Reporting method of random access condition, terminal device and network device

Abstract

The embodiment of the present application provides a random access condition reporting method, a terminal device and a network device, which are applied to the technical field of communication, and the embodiment of the present application comprises the following steps: a first physical uplink shared channel (PUSCH) is sent to a network device; random access condition information is carried in the first PUSCH, and the random access condition information is used for indicating a reason for triggering random access; and the first PUSCH is associated with a first preamble signal.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a method for reporting random access conditions, a terminal device, and a network device. Background Technology

[0002] When introducing a two-step random access (RACH) procedure in a 5G NR system, the preamble originally reserved for the four-step random access (RACH) procedure can be used as the random access radio resource for 2-step RACH. However, when introducing new preamble ranges for new random access conditions, further division is needed within the existing reserved preamble so that network devices can distinguish these new random access triggering conditions. However, as the number of newly introduced random access triggering conditions increases, the limited preamble range results in a very small preamble range for each random access condition, leading to a higher probability of random access conflicts. Summary of the Invention

[0003] This invention provides a method for reporting random access conditions, a terminal device, and a network device, which can reduce the probability of random access conflicts.

[0004] Firstly, a method for reporting random access conditions is provided, applied to a terminal device, including:

[0005] Send the first Physical Uplink Shared Channel (PUSCH) to the network device;

[0006] The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access.

[0007] The first PUSCH is associated with the first preamble signal.

[0008] Secondly, a method for reporting random access conditions is provided, applied to network devices, including:

[0009] The first PUSCH sent by the receiving terminal device;

[0010] The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access.

[0011] The first PUSCH is associated with the first preamble signal.

[0012] Thirdly, a terminal device is provided, comprising: a transmitter for transmitting a first physical uplink shared channel (PUSCH) to a network device;

[0013] If the first PUSCH carries random access condition information, then the random access condition information is used to indicate the reason for triggering random access.

[0014] The first PUSCH is associated with the first preamble signal.

[0015] Fourthly, a network device is provided, comprising: a receiver for receiving a first PUSCH sent by a terminal device;

[0016] The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access.

[0017] The first PUSCH is associated with the first preamble signal.

[0018] Fifthly, a terminal device is provided, comprising: a transmitting module for transmitting a first Physical Uplink Shared Channel (PUSCH) to a network device;

[0019] The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access.

[0020] The first PUSCH is associated with the first preamble signal.

[0021] Sixthly, a network device is provided, comprising: a receiving module for receiving a first PUSCH sent by a terminal device;

[0022] The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access.

[0023] The first PUSCH is associated with the first preamble signal.

[0024] A seventh aspect provides a computer-readable storage medium comprising: computer instructions, which, when executed on a computer, cause a processor to perform a method as described in the first aspect or any optional implementation thereof, or to perform a method as described in the second aspect or any optional implementation thereof.

[0025] Eighthly, a computer program product is provided, comprising computer instructions, wherein when the computer program product is run on a computer, a processor executes the computer instructions, causing the processor to perform a method as described in the first aspect or any optional implementation thereof, or to perform a method as described in the second aspect or any optional implementation thereof.

[0026] Ninthly, a chip is provided, which is coupled to a memory in a terminal device, such that the chip, when running, calls program instructions stored in the memory, causing the terminal device to execute a method as described in the first aspect or any optional implementation thereof, or causing a network device to execute a method as described in the second aspect or any optional implementation thereof.

[0027] This invention provides a method for reporting random access conditions. In this method, a terminal device can send a first PUSCH to a network device. The first PUSCH carries random access condition information, which indicates the reason for triggering random access. The first PUSCH is associated with a first preamble signal. Through this scheme, the terminal device can carry random access condition information in the first PUSCH associated with the first preamble information. Compared to indicating random access conditions through a preamble, this method avoids the limitations of the preamble range and eliminates the need for further division within the existing reserved preamble, thus reducing the probability of random access conflicts. Attached Figure Description

[0028] Figure 1 A schematic diagram illustrating the repeated configuration of ROs in the time domain according to a certain period, provided as an embodiment of the present invention;

[0029] Figure 2 One embodiment of the present invention is a schematic diagram illustrating the relationship between RO and SSB;

[0030] Figure 3 A schematic diagram of the architecture of a communication system applied in an embodiment of the present invention is provided for the purpose of providing an embodiment of the present invention;

[0031] Figure 4 A flowchart illustrating a method for reporting random access conditions provided in an embodiment of the present invention;

[0032] Figure 5 A schematic diagram of the structure of a terminal device provided in an embodiment of the present invention. Figure 1 ;

[0033] Figure 6 A schematic diagram of the structure of a network device provided in an embodiment of the present invention;

[0034] Figure 7 A schematic diagram of a base station structure provided in an embodiment of the present invention.

[0035] Figure 8 A schematic diagram of the structure of a terminal device provided in an embodiment of the present invention. Figure 2 ; Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] First, the relevant technologies involved in the embodiments of the present invention will be introduced:

[0038] In 3rd Generation Partnership Project (3GPP) communication systems, such as 5G New Radio (NR) systems, terminal devices can establish, rebuild, or restore a Radio Resource Control (RRC) link through random access, or, if an RRC link exists, achieve uplink synchronization and power control initialization through random access.

[0039] In some cases, the base station needs to determine the reason for the terminal device sending the random access request by observing the first step of the random access process, in order to implement access control or better complete the random access process. In the first step of the random access process, the base station receives the preamble signal sent by the terminal device.

[0040] In a 5G NR system, the publicly available random access radio resources (referred to as raw random access radio resources in this document) configured within the cell are initially used for a 4-step Random Access Channel (4-step RACH) procedure. The smallest unit of random access radio resources in the time-frequency domain is called a random access channel opportunity (RACHoccasion, RO), and there are a total of 64 preambles within one RO. In a 5G NR system, a radio frame is 10 milliseconds long and contains 10 subframes of 1 millisecond each.

[0041] The number of time slots contained in a subframe is related to the subcarrier space (SCS) of that carrier. For example, a subframe contains one time slot on a carrier with a subcarrier space of 15 kHz.

