CN115315016A - Msg1 transmission resource determination method, terminal and network side equipment - Google Patents

Abstract

The application discloses a method, a terminal and a network side device for determining Msg1 transmission resources, which belong to the technical field of wireless communication, and the method for determining the Msg1 transmission resources comprises the following steps: the terminal determines the sending parameters of the Msg1 of a random access process of Msg3PUSCH repeated transmission, wherein the sending parameters comprise RACH opportunity and a preamble, and the sending parameters meet one of the following conditions: using the same RACH occasion as 4-step RACH, a different preamble; using a different RACH occasion than 4-step RACH; and the terminal sends the Msg1 of the random access process of the repeated transmission of the Msg3PUSCH according to the sending parameters.

Description

Msg1 transmission resource determination method, terminal and network side equipment

technical field

The present application belongs to the technical field of wireless communication, and specifically relates to a method for determining Msg1 transmission resources, a terminal and a network side device.

Background technique

In the Rel-15/16 new radio (New Radio, NR) system, the transmission of message 3 (Msg3) in the random access procedure is defined as a single transmission. Since the terminal can only transmit according to the Synchronization Signal and PBCH block (SSB) beam during the initial access phase, but the SSB beam is a cell-level beam, and the SSB beam gain is smaller than the user-level beam gain. As a result, the coverage performance of the Msg3 physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) is relatively poor compared with other channels, which affects the success rate of random access. Especially for users at the edge of a cell or users in a coverage hole area, the performance bottleneck of the Msg3 PUSCH will seriously affect the success rate of accessing the cell for such users. The Rel-17 NR system supports Msg3 PUSCH repetition (repetition) transmission to improve the random access success rate of such users.

The random access procedure supporting the repeated transmission of the Msg3 PUSCH needs to follow the existing sending procedure of the Msg1 to minimize the impact on the Msg1. In addition, the Rel-16 NR system also defines a 2-step (2-step) random access channel (RandomAccess Channel, RACH) process, and the corresponding MsgA physical random access channel (Physical RandomAccess Channel, PRACH) configuration scheme; in addition, Other small data transmission (Small Data Transmission, SDT) under discussion in the Rel-17 NR system also needs to occupy a part of PRACH resources to implement the SDT request. Therefore, how to allocate limited PRACH resources to multiple features or functions supported by the terminal (4-step RACH, 2-step RACH, SDT, MsgA PUSCH repetition request) is a technical problem that needs to be solved.

Contents of the invention

The embodiment of the present application provides a method for determining Msg1 transmission resources, a terminal and a network side device, which can solve the problem of how to allocate limited PRACH resources to multiple features or functions supported by the terminal.

In the first aspect, a method for determining Msg1 transmission resources is provided, including:

The terminal determines the sending parameters of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, wherein the sending parameters include RACH opportunity and preamble, and the sending parameters meet one of the following conditions:

Use the same RACH timing as 4-step RACH, but different preambles;

Use RACH timing different from 4-step RACH;

The terminal sends Msg1 of the random access procedure of Msg3 PUSCH repeated transmission according to the sending parameters.

In the second aspect, a method for determining Msg1 transmission resources is provided, including:

The network side device receives the Msg1 sent by the terminal;

If the sending parameters of the Msg1 meet one of the following conditions, the network side device determines that the Msg1 is the Msg1 of the random access procedure of the Msg3PUSCH repeated transmission:

Use the same RACH timing as 4-step RACH, but different preambles;

Use RACH timing different from 4-step RACH.

In a third aspect, a device for determining Msg1 transmission resources is provided, including:

A determining module, configured to determine the sending parameters of Msg1 of the random access procedure of Msg3 PUSCH repeated transmission, wherein the sending parameters include RACH opportunity and preamble, and the sending parameters meet one of the following conditions:

Use the same RACH timing as 4-step RACH, but different preambles;

Use RACH timing different from 4-step RACH;

The sending module is configured to send Msg1 of the random access procedure of Msg3 PUSCH repeated transmission according to the sending parameters.

In the fourth aspect, a device for determining Msg1 transmission resources is provided, including:

The receiving module is used to receive the Msg1 sent by the terminal;

A determination module, configured to determine that the Msg1 is the Msg1 of the random access procedure for Msg3PUSCH repeated transmission if the sending parameters of the Msg1 meet one of the following conditions:

Use the same RACH timing as 4-step RACH, but different preambles;

Use RACH timing different from 4-step RACH.

According to a fifth aspect, a terminal is provided. The terminal includes a processor, a memory, and a program or instruction stored in the memory and operable on the processor. When the program or instruction is executed by the processor The steps of the method described in the first aspect are realized.

In a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein:

The processor is used to determine the sending parameters of Msg1 of the random access procedure of Msg3 PUSCH repeated transmission, wherein the sending parameters include RACH opportunity and preamble, and the sending parameters meet one of the following conditions:

Use the same RACH timing as 4-step RACH, but different preambles;

Use RACH timing different from 4-step RACH;

The communication interface is used to send the Msg1 of the random access procedure of the Msg3 PUSCH repeated transmission according to the sending parameters.

According to the seventh aspect, a network-side device is provided, the network-side device includes a processor, a memory, and a program or instruction stored in the memory and operable on the processor, and the program or instruction is executed by the The processor implements the steps of the method described in the second aspect when executed.

In an eighth aspect, a network side device is provided, including a processor and a communication interface, wherein:

The communication interface is used to receive the Msg1 sent by the terminal;

The processor is configured to determine that the Msg1 is the Msg1 of the random access procedure for Msg3PUSCH repeated transmission if the sending parameters of the Msg1 meet one of the following conditions:

Use the same RACH timing as 4-step RACH, but different preambles;

Use RACH timing different from 4-step RACH.

In the ninth aspect, a readable storage medium is provided, and programs or instructions are stored on the readable storage medium, and when the programs or instructions are executed by a processor, the steps of the method described in the first aspect are realized, or the steps of the method described in the first aspect are realized, or The steps of the method described in the second aspect.

In a tenth aspect, a chip is provided, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method as described in the first aspect , or implement the method described in the second aspect.

In an eleventh aspect, a computer program/program product is provided, the computer program/program product is stored in a non-volatile storage medium, and the program/program product is executed by at least one processor to implement the first The steps of the method described in the second aspect, or the program/program product is executed by at least one processor to implement the steps of the method described in the second aspect.

In the embodiment of the present application, the method for determining the transmission resource of Msg1 in the random access procedure of the repeated PUSCH transmission of Msg3 is clarified, so as to ensure that the network side equipment and the terminal can accurately determine the usage of the PRACH resource.

Description of drawings

FIG. 1 is a structural diagram of a wireless communication system applicable to an embodiment of the present application;

Figure 2 is a schematic flow diagram of 4-step RACH and 2-step RACH;

FIG. 3 is a schematic diagram of a preamble index set in an RACH opportunity;

FIG. 4 is a schematic flowchart of a method for determining Msg1 transmission resources performed by a terminal according to an embodiment of the present application;

FIG. 5 is a schematic flowchart of a method for determining Msg1 transmission resources performed by a network side device according to an embodiment of the present application;

Figure 6 and Figure 7 are schematic diagrams of the division of preambles when Msg1 and 4-step RACH share RO in the random access process of Msg3 PUSCH repeated transmission;

FIG. 8 is a schematic diagram of division of preambles when Msg1 and 2-step RACH share RO in the random access process of Msg3 PUSCH repeated transmission;

FIG. 9 is a schematic structural diagram of an apparatus for determining Msg1 transmission resources according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of an apparatus for determining Msg1 transmission resources according to another embodiment of the present application;

FIG. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 12 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present application;

FIG. 13 is a schematic diagram of a hardware structure of a network side device according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in this application belong to the protection scope of this application.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein and that "first" and "second" distinguish objects. It is usually one category, and the number of objects is not limited. For example, there may be one or more first objects. In addition, "and/or" in the description and claims means at least one of the connected objects, and the character "/" generally means that the related objects are an "or" relationship.

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

FIG. 1 shows a structural diagram of a wireless communication system to which this embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network side device 12 . Wherein, the terminal 11 can also be called a terminal device or a user terminal (UserEquipment, UE), and the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), handheld computer, netbook, ultra-mobile personal computer (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), wearable device (Wearable Device) or vehicle-mounted device ( VUE), Pedestrian Terminal (PUE) and other terminal-side devices, wearable devices include: smart watches, bracelets, earphones, glasses, etc. It should be noted that, the embodiment of the present application does not limit the specific type of the terminal 11 . The network side device 12 may be a base station or a core network, where a base station may be called a node B, an evolved node B, an access point, a base transceiver station (Base TransceiverStation, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), Extended Service Set (ESS), Node B, Evolved Node B (eNB), Home Node B, Home Evolved Node B, WLAN access point, WiFi node, sending and receiving Point (Transmitting Receiving Point, TRP) or some other appropriate term in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiment of this application, only NR The base station in the system is taken as an example, but the specific type of the base station is not limited.

The following briefly describes the random access (or access) process involved in the embodiment of the present application.

(1) Random access process

NR supports two types of random access procedures: 4-step RA type (4-step RACH) of Msg1 and 2-step RA type (2-step RACH) of MSGA. Both types of RA processes support contention based random access (Contention based, CBRA) and contention free random access (Contention free, CFRA), as shown in FIG. 2 . The 2-step RACH process is generally applied to areas with better coverage to shorten the terminal access time. For areas with poor signal coverage, the terminal should use the 4-step RACH process to access the cell.

1) 4-step RACH process

In 4-step RACH, the terminal (UE) first sends Msg1 to the network side (base station), and Msg1 contains the Random Access preamble (Random Access preamble); , RAR) time window (RA Response window) to monitor the physical downlink control channel (PhysicalDownlink Control Channel, PDCCH), use the fallback (fallback) downlink control information (Downlink ControlInformation, DCI) format (that is, DCI format 1_0) to receive random access RNTI (Random Access RNTI, RA-RNTI) scrambled PDCCH scheduled RAR. If the preamble index in the RAR is the same as the preamble index sent by the UE, it is considered that the RAR has been successfully received, and at this time, the UE can stop monitoring the RAR and send Msg3 according to the indication of the grant carried in the RAR; Msg3 is transmitted on the uplink shared channel (Uplink Shared Channel, UL-SCH), and uses hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ), scrambles PDCCH with RA-RNTI indicated by RAR, and uses fallback DCI format (that is, DCI format 1_0) to schedule the retransmission of Msg3. An important information needs to be included in Msg3: a unique identifier for each UE. This flag will be used for conflict resolution in step four. After receiving Msg3, the network side will use the RA-RNTI scrambled PDCCH to schedule Msg4. When the UE successfully decodes the UE conflict resolution identity (Contention Resolution Identity) contained in Msg4, the MAC control element (Control Element, CE) and Msg3 send When the UE Contention Resolution Identity matches, the UE will consider the random access successful and set its Cell Radio Network Temporary Identifier (C-RNTI) to RA-RNTI, that is, complete the 4-step random access.

2) PRACH resource division/multiplexing rules for 4-step RACH and 2-step RACH

个前导码。对于SSB j(第j个SSB)，前导码的划分规则是：按照前导码编号，连续的

至

关联于SSB j。其中前R个前导码为4-step RACH基于竞争的随机接入(Contention-basedRandom Access，CBRA)，之后的Q个前导码为2-step RACH CBRA，最后的

个前导码为非竞争随机接入(Contention Free Random Access，CFRA)。Please refer to Figure 3. In the case of 4-step RACH and 2-step RACH sharing RACH opportunity (RO), one RO is associated with M SSBs (M is configured by higher layers), including

preamble. For SSB j (the jth SSB), the division rule of the preamble is: according to the preamble number, the consecutive

to

Associated with SSB j. Among them, the first R preambles are 4-step RACH contention-based random access (Contention-based Random Access, CBRA), the next Q preambles are 2-step RACH CBRA, and the last

The first preamble is non-contention random access (Contention Free Random Access, CFRA).

3) RA-RNTI calculation rules

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

Among them, s_id represents the first Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol number of PRACH, t_id represents the first time slot number of PRACH, f_id is the frequency domain number of PRACH, ul_carrier_id represents the uplink carrier Type (0 is normal uplink (Normal Uplink, NUL), 1 is supplementary uplink (Supplementary Uplink, SUL)).

4) MSGB-RNTI calculation rules

MSGB-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2

Among them, s_id represents the first OFDM symbol number of PRACH, t_id represents the first time slot number of PRACH, f_id is the frequency domain number of PRACH, and ul_carrier_id represents the type of uplink carrier (0 is NUL, 1 is SUL).

5) Definition and value of Radio Network Tempory Identity (RNTI)

Please refer to Table 1. The value range of RNTI is 0-65535. The value range of RA-RNTI is 0-17919. The value range of MSGB-RNTI is 17920 to 35839.

