Random access method and device

Abstract

The embodiments of the present application disclose a random access method and apparatus, which repeatedly sends a first random access message to a network device on multiple random access occasions, determines the random access radio network temporary identifier RA-RNTI of the terminal device according to one of the multiple random access occasions, and uses the RA-RNTI to detect a second random access message or a physical downlink control channel PDCCH sent by the network device, so that the terminal device can use one RA-RNTI to perform PDCCH blind detection when repeatedly sending PRACH, effectively reducing the complexity of blind detection of the terminal device, reducing the energy consumption of the terminal device, and improving the communication efficiency of the system.

Description

Technical Field

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

[0002] In the four-step random access process of the 5G NR (New Radio) system, the terminal device can send a first random access message Msg1 (message 1) to the network device. After receiving Msg1, the network device can send a second random access message Msg2 (message 2) to the terminal device.

[0003] The RA-RNTI (Random Access-Radio Network Temporary Identifier) ​​can represent the time-frequency resources used when sending Msg1. After receiving the Msg1, the network device will calculate the RA-RNTI and use it as a scrambling code to scramble the CRC (Cyclic Redundancy Check) of the PDCCH DCI format 1_0 (Physical Downlink Control Channel, PDCCH, physical downlink control channel; Downlink Control Information, DCI, downlink control information; format) of Msg2. Therefore, only the terminal device that sends Msg1 on the time-frequency resources identified by the RA-RNTI can correctly decode the DCI of this PDCCH. Summary of the Invention

[0004] A first aspect of the present application provides a random access method, which is performed by a terminal device and includes:

[0005] repeatedly sending a first random access message to the network device on multiple random access opportunities;

[0006] Determining a random access radio network temporary identifier RA-RNTI of the terminal device according to one of the multiple random access opportunities;

[0007] The RA-RNTI is used to detect a second random access message or a physical downlink control channel PDCCH sent by the network device.

[0008] Optionally, the determining, according to one of the multiple random access opportunities, a random access radio network temporary identifier RA-RNTI of the terminal device includes:

[0009] Determining a target random access opportunity among the multiple random access opportunities according to the agreement;

[0010] Determine the RA-RNTI of the terminal device according to the target random access timing.

[0011] Optionally, the sequence number of the target random access opportunity is associated with the number of the multiple random access opportunities.

[0012] Optionally, the determining, according to one of the multiple random access opportunities, a random access radio network temporary identifier RA-RNTI of the terminal device includes:

[0013] receiving indication information sent by the network device, where the indication information is used to determine a target random access opportunity among the multiple random access opportunities;

[0014] Determine the RA-RNTI of the terminal device according to the target random access timing.

[0015] Optionally, the determining, according to one of the multiple random access opportunities, a random access radio network temporary identifier RA-RNTI of the terminal device includes:

[0016] determining, according to a system frame number SFN of a system frame in which the multiple random access opportunities are located, a target random access opportunity among the multiple random access opportunities;

[0017] Determine the RA-RNTI of the terminal device according to the target random access timing.

[0018] Optionally, sequence numbers of target random access opportunities in two groups of multiple random access opportunities in adjacent system frames are different.

[0019] A second aspect of the present application provides a random access method, which is performed by a network device and includes:

[0020] Receiving a first random access message repeatedly sent by a terminal device on multiple random access opportunities;

[0021] Determining a random access radio network temporary identifier RA-RNTI of the terminal device according to one of the multiple random access opportunities;

[0022] A second random access message or a physical downlink control channel PDCCH encrypted with the RA-RNTI is sent to the terminal device.

[0023] Optionally, the determining, according to one of the multiple random access opportunities, a random access radio network temporary identifier RA-RNTI of the terminal device includes:

[0024] Determining a target random access opportunity among the multiple random access opportunities according to the agreement;

[0025] Determine the RA-RNTI of the terminal device according to the target random access timing.

[0026] Optionally, the sequence number of the target random access opportunity is associated with the number of the multiple random access opportunities.

[0027] Optionally, the determining, according to one of the multiple random access opportunities, a random access radio network temporary identifier RA-RNTI of the terminal device includes:

[0028] determining a target random access opportunity among the multiple random access opportunities;

[0029] Determining the RA-RNTI of the terminal device according to the target random access opportunity;

[0030] Send indication information to the terminal device, where the indication information is used to indicate the target random access timing.

[0031] Optionally, the determining, according to one of the multiple random access opportunities, a random access radio network temporary identifier RA-RNTI of the terminal device includes:

[0032] determining, according to a system frame number SFN of a system frame in which the multiple random access opportunities are located, a target random access opportunity among the multiple random access opportunities;

[0033] Determine the RA-RNTI of the terminal device according to the target random access timing.

[0034] Optionally, sequence numbers of target random access opportunities in two groups of multiple random access opportunities in adjacent system frames are different.

[0035] A third aspect of the present application provides a random access device, which is applied to a terminal device and includes:

[0036] a transceiver unit, configured to repeatedly send a first random access message to a network device on multiple random access opportunities;

[0037] a processing unit, configured to determine a random access radio network temporary identifier RA-RNTI of the terminal device according to one of the multiple random access opportunities;

[0038] The transceiver unit is further configured to use the RA-RNTI to detect a second random access message or a physical downlink control channel PDCCH sent by the network device.

[0039] Optionally, the processing unit is specifically configured to:

[0040] Determining a target random access opportunity among the multiple random access opportunities according to the agreement;

[0041] Determine the RA-RNTI of the terminal device according to the target random access timing.

[0042] Optionally, the sequence number of the target random access opportunity is associated with the number of the multiple random access opportunities.

[0043] Optionally, the processing unit is specifically configured to:

[0044] receiving indication information sent by the network device, where the indication information is used to determine a target random access opportunity among the multiple random access opportunities;

[0045] Determine the RA-RNTI of the terminal device according to the target random access timing.

[0046] Optionally, the processing unit is specifically configured to:

[0047] determining, according to a system frame number SFN of a system frame in which the multiple random access opportunities are located, a target random access opportunity among the multiple random access opportunities;

[0048] Determine the RA-RNTI of the terminal device according to the target random access timing.

[0049] Optionally, sequence numbers of target random access opportunities in two groups of multiple random access opportunities in adjacent system frames are different.

