WO2020124763A1

WO2020124763A1 - Random access method and device

Info

Publication number: WO2020124763A1
Application number: PCT/CN2019/075125
Authority: WO
Inventors: 徐伟杰; 贺传峰
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-12-21
Filing date: 2019-02-14
Publication date: 2020-06-25
Also published as: WO2020124598A1; CN111989978A; CN111989978B

Abstract

Disclosed is a random access method, capable of realizing effective transmission of a channel in a two-step random access process. The method comprises: a network device generating a first random access radio network temporary identifier (RA-RNTI) according to a random access preamble index (RAPID) and resource information of a physical uplink shared channel (PUSCH) in a first message of a two-step random access process; and the network device using the first RA-RNTI to scramble a physical downlink control channel (PDCCH) in a second message of the two-step random access process, and/or using the first RA-RNTI to descramble the PUSCH.

Description

Random access method and equipment

This application requires the priority of the PCT patent application filed on December 21, 2018 in the Chinese Patent Office, application number PCT/CN2018/122864, with the invention titled "Random Access Methods and Equipment", the entire contents of which are incorporated by reference in this.

Technical field

Embodiments of the present application relate to the field of communications, and more specifically, to random access methods and devices.

Background technique

The random access (Random Access, RA) process of the 5G system or New Radio (NR) system allows 2-step random access (2-step RA). Among them, in the 2-step random access process, messages (Message, abbreviated as "Msg") 1 and Msg 3 in the 4-step random access (4-step RA) process can be sent as the first message, and Send Msg2 and Msg4 in the 4-step random access process as the second message. In the 2-step random access process, it is necessary to use RNTI to scramble and descramble the first message and the second message-related channels. Therefore, how to effectively generate RNTI that can be used to identify the terminal device by the terminal device and the network device becomes urgent. solved problem.

Summary of the invention

Embodiments of the present application provide a random access method and device, which can effectively obtain RA-RNTI in a 2-step random access process.

In a first aspect, a random access method is provided, including: a terminal device generating a first RA-RNTI according to RAPID and PUSCH resource information in a first message of a 2-step random access process.

Optionally, the method further includes: the terminal device using the first RA-RNTI to scramble the PUSCH, and/or using the first RA-RNTI to descramble the 2-step random access process PDCCH in the second message.

In a second aspect, a random access method is provided, which includes: a network device generating a first RA-RNTI according to RAPID and PUSCH resource information in a first message of a 2-step random access process.

Optionally, the method further includes: the network device using the first RA-RNTI to scramble the PDCCH in the second message of the 2-step random access process, and/or using the first The RA-RNTI descrambles the PUSCH.

In a third aspect, a random access method is provided, including: a terminal device generating a first RA-RNTI according to PUSCH resource information in a first message of a 2-step random access process.

Optionally, the method further includes: the terminal device generating a scrambling code sequence according to the first RA-RNTI, and scrambling the PUSCH in the first message using the scrambling code sequence; and/ Or, the terminal device uses the first RA-RNTI to descramble the PDCCH in the second message of the 2-step random access process.

According to a fourth aspect, a random access method is provided, which includes: a network device generating a first RA-RNTI according to PUSCH resource information in a first message of a 2-step random access process.

Optionally, the method further includes: the network device using the first RA-RNTI to scramble the PDCCH in the second message of the 2-step random access process; and/or the network device according to The first RA-RNTI generates a scrambling code sequence, and uses the scrambling code sequence to descramble the PUSCH in the first message.

According to a fifth aspect, a terminal device is provided, which can execute the method in the first aspect or any optional implementation manner of the first aspect. Specifically, the terminal device may include a functional module for performing the method in the first aspect or any possible implementation manner of the first aspect.

According to a sixth aspect, a network device is provided, which can execute the method in the second aspect or any optional implementation manner of the second aspect. Specifically, the network device may include a functional module for performing the method in the second aspect or any possible implementation manner of the second aspect.

In a seventh aspect, a terminal device is provided, which can execute the method in the third aspect or any optional implementation manner of the third aspect. Specifically, the terminal device may include a functional module for performing the method in the third aspect or any possible implementation manner of the third aspect.

In an eighth aspect, a network device is provided, which can execute the method in the fourth aspect or any optional implementation manner of the fourth aspect. Specifically, the network device may include a functional module for performing the method in the fourth aspect or any possible implementation manner of the fourth aspect.

In a ninth aspect, a terminal device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the first aspect or any possible implementation manner of the first aspect.

In a tenth aspect, a network device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the method in the second aspect or any possible implementation manner of the second aspect.

In an eleventh aspect, a terminal device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the third aspect or any possible implementation manner of the third aspect.

In a twelfth aspect, a network device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the fourth aspect or any possible implementation manner of the fourth aspect.

In a thirteenth aspect, a chip is provided for implementing the method in the first aspect or any possible implementation manner of the first aspect. Specifically, the chip includes a processor for calling and running a computer program from the memory, so that the device installed with the chip executes the method in the first aspect or any possible implementation manner of the first aspect.

According to a fourteenth aspect, a chip is provided for implementing the method in the second aspect or any possible implementation manner of the second aspect. Specifically, the chip includes a processor for calling and running a computer program from the memory, so that the device installed with the chip executes the method in the second aspect or any possible implementation manner of the second aspect.

In a fifteenth aspect, a chip is provided for implementing the method in the third aspect or any possible implementation manner of the third aspect. Specifically, the chip includes a processor for calling and running a computer program from the memory, so that the device installed with the chip executes the method in the third aspect or any possible implementation manner of the third aspect.

According to a sixteenth aspect, a chip is provided for implementing the method in the fourth aspect or any possible implementation manner of the fourth aspect. Specifically, the chip includes a processor for calling and running a computer program from the memory, so that the device installed with the chip executes the method in the fourth aspect or any possible implementation manner of the fourth aspect.