Table 1

6) 2-step RACH mask (Mask) purpose

Please refer to Table 2 to limit the available RO transmission set for 2-step RACH transmission through msgA-SSB-SharedRO-MaskIndex.

Table 2

The PRACH resource configuration method of 4-step RACH and 2-step RACH is defined in the Rel15/16 protocol. For the new functions/features in Rel17 (random access procedure for Msg3 PUSCH repeated transmission, RedCap terminal, SDT) it is necessary to configure corresponding PRACH resources on the basis of existing PRACH resource configuration.

The method for determining the Msg1 transmission resource provided by the embodiment of the present application, the terminal and the network side device will be described in detail below through some embodiments and application scenarios with reference to the accompanying drawings.

Please refer to FIG. 4. FIG. 4 is a schematic flowchart of a method for determining Msg1 transmission resources according to an embodiment of the present application. The method includes:

Step 41: The terminal determines the sending parameters of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, wherein the sending parameters include RACH opportunity and preamble, and the sending parameters meet one of the following conditions:

Use the same RACH timing as 4-step RACH, but different preambles;

Use RACH timing different from 4-step RACH;

Step 42: The terminal sends Msg1 of the random access procedure of Msg3 PUSCH repeated transmission according to the sending parameters.

In the embodiment of the present application, the preamble is configured by the network side.

In the embodiment of the present application, the method for determining the transmission resource of Msg1 in the random access procedure of the repeated PUSCH transmission of Msg3 is clarified, so as to ensure that the network side equipment and the terminal can accurately determine the usage of the PRACH resource.

In this embodiment of the present application, optionally, using an RACH timing different from the 4-step RACH includes one of the following:

Use the same RACH timing as 2-step RACH, and a different preamble from 2-step RACH, where 2-step RACH and 4-step RACH use different RACH timing;

Using independently configured RACH timings, wherein the independently configured RACH timings are different from 2-step RACH and 4-step RACH timings.

In this embodiment of the present application, optionally, the independently configured RACH opportunity includes one of the following:

The configured independent RACH timing and 4-step RACH RACH timing adopt frequency domain multiplexing;

The independent RACH opportunity and the 4-step RACH RACH opportunity adopt time domain multiplexing.

In this embodiment of the present application, optionally, if Msg1 in the random access procedure of repeated Msg3 PUSCH transmission uses the same RACH opportunity as that of 4-step RACH, the preamble of Msg1 in the random access procedure of repeated Msg3 PUSCH transmission is in After the CBRA preamble of Msg1 of 4-step RACH.

In this embodiment of the present application, optionally, if Msg1 in the random access procedure of repeated Msg3 PUSCH transmission uses the same RACH opportunity as that of 2-step RACH, the preamble of Msg1 in the random access procedure of repeated Msg3 PUSCH transmission is in After the CBRA preamble of 2-step RACH.

In this embodiment of the present application, optionally, the terminal determines that the sending parameters of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission include:

The terminal determines the first preamble index set of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission;

The terminal randomly selects a preamble from the first preamble index set as the preamble of Msg1 in the random access procedure of repeated Msg3 PUSCH transmission.

In this embodiment of the present application, optionally, the terminal determines the first preamble index set of Msg1 used for the random access procedure of Msg3 PUSCH repeated transmission includes:

The terminal determines each PRACH function included in the first RACH opportunity of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission;

The terminal determines the start index of the preamble of each PRACH function (also referred to as a characteristic);

0≤i≤K-1，0≤k≤K-1，0≤j≤M-1，其中，

为所述第一RACH时机包含的前导码的数量，所述第一RACH时机上包含K个PRACH功能，N_k为第k个PRACH功能对应的前导码的数量。Wherein, the first RACH opportunity is associated with M SSBs, and the start index of the preamble of the i-th PRACH function in the preamble index set of the j-th SSB associated with the first RACH opportunity is:

0≤i≤K-1, 0≤k≤K-1, 0≤j≤M-1, where,

is the number of preambles included in the first RACH opportunity, the first RACH opportunity includes K PRACH functions, and N _k is the number of preambles corresponding to the kth PRACH function.

In the embodiment of the present application, the division rules of PRACH resources are defined to ensure that different PRACH functions can share PRACH resources.

由网络侧配置或协议预定义。进一步可选的，可以由网络侧通过高层信令配置。In the embodiment of this application, optionally, M, K, N _k and

It is configured by the network side or predefined by the protocol. Further optionally, it may be configured by the network side through high-layer signaling.

In this embodiment of the present application, optionally, the PRACH function includes at least one of the following:

Contention-based random access 4-step RACH that does not contain Msg3 PUSCH repeated transmission;

2-step RACH based on contention-based random access;

4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH;

Indication of a redcap (reduced capability) UE based on contention-based random access;

Contention-based random access for small data transfers;

Based on non-contention random access.

In the embodiment of the present application, if the network side configures the corresponding PRACH function parameters for the terminal, it is considered that the terminal supports the corresponding PRACH function.

Optionally, the mapping order of the K PRACH functions included in the first RACH opportunity is predefined by a protocol or configured by a system message.

In this embodiment of the present application, optionally, the index of the preamble of the PRACH function is arranged in the following order from small to large:

Contention-based random access 4-step RACH that does not contain Msg3 PUSCH repeated transmission;

2-step RACH based on contention-based random access;

4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH;

Indication of contention-based random access for reduced-capability terminals;

Contention-based random access for small data transfers;

Based on non-contention random access.

In this embodiment of the application, optionally, at least one of the following PRACH functions is transmitted using the same RACH opportunity as 2-step-RACH:

2-step RACH based on contention-based random access;

4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH;

Indication of contention-based random access for reduced-capability terminals;

Small data transfers with contention-based random access.

In this embodiment of the application, optionally, at least one of the following PRACH functions is transmitted using an independently configured RACH opportunity:

4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH;

Indication of contention-based random access for reduced-capability terminals;

Small data transfers with contention-based random access.

其中，

S为Msg3 PUSCH重复传输的随机接入流程的Msg1的CBRA前导码的数量，R是与所述第一RACH时机关联的每个SSB上的4-step RACH的Msg1的CBRA前导码的数量。Msg3 PUSCH重复传输的随机接入流程的Msg1使用与4step RACH时机相同的SSB映射配置。In this embodiment of the application, optionally, if Msg1 of the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH timing as 4-step RACH, and 2-step RACH is not configured or 2-step RACH uses the same RACH timing as 4-step RACH For different RACH opportunities of RACH, the starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of Msg3 PUSCH of the jth SSB associated with the first RACH opportunity is:

in,

S is the number of CBRA preambles of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and R is the number of CBRA preambles of Msg1 in the 4-step RACH on each SSB associated with the first RACH opportunity. The Msg1 of the random access procedure of the Msg3 PUSCH repeated transmission uses the same SSB mapping configuration as the 4step RACH timing.

In this embodiment of the present application, optionally, if Msg1 of the random access procedure for repeated transmission of Msg3 PUSCH uses the same RACH timing as 4-step RACH, and 2-step RACH is configured, the first RACH timing associated The starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of Msg3 PUSCH of the j-th SSB satisfies one of the following conditions:

其中，

If the first RACH opportunity supports the random access process of 4-step RACH, 2-step RACH and Msg3PUSCH repeated transmission at the same time, the random access procedure of the j-th SSB associated with the first RACH opportunity for Msg3 PUSCH repeated transmission The starting index of the CBRA preamble of Msg1 of the process is:

in,

其中，

If the network side indicates that the first RACH opportunity is used as a 2-step RACH through high-level signaling, the complementary mask corresponding to the mask configured by the 2-step RACH is used as the mask of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission , or obtain the mask of Msg1 in the random access process of Msg3 PUSCH repeated transmission according to the predefined rules of the protocol, or obtain the mask of Msg1 in the random access process of Msg3 PUSCH repeated transmission according to the mask offset rule configured by the system, that is, Msg3 PUSCH There is an offset between the mask of Msg1 of the random access procedure of repeated transmission and the mask configured by 2-step RACH, and the random access procedure of repeated transmission of Msg3 PUSCH of the jth SSB associated with the first RACH opportunity The start index of the CBRA preamble of Msg1 is:

in,

若第一RACH时机只支持Msg3PUSCH重复传输的随机接入流程，与所述第一RACH时机关联的第j个SSB的Msg3 PUSCH重复传输的随机接入流程的Msg1的CBRA前导码的起始索引为：

If the Msg1 of the random access procedure of 2-step RACH and Msg3 PUSCH repeated transmission is configured with a mask, and the first RACH opportunity supports the random access procedure of 2-step RACH and Msg3 PUSCH repeated transmission at the same time, and the first The starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of Msg3 PUSCH of the jth SSB associated with the RACH opportunity is:

If the first RACH opportunity only supports the random access procedure of repeated transmission of Msg3 PUSCH, the start index of the CBRA preamble of Msg1 of the random access procedure of the jth SSB associated with the first RACH opportunity of repeated transmission of Msg3 PUSCH is :

Among them, S is the number of CBRA preambles of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and R is the number of CBRA preambles of Msg1 on each SSB of the 4-step RACH associated with the first RACH opportunity , Q is the number of CBRA preambles of the 2-step RACH on each SSB associated with the first RACH opportunity.

In this embodiment of the present application, optionally, the terminal determines that the sending parameters of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission include at least one of the following:

If the second RACH opportunity requires supporting Msg1 of the random access procedure of 4-step RACH, 2-step RACH and Msg3 PUSCH repeated transmission at the same time, it is considered that the second RACH opportunity is Msg1 of the random access procedure of Msg3 PUSCH repeated transmission unavailable;

则认为所述第二RACH时机对Msg3PUSCH重复传输的随机接入流程的Msg1不可用。If the second RACH opportunity is required to support 4-step RACH, 2-step RACH, Msg1 of the random access procedure of repeated transmission of Msg3 PUSCH, and the random access procedure of 4-step RACH, 2-step RACH, and Msg3 PUSCH repeated transmission The sum of preambles configured for Msg1 exceeds the maximum number of preambles

Then it is considered that the second RACH opportunity is not available for Msg1 of the random access procedure of Msg3 PUSCH repeated transmission.

则认为所述第二RACH时机能够作为所述第一RACH时机用于Msg3 PUSCH重复传输的随机接入流程的Msg1，所述第二RACH时机对Msg3 PUSCH重复传输的随机接入流程的Msg1的起始位置为

数量为

其中，R是与所述第二RACH时机关联的每个SSB上的4-step RACH的Msg1的CBRA前导码的数量，Q为与所述第二RACH时机关联的每个SSB上的2-step RACH的CBRA前导码的数量。If the second RACH opportunity is required to support 4-step RACH, 2-step RACH, Msg1 of the random access procedure of repeated transmission of Msg3 PUSCH, and the random access procedure of 4-step RACH, 2-step RACH, and Msg3 PUSCH repeated transmission The sum of preambles configured for Msg1 exceeds the maximum number of preambles

Then it is considered that the second RACH opportunity can be used as the first RACH opportunity for Msg1 of the random access procedure of Msg3 PUSCH repeated transmission, and the second RACH opportunity is the start of Msg1 of the random access procedure of Msg3 PUSCH repeated transmission starting position is

Quantity is

Wherein, R is the number of CBRA preambles of Msg1 of 4-step RACH on each SSB associated with the second RACH opportunity, and Q is the 2-step on each SSB associated with the second RACH opportunity Number of CBRA preambles for RACH.

其中，Q为与所述第一RACH时机关联的每个SSB上的2-step RACH的CBRA前导码的数量。Msg3 PUSCH重复传输的随机接入流程的Msg1使用与2-step RACH时机相同的SSB映射配置。In this embodiment of the present application, optionally, if Msg1 of the random access procedure of repeated transmission of Msg3 PUSCH uses the same RACH timing as that of 2-step RACH, the Msg3 PUSCH of the jth SSB associated with the first RACH timing is repeated The starting sequence index of the CBRA preamble of Msg1 in the transmitted random access procedure is:

Wherein, Q is the number of CBRA preambles of the 2-step RACH on each SSB associated with the first RACH opportunity. The Msg1 of the random access procedure of the Msg3 PUSCH repeated transmission uses the same SSB mapping configuration as the 2-step RACH timing.

