Random access method and apparatus, terminal device, network device

Abstract

The embodiment of the application provides a random access method and device, a terminal device and a network device, and the method comprises the following steps: a terminal device acquires a trigger cause of random access; the terminal device determines random access parameters and / or wireless resources corresponding to the trigger cause; and the terminal device performs random access based on the random access parameters and / or the wireless resources.

Description

Technical Field

[0001] This application relates to the field of mobile communication technology, specifically to a random access method and apparatus, terminal equipment, and network equipment. Background Technology

[0002] The three major application scenarios of 5G (5th Generation Mobile Communication Technology) include enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), and ultra-reliable low-latency communication (uRLLC), which place demands on 5G terminals for higher throughput, lower latency, higher reliability, and lower power consumption. To address this, the 3rd Generation Partnership Project (3GPP) introduced new wireless communication technologies in Release 17 (Rel-17) of its standardization process, such as uplink coverage enhancement technology, reduced capability UE (RedCap UE) technology, small data transmission (SDT) technology, and network slicing technology.

[0003] In practical applications, different wireless communication technologies have different requirements for random access. Therefore, ensuring the smooth execution of random access procedures triggered by different wireless communication technologies is an urgent problem to be solved. Summary of the Invention

[0004] This application provides a random access method and apparatus, a terminal device, and a network device.

[0005] This application provides a random access method, the method comprising:

[0006] The triggering reason for the terminal device to obtain random access;

[0007] The terminal device determines the random access parameters and / or wireless resources corresponding to the triggering reason;

[0008] The terminal device performs random access based on the random access parameters and / or the wireless resources.

[0009] This application provides a random access method, the method comprising:

[0010] The network device sends configuration information to the terminal device; the configuration information is used for a first mapping relationship and / or a second mapping relationship, the first mapping relationship is used to characterize the association between the triggering reason for random access and the random access parameters, and the second mapping relationship is used to characterize the association between the triggering reason for random access and the radio resources.

[0011] This application provides a random access device for use in a terminal device, the device comprising:

[0012] The acquisition unit is configured to acquire the trigger reason for random access;

[0013] The first determining unit is configured to determine random access parameters and / or wireless resources corresponding to the triggering reason;

[0014] The processing unit is configured to perform random access based on the random access parameters and / or radio resources.

[0015] This application provides a random access device applied to a network device, the device comprising:

[0016] The sending unit is configured to send configuration information to the terminal device; the configuration information is used to configure a first mapping relationship and / or a second mapping relationship, wherein the first mapping relationship is used to characterize the association between the triggering reason for random access and the random access parameters, and the second mapping relationship is used to characterize the association between the triggering reason for random access and the radio resources.

[0017] The terminal device provided in this application includes a processor and a memory. The memory stores computer programs, and the processor calls and runs the computer programs stored in the memory to execute the random access method described above.

[0018] The network device provided in this application includes a processor and a memory. The memory stores computer programs, and the processor calls and runs the computer programs stored in the memory to execute the random access method described above.

[0019] The chip provided in this application embodiment is used to implement the above-described random access method.

[0020] Specifically, the chip includes a processor for retrieving and running a computer program from memory, causing a device equipped with the chip to perform the aforementioned random access method.

[0021] The computer-readable storage medium provided in this application embodiment is used to store a computer program that causes a computer to execute the above-described random access method.

[0022] The computer program product provided in this application includes computer program instructions that cause a computer to execute the above-described random access method.

[0023] The computer program provided in this application embodiment, when run on a computer, causes the computer to execute the above-described random access method.

[0024] In the random access method provided in this application embodiment, the terminal device obtains the triggering reason for random access; the terminal device determines the random access parameters and / or radio resources corresponding to the triggering reason; the terminal device performs random access based on the random access parameters and / or radio resources. That is, in this application, the terminal device can record the triggering reason for random access. Thus, during the random access process, the terminal device can fully consider the triggering reason and select random access parameters and random access radio resources that match the recorded random access triggering reason to execute the random access process. This ensures that terminal devices with different random access triggering reasons can successfully complete the random access process, improving the success rate of random access. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0026] Figure 1 This is a schematic diagram illustrating an application scenario of an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the four-step random access method in related technologies;

[0028] Figure 3 This is a schematic diagram of the two-step random access method in related technologies;

[0029] Figure 4 This is a flowchart illustrating the random access method provided in the embodiments of this application. Figure 1 ;

[0030] Figure 5 This is a flowchart illustrating the random access method provided in the embodiments of this application. Figure 2 ;

[0031] Figure 6 This is a flowchart illustrating the random access method provided in the embodiments of this application. Figure 3 ;

[0032] Figure 7 This is a schematic diagram of the structural composition of the random access device provided in the embodiments of this application. Figure 1 ;

[0033] Figure 8 This is a schematic diagram of the structural composition of the random access device provided in the embodiments of this application. Figure 2 ;

[0034] Figure 9 This is a schematic structural diagram of a communication device provided in an embodiment of this application;

[0035] Figure 10 This is a schematic structural diagram of the chip according to an embodiment of this application;

[0036] Figure 11 This is a schematic block diagram of a communication system provided in an embodiment of this application. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0038] Figure 1 This is a schematic diagram of an application scenario according to an embodiment of this application.

[0039] like Figure 1 As shown, the communication system 100 may include a terminal device 110 and a network device 120. The network device 120 can communicate with the terminal device 110 via an air interface. Multi-service transmission is supported between the terminal device 110 and the network device 120.

[0040] It should be understood that the embodiments of this application are only illustrated by way of example with communication system 100, but the embodiments of this application are not limited thereto. That is to say, the technical solutions of the embodiments of this application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Internet of Things (IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine-Type Communications (eMTC) system, 5G communication system (also known as New Radio (NR) communication system), or future communication systems, etc.

[0041] exist Figure 1 In the communication system 100 shown, network device 120 can be an access network device that communicates with terminal device 110. The access network device can provide communication coverage for a specific geographical area and can communicate with terminal device 110 (e.g., UE) located within that coverage area.

[0042] Network device 120 may be an evolved Node B (eNB or eNodeB) in a Long Term Evolution (LTE) system, a Next Generation Radio Access Network (NG RAN) device, a base station (gNB) in an NR system, a radio controller in a Cloud Radio Access Network (CRAN), or a relay station, access point, vehicle-mounted device, wearable device, hub, switch, bridge, router, or network device in a future evolved Public Land Mobile Network (PLMN), etc.

