Transmission opportunity indication method for PRACH (Physical Random Access Channel) repeated transmission, related equipment and communication system

Abstract

The invention provides a transmission opportunity indication method for PRACH (Physical Random Access Channel) repeated transmission, related equipment and a communication system, and relates to the field of wireless communication. The network equipment performs network side configuration, and the user equipment acquires the network side configuration; both the network equipment and the user equipment can divide a plurality of PRACH transmission opportunities in one or more associated pattern periods of a synchronization signal block SSB and PRACH transmission opportunities into one or more PRACH transmission opportunities according to the network side configuration; the user equipment performs PRACH repeated transmission in the unit during PRACH transmission; and the network equipment performs joint detection on PRACH repeated transmission in the unit during PRACH transmission. The understanding of the user side and the understanding of the network side on the resource position actually performing the PRACH repeated transmission are kept consistent, so that the network side can perform joint detection on the PRACH repeated transmission of the same user terminal, and the performance of the PRACH repeated transmission is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communications, and in particular to a transmission timing indication method for PRACH repeated transmission, and related user equipment, network equipment, and communication system. Background Art

[0002] The user equipment (UE) sends a preamble once at a PRACH (Physical Random Access Channel) transmission opportunity indicated by the base station. The UE can calculate the corresponding RA-RNTI (Random Access Radio Network Temporary Identifier) ​​value based on the time-frequency position of the PRACH transmission opportunity. Then, the UE monitors the PDCCH (Physical Downlink Control Channel) in the random access response (RAR) time window. If the UE successfully descrambles and detects the DCI (Downlink Control Information) 1_0 with the RA-RNTI, and can identify the RAPID (Random Access Preamble identifier) ​​in the random access response information scheduled by the DCI, the UE considers that its PRACH transmission is successful. Otherwise, the UE considers that the PRACH transmission is unsuccessful and needs to retransmit a new PRACH, which will bring additional delay.

[0003] After the introduction of PRACH repetition (or multiple transmissions), the network side and the user side need to align the resource locations for the actual PRACH repetition transmission. Otherwise, the network side cannot perform joint detection on the PRACH repetition transmission of the same user equipment, which will greatly reduce the performance of PRACH repetition transmission. Summary of the invention

[0004] A technical problem to be solved by the embodiments of the present disclosure is that the network side and the user side need to align the resource positions for actually performing PRACH repeated transmission.

[0005] In the disclosed embodiment, according to the network side configuration, both the network device and the user device can determine the PRACH transmission timing group for PRACH repeated transmission, so that the user side and the network side have consistent understanding of the resource location for actual PRACH repeated transmission, so that the network side can jointly detect the PRACH repeated transmission of the same user terminal, thereby improving the performance of PRACH repeated transmission.

[0006] The embodiment of the present disclosure provides a transmission timing indication method for repeated transmission of a physical random access channel PRACH, which is executed by a user equipment and includes:

[0007] Obtaining network side configuration, including a first indicator for indicating whether to enable PRACH frequency hopping transmission, one or more PRACH repetition transmission times, and multiple PRACH transmission opportunities for PRACH repetition transmission;

[0008] According to the network side configuration, multiple PRACH transmission opportunities within one or more association pattern periods of synchronization signal blocks SSB and PRACH transmission opportunities are divided into one or more PRACH transmission opportunity groups;

[0009] PRACH repetitive transmission is performed within the PRACH transmission opportunity group.

[0010] In some embodiments, the one or more PRACH transmission opportunity groups include a first PRACH transmission opportunity group, and further include: descrambling and detecting the first downlink control information within a time window corresponding to the first PRACH transmission opportunity group.

[0011] In some embodiments, the starting position of the time window is located after the first PRACH transmission opportunity group.

[0012] In some embodiments, it also includes: if the first downlink control information is successfully detected, receiving a transport block in a physical downlink shared channel PDSCH, parsing the transport block, and if a random preamble identifier in the transport block is identified, determining that the PRACH is successfully transmitted.

[0013] The embodiment of the present disclosure provides a transmission timing indication method for repeated transmission of a physical random access channel PRACH, which is executed by a network device and includes:

[0014] Perform network side configuration, including a first indicator for indicating whether to enable PRACH frequency hopping transmission, one or more PRACH repetition transmission times, and multiple PRACH transmission opportunities for PRACH repetition transmission;

[0015] According to the network side configuration, multiple PRACH transmission opportunities within one or more association pattern periods of synchronization signal blocks SSB and PRACH transmission opportunities are divided into one or more PRACH transmission opportunity groups;

[0016] Joint detection is performed on PRACH repeated transmissions within a PRACH transmission opportunity group.

[0017] In some embodiments, the one or more PRACH transmission opportunity groups include a first PRACH transmission opportunity group, further comprising:

[0018] Sending first downlink control information within a time window corresponding to a first PRACH transmission opportunity group;

[0019] A transport block is sent in a physical downlink shared channel PDSCH, wherein the transport block includes a random preamble identifier.

[0020] In some embodiments, the starting position of the time window is located after the first PRACH transmission opportunity group.

[0021] In some embodiments, when the first indicator indicates that PRACH frequency hopping transmission is enabled, adjacent PRACH transmission opportunities in the PRACH transmission opportunity group are located at different frequency domain positions; when the first indicator indicates that PRACH frequency hopping transmission is not enabled, each PRACH transmission opportunity in the PRACH transmission opportunity group is located at the same frequency domain position.

[0022] In some embodiments, PRACH transmission opportunities in the same PRACH transmission opportunity group have the same SSB mapping relationship.

[0023] In some embodiments, PRACH transmission occasions belonging to the same PRACH transmission occasion group do not overlap in the time domain.

[0024] In some embodiments, the PRACH transmission opportunity group only includes valid PRACH transmission opportunities.

[0025] In some embodiments, dividing into one or more PRACH transmission opportunity groups includes: starting from the first PRACH transmission opportunity in the time domain within one or more associated pattern periods of the SSB and PRACH transmission opportunities, a plurality of valid PRACH transmission opportunities consecutive in the time domain are divided into a PRACH transmission opportunity group, and the number of PRACH transmission opportunities in a PRACH transmission opportunity group is determined by the number of PRACH repeated transmissions configured on the network side.