[0042] Optionally, the other subcarrier spacings contain K time slots, where K is equal to the ratio between the other subcarrier spacings and 15 kHz.

[0043] For example, when SCS = 120 kHz, a subframe can contain 8 time slots. There are a total of 14 symbols in one time slot.

[0044] In the time domain, an RO can be several symbols within a time slot. That is, a time slot can contain multiple ROs, or a time slot can span several time slots (i.e., several time slots constitute one RO).

[0045] An RO (Radio Operational Representation) consists of several consecutive PRBs in the frequency domain, and the configuration of the RO repeats periodically in the time domain within a radio frame. For example... Figure 1 The diagram shown illustrates a method of repeatedly configuring ROs in the time domain according to a certain period. Figure 1 Each square represents a Radio Response Area (RO). Within a radio frame, ROs are configured on two subframes (e.g., for SCS=15kHz), resulting in a total of four ROs in the frequency domain. This configuration repeats according to the period of a radio frame.

[0046] In related technologies, when introducing new random access triggering reasons, the following two methods are generally used to configure the corresponding random access radio resources:

[0047] One approach is to configure additional random access radio resources that differ from the original random access radio resources.

[0048] Another method is to share some of the original random access radio resources. Assuming that the number of ROs associated with a certain carrier and an SSB is greater than 1, there are currently three sharing methods:

[0049] Share a specific RO;

[0050] Shared even number RO;

[0051] Shared odd number RO.

[0052] For example, such as Figure 2 The diagram illustrates the relationship between ROs and SSBs. Each RO is associated with two Synchronization Signal Blocks (SSBs), namely SSB1 and SSB2. Each SSB is associated with four ROs. Therefore, according to the current sharing method, the ROs that can be shared can be in the numbers {1}, {2}, {3}, {4}, {1,3}, and {2,4}. When an RO is associated with one or more SSBs, there is only one way to share the ROs: either all ROs can share, or none of the ROs can share.

[0053] According to existing standard protocols, the order of association between SSB and RO includes:

[0054] (1) Incrementing according to the preamble index within the same RO;

[0055] (2) Within the same time domain, the frequency domain is increased from low to high according to its position.

[0056] (3) Within a Physical Random Access Channel (PRACH) time slot, RO is incremented in the time domain.

[0057] (4) Increment between different PRACH time slots.

[0058] The PRACH slot refers to the slot containing the ROs mentioned above. In the existing 5G NR standard specifications, the number of ROs that an SSB can be associated with is 1, 2, 4, and 8. Furthermore, the number of SSBs associated with an RO can be 1, 2, 4, 8, and 16, meaning that a preamble is allocated to each SSB within an RO. The association relationship between the SSBs and ROs described above can be performed cyclically according to the actual SSBs transmitted within a half-frame. That is, the SSBs are associated with ROs sequentially from smallest to largest sequence number. After the SSB with the largest sequence number ends, the association with the SSB with the smallest sequence number begins, and so on. All the ROs associated with an SSB in such an SSB cycle can be called the SSB-associated RO set.

[0059] When introducing the 2-step RACH process in a 5G NR system, the aforementioned method can be used to share the original random access radio resources (ROs) originally reserved for 4-step RACH. Within the shared ROs, a segment of the preamble can be allocated as random access radio resources for 2-step RACH within the originally reserved preamble.

[0060] The current shared RO (Restricted Area) and preamble range determination methods of 2-step RACH are applicable to this random access method. However, when new preamble ranges are introduced to indicate new random access conditions, further division is needed within the existing reserved preambles so that the network can distinguish these new random access triggering conditions. This leads to a problem: as the number of newly introduced random access triggering conditions increases, the limited preamble range (64 preambles in a single RO) results in a very small preamble range for each random access condition, increasing the probability of random access collisions. Network devices need to increase random access resources to maintain an appropriate random access collision probability. However, the system's random access resources are limited by uplink spectrum resources and cannot be excessively increased, thus requiring a new solution.

[0061] To address the aforementioned problems, this invention provides a method for reporting random access conditions. In this method, a terminal device can send a first Physical Uplink Shared Channel (PUSCH) to a network device. If the first PUSCH carries random access condition information, this information indicates the reason for triggering random access. The first PUSCH is associated with a first preamble signal. This approach allows the terminal device to carry random access condition information within the first PUSCH associated with the first preamble signal. Compared to indicating random access conditions via a preamble, this method avoids the limitations of the preamble range and eliminates the need for further division within the existing reserved preamble, thus reducing the probability of random access conflicts.

[0062] This application describes various embodiments in conjunction with network devices and terminal devices. The terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device, etc.

[0063] Terminal devices can be stations (STAION, ST) in WLANs, cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistant (PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices, terminal devices in next-generation communication systems such as NR networks, or terminal devices in future evolved Public Land Mobile Network (PLMN) networks, etc.

[0064] In the embodiments of this application, the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships); and it can also be deployed in the air (such as airplanes, balloons and satellites).

[0065] In the embodiments of this application, the terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical care, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

[0066] By way of example and not limitation, in this embodiment, the terminal device can also be a wearable device. Wearable devices, also known as wearable smart devices, are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not merely hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are feature-rich, large in size, and can achieve complete or partial functions without relying on a smartphone, such as smartwatches or smart glasses, as well as those that focus on a specific type of application function and require the use of other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0067] Network equipment can be further divided into access network equipment and core network equipment. That is, the wireless communication system also includes multiple core networks used to communicate with the access network equipment. Access network equipment can be evolved Node Bs (eNBs or e-NodeBs) in Long-Term Evolution (LTE), Next-Generation Radio (NR) (mobile communication system), or Authorized Auxiliary Access Long-Term Evolution (LAA-LTE) systems, such as macro base stations, micro base stations (also called "small base stations"), pico base stations, access points (APs), transmission points (TPs), or new generation Node Bs (gNodeBs).

[0068] In the embodiments of this application, the network device can be a device for communicating with mobile devices. The network device can be an access point (AP) in WLAN, a base station (BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved Node B (eNB or eNodeB) in LTE, a relay station or access point, or a vehicle-mounted device, wearable device, or a network device (gNB) in an NR network, or a network device in a future evolved PLMN network or an NTN network, etc.