[0050] A fourth embodiment of the present application provides a random access device, which is applied to a network device and includes:

[0051] a transceiver unit, configured to receive a first random access message repeatedly sent by a terminal device on multiple random access opportunities;

[0052] a processing unit, configured to determine a random access radio network temporary identifier RA-RNTI of the terminal device according to one of the multiple random access opportunities;

[0053] The transceiver unit is further used to send a second random access message or a physical downlink control channel PDCCH encrypted with the RA-RNTI to the terminal device.

[0054] Optionally, the processing unit is specifically configured to:

[0055] Determining a target random access opportunity among the multiple random access opportunities according to the agreement;

[0056] Determine the RA-RNTI of the terminal device according to the target random access timing.

[0057] Optionally, the sequence number of the target random access opportunity is associated with the number of the multiple random access opportunities.

[0058] Optionally, the processing unit is specifically configured to:

[0059] determining a target random access opportunity among the multiple random access opportunities;

[0060] Determining the RA-RNTI of the terminal device according to the target random access opportunity;

[0061] Send indication information to the terminal device, where the indication information is used to indicate the target random access timing.

[0062] Optionally, the processing unit is specifically configured to:

[0063] determining, according to a system frame number SFN of a system frame in which the multiple random access opportunities are located, a target random access opportunity among the multiple random access opportunities;

[0064] Determine the RA-RNTI of the terminal device according to the target random access timing.

[0065] Optionally, sequence numbers of target random access opportunities in two groups of multiple random access opportunities in adjacent system frames are different.

[0066] The fifth aspect embodiment of the present application proposes a communication device, which includes a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program stored in the memory so that the device performs the random access method described in the first aspect embodiment above.

[0067] The sixth aspect embodiment of the present application proposes a communication device, which includes a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program stored in the memory so that the device performs the random access method described in the second aspect embodiment above.

[0068] The seventh aspect embodiment of the present application proposes a communication device, which includes a processor and an interface circuit, 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 random access method described in the first aspect embodiment above.

[0069] The eighth embodiment of the present application proposes a communication device, which includes a processor and an interface circuit. The interface circuit is used to receive code instructions and transmit them to the processor. The processor is used to run the code instructions to enable the device to execute the random access method described in the second embodiment above.

[0070] The ninth aspect embodiment of the present application proposes a computer-readable storage medium for storing instructions. When the instructions are executed, the random access method described in the first aspect embodiment is implemented.

[0071] The tenth aspect embodiment of the present application proposes a computer-readable storage medium for storing instructions. When the instructions are executed, the random access method described in the above-mentioned second aspect embodiment is implemented.

[0072] The eleventh embodiment of the present application proposes a computer program, which, when executed on a computer, enables the computer to execute the random access allocation method described in the first embodiment.

[0073] The twelfth embodiment of the present application proposes a computer program, which, when executed on a computer, enables the computer to execute the random access method described in the second embodiment.

[0074] A random access method and apparatus provided in an embodiment of the present application repeatedly sends a first random access message to a network device at multiple random access opportunities, determines the random access radio network temporary identifier RA-RNTI of the terminal device according to one of the multiple random access opportunities, and uses the RA-RNTI to detect a second random access message or a physical downlink control channel PDCCH sent by the network device, so that the terminal device can use one RA-RNTI to perform PDCCH blind detection when repeatedly sending PRACH, effectively reducing the complexity of blind detection of the terminal device, reducing the energy consumption of the terminal device, and improving the communication efficiency of the system.

[0075] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0077] Figure 1 A schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0078] Figure 2 This is a flowchart of a random access method provided by an embodiment of the present application;

[0079] Figure 3 This is a flowchart of a random access method provided by an embodiment of the present application;

[0080] Figure 4 This is a flowchart of a random access method provided by an embodiment of the present application;

[0081] Figure 5 This is a flowchart of a random access method provided by an embodiment of the present application;

[0082] Figure 6a This is a schematic diagram of a PRACH repeated transmission resource configuration method provided in an embodiment of the present application;

[0083] Figure 6b This is a schematic diagram of a method for determining a random access timing provided by an embodiment of the present application;

[0084] Figure 7 This is a flowchart of a random access method provided by an embodiment of the present application;

[0085] Figure 8 1 is a schematic structural diagram of a random access device provided in an embodiment of the present application;

[0086] Figure 9 1 is a schematic structural diagram of a random access device provided in an embodiment of the present application;

[0087] Figure 10 is a structural diagram of another random access device provided in an embodiment of the present application;

[0088] Figure 11 This is a schematic diagram of the structure of a chip provided in an embodiment of the present application. DETAILED DESCRIPTION

[0089] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numbers in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0090] The terms used in the embodiments of this application are for the purpose of describing specific embodiments only and are not intended to limit the embodiments of this application. The singular forms "a" and "the" used in the embodiments of this application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0091] It should be understood that although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the embodiments of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein may be interpreted as "at the time of" or "when" or "in response to a determination."

[0092] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0093] In order to better understand a random access method disclosed in an embodiment of the present application, the communication system to which the embodiment of the present application is applicable is first described below.

[0094] See Figure 1 , Figure 1 This is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application. The communication system may include but is not limited to a first network device, a second network device and a terminal device. Figure 1 The number and form of the devices shown are for example only and do not constitute a limitation on the embodiments of the present application. 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.

[0095] It should be noted that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as Long Term Evolution (LTE) systems, fifth-generation mobile communication systems, 5G new air interface systems, or other future new mobile communication systems.

[0096] The network device 101 in the embodiment of the present application is an entity on the network side for transmitting or receiving signals. 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 application 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 application 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 a network device, such as a base station, and the functions of some protocol layers are placed in the CU for centralized control, while 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.

[0097] The terminal device 102 in the embodiment of the present application is an entity on the user side for receiving or transmitting signals, such as a mobile phone. The terminal device can also be called a terminal device (terminal), user equipment (UE), mobile station (MS), mobile terminal device (MT), etc. The terminal device can be a car with communication function, a smart car, a mobile phone (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 (Self-Driving), a wireless terminal device in remote medical surgery (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 application does not limit the specific technology and specific device form adopted by the terminal device.