[0026] In some embodiments, the division into one or more PRACH transmission opportunity groups includes: when the network side configuration includes a number of PRACH repetition transmissions, starting from the first PRACH transmission opportunity in the time domain within one or more associated pattern periods of the SSB and PRACH transmission opportunities, every K PRACH transmission opportunities are divided into a first PRACH transmission opportunity group, where K is the number of PRACH repetition transmissions in the network side configuration.

[0027] In some embodiments, the division into one or more PRACH transmission opportunity groups includes: when the network side configuration includes multiple PRACH repetition transmission times, starting from the first PRACH transmission opportunity in the time domain within one or more associated pattern periods of the SSB and the PRACH transmission opportunity, the PRACH transmission opportunities at different time domain positions are divided into first PRACH transmission opportunity groups according to the multiple PRACH transmission times, and there are no PRACH transmission opportunities that overlap in the time domain between the first PRACH transmission opportunity groups.

[0028] In some embodiments, L rounds of division are performed in the order of the number of PRACH repeated transmissions from small to large or from large to small, where L is a positive integer. After L rounds of division, if there are still remaining PRACH transmission opportunities, and the remaining PRACH transmission opportunities cannot complete a full round of division, then the remaining PRACH transmission opportunities are not used for PRACH repeated transmissions, wherein each round of division includes: dividing PRACH transmission opportunities at different time domain positions into first PRACH transmission opportunity groups according to multiple PRACH transmission numbers, and there are no PRACH transmission opportunities with overlapping time domains between the first PRACH transmission opportunity groups.

[0029] In some embodiments, division into one or more PRACH transmission opportunity groups includes: when the network side configuration includes multiple PRACH repetition transmission times, starting from the first PRACH transmission opportunity in the time domain within one or more associated pattern periods of the SSB and the PRACH transmission opportunity, the PRACH transmission opportunities at different time domain positions are divided into a first PRACH transmission opportunity group according to the maximum PRACH repetition transmission number, and the PRACH transmission opportunities within the first PRACH transmission opportunity group are divided into a second PRACH transmission opportunity group according to a non-maximum PRACH repetition transmission number.

[0030] In some embodiments, dividing the first PRACH transmission opportunity group includes: dividing every M1 PRACH transmission opportunities into one first PRACH transmission opportunity group, where M1 is the maximum number of PRACH repeated transmissions in the network side configuration.

[0031] In some embodiments, dividing the second PRACH transmission opportunity group includes: starting from the first PRACH transmission opportunity in the first PRACH transmission opportunity group, dividing M2 PRACH transmission opportunities into a second PRACH transmission opportunity group, where M2 is the non-maximum PRACH repeated transmission number in the network side configuration.

[0032] In some embodiments, dividing the second PRACH transmission opportunity group includes: starting from the first PRACH transmission opportunity in the first PRACH transmission opportunity group, dividing every M2 PRACH transmission opportunities into a second PRACH transmission opportunity group until the number of remaining PRACH transmission opportunities is less than M2, where M2 is the non-maximum number of PRACH repeated transmissions in the network side configuration.

[0033] In some embodiments, the division into one or more PRACH transmission opportunity groups includes: when the network side configuration includes multiple PRACH repetition transmission times, starting from the first PRACH transmission opportunity in the time domain within one or more associated pattern periods of the SSB and PRACH transmission opportunities, every M3 PRACH transmission opportunities are divided into a first PRACH transmission opportunity group until the number of remaining PRACH transmission opportunities is less than M3, where M3 is the different PRACH repetition transmission times in the network side configuration.

[0034] In some embodiments, dividing into one or more PRACH transmission opportunity groups includes: when the first indicator indicates that PRACH frequency hopping transmission is not enabled, PRACH transmission opportunities in the same PRACH transmission opportunity group are at the same frequency domain position.

[0035] In some embodiments, the division into one or more PRACH transmission opportunity groups includes: when the first indicator indicates to turn on PRACH frequency hopping transmission, the division starts from the first PRACH transmission opportunity in the time domain and frequency domain within one or more associated pattern periods of the SSB and PRACH transmission opportunities, and the network side configuration also includes a first offset value for frequency hopping, and the corresponding PRACH transmission opportunity is selected according to the first offset value and divided into the same PRACH transmission opportunity group.

[0036] In some embodiments, based on the mapping relationship between SSB and PRACH transmission timing, when the first offset value has a unique value, the first offset value is set by default.

[0037] In some embodiments, when the first indicator is set by default, it indicates that PRACH frequency hopping transmission is not enabled.

[0038] An embodiment of the present disclosure proposes a user equipment, comprising: a memory; and a processor coupled to the memory, wherein the processor is configured to execute a transmission timing indication method for PRACH repeated transmission performed by the user equipment based on instructions stored in the memory.

[0039] The embodiment of the present disclosure provides a user equipment, including: a module for executing a transmission timing indication method of PRACH repeated transmission performed by the user equipment.

[0040] An embodiment of the present disclosure proposes a network device, comprising: a memory; and a processor coupled to the memory, wherein the processor is configured to execute a transmission timing indication method for PRACH repeated transmission performed by the network device based on instructions stored in the memory.

[0041] The embodiment of the present disclosure provides a network device, including: a module for executing a transmission timing indication method for PRACH repeated transmission executed by the network device.

[0042] The embodiment of the present disclosure provides a communication system, including: user equipment and network equipment.

[0043] The embodiment of the present disclosure provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the steps of the transmission timing indication method for PRACH repeated transmission are implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. The present disclosure can be more clearly understood according to the following detailed description with reference to the drawings.

[0045] Obviously, the drawings described below are only some embodiments of the present disclosure, and a person skilled in the art can obtain other drawings based on these drawings without creative work.

[0046] Figure 1 A flow chart of a method for indicating a transmission timing of PRACH repeated transmission according to some embodiments of the present disclosure is shown, and the method is executed by a user equipment.

[0047] Figure 2 A flow chart of a method for indicating transmission timing of PRACH repeated transmission according to some embodiments of the present disclosure is shown, and the method is executed by a network device.

[0048] Figure 3 A schematic diagram of a PRACH transmission timing group division scheme of scheme 1 of some embodiments of the present disclosure is shown.

[0049] Figure 4A schematic diagram of a PRACH transmission timing group division scheme of sub-scheme 2-1 in scheme 2 of some embodiments of the present disclosure is shown.