[0069] By way of example and not limitation, in this embodiment, the network device may have mobility characteristics; for example, the network device may be a mobile device. Optionally, the network device may be a satellite or a balloon station. For example, the satellite may be a low Earth orbit (LEO) satellite, a medium Earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station located on land, water, or other similar locations.

[0070] In this embodiment, the network device can provide services to a cell. The terminal device communicates with the network device through the transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell. The cell can be the cell corresponding to the network device (e.g., a base station). The cell can belong to a macro base station or to a base station corresponding to a small cell. The small cell can include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-speed data transmission services.

[0071] Figure 3 The diagram shows a structural schematic of a communication system applied in an embodiment of the present invention. The communication system may include network devices and terminal devices with communication functions. The method for reporting random access conditions provided in this embodiment of the present invention can be realized through the interaction between the network devices and the terminal devices.

[0072] The technical solutions of this application embodiment can be applied to various communication systems, such as: Global System for Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, evolution of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), and Wireless Fidelity (WF). Fidelity (WiFi), 5th-Generation (5G) communication systems, or other communication systems.

[0073] Traditional communication systems typically support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication but also, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication. The embodiments of this application can also be applied to these communication systems.

[0074] The communication system in this application embodiment can be applied to carrier aggregation (CA) scenarios, dual connectivity (DC) scenarios, and standalone (SA) network deployment scenarios.

[0075] Optionally, the communication system in this application embodiment can be applied to unlicensed spectrum, wherein unlicensed spectrum can also be considered as shared spectrum; or, the communication system in this application embodiment can also be applied to licensed spectrum, wherein licensed spectrum can also be considered as non-shared spectrum.

[0076] Optionally, the embodiments of this application can be applied to non-terrestrial network (NTN) systems or terrestrial network (TN) systems.

[0077] It should be understood that the terms "system" and "network" are often used interchangeably in this document. The term "and / or" in this document merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0078] It should be understood that the term "instruction" mentioned in the embodiments of this application can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0079] In the description of the embodiments of this application, the term "correspondence" may indicate that there is a direct or indirect correspondence between two things, or that there is an association between two things, or that there is a relationship of instruction and being instructed, configuration and being configured, etc.

[0080] Optionally, the indication information in the embodiments of this application includes physical layer signaling, such as at least one of Downlink Control Information (DCI), Radio Resource Control (RRC) signaling, and Media Access Control (MAC CE).

[0081] Optionally, the higher-layer parameters or higher-layer signaling in the embodiments of this application include at least one of Radio Resource Control (RRC) signaling and Media Access Control Control Element (MAC CE).

[0082] The technical solution of the present invention will be further described below by way of embodiments. The embodiments of this application include some or all of the following:

[0083] like Figure 4 The diagram shown is a flowchart illustrating a method for reporting random access conditions according to an embodiment of the present invention. The method includes:

[0084] 401. The terminal device sends a first preamble signal to the network device.

[0085] 402. The terminal device sends a first PUSCH associated with the first preamble signal to the network device.

[0086] Optionally, the first preamble signal mentioned above is a preamble signal corresponding to the 2-step RACH process.

[0087] Optionally, the first preamble signal mentioned above is a preamble signal corresponding to the 4-step RACH process.

[0088] Optionally, the first preamble signal mentioned above can also be other preamble signals corresponding to the random access process.

[0089] Optionally, when the first preamble is a preamble corresponding to the two-step random access procedure, the first preamble and the first PUSCH are carried in message A (i.e., Message A) in the 2-step RACH procedure.

[0090] In other words, the terminal device sends Message A to the network device, including executing the aforementioned 401 and 402. Message A consists of two parts: a preamble (i.e., the first preamble signal) and a PUSCH resource block associated with the preamble (i.e., the first PUSCH). When the terminal device triggers the 2-step RACH procedure, the selection and transmission of the preamble and PUSCH in message A can continue in the existing manner. However, random access condition information can be added to the PUSCH resource block. This random access condition information contains information related to the triggering conditions for the terminal device to initiate random access.

[0091] Regarding whether the first PUSCH carries random access condition information, there are two possibilities:

[0092] Scenario 1: The first PUSCH carries random access condition information;

[0093] (1) The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access.

[0094] (2) The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access without distinguishing the reason.

[0095] Optionally, the random access condition information carried in the first PUSCH may include, but is not limited to, the following implementation methods:

[0096] Implementation method 1: Random access condition information is carried in the Media Access Control (MAC) Protocol Data Unit (PDU).

[0097] Optionally, random access condition information can be indicated by bits in the new MAC control unit CE within the MAC Protocol Data Unit (PDU).

[0098] Optionally, random access condition information can be indicated by reserved bits in the existing MAC CE in the MAC PDU.

[0099] Implementation method 2: Carry random access condition information in RRC signaling.

[0100] Scenario 2: The first PUSCH does not carry random access condition information.

[0101] If the first PUSCH does not carry random access condition information, the first PUSCH indication does not distinguish the reason for triggering random access.

[0102] Optionally, the reasons for triggering random access mentioned above include, but are not limited to, at least one of the following reasons: (A), (B), (C), and (D):

[0103] (A) Terminal devices transmit small data packets (SDT) in an inactive state.

[0104] (B) Terminal device request coverage enhancement;

[0105] (C) The terminal device is a reduced capability UE (Redcap UE);

[0106] (D) The terminal device triggers at least one network slice for random access.

[0107] Optionally, the random access condition information includes a first indication field, the value of which is used to indicate that the reason for triggering random access is a target reason among at least one reason.

[0108] Optionally, the value of the first indicator field includes a first value and / or a second value;

[0109] The first value indicates that the reason for triggering the random access condition is the target reason among at least one reason, and the second value indicates that the reason for triggering the random access condition is not distinguished.

[0110] Optionally, the random access condition information includes at least one bit; the number of bits in the at least one bit is determined based on the number of network slice groups and / or the number of network slices.