[0098] In the four-step random access process of the 5G NR (New Radio) system, the terminal device 102 can send a first random access message Msg1 (message 1) to the network device 101. After receiving the Msg1, the network device 101 can send a second random access message Msg2 (message 2) to the terminal device.

[0099] RA-RNTI (Random Access-Radio Network Temporary Identifier) ​​can represent the time-frequency resources used when sending Msg1. When the terminal device 102 sends Msg1, it will calculate and save the RA-RNTI. After receiving the Msg1, the network device 101 will also calculate the RA-RNTI and use the RA-RNTI as the scrambling code to scramble the CRC (Cyclic Redundancy Check) of the PDCCH DCI format1_0 (Physical Downlink Control Channel, PDCCH, physical downlink control channel, Downlink Control Information, DCI, downlink control information, format) of Msg2. Therefore, only the UE that sends Msg1 on the time-frequency resources identified by RA-RNTI can correctly decode the DCI of this PDCCH.

[0100] In 3GPP Release 18, for PRACH (Physical Random Access Channel) coverage enhancement, it is proposed that multiple transmissions in the time domain, i.e., PRACH repetition, can be performed. One possible approach is for the terminal device 102 to use the same uplink transmit beam (UL TX beam) to perform repeated transmissions on multiple transmission occasions (i.e., random access occasions RO). The multiple transmission time slots corresponding to the multiple transmission occasions can be continuous or discrete, which is not limited here.

[0101] If the terminal device 102 uses multiple random access occasions RO (RACH Occasion, RACH, Random Access Channel) to repeatedly send PRACH, the network device 101 and the terminal device 102 may use RA-RNTIs corresponding to different RO occasions to transmit and detect Msg2 or PDCCH for Msg2, resulting in the terminal device 102 being unable to detect the Msg2 for the terminal device, or the terminal device 102 uses RA-RNTIs corresponding to multiple RO occasions for detection, increasing the detection complexity.

[0102] It can be understood that the communication system described in the embodiment of the present application is for the purpose of more clearly illustrating the technical solution of the embodiment of the present application, and does not constitute a limitation on the technical solution provided by the embodiment of the present application. Ordinary technicians in this field 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 application is also applicable to similar technical problems.

[0103] The random access method and apparatus provided by the present application are described in detail below with reference to the accompanying drawings.

[0104] See Figure 2 , Figure 2 This is a flow chart of a random access method provided by an embodiment of the present application. It should be noted that the random access method of the embodiment of the present application is executed by a terminal device. This method can be executed independently or in combination with any other embodiment of the present application. Figure 2 As shown, the method may include the following steps:

[0105] Step 201: repeatedly send a first random access message to a network device on multiple random access opportunities RO.

[0106] In an embodiment of the present application, a terminal device can repeatedly send a first random access message Msg1 to a network device on multiple random access occasions RO. After receiving the Msg1, the network device can send a second random access message Msg2 to the terminal device. The first random access messages sent in the multiple ROs are the same.

[0107] It should be noted that, in the embodiment of the present application, the first random access message Msg1 is a random access preamble (Random Access Preamble), and the second random access message Msg2 is a random access response RAR (Random Access Response).

[0108] After sending the first random access message, the terminal device can attempt to detect the second random access message or the physical downlink control channel PDCCH sent by the network device in the RAR window.

[0109] In the embodiment of the present application, the multiple random access occasions RO may be pre-configured by the network device or pre-agreed by the protocol.

[0110] As a possible implementation, the multiple random access opportunities RO correspond to multiple time slots in the time domain, and the multiple time slots can be continuous or discrete, which is not limited here. Figure 6a As shown, Figure 6aThis is a schematic diagram of a PRACH repeated transmission resource configuration method provided by an embodiment of the present application, in which the terminal device can Figure 6a Msg1 is sent repeatedly to the four ROs (RO#0-RO#3) configured in the .

[0111] Step 202: according to the multiple random access opportunities Target The parameters of the random access opportunity determine the random access radio network temporary identifier RA-RNTI of the terminal device.

[0112] In the embodiment of the present application, the terminal device can determine the RA-RATI of the terminal device according to the parameters of one RO among the multiple ROs, so as to detect the Msg2 or PDCCH sent by the network device.

[0113] In some implementations, the terminal device can determine the random access opportunity (RO) for calculating the RA-RNTI according to the protocol. Subsequently, both the network device and the terminal device can determine the RA-RNTI based on parameters related to the RO, thereby preventing the base station and the terminal from being unable to determine which RO's parameters to use to determine the RA-RNTI when receiving Msg1 sent via multiple ROs.

[0114] In some implementations, the terminal device can determine the random access opportunity RO for calculating the RA-RNTI according to the received indication information sent by the network device.

[0115] In some implementations, the terminal device can determine the random access opportunity RO for calculating the RA-RNTI according to the system frame number SFN of the system frame where the multiple ROs are located.

[0116] In the embodiment of the present application, the calculation formula of RA-RNTI is:

[0117] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id.

[0118] The meanings of the parameters are shown in the following table:

[0119]

[0120] In some possible implementations, the above method may further include:

[0121] Step 203: Use the RA-RNTI to detect a second random access message or a physical downlink control channel PDCCH sent by the network device.

[0122] In an embodiment of the present application, after sending Msg1, the terminal device can use the RA-RNTI determined in the above steps in the RAR window to detect Msg2 or PDCCH sent by the network device.

[0123] In some implementations, the terminal device can use the RA-RNTI to detect PDCCH DCI format 1_0.

[0124] In summary, by repeatedly sending the first random access message to the network device at multiple random access opportunities, the random access radio network temporary identifier RA-RNTI of the terminal device is determined according to one of the multiple random access opportunities, and the RA-RNTI is used to detect the second random access message or physical downlink control channel PDCCH sent by the network device, so that the terminal device can use one RA-RNTI to perform PDCCH blind detection when repeatedly sending PRACH, which effectively reduces the complexity of the terminal device's blind detection, reduces the energy consumption of the terminal device, and improves the communication efficiency of the system.

[0125] See Figure 3 , Figure 3 This is a flow chart of a random access method provided by an embodiment of the present application. It should be noted that the random access method of the embodiment of the present application is executed by a terminal device. This method can be executed independently or in combination with any other embodiment of the present application. Figure 3 As shown, the method may include the following steps:

[0126] Step 301: repeatedly send a first random access message to a network device at multiple random access opportunities.