[0050] Figure 5 A schematic diagram of a PRACH transmission timing group division scheme of sub-scheme 2-2 and scheme 3 in scheme 2 of some embodiments of the present disclosure is shown.

[0051] Figure 6 A PRACH transmission timing group division scheme for enabling PRACH frequency hopping transmission according to some embodiments of the present disclosure is shown.

[0052] Figure 7 A schematic diagram showing user equipment according to some embodiments of the present disclosure.

[0053] Figure 8 A schematic diagram showing user equipment according to some embodiments of the present disclosure.

[0054] Fig. 9 A schematic diagram showing a network device according to some embodiments of the present disclosure.

[0055] Fig.10 A schematic diagram showing a network device according to some embodiments of the present disclosure.

[0056] Fig.11 A schematic diagram showing a communication system according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure.

[0058] Unless otherwise specified, descriptions such as “first” and “second” in the present disclosure are used to distinguish different objects and are not used to indicate meanings such as size or time sequence.

[0059] It should also be understood that in the embodiments of the present disclosure, “plurality” may refer to two or more than two, and “at least one” may refer to one, two, or more than two.

[0060] It should also be understood that any component, data or structure mentioned in the embodiments of the present disclosure can generally be understood as one or more, unless explicitly limited or otherwise indicated in the context.

[0061] It should also be understood that the description of the various embodiments in the present disclosure focuses on the differences between the various embodiments, and the same or similar aspects thereof can be referenced to each other, and for the sake of brevity, they will not be described one by one.

[0062] The following describes the difference between PRACH retransmission and PRACH repetition or multiple transmissions. PRACH retransmission refers to a new PRACH transmission process that is re-initiated after a PRACH transmission process fails, where a PRACH transmission process includes a single PRACH transmission or a PRACH repetition. PRACH repetition refers to multiple PRACH transmissions on multiple PRACH transmission occasions in a PRACH transmission process, where the number of multiple PRACH transmission occasions is equal to the number of PRACH repetitions.

[0063] Figure 1 A flowchart of a method for indicating a transmission timing of PRACH repeated transmission according to some embodiments of the present disclosure is shown.

[0064] like Figure 1 As shown, the method of this embodiment is executed by a user equipment, and includes steps 110-130, and may further include steps 140 and 150 as needed.

[0065] In step 110, the network side configuration is obtained, including a first indicator for indicating whether to enable PRACH frequency hopping transmission, one or more PRACH repetition transmission times, and multiple PRACH transmission opportunities for PRACH repetition transmission.

[0066] In step 120, according to the network side configuration, multiple PRACH transmission opportunities within one or more associated pattern periods of a synchronization signal block (SSB) and a PRACH transmission opportunity are divided into one or more PRACH transmission opportunity groups.

[0067] In step 130, PRACH repetitive transmission is performed within the PRACH transmission opportunity group.

[0068] In step 140, the one or more PRACH transmission opportunity groups include a first PRACH transmission opportunity group, and the first downlink control information is descrambled and detected within a time window corresponding to the first PRACH transmission opportunity group.

[0069] The starting position of the time window is located after the first PRACH transmission opportunity group.

[0070] The first downlink control information is, for example, DCI 1_0.

[0071] In step 150, if the first downlink control information is successfully detected, a transport block is received in a PDSCH (Physical Downlink Shared Channel), and the transport block is parsed. If a RAPID (Random Access Preamble identifier) ​​in the transport block is identified, it is determined that the PRACH is successfully transmitted, and the subsequent random access process is continued.

[0072] If the UE successfully detects DCI 1_0 and receives a transport block in the corresponding PDSCH, the UE passes the transport block to the upper layer, which parses the transport block. If the upper layer recognizes the RAPID, the upper layer indicates the corresponding uplink grant to the physical layer. At this point, the UE is considered to have successfully transmitted the PRACH, and the UE continues to perform the subsequent random access process.

[0073] Figure 2 A flowchart of a method for indicating a transmission timing of PRACH repeated transmission according to some embodiments of the present disclosure is shown.

[0074] like Figure 2 As shown, the method of this embodiment is executed by a network device, and includes steps 210-230, and may further include steps 240 and 250 as required. The network device is, for example, a base station.

[0075] In step 210, the network side configuration is performed, including a first indicator for indicating whether to enable PRACH frequency hopping transmission, one or more PRACH repetition transmission times, and multiple PRACH transmission opportunities for PRACH repetition transmission.

[0076] In step 220, according to the network side configuration, multiple PRACH transmission opportunities within one or more associated pattern periods of synchronization signal blocks SSB and PRACH transmission opportunities are divided into one or more PRACH transmission opportunity groups.

[0077] At step 230, joint detection is performed on PRACH repetitive transmissions within the PRACH transmission opportunity group.

[0078] Joint detection is performed on PRACHs transmitted at multiple PRACH transmission timings in the PRACH transmission timing group. PRACH can be detected at any one of the multiple PRACH transmission timings in the PRACH transmission timing group.

[0079] In step 240, the one or more PRACH transmission opportunity groups include a first PRACH transmission opportunity group, and the first downlink control information is sent within a time window corresponding to the first PRACH transmission opportunity group.

[0080] The starting position of the time window is located after the first PRACH transmission opportunity group.

[0081] The first downlink control information is, for example, DCI 1_0.

[0082] In step 250, a transport block is sent in a physical downlink shared channel PDSCH, wherein the transport block includes a random preamble identifier.

[0083] In the disclosed embodiment, according to the network side configuration, both the network device and the user device can determine the PRACH transmission timing group for PRACH repeated transmission, so that the user side and the network side have consistent understanding of the resource location for actual PRACH repeated transmission, so that the network side can jointly detect the PRACH repeated transmission of the same user terminal, thereby improving the performance of PRACH repeated transmission.

[0084] Since the user equipment and the network equipment have the same understanding of the resource location for actual PRACH repeated transmission based on the network side configuration, the content of determining the resource location for actual PRACH repeated transmission based on the network side configuration to be described later is applicable to both the user equipment and the network equipment.

[0085] 1-1) The first indicator may be 1 bit in size and indicates whether PRACH frequency hopping transmission is enabled.

[0086] 1-2) When the first indicator is set by default, PRACH frequency hopping transmission is disabled by default.