[0043] Terminal device 110 can be any terminal device, including but not limited to terminal devices that are connected to network device 120 or other terminal devices via wired or wireless connections.

[0044] For example, the terminal device 110 may refer to an access terminal, user equipment (UE), 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. The access terminal may be a cellular phone, cordless phone, Session Initiation Protocol (SIP) phone, IoT device, satellite handheld terminal, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, terminal device in a 5G network, or terminal device in a future evolved network, etc.

[0045] Terminal device 110 can be used for device-to-device (D2D) communication.

[0046] The wireless communication system 100 may further include a core network device 130 that communicates with the base station. This core network device 130 may be a 5G core network (5G Core, 5GC) device, such as an Access and Mobility Management Function (AMF), an Authentication Server Function (AUSF), a User Plane Function (UPF), or a Session Management Function (SMF). Optionally, the core network device 130 may also be an Evolved Packet Core (EPC) device for an LTE network, such as a Session Management Function + Core Packet Gateway (SMF+PGW-C) device. It should be understood that SMF+PGW-C can simultaneously implement the functions of both SMF and PGW-C. During network evolution, the aforementioned core network device may also be called by other names, or new network entities may be formed by dividing the core network functions; this embodiment does not limit this.

[0047] The various functional units in the communication system 100 can also establish connections and communicate with each other through the next generation (NG) interface.

[0048] For example, terminal devices establish air interface connections with access network devices through the NR interface for transmitting user plane data and control plane signaling; terminal devices can establish control plane signaling connections with the AMF through NG interface 1 (N1); access network devices, such as next-generation radio access base stations (gNB), can establish user plane data connections with the UPF through NG interface 3 (N3); access network devices can establish control plane signaling connections with the AMF through NG interface 2 (N2); the UPF can establish control plane signaling connections with the SMF through NG interface 4 (N4); the UPF can interact with the data network to exchange user plane data through NG interface 6 (N6); the AMF can establish control plane signaling connections with the SMF through NG interface 11 (N11); and the SMF can establish control plane signaling connections with the PCF through NG interface 7 (N7).

[0049] Figure 1An exemplary embodiment shows a base station, a core network device, and two terminal devices. Optionally, the wireless communication system 100 may include multiple base station devices, and each base station may include other numbers of terminal devices within its coverage area. This application embodiment does not limit this.

[0050] It should be noted that, Figure 1 This application merely illustrates the system to which this application applies; of course, the methods shown in the embodiments of this application can also be applied to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and / or" in this application merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "or" relationship. It should also be understood that "instruction" mentioned in the embodiments of this application can be a direct instruction, an indirect instruction, or an indication of a related relationship. For example, A instructing B can mean that A directly instructs B, for example, B can be obtained through A; it can also mean that A indirectly instructs B, for example, A instructs C, B can be obtained through C; or it can mean that there is a related relationship between A and B. It should also be understood that "correspondence" mentioned in the embodiments of this application can indicate a direct or indirect correspondence between two things, or an related relationship between two things, or a relationship of instruction and being instructed, configuration and being configured, etc. It should also be understood that the "predefined" or "predefined rules" mentioned in the embodiments of this application can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices), and this application does not limit the specific implementation method. For example, predefined can refer to those defined in a protocol. It should also be understood that in the embodiments of this application, the "protocol" can refer to standard protocols in the field of communication, such as the LTE protocol, the NR protocol, and related protocols applied to future communication systems, and this application does not limit this.

[0051] To facilitate understanding of the technical solutions of the embodiments of this application, the relevant technologies of the embodiments of this application are described below. The following relevant technologies are optional solutions and can be combined with the technical solutions of the embodiments of this application in any way, and they all fall within the protection scope of the embodiments of this application.

[0052] Random access is a necessary process for establishing a wireless communication link between terminal devices and network devices. Only after the random access process is completed can the terminal devices and network devices perform regular data transmission and reception.

[0053] In version 15 (Release 15, Rel-15) of the standardization process, a contention-based four-step random access method is supported.

[0054] refer to Figure 2 The flowchart shown is divided into four steps based on a competitive random method.

[0055] The first step is to send the preamble sequence. The terminal device selects the Physical Random Access Channel (PRACH) resource and sends Message1 (Msg1) to the network device on the PRACH resource, and sends the preamble sequence to the network device through Msg1.

[0056] The second step is the random access response. Here, the network device sends a random access message 2 (Message2, Msg2). Specifically, after receiving Msg1, the network device sends a random access response to the terminal device via Msg2. The sending of Msg2 indicates that the network device has received the preamble.

[0057] The third step is to schedule the transmission. Here, the terminal device sends message 3 (Message3, Msg3) to the network device. After correctly receiving Msg2, the terminal device uses the uplink authorized resources indicated by Msg2 to send Msg3.

[0058] The fourth step is contention resolution. Here, the network device sends a random access message 4 (Message4, Msg4) to the terminal device. The network device and the terminal device resolve the conflict using Msg4, thus ending the random access process.

[0059] It should be noted that the contention-based four-step random access method can be initiated by the terminal device or by the network device. Specifically, when the terminal device needs to perform cell handover or when downlink data arrives, the network device can actively request the terminal device to initiate a contention-based random access procedure. In this way, the terminal device can perform random access based on the above four steps.

[0060] To reduce access latency for terminal devices and minimize signaling overhead, the NR system introduced a two-step random access method in Rel-16. (Reference) Figure 3 As shown, the two-step random access includes the following steps.

[0061] The first step involves the terminal device sending Message A (MsgA) to the network device. MsgA includes the preamble transmitted on the PRACH and the payload information transmitted on the Physical Uplink Shared Channel (PUSCH). This payload information may include the content of Msg3 from the four-step random access procedure, such as the terminal device's identification information (UE ID) and the establishment cause value that triggered the random access.

[0062] The second step is for the network device to send message B (Message B, MsgB) to the terminal device.

[0063] After MsgA is transmitted, the terminal device can listen for the random access response from the network device within the configured window. If it receives an indication from the network device that the contention conflict has been successfully resolved in MsgB, the terminal device will end the random access process.