[0111] Optionally, the random access condition information includes at least one bit; the value of the at least one bit includes: a first indication value and a second indication value;

[0112] The first indicator value is used to indicate the reason;

[0113] The second indicator value is used to indicate the reason for triggering random access without distinguishing between them.

[0114] Optionally, the random access condition information includes at least one bit; the value of the at least one bit includes: a first indication value and a second indication value;

[0115] The first indication value is used to instruct the terminal device to trigger at least one network slice for random access;

[0116] The second indicator value is used to indicate network slices that are randomly triggered regardless of the terminal device;

[0117] The number of bits for at least one bit is determined based on the number of network slice groups and / or the number of network slices.

[0118] Furthermore, depending on the reason for triggering random access indicated by the random access condition information, the random access condition information can be indicated in different ways, including but not limited to the following implementation methods:

[0119] Method 1: Indicate one reason for triggering random access by using a first indicator value of one bit;

[0120] Method 2: Indicate the reason for triggering random access by using a first indicator value of one bit.

[0121] Optionally, the first indicator value is 0, or the second indicator value is 1, or the first indicator value is 1 and the second indicator value is 0.

[0122] When there is only one random access reason in the random access condition information, one bit can be used to distinguish the reason. For example, one bit can be used to indicate the reasons (A), (B) and (C) mentioned above.

[0123] For example, when a certain bit has a value of 1, it can indicate one reason corresponding to that bit; when a certain bit has a value of 0, it can indicate one reason corresponding to that bit that triggers random access, regardless of whether it is a given reason.

[0124] Method 3: Instruct the terminal device to trigger at least one network slice for random access via at least one bit;

[0125] Method 4: Indicate network slicing that triggers random access regardless of the terminal device by using at least one bit;

[0126] Since there may be multiple network slices or network slice groups, a specific network slice or network slice group can be indicated by at least one bit.

[0127] The number of bits for at least one bit can be determined based on the number of network slice groups, the number of bits for at least one bit can be determined based on the number of network slices, and the number of bits for at least one bit can also be determined based on the number of network slice groups and the number of network slices.

[0128] Method 5: Indicate various reasons for triggering random access by using corresponding sets of bit information;

[0129] Method 6: Indicates that the various reasons for triggering random access are not distinguished by corresponding multiple sets of bit information;

[0130] Each set of bit information corresponds to a cause, and each set of bit information includes at least one bit.

[0131] Method 7: The random access condition information is index information, and the index information corresponds to at least one reason.

[0132] When the random access condition information contains more than one random access reason, the random access condition information can be indicated using either independent encoding or joint encoding. Independent encoding refers to using separate information bits to represent the triggering reason, corresponding to methods 5 and 6 above. Joint encoding refers to encoding methods other than independent encoding, such as using an index number to index a specific combination, corresponding to method 7 above. The following provides exemplary descriptions of independent encoding and joint encoding methods:

[0133] Independent encoding method:

[0134] Suppose that random access reasons A, B, and C require a bits, b bits, and c bits respectively to distinguish different cases. When any two or three reasons need to be combined, the independent encoding method uses a bits, b bits, and c bits to independently represent random access reasons A, B, and C. Specifically, a value of 1 for a bit represents random access reason A; a value of 1 for b bit represents random access reason B; and a value of 1 for c bit represents random access reason C. Table 1 below shows the specific indication method for indicating random access condition information using independent encoding.

[0135] No need to distinguish 0 0 0 A 1 0 0 B 0 1 0

[0136] C 0 0 1 A+C 1 0 1 B+C 0 1 1 A+B+C 1 1 1

[0137] Table 1

[0138] In Table 1, when bits a, b, and c are all 0, it means that there is no need to distinguish between random access reasons A, B, and C.

[0139] Combined encoding method:

[0140] Joint encoding generally requires encoding the combination of causes. Corresponding indices can be set for different random access conditions, as shown in Table 2. The last three combinations in Table 2 (i.e., A+C, B+C and A+B+C) can be left unexpressed if no reasonable combination is input, and can be reserved for future expansion, saving the bits corresponding to unreasonable combinations.

[0141] No need to distinguish 0 A 1 B 2 A+B 3 C 4 A+C Reserved B+C Reserved A+B+C Reserved

[0142] Table 2

[0143] In cases where no distinction is needed, at least one bit (code point) can be used to represent the situation, or the presence or absence of this random access condition information can be used to represent the situation, i.e., the random access condition information is not carried in the first PUSCH.

[0144] 403. The network device sends a random access response message to the terminal device.

[0145] In the 2-step RACH process, the aforementioned 403 may be Message B sent by the network device to the terminal device.

[0146] When the above-mentioned method for reporting random access conditions is applied to the 2-step RACH process, it has the following advantages:

[0147] (1) Except for carrying random access triggering condition information, all existing 2-step RACH processes can be reused;

[0148] (2) Existing 2-step RACH radio resources can be reused, that is, no new 2-step RACH radio resources need to be added;

[0149] (3) No further partitioning of 2-step RACH radio resources is required, thus not increasing the probability of random access collisions.

[0150] This invention provides a method for reporting random access conditions. In this method, a terminal device can send a first PUSCH to a network device. The first PUSCH carries random access condition information, which indicates at least one reason for triggering random access. The first PUSCH is associated with a first preamble signal. This approach allows the terminal device to carry random access condition information in the first PUSCH associated with the first preamble signal. Compared to indicating random access conditions via a preamble, this method avoids the limitations of the preamble range and eliminates the need for further division within the existing reserved preamble, thus reducing the probability of random access conflicts.

[0151] like Figure 5 As shown, an embodiment of the present invention provides a terminal device, including:

[0152] The transmitting module 501 is used to transmit the first physical uplink shared channel (PUSCH) to the network device;

[0153] The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access.

[0154] The first PUSCH is associated with the first preamble signal.

[0155] Optionally, the random access condition information is also used to indicate the reason for triggering random access without distinguishing between them.

[0156] Optionally, if the first PUSCH does not carry random access condition information, the first PUSCH indication does not distinguish the reason for triggering random access.