[0087] 2-1) The PRACH transmission opportunities in the same PRACH transmission opportunity group have the same SSB (Synchronization Signal Block) mapping relationship. That is, the PRACH transmission opportunities in the same PRACH transmission opportunity group correspond to the same SSB.

[0088] 2-2) PRACH transmission opportunities in the same PRACH transmission opportunity group do not overlap in the time domain. That is, the PRACH transmission opportunities in the same PRACH transmission opportunity group are located at different time domain positions.

[0089] 2-3) The PRACH transmission timing group only includes valid PRACH transmission timings. Invalid PRACH transmission timings are not included in the PRACH transmission timing group.

[0090] 2-4) The division into one or more PRACH transmission opportunity groups includes: starting from the first PRACH transmission opportunity in the time domain within one or more associated pattern periods of the SSB and the PRACH transmission opportunity, a plurality of valid PRACH transmission opportunities that are continuous in the time domain are divided into a PRACH transmission opportunity group. The number of PRACH transmission opportunities in a PRACH transmission opportunity group is determined by the number of PRACH repetition transmissions in the network side configuration.

[0091] Scheme 0, Scheme 1, Scheme 2, and Scheme 3 for dividing one or more PRACH transmission opportunity groups are applicable to both situations where PRACH frequency hopping transmission is not enabled and situations where PRACH frequency hopping transmission is enabled. One of the differences is that when the first indicator indicates that PRACH frequency hopping transmission is enabled, adjacent PRACH transmission opportunities in the PRACH transmission opportunity group are located at different frequency domain positions; when the first indicator indicates that PRACH frequency hopping transmission is not enabled, each PRACH transmission opportunity in the PRACH transmission opportunity group is located at the same frequency domain position. In order to make the description more concise, Scheme 0, Scheme 1, Scheme 2, and Scheme 3 focus on describing the common parts that are applicable to both situations where PRACH frequency hopping transmission is not enabled and situations where PRACH frequency hopping transmission is enabled, and the differences will be described separately later.

[0092] Scenario 0:

[0093] When the network side configuration includes a number of PRACH repetition transmissions, the number of PRACH transmission opportunities in the PRACH transmission opportunity group is equal to the number of PRACH repetition transmissions in the network side configuration. At this time, starting from the first PRACH transmission opportunity in the time domain within one or more associated pattern periods of the SSB and PRACH transmission opportunities, every K PRACH transmission opportunities are divided into a first PRACH transmission opportunity group, where K is the number of PRACH repetition transmissions in the network side configuration.

[0094] Scenario 1:

[0095] When the network side configuration includes multiple PRACH repetition transmission times, the first PRACH transmission time groups are divided respectively according to the multiple PRACH transmission times, and there are no overlapping PRACH transmission time periods between the first PRACH transmission time groups.

[0096] When the network side configuration includes multiple PRACH repetition transmission times, starting from the first PRACH transmission time in the time domain within one or more associated pattern periods of the SSB and the PRACH transmission time, the PRACH transmission times at different time domain positions are divided into first PRACH transmission time groups according to the multiple PRACH transmission times, and there are no PRACH transmission times that overlap in the time domain between the first PRACH transmission time groups.

[0097] According to the order of the number of PRACH repeated transmissions from small to large or from large to small, L rounds of division are performed, L is a positive integer, after L rounds of division, if there are still remaining PRACH transmission opportunities, and the remaining PRACH transmission opportunities cannot complete a full round of division, then the remaining PRACH transmission opportunities are not used for PRACH repeated transmission. Wherein, each round of division includes: according to multiple PRACH transmission times, PRACH transmission opportunities at different time domain positions are divided into first PRACH transmission opportunity groups, and there are no PRACH transmission opportunities with overlapping time domains between the first PRACH transmission opportunity groups.

[0098] like Figure 3 In the scheme 1 shown, it is assumed that within one or more associated pattern periods of the SSB and the PRACH transmission opportunity, there are 8 PRACH transmission opportunities with the same mapping relationship with the SSB in the time domain (the frequency division multiplexing PRACH transmission opportunity is counted as 1, which refers to the number of PRACH transmission opportunities with different time domain positions), the frequency division multiplexing parameter of PRACH is 2, the number of PRACH repetition transmissions configured on the network side is 2, 4 times, and the network side does not enable PRACH frequency hopping transmission. Taking the number of PRACH transmissions from small to large as an example, according to the number of PRACH repetition transmissions = 2, PRACH transmission opportunities #0 and #2 are divided into one PRACH transmission opportunity group, and PRACH transmission opportunities #1 and #3 are divided into one PRACH transmission opportunity group; according to the number of PRACH repetition transmissions = 4, PRACH transmission opportunities #4, #6, #8, #10 are divided into one PRACH transmission opportunity group, and PRACH transmission opportunities #5, #7, #9, #11 are divided into one PRACH transmission opportunity group. The remaining PRACH transmission opportunities #12, #13, #14, and #15 cannot complete a full round of division and are therefore not used for PRACH repeated transmission under the current configuration. In summary, in this embodiment, there are 2 PRACH transmission opportunity groups with a PRACH repeated transmission number of 2 and 2 PRACH transmission opportunity groups with a PRACH repeated transmission number of 4.

[0099] Scenario 2:

[0100] When the network side configuration includes multiple PRACH repetition transmission times, the first PRACH transmission time group is first divided according to the maximum PRACH repetition transmission number, and then the second PRACH transmission time group is divided within the first PRACH transmission time group according to the non-maximum PRACH repetition transmission number.

[0101] When the network side configuration includes multiple PRACH repetition transmission times, starting from the first PRACH transmission time in the time domain within one or more associated pattern periods of the SSB and the PRACH transmission time, the PRACH transmission times at different time domain positions are divided into a first PRACH transmission time group according to the maximum PRACH repetition transmission number, and the PRACH transmission times in the first PRACH transmission time group are divided into a second PRACH transmission time group according to the non-maximum PRACH repetition transmission number.

[0102] Among them, dividing the first PRACH transmission opportunity group includes: starting from the first PRACH transmission opportunity in the time domain within one or more associated pattern periods of the SSB and PRACH transmission opportunities, every M1 PRACH transmission opportunities are divided into a first PRACH transmission opportunity group, where M1 is the maximum number of PRACH repeated transmissions in the network side configuration.