[0064] In some embodiments, if a rollback instruction is received in MsgB, the terminal device performs the transmission of Msg3 and listens for the result of contention resolution. If contention resolution fails after the transmission of Msg3, the terminal device continues the transmission of MsgA.

[0065] Typically, network devices can pre-configure resources for terminal devices to transmit MsgA in the two-step random access method; these are referred to here as MsgA resources. MsgA resources include RACH resources and PUSCH resources. RACH resources can be used to transmit the preamble, while PUSCH resources can be used to transmit the UE ID and establishment cause.

[0066] In some embodiments, the configuration of MsgA resources may include RACH resource configuration and PUSCH resource configuration.

[0067] Specifically, the configuration of RACH resources can include the time-frequency resource configuration of RACH and the configuration of the initial preamble root sequence. Here, the network device can broadcast one initial preamble root sequence in each cell, and the terminal device can obtain the set of preambles available in the cell by cyclic shifting based on the configured initial preamble root sequence.

[0068] In addition, the PUSCH resource configuration in the MsgA resource configuration may include: time offset, the MCS level and transmission block size (TBS) supported by the PUSCH occasion (PO), the time domain resources of the PUSCH, and the frequency domain resources of the PUSCH.

[0069] After introducing the two-step random access method, if the network device is configured with both MsgA resources for two-step random access and RACH resources for four-step random access, for contention-based random access, the terminal device must first select the random access type before performing random access. Specifically, the terminal device can select the random access type based on the Reference Signal Receiving Power (RSRP) measurement result. If the RSRP measurement result is higher than the RSRP threshold configured by the network device, the terminal device uses the two-step random access method for random access; otherwise, the terminal device uses the four-step random access method for random access.

[0070] It is understandable that the random access procedure may include the selection of random access radio resources and the selection of control parameters related to the random access procedure. The random access radio resources and related control parameters selected by the terminal device are used for message sending and receiving, power control, conflict access, fallback mechanisms, and the fallback process from two-step random access to four-step random access, etc., in the subsequent random access procedure.

[0071] With the evolution of communication technologies, 3GPP introduced uplink coverage enhancement technology, RedCap UE technology, SDT technology, network slicing technology, etc. in Rel-17.

[0072] In practical applications, terminal devices using different wireless communication technologies have different requirements for random access. For example, when a terminal device is far from the base station, it needs to enable uplink coverage enhancement technology to perform random access, thus requiring the base station to consider the distance between the terminal device and the base station when sending the random access response. Another example is when a terminal device performs random access within a specific network slice; the base station needs to consider the service priority of the network slice requested by the terminal device.

[0073] Therefore, how to ensure the successful execution of random access procedures triggered by different wireless communication technologies when terminal devices use different wireless communication technologies is an urgent problem to be solved.

[0074] Therefore, embodiments of this application provide the following random access method, which improves the success rate of random access triggered by different wireless communication technologies.

[0075] Figure 4 This is a flowchart illustrating the random access method provided in the embodiments of this application. Figure 1 This method can optionally be applied to Figure 1 The system shown is examples of, but not limited to, this method. It includes the following:

[0076] In step 110, the terminal device obtains the trigger reason for the random access.

[0077] Optionally, the triggering reason for random access can be determined by the communication technology used by the terminal device during the random access process. That is, the triggering reason for random access is related to the communication technology used by the terminal device during the random access process. The communication technology can be uplink coverage enhancement technology, RedCap UE technology, SDT technology, network slicing technology, etc., and this embodiment does not limit the specific technology used.

[0078] For example, the triggering reasons for random access include a first triggering reason and / or a second triggering reason; wherein,

[0079] The first triggering reason indicates that the terminal device uses at least one of the following technologies for random access: uplink coverage enhancement technology, RedCap UE technology, SDT technology, and network slicing technology.

[0080] In other words, the first triggering reason refers to the terminal device using one or more of the above-mentioned uplink coverage enhancement technology, RedCap UE technology, SDT technology, and network slicing technology for random access.

[0081] It should be understood that a first triggering reason is a type of triggering reason, meaning that there can be multiple first triggering reasons. Different first triggering reasons use different of the four wireless communication technologies mentioned above during the random access process. In other words, any combination of the four wireless communication technologies mentioned above can constitute a triggering reason for random access.

[0082] Additionally, a second triggering reason can indicate a common random access triggering reason.

[0083] It should be understood that the common random access triggering reason is that the terminal device did not use the newly introduced communication technology for random access. Here, the newly introduced communication technology includes, but is not limited to, uplink coverage enhancement technology, RedCap UE technology, SDT technology, and network slicing technology. In other words, the second triggering reason corresponds to the traditional random access process in the relevant technologies.

[0084] It should be noted that the first and second triggering reasons are only used to distinguish different triggering reasons, and are not used to limit a specific order or a specific number.

[0085] It should be understood that the terminal device determines the triggering reason for random access based on the actual communication technology it uses, and records and saves the triggering reason for random access.

[0086] Optionally, a first field can be defined in the Media Access Control (MAC) layer protocol, and the value of this first field can be used to indicate the triggering reason for random access. For example, when the value of the first field is 1, it indicates that the triggering reason is that the terminal uses uplink coverage enhancement technology for random access; when the value of the first field is 2, it indicates that the triggering reason is a common random access triggering reason.

[0087] It should be noted that the second triggering reason, as a common random access triggering reason, can be indicated by a value of the first field or by the default value of the first field. That is to say, if there is no corresponding value in the first field, it can indicate that the current triggering reason is a common random access triggering reason.

[0088] In step 120, the terminal device determines the random access parameters and / or radio resources corresponding to the random access triggering reason.

[0089] Optionally, there may be multiple triggering reasons, and different random access triggering reasons correspond to different random access parameters.

[0090] It should be noted that there can be multiple first trigger reasons, and the random access parameters corresponding to different first trigger reasons are also different.

[0091] Step 130: The terminal device performs random access based on random access parameters and / or radio resources.

[0092] It should be understood that in the embodiments of this application, the terminal device can determine the random access parameters and / or radio resources corresponding to the triggering reason during the random access process, and complete the random access process based on the random access parameters and / or radio resources.

[0093] Therefore, in this embodiment, the random access triggering reason can be recorded. This allows the terminal device to fully consider the triggering reason during the random access process and select random access parameters and / or radio resources that match the recorded triggering reason to execute the random access procedure. This ensures that terminal devices with different random access triggering reasons can successfully complete the random access process, improving the success rate of random access.