[0157] Optionally, the reasons for triggering random access include at least one of the following:

[0158] Terminal devices transmit small data packets in an inactive state;

[0159] Terminal devices request enhanced coverage;

[0160] The terminal equipment is a simplified version;

[0161] The terminal device triggers random access to at least one network slice.

[0162] Optionally, the random access condition information includes a first indication field, the value of which is used to indicate that the reason for triggering random access is a target reason among at least one reason.

[0163] Optionally, the value of the first indicator field includes a first value and / or a second value;

[0164] The first value indicates that the reason for triggering the random access condition is the target reason among at least one reason, and the second value indicates that the reason for triggering the random access condition is not distinguished.

[0165] Optionally, the random access condition information includes at least one bit; the number of bits in the at least one bit is determined based on the number of network slice groups and / or the number of network slices.

[0166] Optionally, the random access condition information includes at least one bit; the value of the at least one bit includes: a first indication value and a second indication value;

[0167] The first indicator value is used to indicate the reason;

[0168] The second indicator value is used to indicate the reason for triggering random access without distinguishing between them.

[0169] Optionally, the random access condition information includes at least one bit; the value of the at least one bit includes: a first indication value and a second indication value;

[0170] The first indicator value is used to indicate the reason;

[0171] The second indicator value is used to indicate the reason for triggering random access without distinguishing between them.

[0172] Optionally, the random access condition information includes at least one bit; the value of the at least one bit includes: a first indication value and a second indication value;

[0173] The first indication value is used to instruct the terminal device to trigger at least one network slice for random access;

[0174] The second indicator value is used to indicate network slices that are randomly triggered regardless of the terminal device;

[0175] The number of bits for at least one bit is determined based on the number of network slice groups and / or the number of network slices.

[0176] Optionally, the random access condition information is index information, which corresponds to at least one reason.

[0177] Optionally, random access condition information can be carried in the MAC PDU;

[0178] Optionally, random access condition information can be carried in the RRC signaling.

[0179] Optionally, random access condition information can be indicated by bits in the new MAC CE in the MAC PDU;

[0180] Optionally, random access condition information can be indicated by reserved bits in the existing MAC CE in the MAC PDU.

[0181] Optionally, the transmitting module 501 is also used for:

[0182] Send the first preamble signal to the network device.

[0183] Optionally, the first preamble signal is a preamble signal corresponding to the two-step random access procedure.

[0184] Optionally, the first preamble and the first PUSCH are carried in message A during the two-step random access process.

[0185] like Figure 6 As shown, an embodiment of the present invention provides a network device, including:

[0186] Receiver module 601 is used to receive the first PUSCH sent by the terminal device;

[0187] The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access.

[0188] The first PUSCH is associated with the first preamble signal.

[0189] Optionally, the random access condition information can also be used to indicate the reason for triggering random access, regardless of the reason.

[0190] Optionally, if the first PUSCH does not carry random access condition information, the first PUSCH indication does not distinguish the reason for triggering random access.

[0191] Optionally, the reasons for triggering random access include at least one of the following:

[0192] Terminal devices transmit small data packets in an inactive state;

[0193] Terminal devices request enhanced coverage;

[0194] The terminal equipment is a simplified version;

[0195] The terminal device triggers random access to at least one network slice.

[0196] Optionally, the random access condition information includes a first indication field, the value of which is used to indicate that the reason for triggering random access is a target reason among at least one reason.

[0197] Optionally, the value of the first indicator field includes a first value and / or a second value;

[0198] The first value indicates that the reason for triggering the random access condition is the target reason among at least one reason, and the second value indicates that the reason for triggering the random access condition is not distinguished.

[0199] Optionally, the random access condition information includes at least one bit; the number of bits in the at least one bit is determined based on the number of network slice groups and / or the number of network slices.

[0200] Optionally, the random access condition information includes at least one bit; the value of the at least one bit includes: a first indication value and a second indication value;

[0201] The first indicator value is used to indicate the reason;

[0202] The second indicator value is used to indicate the reason for triggering random access without distinguishing between them.

[0203] Optionally, the random access condition information includes at least one bit; the value of the at least one bit includes: a first indication value and a second indication value;

[0204] The first indication value is used to instruct the terminal device to trigger at least one network slice for random access;

[0205] The second indicator value is used to indicate network slices that are randomly triggered regardless of the terminal device;

[0206] The number of bits for at least one bit is determined based on the number of network slice groups and / or the number of network slices.

[0207] Optionally, the random access condition information is index information, which corresponds to at least one reason.

[0208] Optionally, random access condition information can be carried in the MAC PDU;

[0209] Random access condition information is indicated by bits in the new MAC CE in the MAC PDU;

[0210] or,

[0211] The reserved bits in the MAC CE of the MAC PDU indicate the random access condition information.

[0212] Optionally, random access condition information can be carried in the RRC signaling.

[0213] Optionally, the receiving module 601 is also used to receive a first preamble signal sent by the terminal device.

[0214] Optionally, the first preamble signal is a preamble signal corresponding to the two-step random access procedure.

[0215] Optionally, the first preamble and the first PUSCH are carried in message A during the two-step random access process.

[0216] This invention also provides a terminal device, including: a memory storing executable program code;

[0217] A processor coupled to memory;

[0218] The processor calls the executable program code stored in the memory to execute the random access condition reporting method executed by the terminal device in this embodiment of the invention.

[0219] This invention also provides a network device, including: a memory storing executable program code;

[0220] A processor coupled to memory;

[0221] The processor calls the executable program code stored in the memory to execute the random access condition reporting method executed by the network device in this embodiment of the invention.

[0222] For example, such as Figure 7 As shown, the network device in this embodiment of the invention can be a base station, which includes: a receiver 701, a transmitter 702 and a processor 703;

[0223] Receiver 701 is used to receive the first PUSCH sent by the terminal device;

[0224] The first PUSCH carries random access condition information, which is used to indicate at least one reason for triggering random access.

[0225] The first PUSCH is associated with the first preamble signal.

[0226] Optionally, random access condition information is used to indicate the reason for triggering random access without distinguishing between them.

[0227] Optionally, if the first PUSCH does not carry random access condition information, the first PUSCH indication does not distinguish the reason for triggering random access.

