROs in the third RO can be used for the multiple PRACH transmissions. Where the number of PRACH transmissions of the multiple PRACH transmissions is less than or equal to the number of remaining ROs in the third RO, it means that the number of remaining ROs in the third RO is greater than or equal to the number of PRACH transmissions of the multiple PRACH transmissions, which can meet the requirement of performing each PRACH transmission in the multiple PRACH transmissions, so the remaining ROs in the third RO can perform the multiple PRACH transmissions.

[0256] It should be noted that the above embodiments give the case where the number of remaining ROs in the third RO cannot be used for the next round of multiple PRACH transmissions, and the case where the number of remaining ROs in the third RO can be used for the next round of multiple PRACH transmissions. Those skilled in the art can understand that when implementing the scheme of the embodiments of the present disclosure, only any one of the steps can be implemented, or both of the above steps can be implemented. That is, when the number of remaining ROs in the third RO cannot be used for the next round of multiple PRACH transmissions, the above steps can be used; and when the number of remaining ROs in the third RO can be used for the next round of multiple PRACH transmissions, both the above steps and other steps can be used to achieve. Similarly, when the number of remaining ROs in the third RO can be used for the next round of multiple PRACH transmissions, the above steps can be used; and when the number of remaining ROs in the third RO cannot be used for the next round of multiple PRACH transmissions, both the above steps and other steps can be used to achieve.

[0257] It should be noted that in the association period of SSB and RO, after completing the mapping of a round of SSB to RO, if the number of remaining ROs is insufficient to complete a round of SSB to RO mapping, the remaining ROs are invalid ROs.

[0258] The embodiment of the present disclosure provides a multi-PRACH transmission method, when transmission is performed based on a third RO in a SSB and RO association period, in response to the third RO in the SSB and RO association period, M consecutive or equally spaced ROs starting from an Xth RO in the third RO are mapped to M ROs in a first transmission opportunity of the multi-PRACH transmission, and the second M consecutive or equally spaced ROs in the third RO are mapped to M ROs in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the third RO to M ROs in other transmission opportunities of the multi-PRACH transmission. The terminal performs multi-PRACH transmission starting from a Yth RO in a transmission opportunity of the multi-PRACH transmission, or performs multi-PRACH transmission starting from any RO in a transmission opportunity of the multi-PRACH transmission, so as to guarantee the normal and orderly transmission of multiple Msg1 in the multi-PRACH transmission.

[0259] Corresponding to the multi-PRACH transmission method provided by the above several embodiments, the present disclosure also provides a multi-PRACH transmission device. Since the multi-PRACH transmission device provided by the embodiment of the present disclosure corresponds to the multi-PRACH transmission method provided by the above several embodiments, the implementation of the multi-PRACH transmission method is also applicable to the multi-PRACH transmission device provided by the present embodiment, which will not be described in detail in the present embodiment.

[0260] Figure 7 A structural schematic diagram of a multi-PRACH transmission device 700 provided according to an embodiment of the present disclosure is shown in the figure. The multi-PRACH transmission device 700 can be used in a terminal device.

[0261] As shown in the figure, the multi-PRACH transmission device 700 can include a determination unit 701. Figure 7

[0262] The determination unit 701 is configured to determine the position order of each PRACH transmission in one multi-PRACH transmission according to the position order of the random access channel (RACH) occasion (RO) in response to performing multi-PRACH transmission.

[0263] In some embodiments of the present disclosure, the determination unit 701 is configured to map M consecutive or equally spaced ROs starting from an Xth RO in a first RO associated with one SSB to M ROs in a first transmission opportunity of the multi-PRACH transmission in response to the first RO associated with the one SSB, wherein the X is a starting offset of the RO, and the M is a maximum allowed PRACH transmission number of one multi-PRACH transmission.

[0264] ​mapping the second M consecutive or equally spaced ROs in the first RO to M ROs in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the first RO to M ROs in other transmission opportunities of the multi-PRACH transmission.

[0265] In some embodiments of the present disclosure, the multi-PRACH transmission apparatus as shown in Figure 8 further comprises a transmission unit 702.

[0266] The transmission unit 702 is configured to, in response to the terminal device selecting a target SSB for a multi-PRACH transmission, start the multi-PRACH transmission at a Yth RO of a transmission opportunity of a multi-PRACH transmission corresponding to the target SSB, where Y is a starting offset of the RO.

[0267] In some embodiments of the present disclosure, the transmission unit 702 is further configured to, in response to the terminal device selecting a target SSB for a multi-PRACH transmission, start the multi-PRACH transmission at any RO of a transmission opportunity of a multi-PRACH transmission corresponding to the target SSB.

[0268] In some embodiments of the present disclosure, the number of PRACH transmissions in the multi-PRACH transmission is less than or equal to M.

[0269] In some embodiments of the present disclosure, the multi-PRACH transmission apparatus as shown in Figure 9 further comprises a judgment unit 703.

[0270] The judgment unit 703 is configured to, after completing the mapping of a first RO to ROs of a transmission opportunity of the multi-PRACH transmission, perform at least one of the following steps:

[0271] In response to the number of remaining ROs in the first RO not satisfying the mapping of the first RO to ROs of a next round of the multi-PRACH transmission, determining that the remaining ROs in the first RO cannot be used for the multi-PRACH transmission.