[0127] In an embodiment of the present application, a terminal device can repeatedly send a first random access message Msg1 to a network device on multiple random access occasions RO. After receiving the Msg1, the network device can send a second random access message Msg2 to the terminal device. The first random access messages sent in the multiple ROs are the same.

[0128] It should be noted that, in the embodiment of the present application, the first random access message Msg1 is a random access preamble sequence, and the second random access message Msg2 is a random access response RAR.

[0129] After sending the first random access message, the terminal device can attempt to detect the second random access message or the physical downlink control channel PDCCH sent by the network device in the RAR window.

[0130] In the embodiment of the present application, the multiple random access occasions RO may be pre-configured by the network device or pre-agreed by the protocol.

[0131] As a possible implementation, the multiple random access opportunities RO correspond to multiple time slots in the time domain. The multiple time slots can be continuous or discrete, and are not limited herein.

[0132] Step 302: Determine the target random access opportunity among the multiple random access opportunities according to the agreement of the protocol.

[0133] The target random access opportunity is the random access opportunity used to calculate the RA-RNTI.

[0134] In the embodiments of the present application, the terminal device can determine the target random access opportunity for calculating the RA-RNTI among the multiple random access opportunities RO for repeatedly sending Msg1 according to the agreement of the protocol. Subsequently, both the network device and the terminal device can determine the RA-RNTI according to the parameters related to the RO, so as to prevent the problem that when the base station and the terminal receive Msg1 sent through multiple ROs, they cannot determine which RO's parameters are used to determine the RA-RNTI.

[0135] In some embodiments, the protocol can agree that the target random access opportunity RO is the first one among the multiple random access opportunities RO (a total of N, N is a positive integer) (such as Figure 6a RO#0 in Figure 6a ), or can agree that the target RO is the last one among the multiple ROs (a total of N, N is a positive integer) (such as

[0136] RO#3 in

[0137] ), or can also agree that the target RO is the Mth one among the multiple ROs (a total of N, N is a positive integer), where M < N and M is a positive integer.

[0138] It can be understood that the above-mentioned association relationship between the serial number of the target RO and the number of the multiple ROs is only shown as an example, and there can be other association relationships, which are not limited herein.

[0139] Step 303: Determine the RA-RNTI of the terminal device according to the parameters of the target random access opportunity.

[0140] In the embodiments of the present application, the terminal device can determine the RA-RNTI of the terminal device according to the target RO.

[0141] In the embodiment of the present application, the calculation formula of the RA-RNTI is:

[0142] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id.

[0143] The meanings of the parameters are shown in the following table:

[0144]

[0145] In some possible implementations, the above method may further include:

[0146] Step 304: Use the RA-RNTI to detect a second random access message or a physical downlink control channel PDCCH sent by the network device.

[0147] In an embodiment of the present application, after sending Msg1, the terminal device can use the RA-RNTI determined in the above steps in the RAR window to detect Msg2 or PDCCH sent by the network device.

[0148] In some implementations, the terminal device can use the RA-RNTI to detect PDCCH DCI format 1_0.

[0149] In summary, by repeatedly sending the first random access message to the network device at multiple random access opportunities, according to the agreement of the protocol, the target random access opportunity among the multiple random access opportunities is determined, and according to the target random access opportunity, the RA-RNTI of the terminal device is determined, and the RA-RNTI is used to detect the second random access message or physical downlink control channel PDCCH sent by the network device, so that the terminal device can use one RA-RNTI to perform PDCCH blind detection when repeatedly sending PRACH, which effectively reduces the complexity of the terminal device's blind detection, reduces the energy consumption of the terminal device, and improves the communication efficiency of the system.

[0150] See Figure 4 , Figure 4 This is a flow chart of a random access method provided by an embodiment of the present application. It should be noted that the random access method of the embodiment of the present application is executed by a terminal device. This method can be executed independently or in combination with any other embodiment of the present application. Figure 4 As shown, the method may include the following steps:

[0151] Step 401: repeatedly send a first random access message to a network device at multiple random access opportunities.

[0152] In an embodiment of the present application, a terminal device can repeatedly send a first random access message Msg1 to a network device on multiple random access occasions RO. After receiving the Msg1, the network device can send a second random access message Msg2 to the terminal device. The first random access messages sent in the multiple ROs are the same.

[0153] It should be noted that, in the embodiment of the present application, the first random access message Msg1 is a random access preamble sequence, and the second random access message Msg2 is a random access response RAR.

[0154] After sending the first random access message, the terminal device can attempt to detect the second random access message or the physical downlink control channel PDCCH sent by the network device in the RAR window.

[0155] In the embodiment of the present application, the multiple random access occasions RO may be pre-configured by the network device or pre-agreed by the protocol.

[0156] As a possible implementation manner, the multiple random access occasions RO correspond to multiple time slots in the time domain. The multiple time slots may be continuous or discrete, which is not limited here.

[0157] Step 402: Receive indication information sent by the network device, where the indication information is used to determine a target random access opportunity among the multiple random access opportunities.

[0158] The target random access opportunity is a random access opportunity used to calculate the RA-RNTI.

[0159] In an embodiment of the present application, a terminal device is capable of receiving indication information sent by a network device and, based on the received indication information, determining a target random access opportunity for calculating the RA-RNTI from among multiple random access opportunities ROs for repeatedly sending Msg1. Subsequently, both the network device and the terminal device are capable of determining the RA-RNTI based on parameters associated with the RO, thereby preventing the base station and the terminal from being unable to determine which RO's parameters to use to determine the RA-RNTI when receiving Msg1 sent via multiple ROs.

[0160] In some implementations, the indication information may indicate that the target random access opportunity RO is the Mth random access opportunity RO among a plurality of random access opportunities RO (a total of N, where N is a positive integer), where M≤N, and M is a positive integer.

[0161] Optionally, the indication information may explicitly indicate the target RO, such as directly indicating the value of M or the sequence number of the target RO, or may implicitly indicate the target RO.

[0162] Step 403: Determine the RA-RNTI of the terminal device according to the parameters of the target random access opportunity.

[0163] In the embodiment of the present application, the terminal device can determine the RA-RNTI of the terminal device according to the target RO.