In this embodiment of the present application, optionally, if Msg1 of the random access procedure of repeated transmission of Msg3 PUSCH uses the same RACH timing as that of 2-step RACH, the Msg3 PUSCH of the jth SSB associated with the first RACH timing is repeated The start index of the CBRA preamble of Msg1 in the transmitted random access procedure satisfies one of the following conditions:

If the 2-step RACH is configured with a mask, the complementary mask corresponding to the mask configured by the 2-step RACH is used as the mask of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and the first RACH opportunity associated The starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of Msg3 PUSCH of the j-th SSB is:

其中，

若第一RACH时机只支持Msg3 PUSCH重复传输的随机接入流程，与所述第一RACH时机关联的第j个SSB的Msg3PUSCH重复传输的随机接入流程的Msg1的CBRA前导码的起始索引为：

If the Msg1 of the random access procedure of repeated transmission of 2-step RACH and Msg3 PUSCH is configured with a mask, and the first RACH opportunity supports the Msg1 of the random access procedure of repeated transmission of 2-step RACH and Msg3 PUSCH at the same time, and the above The start index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of the Msg3 PUSCH of the jth SSB associated with the first RACH opportunity is:

in,

If the first RACH opportunity only supports the random access procedure of repeated transmission of Msg3 PUSCH, the start index of the CBRA preamble of Msg1 of the random access procedure of the jth SSB associated with the first RACH opportunity of repeated transmission of Msg3 PUSCH is :

Wherein, S is the number of CBRA preambles of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and Q is the number of CBRA preambles of 2-step RACH on each SSB associated with the first RACH opportunity.

If the Msg1 of the random access process of Msg3 PUSCH repeated transmission uses an independently configured RACH opportunity, the configured independent RACH opportunity and the 4-step RACH RACH opportunity adopt frequency domain multiplexing, and the usage is the same as the 4-step RACH opportunity The SSB mapping configuration;

The independently configured RACH timing and the RACH timing of the 4-step RACH are multiplexed in the time domain, using independently configured SSB mapping configurations.

In this embodiment of the present application, optionally, the terminal sends Msg3 according to the sending parameter, after Msg1 of the random access procedure of PUSCH repeated transmission, further includes:

Listening to Msg2, wherein the terminal judges whether the received Msg2 is the Msg2 corresponding to the Msg1 repeatedly transmitted by the Msg3 PUSCH according to the RNTI and/or the random access preamble identifier RAPID included in the received Msg2.

In this embodiment of the present application, optionally, if Msg1 of the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH timing as 4-step RACH, the terminal judges according to the RNTI and/or the RAPID contained in the received Msg2 Whether the received Msg2 is Msg3 The Msg2 corresponding to the Msg1 of the PUSCH repeated transmission includes:

The terminal calculates the RNTI according to the 4-step RACH RA-RNTI calculation method, and uses RAPID to judge whether the received Msg2 is the Msg2 corresponding to the Msg1 of the Msg3 PUSCH repeated transmission;

The terminal calculates the RNTI according to the MSGB-RNTI calculation method of 2-step RACH, and uses RAPID to determine whether the received Msg2 is the Msg2 corresponding to the Msg1 of the Msg3 PUSCH repeated transmission;

The terminal calculates the RNTI according to a special calculation method, which is different from the calculation methods of the RA-RNTI and the MSGB-RNTI.

Among them, the RA-RNTI calculation method of 4-step RACH is:

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

Among them, s_id represents the first OFDM symbol number of PRACH, t_id represents the first time slot number of PRACH, f_id is the frequency domain number of PRACH, and ul_carrier_id represents the type of uplink carrier (0 is NUL, 1 is SUL).

The MSGB-RNTI calculation method of 2-step RACH is:

MSGB-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2.

In this embodiment of the present application, optionally, if Msg1 in the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH opportunity as 2-step RACH, the terminal judges according to the RNTI and/or the RAPID contained in the received Msg2 Whether the received Msg2 is Msg3 The Msg2 corresponding to the Msg1 of the PUSCH repeated transmission includes:

The terminal calculates the RNTI according to the MSGB-RNTI calculation method of 2-step RACH, and uses RAPID to determine whether the received Msg2 is the Msg2 corresponding to the Msg1 of the Msg3 PUSCH repeated transmission;

The terminal calculates the RNTI according to a special calculation method, which is different from the calculation methods of the RA-RNTI and the MSGB-RNTI.

In this embodiment of the application, optionally, the dedicated calculation method is:

RNTI=1+s_id1+14×t_id1+14×80×f_id1+14×80×8×ul_carrier_id;

or

RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×4;

Among them, s_id1=mod(s_id+Δ1,14), t_id1=mod(t_id+Δ2,80), f_id1=mod(f_id+Δ3,8), Δ1, Δ2, Δ3 are integers greater than or equal to zero, configured by the network side (such as configured through system messages) or pre-defined by the protocol, s_id indicates the first OFDM symbol number of the PRACH, t_id indicates the first time slot number of the PRACH, f_id is the frequency domain number of the PRACH, ul_carrier_id Indicates the type of uplink carrier.

Optionally, the calculation method of the RNTI in the random access procedure of the repeated Msg3 PUSCH transmission may be determined according to the multiplexing relationship between Msg1 and the 4step RACH opportunity or 2step RACH opportunity in the random access procedure of the Msg3PUSCH repeated transmission. For example, Msg1 of the random access procedure of repeated Msg3 PUSCH transmission is multiplexed with 4-step RACH timing, and the RNTI is calculated according to the calculation method of RA-RNTI; if Msg1 of the random access procedure of Msg3 PUSCH repeated transmission The opportunity is multiplexed, and the RNTI is calculated according to the calculation method of MSGB-RNTI; if the Msg1 of the random access procedure of the Msg3PUSCH repeated transmission uses an independent RACH opportunity, the RNTI is calculated using a dedicated calculation method.

Optionally, in this embodiment of the present application, if the system supports multiple configurations of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission (such as sharing RO mode with 4-step RACH, sharing RO mode with 2-step RACH, or independent RO mode), the system can define a unified RNTI calculation method to ensure the calculation of RNTI in different configuration modes, reducing the computational complexity of network devices and terminal devices.

Further optionally, the terminal device may respectively use the dedicated RNTI and the RA-RNTI to detect and schedule the DCIformat 1-0 of the Msg2. If the terminal successfully detects the dedicated RNTI scrambled DCI format 1-0 and the RAPID check passes, then use the Msg3 PUSCH repeated transmission scheduling information format to parse the RAR UL grant, for example, use the Msg3 PUSCH repeated transmission dedicated TDRA table, or other The data set predefined by the protocol or configured by the system message is used to parse the information on the corresponding field of the RAR UL grant. If the terminal successfully detects the DCI format 1-0 of the RA-RNTI scrambling detection schedule Msg2 and the RAPID check passes, then use the RAR UL grant format defined in Rel-15/16 to parse the RAR UL grant.

Please refer to FIG. 5, the embodiment of the present application also provides a method for determining Msg1 transmission resources, including:

Step 51: The network side device receives the Msg1 sent by the terminal;

Step 52: If the sending parameters of the Msg1 meet one of the following conditions, the network side device determines that the Msg1 is the Msg1 of the random access procedure of the Msg3 PUSCH repeated transmission:

Use the same RACH timing as 4-step RACH, but different preambles;

Use different RACH timings and different preambles from 4-step RACH.

Optionally, using an RACH timing different from the 4-step RACH includes one of the following:

Use the same RACH timing as 2-step RACH, but different preambles, where 2-step RACH and 4-step RACH use different RACH timing;

Using independently configured RACH timings, wherein the independently configured RACH timings are different from 2-step RACH and 4-step RACH timings.

Optionally, the RACH timing using independent configuration includes one of the following:

The configured independent RACH timing and 4-step RACH RACH timing adopt frequency domain multiplexing;

The independent RACH opportunity and the 4-step RACH RACH opportunity adopt time domain multiplexing.

Optionally, the method also includes:

其中，M为一个RACH时机关联的SSB的数量，K为一个RACH时机上包含的PRACH功能的数量，N_k为第k个PRACH功能对应的前导码的数量，

为一个RACH时机包含的前导码的数量。The network side device configures M, K, N _k and/or

Wherein, M is the number of SSBs associated with one RACH opportunity, K is the number of PRACH functions included in one RACH opportunity, N _k is the number of preambles corresponding to the kth PRACH function,

It is the number of preambles included in one RACH opportunity.

Optionally, the PRACH function includes at least one of the following:

Contention-based random access 4-step RACH that does not contain Msg3 PUSCH repeated transmission;

2-step RACH based on contention-based random access;

4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH;

Indication of contention-based random access for reduced-capability terminals;

Contention-based random access for small data transfers;

Based on non-contention random access.

Optionally, the method of the embodiment of the present application also includes one of the following:

The network side device calculates the RNTI according to the 4-step RACH RA-RNTI calculation method;

The network side device calculates the RNTI according to the MSGB-RNTI calculation method of 2-step RACH;

The network side device calculates the RNTI according to a dedicated calculation method, which is different from the calculation methods of the RA-RNTI and the MSGB-RNTI.

Optionally, the special calculation method is:

RNTI=1+s_id1+14×t_id1+14×80×f_id1+14×80×8×ul_carrier_id;

or

RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×4;

Among them, s_id1=mod(s_id+Δ1,14), t_id1=mod(t_id+Δ2,80), f_id1=mod(f_id+Δ3,8), Δ1, Δ2, Δ3 are integers greater than or equal to zero, configured by the network side Or the protocol is predefined, s_id indicates the first OFDM symbol number of the PRACH, t_id indicates the first time slot number of the PRACH, f_id is the frequency domain number of the PRACH, and ul_carrier_id indicates the type of the uplink carrier.

The method for determining the Msg1 transmission resource in the above-mentioned embodiment will be illustrated below in combination with specific scenarios.

Embodiment 1 of this application:

In the embodiment of the present application, Msg1 of the random access procedure of Msg3 PUSCH repeated transmission and Msg1 of the 4-step RACH procedure share the RACH opportunity, and the preamble of Msg1 of the random access procedure of Msg3 PUSCH repeated transmission and the Msg1 of 4-step RACH The preamble is different.

In the embodiment of the present application, the terminal determines the sending parameters of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and the sending parameters meet the following conditions:

Msg1 in the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH opportunity (RO, RACH Occasion) as 4-step RACH, which can also be described as: The determination rules of the time-frequency resource of the RACH occasion of Msg1 are the same.

The preamble of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission is after the CBRA preamble of Msg1 in 4-step RACH.

个前导码相关联。According to the system message configuration, if 4-step RACH is supported, one RO is associated with M SSBs, and each SSB has R 4-step RACH CBRA preambles. If 2-step RACH is supported, one RO is associated with M SSBs, and each SSB has Q 2-step RACH CBRA preambles. a RO with

associated with a preamble.

The number of CBRA preambles of Msg1 in the random access process of Msg3 PUSCH repeated transmission is S, which is configured by the system message. Msg1 in the random access process of Msg3 PUSCH repeated transmission uses the same SSB mapping configuration as the 4-step RACH timing.

0≤j≤M-1，网络侧配置保证

If the cell does not configure 2-step RACH or 2-step RACH uses an independent RO configuration, the random access of the Msg3 PUSCH repeated transmission of the jth SSB associated with the RO (the RO of Msg1 in the random access procedure of the Msg3PUSCH repeated transmission random access procedure) The starting sequence index of the CBRA preamble of Msg1 of the process is:

0≤j≤M-1, network side configuration guarantee

If the cell is configured with 4-step RACH and 2-step RACH sharing RO at the same time, there are the following configuration rules:

0≤j≤M-1，网络侧配置保证

If an RO supports 4-step RACH, 2-step RACH and Msg1 of Msg3 PUSCH repeated transmission at the same time, then the Msg3PUSCH repeated transmission of the jth SSB associated with the RO (the RO of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission) The starting index of the CBRA preamble of Msg1 in the random access procedure is:

0≤j≤M-1, network side configuration guarantee

0≤n≤M-1，网络侧配置保证

Special case Case1: If the network configuration indicates that a part of the RO (RO of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission) is used as 2-step RACH through high-layer signaling (such as xxxMask), and the mask configured by 2-step RACH The complementary mask corresponding to the code (mask) is used as the mask of Msg1 in the random access procedure of Msg3PUSCH repeated transmission, or the Msg3PUSCH is obtained by offsetting the mask of several ROs according to the predefined rules of the protocol or the system configuration and the mask of the 2-step RACH configuration The mask of Msg1 in the random access procedure of repeated transmission, for example, the mask configured in 2-step RACH is mask1, and the offset is 1, and the mask of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission is mask2. The starting index of the CBRA preamble of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission of the jth SSB associated with the RO (the RO of Msg1 in the random access procedure of the repeated transmission of Msg3 PUSCH) is:

0≤n≤M-1, network side configuration guarantee

0≤n≤M-1。如果一个RO只支持Msg3 PUSCH重复传输，那么与RO关联的第j个SSB的Msg3 PUSCH重复传输的随机接入流程的Msg1的CBRA前导码的起始索引为：

0≤n≤M-1。Special Case 2: If Msg1 of the random access process of 2-step RACH and Msg3 PUSCH repeated transmission is configured with a mask, and an RO supports 2-step RACH and Msg3 PUSCH repeated transmission at the same time, then the jth SSB associated with the RO The starting index of the CBRA preamble of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission is:

0≤n≤M-1. If an RO only supports repeated transmission of Msg3 PUSCH, then the start index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of Msg3 PUSCH of the jth SSB associated with the RO is:

0≤n≤M-1.