[0272] or in response to the number of PRACH transmissions of a multi-PRACH transmission being less than or equal to the number of remaining ROs in the first RO, determining that the remaining ROs in the first RO can be used for the multi-PRACH transmission.

[0273] In some embodiments of the present disclosure, the determining unit 701 is configured to, in response to all time domain positions of a first RO associated with one SSB, map M consecutive or equally-spaced time domain positions starting from a zth time domain position among all time domain positions in the first RO to M time domain positions in a first transmission opportunity of the multi-PRACH transmission, where z is a starting offset of the time domain position, and M is a maximum allowed PRACH transmission number of one multi-PRACH transmission.

[0274] map the second M consecutive or equally-spaced time domain positions among all time domain positions of the first RO to M time domain positions in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the M consecutive or equally-spaced time domain positions in other time domain positions of the first RO to M time domain positions in other transmission opportunities of the multi-PRACH transmission.

[0275] In some embodiments of the present disclosure, the transmission unit 702 is further configured to, in response to the terminal device selecting one target SSB for one multi-PRACH transmission, start the one multi-PRACH transmission at a Yth time domain position of a transmission opportunity of the one multi-PRACH transmission corresponding to the target SSB.

[0276] In some embodiments of the present disclosure, the transmission unit 702 is further configured to, in response to the terminal device selecting one target SSB for one multi-PRACH transmission, start the one multi-PRACH transmission at an arbitrary time domain position of a transmission opportunity of the one multi-PRACH transmission corresponding to the target SSB.

[0277] In some embodiments of the present disclosure, the transmission unit 702 is further configured to, in response to the terminal device performing the one multi-PRACH transmission at a time domain position in one multi-PRACH transmission opportunity, use N consecutive or equally-spaced ROs starting from a pth RO at a time domain position in one multi-PRACH transmission opportunity to send N PRACHs in the one multi-PRACH transmission, where p is a starting offset of the RO.

[0278] In some embodiments of the present disclosure, the determining unit 703 is further configured to, after completing the mapping of the time domain positions of one first RO to the time domain positions of the output opportunity of the multi-PRACH transmission, perform at least one of the following steps:

[0279] In response to the number of remaining time domain positions in the first RO not satisfying the mapping of the time domain positions of the first RO to the time domain positions of one output opportunity of the multi-PRACH transmission in the next round, determine that the remaining time domain positions in the first RO cannot be used for the multi-PRACH transmission;

[0280] or in response to the number of PRACH transmissions of one multi-PRACH transmission being less than or equal to the number of time domain positions remaining in the first RO, determining that the time domain positions remaining in the first RO can be used for the multi-PRACH transmission.

[0281] In some embodiments of the present disclosure, the determining unit 701 is configured to, in response to a second RO associated with one time domain position, map M consecutive or equally spaced ROs starting from an Xth RO in the second RO to M ROs in a first transmission opportunity of the multi-PRACH transmission, wherein X is a starting offset of the ROs, and M is a maximum allowed number of PRACH transmissions of one multi-PRACH transmission.

[0282] map the second M consecutive or equally spaced ROs in the second RO to M ROs in a second transmission opportunity of the multi-PRACH transmission, and map the other M consecutive or equally spaced ROs in the second RO to M ROs in other transmission opportunities of the multi-PRACH transmission in a similar manner.

[0283] In some embodiments of the present disclosure, the transmission unit 702 is further configured to, in response to the terminal device selecting one target time domain position for one multi-PRACH transmission, start the one multi-PRACH transmission at a Yth RO of a transmission opportunity of the multi-PRACH transmission corresponding to the target time domain position, wherein Y is a starting offset of the ROs.

[0284] In some embodiments of the present disclosure, the transmission unit 702 is further configured to, in response to the terminal device selecting one target time domain position B for one multi-PRACH transmission, start the one multi-PRACH transmission at any RO of a transmission opportunity of the multi-PRACH transmission corresponding to the target time domain position.

[0285] In some embodiments of the present disclosure, the number of PRACH transmissions of the one multi-PRACH transmission is less than or equal to M.

[0286] In some embodiments of the present disclosure, the determining unit 703 is further configured to, after completing the mapping of one second RO to ROs of an output opportunity of the multi-PRACH transmission, the method further comprises at least one of the following steps:

[0287] In response to the number of ROs remaining in the second RO not satisfying the mapping of the next round of the second RO to ROs of an output opportunity of the multi-PRACH transmission, determining that the ROs remaining in the second RO cannot be used for the multi-PRACH transmission.

[0288] or in response to the number of PRACH transmissions of one multi-PRACH transmission being less than or equal to the number of remaining ROs in the second RO, determining that the remaining ROs in the second RO can be used for the multi-PRACH transmission.

[0289] In some embodiments of the present disclosure, the determining unit 701 is configured to, in response to a third RO in an SSB-RO association period, map M consecutive or equally spaced ROs starting from an Xth RO in the third RO to M ROs in a first transmission opportunity of the multi-PRACH transmission, wherein the X is a starting offset of ROs, and the M is a maximum allowed number of PRACH transmissions of one multi-PRACH transmission.

[0290] map the second M consecutive or equally spaced ROs in the third RO to M ROs in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the third RO to M ROs in other transmission opportunities of the multi-PRACH transmission.