[0094] Optionally, the above-mentioned random access procedure can be a contention-based random access procedure, which can be initiated by the terminal device or by the network device. This application embodiment does not limit this.

[0095] Optionally, the above-mentioned random access procedure can be a two-step random access procedure. Specifically, the random access procedure may include any one of the following procedures: parameter initialization, MSGA transmission, MSGB reception, and conflict resolution.

[0096] Optionally, the above-described random access procedure can also be a four-step random access procedure. Specifically, the random access procedure may include any one of the following: parameter initialization process related to the four-step random access procedure; MSG1 and / or MSG3 transmission process; MSG2 and / or MSG4 reception process; and conflict resolution process.

[0097] In one possible implementation, the terminal device can determine the random access parameters and / or radio resources corresponding to the triggering cause based on predefined rules.

[0098] Optionally, the terminal device may pre-store a first mapping relationship and / or a second mapping relationship. The first mapping relationship represents the association between the triggering cause of random access and the random access parameters, and the second mapping relationship represents the association between the triggering cause of random access and the radio resources. The terminal device can determine the random access parameters and / or radio resources corresponding to the current triggering cause based on the mapping rules (i.e., predefined rules) of the first mapping relationship and / or the second mapping relationship.

[0099] In another possible implementation, the terminal device can determine the random access parameters and / or radio resources corresponding to the random access triggering reason under the configuration of the network device.

[0100] Optionally, refer to Figure 5 The flowchart of the random access method shown is as follows. Figure 2 Before step 110, the random access method provided in this application further includes:

[0101] Step 100: The terminal device receives configuration information sent by the network device. The configuration information is used to configure a first mapping relationship and / or a second mapping relationship. The first mapping relationship is used to characterize the association between the triggering cause of random access and the random access parameters. The second mapping relationship is used to characterize the association between the triggering cause of random access and the radio resources.

[0102] Correspondingly, in step 120, the terminal device determines the random access parameters and / or radio resources corresponding to the triggering cause, which can be achieved in the following ways:

[0103] The terminal device determines the random access parameters corresponding to the triggering cause based on the first mapping relationship; and / or, the terminal device determines the radio resources corresponding to the triggering cause based on the second mapping relationship.

[0104] Alternatively, network devices can carry configuration information in the SIB or in RRC signaling.

[0105] In one possible implementation, the network device can broadcast an SIB to configure random access parameters corresponding to each random access triggering reason for terminal devices in the idle state. Here, the SIB can be SIBX (where X is an integer greater than or equal to 1). This application does not limit the type of SIB.

[0106] In another possible implementation, the network device can configure the random access parameters corresponding to each random access triggering reason for the terminal device via RRC signaling when the terminal device is in the connected state.

[0107] Optionally, the RRC signaling may be RRC connection reconfiguration information, RRC connection release information, etc., and this application embodiment does not limit this.

[0108] In this embodiment of the application, the random access parameters may include at least one of the following:

[0109] Priority control parameters, first selection threshold, second selection threshold, first parameter, and second parameter.

[0110] The priority control parameters may include modulation and coding scheme (MCS) priority, scaling factor (BI) for backoff time, and power ramping step high priority, etc. This application does not limit these parameters.

[0111] In this embodiment, the first selection threshold is used to select a random access method. The available random access methods include a two-step random access method and a four-step random access method.

[0112] It should be noted that network devices can be configured with both radio resources for two-step random access and four-step random access for a given trigger. In practical applications, when performing random access, the terminal device needs to choose one of the two random access methods to execute the random access procedure.

[0113] Optionally, when a network device configures both radio resources for a two-step random access method and radio resources for a four-step random access method for a certain triggering cause, the network device can also configure a first selection threshold for selecting the random access method for that triggering cause.

[0114] Optionally, the first selection threshold can be the RSRP threshold. Here, the basic process for the terminal device to select a random access method is as follows: if the RSRP measurement of the reference signal by the terminal device is greater than the first selection threshold, the terminal device determines to use a two-step random access method. If the RSRP measurement of the reference signal by the terminal device is less than the first selection threshold, the terminal device uses a four-step random access method. That is, the terminal device can select a two-step random access method to implement the random access process when the channel quality is good, and select a four-step random access method to implement the random access process when the channel quality is poor.

[0115] It should be noted that network devices can configure different first selection thresholds for different triggering reasons. For example, terminal devices using uplink coverage enhancement technology are typically far from the base station, resulting in poor uplink coverage. Therefore, when the triggering reason is that the terminal device uses uplink coverage enhancement technology for random access, the network device can configure a higher first selection threshold for this triggering reason. This ensures that the terminal device using this triggering reason will preferentially use the four-step random access method for random access, thus guaranteeing successful random access for the terminal device.

[0116] It should also be noted that if the network device does not configure a first selection threshold for a certain triggering reason, the terminal device can use the common RSRP threshold as the first selection threshold for that triggering reason. Here, the common RSRP threshold can be the threshold configured by the network device for the second triggering reason (i.e., the common random access triggering reason) to select the random access method. In other words, the common RSRP threshold is the RSRP threshold used in the traditional random access process in related technologies when selecting the random access method.

[0117] In this embodiment of the application, the second selection threshold is used to select the SSB.

[0118] Optionally, the second selection threshold is also the RSRP threshold. It is understood that the terminal device can select one or more SSBs from the network device's synchronization signal burst set for synchronization processing based on the second selection threshold.

[0119] It should be noted that network devices can configure different second selection thresholds for different random access triggering reasons to meet the different requirements of SSB during the random access process.

[0120] In this embodiment, the first parameter is used to determine the preamble sequence set. That is, the first parameter can be a control parameter related to the terminal device selecting the preamble sequence set during random access. The network device can configure different first parameters for different random access triggering reasons to meet the different requirements of different random access triggering reasons for the preamble code during the random access process.

[0121] In this embodiment, the second parameter is used to determine the transmission power. That is, the second parameter can be a control parameter related to the terminal device's determination of transmission power during random access. The network device can configure different second parameters for different random access triggering reasons to meet the different transmission power requirements of different random access triggering reasons during the random access process.

