Random access method and device

Abstract

The disclosed embodiment discloses a random access method and device, which is performed by a first-class terminal, including: a first transmission number is a maximum transmission number of message 1 of the first-class terminal in a four-step random access mode that does not support retransmission of message 3; and the first transmission number is less than a second transmission number of the second-class terminal for four-step random access, and the first-class terminal supports four-step random access with retransmission of message 3. By implementing the disclosed embodiment, the random access delay of the first-class terminal can be shortened and energy consumption can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a random access method and device. Background Art

[0002] In the related art, the first type of terminal that supports the four-step random access with retransmission of message 3 (Msg3) may need to adopt the same four-step random access method as the second type of terminal that does not support the retransmission of message 3, and the corresponding maximum number of transmissions of message 1 (Msg1) during the four-step random access process. Because the network device configures the maximum number of transmissions of message 1 of the four-step random access of the second type of terminal to be relatively large in order to ensure that the second type of terminal can successfully access the cell, this will result in the first type of terminal frequently performing the random access process using the maximum number of times in some scenarios, resulting in a long access time and high energy consumption. Summary of the invention

[0003] The embodiments of the present disclosure provide a random access method and device to at least solve the problems in the related art that the first type of terminal has a long random access time, a large transmission delay, and a large energy consumption.

[0004] In a first aspect, an embodiment of the present disclosure provides a random access method, which is executed by a first type of terminal, including: determining a first transmission number of the first type of terminal; wherein the first transmission number is the maximum transmission number of message 1 of the first type of terminal in a four-step random access mode that does not support retransmission of message 3; and the first transmission number is less than a second transmission number of a second type of terminal for four-step random access, and the first type of terminal supports four-step random access with retransmission of message 3.

[0005] In this technical solution, a first transmission number of a first type of terminal is determined; wherein the first transmission number is the maximum transmission number of message 1 of the first type of terminal in a four-step random access mode that does not support retransmission of message 3; and the first transmission number is less than a second transmission number of a second type of terminal for four-step random access, and the first type of terminal supports four-step random access with retransmission of message 3. Thus, the first type of terminal can avoid initiating too many unnecessary random accesses, shorten the delay of random access, and reduce the energy consumption of the first type of terminal.

[0006] In a second aspect, an embodiment of the present disclosure provides another random access method, which is executed by a network device, including: determining a first transmission number of the first type of terminal; wherein the first transmission number is the maximum transmission number of message 1 of the first type of terminal in a four-step random access mode that does not support retransmission of message 3; and the first transmission number is less than a second transmission number of the second type of terminal for four-step random access, and the first type of terminal supports four-step random access with retransmission of message 3.

[0007] In a third aspect, an embodiment of the present disclosure provides a communication device, which has some or all of the functions of the first type of terminal in the method described in the first aspect above, such as the functions of the communication device may have some or all of the functions in the embodiments of the present disclosure, or may have the functions of implementing any one of the embodiments of the present disclosure alone. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0008] In one implementation, the structure of the communication device may include a processing module, and the processing module is configured to support the communication device to perform the corresponding functions in the above method. The communication device may also include a storage module, which is coupled to the processing module and stores computer programs and data necessary for the communication device.

[0009] As an example, the processing module may be a processor, the transceiver module may be a transceiver or a communication interface, and the storage module may be a memory.

[0010] In one implementation, the communication device includes: a processing module, used to determine the first transmission number of the first type of terminal; wherein the first transmission number is the maximum transmission number of message 1 of the first type of terminal in a four-step random access mode that does not support retransmission of message 3; and the first transmission number is less than the second transmission number of the second type of terminal for four-step random access, and the first type of terminal supports four-step random access with retransmission of message 3.

[0011] In a fourth aspect, an embodiment of the present disclosure provides another communication device, which has some or all of the functions of the network device in the method example described in the second aspect above, such as the functions of the communication device may have some or all of the functions in the embodiments of the present disclosure, or may have the functions of implementing any one of the embodiments of the present disclosure alone. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0012] In one implementation, the structure of the communication device may include a transceiver module and a processing module, and the processing module is configured to support the communication device to perform the corresponding functions in the above method. The transceiver module is used to support communication between the communication device and other devices. The communication device may also include a storage module, which is used to couple with the transceiver module and the processing module, and store the computer programs and data necessary for the communication device.

[0013] In one implementation, the communication device includes: a processing module, used to determine the first transmission number of the first type of terminal; wherein the first transmission number is the maximum transmission number of message 1 of the first type of terminal in a four-step random access mode that does not support retransmission of message 3; and the first transmission number is less than the second transmission number of the second type of terminal for four-step random access, and the first type of terminal supports four-step random access with retransmission of message 3.

[0014] In a fifth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor. When the processor calls a computer program in a memory, the method described in the first aspect is executed.

[0015] In a sixth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor. When the processor calls a computer program in a memory, the method described in the second aspect is executed.

[0016] In a seventh aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the first aspect above.

[0017] In an eighth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the second aspect above.

[0018] In a ninth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in the first aspect above.

[0019] In a tenth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in the second aspect above.

[0020] In the eleventh aspect, an embodiment of the present disclosure provides a communication system, the system comprising the communication device described in the third aspect and the communication device described in the fourth aspect, or the system comprising the communication device described in the fifth aspect and the communication device described in the sixth aspect, or the system comprising the communication device described in the seventh aspect and the communication device described in the eighth aspect, or the system comprising the communication device described in the ninth aspect and the communication device described in the tenth aspect.

[0021] In a twelfth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing instructions for the above-mentioned terminal device, and when the instructions are executed, the terminal device executes the method described in the first aspect.

[0022] In a thirteenth aspect, an embodiment of the present invention provides a readable storage medium for storing instructions used by the above-mentioned network device, and when the instructions are executed, the network device executes the method described in the above-mentioned second aspect.

[0023] In a fourteenth aspect, the present disclosure further provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in the first aspect above.

[0024] In a fifteenth aspect, the present disclosure further provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in the second aspect above.

[0025] In a sixteenth aspect, the present disclosure provides a chip system, which includes at least one processor and an interface, for supporting a terminal device to implement the functions involved in the first aspect, for example, determining or processing at least one of the data and information involved in the above method. In a possible design, the chip system also includes a memory, which is used to store computer programs and data necessary for the terminal device. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0026] In a seventeenth aspect, the present disclosure provides a chip system, which includes at least one processor and an interface, and is used to support a network device to implement the functions involved in the second aspect, for example, determining or processing at least one of the data and information involved in the above method. In a possible design, the chip system also includes a memory, and the memory is used to store computer programs and data necessary for the network device. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0027] In an eighteenth aspect, the present disclosure provides a computer program, which, when executed on a computer, enables the computer to execute the method described in the first aspect.

[0028] In a nineteenth aspect, the present disclosure provides a computer program which, when executed on a computer, enables the computer to execute the method described in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the background technology, the drawings required for use in the embodiments of the present disclosure or the background technology will be described below.