[0291] In some embodiments of the present disclosure, the transmission unit 702 is further configured to, in response to the terminal performing one multi-PRACH transmission in an SSB-RO association period, start the one multi-PRACH transmission at a Yth RO of a transmission opportunity of one multi-PRACH transmission in the SSB-RO association period, wherein the Y is a starting offset of ROs.

[0292] In some embodiments of the present disclosure, the transmission unit 702 is further configured to, in response to the terminal device performing one multi-PRACH transmission in an SSB-RO association period, start the one multi-PRACH transmission at any RO of a transmission opportunity of one multi-PRACH transmission in the SSB-RO association period.

[0293] In some embodiments of the present disclosure, the number of PRACH transmissions in the one multi-PRACH transmission is less than or equal to M.

[0294] In some embodiments of the present disclosure, the determining unit 703 is further configured to, after completing the mapping of one third RO to ROs of an output opportunity of the multi-PRACH transmission, the method further comprises at least one of the following steps:

[0295] In response to the number of remaining ROs in the third RO not satisfying the mapping of one third RO to ROs of an output opportunity of the multi-PRACH transmission, determining that the remaining ROs in the third RO cannot be used for the multi-PRACH transmission.

[0296] or in response to the number of PRACH transmissions of one multi-PRACH transmission being less than or equal to the number of remaining ROs in the third RO, determining that the remaining ROs in the third RO can be used for the multi-PRACH transmission.

[0297] Some embodiments of the present disclosure also provide a multi-PRACH transmission device, such as Figure 10 As shown, the device is applied to a network device, and the device comprises a determination unit 801.

[0298] The determination unit 801 is configured to, in response to performing multi-PRACH transmission, determine the position order of each PRACH transmission in one multi-PRACH transmission according to the position order of random access channel (RACH) occasions (ROs).

[0299] In some embodiments of the present disclosure, the determination unit 801 is configured to, in response to a first RO associated with one SSB, map M consecutive or equally spaced ROs starting from an Xth RO in the first RO to M ROs in a first transmission opportunity of the multi-PRACH transmission, wherein X is a starting offset of ROs, and M is the maximum allowed number of PRACH transmissions of one multi-PRACH transmission.

[0300] Map the second M consecutive or equally spaced ROs in the first RO to M ROs in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the first RO to M ROs in other transmission opportunities of the multi-PRACH transmission.

[0301] In some embodiments of the present disclosure, the multi-PRACH transmission device, as shown in Figure 11 Further comprises a judgment unit 802 configured to, after completing the mapping of one first RO to ROs of the output opportunity of the multi-PRACH transmission, perform at least one of the following steps:

[0302] In response to the number of remaining ROs in the first RO not meeting the mapping of the next round of the first RO to ROs of one output opportunity of the multi-PRACH transmission, determining that the remaining ROs in the first RO cannot be used for the multi-PRACH transmission;

[0303] Or in response to the number of PRACH transmissions of one multi-PRACH transmission being less than or equal to the number of remaining ROs in the first RO, determining that the remaining ROs in the first RO can be used for the multi-PRACH transmission.

[0304] In some embodiments of the present disclosure, the determining unit 801 is configured to, in response to all time domain positions of a first RO associated with one SSB, map M consecutive or equally spaced time domain positions starting from a zth time domain position in all time domain positions in the first RO to M time domain positions in a first transmission opportunity of the multi-PRACH transmission, where z is a starting offset of the time domain position, and M is a maximum allowed PRACH transmission number of one multi-PRACH transmission.

[0305] map the second M consecutive or equally spaced time domain positions in all time domain positions of the first RO to M time domain positions in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the M consecutive or equally spaced time domain positions in other time domain positions in the first RO to M time domain positions in other transmission opportunities of the multi-PRACH transmission.

[0306] In some embodiments of the present disclosure, the determining unit 801 is configured to, in response to all time domain positions of a first RO associated with one SSB, map M consecutive or equally spaced time domain positions starting from a zth time domain position in all time domain positions in the first RO to M time domain positions in a first transmission opportunity of the multi-PRACH transmission, where z is a starting offset of the time domain position, and M is a maximum allowed PRACH transmission number of one multi-PRACH transmission.

[0307] In response to the number of remaining time domain positions in the first RO not satisfying the mapping of the time domain positions in the first RO to the time domain positions in the output opportunity of the multi-PRACH transmission in the next round, determine that the remaining time domain positions in the first RO cannot be used for the multi-PRACH transmission.

[0308] Or in response to the PRACH transmission number of one multi-PRACH transmission being less than or equal to the number of remaining time domain positions in the first RO, determine that the remaining time domain positions in the first RO can be used for the multi-PRACH transmission.

[0309] In some embodiments of the present disclosure, the determining unit 801 is configured to, in response to a second RO associated with one time domain position, map M consecutive or equally spaced ROs starting from an Xth RO in the second RO to M ROs in a first transmission opportunity of the multi-PRACH transmission, where X is a starting offset of the RO, and M is a maximum allowed PRACH transmission number of one multi-PRACH transmission.

[0310] map the second M consecutive or equally spaced ROs in the second RO to M ROs in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of other M consecutive or equally spaced ROs in the second RO to M ROs in other transmission opportunities of the multi-PRACH transmission.