[0122] In this embodiment, the radio resources corresponding to the triggering cause may include radio resources for a two-step random access method and / or radio resources for a four-step random access method. That is, the network device can configure radio resources for a two-step random access method separately for a triggering cause, or it can configure radio resources for a four-step random access method separately for the same triggering cause, or it can configure both radio resources for a four-step random access method and radio resources for a two-step random access method for the same triggering cause simultaneously. This embodiment does not limit this.

[0123] Optionally, the radio resources used for four-step random access may include PRACH resources, preamble sequence resources, etc., and this application embodiment does not limit this.

[0124] Optionally, the radio resources used for two-step random access may include PRACH resources and PUSCH resources for transmitting MSG A, and may also include preamble sequence resources, etc., which are not limited in this embodiment.

[0125] Optionally, the differences in radio resources may include differences in at least one of the time-domain resource location, frequency-domain resource location, and preamble sequence resources of PRACH / PUSCH, which are not limited in this embodiment of the application.

[0126] It should be understood that network devices need to determine the specific triggering reason for random access by the terminal device based on the radio resources selected by the terminal device. Specifically, this involves determining whether the terminal device is using one or a combination of technologies such as uplink coverage enhancement, RedCap UE, SDT, or network slicing. Therefore, network devices can configure different radio resources for different triggering reasons, allowing the network device to determine the triggering reason based on the radio resources used by the terminal device during random access.

[0127] Optionally, the differences in radio resources may include differences in at least one of the time-domain resource location, frequency-domain resource location, and preamble sequence resources of PRACH / PUSCH, which are not limited in this embodiment of the application.

[0128] Therefore, in this embodiment of the application, the network device can configure different random access parameters and / or wireless resources for different random access triggering reasons. In this way, the network device can determine the reason for triggering the random access process based on the random access parameters and / or wireless resources used by the terminal device, and thus provide appropriate services to the terminal device based on the triggering reason. In this way, the special needs of different random access triggering reasons are fully considered, thereby ensuring that random access triggered by different random access triggering reasons can be completed smoothly.

[0129] Based on the foregoing embodiments, refer to Figure 6 The flowchart shown in this application illustrates that, in the random access method provided in this embodiment, the following may be included before step 110:

[0130] Step 140: The terminal device selects a first carrier and a first BWP within the first carrier; the first BWP is used for random access.

[0131] Understandably, before each random access, the terminal device selects the carrier and UL BWP for this random access, thus obtaining the first carrier and the first BWP.

[0132] Optionally, the first carrier may be a UL carrier configured by the network device or a supplementary UL (SUL) carrier configured by the network. This application embodiment does not limit this.

[0133] Optionally, the first BWP is the uplink BWP.

[0134] Furthermore, after determining the carrier and BWP used for this random access, the triggering reason for the random access can be obtained.

[0135] In one possible implementation, the terminal device obtaining the triggering reason for random access in step 110 can be achieved in the following way:

[0136] Step 1101: The terminal device determines the triggering reason as the second triggering reason.

[0137] It should be understood that the random access procedure may include the selection of radio resources and the selection of control parameters required for the random access procedure. The radio resources and related control parameters selected by the terminal equipment are used for message transmission and reception, power control, conflict access, fallback mechanisms, and fallback procedures from two-step random access to four-step random access, etc., in the subsequent random access procedure.

[0138] Optionally, in this embodiment of the application, the terminal device initializes the triggering reason for random access before each random access. That is, the terminal device can initialize the triggering reason to a second triggering reason, namely a common random access triggering reason.

[0139] In one possible implementation, the terminal device obtaining the triggering reason for random access in step 110 can also be achieved in the following way:

[0140] Step 1102: If random access is triggered by the first triggering reason, and the first BWP is configured with radio resources corresponding to the first triggering reason, then the terminal device will determine the triggering reason as the first triggering reason.

[0141] Optionally, after determining the first carrier and the first BWP for this random access, if the current random access is triggered by the first triggering reason, the terminal device can further determine whether the selected first BWP is configured with the radio resources corresponding to the first triggering reason.

[0142] Optionally, if the first BWP includes radio resources corresponding to the first triggering reason, the terminal device can determine the triggering reason as the current first triggering reason. In this way, during subsequent random access procedures, the terminal device can perform random access based on the random access parameters and / or radio resources corresponding to the first triggering reason.

[0143] Optionally, if the first triggering reason is not included in the first BWP, the terminal device can determine the triggering reason as the second triggering reason, that is, continue to use the initialized second triggering reason for random access.

[0144] For example, before this random access, the terminal device initializes the target random access triggering reason to the second triggering reason. Furthermore, this random access process is triggered by the first triggering reason. Based on this, if the first BWP selected by the terminal device includes the radio resource corresponding to the first triggering reason, the terminal device determines the triggering reason as the first triggering reason. If the first BWP selected by the terminal device does not have the radio resource corresponding to the first triggering reason configured, the triggering reason remains the initialized result, i.e., the second triggering reason.

[0145] It should be noted that the first BWP packet is configured with radio resources corresponding to the first triggering reason. This may mean that the first BWP includes radio resources for the two-step random access method corresponding to the first triggering reason, and / or that the first BWP includes radio resources for the four-step random access method corresponding to the first triggering reason. This application embodiment does not limit this.

[0146] Optionally, if the radio resources corresponding to the triggering cause include radio resources for two-step random access, the terminal device may select two-step random access for random access.

[0147] For example, if the radio resources corresponding to the triggering cause only include radio resources for the two-step random access method, then the terminal device can use those radio resources for two-step random access. If the radio resources corresponding to the triggering cause include both radio resources for the two-step random access method and radio resources for the four-step random access method, then the terminal device can select the random access method according to the first selection threshold. The selection of the random access method is detailed above and will not be repeated here for brevity.

[0148] Therefore, if a fallback from a two-step random access method to a four-step random access method occurs during subsequent random access procedures, the terminal device can handle it as follows:

[0149] Method 1: If the terminal device selects a two-step random access method for random access, and then switches the two-step random access method to a four-step random access method, and the first BWP does not include the radio resources for four-step random access corresponding to the triggering reason, then the terminal device determines the triggering reason as the second triggering reason.