[0030] Figure 1 is an architecture diagram of a communication system provided by an embodiment of the present disclosure;

[0031] Figure 2 is a flow chart of a random access method provided by an embodiment of the present disclosure;

[0032] Figure 3 is a flow chart of another random access method provided by an embodiment of the present disclosure;

[0033] Figure 4 is a flowchart of another random access method provided by an embodiment of the present disclosure;

[0034] Figure 5 is a flowchart of another random access method provided by an embodiment of the present disclosure;

[0035] Figure 6 is a flowchart of another random access method provided by an embodiment of the present disclosure;

[0036] Figure 7 is a flowchart of another random access method provided by an embodiment of the present disclosure;

[0037] Figure 8 is a flowchart of another random access method provided by an embodiment of the present disclosure;

[0038] Fig. 9 is a flowchart of another random access method provided by an embodiment of the present disclosure;

[0039] Fig.10 is a flowchart of another random access method provided by an embodiment of the present disclosure;

[0040] Fig.11 is a flowchart of another random access method provided by an embodiment of the present disclosure;

[0041] Fig.12 is a flowchart of another random access method provided by an embodiment of the present disclosure;

[0042] Fig.13 is a flowchart of another random access method provided by an embodiment of the present disclosure;

[0043] Fig.14 is a flowchart of another random access method provided by an embodiment of the present disclosure;

[0044] Fig.15 is a flowchart of another random access method provided by an embodiment of the present disclosure;

[0045] Fig.16 is a structural diagram of a communication device provided by an embodiment of the present disclosure;

[0046] Fig.17 is a structural diagram of another communication device provided by an embodiment of the present disclosure;

[0047] Fig.18 It is a schematic diagram of the structure of a chip provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0048] In order to better understand a random access method disclosed in an embodiment of the present disclosure, a communication system to which the embodiment of the present disclosure is applicable is first described below.

[0049] See also Figure 1 , Figure 1 The following is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure. The communication system may include but is not limited to a network device and a terminal device. Figure 1 The number and form of devices shown are for illustrative purposes only and do not constitute a limitation on the embodiments of the present disclosure. In actual applications, two or more network devices and two or more terminal devices may be included. Figure 1 The communication system shown includes a network device 101 and a terminal device 102 as an example.

[0050] It should be noted that the technical solutions of the embodiments of the present disclosure can be applied to various communication systems, such as long term evolution (LTE) system, fifth generation (5G) mobile communication system, 5G new radio (NR) system, or other future new mobile communication systems.

[0051] The network device 101 in the embodiment of the present disclosure is an entity for transmitting or receiving signals on the network side. For example, the network device 101 may be an evolved NodeB (eNB), a transmission point (TRP), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system. The embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the network device. The network device provided in the embodiment of the present disclosure may be composed of a centralized unit (CU) and a distributed unit (DU), wherein the CU may also be referred to as a control unit. The CU-DU structure may be used to split the protocol layer of the network device, such as the base station, and the functions of some protocol layers are placed in the CU for centralized control, and the functions of the remaining part or all of the protocol layers are distributed in the DU, and the DU is centrally controlled by the CU.

[0052] The terminal device 102 in the embodiment of the present disclosure is an entity on the user side for receiving or transmitting signals, such as a mobile phone. The terminal device may also be referred to as a terminal device (terminal), user equipment (UE), mobile station (MS), mobile terminal device (MT), etc. The terminal device may be a car with communication function, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), etc. The embodiment of the present disclosure does not limit the specific technology and specific device form adopted by the terminal device.

[0053] It is understandable that the above-mentioned functional devices can be network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (e.g., a cloud platform).

[0054] With the development of technology, in order to adapt to new communication scenarios, a coverage enhancement (CE UE) terminal is proposed. Therefore, there is a scenario where the coverage enhancement terminal (CE UE) and the ordinary terminal (legacy UE) coexist. In the embodiment of the present disclosure, the first type of terminal may be a CE UE, which may use the four-step random access that supports message 3 retransmission or the four-step random access that does not support message 3 retransmission; and the second type of terminal may be a legacy UE; it can only use the four-step random access that does not support message 3 retransmission.

[0055] It should be noted that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution provided by the embodiment of the present disclosure. A person skilled in the art can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by the embodiment of the present disclosure is also applicable to similar technical problems.

[0056] In the related art, a first type of terminal supporting four-step random access with message 3 retransmission selects a certain type of resource when starting to use a four-step random access method that does not support message 3 retransmission for random access; then, in the four-step random access, before the number of transmissions of message 1 reaches the maximum number of transmissions, the type of resource is always used for random access. If the maximum number of transmissions of message 1 in the four-step random access method is used by a second type of terminal that does not support message 3 retransmission for the maximum number of transmissions of the first type of terminal, the first type of terminal may initiate too many unnecessary random accesses, thereby increasing transmission delay and energy consumption.

[0057] Based on this, the embodiments of the present disclosure provide a random access method and device to at least solve the problems in the related art that the first type of terminal has a long random access time, a large transmission delay, and a large energy consumption.

[0058] The random access method and device provided by the present disclosure are described in detail below with reference to the accompanying drawings.

[0059] See also Figure 2 , Figure 2 This is a flowchart of a random access method provided by an embodiment of the present disclosure.

[0060] like Figure 2 As shown, the method is performed by a first-type terminal, and the method may include but is not limited to the following steps:

[0061] S21: Determine the first transmission number of the first category terminal; wherein the first transmission number is the maximum transmission number of message 1 of the first category terminal in the four-step random access mode that does not support retransmission of message 3; and the first transmission number is less than the second transmission number of the second category terminal for four-step random access, and the first category terminal supports four-step random access with retransmission of message 3.

[0062] In the disclosed embodiment, the first type of terminal supports both the four-step random access mode of message 3 retransmission and the four-step random access mode of not supporting message 3 retransmission.

[0063] In the disclosed embodiment, the first type of terminal can work in two modes: four-step random access supporting message 3 retransmission and four-step random access not supporting message 3 retransmission. The first type of terminal can be a CE (coverage enhancement) terminal; the second type of terminal can work in one mode: an ordinary legacy terminal that does not support four-step random access that does not support message 3 retransmission. The first type of terminal can use both four-step random access supporting message 3 retransmission and four-step random access not supporting message 3 retransmission; while the second type of terminal can only use four-step random access that does not support message 3 retransmission.

[0064] In the embodiment of the present disclosure, the first transmission number of the first type of terminal is determined, and the first transmission number of the first type of terminal is the maximum transmission number of message 1 of the first type of terminal in the four-step random access mode that does not support retransmission of message 3. In the embodiment of the present disclosure, the second transmission number of the second type of terminal is the maximum transmission number of message 1 transmission of the second type of terminal for four-step random access. The first transmission number is less than the second transmission number.

[0065] In the disclosed embodiment, the first transmission number of the first type of terminal is less than the second transmission number of the second type of terminal. When the second transmission number of the second type of terminal is larger, the maximum transmission number of the first type of terminal using the four-step random access message 1 transmission that does not support message 3 retransmission is less than the second transmission number of the second type of terminal. Thus, the first type of terminal can avoid initiating too many unnecessary random accesses, shorten the delay of random access, and reduce the energy consumption of the first type of terminal.

[0066] That is, in the related art, when the first type of terminal uses the four-step random access mode that does not support the retransmission of message 3, the maximum number of transmissions of message 1 (that is, the number of repeated transmissions of Msg1) is the second number of transmissions of message 1 when the second type of terminal uses the four-step random access mode that does not support the retransmission of message 3; at this time, the first type of terminal needs to retransmit Msg1 multiple times. In the embodiment of the present disclosure, when the first type of terminal works in the four-step random access mode that does not support the retransmission of message 3; the maximum number of transmissions of its Msg1 is set to the first number of transmissions. Among them, the first number of transmissions is less than the second number of transmissions.

[0067] That is, in the related art, the maximum number of transmissions of Msg.1 when CEUE and LegacyUE work in a four-step random access mode that does not support Msg.3 retransmission is the same. In a possible implementation of the embodiment of the present disclosure, the maximum number of transmissions of Msg.1 when CEUE works in a four-step random access mode that does not support Msg.3 retransmission is less than the maximum number of transmissions of Msg.1 when LegacyUE works in a four-step random access mode that does not support Msg.3 retransmission.