[0164] In the embodiment of the present application, the calculation formula of the RA-RNTI is:

[0165] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id.

[0166] The meanings of the parameters are shown in the following table:

[0167]

[0168] In some possible implementations, the above method may further include:

[0169] Step 404: Use the RA-RNTI to detect a second random access message or a physical downlink control channel PDCCH sent by the network device.

[0170] In an embodiment of the present application, after sending Msg1, the terminal device can use the RA-RNTI determined in the above steps in the RAR window to detect Msg2 or PDCCH sent by the network device.

[0171] In some implementations, the terminal device can use the RA-RNTI to detect PDCCH DCI format 1_0.

[0172] In summary, by repeatedly sending a first random access message to a network device on multiple random access occasions, receiving indication information sent by the network device, the indication information is used to determine a target random access opportunity among the multiple random access opportunities, and determining the RA-RNTI of the terminal device according to the target random access opportunity, and using the RA-RNTI to detect the second random access message or physical downlink control channel PDCCH sent by the network device, the terminal device can use one RA-RNTI to perform PDCCH blind detection when repeatedly sending PRACH, which effectively reduces the complexity of blind detection of the terminal device, reduces the energy consumption of the terminal device, and improves the communication efficiency of the system.

[0173] See Figure 5 , Figure 5This is a flow chart of a random access method provided by an embodiment of the present application. It should be noted that the random access method of the embodiment of the present application is executed by a terminal device. This method can be executed independently or in combination with any other embodiment of the present application. Figure 5 As shown, the method may include the following steps:

[0174] Step 501: repeatedly send a first random access message to a network device at multiple random access opportunities.

[0175] In an embodiment of the present application, a terminal device can repeatedly send a first random access message Msg1 to a network device on multiple random access occasions RO. After receiving the Msg1, the network device can send a second random access message Msg2 to the terminal device. The first random access messages sent in the multiple ROs are the same.

[0176] It should be noted that, in the embodiment of the present application, the first random access message Msg1 is a random access preamble sequence, and the second random access message Msg2 is a random access response RAR.

[0177] After sending the first random access message, the terminal device can attempt to detect the second random access message or the physical downlink control channel PDCCH sent by the network device in the RAR window.

[0178] In the embodiment of the present application, the multiple random access occasions RO may be pre-configured by the network device or pre-agreed by the protocol.

[0179] As a possible implementation manner, the multiple random access occasions RO correspond to multiple time slots in the time domain. The multiple time slots may be continuous or discrete, which is not limited here.

[0180] Step 502: Determine a target random access opportunity among the multiple random access opportunities according to the system frame number SFN of the system frame where the multiple random access opportunities are located.

[0181] The target random access opportunity is a random access opportunity used to calculate the RA-RNTI.

[0182] In an embodiment of the present application, the terminal device can determine the target random access opportunity for calculating the RA-RNTI from among the multiple random access opportunities ROs in which Msg1 is repeatedly sent, based on the system frame numbers SFNs of the system frames in which the multiple random access opportunities ROs are located. Subsequently, both the network device and the terminal device can determine the RA-RNTI based on the parameters related to the RO, thereby preventing the base station and the terminal from being unable to determine which RO's parameters to use to determine the RA-RNTI when receiving Msg1 sent via multiple ROs.

[0183] In the embodiment of the present application, the SFNs of the system frames where the multiple ROs are located are different, and the time domain positions of the determined target ROs in the multiple ROs may be different.

[0184] In some implementations, the sequence numbers of the target random access opportunities in two groups of multiple random access opportunities in adjacent system frames are different.

[0185] In some implementations, the target RO may be determined according to the remainder of the SFN of the system frames where the multiple ROs are located relative to a specified value.

[0186] As an example, when SFN mod Q = 0, the first RO among N ROs is used as the target RO for RA-RNTI calculation; when SFN mod Q = 1, the second RO among N ROs is used as the target RO for RA-RNTI calculation; when SFN mod Q = 2, the third RO among N ROs is used as the target RO for RA-RNTI calculation, and so on. Wherein, mod represents modulo, and Q is a positive integer.

[0187] Optionally, the value of the specified value Q may be specified by the protocol, or may be determined by receiving an instruction from a network device, or may be determined based on the length of the RARwindow. For example, when the RARwindow is 4 SFNs (40ms), Q=4.

[0188] As an example, see Figure 6b , Figure 6b This is a schematic diagram of a method for determining a random access timing provided by an embodiment of the present application. Figure 6b In system frame SFN#n and system frame SFN#n+1, multiple ROs for repeatedly transmitting PRACH are configured, wherein, n mod Q=0, the first RO among the four ROs is used as the target RO, and n+1 mod Q=1, the second RO among the four ROs is used as the target RO.

[0189] In an embodiment of the present application, the target ROs determined by the two sets of ROs on adjacent system frames are different, which can avoid the situation where the terminal device may repeatedly interpret the DCI, especially in the scenario where the unlicensed frequency band NR-U (New Radio (NR) in Unlicensed Spectrum) RAR window is configured longer.

[0190] It should be noted that if the time slots and symbols of multiple ROs in SFN#n are the same as the time slots and symbols of multiple ROs in SFN#n+1, and the RAR window is greater than 10ms, the RAR window for SFN#n will include the RAR window for SFN#n+1, that is, the two RAR windows will overlap, and the RAR for SFN#n+1 may be received in the RAR window for SFN#n. If the RA-RNTIs of the two RARs are consistent (that is, the RO with the same serial number is selected as the target RO), the terminal device may repeatedly interpret the DCI.

[0191] Step 503: Determine the RA-RNTI of the terminal device according to the target random access opportunity.

[0192] In the embodiment of the present application, the terminal device can determine the RA-RNTI of the terminal device according to the target RO.

[0193] In the embodiment of the present application, the calculation formula of the RA-RNTI is:

[0194] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id.

[0195] The meanings of the parameters are shown in the following table:

[0196]

[0197]

[0198] In some possible implementations, the above method may further include:

[0199] Step 504: Use the RA-RNTI to detect a second random access message or a physical downlink control channel PDCCH sent by the network device.

[0200] In an embodiment of the present application, after sending Msg1, the terminal device can use the RA-RNTI determined in the above steps in the RAR window to detect Msg2 or PDCCH sent by the network device.