[0150] Understandably, if the first BWP selected by the terminal device does not include four-step random access radio resources related to the trigger reason, then the trigger reason will be set to the second trigger reason. In other words, if there are no ideal four-step random access radio resources on the first BWP, the terminal device will fall back to the traditional random access method and use the four-step random access resources configured by the terminal device for the common random access trigger reason to perform random access. This ensures the successful execution of the random access process.

[0151] Method 2: If the terminal device selects a two-step random access method for random access, and then switches the two-step random access method to a four-step random access method, and the first BWP is configured with the radio resources corresponding to the trigger reason for the four-step random access, then the trigger reason is retained.

[0152] Understandably, if the first BWP selected by the terminal device includes four-step random access radio resources related to the trigger cause, then the trigger cause remains unchanged. In this way, the terminal device can use ideal four-step random access radio resources for random access, improving the success rate of random access.

[0153] Optionally, if the radio resources corresponding to the triggering reason include radio resources for the four-step random access method, the terminal device may select the four-step random access method to perform random access.

[0154] For example, if the radio resources corresponding to the triggering cause only include radio resources for the four-step random access method, then the terminal device can use those radio resources for two-step random access. If the radio resources corresponding to the triggering cause include both radio resources for the two-step random access method and radio resources for the four-step random access method, then the terminal device can select the random access method according to the first selection threshold. The selection of the random access method is detailed above and will not be repeated here for brevity.

[0155] Optionally, if the terminal device selects the four-step random access method for random access and the random access fails, the terminal device will determine the triggering reason as the second triggering reason.

[0156] Understandably, if a terminal device fails to access the network using the four-step random access method, it can identify the triggering cause as the secondary triggering cause. In other words, if the terminal device fails to access the radio resources corresponding to the four-step random access method, it will fall back to the traditional random access method and use the four-step random access resources configured for that method. This ensures the successful execution of the random access process.

[0157] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solutions of this application, and these simple modifications all fall within the protection scope of this application. For example, the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this application will not describe the various possible combinations separately. Furthermore, various different embodiments of this application can also be arbitrarily combined, as long as they do not violate the spirit of this application, they should also be considered as the content disclosed in this application. Moreover, without conflict, the various embodiments and / or the technical features in the various embodiments described in this application can be arbitrarily combined with the prior art, and the resulting technical solutions should also fall within the protection scope of this application.

[0158] It should also be understood that in the various method embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. Furthermore, in the embodiments of this application, the terms "downlink," "uplink," and "sidelink" are used to indicate the transmission direction of signals or data. "Downlink" indicates that the transmission direction of signals or data is a first direction from the site to the user equipment in the cell; "uplink" indicates that the transmission direction of signals or data is a second direction from the user equipment in the cell to the site; and "sidelink" indicates that the transmission direction of signals or data is a third direction from user equipment 1 to user equipment 2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. Additionally, in the embodiments of this application, the term "and / or" is merely a description of the association relationship between related objects, indicating that three relationships can exist. Specifically, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0159] Figure 7 This is a schematic diagram of the structural composition of the random access device provided in the embodiments of this application. Figure 1 Applied to terminal devices, such as Figure 7 As shown, the random access device includes:

[0160] Acquisition unit 701 is configured to acquire the trigger reason for random access;

[0161] The first determining unit 702 is configured to determine random access parameters and / or wireless resources corresponding to the triggering reason;

[0162] Processing unit 703 is configured to perform random access based on the random access parameters and / or radio resources.

[0163] Optionally, the triggering reason is a first triggering reason and / or a second triggering reason; wherein,

[0164] The first triggering reason indicates that the terminal device uses at least one of the following technologies for random access:

[0165] Uplink coverage enhancement technology, low-capacity terminal device technology, small data packet transmission technology, and network slicing technology;

[0166] The second triggering reason is used to indicate a common random access triggering reason.

[0167] Optionally, the target random access parameters include at least one of the following:

[0168] Priority control parameters, first selection threshold, second selection threshold, first parameter, and second parameter;

[0169] Wherein, the first selection threshold is used to select the random access mode; the second selection threshold is used to select the synchronization signal block (SSB); the first parameter is used to determine the preamble sequence set; and the second parameter is used to determine the transmit power.

[0170] Optionally, the random access method includes: a two-step random access method and a four-step random access method.

[0171] Optionally, the radio resources include: radio resources for a two-step random access method, and / or, radio resources for a four-step random access method.

[0172] Optionally, the random access device further includes:

[0173] The selection unit is configured to select a first carrier and a first uplink bandwidth portion (ULBWP) of the first carrier; the first UL BWP is used for random access.

[0174] Optionally, the random access device further includes:

[0175] The second determining unit is configured such that if random access is triggered by a first triggering reason, and the first BWP is configured with wireless resources corresponding to the first triggering reason, then the terminal device determines the triggering reason as the first triggering reason.

[0176] Optionally, the second determining unit is further configured to determine the triggering cause as a second triggering cause.

[0177] Optionally, the second determining unit is specifically configured such that, when the terminal device selects a two-step random access method for random access, if the terminal device switches the two-step random access method to a four-step random access method, and the first BWP does not have radio resources for four-step random access corresponding to the triggering reason, then the terminal device determines the triggering reason as the second triggering reason.

[0178] Optionally, the second determining unit is specifically configured to, when the terminal device selects a two-step random access method for random access, if the terminal device switches the two-step random access method to a four-step random access method, and the first BWP is configured with radio resources for four-step random access corresponding to the triggering reason, then the triggering reason is retained.

[0179] Optionally, the second determining unit is specifically configured such that if the terminal device selects the four-step random access method for random access and the random access fails, the terminal device determines the triggering reason as the second triggering reason.

[0180] Optionally, the random access parameter determination device further includes:

[0181] The receiving unit is configured to receive configuration information; the configuration information is used to configure a first mapping relationship and / or a second mapping relationship, wherein the first mapping relationship is used to characterize the association between the triggering cause and the random access parameters, and the second mapping relationship is used to characterize the association between the triggering cause and the radio resources;

[0182] The first determining unit is configured such that the terminal device determines the random access parameters corresponding to the triggering cause based on the first mapping relationship, and / or the terminal device determines the radio resources corresponding to the triggering cause based on the second mapping relationship.

[0183] Optionally, the configuration information is carried in the System Information Block (SIB), or the configuration information is carried in the Radio Resource Control (RRC) signaling.