[0068] By implementing the embodiment of the present disclosure, the first transmission number of the first type of terminal is determined; wherein the first transmission number is less than the second transmission number of the second type of terminal for four-step random access, the first type of terminal supports four-step random access with message 3 retransmission, and the first transmission number is the maximum transmission number of the first type of terminal using the four-step random access message 1 transmission that does not support message 3 retransmission. Thus, the first type of terminal can avoid initiating too many unnecessary random accesses, shorten the random access delay, and reduce the energy consumption of the first type of terminal.

[0069] For ease of understanding, the present disclosure uses an example for illustration: illustratively, a first type of terminal performs four-step random access at the center of a cell using a method that does not support retransmission of message 3. During the random access process, the first type of terminal may move to the edge of the cell, and the random access may fail due to uplink coverage, random access response timeout, contention resolution timeout, and other issues. The first type of terminal will retransmit message 1 to initiate random access again until the transmission of message 1 reaches the first transmission number. If the random access still fails, it will switch to a method that supports retransmission of message 3 to perform four-step random access. If the first transmission number set by the CEUE is too large, too many unnecessary random accesses will be initiated. Of course, this scenario is only one of the many scenarios that may be applied to the embodiments of the present disclosure, and the embodiments of the present disclosure are not limited to this.

[0070] See also Figure 3 , Figure 3 It is a flowchart of another random access method provided by an embodiment of the present disclosure.

[0071] like Figure 3 As shown, the method is performed by a first-type terminal, and the method may include but is not limited to the following steps:

[0072] S31: Receive configuration information of the network device.

[0073] S32: Determine a first transmission number according to the configuration information; wherein the first transmission number is the maximum transmission number of message 1 for the first type of terminal in the four-step random access mode that does not support retransmission of message 3; and the first transmission number is less than the second transmission number for the second type of terminal for four-step random access, and the first type of terminal supports four-step random access with retransmission of message 3.

[0074] In the disclosed embodiment, the first type of terminal is a terminal that supports four-step random access with retransmission of message 3. The first type of terminal may be a terminal with CE capability, and the second type of terminal may be an ordinary legacy terminal that does not support four-step random access with retransmission of message 3. The first type of terminal can use both four-step random access that supports retransmission of message 3 and four-step random access that does not support retransmission of message 3; while the second type of terminal can only use four-step random access that does not support retransmission of message 3.

[0075] In the embodiment of the present disclosure, a first transmission number of the first type of terminal is determined, and the first transmission number is the maximum transmission number of the first type of terminal using the four-step random access message 1 transmission that does not support retransmission of message 3. In the embodiment of the present disclosure, the second transmission number is the maximum transmission number of the second type of terminal using the four-step random access that does not support retransmission of message 3 for four-step random access message 1 transmission. The first transmission number is less than the second transmission number.

[0076] In the disclosed embodiment, the first transmission number of the first type of terminal is less than the second transmission number of the second type of terminal. Thus, when the second transmission number corresponding to the second type of terminal is larger, when the first type of terminal uses the four-step random access mode that does not support message 3 retransmission, the maximum transmission number of its message 1 transmission is set to the first transmission number; and the first transmission number is less than the second transmission number. Thus, the first type of terminal can avoid initiating too many unnecessary random accesses, shorten the random access delay, and reduce the energy consumption of the first type of terminal.

[0077] In one possible implementation of the embodiment of the present disclosure, the first type of terminal receives configuration information of the network device, determines the first transmission number according to the configuration information, and the first type of terminal can determine the first transmission number of the first type of terminal through the network device configuration or instruction. In another possible implementation of the embodiment of the present disclosure, the first type of terminal determines the first transmission number according to the communication protocol, and the first type of terminal can determine the first transmission number of the first type of terminal through the network device configuration or instruction. In another possible implementation of the embodiment of the present disclosure, the first type of terminal negotiates with the base station to determine the first transmission number.

[0078] Among them, the configuration information of the network device can directly configure the value of the first transmission number, or can associate the value of the first transmission number with other determined parameters through certain conditions, or can also associate the value of the first transmission number with the values ​​of other synchronously configured parameters through certain conditions, etc. The embodiments of the present disclosure do not impose specific restrictions on this.

[0079] It should be noted that steps S31 and S32 may be implemented separately or in combination with any other step in the embodiments of the present disclosure, for example, in combination with step S21 in the embodiments of the present disclosure, and the embodiments of the present disclosure are not limited to this.

[0080] See also Figure 4 , Figure 4 This is a flowchart of another random access method provided by an embodiment of the present disclosure.

[0081] like Figure 4 As shown, the method is performed by a first-type terminal, and the method may include but is not limited to the following steps:

[0082] S41: Receive configuration information of a network device including a first value of a first transmission number.

[0083] S42: According to the configuration information, determine that the first transmission number is a first value; wherein the first transmission number is the maximum transmission number of message 1 of the first type of terminal in the four-step random access mode that does not support retransmission of message 3; and the first transmission number is less than the second transmission number of the second type of terminal for four-step random access, and the first type of terminal supports four-step random access with retransmission of message 3.

[0084] In the embodiment of the present disclosure, the configuration information of the network device configuration includes a first value of the first transmission number, so that the first transmission number can be determined as the first value according to the configuration information.

[0085] In an exemplary embodiment, the configuration information of the network device configuration includes that the first value of the first transmission number is 10, then the first transmission number can be determined as the first value according to the configuration information, and the first transmission number is 10 times.

[0086] In another exemplary embodiment, the network device and the terminal can determine the identifiers corresponding to multiple candidate first transmission times, and the configuration information only needs to include the identifier. The network device and the terminal can determine the candidate first transmission times and the identifier corresponding to each candidate first transmission time according to the communication standard; or the network device can send each candidate first transmission time and its corresponding identifier to the terminal; or the network device and the terminal are pre-configured with each candidate first transmission time and its corresponding identifier.

[0087] It should be noted that the above examples are for illustration only and are not intended to be specific limitations on the embodiments of the present disclosure. The first value may also be other conditions that meet the requirements, and the embodiments of the present disclosure do not impose specific limitations on this.

[0088] It should be noted that steps S41 and S42 can be implemented separately or in combination with any other step in the embodiments of the present disclosure, for example, in combination with steps S21 and / or S31 and S32 in the embodiments of the present disclosure, and the embodiments of the present disclosure are not limited to this.

[0089] See also Figure 5 , Figure 5 This is a flowchart of another random access method provided by an embodiment of the present disclosure.

[0090] like Figure 5 As shown, the method is performed by a first-type terminal, and the method may include but is not limited to the following steps:

[0091] S51: Receive configuration information of a network device, wherein the configuration information at least includes a second value of a second transmission number and a first parameter value.

[0092] S52: Determine a first transmission number according to the second value and the first parameter value; the first transmission number is the maximum transmission number of message 1 for the first type of terminal in the four-step random access mode that does not support retransmission of message 3; and the first transmission number is less than the second transmission number for the second type of terminal for four-step random access, and the first type of terminal supports four-step random access for retransmission of message 3.

[0093] In the embodiment of the present disclosure, the configuration information of the network device configuration includes a second value of a second transmission number and a first parameter value.

[0094] Among them, the second value of the second transmission number can be any one of 3, 4, 5, 6, 7, 8, 10, 20, 50, 100, and 200. The embodiment of the present disclosure does not impose any specific restrictions on this, and the second value of the second transmission number can be set arbitrarily according to actual usage.

[0095] In the embodiments of the present disclosure, the first parameter value may be a single numerical value, and its value may be arbitrarily set according to actual usage (the base station notifies the UE after setting, or the base station negotiates with the UE), or the first parameter value may be a numerical value selected by the network device from the value range agreed upon in the protocol and notified to the UE, or the first parameter value may be a numerical value determined by the network device and the UE respectively from the agreed value range according to the protocol, etc. The embodiments of the present disclosure do not impose specific restrictions on this.