[0103] Two schemes are provided for dividing the second PRACH transmission opportunity group, namely sub-scheme 2-1 and sub-scheme 2-2.

[0104] Sub-scheme 2-1: Starting from the first PRACH transmission opportunity in the first PRACH transmission opportunity group, M2 PRACH transmission opportunities are divided into a second PRACH transmission opportunity group, where M2 is the non-maximum number of PRACH repeated transmissions in the network side configuration.

[0105] Sub-scheme 2-2: Starting from the first PRACH transmission opportunity in the first PRACH transmission opportunity group, every M2 PRACH transmission opportunities are divided into a second PRACH transmission opportunity group until the number of remaining PRACH transmission opportunities is less than M2, where M2 is the non-maximum number of PRACH repeated transmissions in the network side configuration.

[0106] Below are some examples of the use of the two sub-schemas.

[0107] Assume that within one or more associated pattern periods of SSB and PRACH transmission opportunities, there are 8 PRACH transmission opportunities that have the same mapping relationship with SSB in the time domain (the frequency-division multiplexing PRACH transmission opportunity counts as 1, which refers to the number of PRACH transmission opportunities with different time domain positions), the frequency-division multiplexing parameter of PRACH is 2, the number of PRACH repetition transmissions configured on the network side is 2, 4, and 8 times, and PRACH frequency hopping transmission is not enabled on the network side.

[0108] like Figure 4Sub-scheme 2-1 shown: According to the number of PRACH repeated transmissions = 8, PRACH transmission opportunities #0, #2, #4, #6, #8, #10, #12, #14 are divided into a first PRACH transmission opportunity group, and PRACH transmission opportunities #1, #3, #5, #7, #9, #11, #13, #15 are divided into a first PRACH transmission opportunity group. According to the number of PRACH repeated transmissions = 2, PRACH transmission opportunities #1, #3 are divided into a second PRACH transmission opportunity group, and PRACH transmission opportunities #0, #2 are divided into a second PRACH transmission opportunity group. According to the number of PRACH repeated transmissions = 4, PRACH transmission opportunities #1, #3, #5, #7 are divided into a second PRACH transmission opportunity group, and PRACH transmission opportunities #0, #2, #4, #6 are divided into a second PRACH transmission opportunity group. In summary, in this embodiment, there are 2 PRACH transmission opportunity groups with a PRACH repetition transmission number of 2, 2 PRACH transmission opportunity groups with a PRACH repetition transmission number of 4, and 2 PRACH transmission opportunity groups with a PRACH repetition transmission number of 8.

[0109] like Figure 5Sub-scheme 2-2 shown: according to the number of PRACH repeated transmissions = 8, PRACH transmission opportunities #0, #2, #4, #6, #8, #10, #12, #14 are divided into a first PRACH transmission opportunity group, and PRACH transmission opportunities #1, #3, #5, #7, #9, #11, #13, #15 are divided into a first PRACH transmission opportunity group. According to the number of PRACH repeated transmissions = 2, PRACH transmission opportunities #1 and #3 are divided into a second PRACH transmission opportunity group, PRACH transmission opportunities #0 and #2 are divided into a second PRACH transmission opportunity group, PRACH transmission opportunities #5 and #7 are divided into a second PRACH transmission opportunity group, PRACH transmission opportunities #4 and #6 are divided into a second PRACH transmission opportunity group, PRACH transmission opportunities #9 and #11 are divided into a second PRACH transmission opportunity group, PRACH transmission opportunities #8 and #10 are divided into a second PRACH transmission opportunity group, PRACH transmission opportunities #13 and #15 are divided into a second PRACH transmission opportunity group, and PRACH transmission opportunities #12 and #14 are divided into a second PRACH transmission opportunity group. According to the number of PRACH repetition transmissions = 4, PRACH transmission opportunities #1, #3, #5, #7 are divided into a second PRACH transmission opportunity group, PRACH transmission opportunities #0, #2, #4, #6 are divided into a second PRACH transmission opportunity group, PRACH transmission opportunities #9, #11, #13, #15 are divided into a second PRACH transmission opportunity group, and PRACH transmission opportunities #8, #10, #12, #14 are divided into a second PRACH transmission opportunity group. In summary, in this embodiment, there are 8 PRACH transmission opportunity groups with a PRACH repetition transmission number of 2, 4 PRACH transmission opportunity groups with a PRACH repetition transmission number of 4, and 2 PRACH transmission opportunity groups with a PRACH repetition transmission number of 8.

[0110] Scenario 3:

[0111] When the network side configuration includes multiple PRACH repetition transmission times, the first PRACH transmission opportunity group is divided respectively according to the multiple PRACH repetition transmission times.

[0112] When the network side configuration includes multiple PRACH repetition transmission times, starting from the first PRACH transmission opportunity in the time domain within one or more associated pattern periods of the SSB and PRACH transmission opportunities, every M3 PRACH transmission opportunities are divided into a first PRACH transmission opportunity group until the number of remaining PRACH transmission opportunities is less than M3, where M3 is the different PRACH repetition transmission times in the network side configuration.

[0113] Some examples of using Scheme 3 are listed below.

[0114] Assume that within one or more associated pattern periods of SSB and PRACH transmission opportunities, there are 8 PRACH transmission opportunities with the same mapping relationship with SSB in the time domain (the frequency division multiplexing PRACH transmission opportunity is counted as 1, which refers to the number of PRACH transmission opportunities with different time domain positions), the frequency division multiplexing parameter of PRACH is 2, the number of PRACH repetitions configured on the network side is 2, 4, and 8 times, and the network side does not enable PRACH frequency hopping transmission. Under the above configuration, the division result of this embodiment happens to be as follows Figure 5 As shown, the difference is that: Scheme 3 includes the first PRACH transmission timing group, while sub-scheme 2-2 includes the first / second PRACH transmission timing group.