[0184] Figure 8 This is a schematic diagram of the structural composition of the random access device provided in the embodiments of this application. Figure 2 Applied to network devices, such as Figure 8 As shown, the random access device includes:

[0185] The sending unit 801 is configured to send configuration information to the terminal device; the configuration information is used to configure a first mapping relationship and / or a second mapping relationship, wherein the first mapping relationship is used to characterize the association between the triggering reason for random access and the random access parameters, and the second mapping relationship is used to characterize the association between the triggering reason for random access and the radio resources.

[0186] Optionally, the plurality of random access triggering reasons include a first triggering reason and / or a second triggering reason; wherein,

[0187] The first triggering reason indicates that the terminal device uses at least one of the following technologies for random access:

[0188] Coverage enhancement technology, low-capacity terminal device technology, small data packet transmission technology, and network slicing technology;

[0189] The second triggering reason is used to indicate a common random triggering reason.

[0190] Optionally, the random access parameters include at least one of the following:

[0191] Priority control parameters, first selection threshold, second selection threshold, first parameter, and second parameter;

[0192] Wherein, the first selection threshold is used to select the random access mode; the second selection threshold is used to select the synchronization signal block (SSB); the first parameter is used to determine the selection parameters of the preamble sequence set; and the second parameter is used to determine the transmit power.

[0193] Optionally, the random access method includes: a two-step random access method and a four-step random access method.

[0194] Optionally, the radio resources include: radio resources for a two-step random access method, and / or, radio resources for a four-step random access method.

[0195] Optionally, the configuration information is carried in the System Information Block (SIB), or the configuration information is carried in the Radio Resource Control (RRC) signaling.

[0196] Those skilled in the art should understand that the description of the random access device in the embodiments of this application can be understood with reference to the description of the random access method in the embodiments of this application.

[0197] Figure 9 This is a schematic structural diagram of a communication device 900 provided in an embodiment of this application. This communication device can be a terminal device or a network device. Figure 9 The communication device 900 shown includes a processor 910, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0198] Optionally, such as Figure 9 As shown, the communication device 900 may further include a memory 920. The processor 910 can retrieve and run computer programs from the memory 920 to implement the methods described in this embodiment.

[0199] The memory 920 can be a separate device independent of the processor 910, or it can be integrated into the processor 1810.

[0200] Optionally, such as Figure 9 As shown, the communication device 1900 may also include a transceiver 930, which the processor 910 can control to communicate with other devices. Specifically, it can send information or data to other devices or receive information or data sent by other devices.

[0201] The transceiver 930 may include a transmitter and a receiver. The transceiver 930 may further include antennas, and the number of antennas may be one or more.

[0202] Optionally, the communication device 900 may specifically be a network device in the embodiments of this application, and the communication device 900 may implement the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0203] Optionally, the communication device 900 may specifically be a mobile terminal / terminal device in the embodiments of this application, and the communication device 900 may implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0204] Figure 10 This is a schematic structural diagram of the chip according to an embodiment of this application. Figure 10 The chip 1000 shown includes a processor 1010, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0205] Optionally, such as Figure 10 As shown, chip 1000 may further include memory 1020. Processor 1010 can retrieve and run computer programs from memory 1020 to implement the methods described in this embodiment.

[0206] The memory 1020 can be a separate device independent of the processor 1010, or it can be integrated into the processor 1010.

[0207] Optionally, the chip 1000 may also include an input interface 1030. The processor 1010 can control the input interface 1030 to communicate with other devices or chips, specifically, to acquire information or data sent by other devices or chips.

[0208] Optionally, the chip 1000 may also include an output interface 1040. The processor 1010 can control the output interface 1040 to communicate with other devices or chips, specifically, to output information or data to other devices or chips.

[0209] Optionally, the chip can be applied to the network device in the embodiments of this application, and the chip can implement the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0210] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of this application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0211] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0212] Figure 11 This is a schematic block diagram of a communication system 1100 provided in an embodiment of this application. Figure 11 As shown, the communication system 1100 includes a terminal device 1110 and a network device 1120.

[0213] The terminal device 1110 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1120 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, these will not be elaborated here.

[0214] It should be understood that the processor in the embodiments of this application may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0215] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0216] It should be understood that the above-described memory is exemplary and not a limiting description. For example, the memory in the embodiments of this application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DR RAM), etc. That is to say, the memory in the embodiments of this application is intended to include, but is not limited to, these and any other suitable types of memory.

[0217] This application also provides a computer-readable storage medium for storing computer programs.

[0218] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of this application, and the computer program causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0219] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of this application, and the computer program causes the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0220] This application also provides a computer program product, including computer program instructions.

[0221] Optionally, the computer program product can be applied to the network device in the embodiments of this application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, they will not be described in detail here.

[0222] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of this application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, they will not be described in detail here.

[0223] This application also provides a computer program.

[0224] Optionally, the computer program can be applied to the network device in the embodiments of this application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0225] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of this application. When the computer program is run on a computer, it causes the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0226] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0227] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0228] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0229] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0230] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0231] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0232] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A random access method, the method comprising: The triggering reason for the terminal device to obtain random access; The terminal device determines the random access parameters and / or wireless resources corresponding to the triggering reason; The terminal device performs random access based on the random access parameters and / or the wireless resources; The triggering reasons include a first triggering reason and / or a second triggering reason; The first triggering reason indicates that the terminal device uses at least one of the following technologies for random access: uplink coverage enhancement technology, low-capability terminal device technology, small packet transmission technology, and network slicing technology; the second triggering reason is used to indicate a common random access triggering reason; Before the terminal device obtains the trigger reason for random access, it also includes: The terminal device selects a first carrier and a first bandwidth portion (BWP) of the first carrier; the first BWP is used for random access. If the terminal device selects a two-step random access method for random access, and then switches the two-step random access method to a four-step random access method, and the first BWP does not have the radio resources for four-step random access corresponding to the triggering reason configured, then the terminal device determines the triggering reason as the second triggering reason.

2. The method according to claim 1, wherein, The random access parameters include at least one of the following: Priority control parameters, first selection threshold, second selection threshold, first parameter, and second parameter; Wherein, the first selection threshold is used to select the random access mode; the second selection threshold is used to select the synchronization signal block (SSB); the first parameter is used to determine the preamble sequence set; and the second parameter is used to determine the transmit power.