Optionally, through the pre-defined rules of the protocol, when a certain RO is configured according to the mask and Msg1 of the random access procedure that supports 4-step RACH, 2-step RACH, and Msg3 PUSCH repeated transmission is required, the RO is considered to repeatedly transmit Msg3 PUSCH Msg1 of the random access procedure is not available, that is, the RO does not support Msg1 of the random access procedure of Msg3 PUSCH repeated transmission.

时，按照协议预定义规则，认为所述RO对Msg3 PUSCH重复传输的随机接入流程的Msg1不可用，即所述RO不支持Msg3 PUSCH重复传输的随机接入流程的Msg1。Optionally, through the pre-defined rules of the protocol, when a certain RO is required to support 4-step RACH, 2-step RACH, and Msg1 of the random access procedure for repeated transmission of Msg3 PUSCH, and the sum of the preambles configured by the three exceeds the system-defined Maximum number of preambles

, according to the protocol predefined rules, it is considered that the RO is not available for Msg1 of the random access procedure of Msg3 PUSCH repeated transmission, that is, the RO does not support Msg1 of the random access procedure of Msg3 PUSCH repeated transmission.

If the cell also supports PRACH division with other characteristics (except 4-step RACH, 2-step RACH and repeated transmission of Msg3PUSCH), the number of CBRA preambles of the PRACH with other characteristics is T.

According to the rules defined by the protocol, the preamble resources are divided in the order of fixed rules. For example, preamble 0~R-1 belongs to 4-step RACH CBRA, preabme R~R+Q-1 belongs to 2-step RACH CBRA, preamble R+Q~R+Q+S-1 belongs to the random access of Msg3 PUSCH repeated transmission The CBRA of the input process, preamble R+Q+S～R+Q+S+T-1 belongs to the CBRA of other features. Please refer to Figure 6 and Figure 7.

The terminal determines the preamble index set corresponding to the repeated transmission of Msg3 according to the above method, randomly selects a preamble in the preamble index set to send Msg1, and starts to monitor Msg2.

The terminal judges whether the received Msg2 is the Msg2 message corresponding to Msg1 in the random access procedure of Msg3 PUSCH repeated transmission according to the random access preamble identity (RAPID) included in the RNTI and/or Msg2.

Optionally, the terminal calculates the RNTI according to the 4-step RACH RA-RNTI calculation method, and uses RAPID to judge whether Msg2 is the Msg2 corresponding to Msg1 in the random access procedure of the Msg3 PUSCH repeated transmission.

The terminal calculates RNTI according to the MSGB-RNTI calculation method of 2-step RACH, and uses RAPID to judge whether Msg2 is Msg2 corresponding to Msg1 in the random access procedure of Msg3 PUSCH repeated transmission. For example, when the 2-step RACH and Msg3PUSCH repeated transmissions do not appear in one RO at the same time, the Msg3 PUSCH repeated transmission terminal uses the 2-step RACH MSGB-RNTI calculation method to calculate the RNTI.

Optionally, the terminal calculates the RNTI according to a newly defined calculation method. For example, RNTI is calculated by adding an offset to the time-frequency number.

A possible implementation is: RNTI=1+s_id1+14×t_id1+14×80×f_id1+14×80×8×ul_carrier_id;

Among them, s_id1=mod(s_id+Δ1,14), t_id1=mod(t_id+Δ2,80), f_id1=mod(f_id+Δ3,8). Δ1, Δ2, Δ3 are integers greater than or equal to zero, and are predefined by system message configuration or protocol.

Another possible implementation manner is: RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×4.

In the embodiment of the present application, if the system supports multiple Msg3 PUSCH repeated transmission random access procedure Msg1 configuration mode (such as sharing RO mode with 4-step RACH, sharing RO mode with 2-step RACH or independent RO mode), The system can define a unified RNTI calculation method to ensure the calculation of RNTI in different configuration modes.

For the Msg2 verified by the RNTI and/or RAPID, the terminal parses the received Msg2 according to the Msg2 format of the Msg3PUSCH repeated transmission defined by the protocol, and transmits the Msg3.

Embodiment 2 of this application:

In the embodiment of the present application, Msg1 in the random access procedure of repeated transmission of Msg3 PUSCH uses the way of sharing RO with 2-step RACH. At this time, 2-step RACH adopts independent RO configuration (different from RO of 4-step RACH). The Msg1 of the random access procedure of the Msg3PUSCH repeated transmission uses the same SSB mapping configuration as the 2-step RACH.

The terminal determines the sending parameters of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and the sending parameters meet the following conditions:

Msg1 of the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH timing as that of 2-step RACH, which can also be described as: the RACH timing of Msg1 of the random access procedure of Msg3 PUSCH repeated transmission is determined by the RACH timing of Msg1 of 2step RACH The rules are the same.

The CBRA preamble of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission is after the CBRA preamble of 2-step RACH.

个preamble相关联。According to the system message configuration, one RO supporting 2-step RACH is associated with M SSBs, one RO is associated with M SSBs, and each SSB has Q 2-step RACH CBRA preambles. a RO with

associated with a preamble.

The number of CBRA preambles of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission is S, which is configured by a system message.

0≤j≤M-1，网络侧配置保证

The start index of the CBRA preamble of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission of the jth SSB associated with the RO is:

0≤j≤M-1, network side configuration guarantee

For the repeated transmission of 2-step RACH and Msg3 PUSCH configured with Mask:

0≤j≤M-1。Case1: If a mask is configured for 2-step RACH, the complementary mask corresponding to the mask configured for 2-step RACH is used as the mask of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission. The starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of Msg3PUSCH of the jth SSB associated with the RO is:

0≤j≤M-1.

0≤j≤M-1。如果一个RO只支持Msg3 PUSCH重复传输，与RO关联的第j个SSB的Msg3PUSCH重复传输的随机接入流程的Msg1的CBRA前导码的起始索引为：

0≤j≤M-1。Case2: If Msg1 of the random access process of 2-step RACH and Msg3 PUSCH repeated transmission is configured with a mask, and an RO supports 2-step RACH and Msg3 PUSCH repeated transmission process at the same time, Msg3 of the jth SSB associated with the RO The starting index of the CB preamble of Msg1 in the random access procedure of PUSCH repeated transmission is:

0≤j≤M-1. If an RO only supports repeated transmission of Msg3 PUSCH, the starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of Msg3 PUSCH of the jth SSB associated with the RO is:

0≤j≤M-1.

If the cell also supports PRACH division of other features, and also uses the independent RO of 2-step RACH to send Msg1. The number of CBRA preambles of the PRACH with other characteristics is T.

According to the rules defined by the protocol, the preamble resources are divided in the order of the fixed rules. For example, please refer to Figure 8, preabme 0~Q-1 belongs to 2-step RACH CBRA, preamble Q~Q+S-1 belongs to CBRA associated with Msg3 PUSCH repeated transmission, preamble Q+S~Q+S+T-1 CBRAs belonging to other characteristics.

The terminal determines the preamble index set according to the above method, randomly selects the preamble to send Msg1, and starts to monitor Msg2.

The terminal judges whether the received Msg2 is the Msg2 message corresponding to the Msg1 in the random access procedure of the Msg3 PUSCH repeated transmission according to the RNTI and/or the RAPID contained in the Msg2.

Optionally, the terminal calculates the RNTI according to the MSGB-RNTI calculation method of 2-step RACH, and uses RAPID to determine whether Msg2 is the Msg2 corresponding to Msg1 in the random access procedure of Msg3 PUSCH repeated transmission. For example, when the 2-step RACH and Msg3 PUSCH repeated transmissions do not appear in one RO at the same time, the Msg3 PUSCH repeated transmission uses the 2-step RACH MSGB-RNTI calculation method to calculate the RNTI.

The terminal calculates the RNTI according to the newly defined dedicated calculation method. For example, RNTI is calculated by adding an offset to the time-frequency number.

Embodiment 3 of this application:

The system configures an independent RO for sending Msg1 in the random access procedure of Msg3 PUSCH repeated transmission.

Optionally, configure independent ROs in frequency domain multiplexing, that is, configure independent RO frequency start index RO-FrequencyStart (similar to msg1-FrequencyStart or msgA-RO-FrequencyStart) and RO frequency domain multiplexing number FDM ( Similar to msg1-FDM or msgA-RO-FDM). The independent RO is used for Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, using the same SSB mapping configuration as the 4step RACH RO.

Alternatively, the independent ROs are configured in a time-domain multiplexing manner, that is, the offset of the start symbol/slot of the independent ROs relative to the 4-step RACH RO is configured. The independent RO is used for the Msg1 of the random access procedure of the repeated transmission of the Msg3 PUSCH to use an independently configured SSB mapping configuration.

The terminal determines the preamble index set according to the system message configuration, randomly selects the preamble to send Msg1, and starts to monitor Msg2.

The terminal judges whether the received Msg2 is the Msg2 message corresponding to the Msg1 in the random access procedure of the Msg3 PUSCH repeated transmission according to the RNTI and/or the RAPID contained in the Msg2.

The terminal calculates the RNTI according to a newly defined dedicated calculation method, for example, by adding an offset to the time-frequency number to calculate the RNTI.

A possible implementation is given here: RNTI=1+s_id1+14×t_id1+14×80×f_id1+14×80×8×ul_carrier_id;

Among them, s_id1=mod(s_id+Δ1,14), t_id1=mod(t_id+Δ2,80), f_id1=mod(f_id+Δ3,8). Δ1, Δ2, Δ3 are integers greater than or equal to zero, and are predefined by system message configuration or protocol.

Optionally, considering that the number of terminals requiring repeated Msg3 PUSCH transmission accounts for a relatively small number of total terminals, the number of frequency domain multiplexed independent ROs for frequency domain multiplexing should be less than 8. For example, the number of frequency domain multiplexing used for Msg3 PUSCH repeated transmission may be a subset of the configurable set of msg1-FDM or msgA-RO-FDM.

For the Msg2 verified by the RNTI and/or RAPID, the terminal parses the received Msg2 according to the Msg2 format of the Msg3PUSCH repeated transmission defined by the protocol, and transmits the Msg3.

In the above embodiments, the terminal that repeatedly transmits Msg3 PUSCH can determine the RNTI for receiving Msg2 through a dedicated formula, and the value of the dedicated RNTI is different from the results of the RA-RNTI and MSGB-RNTI calculated in Rel-15/16. The terminal can use the dedicated RNTI and RA-RNTI to detect and schedule DCI format 1-0 of Msg2. If the terminal successfully detects the dedicated RNTI scrambled DCI format1-0 and the RAPID check passes, then use the scheduling information format of Msg3 PUSCH repeated transmission to parse the RAR UL grant, for example, use the dedicated TDRA table for Msg3 PUSCH repeated transmission, or other protocols Predefined or system message configuration data set to parse the information on the corresponding field of RAR UL grant. If the terminal successfully detects the DCI format 1-0 of the RA-RNTI detection scheduling Msg2 and the RAPID check passes, it uses the RARUL grant format defined in Rel-15/16 to parse the RAR UL grant.

It should be noted that, in the method for determining Msg1 transmission resources provided in the embodiment of the present application, the execution subject may be the device for determining Msg1 transmission resources, or, the method for determining Msg1 transmission resources in the device for determining Msg1 transmission resources control module. In the embodiment of the present application, the method for determining the Msg1 transmission resource performed by the device for determining the Msg1 transmission resource is taken as an example to illustrate the device for determining the Msg1 transmission resource provided in the embodiment of the present application.

Please refer to FIG. 9 , the embodiment of the present application also provides an apparatus 90 for determining Msg1 transmission resources, including:

The determining module 91 is used to determine the sending parameters of Msg1 of the random access procedure of Msg3 PUSCH repeated transmission, wherein the sending parameters include RACH opportunity and preamble, and the sending parameters meet one of the following conditions:

Use the same RACH timing as 4-step RACH, but different preambles;

Use RACH timing different from 4-step RACH;

The sending module 92 is configured to send Msg1 of the random access procedure of Msg3 PUSCH repeated transmission according to the sending parameters.

Optionally, if Msg1 of the random access procedure of repeated Msg3 PUSCH transmission uses the same RACH opportunity as that of 4-step RACH, the preamble of Msg1 of the random access procedure of Msg3 PUSCH repeated transmission is in Msg1 of 4-step RACH after the CBRA preamble.

Optionally, using an RACH timing different from the 4-step RACH includes one of the following:

Use the same RACH timing as 2-step RACH, but different preambles, where 2-step RACH and 4-step RACH use different RACH timing;

Using independently configured RACH timings, wherein the independently configured RACH timings are different from 2-step RACH and 4-step RACH timings.