[0115] like Figure 5Scheme 3 shown: According to the number of PRACH repeated transmissions = 8, PRACH transmission opportunities #0, #2, #4, #6, #8, #10, #12, #14 are divided into a first PRACH transmission opportunity group, and PRACH transmission opportunities #1, #3, #5, #7, #9, #11, #13, #15 are divided into a first PRACH transmission opportunity group. According to the number of PRACH repeated transmissions = 2, PRACH transmission opportunities #1 and #3 are divided into a first PRACH transmission opportunity group, PRACH transmission opportunities #0 and #2 are divided into a first PRACH transmission opportunity group, PRACH transmission opportunities #5 and #7 are divided into a first PRACH transmission opportunity group, PRACH transmission opportunities #4 and #6 are divided into a first PRACH transmission opportunity group, PRACH transmission opportunities #9 and #11 are divided into a first PRACH transmission opportunity group, PRACH transmission opportunities #8 and #10 are divided into a first PRACH transmission opportunity group, PRACH transmission opportunities #13 and #15 are divided into a first PRACH transmission opportunity group, and PRACH transmission opportunities #12 and #14 are divided into a first PRACH transmission opportunity group. According to the number of PRACH repetition transmissions = 4, PRACH transmission opportunities #1, #3, #5, #7 are divided into a first PRACH transmission opportunity group, PRACH transmission opportunities #0, #2, #4, #6 are divided into a first PRACH transmission opportunity group, PRACH transmission opportunities #9, #11, #13, #15 are divided into a first PRACH transmission opportunity group, and PRACH transmission opportunities #8, #10, #12, #14 are divided into a first PRACH transmission opportunity group. In summary, in this embodiment, there are 8 PRACH transmission opportunity groups with a PRACH repetition transmission number of 2, 4 PRACH transmission opportunity groups with a PRACH repetition transmission number of 4, and 2 PRACH transmission opportunity groups with a PRACH repetition transmission number of 8.

[0116] As mentioned above, Scheme 0, Scheme 1, Scheme 2, and Scheme 3 are applicable to both situations where PRACH frequency hopping transmission is not enabled and situations where PRACH frequency hopping transmission is enabled. The above focuses on describing the common parts of Scheme 0, Scheme 1, Scheme 2, and Scheme 3 that are applicable to both situations where PRACH frequency hopping transmission is not enabled and situations where PRACH frequency hopping transmission is enabled. The following describes the difference between the two situations where Scheme 0, Scheme 1, Scheme 2, and Scheme 3 are applicable to both situations where PRACH frequency hopping transmission is not enabled and situations where PRACH frequency hopping transmission is enabled.

[0117] Solution 0, Solution 1, Solution 2, Solution 3: When the first indicator indicates that PRACH frequency hopping transmission is not enabled, the PRACH transmission opportunities in the same PRACH transmission opportunity group are at the same frequency domain position.

[0118] Scheme 0, Scheme 1, Scheme 2, Scheme 3: When the first indicator indicates to turn on PRACH frequency hopping transmission, the division starts from the first PRACH transmission opportunity in the time domain and frequency domain within one or more associated pattern periods of the SSB and PRACH transmission opportunities, and the network side configuration also includes a first offset value for frequency hopping. According to the first offset value, the corresponding PRACH transmission opportunity is selected and divided into the same PRACH transmission opportunity group.

[0119] Based on the mapping relationship between SSB and PRACH transmission opportunity, when the first offset value has a unique value, the first offset value is set by default. When the first offset value is set by default, there is currently only one PRACH transmission opportunity group division scheme, and only PRACH transmission opportunities at different frequency domain positions need to be selected and divided into the PRACH transmission opportunity group.

[0120] like Figure 6 The PRACH transmission opportunity group division scheme for enabling PRACH frequency hopping transmission is shown. Assume that within one or more associated pattern periods of SSB and PRACH transmission opportunity, there are 4 PRACH transmission opportunities with the same mapping relationship with SSB in the time domain (the frequency division multiplexing transmission opportunity counts as 1, which refers to the number of PRACH transmission opportunities with different time domain positions), the frequency division multiplexing parameter of PRACH is 4, the number of PRACH repetition transmissions configured on the network side is 2,4 times, the network side is configured to enable PRACH frequency hopping transmission, and the first offset value is default. Under the above network side configuration, according to the division method of sub-scheme 2-1 of scheme 2, according to the number of PRACH repeated transmissions = 4, PRACH transmission opportunities #0, #6, #8, #14 are divided into a first PRACH transmission opportunity group; PRACH transmission opportunities #1, #7, #9, #15 are divided into a first PRACH transmission opportunity group; PRACH transmission opportunities #2, #4, #10, #12 are divided into a first PRACH transmission opportunity group; PRACH transmission opportunities #3, #5, #11, #13 are divided into a first PRACH transmission opportunity group. According to the number of PRACH repetition transmissions = 2, PRACH transmission opportunities #0 and #6 are divided into a second PRACH transmission opportunity group; PRACH transmission opportunities #1 and #7 are divided into a second PRACH transmission opportunity group; PRACH transmission opportunities #2 and #4 are divided into a second PRACH transmission opportunity group; PRACH transmission opportunities #3 and #5 are divided into a second PRACH transmission opportunity group. In summary, in this embodiment, there are 4 PRACH transmission opportunity groups with a PRACH repetition transmission number of 2, and there are 4 PRACH transmission opportunity groups with a PRACH repetition transmission number of 4.

[0121] Figure 7A schematic diagram showing user equipment according to some embodiments of the present disclosure.

[0122] like Figure 7 As shown, the user equipment 700 of this embodiment includes: a memory 710 and a processor 720 coupled to the memory 710 , and the processor 720 is configured to execute the method in any of the aforementioned embodiments based on the instructions stored in the memory 710 .

[0123] The user equipment 700 may further include an input / output interface 730 , a network interface 740 , a storage interface 750 , etc. These interfaces 730 , 740 , 750 , the memory 710 , and the processor 720 may be connected, for example, via a bus 760 .

[0124] The memory 710 may include, for example, a system memory, a fixed non-volatile storage medium, etc. The system memory may store, for example, an operating system, an application program, a boot loader, and other programs.

[0125] The processor 720 may be implemented by a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistors and other discrete hardware components.

[0126] Among them, the input and output interface 730 provides a connection interface for input and output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 740 provides a connection interface for various networked devices. The storage interface 750 provides a connection interface for external storage devices such as SD cards and USB flash drives. The bus 760 can use any bus structure among a variety of bus structures. For example, the bus structure includes but is not limited to the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MCA) bus, and the Peripheral Component Interconnect (PCI) bus.