3. The method according to claim 2, wherein, The random access methods include: two-step random access method and four-step random access method.

4. The method according to any one of claims 1-3, wherein, The radio resources include: radio resources for a two-step random access method, and / or radio resources for a four-step random access method.

5. The method according to any one of claims 1-3, wherein, Also includes: If random access is triggered by a first triggering reason, and the first BWP is configured with wireless resources corresponding to the first triggering reason, then the terminal device will determine the triggering reason as the first triggering reason.

6. The method according to any one of claims 1-3, wherein, Also includes: The terminal device determines the triggering reason as the second triggering reason.

7. The method according to any one of claims 1-3, wherein, Also includes: If the terminal device selects a two-step random access method for random access, and then switches the two-step random access method to a four-step random access method, and the first BWP is configured with the radio resources for four-step random access corresponding to the triggering reason, then the triggering reason is retained.

8. The method according to any one of claims 1-3, wherein, Also includes: If the terminal device selects the four-step random access method for random access and the random access fails, the terminal device will determine the triggering reason as the second triggering reason.

9. The method according to any one of claims 1-3, wherein, Also includes: The terminal device receives configuration information; The configuration information is used to configure a first mapping relationship and / or a second mapping relationship. The first mapping relationship is used to characterize the association between the triggering cause and the random access parameters, and the second mapping relationship is used to characterize the association between the triggering cause and the radio resources. The terminal device determines the random access parameters and / or radio resources corresponding to the triggering reason, including: The terminal device determines the random access parameters corresponding to the triggering reason based on the first mapping relationship, and / or the terminal device determines the radio resources corresponding to the triggering reason based on the second mapping relationship.

10. The method according to claim 9, wherein, The configuration information is carried in the System Information Block (SIB), or in the Radio Resource Control (RRC) signaling.

11. A random access method, the method comprising: Network devices send configuration information to terminal devices; The configuration information is used to configure a first mapping relationship and / or a second mapping relationship. The first mapping relationship is used to characterize the association between the triggering reason for random access and the random access parameters. The second mapping relationship is used to characterize the association between the triggering reason for random access and the radio resources. The triggering reason includes a first triggering reason and / or a second triggering reason; The first triggering reason indicates that the terminal device uses at least one of the following technologies for random access: coverage enhancement technology, low-capability terminal device technology, small packet transmission technology, and network slicing technology; the second triggering reason is used to indicate a common random access triggering reason; The method for determining the triggering cause includes: when the terminal device selects a two-step random access method for random access, if the terminal device switches the two-step random access method to a four-step random access method, and the first BWP used by the terminal device for random access does not have the radio resources for four-step random access corresponding to the triggering cause configured, then the terminal device determines the triggering cause as the second triggering cause.

12. The method according to claim 11, wherein, The random access parameters include at least one of the following: Priority control parameters, first selection threshold, second selection threshold, first parameter, and second parameter; Wherein, the first selection threshold is used to select the random access mode; the second selection threshold is used to select the synchronization signal block (SSB); the first parameter is used to determine the selection parameters of the preamble sequence set; and the second parameter is used to determine the transmit power.

13. The method according to claim 12, wherein, The random access methods include: two-step random access method and four-step random access method.

14. The method according to any one of claims 11-13, wherein, The radio resources include: radio resources for a two-step random access method, and / or radio resources for a four-step random access method.

15. The method according to any one of claims 11-13, wherein, The configuration information is carried in the System Information Block (SIB), or in the Radio Resource Control (RRC) signaling.

16. A random access device, applied to a terminal device, the device comprising: The acquisition unit is configured to acquire the trigger reason for random access; The first determining unit is configured to determine the random access parameters and / or radio resources corresponding to the random access triggering reason; The processing unit is configured to perform random access based on the random access parameters and / or the radio resources; The triggering reasons include a first triggering reason and / or a second triggering reason; The first triggering reason indicates that the terminal device uses at least one of the following technologies for random access: uplink coverage enhancement technology, low-capability terminal device technology, small packet transmission technology, and network slicing technology; the second triggering reason is used to indicate a common random access triggering reason; Before the terminal device obtains the trigger reason for random access, it also includes: The acquisition unit is further configured to select a first carrier and a first bandwidth portion (BWP) of the first carrier; the first BWP is used for random access; when the terminal device selects a two-step random access method for random access, if the terminal device switches the two-step random access method to a four-step random access method, and the first BWP does not have the radio resources for four-step random access corresponding to the triggering reason configured, then the terminal device determines the triggering reason as the second triggering reason.

17. A random access parameter determination device, applied to a network device, the device comprising: The sending unit is configured to send configuration information to the terminal device; The configuration information is used to configure the first mapping relationship and / or the second mapping relationship; Wherein, the first mapping relationship is used to characterize the association between the triggering cause of random access and the random access parameters, and the second mapping relationship is used to characterize the association between the triggering cause of random access and the radio resources; The triggering reason includes a first triggering reason and / or a second triggering reason; The first triggering reason indicates that the terminal device uses at least one of the following technologies for random access: coverage enhancement technology, low-capability terminal device technology, small packet transmission technology, and network slicing technology; the second triggering reason is used to indicate a common random access triggering reason; The method for determining the triggering cause includes: when the terminal device selects a two-step random access method for random access, if the terminal device switches the two-step random access method to a four-step random access method, and the first BWP used by the terminal device for random access does not have the radio resources for four-step random access corresponding to the triggering cause configured, then the terminal device determines the triggering cause as the second triggering cause.

18. A terminal device, comprising: A processor and a memory for storing a computer program, the processor for calling and running the computer program stored in the memory to perform the method as described in any one of claims 1 to 10.

19. A network device, comprising: A processor and a memory for storing a computer program, the processor for calling and running the computer program stored in the memory to perform the method as described in any one of claims 11 to 15.

20. A chip, comprising: A processor for retrieving and running a computer program from memory, causing a device on which the chip is mounted to perform the method as described in any one of claims 1 to 10.

21. A chip, comprising: A processor for retrieving and running a computer program from memory, causing a device on which the chip is mounted to perform the method as described in any one of claims 11 to 15.

22. A computer-readable storage medium for storing a computer program that causes a computer to perform the method as claimed in any one of claims 1 to 10.

23. A computer-readable storage medium for storing a computer program that causes a computer to perform the method as described in any one of claims 11 to 15.

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