[0096] In the embodiment of the present disclosure, the first transmission number is determined according to the second value and the first parameter value. A corresponding calculation formula can be set, and the first transmission number can be obtained by calculation according to the second value and the first parameter value and the corresponding calculation formula; or, a table can be looked up based on the second value and the first parameter value to obtain the first transmission number, etc., to determine the first transmission number.

[0097] In some embodiments, the first transmission number is determined as the second value minus the first parameter value; wherein the first parameter value is less than the second value.

[0098] In the embodiment of the present disclosure, the first transmission number is determined as the second value minus the first parameter value, and the first transmission number is the difference between the second value and the first parameter value, wherein the first parameter value is smaller than the second value.

[0099] In an exemplary embodiment, the second value of the second transmission number is 50, the first parameter value is 20, and the first transmission number is determined to be 50 of the second value minus 20 of the first parameter value, so that the first transmission number can be determined to be 30.

[0100] In another exemplary embodiment, the second value of the second transmission number is 50, the first parameter value is 10, and the first transmission number is determined to be 50 of the second value minus 10 of the first parameter value, so that the first transmission number can be determined to be 40.

[0101] It should be noted that the above examples are for illustration only and are not intended to be specific limitations on the embodiments of the present disclosure. The second transmission number and the first parameter value in the embodiments of the present disclosure are not limited to the above values ​​and may be arbitrarily set according to actual usage requirements. The embodiments of the present disclosure do not impose specific limitations on this.

[0102] In some embodiments, the first transmission number is determined as the product of the second value and a first parameter value; wherein the first parameter value is greater than 0 and less than 1.

[0103] In an exemplary embodiment, the second value of the second transmission number is 50, the first parameter value is 0.2, and the first transmission number is determined to be 50 of the second value multiplied by 0.2 of the first parameter value, so that the first transmission number can be determined to be 10.

[0104] In another exemplary embodiment, the second value of the second transmission number is 50, the first parameter value is 0.5, and the first transmission number is determined to be 50 of the second value multiplied by 0.6 of the first parameter value, so that the first transmission number can be determined to be 25.

[0105] In an embodiment of the present disclosure, the first parameter value may be an offset between the first transmission number and the second value, or a scaling factor between the first transmission number and the second value.

[0106] It should be noted that the above examples are for illustration only and are not intended to be specific limitations on the embodiments of the present disclosure. The second transmission number and the first parameter value in the embodiments of the present disclosure are not limited to the above values ​​and may be arbitrarily set according to actual usage requirements. The embodiments of the present disclosure do not impose specific limitations on this.

[0107] It should be noted that steps S51 and S52 can be implemented separately or in combination with any other step in the embodiments of the present disclosure, for example, in combination with steps S21 and / or S31 and S32 and / or S41 and S42 in the embodiments of the present disclosure, and the embodiments of the present disclosure are not limited to this.

[0108] See also Figure 6 , Figure 6 This is a flowchart of another random access method provided by an embodiment of the present disclosure.

[0109] like Figure 6 As shown, the method is performed by a first-type terminal, and the method may include but is not limited to the following steps:

[0110] S61: Receive configuration information of a network device, wherein the configuration information at least includes a third value of a second transmission number.

[0111] S62: Determine a first transmission number according to the third value and a second parameter value determined by the protocol; the first transmission number is the maximum transmission number of message 1 for the first type of terminal in the four-step random access mode that does not support retransmission of message 3; and the first transmission number is less than the second transmission number for the second type of terminal performing four-step random access, and the first type of terminal supports four-step random access with retransmission of message 3.

[0112] In the disclosed embodiment, the configuration information of the network device configuration includes a third value of the second transmission number, and the protocol stipulates a second parameter value.

[0113] Among them, the third value of the second transmission number can be any one of 3, 4, 5, 6, 7, 8, 10, 20, 50, 100, and 200. The embodiment of the present disclosure does not impose any specific restrictions on this, and the third value of the second transmission number can be set arbitrarily according to actual usage.

[0114] In the embodiments of the present disclosure, the second parameter value may be a single numerical value, and its value may be arbitrarily set according to actual usage (the base station notifies the UE after setting, or the base station negotiates with the UE), or the second parameter value may be a numerical value selected by the network device from the value range agreed upon in the protocol and notified to the UE, or the second parameter value may be a numerical value determined by the network device and the UE respectively from the agreed value range according to the protocol, etc. The embodiments of the present disclosure do not impose specific restrictions on this.

[0115] In the embodiment of the present disclosure, the first transmission number is determined according to the third value and the second parameter value. A corresponding calculation formula can be set to calculate the first transmission number according to the third value and the second parameter value, or a table can be looked up based on the third value and the second parameter value to obtain the first transmission number, etc., thereby determining the first transmission number.

[0116] In some embodiments, the first transmission number is determined as a third value minus a second parameter value; wherein the second parameter value is less than the third value.

[0117] In the disclosed embodiment, the first transmission number is determined as the third value minus the second parameter value, and the first transmission number is the difference between the third value and the second parameter value, wherein the second parameter value is smaller than the third value.

[0118] In an exemplary embodiment, the third value of the second transmission number is 50, the second parameter value is 20, and the first transmission number is determined to be 50 of the third value minus 20 of the second parameter value, so that the first transmission number can be determined to be 30.

[0119] In some embodiments, the first transmission number is determined as the product of a third value and a second parameter value; wherein the second parameter value is greater than 0 and less than 1.

[0120] In an exemplary embodiment, the third value of the second transmission number is 50, the second parameter value is 0.4, and the first transmission number is determined to be 50 of the third value multiplied by 0.4 of the second parameter value, so that the first transmission number can be determined to be 20.

[0121] In an embodiment of the present disclosure, the second parameter value may be an offset between the first transmission number and the second value, or a scaling factor between the first transmission number and the second value.

[0122] It should be noted that steps S61 and S62 can be implemented separately or in combination with any other step in the embodiments of the present disclosure, for example, in combination with steps S21 and / or S31 and S32 and / or S41 and S42 in the embodiments of the present disclosure, and the embodiments of the present disclosure are not limited to this.

[0123] See also Figure 7 , Figure 7 This is a flowchart of another random access method provided by an embodiment of the present disclosure.

[0124] like Figure 7 As shown, the method is performed by a first-type terminal, and the method may include but is not limited to the following steps:

[0125] S71: Determine the first transmission number of the first category terminal according to the protocol agreement; the first transmission number is the maximum transmission number of message 1 of the first category terminal in the four-step random access mode that does not support retransmission of message 3; and the first transmission number is less than the second transmission number of the second category terminal for four-step random access, and the first category terminal supports four-step random access with retransmission of message 3.

[0126] Among them, the first transmission number is less than the second transmission number of the second type of terminal for four-step random access, the first type of terminal supports four-step random access with message 3 retransmission, and the first transmission number is the maximum transmission number of the first type of terminal using four-step random access message 1 that does not support message 3 retransmission.

[0127] In the disclosed embodiment, the first type of terminal is a terminal that supports four-step random access with retransmission of message 3. The first type of terminal may be a terminal with CE capability, and the second type of terminal may be an ordinary legacy terminal that does not support four-step random access with retransmission of message 3. The first type of terminal can use both four-step random access that supports retransmission of message 3 and four-step random access that does not support retransmission of message 3; while the second type of terminal can only use four-step random access that does not support retransmission of message 3.