[0311] In some embodiments of the present disclosure, the determining unit 801 is configured to, in response to a second RO associated with one time domain position, map M consecutive or equally spaced ROs starting from an Xth RO in the second RO to M ROs in a first transmission opportunity of the multi-PRACH transmission, where X is a starting offset of the RO, and M is a maximum allowed PRACH transmission number of one multi-PRACH transmission.

[0312] determining that the remaining ROs in the second ROs cannot be used for the multi-PRACH transmission in response to that the number of the remaining ROs in the second ROs does not satisfy the mapping of the ROs in the next round of the second ROs to the output opportunities of the ROs in the multi-PRACH transmission;

[0313] or determining that the remaining ROs in the second ROs can be used for the multi-PRACH transmission in response to that the number of the PRACH transmissions in one multi-PRACH transmission is less than or equal to the number of the remaining ROs in the second ROs.

[0314] In some embodiments of the present disclosure, the determining unit 801 is configured to, in response to a third RO in a SSB and RO association period, map M consecutive or equally spaced ROs starting from an Xth RO in the third RO to M ROs in a first transmission opportunity of the multi-PRACH transmission, where X is a starting offset of the ROs, and M is a maximum allowed number of PRACH transmissions in one multi-PRACH transmission.

[0315] map the second M consecutive or equally spaced ROs in the third RO to M ROs in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the third RO to M ROs in other transmission opportunities of the multi-PRACH transmission.

[0316] In some embodiments of the present disclosure, the determining unit 801 is configured to, in response to a third RO in a SSB and RO association period, map M consecutive or equally spaced ROs starting from an Xth RO in the third RO to M ROs in a first transmission opportunity of the multi-PRACH transmission, where X is a starting offset of the ROs, and M is a maximum allowed number of PRACH transmissions in one multi-PRACH transmission.

[0317] determining that the remaining ROs in the third ROs cannot be used for the multi-PRACH transmission in response to that the number of the remaining ROs in the third ROs does not satisfy the mapping of the ROs in the next round of the third ROs to the output opportunities of the ROs in the multi-PRACH transmission;

[0318] or determining that the remaining ROs in the third ROs can be used for the multi-PRACH transmission in response to that the number of the PRACH transmissions in one multi-PRACH transmission is less than or equal to the number of the remaining ROs in the third ROs.

[0319] The embodiments of the present disclosure provide a multi-PRACH transmission device, which determines the position order of each PRACH transmission in one multi-PRACH transmission according to the position order of a random access channel (RACH) occasion (RO), and provides a solution to how to configure the RO in the multi-PRACH transmission, thereby guaranteeing the normal and orderly transmission of multiple Msg1s in the multi-PRACH transmission.

[0320] Please refer to FIG. 1, Figure 12FIG. 11 is a structural diagram of a communication apparatus 1100 provided by an embodiment of the present application. The communication apparatus 1100 can be a network device, a user equipment, a chip, a chip system, or a processor supporting the network device to implement the method, or a chip, a chip system, or a processor supporting the user equipment to implement the method. The apparatus can be used to implement the method described in the above method embodiments, which can be referred to the description in the above method embodiments.

[0321] The communication apparatus 1100 can include one or more processors 1101. The processor 1101 can be a general purpose processor or a special purpose processor. For example, the processor 1101 can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication apparatus (e.g., a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a computer program, and process data of the computer program.

[0322] Optionally, the communication apparatus 1100 can further include one or more memories 1102, which can store a computer program 1104. The processor 1101 executes the computer program 1104 to enable the communication apparatus 1100 to perform the method described in the above method embodiments. Optionally, the memory 1102 can also store data. The communication apparatus 1100 and the memory 1102 can be separately arranged or integrated together.

[0323] Optionally, the communication apparatus 1100 can further include a transceiver 1105 and an antenna 1106. The transceiver 1105 can be referred to as a transceiving unit, a transceiver, or a transceiving circuit, etc., and is used to implement the transceiving function. The transceiver 1105 can include a receiver and a transmitter. The receiver can be referred to as a receiver or a receiving circuit, etc., and is used to implement the receiving function. The transmitter can be referred to as a transmitter or a transmitting circuit, etc., and is used to implement the transmitting function.

[0324] Optionally, the communication apparatus 1100 can further include one or more interface circuits 1107. The interface circuit 1107 is used to receive code instructions and transmit them to the processor 1101. The processor 1101 runs the code instructions to enable the communication apparatus 1100 to perform the method described in the above method embodiments.

[0325] In an implementation manner, the processor 1101 can include a transceiver for implementing the receiving and transmitting functions. For example, the transceiver can be a transceiving circuit, or an interface, or an interface circuit. The transceiving circuit, the interface, or the interface circuit for implementing the receiving and transmitting functions can be separate or integrated together. The transceiving circuit, the interface, or the interface circuit described above can be used for reading and writing of codes / data, or the transceiving circuit, the interface, or the interface circuit described above can be used for transmission or transfer of signals.

[0326] In an implementation, the processor 1101 can store a computer program 1103, which, when run on the processor 1101, can cause the communication device 1100 to perform the methods described in the above method embodiments. The computer program 1103 can be fixed in the processor 1101, in which case the processor 1101 can be implemented by hardware.