[0228] Optionally, the reason for triggering random access includes at least one of the following: the terminal device is transmitting small data packets in an inactive state;

[0229] Terminal devices request enhanced coverage;

[0230] The terminal equipment is a simplified version;

[0231] The terminal device triggers random access to at least one network slice.

[0232] Optionally, the random access condition information includes a first indication field, the value of which is used to indicate that the reason for triggering random access is a target reason among at least one reason.

[0233] Optionally, the value of the first indicator field includes a first value and / or a second value;

[0234] The first value indicates that the reason for triggering the random access condition is the target reason among at least one reason, and the second value indicates that the reason for triggering the random access condition is not distinguished.

[0235] Optionally, the random access condition information includes at least one bit; the number of bits in the at least one bit is determined based on the number of network slice groups and / or the number of network slices.

[0236] Optionally, the random access condition information includes at least one bit; the value of the at least one bit includes: a first indication value and a second indication value;

[0237] The first indicator value is used to indicate the reason;

[0238] The second indicator value is used to indicate the reason for triggering random access without distinguishing between them.

[0239] Optionally, the random access condition information includes at least one bit; the value of the at least one bit includes: a first indication value and a second indication value;

[0240] The first indication value is used to instruct the terminal device to trigger at least one network slice for random access;

[0241] The second indicator value is used to indicate network slices that are randomly triggered regardless of the terminal device;

[0242] The number of bits for at least one bit is determined based on the number of network slice groups and / or the number of network slices.

[0243] Optionally, the random access condition information is index information, which corresponds to at least one reason.

[0244] Optionally, random access condition information can be carried in the MAC PDU;

[0245] Random access condition information is indicated by bits in the new MAC CE in the MAC PDU;

[0246] or,

[0247] The reserved bits in the MAC CE of the MAC PDU indicate the random access condition information.

[0248] Optionally, random access condition information can be carried in the RRC signaling.

[0249] Optionally, receiver 701 is also used to receive a first preamble signal sent by the terminal device.

[0250] Optionally, the first preamble signal is a preamble signal corresponding to the two-step random access procedure.

[0251] Optionally, the first preamble and the first PUSCH are carried in message A during the two-step random access process.

[0252] like Figure 8 The diagram shown is a hardware structure schematic of a terminal device according to an embodiment of the present invention. The terminal device may include components such as a radio frequency (RF) circuit 810, a memory 820, and a processor 830. The RF circuit 810 includes a receiver 811 and a transmitter 812. Those skilled in the art will understand that... Figure 8 The structure of the terminal device shown does not constitute a limitation on the terminal device. It may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0253] RF circuit 810 can be used for receiving and transmitting signals during information transmission or calls. Specifically, it receives downlink information from the base station and processes it with processor 830; additionally, it transmits uplink data to the base station. Typically, RF circuit 810 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier (LNA), and a duplexer. Furthermore, RF circuit 810 can also communicate wirelessly with networks and other devices. The aforementioned wireless communication can use any communication standard or protocol, including but not limited to Global System for Mobile Communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, and Short Message Service (SMS).

[0254] The memory 820 can be used to store software programs and modules. The processor 830 executes various functional applications and data processing of the terminal device by running the software programs and modules stored in the memory 820. The memory 820 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the terminal device (such as audio data, phone book, etc.). In addition, the memory 820 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0255] The processor 830 is the control center, connecting various parts of the terminal device through various interfaces and lines. It performs various functions and processes data by running or executing software programs and / or modules stored in the memory 820, and by calling data stored in the memory 820, thereby providing overall monitoring of the terminal device. Optionally, the processor 830 may include one or more processing units; preferably, the processor 830 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, and the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 830.

[0256] In this embodiment of the invention, transmitter 812 is used to send a first Physical Uplink Shared Channel (PUSCH) to a network device;

[0257] If the first PUSCH carries random access condition information, the random access condition information is used to indicate at least one reason for triggering random access.

[0258] The first PUSCH is associated with the first preamble signal.

[0259] Optionally, the random access condition information is also used to indicate the reason for triggering random access, regardless of the reason.

[0260] Optionally, if the first PUSCH does not carry random access condition information, the first PUSCH indication does not distinguish the reason for triggering random access.

[0261] Optionally, the reasons for triggering random access include at least one of the following:

[0262] Terminal devices transmit small data packets in an inactive state;

[0263] Terminal devices request enhanced coverage;

[0264] The terminal equipment is a simplified version;

[0265] The terminal device triggers random access to at least one network slice.

[0266] Optionally, the random access condition information includes a first indication field, the value of which is used to indicate that the reason for triggering random access is a target reason among at least one reason.

[0267] Optionally, the value of the first indicator field includes a first value and / or a second value;

[0268] The first value indicates that the reason for triggering the random access condition is the target reason among at least one reason, and the second value indicates that the reason for triggering the random access condition is not distinguished.

[0269] Optionally, the random access condition information includes at least one bit; the number of bits in the at least one bit is determined based on the number of network slice groups and / or the number of network slices.

[0270] Optionally, the random access condition information includes at least one bit; the value of the at least one bit includes: a first indication value and a second indication value;

[0271] The first indicator value is used to indicate the reason;

[0272] The second indicator value is used to indicate the reason for triggering random access without distinguishing between them.

[0273] Optionally, the random access condition information includes at least one bit; the value of the at least one bit includes: a first indication value and a second indication value;

[0274] The first indication value is used to instruct the terminal device to trigger at least one network slice for random access;

[0275] The second indicator value is used to indicate network slices that are randomly triggered regardless of the terminal device;

[0276] The number of bits for at least one bit is determined based on the number of network slice groups and / or the number of network slices.

[0277] Optionally, the random access condition information is index information, which corresponds to at least one reason.

[0278] Optionally, random access condition information may be carried in the Media Access Control (MAC) Protocol Data Unit (PDU).

[0279] Optionally, random access condition information can be indicated by bits in the new MAC control unit CE in the MAC PDU;

[0280] Optionally, random access condition information can be indicated by reserved bits in the existing MAC CE in the MAC PDU.