[0128] Among them, in an embodiment of the present disclosure, the first transmission number of the first category terminal is determined, and the first transmission number of the first category terminal is the maximum transmission number of the first category terminal using the four-step random access message 1 transmission that does not support message 3 retransmission. In an embodiment of the present disclosure, the second transmission number of the second category terminal is the maximum transmission number of the second category terminal for the four-step random access message 1 transmission.

[0129] In the disclosed embodiment, the first transmission number of the first type of terminal is less than the second transmission number of the second type of terminal. When the second transmission number of the second type of terminal is larger, the maximum transmission number of the first type of terminal using the four-step random access message 1 transmission that does not support message 3 retransmission is less than the second transmission number of the second type of terminal. Thus, the first type of terminal can avoid initiating too many unnecessary random accesses, shorten the delay of random access, and reduce the energy consumption of the first type of terminal.

[0130] In the embodiment of the present disclosure, the first transmission number of the first type of terminal can be determined according to the agreement. For example, the value of the first transmission number can be agreed upon by the agreement, or the first transmission number can be equal to a known parameter, or the first transmission number can be obtained by a certain calculation method, etc., and the embodiment of the present disclosure does not impose specific restrictions on this.

[0131] In some embodiments, the protocol agreement includes a fourth value of the first transmission number; according to the protocol agreement, the first transmission number is determined to be the fourth value.

[0132] In the embodiment of the present disclosure, the protocol stipulates a fourth value, and the first transmission number is the fourth value, so that the first transmission number can be determined.

[0133] In an exemplary embodiment, the protocol stipulates that the fourth value is 40, and then the first transmission number can be determined to be 40.

[0134] In another exemplary embodiment, the protocol stipulates that the fourth value is 30, and then the first transmission number can be determined to be 30.

[0135] It should be noted that the above examples are for illustration only and are not intended to be specific limitations on the embodiments of the present disclosure. The fourth value in the embodiments of the present disclosure is not limited to the above values ​​and may be arbitrarily set according to actual use requirements. The embodiments of the present disclosure do not impose specific limitations on this.

[0136] It should be noted that step S71 can be implemented alone or in combination with any other step in the embodiments of the present disclosure, for example, in combination with steps S21 and / or S31 and S32 in the embodiments of the present disclosure, and the embodiments of the present disclosure are not limited to this.

[0137] See also Figure 8 , Figure 8 This is a flowchart of another random access method provided by an embodiment of the present disclosure.

[0138] like Figure 8 As shown, the method is performed by a first-type terminal, and the method may include but is not limited to the following steps:

[0139] S81: In response to the first type of terminal performing four-step random access in a manner that does not support retransmission of message 3, the number of message 1 transmissions reaches a first number of transmissions, and random access fails, the first type of terminal switches to a manner that supports retransmission of message 3 to perform four-step random access.

[0140] In the disclosed embodiment, the first type of terminal is a terminal that supports four-step random access with retransmission of message 3. The first type of terminal may be a terminal with CE capability, and the second type of terminal may be an ordinary legacy terminal that does not support four-step random access with retransmission of message 3. The first type of terminal can use both four-step random access that supports retransmission of message 3 and four-step random access that does not support retransmission of message 3; while the second type of terminal can only use four-step random access that does not support retransmission of message 3.

[0141] Among them, in the embodiment of the present disclosure, the first transmission number of the first category terminal is the maximum transmission number of the first category terminal using the four-step random access message 1 that does not support message 3 retransmission, and in the embodiment of the present disclosure, the second transmission number of the second category terminal is the maximum transmission number of the second category terminal for the four-step random access message 1 transmission.

[0142] In the embodiment of the present disclosure, the first transmission number of the first type of terminal is less than the second transmission number of the second type of terminal. When the second transmission number of the second type of terminal is larger, the maximum transmission number of the first type of terminal using the four-step random access message 1 transmission that does not support message 3 retransmission is less than the second transmission number of the second type of terminal.

[0143] In the embodiment of the present disclosure, after determining the first transmission number of the first type of terminal, the first type of terminal uses a method that does not support message 3 retransmission to perform four-step random access. When the message 1 transmission reaches the first transmission number and the random access fails, it switches to a method that supports message 3 retransmission to perform four-step random access. Thus, the first type of terminal can avoid initiating too many unnecessary random accesses and directly switch to a method that supports message 3 retransmission to perform four-step random access, which can shorten the delay of random access and reduce the energy consumption of the first type of terminal.

[0144] Exemplarily, the first type of terminal performs four-step random access in the center of the cell using a method that does not support message 3 retransmission. During the random access process, the first type of terminal may move to the edge of the cell, and the random access may fail due to uplink coverage, random access response timeout, contention resolution timeout, etc. The first type of terminal will retransmit message 1 to initiate random access again until the transmission of message 1 reaches the first transmission number. If the random access still fails, it will switch to a method that supports message 3 retransmission for four-step random access. Since the first transmission number is less than the second transmission number, the first type of terminal can avoid initiating too many unnecessary random accesses and directly switch to a method that supports message 3 retransmission for four-step random access, which can shorten the delay of random access and reduce the energy consumption of the first type of terminal.

[0145] It should be noted that step S81 can be implemented alone or in combination with any other step in the embodiments of the present disclosure, for example, in combination with steps S21 and / or S31 and S32 and / or S41 and S42 and / or S51 and S52 and / or S61 and S62 and / or S71 in the embodiments of the present disclosure, and the embodiments of the present disclosure are not limited to this.

[0146] See also Fig. 9 , Fig. 9 This is a flowchart of another random access method provided by an embodiment of the present disclosure.

[0147] like Fig. 9 As shown, the method is performed by a first-type terminal, and the method may include but is not limited to the following steps:

[0148] S91: When a first type of terminal uses a method that does not support retransmission of message 3 to perform four-step random access, message 1 transmission reaches a first transmission number and random access fails, determine the channel quality; in response to the channel quality being less than a threshold, switch to a method that supports retransmission of message 3 to perform four-step random access.

[0149] In one possible implementation, the channel quality may be determined by measuring the reference signal received power RSRP of the synchronization signal block SSB; when the RSRP is less than a threshold, switching to a mode that supports message 3 retransmission for four-step random access.

[0150] In the disclosed embodiment, the first type of terminal is a terminal that supports four-step random access with retransmission of message 3. The first type of terminal may be a terminal with CE capability, and the second type of terminal may be an ordinary legacy terminal that does not support four-step random access with retransmission of message 3. The first type of terminal can use both four-step random access that supports retransmission of message 3 and four-step random access that does not support retransmission of message 3; while the second type of terminal can only use four-step random access that does not support retransmission of message 3.

[0151] Among them, in the embodiment of the present disclosure, the first transmission number of the first category terminal is the maximum transmission number of the first category terminal using the four-step random access message 1 that does not support message 3 retransmission, and in the embodiment of the present disclosure, the second transmission number of the second category terminal is the maximum transmission number of the second category terminal for the four-step random access message 1 transmission.

[0152] It should be noted that the first type of terminals can use both the four-step random access supporting message 3 retransmission and the four-step random access not supporting message 3 retransmission; while the second type of terminals can only use the four-step random access not supporting message 3 retransmission.

[0153] In the embodiment of the present disclosure, the first transmission number of the first type of terminal is less than the second transmission number of the second type of terminal. When the second transmission number of the second type of terminal is larger, the maximum transmission number of the first type of terminal using the four-step random access message 1 transmission that does not support message 3 retransmission is less than the second transmission number of the second type of terminal.

[0154] In an embodiment of the present disclosure, after determining the first transmission number of the first type of terminal, the first type of terminal uses a method that does not support retransmission of message 3 to perform four-step random access. When the message 1 transmission reaches the first transmission number and the random access fails, the RSRP (reference signal received power) of the SSB (synchronous signal block) is measured; when the RSRP is less than the threshold, switch to a method that supports retransmission of message 3 to perform four-step random access.