[0327] In an implementation, the communication device 1100 can include a circuit, which can implement the functions of sending or receiving or communicating in the above method embodiments. The processor and the transceiver described in the present application can be implemented on an integrated circuit (IC), an analog IC, a radio frequency integrated circuit (RFIC), a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and the transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), n metal-oxide-semiconductor (NMOS), positive channel metal oxide semiconductor (PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0328] The communication device described in the above embodiments can be a network device or a user equipment, but the scope of the communication device described in the present application is not limited thereto, and the structure of the communication device can not be limited by Figure 12 The communication device can be a standalone device or can be part of a larger device. For example, the communication device can be:

[0329] (1) a standalone integrated circuit (IC), or a chip, or a chip system or subsystem;

[0330] (2) a set of one or more ICs, which can optionally also include a storage component for storing data, computer programs;

[0331] (3) an ASIC, such as a Modem;

[0332] (4) a module that can be embedded in other devices;

[0333] (5) receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handsets, mobile units, car kits, network devices, cloud devices, artificial intelligence devices, and the like;

[0334] (6) and the like.

[0335] For the case that the communication device can be a chip or a chip system, refer to the structural schematic diagram of the chip shown in FIG. 12. Figure 13 The chip shown in FIG. 12 includes a processor 1201 and an interface 1202. Wherein, the number of the processor 1201 can be one or more, and the number of the interface 1202 can be multiple. Figure 13

[0336] Optionally, the chip further includes a memory 1203, which is used to store necessary computer programs and data.

[0337] Those skilled in the art can also understand that the various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. Whether the function is implemented by hardware or software depends on the specific application and design requirements of the whole system. Those skilled in the art can use various methods to implement the function for each specific application, but such implementation should not be understood as beyond the scope of protection of the embodiments of the present application.

[0338] The present application also provides a readable storage medium having instructions stored thereon, which, when executed by a computer, implement the functions of any of the above method embodiments.

[0339] The present application also provides a computer program product, which, when executed by a computer, implements the functions of any of the above method embodiments.

[0340] ​In the embodiments described above, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs. When the computer programs are loaded on a computer and executed, all or part of the processes or functions according to the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer programs can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer programs can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center through wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. containing one or more available media sets. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, high-density digital video disc (digital video disc, DVD)), or semiconductor media (for example, solid state disk (solid state disk, SSD)) and the like.

[0341] Those of ordinary skill in the art can understand that various numbers such as first, second, etc. involved in the present application are only distinguished for the convenience of description, and do not limit the scope of the embodiments of the present application, nor represent the order of precedence.

[0342] At least one of the present application can also be described as one or more, and the plurality can be two, three, four or more, which is not limited in the present application. In the embodiments of the present application, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", and there is no order or size order between the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0343] As used herein, the terms "machine-readable medium" and "computer-readable medium" refer to any computer program product, apparatus and / or device (e.g., magnetic discs, optical discs, memory, programmable logic devices (PLDs)) used to provide machine instructions and / or data to a programmable processor, including a machine-readable medium that receives the machine instructions as a machine-readable signal. The term "machine-readable signal" refers to any signal used to provide machine instructions and / or data to a programmable processor.

[0344] The systems and techniques described here can be implemented in a computing system that includes a back end component, e.g., as a data server, or that includes a middleware component, e.g., an application server, or that includes a front end component, e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here, or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication, e.g., a communication network. Examples of communication networks include a local area network (LAN), a wide area network (WAN), and the Internet.

[0345] The computer system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other.

[0346] It should be understood that the various forms of flow shown in the above figures can be re-ordered, added to, or deleted from, without departing from the scope of the present disclosure. For example, the steps recited in the disclosure can be executed in parallel, executed in sequence, or executed in different orders, without departing from the desired results of the technology disclosed in the present disclosure, and are not limited herein.

[0347] In addition, it should be understood that various embodiments of the present application can be implemented alone or in combination with other embodiments as far as the scheme permits.

[0348] Those skilled in the art can appreciate that the units and algorithm steps of the examples described in connection with the embodiments disclosed herein can be realized in electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technology scheme. A skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0349] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0350] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for transmitting data via a multi-physical random access channel (PRACH), characterized in that, The method is applied to a terminal device, and the method comprises: In response to performing multiple PRACH transmissions, determining the order of positions of each PRACH transmission in a multiple PRACH transmission according to the order of positions of random access channel (RACH) occasions (ROs), comprising: In response to a first RO associated with one SSB, mapping M consecutive or equally spaced ROs starting from an Xth RO in the first RO to M ROs in a first transmission opportunity of the multiple PRACH transmission, wherein the X is a starting offset of ROs, and the M is a maximum allowed number of PRACH transmissions in a multiple PRACH transmission; mapping a second M consecutive or equally spaced ROs in the first RO to M ROs in a second transmission opportunity of the multiple PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the first RO to M ROs in other transmission opportunities of the multiple PRACH transmission; or In response to all time domain positions of a first RO associated with one SSB, mapping M consecutive or equally spaced time domain positions starting from a zth time domain position in all time domain positions of the first RO to M time domain positions in a first transmission opportunity of the multiple PRACH transmission, wherein the z is a starting offset of time domain positions, and the M is a maximum allowed number of PRACH transmissions in a multiple PRACH transmission; mapping a second M consecutive or equally spaced time domain positions in all time domain positions of the first RO to M time domain positions in a second transmission opportunity of the multiple PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced time domain positions in the first RO to M time domain positions in other transmission opportunities of the multiple PRACH transmission.