Optionally, if Msg1 in the random access procedure of repeated Msg3 PUSCH transmission uses the same RACH opportunity as that of 2-step RACH, the preamble of Msg1 in the random access procedure of repeated Msg3 PUSCH transmission is in the CBRA of 2-step RACH after the preamble.

Optionally, the RACH timing using independent configuration includes one of the following:

The configured independent RACH timing and 4-step RACH RACH timing adopt frequency domain multiplexing;

The independent RACH opportunity and the 4-step RACH RACH opportunity adopt time domain multiplexing.

Optionally, the determination module 91 is configured to determine the first preamble index set of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission; randomly select a preamble from the first preamble index set as the Msg3 PUSCH The preamble of Msg1 in the random access procedure of repeated transmission.

Optionally, the determination module 91 is configured to determine each PRACH function included in the first RACH opportunity of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission; determine the start index of the preamble of each PRACH function;

0≤i≤K-1，0≤k≤K-1，0≤j≤M-1，其中，

为所述第一RACH时机包含的前导码的数量，所述第一RACH时机上包含K个PRACH功能，N_k为第k个PRACH功能对应的前导码的数量。Wherein, the first RACH opportunity is associated with M SSBs, and the start index of the preamble of the i-th PRACH function in the preamble index set of the j-th SSB associated with the first RACH opportunity is:

0≤i≤K-1, 0≤k≤K-1, 0≤j≤M-1, where,

is the number of preambles included in the first RACH opportunity, the first RACH opportunity includes K PRACH functions, and N _k is the number of preambles corresponding to the kth PRACH function.

由网络侧配置或协议预定义。Optionally, M, K, N _k and

It is configured by the network side or predefined by the protocol.

Optionally, the PRACH function includes at least one of the following:

Contention-based random access 4-step RACH that does not contain Msg3 PUSCH repeated transmission;

2-step RACH based on contention-based random access;

4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH;

Indication of contention-based random access for reduced-capability terminals;

Contention-based random access for small data transfers;

Based on non-contention random access.

Optionally, the mapping order of the K PRACH functions included in the first RACH opportunity is predefined by a protocol or configured by a system message.

Optionally, the index of the preamble of the PRACH function is arranged in the following order from small to large:

Contention-based random access 4-step RACH that does not contain Msg3 PUSCH repeated transmission;

2-step RACH based on contention-based random access;

4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH;

Indication of contention-based random access for reduced-capability terminals;

Contention-based random access for small data transfers;

Based on non-contention random access.

Optionally, at least one of the following PRACH functions is transmitted using the same RACH timing as 2-step-RACH:

2-step RACH based on contention-based random access;

4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH;

Indication of contention-based random access for reduced-capability terminals;

Small data transfers with contention-based random access.

Optionally, at least one of the following PRACH functions is transmitted using independently configured RACH occasions:

4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH;

Indication of contention-based random access for reduced-capability terminals;

Small data transfers with contention-based random access.

其中，

S为Msg3 PUSCH重复传输的随机接入流程的Msg1的CBRA前导码的数量，R是与所述第一RACH时机关联的每个SSB上的4-step RACH的Msg1的CBRA前导码的数量。Optionally, if Msg1 in the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH timing as 4-step RACH, and 2-step RACH is not configured or 2-step RACH uses a different RACH timing from 4-step RACH, The start index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of the Msg3 PUSCH of the jth SSB associated with the first RACH opportunity is:

in,

S is the number of CBRA preambles of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and R is the number of CBRA preambles of Msg1 in the 4-step RACH on each SSB associated with the first RACH opportunity.

Optionally, if Msg1 of the random access procedure for repeated Msg3 PUSCH transmission uses the same RACH timing as 4-step RACH, and 2-step RACH is configured, Msg3 of the jth SSB associated with the first RACH timing The start index of the CBRA preamble of Msg1 in the random access procedure of PUSCH repeated transmission meets one of the following conditions:

其中，

If the first RACH opportunity supports the random access process of 4-step RACH, 2-step RACH and Msg3PUSCH repeated transmission at the same time, the random access procedure of the j-th SSB associated with the first RACH opportunity for Msg3 PUSCH repeated transmission The starting index of the CBRA preamble of Msg1 of the process is:

in,

其中，

If the network side indicates that the first RACH opportunity is used as a 2-step RACH through high-level signaling, the complementary mask corresponding to the mask configured by the 2-step RACH is used as the mask of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission , the starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of the Msg3PUSCH of the jth SSB associated with the first RACH opportunity is:

in,

若第一RACH时机只支持Msg3PUSCH重复传输的随机接入流程，与所述第一RACH时机关联的第j个SSB的Msg3 PUSCH重复传输的随机接入流程的Msg1的CBRA前导码的起始索引为：

If the Msg1 of the random access procedure of 2-step RACH and Msg3 PUSCH repeated transmission is configured with a mask, and the first RACH opportunity supports the random access procedure of 2-step RACH and Msg3 PUSCH repeated transmission at the same time, and the first The starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of Msg3 PUSCH of the jth SSB associated with the RACH opportunity is:

If the first RACH opportunity only supports the random access procedure of repeated transmission of Msg3 PUSCH, the start index of the CBRA preamble of Msg1 of the random access procedure of the jth SSB associated with the first RACH opportunity of repeated transmission of Msg3 PUSCH is :

Among them, S is the number of CBRA preambles of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and R is the number of CBRA preambles of Msg1 on each SSB of the 4-step RACH associated with the first RACH opportunity , Q is the number of CBRA preambles of the 2-step RACH on each SSB associated with the first RACH opportunity.

Optionally, the determination module 91 is configured to perform at least one of the following:

If the second RACH opportunity requires supporting Msg1 of the random access procedure of 4-step RACH, 2-step RACH and Msg3PUSCH repeated transmission at the same time, it is considered that the second RACH opportunity is not available for Msg1 of the random access procedure of Msg3 PUSCH repeated transmission use;

则认为所述第二RACH时机对Msg3PUSCH重复传输的随机接入流程的Msg1不可用。If the second RACH opportunity is required to support 4-step RACH, 2-step RACH, Msg1 of the random access process of repeated transmission of Msg3PUSCH, and the random access process of 4-step RACH, 2-step RACH, Msg3 PUSCH repeated transmission The sum of preambles configured by Msg1 exceeds the maximum number of preambles

Then it is considered that the second RACH opportunity is not available for Msg1 of the random access procedure of Msg3 PUSCH repeated transmission.

则认为所述第二RACH时机能够作为所述第一RACH时机用于Msg3 PUSCH重复传输的随机接入流程的Msg1，所述第二RACH时机对Msg3 PUSCH重复传输的随机接入流程的Msg1的起始位置为

数量为

其中，R是与所述第二RACH时机关联的每个SSB上的4-step RACH的Msg1的CBRA前导码的数量，Q为与所述第二RACH时机关联的每个SSB上的2-step RACH的CBRA前导码的数量。If the second RACH opportunity is required to support 4-step RACH, 2-step RACH, Msg1 of the random access process of repeated transmission of Msg3PUSCH, and the random access process of 4-step RACH, 2-step RACH, Msg3 PUSCH repeated transmission The sum of preambles configured by Msg1 exceeds the maximum number of preambles

Then it is considered that the second RACH opportunity can be used as the first RACH opportunity for Msg1 of the random access procedure of Msg3 PUSCH repeated transmission, and the second RACH opportunity is the start of Msg1 of the random access procedure of Msg3 PUSCH repeated transmission starting position is

Quantity is

Wherein, R is the number of CBRA preambles of Msg1 of 4-step RACH on each SSB associated with the second RACH opportunity, and Q is the 2-step on each SSB associated with the second RACH opportunity Number of CBRA preambles for RACH.

其中，Q为与所述第一RACH时机关联的每个SSB上的2-step RACH的CBRA前导码的数量。Optionally, if Msg1 of the random access procedure of repeated Msg3 PUSCH transmission uses the same RACH timing as that of 2-step RACH, the random access procedure of Msg3 PUSCH repeated transmission of the jth SSB associated with the first RACH timing The starting sequence index of the CBRA preamble of Msg1 is:

Wherein, Q is the number of CBRA preambles of the 2-step RACH on each SSB associated with the first RACH opportunity.

Optionally, if Msg1 of the random access procedure of repeated Msg3 PUSCH transmission uses the same RACH timing as that of 2-step RACH, the random access procedure of Msg3 PUSCH repeated transmission of the jth SSB associated with the first RACH timing The start index of the CBRA preamble of Msg1 satisfies one of the following conditions:

If the 2-step RACH is configured with a mask, the complementary mask corresponding to the mask configured by the 2-step RACH is used as the mask of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and the first RACH opportunity associated The starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of Msg3 PUSCH of the j-th SSB is:

其中，

若第一RACH时机只支持Msg3 PUSCH重复传输的随机接入流程，与所述第一RACH时机关联的第j个SSB的Msg3PUSCH重复传输的随机接入流程的Msg1的CBRA前导码的起始索引为：

If the Msg1 of the random access procedure of repeated transmission of 2-step RACH and Msg3 PUSCH is configured with a mask, and the first RACH opportunity supports the Msg1 of the random access procedure of repeated transmission of 2-step RACH and Msg3 PUSCH at the same time, and the above The start index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of the Msg3 PUSCH of the jth SSB associated with the first RACH opportunity is:

in,

If the first RACH opportunity only supports the random access procedure of repeated transmission of Msg3 PUSCH, the start index of the CBRA preamble of Msg1 of the random access procedure of the jth SSB associated with the first RACH opportunity of repeated transmission of Msg3 PUSCH is :

Wherein, S is the number of CBRA preambles of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and Q is the number of CBRA preambles of 2-step RACH on each SSB associated with the first RACH opportunity.

Optionally, the device also includes:

The monitoring module is configured to monitor Msg2, wherein the terminal judges whether the received Msg2 is the Msg2 corresponding to the Msg1 repeatedly transmitted by the Msg3PUSCH according to the RNTI and/or the random access preamble identifier RAPID contained in the received Msg2.

Optionally, if Msg1 in the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH timing as 4-step RACH, judge whether the received Msg2 is Msg3PUSCH repeated transmission according to the RNTI and/or the RAPID included in the received Msg2 Msg2 corresponding to Msg1 includes:

Calculate the RNTI according to the 4-step RACH RA-RNTI calculation method, and use RAPID to determine whether the received Msg2 is the Msg2 corresponding to the Msg1 of the Msg3 PUSCH repeated transmission;

Calculate the RNTI according to the MSGB-RNTI calculation method of 2-step RACH, and use RAPID to judge whether the received Msg2 is the Msg2 corresponding to the Msg1 of the repeated transmission of Msg3 PUSCH;

The RNTI is calculated according to a special calculation method, which is different from the calculation methods of the RA-RNTI and the MSGB-RNTI.

Optionally, if Msg1 in the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH timing as 2-step RACH, judge whether the received Msg2 is Msg3PUSCH repeated transmission according to the RNTI and/or the RAPID included in the received Msg2 Msg2 corresponding to Msg1 includes:

Calculate the RNTI according to the MSGB-RNTI calculation method of 2-step RACH, and use RAPID to judge whether the received Msg2 is the Msg2 corresponding to the Msg1 of the repeated transmission of Msg3 PUSCH;

The RNTI is calculated according to a special calculation method, which is different from the calculation methods of the RA-RNTI and the MSGB-RNTI.

Optionally, the special calculation method is:

RNTI=1+s_id1+14×t_id1+14×80×f_id1+14×80×8×ul_carrier_id;

or

RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×4;

Among them, s_id1=mod(s_id+Δ1,14), t_id1=mod(t_id+Δ2,80), f_id1=mod(f_id+Δ3,8), Δ1, Δ2, Δ3 are integers greater than or equal to zero, configured by the network side Or the protocol is predefined, s_id indicates the first OFDM symbol number of the PRACH, t_id indicates the first time slot number of the PRACH, f_id is the frequency domain number of the PRACH, and ul_carrier_id indicates the type of the uplink carrier.

The device for determining the Msg1 transmission resource in the embodiment of the present application may be a device, a device with an operating system or an electronic device, or a component, an integrated circuit, or a chip in a terminal. The apparatus or electronic equipment may be a mobile terminal or a non-mobile terminal. Exemplarily, the mobile terminal may include, but not limited to, the types of terminals 11 listed above, and the non-mobile terminal may be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television ( television, TV), teller machines or self-service machines, etc., are not specifically limited in this embodiment of the present application.

The device for determining the transmission resources of Msg1 provided in the embodiment of the present application can realize each process realized by the method embodiment in FIG. 4 and achieve the same technical effect. To avoid repetition, details are not repeated here.

Please refer to FIG. 10 , the embodiment of the present application also provides an apparatus 100 for determining Msg1 transmission resources, including:

The receiving module 101 is configured to receive the Msg1 sent by the terminal;

The determining module 102 is configured to determine that the Msg1 is the Msg1 of the random access procedure of the Msg3 PUSCH repeated transmission if the sending parameters of the Msg1 meet one of the following conditions:

Use the same RACH timing as 4-step RACH, but different preambles;

Use RACH timing different from 4-step RACH.