[0281] Optionally, random access condition information can be carried in the RRC signaling.

[0282] Optionally, transmitter 812 is also used for:

[0283] Send the first preamble signal to the network device.

[0284] Optionally, the first preamble signal is a preamble signal corresponding to the two-step random access procedure.

[0285] Optionally, the first preamble and the first PUSCH are carried in message A during the two-step random access process.

[0286] This invention also provides a computer-readable storage medium, including: computer instructions that, when executed on a computer, cause a processor to perform various processes of the terminal device as described in the above method embodiments.

[0287] This invention also provides a computer-readable storage medium, including: computer instructions that, when executed on a computer, cause a processor to perform various processes of the network device as described in the above method embodiments.

[0288] This invention also provides a computer program product, including computer instructions. When the computer program product is run on a computer, the processor executes the computer instructions, causing the processor to perform various processes of the terminal device as described in the above method embodiments.

[0289] This invention also provides a computer program product, including computer instructions. When the computer program product is run on a computer, the processor executes the computer instructions, causing the processor to perform various processes of the network device as described in the above method embodiments.

[0290] This invention also provides a chip coupled to a memory in a terminal device, such that the chip calls program instructions stored in the memory during operation, enabling the terminal device to execute various processes as described in the above method embodiments.

[0291] This invention also provides a chip coupled to a memory in a network device, such that the chip, during operation, calls program instructions stored in the memory, enabling the network device to execute various processes of the network device as described in the above method embodiments.

[0292] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of the present invention is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., a solid-state disk (SSD)).

[0293] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

Claims

1. A method for reporting random access conditions, characterized in that, Applied to terminal devices, including: Send the first Physical Uplink Shared Channel (PUSCH) to the network device; The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access. The first PUSCH is associated with the first preamble signal; The reason for triggering random access indicated by the random access condition information includes at least one of the following reasons: The terminal device transmits small data packets in an inactive state; The terminal device requests enhanced coverage; The terminal device is a simplified terminal; The terminal device triggers random access to at least one network slice; The random access condition information includes a first indication field, the value of which is used to indicate that the reason for triggering random access is the target reason among the at least one reason. The random access condition information includes at least one bit; the number of bits in the at least one bit is determined according to the number of network slice groups and / or the number of network slices, and each network slice group or network slice is indicated by at least one bit. Where the random access condition information contains more than one random access reason, the random access condition information is indicated by a joint encoding method, wherein the joint encoding method is to encode the combination of random access reasons.

2. The method according to claim 1, characterized in that, The value of the first indication field includes a first value and / or a second value; Wherein, the first value is used to indicate that the reason for triggering random access is the target reason among the at least one reason, and the second value is used to indicate that the reason for triggering random access is not distinguished.

3. The method according to claim 1, characterized in that, The random access condition information is index information, and the index information corresponds to the at least one reason.

4. The method according to claim 1, characterized in that, The random access condition information is carried in the Media Access Control (MAC) Protocol Data Unit (PDU). or, The random access condition information is carried in the RRC signaling.

5. The method according to claim 4, characterized in that, The random access condition information is indicated by bits in the new MAC control unit CE in the MAC PDU; or, The random access condition information is indicated by the reserved bits in the MAC CE already present in the MAC PDU.

6. The method according to any one of claims 1 to 5, characterized in that, The method includes: The first preamble signal is sent to the network device.

7. The method according to any one of claims 1 to 5, characterized in that, The first preamble signal is the preamble signal corresponding to the two-step random access procedure.

8. The method according to claim 7, characterized in that, The first preamble and the first PUSCH are carried in message A during the two-step random access process.

9. The method according to any one of claims 1 to 5, characterized in that, If the first PUSCH does not carry the random access condition information, the first PUSCH is used to indicate the reason for triggering random access without distinction.

10. A method for reporting random access conditions, characterized in that, Applied to network devices, including: Receive the first PUSCH sent by the terminal device; The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access. The first PUSCH is associated with the first preamble signal; The reason for triggering random access indicated by the random access condition information includes at least one of the following reasons: The terminal device transmits small data packets in an inactive state; The terminal device requests enhanced coverage; The terminal device is a simplified terminal; The terminal device triggers random access to at least one network slice; The random access condition information includes a first indication field, the value of which is used to indicate that the reason for triggering random access is the target reason among the at least one reason. The random access condition information includes at least one bit; the number of bits in the at least one bit is determined according to the number of network slice groups and / or the number of network slices, and each network slice group or network slice is indicated by at least one bit. Where the random access condition information contains more than one random access reason, the random access condition information is indicated by a joint encoding method, wherein the joint encoding method is to encode the combination of random access reasons.

11. The method according to claim 10, characterized in that, The value of the first indication field includes a first value and / or a second value; Wherein, the first value is used to indicate that the reason for triggering random access is the target reason among the at least one reason, and the second value is used to indicate that the reason for triggering random access is not distinguished.

12. The method according to claim 10, characterized in that, The random access condition information is index information, and the index information corresponds to the at least one reason.

13. The method according to claim 10, characterized in that, The random access condition information is carried in the MAC PDU; or, The random access condition information is carried in the RRC signaling.

14. The method according to claim 13, characterized in that, The random access condition information is indicated by bits in the new MAC CE in the MAC PDU; or, The random access condition information is indicated by the reserved bits in the MAC CE already present in the MAC PDU.

15. The method according to any one of claims 10 to 14, characterized in that, The method includes: Receive the first preamble signal sent by the terminal device.

16. The method according to any one of claims 10 to 14, characterized in that, The first preamble signal is the preamble signal corresponding to the two-step random access procedure.

17. The method according to claim 16, characterized in that, The first preamble and the first PUSCH are carried in message A during the two-step random access process.

18. The method according to any one of claims 10 to 14, characterized in that, If the first PUSCH does not carry the random access condition information, the first PUSCH is used to indicate the reason for triggering random access without distinction.