[0127] Figure 8 A schematic diagram showing user equipment according to some embodiments of the present disclosure.

[0128] like Figure 8 As shown, the user equipment 800 of this embodiment includes the following modules.

[0129] The configuration acquisition module 810 is configured to acquire the network side configuration, including a first indicator for indicating whether to enable PRACH frequency hopping transmission, one or more PRACH repetition transmission times, and multiple PRACH transmission opportunities for PRACH repetition transmission;

[0130] The division module 820 is configured to divide a plurality of PRACH transmission opportunities within one or more association pattern periods of a synchronization signal block SSB and a PRACH transmission opportunity into one or more PRACH transmission opportunity groups according to the network side configuration;

[0131] The repeated transmission module 830 is configured to perform PRACH repeated transmission within the PRACH transmission opportunity group.

[0132] The processing module 840 is configured to descramble and detect the first downlink control information in the time window corresponding to the first PRACH transmission opportunity group. The starting position of the time window is located after the first PRACH transmission opportunity group. If the first downlink control information is successfully detected, a transmission block is received in a physical downlink shared channel PDSCH, and the transmission block is parsed. If a random preamble code identifier in the transmission block is identified, it is determined that the PRACH is successfully transmitted.

[0133] Fig. 9 A schematic diagram showing a network device according to some embodiments of the present disclosure.

[0134] like Fig. 9 As shown, the network device 900 of this embodiment includes: a memory 910 and a processor 920 coupled to the memory 910 , and the processor 920 is configured to execute the method in any of the aforementioned embodiments based on the instructions stored in the memory 910 .

[0135] The network device 900 may further include an input / output interface 930 , a network interface 940 , a storage interface 950 , etc. These interfaces 930 , 940 , 950 , the memory 910 , and the processor 920 may be connected via a bus 960 , for example.

[0136] The memory 910 may include, for example, a system memory, a fixed non-volatile storage medium, etc. The system memory may store, for example, an operating system, an application program, a boot loader, and other programs.

[0137] Among them, the processor 920 can be implemented by discrete hardware components such as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistors.

[0138] Among them, the input and output interface 930 provides a connection interface for input and output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 940 provides a connection interface for various networked devices. The storage interface 950 provides a connection interface for external storage devices such as SD cards and USB flash drives. The bus 960 can use any bus structure among a variety of bus structures. For example, the bus structure includes but is not limited to the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MCA) bus, and the Peripheral Component Interconnect (PCI) bus.

[0139] Fig.10 A schematic diagram showing a network device according to some embodiments of the present disclosure.

[0140] like Fig.10 As shown, the network device 1000 of this embodiment includes the following modules.

[0141] The configuration module 1010 is configured to perform network side configuration, including a first indicator for indicating whether to enable PRACH frequency hopping transmission, one or more PRACH repetition transmission times, and multiple PRACH transmission opportunities for PRACH repetition transmission;

[0142] The division module 1020 is configured to divide a plurality of PRACH transmission opportunities within one or more association pattern periods of a synchronization signal block SSB and a PRACH transmission opportunity into one or more PRACH transmission opportunity groups according to the network side configuration;

[0143] The detection module 1030 is configured to perform joint detection on PRACH repeated transmissions within the PRACH transmission opportunity group.

[0144] The sending module 1040 is configured to send the first downlink control information in the time window corresponding to the first PRACH transmission opportunity group, send a transmission block in the physical downlink shared channel PDSCH, and the transmission block includes a random preamble code identifier. The starting position of the time window is located after the first PRACH transmission opportunity group.

[0145] Fig.11 A schematic diagram showing a communication system according to some embodiments of the present disclosure.

[0146] like Fig.11 As shown, the communication system 1100 of this embodiment includes: user equipment 700, 800 and network equipment 900, 1000.

[0147] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more non-transient computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer program code.

[0148] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0149] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0150] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0151] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A method for indicating a transmission timing of repeated transmission of a physical random access channel (PRACH), executed by a user equipment, comprising: Obtaining network side configuration, including a first indicator for indicating whether to enable PRACH frequency hopping transmission, one or more PRACH repetition transmission times, and multiple PRACH transmission opportunities for PRACH repetition transmission; According to the network side configuration, multiple PRACH transmission opportunities within one or more association pattern periods of synchronization signal blocks SSB and PRACH transmission opportunities are divided into one or more PRACH transmission opportunity groups; PRACH repetitive transmission is performed within the PRACH transmission opportunity group.

2. The method according to claim 1, wherein the one or more PRACH transmission opportunity groups include a first PRACH transmission opportunity group, further comprising: The first downlink control information is descrambled and detected within a time window corresponding to the first PRACH transmission opportunity group.

3. According to the method of claim 2, the starting position of the time window is located after the first PRACH transmission opportunity group.

4. The method according to claim 2, further comprising: If the first downlink control information is successfully detected, a transport block is received in a physical downlink shared channel PDSCH, and the transport block is parsed. If a random preamble identifier in the transport block is identified, it is determined that the PRACH is successfully transmitted.

5. A method for indicating a transmission timing of repeated transmission of a physical random access channel PRACH, executed by a network device, comprising: Perform network side configuration, including a first indicator for indicating whether to enable PRACH frequency hopping transmission, one or more PRACH repetition transmission times, and multiple PRACH transmission opportunities for PRACH repetition transmission; According to the network side configuration, multiple PRACH transmission opportunities within one or more association pattern periods of synchronization signal blocks SSB and PRACH transmission opportunities are divided into one or more PRACH transmission opportunity groups; Joint detection is performed on PRACH repeated transmissions within a PRACH transmission opportunity group.

6. The method according to claim 5, wherein the one or more PRACH transmission opportunity groups include a first PRACH transmission opportunity group, further comprising: Sending first downlink control information within a time window corresponding to a first PRACH transmission opportunity group; A transport block is sent in a physical downlink shared channel PDSCH, wherein the transport block includes a random preamble identifier.

7. The method according to claim 6, wherein the starting position of the time window is located after the first PRACH transmission opportunity group.

8. The method according to any one of claims 1 to 7, When the first indicator indicates to start PRACH frequency hopping transmission, adjacent PRACH transmission opportunities in the PRACH transmission opportunity group are located at different frequency domain positions; When the first indicator indicates that PRACH frequency hopping transmission is not enabled, each PRACH transmission opportunity in the PRACH transmission opportunity group is located at the same frequency domain position.