[0155] Exemplarily, the first type of terminal performs four-step random access at the center of the cell using a method that does not support retransmission of message 3. During the random access process, the first type of terminal may move to the edge of the cell, and the random access may fail due to problems such as uplink coverage, random access response timeout, contention resolution timeout, etc. The first type of terminal will retransmit message 1 to initiate random access again until the transmission of message 1 reaches the first transmission number, which means that before the transmission of message 1 reaches the first transmission number, the first type of terminal is still unable to achieve random access and cannot realize the request for retransmission of message 3. When the transmission of message 1 reaches the first transmission number and the random access still fails, the RSRP of SSB is measured; when the RSRP is less than the threshold, switch to a method that supports retransmission of message 3 for four-step random access. Therefore, the first type of terminal can avoid initiating too many unnecessary random accesses. Switching to a method that supports retransmission of message 3 for four-step random access can shorten the delay of random access and reduce the energy consumption of the first type of terminal.

[0156] It should be noted that step S91 can be implemented alone or in combination with any other step in the embodiments of the present disclosure, for example, in combination with steps S21 and / or S31 and S32 and / or S41 and S42 and / or S51 and S52 and / or S61 and S62 and / or S71 in the embodiments of the present disclosure, and the embodiments of the present disclosure are not limited to this.

[0157] See also Fig.10 , Fig.10 This is a flowchart of another random access method provided by an embodiment of the present disclosure.

[0158] like Fig.10 As shown, the method is performed by a first-type terminal, and the method may include but is not limited to the following steps:

[0159] S101: When RSRP is greater than or equal to a threshold, random access is performed in a manner that does not support retransmission of message 3 until the transmission of message 1 reaches a second transmission number.

[0160] In the disclosed embodiment, the first type of terminal is a terminal that supports four-step random access with retransmission of message 3. The first type of terminal may be a terminal with CE capability, and the second type of terminal may be an ordinary legacy terminal that does not support four-step random access with retransmission of message 3. The first type of terminal can use both four-step random access that supports retransmission of message 3 and four-step random access that does not support retransmission of message 3; while the second type of terminal can only use four-step random access that does not support retransmission of message 3.

[0161] Among them, in the embodiment of the present disclosure, the first transmission number of the first category terminal is the maximum transmission number of the first category terminal using the four-step random access message 1 that does not support message 3 retransmission, and in the embodiment of the present disclosure, the second transmission number of the second category terminal is the maximum transmission number of the second category terminal for the four-step random access message 1 transmission.

[0162] In the embodiment of the present disclosure, the first transmission number of the first type of terminal is less than the second transmission number of the second type of terminal. When the second transmission number of the second type of terminal is larger, the maximum transmission number of the first type of terminal using the four-step random access message 1 transmission that does not support message 3 retransmission is less than the second transmission number of the second type of terminal.

[0163] In an embodiment of the present disclosure, after determining the first transmission number of the first type of terminal, the first type of terminal performs four-step random access using a method that does not support retransmission of message 3. When the transmission of message 1 reaches the first transmission number and the random access fails, the RSRP of the SSB is measured; when the RSRP is greater than or equal to the threshold, random access is performed using a method that does not support retransmission of message 3 until the transmission of message 1 reaches the second transmission number.

[0164] In the embodiment of the present disclosure, the first transmission number of the first type of terminal and the second transmission number of the second type of terminal are both valid for the first type of terminal.

[0165] In an exemplary embodiment, the first transmission number of the first type of terminal is 10, and the second transmission number of the second type of terminal is 50; when the first type of terminal uses the four-step random access that does not support retransmission of message 3 for random access, if the number of transmissions of message 1 reaches 10 of the first transmission number and the random access is still unsuccessful, then the RSRP is measured. If it is greater than the threshold, the four-step random access that does not support retransmission of message 3 is still used for random access. After reaching the first transmission number of 10 times again, the cumulative transmission of message 1 has been transmitted 20 times using the same type of resources, then the RSRP is measured again. If it is still greater than the threshold, the four-step random access that does not support retransmission of message 3 is still used for random access. This process is repeated until the cumulative transmission number of message 1 in the process reaches 50 times of the second transmission number. If the random access is still unsuccessful, the access failure is declared, indicating that the first type of terminal cannot access the cell.

[0166] It should be noted that step S101 can be implemented alone or in combination with any other step in the embodiments of the present disclosure, for example, in combination with steps S21 and / or S31 and S32 and / or S41 and S42 and / or S51 and S52 and / or S61 and S62 and / or S71 and / or S91 in the embodiments of the present disclosure, and the embodiments of the present disclosure are not limited to this.

[0167] See also Fig.11 , Fig.11 This is a flowchart of another random access method provided by an embodiment of the present disclosure.

[0168] like Fig.11 As shown, the method is performed by a network device, and the method may include but is not limited to the following steps:

[0169] S111: Determine the first transmission number of the first type of terminal; wherein the first transmission number is the maximum transmission number of message 1 of the first type of terminal in the four-step random access mode that does not support message 3 retransmission; and the first transmission number is less than the second transmission number of the second type of terminal for four-step random access, and the first type of terminal supports four-step random access with message 3 retransmission.

[0170] In the embodiment of the present disclosure, the description of S111 can be found in Figure 2 The relevant description of S21 shown is not repeated here.

[0171] See also Fig.12 , Fig.12 This is a flowchart of another random access method provided by an embodiment of the present disclosure.

[0172] like Fig.12 As shown, the method is performed by a network device, and the method may include but is not limited to the following steps:

[0173] S121: Send configuration information to the first type of terminal.

[0174] S122: Determine a first transmission number of the first type of terminal according to the configuration information; wherein the first transmission number is the maximum transmission number of message 1 of the first type of terminal in the four-step random access mode that does not support retransmission of message 3; and the first transmission number is less than a second transmission number of the second type of terminal for four-step random access, and the first type of terminal supports four-step random access with retransmission of message 3.

[0175] In the embodiment of the present disclosure, the description of S111 can be found in Figure 2 The relevant description of S21 shown is not repeated here.

[0176] See also Fig.13 , Fig.13 This is a flowchart of another random access method provided by an embodiment of the present disclosure.

[0177] like Fig.13 As shown, the method is performed by a network device, and the method may include but is not limited to the following steps:

[0178] S131: Send configuration information to a first type of terminal; wherein the configuration information at least includes a first value of a first transmission number.

[0179] S132: Determine that the first transmission number is a first value.

[0180] In the embodiment of the present disclosure, the description of S131 and S132 can be found in Figure 4 The related descriptions of S41 and S42 shown are not repeated here.

[0181] It should be noted that steps S131 and S132 can be implemented separately or in combination with any other step in the embodiments of the present disclosure, for example, in combination with steps S111 and / or S121 and S122 in the embodiments of the present disclosure, and the embodiments of the present disclosure are not limited to this.

[0182] See also Fig.14 , Fig.14 This is a flowchart of another random access method provided by an embodiment of the present disclosure.

[0183] like Fig.14 As shown, the method is performed by a network device, and the method may include but is not limited to the following steps:

[0184] S141: Send configuration information to a first type of terminal; wherein the configuration information at least includes a second value of a second transmission number and a first parameter value.

[0185] S142: Determine a first transmission number according to the second value and the first parameter value.

[0186] In some embodiments, the first transmission number is determined as the second value minus the first parameter value; wherein the first parameter value is less than the second value.

[0187] In some embodiments, the first transmission number is determined as the product of the second value and a first parameter value; wherein the first parameter value is greater than 0 and less than 1.