19. A terminal device, characterized in that, include: A transmitter used to send the first PUSCH to network devices; The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access. The first PUSCH is associated with the first preamble signal; The reason for triggering random access indicated by the random access condition information includes at least one of the following reasons: The terminal device transmits small data packets in an inactive state; The terminal device requests enhanced coverage; The terminal device is a simplified terminal; The terminal device triggers random access to at least one network slice; The random access condition information includes a first indication field, the value of which is used to indicate that the reason for triggering random access is the target reason among the at least one reason. The random access condition information includes at least one bit; the number of bits in the at least one bit is determined according to the number of network slice groups and / or the number of network slices, and each network slice group or network slice is indicated by at least one bit. Where the random access condition information contains more than one random access reason, the random access condition information is indicated by a joint encoding method, wherein the joint encoding method is to encode the combination of random access reasons.

20. The terminal device according to claim 19, characterized in that, The value of the first indication field includes a first value and / or a second value; Wherein, the first value is used to indicate that the reason for triggering random access is the target reason among the at least one reason, and the second value is used to indicate that the reason for triggering random access is not distinguished.

21. The terminal device according to claim 19, characterized in that, The random access condition information is index information, and the index information corresponds to the at least one reason.

22. The terminal device according to claim 19, characterized in that, The random access condition information is carried in the Media Access Control (MAC) Protocol Data Unit (PDU). or, The random access condition information is carried in the RRC signaling.

23. The terminal device according to claim 22, characterized in that, The random access condition information is indicated by bits in the new MAC control unit CE in the MAC PDU; or, The random access condition information is indicated by the reserved bits in the MAC CE already present in the MAC PDU.

24. The terminal device according to any one of claims 19 to 23, characterized in that, The transmitter is used for: The first preamble signal is sent to the network device.

25. The terminal device according to any one of claims 19 to 23, characterized in that, The first preamble signal is the preamble signal corresponding to the two-step random access procedure.

26. The terminal device according to claim 25, characterized in that, The first preamble and the first PUSCH are carried in message A during the two-step random access process.

27. The terminal device according to any one of claims 19 to 23, characterized in that, If the first PUSCH does not carry the random access condition information, the first PUSCH is used to indicate the reason for triggering random access without distinction.

28. A network device, characterized in that, include: Receiver, used to receive the first PUSCH sent by the terminal device; The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access. The first PUSCH is associated with the first preamble signal; The reason for triggering random access indicated by the random access condition information includes at least one of the following reasons: The terminal device transmits small data packets in an inactive state; The terminal device requests enhanced coverage; The terminal device is a simplified terminal; The terminal device triggers random access to at least one network slice; The random access condition information includes a first indication field, the value of which is used to indicate that the reason for triggering random access is the target reason among the at least one reason. The random access condition information includes at least one bit; the number of bits in the at least one bit is determined according to the number of network slice groups and / or the number of network slices, and each network slice group or network slice is indicated by at least one bit. Where the random access condition information contains more than one random access reason, the random access condition information is indicated by a joint encoding method, wherein the joint encoding method is to encode the combination of random access reasons.

29. The network device according to claim 28, characterized in that, The value of the first indication field includes a first value and / or a second value; Wherein, the first value is used to indicate that the reason for triggering random access is the target reason among the at least one reason, and the second value is used to indicate that the reason for triggering random access is not distinguished.

30. The network device according to claim 28, characterized in that, The random access condition information is index information, and the index information corresponds to the at least one reason.

31. The network device according to claim 28, characterized in that, The random access condition information is carried in the MAC PDU; or, The random access condition information is carried in the RRC signaling.

32. The network device according to claim 31, characterized in that, The random access condition information is indicated by bits in the new MAC CE in the MAC PDU; or, The random access condition information is indicated by the reserved bits in the MAC CE already present in the MAC PDU.

33. The network device according to any one of claims 28 to 32, characterized in that, The receiver is also configured to receive the first preamble signal sent by the terminal device.

34. The network device according to any one of claims 28 to 32, characterized in that, The first preamble signal is the preamble signal corresponding to the two-step random access procedure.

35. The network device according to claim 34, characterized in that, The first preamble and the first PUSCH are carried in message A during the two-step random access process.

36. The network device according to any one of claims 28 to 32, characterized in that, If the first PUSCH does not carry the random access condition information, the first PUSCH is used to indicate the reason for triggering random access without distinction.

37. A terminal device, characterized in that, include: The transmitting module is used to transmit the first physical uplink shared channel (PUSCH) to the network device; The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access. The first PUSCH is associated with the first preamble signal; The reason for triggering random access indicated by the random access condition information includes at least one of the following reasons: The terminal device transmits small data packets in an inactive state; The terminal device requests enhanced coverage; The terminal device is a simplified terminal; The terminal device triggers random access to at least one network slice; The random access condition information includes a first indication field, the value of which is used to indicate that the reason for triggering random access is the target reason among the at least one reason. The random access condition information includes at least one bit; the number of bits in the at least one bit is determined according to the number of network slice groups and / or the number of network slices, and each network slice group or network slice is indicated by at least one bit. Where the random access condition information contains more than one random access reason, the random access condition information is indicated by a joint encoding method, wherein the joint encoding method is to encode the combination of random access reasons.

38. A network device, characterized in that, include: The receiving module is used to receive the first PUSCH sent by the terminal device; The first PUSCH carries random access condition information, which is used to indicate the reason for triggering random access. The first PUSCH is associated with the first preamble signal; The reason for triggering random access indicated by the random access condition information includes at least one of the following reasons: The terminal device transmits small data packets in an inactive state; The terminal device requests enhanced coverage; The terminal device is a simplified terminal; The terminal device triggers random access to at least one network slice; The random access condition information includes a first indication field, the value of which is used to indicate that the reason for triggering random access is the target reason among the at least one reason. The random access condition information includes at least one bit; the number of bits in the at least one bit is determined according to the number of network slice groups and / or the number of network slices, and each network slice group or network slice is indicated by at least one bit. Where the random access condition information contains more than one random access reason, the random access condition information is indicated by a joint encoding method, wherein the joint encoding method is to encode the combination of random access reasons.

39. A computer-readable storage medium comprising: Computer instructions, when executed on a computer, cause a processor to perform the method as described in any one of claims 1 to 9, or the method as described in any one of claims 10 to 18.

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