Optionally, using an RACH timing different from the 4-step RACH includes one of the following:

Use the same RACH timing as 2-step RACH, but different preambles, where 2-step RACH and 4-step RACH use different RACH timing;

Using independently configured RACH timings, wherein the independently configured RACH timings are different from 2-step RACH and 4-step RACH timings.

Optionally, the RACH timing using independent configuration includes one of the following:

The configured independent RACH timing and 4-step RACH RACH timing adopt frequency domain multiplexing;

The independent RACH opportunity and the 4-step RACH RACH opportunity adopt time domain multiplexing.

Optionally, the device also includes:

其中，M为一个RACH时机关联的SSB的数量，K为一个RACH时机上包含的PRACH功能的数量，N_k为第k个PRACH功能对应的前导码的数量，

为一个RACH时机包含的前导码的数量。A configuration module, configured to configure M, K, N _k and/or to the terminal

Wherein, M is the number of SSBs associated with one RACH opportunity, K is the number of PRACH functions included in one RACH opportunity, N _k is the number of preambles corresponding to the kth PRACH function,

It is the number of preambles included in one RACH opportunity.

Optionally, the PRACH function includes at least one of the following:

Contention-based random access 4-step RACH that does not contain Msg3 PUSCH repeated transmission;

2-step RACH based on contention-based random access;

4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH;

Indication of contention-based random access for reduced-capability terminals;

Contention-based random access for small data transfers;

Based on non-contention random access.

Optionally, the device also includes one of the following:

The first calculation module is used to calculate the RNTI according to the 4-step RACH RA-RNTI calculation method;

The second calculation module is used to calculate RNTI according to the MSGB-RNTI calculation method of 2-step RACH;

The third calculation module is used for calculating the RNTI in a dedicated calculation manner, and the dedicated calculation manner is different from the calculation manners of the RA-RNTI and the MSGB-RNTI.

Optionally, the special calculation method is:

RNTI=1+s_id1+14×t_id1+14×80×f_id1+14×80×8×ul_carrier_id;

or

RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×4;

Among them, s_id1=mod(s_id+Δ1,14), t_id1=mod(t_id+Δ2,80), f_id1=mod(f_id+Δ3,8), Δ1, Δ2, Δ3 are integers greater than or equal to zero, configured by the network side Or the protocol is predefined, s_id indicates the first OFDM symbol number of the PRACH, t_id indicates the first time slot number of the PRACH, f_id is the frequency domain number of the PRACH, and ul_carrier_id indicates the type of the uplink carrier.

The apparatus for determining the transmission resources of Msg1 provided in the embodiment of the present application can realize each process realized by the method embodiment in FIG. 5 and achieve the same technical effect. To avoid repetition, details are not repeated here.

As shown in Figure 11, the embodiment of the present application also provides a communication device 110, including a processor 111, a memory 112, and programs or instructions stored in the memory 112 and operable on the processor 111, for example, the communication When the device 110 is a terminal, when the program or instruction is executed by the processor 111, various processes of the above-mentioned embodiment of the method for determining the Msg1 transmission resource executed by the terminal are implemented, and the same technical effect can be achieved. When the communication device 110 is a network-side device, when the program or instruction is executed by the processor 111, each process of the above-mentioned embodiment of the method for determining Msg1 transmission resources executed by the network-side device can be achieved, and the same technical effect can be achieved. To avoid Repeat, no more details here.

The embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein:

The processor is used to determine the sending parameters of Msg1 of the random access procedure of Msg3 PUSCH repeated transmission, wherein the sending parameters include RACH opportunity and preamble, and the sending parameters meet one of the following conditions:

Use the same RACH timing as 4-step RACH, but different preambles;

Use RACH timing different from 4-step RACH;

The communication interface is used to send the Msg1 of the random access procedure of the Msg3 PUSCH repeated transmission according to the sending parameters.

This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment, and each implementation process and implementation mode of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect. Specifically, FIG. 12 is a schematic diagram of a hardware structure of a terminal implementing an embodiment of the present application.

The terminal 120 includes, but is not limited to: a radio frequency unit 121, a network module 122, an audio output unit 123, an input unit 124, a sensor 125, a display unit 126, a user input unit 127, an interface unit 128, a memory 129, and a processor 1210, etc. at least some of the components.

Those skilled in the art can understand that the terminal 120 may also include a power supply (such as a battery) for supplying power to various components, and the power supply may be logically connected to the processor 1210 through the power management system, so as to manage charging, discharging, and power consumption through the power management system. Management and other functions. The terminal structure shown in FIG. 12 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine some components, or arrange different components, which will not be repeated here.

It should be understood that, in the embodiment of the present application, the input unit 124 may include a graphics processing unit (Graphics Processing Unit, GPU) 1241 and a microphone 1242, and the graphics processing unit 1241 is compatible with an image capture device (such as Camera) to process the image data of still pictures or videos. The display unit 126 may include a display panel 1261, and the display panel 1261 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 127 includes a touch panel 1271 and other input devices 1272 . The touch panel 1271 is also called a touch screen. The touch panel 1271 may include two parts, a touch detection device and a touch controller. Other input devices 1272 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, and joysticks, which will not be repeated here.

In the embodiment of the present application, the radio frequency unit 121 receives the downlink data from the network side device, and processes it to the processor 1210; in addition, sends the uplink data to the network side device. Generally, the radio frequency unit 121 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 129 can be used to store software programs or instructions as well as various data. The memory 129 may mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area may store an operating system, an application program or instructions required by at least one function (such as a sound playback function, an image playback function, etc.) and the like. In addition, the memory 129 may include a high-speed random access memory, and may also include a nonvolatile memory, wherein the nonvolatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM) , PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. For example at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device.

The processor 1210 may include one or more processing units; optionally, the processor 1210 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, application programs or instructions, etc., Modem processors mainly handle wireless communications, such as baseband processors. It can be understood that the foregoing modem processor may not be integrated into the processor 1210 .

Wherein, the processor 1210 is configured to determine the sending parameters of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, where the sending parameters include RACH opportunity and preamble, and the sending parameters meet one of the following conditions:

Use the same RACH timing as 4-step RACH, but different preambles;

Use RACH timing different from 4-step RACH;

The radio frequency unit 121 is configured to send the Msg1 of the random access procedure of the Msg3 PUSCH repeated transmission according to the sending parameters.

In the embodiment of the present application, the method for determining the transmission resource of Msg1 in the random access procedure of the repeated PUSCH transmission of Msg3 is clarified, so as to ensure that the network side equipment and the terminal can accurately determine the usage of the PRACH resource.

Optionally, if Msg1 of the random access procedure of repeated Msg3 PUSCH transmission uses the same RACH opportunity as that of 4-step RACH, the preamble of Msg1 of the random access procedure of Msg3 PUSCH repeated transmission is in Msg1 of 4-step RACH after the CBRA preamble.

Optionally, using an RACH timing different from the 4-step RACH includes one of the following:

Use the same RACH timing as 2-step RACH, but different preambles, where 2-step RACH and 4-step RACH use different RACH timing;

Using independently configured RACH timings, wherein the independently configured RACH timings are different from 2-step RACH and 4-step RACH timings.

Optionally, if Msg1 in the random access procedure of repeated Msg3 PUSCH transmission uses the same RACH opportunity as that of 2-step RACH, the preamble of Msg1 in the random access procedure of repeated Msg3 PUSCH transmission is in the CBRA of 2-step RACH after the preamble.

Optionally, the RACH timing using independent configuration includes one of the following:

The configured independent RACH timing and 4-step RACH RACH timing adopt frequency domain multiplexing;

The independent RACH opportunity and the 4-step RACH RACH opportunity adopt time domain multiplexing.

Optionally, the processor 1210 is configured to determine the first preamble index set of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission; randomly select a preamble from the first preamble index set as the Msg3 PUSCH repeated The preamble of Msg1 of the transmitted random access procedure.

Optionally, determining the first preamble index set of Msg1 used for the random access procedure of Msg3 PUSCH repeated transmission includes:

Determine each PRACH function included in the first RACH opportunity of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission;

determining the start index of the preamble of each PRACH function;

0≤i≤K-1，0≤k≤K-1，0≤j≤M-1，其中，

为所述第一RACH时机包含的前导码的数量，所述第一RACH时机上包含K个PRACH功能，N_k为第k个PRACH功能对应的前导码的数量。Wherein, the first RACH opportunity is associated with M SSBs, and the start index of the preamble of the i-th PRACH function in the preamble index set of the j-th SSB associated with the first RACH opportunity is:

0≤i≤K-1, 0≤k≤K-1, 0≤j≤M-1, where,

is the number of preambles included in the first RACH opportunity, the first RACH opportunity includes K PRACH functions, and N _k is the number of preambles corresponding to the kth PRACH function.

由网络侧配置或协议预定义。Optionally, M, K, N _k and

It is configured by the network side or predefined by the protocol.

Optionally, the PRACH function includes at least one of the following:

Contention-based random access 4-step RACH that does not contain Msg3 PUSCH repeated transmission;

2-step RACH based on contention-based random access;

4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH;

Indication of contention-based random access for reduced-capability terminals;

Contention-based random access for small data transfers;

Based on non-contention random access.

Optionally, the mapping order of the K PRACH functions included in the first RACH opportunity is predefined by a protocol or configured by a system message.

Optionally, the index of the preamble of the PRACH function is arranged in the following order from small to large:

Contention-based random access 4-step RACH that does not contain Msg3 PUSCH repeated transmission;

2-step RACH based on contention-based random access;

4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH;

Indication of contention-based random access for reduced-capability terminals;

Contention-based random access for small data transfers;

Based on non-contention random access.

Optionally, at least one of the following PRACH functions is transmitted using the same RACH timing as 2-step-RACH:

2-step RACH based on contention-based random access;

4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH;

Indication of contention-based random access for reduced-capability terminals;

Small data transfers with contention-based random access.

Optionally, at least one of the following PRACH functions is transmitted using independently configured RACH occasions:

4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH;

Indication of contention-based random access for reduced-capability terminals;

Small data transfers with contention-based random access.

其中，

S为Msg3 PUSCH重复传输的随机接入流程的Msg1的CBRA前导码的数量，R是与所述第一RACH时机关联的每个SSB上的4-step RACH的Msg1的CBRA前导码的数量。Optionally, if Msg1 in the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH timing as 4-step RACH, and 2-step RACH is not configured or 2-step RACH uses a different RACH timing from 4-step RACH, The start index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of the Msg3 PUSCH of the jth SSB associated with the first RACH opportunity is:

in,

S is the number of CBRA preambles of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and R is the number of CBRA preambles of Msg1 in the 4-step RACH on each SSB associated with the first RACH opportunity.

Optionally, if Msg1 of the random access procedure for repeated Msg3 PUSCH transmission uses the same RACH timing as 4-step RACH, and 2-step RACH is configured, Msg3 of the jth SSB associated with the first RACH timing The start index of the CBRA preamble of Msg1 in the random access procedure of PUSCH repeated transmission meets one of the following conditions:

其中，

If the first RACH opportunity supports the random access process of 4-step RACH, 2-step RACH and Msg3PUSCH repeated transmission at the same time, the random access procedure of the j-th SSB associated with the first RACH opportunity for Msg3 PUSCH repeated transmission The starting index of the CBRA preamble of Msg1 of the process is:

in,

其中，

If the network side indicates that the first RACH opportunity is used as a 2-step RACH through high-level signaling, the complementary mask corresponding to the mask configured by the 2-step RACH is used as the mask of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission , the starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of the Msg3PUSCH of the jth SSB associated with the first RACH opportunity is:

in,

若第一RACH时机只支持Msg3PUSCH重复传输的随机接入流程，与所述第一RACH时机关联的第j个SSB的Msg3 PUSCH重复传输的随机接入流程的Msg1的CBRA前导码的起始索引为：

If the Msg1 of the random access procedure of 2-step RACH and Msg3 PUSCH repeated transmission is configured with a mask, and the first RACH opportunity supports the random access procedure of 2-step RACH and Msg3 PUSCH repeated transmission at the same time, and the first The starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of Msg3 PUSCH of the jth SSB associated with the RACH opportunity is:

If the first RACH opportunity only supports the random access procedure of repeated transmission of Msg3 PUSCH, the start index of the CBRA preamble of Msg1 of the random access procedure of the jth SSB associated with the first RACH opportunity of repeated transmission of Msg3 PUSCH is :

Among them, S is the number of CBRA preambles of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and R is the number of CBRA preambles of Msg1 on each SSB of the 4-step RACH associated with the first RACH opportunity , Q is the number of CBRA preambles of the 2-step RACH on each SSB associated with the first RACH opportunity.