2. The method of claim 1, wherein, The method further comprises: In response to the terminal device selecting a target SSB for a multiple PRACH transmission, starting the multiple PRACH transmission at a Yth RO of a transmission opportunity of a multiple PRACH transmission corresponding to the target SSB, wherein the Y is a starting offset of ROs.

3. The method of claim 1, wherein, The method further comprises: In response to the terminal device selecting a target SSB for a multiple PRACH transmission, starting the multiple PRACH transmission at any RO of a transmission opportunity of a multiple PRACH transmission corresponding to the target SSB.

4. The method according to claim 2 or 3, characterized in that, The number of PRACH transmissions in the multiple PRACH transmission is less than or equal to M.

5. The method of claim 1, wherein, After completing the mapping of ROs from the first RO to the output opportunities of the multiple PRACH transmission, the method further comprises at least one of the following steps: In response to the number of ROs remaining in the first RO not satisfying the mapping of ROs from the first RO to the output opportunities of the multiple PRACH transmission in the next round, determining that the ROs remaining in the first RO cannot be used for the multiple PRACH transmission; and In response to the number of PRACH transmissions in a multiple PRACH transmission being less than or equal to the number of ROs remaining in the first RO, determining that the ROs remaining in the first RO can be used for the multiple PRACH transmission. The method further comprises:

6. The method of claim 1, wherein, ​ In response to the terminal device selecting a target SSB for a multi-PRACH transmission, starting the multi-PRACH transmission at a Yth time domain position of a transmission opportunity of the multi-PRACH transmission corresponding to the target SSB.

7. The method of claim 6, wherein, The method further comprises: In response to the terminal device selecting a target SSB for a multi-PRACH transmission, starting the multi-PRACH transmission at any time domain position of a transmission opportunity of the multi-PRACH transmission corresponding to the target SSB.

8. The method according to claim 6 or 7, characterized in that, The method further comprises: In response to the terminal device selecting a target time domain position for a multi-PRACH transmission, starting the multi-PRACH transmission at a Yth RO of a transmission opportunity of the multi-PRACH transmission corresponding to the target time domain position, the Y being a starting offset of ROs.

9. The method of claim 1, wherein, After completing the mapping of the time domain positions of a first RO to the time domain positions of an output opportunity of the multi-PRACH transmission, the method further comprises at least one of the following steps: In response to the number of remaining time domain positions in the first RO not satisfying the mapping of the time domain positions of the first RO to the time domain positions of the next round of the multi-PRACH transmission, determining that the remaining time domain positions in the first RO cannot be used for the multi-PRACH transmission; And In response to the number of PRACH transmissions of a multi-PRACH transmission being less than or equal to the number of remaining time domain positions in the first RO, determining that the remaining time domain positions in the first RO can be used for the multi-PRACH transmission.

10. The method of claim 1, wherein, The method further comprises: In response to a second RO associated with a time domain position, mapping M consecutive or equally spaced ROs starting from an Xth RO in the second RO to M ROs in a first transmission opportunity of the multi-PRACH transmission, the X being a starting offset of ROs, and the M being a maximum allowed number of PRACH transmissions of a multi-PRACH transmission; Mapping a second M consecutive or equally spaced ROs in the second RO to M ROs in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of other M consecutive or equally spaced ROs in the second RO to M ROs in other transmission opportunities of the multi-PRACH transmission.

11. The method of claim 10, wherein, The method further comprises: In response to the terminal device selecting a target time domain position for a multi-PRACH transmission, starting the multi-PRACH transmission at a Yth RO of a transmission opportunity of the multi-PRACH transmission corresponding to the target time domain position, the Y being a starting offset of ROs.

12. The method of claim 10, wherein, The method further comprises: In response to the terminal device selecting a target time domain position B for a multi-PRACH transmission, starting the multi-PRACH transmission at any RO of a transmission opportunity of the multi-PRACH transmission corresponding to the target time domain position.

13. The method according to claim 11 or 12, characterized in that, The number of PRACH transmissions in the one multi-PRACH transmission is less than or equal to M.

14. The method of claim 10, wherein, After completing the mapping of one second RO to the RO of the output opportunity of the multi-PRACH transmission, the method further comprises at least one of the following steps: In response to the number of remaining ROs in the second RO not meeting the mapping of the next round of the second RO to the RO of the output opportunity of the multi-PRACH transmission, it is determined that the remaining ROs in the second RO cannot be used for the multi-PRACH transmission; And In response to the number of PRACH transmissions in the one multi-PRACH transmission being less than or equal to the number of remaining ROs in the second RO, it is determined that the remaining ROs in the second RO can be used for the multi-PRACH transmission.

15. The method of claim 1, wherein, The method further comprises: In response to the third RO in the SSB and RO association period, the M consecutive or equally spaced ROs starting from the Xth RO in the third RO are mapped to the M ROs in the first transmission opportunity of the multi-PRACH transmission, and the X is the starting offset of the RO, and the M is the maximum allowed number of PRACH transmissions in the one multi-PRACH transmission; The second M consecutive or equally spaced ROs in the third RO are mapped to the M ROs in the second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the third RO to the M ROs in the other transmission opportunities of the multi-PRACH transmission.