[0188] In the embodiment of the present disclosure, the description of S141 and S142 can be found in Figure 5 The description of S51 and S52 shown in the figure will not be repeated here. It should be noted that steps S141 and S142 can be implemented separately or in combination with any other steps in the embodiments of the present disclosure, for example, in combination with steps S111 and / or S121 and S112 and / or S121 and S122 and / or S131 and S132 in the embodiments of the present disclosure, and the embodiments of the present disclosure are not limited to this.

[0189] See also Fig.15 , Fig.15 This is a flowchart of another random access method provided by an embodiment of the present disclosure.

[0190] like Fig.15As shown, the method is performed by a network device, and the method may include but is not limited to the following steps:

[0191] S151: Send configuration information to a first category terminal; wherein the configuration information at least includes a third value of a second transmission number.

[0192] S152: Determine a second parameter value according to the third value and the protocol, and determine the first number of transmissions.

[0193] In some embodiments, the first transmission number is determined as a third value minus a second parameter value; wherein the second parameter value is less than the third value.

[0194] In some embodiments, the first transmission number is determined as the product of a third value and a second parameter value; wherein the second parameter value is greater than 0 and less than 1.

[0195] In the embodiment of the present disclosure, the description of S151 and S152 can be found in Figure 6 The description of S61 and S62 shown in the figure will not be repeated here. It should be noted that steps S151 and S152 can be implemented separately or in combination with any other steps in the embodiment of the present disclosure, for example, in combination with steps S111 and / or S121 and S112 and / or S121 and S122 and / or S131 and S132 in the embodiment of the present disclosure, and the embodiment of the present disclosure does not limit this.

[0196] In the above embodiments provided by the present disclosure, the methods provided by the embodiments of the present disclosure are introduced from the perspectives of the network device and the first type of terminal. In order to implement the functions in the methods provided by the above embodiments of the present disclosure, the network device and the first type of terminal may include a hardware structure and a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. One of the above functions may be executed in the form of a hardware structure, a software module, or a hardware structure plus a software module.

[0197] See also Fig.16 , which is a structural diagram of a communication device 70 provided in an embodiment of the present disclosure. Fig.16 The communication device 70 shown may include a processing module 701. The communication device 70 may be a first-class terminal, or a device in the first-class terminal, or a device that can be used in conjunction with the first-class terminal. Alternatively, the communication device 70 may be a network device, or a device in the network device, or a device that can be used in conjunction with the network device.

[0198] The communication device 70 is a first type terminal: the processing module 701 is used to determine the first transmission number of the first type terminal; wherein the first transmission number is less than the second transmission number of the second type terminal for four-step random access, the first type terminal supports four-step random access with message 3 retransmission, and the first transmission number is the maximum transmission number of the first type terminal using the four-step random access message 1 that does not support message 3 retransmission.

[0199] The communication device 70 is a network device: a processing module 701 is used to send configuration information to a first type of terminal; based on the configuration information, a first transmission number of the first type of terminal is determined; wherein the first transmission number is less than a second transmission number of a second type of terminal for four-step random access, the first type of terminal supports four-step random access with message 3 retransmission, and the first transmission number is the maximum transmission number of the first type of terminal using four-step random access message 1 that does not support message 3 retransmission.

[0200] See also Fig.17 , Fig.17 It is a structural diagram of another communication device 1000 provided in an embodiment of the present disclosure.

[0201] The communication device 1000 may be a network device, or a terminal device, or a chip, a chip system, or a processor that supports the network device to implement the above method, or a chip, a chip system, or a processor that supports the terminal device to implement the above method. The device may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.

[0202] The communication device 1000 may include one or more processors 1001. The processor 1001 may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a computer program, and process the data of the computer program.

[0203] Optionally, the communication device 1000 may further include one or more memories 1002, on which a computer program 1004 may be stored, and the memory 1002 executes the computer program 1004 so that the communication device 1000 executes the method described in the above method embodiment. Optionally, data may also be stored in the memory 1002. The communication device 1000 and the memory 1002 may be provided separately or integrated together.

[0204] Optionally, the communication device 1000 may further include a transceiver 1005 and an antenna 1006. The transceiver 1005 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., for implementing a transceiver function. The transceiver 1005 may include a receiver and a transmitter, the receiver may be referred to as a receiver or a receiving circuit, etc., for implementing a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., for implementing a transmitting function.

[0205] Optionally, the communication device 1000 may further include one or more interface circuits 1007. The interface circuit 1007 is used to receive code instructions and transmit them to the processor 1001. The processor 1001 executes the code instructions to enable the communication device 1000 to execute the method described in the above method embodiment.

[0206] The communication device 1000 is a first-class terminal: the processor 1001 is used to execute Figure 2 S21 in; Figure 3 S31 and S32 in; Figure 4 S41 and S42 in Figure 5 S51 and S52 in; Figure 6 S61 and S62 in; Figure 7 S71 in; Figure 8 S81 in; Fig. 9 S91 in; Fig.10 S101 in.

[0207] The communication device 1000 is a network device: the processor 1001 is used to execute Fig.11 S111 and S112 in; Fig.12 S121 and S122 in; Fig.13 S131 and S132 in; Fig.14 S141 and S142 in; Fig.15 S151 and S152 in.

[0208] In one implementation, the processor 1001 may include a transceiver for implementing receiving and sending functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing the receiving and sending functions may be separate or integrated. The above-mentioned transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or the above-mentioned transceiver circuit, interface, or interface circuit may be used for transmitting or delivering signals.

[0209] In one implementation, the processor 1001 may store a computer program 1003, which runs on the processor 1001 and enables the communication device 1000 to perform the method described in the above method embodiment. The computer program 1003 may be fixed in the processor 1001, in which case the processor 1001 may be implemented by hardware.

[0210] In one implementation, the communication device 1000 may include a circuit that can implement the functions of sending or receiving or communicating in the aforementioned method embodiments. The processor and transceiver described in the present disclosure may be implemented in an integrated circuit (IC), an analog IC, a radio frequency integrated circuit RFIC, a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and transceiver may also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (nMetal-oxide-semiconductor, NMOS), P-type metal oxide semiconductor (positive channelmetal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0211] The communication device described in the above embodiments may be a terminal device (such as the first type of terminal in the above method embodiment), or may be a network device, but the scope of the communication device described in the present disclosure is not limited thereto, and the structure of the communication device may not be limited thereto. Fig.17 The communication device may be an independent device or may be part of a larger device. For example, the communication device may be:

[0212] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0213] (2) having a set of one or more ICs, and optionally, the IC set may also include a storage component for storing data and computer programs;

[0214] (3) ASIC, such as modem;

[0215] (4) Modules that can be embedded in other devices;

[0216] (5) Receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.;

[0217] (6)Others

[0218] For cases where the communication device may be a chip or a chip system, see Fig.18 , is a structural diagram of a chip provided in an embodiment of the present disclosure.

[0219] like Fig.18 As shown, the chip 1100 includes a processor 1101 and an interface 1103. The number of the processor 1101 can be one or more, and the number of the interface 1103 can be multiple.

[0220] For the case where the chip is used to implement the functions of the first type of terminal in the embodiment of the present disclosure:

[0221] The interface 1103 is used to receive code instructions and transmit them to the processor.

[0222] The processor 1101 is configured to run code instructions to execute the random access method as described in some of the above embodiments.

[0223] For the case where the chip is used to implement the functions of the network device in the embodiment of the present disclosure:

[0224] The interface 1103 is used to receive code instructions and transmit them to the processor.

[0225] The processor 1101 is configured to run code instructions to execute the random access method as described in some of the above embodiments.

[0226] Optionally, the chip 1100 further includes a memory 1102, and the memory 1102 is used to store necessary computer programs and data.