Optionally, the sending parameters of Msg1 determining the random access procedure of Msg3 PUSCH repeated transmission include at least one of the following:

If the second RACH opportunity requires supporting Msg1 of the random access procedure of 4-step RACH, 2-step RACH and Msg3PUSCH repeated transmission at the same time, it is considered that the second RACH opportunity is not available for Msg1 of the random access procedure of Msg3 PUSCH repeated transmission use;

则认为所述第二RACH时机对Msg3PUSCH重复传输的随机接入流程的Msg1不可用。If the second RACH opportunity is required to support 4-step RACH, 2-step RACH, Msg1 of the random access procedure of repeated transmission of Msg3 PUSCH, and the random access procedure of 4-step RACH, 2-step RACH, and Msg3 PUSCH repeated transmission The sum of preambles configured for Msg1 exceeds the maximum number of preambles

Then it is considered that the second RACH opportunity is not available for Msg1 of the random access procedure of Msg3 PUSCH repeated transmission.

则认为所述第二RACH时机能够作为所述第一RACH时机用于Msg3 PUSCH重复传输的随机接入流程的Msg1，所述第二RACH时机对Msg3 PUSCH重复传输的随机接入流程的Msg1的起始位置为

数量为

其中，R是与所述第二RACH时机关联的每个SSB上的4-step RACH的Msg1的CBRA前导码的数量，Q为与所述第二RACH时机关联的每个SSB上的2-step RACH的CBRA前导码的数量。If the second RACH opportunity is required to support 4-step RACH, 2-step RACH, Msg1 of the random access procedure of repeated transmission of Msg3 PUSCH, and the random access procedure of 4-step RACH, 2-step RACH, and Msg3 PUSCH repeated transmission The sum of preambles configured for Msg1 exceeds the maximum number of preambles

Then it is considered that the second RACH opportunity can be used as the first RACH opportunity for Msg1 of the random access procedure of Msg3 PUSCH repeated transmission, and the second RACH opportunity is the start of Msg1 of the random access procedure of Msg3 PUSCH repeated transmission starting position is

Quantity is

Wherein, R is the number of CBRA preambles of Msg1 of 4-step RACH on each SSB associated with the second RACH opportunity, and Q is the 2-step on each SSB associated with the second RACH opportunity Number of CBRA preambles for RACH.

其中，Q为与所述第一RACH时机关联的每个SSB上的2-step RACH的CBRA前导码的数量。Optionally, if Msg1 of the random access procedure of repeated Msg3 PUSCH transmission uses the same RACH timing as that of 2-step RACH, the random access procedure of Msg3 PUSCH repeated transmission of the jth SSB associated with the first RACH timing The starting sequence index of the CBRA preamble of Msg1 is:

Wherein, Q is the number of CBRA preambles of the 2-step RACH on each SSB associated with the first RACH opportunity.

Optionally, if Msg1 of the random access procedure of repeated Msg3 PUSCH transmission uses the same RACH timing as that of 2-step RACH, the random access procedure of Msg3 PUSCH repeated transmission of the jth SSB associated with the first RACH timing The start index of the CBRA preamble of Msg1 satisfies one of the following conditions:

If the 2-step RACH is configured with a mask, the complementary mask corresponding to the mask configured by the 2-step RACH is used as the mask of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and the first RACH opportunity associated The starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of Msg3 PUSCH of the j-th SSB is:

其中，

若第一RACH时机只支持Msg3 PUSCH重复传输的随机接入流程，与所述第一RACH时机关联的第j个SSB的Msg3PUSCH重复传输的随机接入流程的Msg1的CBRA前导码的起始索引为：

If the Msg1 of the random access procedure of repeated transmission of 2-step RACH and Msg3 PUSCH is configured with a mask, and the first RACH opportunity supports the Msg1 of the random access procedure of repeated transmission of 2-step RACH and Msg3 PUSCH at the same time, and the above The start index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of the Msg3 PUSCH of the jth SSB associated with the first RACH opportunity is:

in,

If the first RACH opportunity only supports the random access procedure of repeated transmission of Msg3 PUSCH, the start index of the CBRA preamble of Msg1 of the random access procedure of the jth SSB associated with the first RACH opportunity of repeated transmission of Msg3 PUSCH is :

Wherein, S is the number of CBRA preambles of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and Q is the number of CBRA preambles of 2-step RACH on each SSB associated with the first RACH opportunity.

Optionally, according to the sending parameters, after Msg1 of the random access procedure of sending Msg3 PUSCH repeated transmission, it also includes:

Listening to Msg2, wherein the terminal judges whether the received Msg2 is the Msg2 corresponding to the Msg1 repeatedly transmitted by the Msg3 PUSCH according to the RNTI and/or the random access preamble identifier RAPID included in the received Msg2.

Optionally, if Msg1 of the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH timing as 4-step RACH, the terminal judges whether the received Msg2 is Msg3 according to the RNTI and/or the RAPID contained in the received Msg2 Msg2 corresponding to Msg1 of PUSCH repeated transmission includes:

The terminal calculates the RNTI according to the 4-step RACH RA-RNTI calculation method, and uses RAPID to judge whether the received Msg2 is the Msg2 corresponding to the Msg1 of the Msg3 PUSCH repeated transmission;

Calculate the RNTI according to the MSGB-RNTI calculation method of 2-step RACH, and use RAPID to judge whether the received Msg2 is the Msg2 corresponding to the Msg1 of the repeated transmission of Msg3 PUSCH;

The RNTI is calculated according to a special calculation method, which is different from the calculation methods of the RA-RNTI and the MSGB-RNTI.

Optionally, if Msg1 in the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH timing as 2-step RACH, judge whether the received Msg2 is Msg3PUSCH repeated transmission according to the RNTI and/or the RAPID included in the received Msg2 Msg2 corresponding to Msg1 includes:

Calculate the RNTI according to the MSGB-RNTI calculation method of 2-step RACH, and use RAPID to judge whether the received Msg2 is the Msg2 corresponding to the Msg1 of the repeated transmission of Msg3 PUSCH;

The RNTI is calculated according to a special calculation method, which is different from the calculation methods of the RA-RNTI and the MSGB-RNTI.

Optionally, the special calculation method is:

RNTI=1+s_id1+14×t_id1+14×80×f_id1+14×80×8×ul_carrier_id;

or

RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×4;

Among them, s_id1=mod(s_id+Δ1,14), t_id1=mod(t_id+Δ2,80), f_id1=mod(f_id+Δ3,8), Δ1, Δ2, Δ3 are integers greater than or equal to zero, configured by the network side Or the protocol is predefined, s_id indicates the first OFDM symbol number of the PRACH, t_id indicates the first time slot number of the PRACH, f_id is the frequency domain number of the PRACH, and ul_carrier_id indicates the type of the uplink carrier.

The embodiment of the present application also provides a network side device, including a processor and a communication interface, where:

The communication interface is used to receive the Msg1 sent by the terminal;

The processor is configured to determine that the Msg1 is the Msg1 of the random access procedure for Msg3PUSCH repeated transmission if the sending parameters of the Msg1 meet one of the following conditions:

Use the same RACH timing as 4-step RACH, but different preambles;

Use RACH timing different from 4-step RACH.

The network-side device embodiment corresponds to the above-mentioned network-side device method embodiment, and each implementation process and implementation mode of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.

Specifically, the embodiment of the present application also provides a network side device. As shown in FIG. 13 , the network device 1300 includes: an antenna 131 , a radio frequency device 132 , and a baseband device 133 . The antenna 131 is connected to the radio frequency device 132 . In the uplink direction, the radio frequency device 132 receives information through the antenna 131, and sends the received information to the baseband device 133 for processing. In the downlink direction, the baseband device 133 processes the information to be sent and sends it to the radio frequency device 132 , and the radio frequency device 132 processes the received information and sends it out through the antenna 131 .

The foregoing frequency band processing device may be located in the baseband device 133 , and the method executed by the network side device in the above embodiments may be implemented in the baseband device 133 , and the baseband device 133 includes a processor 134 and a memory 135 .

The baseband device 133 can include at least one baseband board, for example, a plurality of chips are arranged on the baseband board, as shown in FIG. The network device operations shown in the above method embodiments.

The baseband device 133 may further include a network interface 136 for exchanging information with the radio frequency device 132, such as a common public radio interface (common public radio interface, CPRI for short).

Specifically, the network-side device in the embodiment of the present application further includes: instructions or programs stored in the memory 135 and operable on the processor 134, and the processor 134 calls the instructions or programs in the memory 135 to execute the modules shown in FIG. 5 To avoid duplication, the method of implementation and to achieve the same technical effect will not be repeated here.

The embodiment of the present application also provides a readable storage medium, the readable storage medium stores a program or an instruction, and when the program or instruction is executed by the processor, each process in the above embodiment of the method for determining the Msg1 transmission resource is implemented, and The same technical effect can be achieved, so in order to avoid repetition, details will not be repeated here.

Wherein, the processor is the processor in the terminal described in the foregoing embodiments. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

The embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, the processor is used to run programs or instructions, and implement the above-mentioned method for determining Msg1 transmission resources The various processes of the embodiment can achieve the same technical effect, so in order to avoid repetition, details are not repeated here.

It should be understood that the chip mentioned in the embodiment of the present application may also be called a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions are performed, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the technical solution of the present application can be embodied in the form of computer software products, which are stored in a storage medium (such as ROM/RAM, magnetic disk, etc.) , CD-ROM), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Under the inspiration of this application, without departing from the purpose of this application and the scope of protection of the claims, many forms can also be made, all of which belong to the protection of this application.

Claims (31)

1. A method for determining Msg1 transmission resources, comprising: The terminal determines the transmission parameters of Msg1 in the random access procedure of the repeated transmission of the physical uplink shared channel PUSCH of Msg3, wherein the transmission parameters include random access channel RACH timing and preamble, and the transmission parameters meet one of the following conditions: Use the same RACH timing as 4-step RACH, but different preambles; Use RACH timing different from 4-step RACH; The terminal sends Msg1 of the random access procedure of Msg3 PUSCH repeated transmission according to the sending parameters. 2. The method according to claim 1, wherein, if Msg1 of the random access procedure of repeated Msg3 PUSCH transmission uses the same RACH timing as 4-step RACH, the random access procedure of said Msg3 PUSCH repeated transmission The preamble of Msg1 follows the contention-based random access CBRA preamble of Msg1 of the 4-step RACH. 3. The method according to claim 1, wherein the use of an RACH timing different from that of the 4-step RACH comprises one of the following: Use the same RACH timing as 2-step RACH, but different preambles, where 2-step RACH and 4-step RACH use different RACH timing; Using independently configured RACH timings, wherein the independently configured RACH timings are different from RACH timings of 2-step RACH and 4-step RACH. 4. The method according to claim 3, wherein, if Msg1 of the random access procedure of repeated Msg3 PUSCH transmission uses the same RACH timing as 2-step RACH, the random access procedure of said Msg3 PUSCH repeated transmission The preamble of Msg1 follows the CBRA preamble of 2-step RACH. 5. The method according to claim 3, wherein using an independently configured RACH opportunity comprises one of the following: The configured independent RACH timing and 4-step RACH RACH timing adopt frequency domain multiplexing; The independent RACH opportunity and the 4-step RACH RACH opportunity adopt time domain multiplexing. 6. The method according to claim 3, wherein the terminal determines that the sending parameters of Msg1 of the random access procedure of Msg3 PUSCH repeated transmission include: The terminal determines the first preamble index set of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission; The terminal randomly selects a preamble from the first preamble index set as the preamble of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission. 7. The method according to claim 6, wherein the determination by the terminal of the first preamble index set of Msg1 for the random access procedure of Msg3 PUSCH repeated transmission comprises: The terminal determines the PRACH function of each physical random access channel included in the first RACH opportunity of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission; The terminal determines the start index of the preamble of each PRACH function; Wherein, the first RACH opportunity is associated with M synchronization signal blocks SSB, and the start index of the preamble of the i-th PRACH function in the preamble index set of the j-th SSB associated with the first RACH opportunity is:

0≤i≤K-1, 0≤k≤K-1, 0≤j≤M-1, where,

is the number of preambles included in the first RACH opportunity, the first RACH opportunity includes K PRACH functions, and N _k is the number of preambles corresponding to the kth PRACH function. 8. method according to claim 7, is characterized in that, M, K, N _k and