[0201] In some implementations, the terminal device can use the RA-RNTI to detect PDCCH DCI format 1_0.

[0202] In summary, by repeatedly sending the first random access message to the network device on multiple random access occasions, the target random access occasion among the multiple random access occasions is determined according to the system frame number SFN of the system frame where the multiple random access occasions are located, and the RA-RNTI of the terminal device is determined according to the target random access occasion. The RA-RNTI is used to detect the second random access message or physical downlink control channel PDCCH sent by the network device, so that the terminal device can use one RA-RNTI to perform PDCCH blind detection when repeatedly sending PRACH, which effectively reduces the complexity of blind detection of the terminal device, reduces the energy consumption of the terminal device, and improves the communication efficiency of the system.

[0203] See Figure 7 , Figure 7 This is a flow chart of a random access method provided by an embodiment of the present application. It should be noted that the random access method of the embodiment of the present application is executed by a network device. This method can be executed independently or in combination with any other embodiment of the present application. Figure 7 As shown, the method may include the following steps:

[0204] Step 701: Receive a first random access message repeatedly sent by a terminal device on multiple random access occasions.

[0205] In an embodiment of the present application, the terminal device can repeatedly send a first random access message Msg1 to the network device on multiple random access occasions RO. The first random access messages sent in the multiple ROs are the same. After receiving the Msg1, the network device can send a second random access message Msg2 to the terminal device.

[0206] It should be noted that, in the embodiment of the present application, the first random access message Msg1 is a random access preamble sequence, and the second random access message Msg2 is a random access response RAR.

[0207] In some implementations, the network device may perform combined correlation detection of Msg1 (preamble) on the last RO of the multiple ROs.

[0208] After receiving Msg1, the network device calculates the RA-RNTI and sends a second random access message or a physical downlink control channel PDCCH scrambled with the RA-RNTI to the terminal device.

[0209] In the embodiment of the present application, the multiple random access opportunities RO may be pre-configured by the network device or pre-agreed by the protocol.

[0210] As a possible implementation manner, the multiple random access occasions RO correspond to multiple time slots in the time domain. The multiple time slots may be continuous or discrete, which is not limited here.

[0211] Step 702: Determine a random access radio network temporary identifier RA-RNTI of the terminal device according to the parameters of the target random access opportunity among the multiple random access opportunities.

[0212] In the embodiment of the present application, the network device can determine the RA-RATI of the terminal device according to one of the multiple configured ROs, so as to scramble the sent PDCCH DCI format1_0.

[0213] In some implementations, the network device can determine the random access opportunity RO for calculating the RA-RNTI according to a protocol agreement.

[0214] In some implementations, the network device determines the random access opportunity RO for calculating the RA-RNTI by itself, and sends indication information to the terminal device, where the indication information is used to indicate the target random access opportunity RO.

[0215] In some implementations, the network device can determine the random access opportunity RO for calculating the RA-RNTI according to the system frame number SFN of the system frame where the multiple ROs are located.

[0216] In the embodiment of the present application, the calculation formula of RA-RNTI is:

[0217] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id.

[0218] The meanings of the parameters are shown in the following table:

[0219]

[0220] In some possible implementations, the above method may further include:

[0221] Step 703: Send a second random access message or a physical downlink control channel PDCCH encrypted with the RA-RNTI to the terminal device.

[0222] In an embodiment of the present application, after receiving Msg1, the network device can send Msg2 or PDCCH encrypted using the RA-RNTI determined in the above steps to the terminal device.

[0223] In some implementations, the network device can use the RA-RNTI as a scrambling code to scramble the PDCCH DCI format 1_0.

[0224] In summary, by receiving the secondary cell group failure information sent by the terminal device, the secondary cell group failure information includes relevant information on the addition or change of the conditional primary and secondary cells PSCell, so that when the secondary cell group failure occurs, the network device can also obtain relevant information on the addition or change of the conditional primary and secondary cells PSCell, so that the network device can obtain relevant information on the secondary cell group failure more comprehensively, and then can more accurately analyze the cause of the secondary cell group failure, effectively improving the communication efficiency of the system.

[0225] Corresponding to the random access methods provided in the above-mentioned embodiments, the present application also provides a random access device. Since the random access device provided in the embodiments of the present application corresponds to the methods provided in the above-mentioned embodiments, the implementation of the random access method is also applicable to the random access device provided in the following embodiments and will not be described in detail in the following embodiments.

[0226] See Figure 8 , Figure 8 A schematic diagram of the structure of a random access device provided in an embodiment of the present application.

[0227] like Figure 8 As shown, the random access device 800 includes: a transceiver unit 810 and a processing unit 820, wherein:

[0228] The transceiver unit 810 is configured to repeatedly send a first random access message to the network device on multiple random access opportunities;

[0229] The processing unit 820 is configured to determine a random access radio network temporary identifier RA-RNTI of the terminal device according to one of the multiple random access opportunities;

[0230] The transceiver unit 810 is further configured to use the RA-RNTI to detect a second random access message or a physical downlink control channel PDCCH sent by the network device.

[0231] Optionally, the processing unit 820 is specifically configured to:

[0232] Determining a target random access opportunity among the multiple random access opportunities according to the agreement;

[0233] The RA-RNTI of the terminal device is determined according to the target random access timing.

[0234] Optionally, the sequence number of the target random access opportunity is associated with the number of the multiple random access opportunities.

[0235] Optionally, the processing unit 820 is specifically configured to:

[0236] receiving indication information sent by the network device, where the indication information is used to determine a target random access opportunity among the multiple random access opportunities;

[0237] The RA-RNTI of the terminal device is determined according to the target random access timing.

[0238] Optionally, the processing unit 820 is specifically configured to:

[0239] determining, according to a system frame number SFN of a system frame in which the multiple random access opportunities are located, a target random access opportunity among the multiple random access opportunities;

[0240] The RA-RNTI of the terminal device is determined according to the target random access timing.

[0241] Optionally, sequence numbers of target random access opportunities in two groups of multiple random access opportunities in adjacent system frames are different.