16. The method of claim 15, wherein, The method further comprises: In response to the terminal performing one multi-PRACH transmission in the SSB and RO association period, the one multi-PRACH transmission is started at the Yth RO of the transmission opportunity of the one multi-PRACH transmission in the SSB and RO association period, and the Y is the starting offset of the RO.

17. The method of claim 15, wherein, The method further comprises: In response to the terminal device performing one multi-PRACH transmission in the SSB and RO association period, the one multi-PRACH transmission is started at any RO of the transmission opportunity of the one multi-PRACH transmission in the SSB and RO association period.

18. The method of claim 16 or 17, wherein, The number of PRACH transmissions in the one multi-PRACH transmission is less than or equal to M.

19. The method of claim 15, wherein, After completing the mapping of one third RO to the RO of the output opportunity of the multi-PRACH transmission, the method further comprises at least one of the following steps: In response to the number of remaining ROs in the third RO not meeting the mapping of the next round of the third RO to the RO of the output opportunity of the multi-PRACH transmission, it is determined that the remaining ROs in the third RO cannot be used for the multi-PRACH transmission; And In response to the number of PRACH transmissions in the one multi-PRACH transmission being less than or equal to the number of remaining ROs in the third RO, it is determined that the remaining ROs in the third RO can be used for the multi-PRACH transmission. 20.A method for multi-physical random access channel (PRACH) transmission, the method comprising: The method is applied to a network device, and the method comprises: In response to performing the multiple PRACH transmissions, determining a position order of each PRACH transmission in a multiple PRACH transmission according to a position order of random access channel, RACH, occasions, ROs, comprises: In response to a first RO associated with one SSB, mapping M consecutive or equally spaced ROs starting from an Xth RO in the first RO to M ROs in a first transmission opportunity of the multiple PRACH transmission, where X is a starting offset of ROs, and M is a maximum allowed number of PRACH transmissions in a multiple PRACH transmission; mapping a second M consecutive or equally spaced ROs in the first RO to M ROs in a second transmission opportunity of the multiple PRACH transmission, and so on, to complete the mapping of other M consecutive or equally spaced ROs in the first RO to M ROs in other transmission opportunities of the multiple PRACH transmission; or In response to all time domain positions of a first RO associated with one SSB, mapping M consecutive or equally spaced time domain positions starting from a zth time domain position in all time domain positions of the first RO to M time domain positions in a first transmission opportunity of the multiple PRACH transmission, where z is a starting offset of time domain positions, and M is a maximum allowed number of PRACH transmissions in a multiple PRACH transmission; mapping a second M consecutive or equally spaced time domain positions in all time domain positions of the first RO to M time domain positions in a second transmission opportunity of the multiple PRACH transmission, and so on, to complete the mapping of other M consecutive or equally spaced time domain positions in other time domain positions of the first RO to M time domain positions in other transmission opportunities of the multiple PRACH transmission.

21. The method of claim 20, wherein, After completing the mapping of ROs of a first RO to ROs of an output opportunity of the multiple PRACH transmission, the method further comprises at least one of the following steps: In response to a number of ROs remaining in the first RO not satisfying a condition for performing a next round of mapping of ROs of the first RO to ROs of an output opportunity of the multiple PRACH transmission, determining that the ROs remaining in the first RO cannot be used for the multiple PRACH transmission; and In response to a number of PRACH transmissions in a multiple PRACH transmission being less than or equal to a number of ROs remaining in the first RO, determining that the ROs remaining in the first RO can be used for the multiple PRACH transmission.

22. The method of claim 20, wherein, After completing the mapping of time domain positions of a first RO to time domain positions of an output opportunity of the multiple PRACH transmission, the method further comprises at least one of the following steps: In response to a number of time domain positions remaining in the first RO not satisfying a condition for performing a next round of mapping of time domain positions of the first RO to time domain positions of an output opportunity of the multiple PRACH transmission, determining that the time domain positions remaining in the first RO cannot be used for the multiple PRACH transmission; and In response to a number of PRACH transmissions in a multiple PRACH transmission being less than or equal to a number of time domain positions remaining in the first RO, determining that the time domain positions remaining in the first RO can be used for the multiple PRACH transmission.

23. The method of claim 20, wherein, The method for determining the position order of each PRACH transmission in a multiple PRACH transmission according to the position order of random access channel RACH occasions RO includes: In response to a second RO associated with a time domain position, mapping M consecutive or equally spaced ROs starting from an Xth RO in the second RO to M ROs in a first transmission opportunity of the multiple PRACH transmission, where X is a starting offset of ROs and M is a maximum allowed number of PRACH transmissions in a multiple PRACH transmission; Mapping the second M consecutive or equally spaced ROs in the second RO to M ROs in a second transmission opportunity of the multiple PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the second RO to M ROs in other transmission opportunities of the multiple PRACH transmission.

24. The method of claim 23, wherein, After completing the mapping of ROs from a second RO to output opportunities of the multiple PRACH transmission, the method further includes at least one of the following steps: In response to the number of remaining ROs in the second RO not meeting the requirement for the next round of mapping of ROs from the second RO to output opportunities of the multiple PRACH transmission, determining that the remaining ROs in the second RO cannot be used for the multiple PRACH transmission; and In response to the number of PRACH transmissions in a multiple PRACH transmission being less than or equal to the number of remaining ROs in the second RO, determining that the remaining ROs in the second RO can be used for the multiple PRACH transmission.