It is configured by the network side or predefined by the protocol. 9. The method according to claim 7, wherein the PRACH function comprises at least one of the following: Contention-based random access 4-step RACH that does not contain Msg3 PUSCH repeated transmission; 2-step RACH based on contention-based random access; 4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH; Indication of contention-based random access for reduced-capability terminals; Contention-based random access for small data transfers; Based on non-contention random access. 10. The method according to claim 9, wherein the mapping order of the K PRACH functions included in the first RACH opportunity is predefined by a protocol or configured by a system message. 11. The method of claim 7, wherein, If Msg1 in the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH timing as 4-step RACH, and 2-step RACH is not configured or 2-step RACH uses a different RACH timing from 4-step RACH, the same as the first The starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of Msg3 PUSCH of the jth SSB associated with a RACH opportunity is:

in,

S is the number of CBRA preambles of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and R is the number of CBRA preambles of Msg1 in the 4-step RACH on each SSB associated with the first RACH opportunity. 12. The method of claim 7, wherein, If Msg1 of the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH opportunity as 4-step RACH, and 2-step RACH is configured, the Msg3 PUSCH repeated transmission of the j-th SSB associated with the first RACH opportunity The start index of the CBRA preamble of Msg1 in the random access procedure meets one of the following conditions: If the first RACH opportunity supports the random access procedure of 4-step RACH, 2-step RACH and Msg3 PUSCH repeated transmission at the same time, the random access procedure of the j-th SSB associated with the first RACH opportunity The starting index of the CBRA preamble of Msg1 entering the process is:

in,

If the network side indicates that the first RACH opportunity is used as a 2-step RACH through high-level signaling, the complementary mask corresponding to the mask configured by the 2-step RACH is used as the mask of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission , the starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of the Msg3 PUSCH of the jth SSB associated with the first RACH opportunity is:

in,

If the Msg1 of the random access procedure of 2-step RACH and Msg3 PUSCH repeated transmission is configured with a mask, and the first RACH opportunity supports the random access procedure of 2-step RACH and Msg3 PUSCH repeated transmission at the same time, and the first The starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of Msg3 PUSCH of the jth SSB associated with the RACH opportunity is:

If the first RACH opportunity only supports the random access procedure of repeated transmission of Msg3 PUSCH, the start index of the CBRA preamble of Msg1 of the random access procedure of the jth SSB associated with the first RACH opportunity of repeated transmission of Msg3 PUSCH is :

Among them, S is the number of CBRA preambles of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and R is the number of CBRA preambles of Msg1 on each SSB of the 4-step RACH associated with the first RACH opportunity , Q is the number of CBRA preambles of the 2-step RACH on each SSB associated with the first RACH opportunity. 13. The method according to claim 7, wherein the terminal determines that the sending parameters of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission include at least one of the following: If the second RACH opportunity requires supporting Msg1 of the random access procedure of 4-step RACH, 2-step RACH and Msg3 PUSCH repeated transmission at the same time, it is considered that the second RACH opportunity is Msg1 of the random access procedure of Msg3 PUSCH repeated transmission unavailable; If the second RACH opportunity is required to support 4-step RACH, 2-step RACH, Msg1 of the random access procedure of repeated transmission of Msg3 PUSCH, and the random access procedure of 4-step RACH, 2-step RACH, and Msg3 PUSCH repeated transmission The sum of preambles configured for Msg1 exceeds the maximum number of preambles

Then it is considered that the second RACH opportunity is not available for Msg1 of the random access procedure of Msg3PUSCH repeated transmission; If the second RACH opportunity is required to support 4-step RACH, 2-step RACH, Msg1 of the random access procedure of repeated transmission of Msg3 PUSCH, and the random access procedure of 4-step RACH, 2-step RACH, and Msg3 PUSCH repeated transmission The sum of preambles configured for Msg1 exceeds the maximum number of preambles

Then it is considered that the second RACH opportunity can be used as the first RACH opportunity for Msg1 of the random access procedure of Msg3 PUSCH repeated transmission, and the second RACH opportunity is the start of Msg1 of the random access procedure of Msg3 PUSCH repeated transmission starting position is

Quantity is

Wherein, R is the number of CBRA preambles of Msg1 of 4-step RACH on each SSB associated with the second RACH opportunity, and Q is the 2-step on each SSB associated with the second RACH opportunity Number of CBRA preambles for RACH. 14. The method according to claim 7, wherein, if Msg1 of the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH opportunity as 2-step RACH, the jth associated with the first RACH opportunity The starting sequence index of the CBRA preamble of Msg1 in the random access procedure of Msg3PUSCH repeated transmission of SSB is:

Where Q is the number of CBRA preambles of 2-step RACH on each SSB associated with the first RACH opportunity. 15. The method according to claim 7, wherein, if Msg1 of the random access procedure of Msg3 PUSCH repeated transmission uses the same RACH timing as 2-step RACH, the jth associated with the first RACH timing The start index of the CBRA preamble of Msg1 in the random access procedure of Msg3PUSCH repeated transmission of SSB meets one of the following conditions: If the 2-step RACH is configured with a mask, the complementary mask corresponding to the mask configured by the 2-step RACH is used as the mask of Msg1 in the random access procedure of Msg3PUSCH repeated transmission, and the first RACH associated with the first RACH opportunity The starting index of the CBRA preamble of Msg1 in the random access procedure of repeated transmission of Msg3 PUSCH of j SSBs is:

If the Msg1 of the random access procedure of repeated transmission of 2-step RACH and Msg3 PUSCH is configured with a mask, and the first RACH opportunity supports the Msg1 of the random access procedure of repeated transmission of 2-step RACH and Msg3 PUSCH at the same time, and the above The starting index of the CBRA preamble of Msg1 in the random access procedure of the repeated transmission of Msg3 PUSCH of the jth SSB associated with the first RACH opportunity is:

in,

If the first RACH opportunity only supports the random access procedure of repeated transmission of Msg3 PUSCH, the start index of the CBRA preamble of Msg1 of the random access procedure of the jth SSB associated with the first RACH opportunity of repeated transmission of Msg3 PUSCH is :

Wherein, S is the number of CBRA preambles of Msg1 in the random access procedure of Msg3 PUSCH repeated transmission, and Q is the number of CBRA preambles of 2-step RACH on each SSB associated with the first RACH opportunity. 16. The method according to claim 3, wherein, according to the sending parameters, the terminal sends Msg3PUSCH repeated transmission after the random access procedure Msg1 of the random access procedure further includes: Listening to Msg2, wherein the terminal judges whether the received Msg2 is the Msg2 corresponding to the Msg1 repeatedly transmitted by the Msg3 PUSCH according to the wireless network temporary identifier RNTI and/or the random access preamble identifier RAPID included in the received Msg2. 17. The method according to claim 16, wherein, if Msg1 of the random access procedure of repeated transmission of Msg3 PUSCH uses the same RACH opportunity as 4-step RACH, the terminal according to the RNTI and/or the received Msg2 The included RAPID is used to determine whether the received Msg2 is Msg3PUSCH Msg1 corresponding to the repeated transmission of Msg2 includes: The terminal calculates the RNTI according to the 4-step RACH RA-RNTI calculation method, and uses RAPID to judge whether the received Msg2 is the Msg2 corresponding to the Msg1 of the Msg3 PUSCH repeated transmission; The terminal calculates the RNTI according to the MSGB-RNTI calculation method of 2-step RACH, and uses RAPID to determine whether the received Msg2 is the Msg2 corresponding to the Msg1 of the Msg3 PUSCH repeated transmission; The terminal calculates the RNTI according to a special calculation method, which is different from the calculation methods of the RA-RNTI and the MSGB-RNTI. 18. The method according to claim 16, wherein, if Msg1 of the random access procedure of repeated transmission of Msg3 PUSCH uses the same RACH opportunity as 2-step RACH, the terminal according to the RNTI and/or the received Msg2 The included RAPID is used to determine whether the received Msg2 is Msg3PUSCH Msg1 corresponding to the repeated transmission of Msg2 includes: The terminal calculates the RNTI according to the MSGB-RNTI calculation method of 2-step RACH, and uses RAPID to determine whether the received Msg2 is the Msg2 corresponding to the Msg1 of the Msg3 PUSCH repeated transmission; The terminal calculates the RNTI according to a special calculation method, which is different from the calculation methods of the random access radio network temporary identifier RA-RNTI and the MSGB-RNTI. 19. The method according to claim 17 or 18, wherein the dedicated calculation method is: RNTI=1+s_id1+14×t_id1+14×80×f_id1+14×80×8×ul_carrier_id; or RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×4; Among them, s_id1=mod(s_id+Δ1,14), t_id1=mod(t_id+Δ2,80), f_id1=mod(f_id+Δ3,8), Δ1, Δ2, Δ3 are integers greater than or equal to zero, configured by the network side Or the protocol is predefined, s_id indicates the first OFDM symbol number of the PRACH, t_id indicates the first time slot number of the PRACH, f_id is the frequency domain number of the PRACH, and ul_carrier_id indicates the type of the uplink carrier. 20. A method for determining Msg1 transmission resources, comprising: The network side device receives the Msg1 sent by the terminal; If the sending parameters of the Msg1 meet one of the following conditions, the network side device determines that the Msg1 is the Msg1 of the random access procedure of the Msg3PUSCH repeated transmission: Use the same RACH timing as 4-step RACH, but different preambles; Use RACH timing different from 4-step RACH. 21. The method according to claim 20, wherein using an RACH timing different from the 4-step RACH includes one of the following: Use the same RACH timing as 2-step RACH, but different preambles, where 2-step RACH and 4-step RACH use different RACH timing; Using independently configured RACH timings, wherein the independently configured RACH timings are different from RACH timings of 2-step RACH and 4-step RACH. 22. The method according to claim 21, wherein using an independently configured RACH opportunity includes one of the following: The configured independent RACH timing and 4-step RACH RACH timing adopt frequency domain multiplexing; The independent RACH opportunity and the 4-step RACH RACH opportunity adopt time domain multiplexing. 23. The method of claim 20, further comprising: The network side device configures M, K, N _k and/or

Wherein, M is the number of SSBs associated with one RACH opportunity, K is the number of PRACH functions included in one RACH opportunity, N _k is the number of preambles corresponding to the kth PRACH function,

It is the number of preambles included in one RACH opportunity. 24. The method according to claim 23, wherein the PRACH function comprises at least one of the following: Contention-based random access 4-step RACH that does not contain Msg3 PUSCH repeated transmission; 2-step RACH based on contention-based random access; 4-step RACH with contention-based random access including repeated transmission of Msg3 PUSCH; Indication of contention-based random access for reduced-capability terminals; Contention-based random access for small data transfers; Based on non-contention random access. 25. The method according to claim 20, further comprising one of the following: The network side device calculates the RNTI according to the 4-step RACH RA-RNTI calculation method; The network side device calculates the RNTI according to the MSGB-RNTI calculation method of 2-step RACH; The network side device calculates the RNTI according to a dedicated calculation method, which is different from the calculation methods of the RA-RNTI and the MSGB-RNTI. 26. The method according to claim 25, characterized in that, the dedicated calculation method is: RNTI=1+s_id1+14×t_id1+14×80×f_id1+14×80×8×ul_carrier_id; or RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×4; Among them, s_id1=mod(s_id+Δ1,14), t_id1=mod(t_id+Δ2,80), f_id1=mod(f_id+Δ3,8), Δ1, Δ2, Δ3 are integers greater than or equal to zero, configured by the network side Or the protocol is predefined, s_id indicates the first OFDM symbol number of the PRACH, t_id indicates the first time slot number of the PRACH, f_id is the frequency domain number of the PRACH, and ul_carrier_id indicates the type of the uplink carrier. 27. A device for determining Msg1 transmission resources, comprising: A determining module, configured to determine the sending parameters of Msg1 of the random access procedure of Msg3 PUSCH repeated transmission, wherein the sending parameters include RACH opportunity and preamble, and the sending parameters meet one of the following conditions: Use the same RACH timing as 4-step RACH, but different preambles; Use RACH timing different from 4-step RACH; The sending module is configured to send Msg1 of the random access procedure of Msg3 PUSCH repeated transmission according to the sending parameters. 28. A device for determining Msg1 transmission resources, comprising: The receiving module is used to receive the Msg1 sent by the terminal; A determination module, configured to determine that the Msg1 is the Msg1 of the random access procedure for Msg3PUSCH repeated transmission if the sending parameters of the Msg1 meet one of the following conditions: Use the same RACH timing as 4-step RACH, but different preambles; Use RACH timing different from 4-step RACH. 29. A terminal, characterized by comprising a processor, a memory, and a program or instruction stored on the memory and operable on the processor, when the program or instruction is executed by the processor, the following The steps of the method for determining Msg1 transmission resources according to any one of claims 1 to 19. 30. A network side device, characterized by comprising a processor, a memory, and a program or instruction stored in the memory and operable on the processor, when the program or instruction is executed by the processor The steps of the method for determining the transmission resource of Msg1 according to any one of claims 20 to 26 are realized. 31. A readable storage medium, characterized in that the readable storage medium stores programs or instructions, and when the programs or instructions are executed by a processor, the Msg1 transmission according to any one of claims 1 to 19 is realized A method for determining resources, or the steps for realizing the method for determining Msg1 transmission resources as claimed in any one of claims 20 to 26.

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