[0242] The random access device of this embodiment can repeatedly send a first random access message to a network device at multiple random access opportunities, determine the random access radio network temporary identifier RA-RNTI of the terminal device according to one of the multiple random access opportunities, and use the RA-RNTI to detect the second random access message or physical downlink control channel PDCCH sent by the network device, so that the terminal device can use one RA-RNTI to perform PDCCH blind detection when repeatedly sending PRACH, effectively reducing the complexity of blind detection of the terminal device, reducing the energy consumption of the terminal device, and improving the communication efficiency of the system.

[0243] See Figure 9 , Figure 9 A schematic diagram of the structure of a random access device provided in an embodiment of the present application.

[0244] like Figure 9 As shown, the random access device 900 includes: a transceiver unit 910 and a processing unit 920, wherein:

[0245] The transceiver unit 910 is configured to receive a first random access message repeatedly sent by a terminal device on multiple random access opportunities;

[0246] The processing unit 920 is configured to determine a random access radio network temporary identifier RA-RNTI of the terminal device according to one of the multiple random access opportunities;

[0247] The transceiver unit 910 is further configured to send a second random access message or a physical downlink control channel PDCCH scrambled by the RA-RNTI to the terminal device.

[0248] Optionally, the processing unit 920 is specifically configured to:

[0249] Determining a target random access opportunity among the multiple random access opportunities according to the agreement;

[0250] The RA-RNTI of the terminal device is determined according to the target random access timing.

[0251] Optionally, the sequence number of the target random access opportunity is associated with the number of the multiple random access opportunities.

[0252] Optionally, the processing unit 920 is specifically configured to:

[0253] determining a target random access opportunity among the multiple random access opportunities;

[0254] Determine the RA-RNTI of the terminal device according to the target random access opportunity;

[0255] Send indication information to the terminal device, where the indication information is used to indicate the target random access timing.

[0256] Optionally, the processing unit 920 is specifically configured to:

[0257] determining, according to a system frame number SFN of a system frame in which the multiple random access opportunities are located, a target random access opportunity among the multiple random access opportunities;

[0258] The RA-RNTI of the terminal device is determined according to the target random access timing.

[0259] Optionally, sequence numbers of target random access opportunities in two groups of multiple random access opportunities in adjacent system frames are different.

[0260] The random access device of this embodiment can receive the secondary cell group failure information sent by the terminal device, and the secondary cell group failure information includes relevant information of the addition or change of the conditional primary and secondary cells PSCell, so that when the secondary cell group failure occurs, the network device can also obtain relevant information of the addition or change of the conditional primary and secondary cells PSCell, so that the network device can obtain relevant information of the secondary cell group failure more comprehensively, and then can more accurately analyze the cause of the secondary cell group failure, effectively improving the communication efficiency of the system.

[0261] In order to implement the above embodiment, the embodiment of the present application further proposes a communication device, comprising: a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory to enable the device to perform Figures 2 to 5 The method shown in the embodiment.

[0262] In order to implement the above embodiment, the embodiment of the present application further proposes a communication device, comprising: a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory to enable the device to perform Figure 7 The method shown in the embodiment.

[0263] In order to implement the above embodiment, the embodiment of the present application also proposes a communication device, comprising: a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, the processor is used to run the code instructions to execute Figures 2 to 5 The method shown in the embodiment.

[0264] In order to implement the above embodiment, the embodiment of the present application also proposes a communication device, comprising: a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, the processor is used to run the code instructions to execute Figure 7 The method shown in the embodiment.

[0265] See Figure 10 , Figure 10 This is a schematic diagram of the structure of another random access device provided in an embodiment of the present application. Random access device 1000 can be a network device, a terminal device, or a chip, chip system, or processor that supports the network device in implementing the above-mentioned method. It can also be a chip, chip system, or processor that supports the terminal device in implementing the above-mentioned method. This device can be used to implement the method described in the above-mentioned method embodiment. For details, please refer to the description of the above-mentioned method embodiment.

[0266] The random access device 1000 may include one or more processors 1001. The processor 1001 may be a general-purpose processor or a dedicated processor. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control the random access device (e.g., a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute computer programs, and process computer program data.

[0267] Optionally, the random access device 1000 may further include one or more memories 1002, on which a computer program 1003 may be stored. The processor 1001 executes the computer program 1003, so that the random access device 1000 performs the method described in the above method embodiment. The computer program 1003 may be fixed in the processor 1001. In this case, the processor 1001 may be implemented by hardware.

[0268] Optionally, data may also be stored in the memory 1002. The random access device 1000 and the memory 1002 may be provided separately or integrated together.

[0269] Optionally, the random access apparatus 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., and is configured to implement transceiver functions. The transceiver 1005 may include a receiver and a transmitter. The receiver may be referred to as a receiver or a receiving circuit, etc., and is configured to implement a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., and is configured to implement a transmitting function.

[0270] Optionally, the random access apparatus 1000 may further include one or more interface circuits 1007. The interface circuit 1007 is configured to receive code instructions and transmit the instructions to the processor 1001. The processor 1001 executes the code instructions to enable the random access apparatus 1000 to perform the method described in the above method embodiment.

[0271] In one implementation, processor 1001 may include a transceiver for implementing receiving and transmitting 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 transmitting functions may be separate or integrated. The transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or may be used for transmitting or delivering signals.

[0272] In one implementation, the random access device 1000 may include a circuit that can implement the functions of sending, receiving, or communicating in the aforementioned method embodiments. The processor and transceiver described in this application can be implemented on 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 can 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 channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0273] The random access device described in the above embodiments may be a network device or a terminal device, but the scope of the random access device described in this application is not limited thereto, and the structure of the random access device may not be limited thereto. Figure 8-Figure 9 The random access device may be an independent device or may be part of a larger device. For example, the random access device may be:

[0274] (1) An independent integrated circuit (IC), or chip, or chip system or subsystem;

[0275] (2) a collection of one or more ICs, optionally including a storage component for storing data and computer programs;

[0276] (3) ASIC, such as modem;

[0277] (4) Modules that can be embedded in other devices;

[0278] (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.;

[0279] (6)Others, etc.

[0280] For the case where the random access device can be a chip or a chip system, see Figure 11 Schematic diagram of the chip structure shown. Figure 11 The chip shown includes a processor 1101 and an interface 1102. There may be one or more processors 1101 and there may be more than one interface 1102.