[0227] Those skilled in the art may also understand that the various illustrative logical blocks and steps listed in the embodiments of the present disclosure may be implemented by electronic hardware, computer software, or a combination of the two. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the functions described for each specific application, but such implementation should not be understood as exceeding the scope of protection of the embodiments of the present disclosure.

[0228] The present disclosure also provides a readable storage medium having instructions stored thereon, which implement the functions of any of the above method embodiments when executed by a computer.

[0229] The present disclosure also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0230] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, the process or function described in the embodiment of the present disclosure is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0231] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and other forms thereof, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open, inclusive, that is, "including, but not limited to". In the description of the specification, the terms "some embodiments", "exemplary embodiments", etc. are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0232] Those skilled in the art can understand that the various numerical numbers such as first and second involved in the present disclosure are only used for distinction for convenience of description and are not used to limit the scope of the embodiments of the present disclosure, and also indicate the order of precedence.

[0233] At least one in the present disclosure can also be described as one or more, and a plurality can be two, three, four or more, which is not limited in the present disclosure. In the embodiments of the present disclosure, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", etc., and there is no order of precedence or size between the technical features described by the "first", "second", "third", "A", "B", "C" and "D". "A and / or B" includes the following three combinations: only A, only B, and a combination of A and B.

[0234] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this disclosure.

[0235] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0236] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A random access method, characterized in that: The method is performed by a first-category terminal, and the method includes: Receiving configuration information of network devices; According to the configuration information, determine a first transmission number of the first type of terminal; wherein the first transmission number is the maximum transmission number of message 1 of the first type of terminal in a four-step random access mode that does not support message 3 retransmission; and the first transmission number is less than the second transmission number, and the first type of terminal supports message 3 retransmission msg3 repetition; wherein the value of the first transmission number includes 30 or 20, and the value of the second transmission number includes 50, 100 or 200; the second transmission number is the maximum transmission number of message 1 transmission in four-step random access of a terminal that does not support message 3 retransmission.

2. The method according to claim 1, characterized in that The configuration information includes a first value of the first transmission number; and determining the first transmission number according to the configuration information includes: The first transmission number is determined to be the first value.

3. The method according to claim 1, characterized in that: The configuration information includes a second value of the second transmission number and a first parameter value; and determining the first transmission number according to the configuration information includes: determining the first transmission number according to the second value and the first parameter value; The step of determining the first transmission number according to the second value and the first parameter value includes: Determine the first transmission number as the second value minus the first parameter value; wherein the first parameter value is less than the second value; or Determine the first transmission number as the product of the second value and the first parameter value; wherein the first parameter value is greater than 0 and less than 1.

4. The method according to claim 1, characterized in that: The configuration information includes a third value of the second transmission number, the protocol stipulates a second parameter value, and the method further includes: The first transmission number is determined according to the third value and the second parameter value.

5. The method according to claim 4, characterized in that The determining the first transmission number according to the third value and the second parameter value includes: The first transmission number is determined to be the third value minus the second parameter value, and the second parameter value is smaller than the third value.

6. The method according to claim 4, characterized in that The determining the first transmission number according to the third value and the second parameter value includes: Determine the first transmission number as the product of the third value and the second parameter value; wherein the second parameter value is greater than 0 and less than 1.

7. The method according to any one of claims 1 to 6, characterized in that The method further comprises: In response to the first type of terminal using a four-step random access method that does not support message 3 retransmission, the number of message 1 transmissions reaches the first number of transmissions, and random access fails, switching to a method that supports message 3 retransmission for four-step random access.

8. The method according to any one of claims 1 to 6, characterized in that The method further comprises: In response to the first type of terminal performing a four-step random access in a manner that does not support retransmission of message 3, the number of message 1 transmissions reaches the first number of transmissions, and random access fails, determining channel quality; In response to the channel quality being less than the threshold, switching to a mode supporting retransmission of message 3 to perform four-step random access.

9. The method according to claim 8, characterized in that The determining of the channel quality comprises: Measure the reference signal received power RSRP of the synchronization signal block SSB.

10. The method according to claim 9, characterized in that The method further comprises: In a case where the RSRP is greater than or equal to the threshold, random access is performed in a manner that does not support retransmission of message 3 until the transmission of message 1 reaches a second transmission number.

11. A random access method, characterized in that: The method is performed by a network device, and the method comprises: Sending configuration information to the first type of terminal; Determine a first transmission number of the first category terminal; wherein the first transmission number is the maximum transmission number of message 1 of the first category terminal in a four-step random access mode that does not support message 3 retransmission; and the first transmission number is less than the second transmission number, and the first category terminal supports message 3 retransmission msg3 repetition; wherein the first transmission number takes a value of 30 or 20, and the second transmission number takes a value of 50, 100 or 200; the second transmission number is the maximum transmission number of message 1 transmission in four-step random access of a terminal that does not support message 3 retransmission.

12. The method according to claim 11, characterized in that The configuration information includes a first value of the first transmission number; and determining the first transmission number of the first type of terminal according to the configuration information includes: The first transmission number is determined to be the first value.

13. The method according to claim 11, characterized in that The configuration information includes a second value of the second transmission number and a first parameter value; and determining the first transmission number according to the configuration information includes: determining the first transmission number according to the second value and the first parameter value; The step of determining the first transmission number according to the second value and the first parameter value includes: Determine the first transmission number as the second value minus the first parameter value; wherein the first parameter value is less than the second value; or Determine the first transmission number as the product of the second value and the first parameter value; wherein the first parameter value is greater than 0 and less than 1.

14. The method according to claim 11, characterized in that The configuration information includes a third value of the second transmission number, the protocol stipulates a second parameter value, and the method further includes: The first transmission number is determined according to the third value and the second parameter value.

15. The method according to claim 14, characterized in that The determining the first transmission number according to the third value and the second parameter value includes: The first transmission number is determined to be the third value minus the second parameter value; wherein the second parameter value is smaller than the third value.

16. The method according to claim 15, characterized in that The determining the first transmission number according to the third value and the second parameter value includes: Determine the first transmission number as the product of the third value and the second parameter value; wherein the second parameter value is greater than 0 and less than 1.

17. A communication device, characterized in that: include: A transceiver module, used for receiving configuration information of network equipment; A processing module, used to determine a first transmission number of a first type of terminal; wherein the first transmission number is the maximum transmission number of message 1 of the first type of terminal in a four-step random access mode that does not support message 3 retransmission; and the first transmission number is less than a second transmission number of a second type of terminal for four-step random access, and the first type of terminal supports message 3 retransmission msg3 repetition; wherein the value of the first transmission number includes 30 or 20, and the value of the second transmission number includes 50, 100 or 200; the second transmission number is the maximum transmission number of message 1 transmission for four-step random access of a terminal that does not support message 3 retransmission.

18. A communication device, characterized in that: include: A transceiver module, used for sending configuration information to the first type of terminal; A processing module, used to determine a first transmission number of the first type of terminal; wherein the first transmission number is the maximum transmission number of message 1 of the first type of terminal in a four-step random access mode that does not support message 3 retransmission; and the first transmission number is less than a second transmission number of the second type of terminal for four-step random access, and the first type of terminal supports message 3 retransmission msg3 repetition; wherein the value of the first transmission number includes 30 or 20, and the value of the second transmission number includes 50, 100 or 200; the second transmission number is the maximum transmission number of message 1 transmission of four-step random access of a terminal that does not support message 3 retransmission.

19. A computer-readable storage medium storing instructions, which, when executed, enable the method according to any one of claims 1 to 10 to be implemented, or, when executed, enable the method according to any one of claims 11 to 16 to be implemented.

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