25. The method of claim 20, wherein, The method for determining the position order of each PRACH transmission in a multiple PRACH transmission according to the position order of random access channel RACH occasions RO includes: In response to a third RO within an SSB and RO association period, mapping M consecutive or equally spaced ROs starting from an Xth RO in the third RO to M ROs in a first transmission opportunity of the multiple PRACH transmission, where X is a starting offset of ROs and M is a maximum allowed number of PRACH transmissions in a multiple PRACH transmission; Mapping the second M consecutive or equally spaced ROs in the third RO to M ROs in a second transmission opportunity of the multiple PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the third RO to M ROs in other transmission opportunities of the multiple PRACH transmission.

26. The method of claim 23, wherein, After completing the mapping of ROs from a third RO to output opportunities of the multiple PRACH transmission, the method further includes at least one of the following steps: In response to the number of remaining ROs in the third RO not meeting the requirement for the next round of mapping of ROs from the third RO to output opportunities of the multiple PRACH transmission, determining that the remaining ROs in the third RO cannot be used for the multiple PRACH transmission; and In response to the number of PRACH transmissions in a multiple PRACH transmission being less than or equal to the number of remaining ROs in the third RO, determining that the remaining ROs in the third RO can be used for the multiple PRACH transmission.

27. A multi-physical random access channel (PRACH) transmission apparatus, characterized in that, The device is applied to a terminal device, and the device includes: The determining unit is configured to determine the order of the PRACH transmissions in a multi-PRACH transmission according to the order of the random access channel (RACH) occasions (ROs) in response to performing the multi-PRACH transmission, including: in response to a first RO associated with one SSB, mapping M consecutive or equally spaced ROs starting from an Xth RO in the first RO to M ROs in a first transmission opportunity of the multi-PRACH transmission, wherein the X is a starting offset of the ROs, and the M is a maximum allowed number of PRACH transmissions in a multi-PRACH transmission; mapping a second M consecutive or equally spaced ROs in the first RO to M ROs in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the first RO to M ROs in other transmission opportunities of the multi-PRACH transmission; or in response to all time domain positions of a first RO associated with one SSB, mapping M consecutive or equally spaced time domain positions starting from a zth time domain position in all time domain positions of the first RO to M time domain positions in a first transmission opportunity of the multi-PRACH transmission, wherein the z is a starting offset of the time domain positions, and the M is a maximum allowed number of PRACH transmissions in a multi-PRACH transmission; mapping a second M consecutive or equally spaced time domain positions in all time domain positions of the first RO to M time domain positions in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced time domain positions in the first RO to M time domain positions in other transmission opportunities of the multi-PRACH transmission.

28. A multi-physical random access channel (PRACH) transmission apparatus, characterized in that, The device is applied to a network device, and the device comprises: The determining unit is configured to determine the order of the PRACH transmissions in a multi-PRACH transmission according to the order of the random access channel (RACH) occasions (ROs) in response to performing the multi-PRACH transmission, including: in response to a first RO associated with one SSB, mapping M consecutive or equally spaced ROs starting from an Xth RO in the first RO to M ROs in a first transmission opportunity of the multi-PRACH transmission, wherein the X is a starting offset of the ROs, and the M is a maximum allowed number of PRACH transmissions in a multi-PRACH transmission; mapping a second M consecutive or equally spaced ROs in the first RO to M ROs in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced ROs in the first RO to M ROs in other transmission opportunities of the multi-PRACH transmission; or in response to all time domain positions of a first RO associated with one SSB, mapping M consecutive or equally spaced time domain positions starting from a zth time domain position in all time domain positions of the first RO to M time domain positions in a first transmission opportunity of the multi-PRACH transmission, wherein the z is a starting offset of the time domain positions, and the M is a maximum allowed number of PRACH transmissions in a multi-PRACH transmission; mapping a second M consecutive or equally spaced time domain positions in all time domain positions of the first RO to M time domain positions in a second transmission opportunity of the multi-PRACH transmission, and so on, to complete the mapping of the other M consecutive or equally spaced time domain positions in the first RO to M time domain positions in other transmission opportunities of the multi-PRACH transmission. In response to all time domain positions of a first RO associated with one SSB, map M consecutive or equally spaced time domain positions starting from a zth time domain position among all time domain positions in the first RO to M time domain positions in a first transmission opportunity of the multiple PRACH transmissions, the z being a starting offset of the time domain positions, and the M being a maximum allowed PRACH transmission number of one multiple PRACH transmission; map a second M consecutive or equally spaced time domain positions among all time domain positions of the first RO to M time domain positions in a second transmission opportunity of the multiple PRACH transmissions, and so on, to complete mapping of M consecutive or equally spaced time domain positions in other time domain positions of the first RO to M time domain positions in other transmission opportunities of the multiple PRACH transmissions.

29. A communications device, comprising: Comprise: a transceiver; a memory; a processor connected with the transceiver and the memory respectively, configured to control wireless signal transceiving of the transceiver by executing computer executable instructions on the memory, and capable of implementing the method in any one of claims 1-19 or the method in any one of claims 20-26.

30. A computer storage medium, wherein, The computer storage medium stores computer executable instructions; the computer executable instructions are executed by the processor, and capable of implementing the method in any one of claims 1-19 or the method in any one of claims 20-26.

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