9. The method according to any one of claims 1 to 7, PRACH transmission opportunities belonging to the same PRACH transmission opportunity group have the same SSB mapping relationship.

10. The method according to any one of claims 1 to 7, PRACH transmission timings belonging to the same PRACH transmission timing group do not overlap in the time domain.

11. The method according to any one of claims 1 to 7, The PRACH transmission timing group only includes valid PRACH transmission timings.

12. The method according to any one of claims 1 to 7, wherein dividing into one or more PRACH transmission opportunity groups comprises: Starting from the first PRACH transmission opportunity in the time domain within one or more associated pattern periods of SSB and PRACH transmission opportunities, multiple valid PRACH transmission opportunities in the time domain are divided into a PRACH transmission opportunity group. The number of PRACH transmission opportunities in a PRACH transmission opportunity group is determined by the number of PRACH repeated transmissions configured on the network side.

13. The method according to claim 12, wherein dividing into one or more PRACH transmission opportunity groups comprises: When the network side configuration includes a number of PRACH repetition transmissions, starting from the first PRACH transmission opportunity in the time domain within one or more associated pattern periods of the SSB and PRACH transmission opportunities, every K PRACH transmission opportunities are divided into a first PRACH transmission opportunity group, where K is the number of PRACH repetition transmissions in the network side configuration.

14. The method according to claim 12, wherein dividing into one or more PRACH transmission opportunity groups comprises: When the network side configuration includes multiple PRACH repetition transmission times, starting from the first PRACH transmission time in the time domain within one or more associated pattern periods of the SSB and the PRACH transmission time, the PRACH transmission times at different time domain positions are divided into first PRACH transmission time groups according to the multiple PRACH transmission times, and there are no PRACH transmission times that overlap in the time domain between the first PRACH transmission time groups.

15. The method according to claim 14, According to the order of the number of PRACH repeated transmissions from small to large or from large to small, L rounds of division are performed, L is a positive integer. After L rounds of division, if there are still remaining PRACH transmission opportunities, and the remaining PRACH transmission opportunities cannot complete a full round of division, then the remaining PRACH transmission opportunities are not used for PRACH repeated transmissions. in, Each round of division includes: dividing PRACH transmission opportunities at different time domain positions into first PRACH transmission opportunity groups according to multiple PRACH transmission times, and there are no PRACH transmission opportunities with time domain overlap between the first PRACH transmission opportunity groups.

16. The method according to claim 12, wherein dividing into one or more PRACH transmission opportunity groups comprises: When the network side configuration includes multiple PRACH repetition transmission times, starting from the first PRACH transmission time in the time domain within one or more associated pattern periods of the SSB and the PRACH transmission time, the PRACH transmission times at different time domain positions are divided into a first PRACH transmission time group according to the maximum PRACH repetition transmission number, and the PRACH transmission times in the first PRACH transmission time group are divided into a second PRACH transmission time group according to the non-maximum PRACH repetition transmission number.

17. The method according to claim 16, dividing the first PRACH transmission opportunity group comprises: Every M1 PRACH transmission opportunities are divided into a first PRACH transmission opportunity group, wherein M1 is the maximum number of PRACH repeated transmissions in the network side configuration.

18. The method according to claim 16, dividing the second PRACH transmission opportunity group comprises: Starting from the first PRACH transmission opportunity in the first PRACH transmission opportunity group, M2 PRACH transmission opportunities are divided into a second PRACH transmission opportunity group, where M2 is a non-maximum number of PRACH repeated transmissions in the network side configuration.

19. The method according to claim 16, dividing the second PRACH transmission opportunity group comprises: Starting from the first PRACH transmission opportunity in the first PRACH transmission opportunity group, every M2 PRACH transmission opportunities are divided into a second PRACH transmission opportunity group until the number of remaining PRACH transmission opportunities is less than M2, where M2 is the non-maximum number of PRACH repeated transmissions in the network side configuration.

20. The method according to claim 12, wherein dividing into one or more PRACH transmission opportunity groups comprises: When the network side configuration includes multiple PRACH repetition transmission times, starting from the first PRACH transmission opportunity in the time domain within one or more associated pattern periods of the SSB and PRACH transmission opportunities, every M3 PRACH transmission opportunities are divided into a first PRACH transmission opportunity group until the number of remaining PRACH transmission opportunities is less than M3, where M3 is the different PRACH repetition transmission times in the network side configuration.

21. The method according to any one of claims 12 to 20, wherein dividing into one or more PRACH transmission opportunity groups comprises: When the first indicator indicates that PRACH frequency hopping transmission is not enabled, the PRACH transmission timings in the same PRACH transmission timing group are at the same frequency domain position.

22. The method according to any one of claims 12 to 20, wherein dividing into one or more PRACH transmission opportunity groups comprises: When the first indicator indicates to turn on PRACH frequency hopping transmission, the division starts from the first PRACH transmission opportunity in the time domain and frequency domain within one or more associated pattern periods of the SSB and PRACH transmission opportunities, and the network side configuration also includes a first offset value for frequency hopping. According to the first offset value, the corresponding PRACH transmission opportunity is selected and divided into the same PRACH transmission opportunity group.

23. According to the method of claim 22, based on the mapping relationship between SSB and PRACH transmission timing, when the first offset value has a unique value, the first offset value is set by default.

24. The method according to any one of claims 1-23, wherein when the first indicator is set by default, it indicates that PRACH frequency hopping transmission is not enabled.

25. A user equipment, comprising: Memory; as well as A processor coupled to the memory, the processor being configured to execute the method of any one of claims 1-4, 8-24 based on instructions stored in the memory.

26. A user equipment, comprising: A module for executing the method of any one of claims 1-4, 8-24.

27. A network device comprising: Memory; as well as A processor coupled to the memory, the processor being configured to execute the method of any one of claims 5-7 and 8-24 based on instructions stored in the memory.

28. A network device comprising: A module for executing the method of any one of claims 5-7, 8-24.

29. A communication system comprising: The user equipment as claimed in claim 25 or 26, and the network equipment as claimed in claim 27 or 28.

30. A non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method according to any one of claims 1 to 24.

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