[0281] For the case where the chip is used to implement the functions of the network device in the embodiment of the present application:

[0282] Interface 1102, used for transmitting code instructions to the processor;

[0283] Processor 1101 is used to execute code instructions to perform the following Figures 2 to 5 method.

[0284] For the case where the chip is used to implement the functions of the terminal device in the embodiments of the present application:

[0285] Interface 1102, used for transmitting code instructions to the processor;

[0286] Processor 1101 is used to execute code instructions to perform the following Figure 7 method.

[0287] Optionally, the chip further includes a memory 1103, which is used to store necessary computer programs and data.

[0288] Those skilled in the art will also appreciate that the various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. 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 for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of the present application.

[0289] The embodiment of the present application also provides a communication system, which includes the aforementioned Figure 8-Figure 9 In the embodiment, the random access device as a terminal device and the random access device as a network device, or the system includes the aforementioned Figure 10 In the embodiment, the random access device is used as a terminal device and the random access device is used as a network device.

[0290] The present application 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.

[0291] The present application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0292] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using 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 according to the embodiment of the present application 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 one website, computer, server or data center to another website, computer, server or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. Available media may be magnetic media (eg, floppy disks, hard disks, tapes), optical media (eg, high-density digital video discs (DVDs)), or semiconductor media (eg, solid state disks (SSDs)).

[0293] Those skilled in the art will understand that the various numerical numbers such as first and second involved in this application are only for the convenience of description and are not used to limit the scope of the embodiments of this application, and also indicate the order of precedence.

[0294] In this application, at least one can also be described as one or more, and multiple can be two, three, four or more, which is not limited in this application. In the embodiments of this application, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", and there is no order of precedence or size between the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0295] The correspondences shown in the tables in this application can be configured or predefined. The values ​​of the information in each table are examples only and can be configured to other values, which are not limited by this application. When configuring the correspondence between information and parameters, it is not necessarily required to configure all the correspondences shown in each table. For example, in the tables in this application, the correspondences shown in certain rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables can also use other names that can be understood by the communication device, and the values ​​or representations of the parameters can also use other values ​​or representations that can be understood by the communication device. When implementing the above tables, other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables, etc.

[0296] The predefined in this application may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0297] Those skilled 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 beyond the scope of this application.

[0298] Those skilled in the art will 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.

[0299] It should be understood that the various forms of processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the embodiments of the present application can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in the present invention can be achieved, and this document is not limited here.

[0300] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A random access method, characterized in that: The method is executed by a terminal device, and includes: Repeatingly sending a first random access message to a network device on multiple random access opportunities, wherein the multiple random access opportunities are located in the same uplink transmit beam; determining, according to a system frame number SFN of a system frame in which the multiple random access opportunities are located, one of the multiple random access opportunities as a target random access opportunity; Determining a random access radio network temporary identifier RA-RNTI of the terminal device according to the target random access opportunity; The RA-RNTI is used to detect a second random access message or a physical downlink control channel PDCCH sent by the network device.

2. The method according to claim 1, characterized in that The sequence numbers of the target random access opportunities in two groups of multiple random access opportunities in adjacent system frames are different.

3. A random access method, characterized in that: The method is performed by a network device, and includes: Receiving a first random access message repeatedly sent by a terminal device on multiple random access opportunities, wherein the multiple random access opportunities are located in the same uplink transmit beam; determining, according to a system frame number SFN of a system frame in which the multiple random access opportunities are located, one of the multiple random access opportunities as a target random access opportunity; Determining a random access radio network temporary identifier RA-RNTI of the terminal device according to the target random access opportunity; A second random access message or a physical downlink control channel PDCCH encrypted with the RA-RNTI is sent to the terminal device.

4. The method according to claim 3, characterized in that The sequence numbers of the target random access opportunities in two groups of multiple random access opportunities in adjacent system frames are different.

5. A random access device, characterized in that: The device is applied to a terminal device, and includes: a transceiver unit, configured to repeatedly send a first random access message to a network device on multiple random access opportunities, wherein the multiple random access opportunities are located in the same uplink transmit beam; A processing unit, configured to determine, according to a system frame number SFN of a system frame in which the multiple random access opportunities are located, one of the multiple random access opportunities as a target random access opportunity; The processing unit is further configured to determine a random access radio network temporary identifier RA-RNTI of the terminal device according to the target random access opportunity; The transceiver unit is further configured to use the RA-RNTI to detect a second random access message or a physical downlink control channel PDCCH sent by the network device.

6. The device according to claim 5, characterized in that The sequence numbers of the target random access opportunities in two groups of multiple random access opportunities in adjacent system frames are different.

7. A random access device, characterized in that: The device is applied to a network device, and includes: a transceiver unit, configured to receive a first random access message repeatedly sent by a terminal device on multiple random access opportunities, wherein the multiple random access opportunities are located in the same uplink transmit beam; A processing unit, configured to determine, according to a system frame number SFN of a system frame in which the multiple random access opportunities are located, one of the multiple random access opportunities as a target random access opportunity; The processing unit is further configured to determine a random access radio network temporary identifier RA-RNTI of the terminal device according to the target random access opportunity; The transceiver unit is further used to send a second random access message or a physical downlink control channel PDCCH encrypted with the RA-RNTI to the terminal device.

8. The device according to claim 7, characterized in that The sequence numbers of the target random access opportunities in two groups of multiple random access opportunities in adjacent system frames are different.

9. A communication device, characterized in that: The device includes a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device performs the method according to any one of claims 1 to 2.

10. A communication device, characterized in that: The device includes a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device performs the method according to any one of claims 3 to 4.

11. A communication device, characterized in that: include: processor and interface circuits; The interface circuit is used to receive code instructions and transmit them to the processor; The processor is configured to run the code instructions to perform the method according to any one of claims 1 to 2.

12. A communication device, characterized in that: include: processor and interface circuits; The interface circuit is used to receive code instructions and transmit them to the processor; The processor is configured to run the code instructions to perform the method according to any one of claims 3 to 4.

13. A computer-readable storage medium storing instructions, which, when executed, enable the method according to any one of claims 1 to 2 to be implemented.

14. A computer-readable storage medium storing instructions, which, when executed, enable the method according to any one of claims 3 to 4 to be implemented.

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