In a seventeenth aspect, a computer-readable storage medium is provided for storing a computer program that causes a computer to execute the method in the first aspect or any possible implementation manner of the first aspect.

In an eighteenth aspect, a computer-readable storage medium is provided for storing a computer program that causes a computer to execute the method in the second aspect or any possible implementation manner of the second aspect.

In a nineteenth aspect, a computer-readable storage medium is provided for storing a computer program that causes a computer to execute the method in the third aspect or any possible implementation manner of the third aspect.

In a twentieth aspect, a computer-readable storage medium is provided for storing a computer program that causes a computer to execute the method in the fourth aspect or any possible implementation manner of the fourth aspect.

In a twenty-first aspect, a computer program product is provided, including computer program instructions that cause a computer to execute the method in the first aspect or any possible implementation manner of the first aspect.

In a twenty-second aspect, a computer program product is provided, including computer program instructions that cause a computer to execute the method in the second aspect or any possible implementation manner of the second aspect.

In a twenty-third aspect, a computer program product is provided, including computer program instructions that cause a computer to execute the method in the third aspect or any possible implementation manner of the third aspect.

In a twenty-fourth aspect, a computer program product is provided, which includes computer program instructions, which cause the computer to execute the method in the fourth aspect or any possible implementation manner of the fourth aspect.

In a twenty-fifth aspect, a computer program is provided, which when run on a computer, causes the computer to execute the method in the first aspect or any possible implementation manner of the first aspect.

In a twenty-sixth aspect, a computer program is provided, which when run on a computer, causes the computer to execute the method in the second aspect or any possible implementation manner of the second aspect.

According to a twenty-seventh aspect, a computer program is provided, which when run on a computer, causes the computer to execute the method in the third aspect or any possible implementation manner of the third aspect.

In a twenty-eighth aspect, a computer program is provided, which when run on a computer, causes the computer to execute the method in the fourth aspect or any possible implementation manner of the fourth aspect.

In a twenty-ninth aspect, a communication system is provided, including a terminal device and a network device.

The terminal device is used to generate the first RA-RNTI according to the RAPID and PUSCH resource information in the first message of the 2-step random access process. Optionally, the first RA-RNTI is used to scramble the PUSCH, and/or to descramble the PDCCH in the second message of the 2-step random access process.

The network device is used to generate RA-RNTI according to the RAPID and PUSCH resource information in the first message of the 2-step random access process. Optionally, the RA-RNTI is used to scramble the physical downlink control channel PDCCH in the second message of the 2-step random access process, and/or to descramble the PUSCH.

According to a thirtieth aspect, a communication system is provided, including a terminal device and a network device.

The terminal device is used for: the terminal device generates the first RA-RNTI according to the PUSCH resource information in the first message of the 2-step random access process. Optionally, the first RA-RNTI is used to descramble the PDCCH in the second message of the 2-step random access process, and/or to generate a scrambling code sequence, and the scrambling code sequence is used to Scrambling the PUSCH in the first message.

The network device is used to generate the first RA-RNTI according to the PUSCH resource information in the first message of the 2-step random access process. Optionally, the first RA-RNTI is used to scramble the PDCCH in the second message of the 2-step random access process, and/or to generate a scrambling code sequence, and the scrambling code sequence is used to Descramble the PUSCH in the first message.

Through the above technical solution, the terminal device and the network device determine the first RA-RNTI according to the resource information of RAPID and PUSCH, so as to effectively obtain the RA-RNTI in the 2-step random access process. The first RA-RNTI can uniquely identify the terminal device, thereby completing the descrambling of the first message and the second message in the 2-step random access process, further ensuring the effectiveness of the channel in the 2-step random access process transmission.

BRIEF DESCRIPTION

FIG. 1 is a schematic diagram of a possible wireless communication system applied in an embodiment of the present application.

2 is a schematic flow interaction diagram of 4-step random access.

Figure 3 is a schematic process interaction diagram of 2-step random access

4 is a schematic flowchart of a random access method according to an embodiment of the present application.

FIG. 5 is a schematic flowchart of a random access method according to an embodiment of the present application.

6 is a schematic flowchart of a random access method according to an embodiment of the present application.

7 is a schematic flowchart of a random access method according to an embodiment of the present application.

FIG. 8 is a schematic diagram of transmission of the first message in a 2-step random access process according to an embodiment of the present application.

9 is a schematic diagram of transmission of a second message in a 2-step random access process according to an embodiment of the present application.

10 is a schematic block diagram of a terminal device according to an embodiment of the present application.

11 is a schematic block diagram of a network device according to an embodiment of the present application.

12 is a schematic block diagram of a terminal device according to an embodiment of the present application.

13 is a schematic block diagram of a network device according to an embodiment of the present application.

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

15 is a schematic structural diagram of a chip according to an embodiment of the present application.

16 is a schematic block diagram of a communication system according to an embodiment of the present application.

17 is a schematic block diagram of a communication system according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present application.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System (Mobile) (GSM) system, Code Division Multiple Access (CDMA) system, broadband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed band (LTE-based access to unlicensed spectrum, LTE-U) system, NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed band, Universal Mobile Telecommunication System (Universal Mobile Telecommunication System, UMTS), global Worldwide Interoperability for Microwave Access (WiMAX) communication system, wireless local area network (Wireless Local Area Areas, WLAN), wireless fidelity (Wireless Fidelity, WiFi), next-generation communication system or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technologies, mobile communication systems will not only support traditional communication, but also support, for example, device to device (Device to Device, D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and vehicle-to-vehicle (V2V) communication, etc. The embodiments of the present application can also be applied to these communications system.

Optionally, the communication system in the embodiments of the present application may be applied in scenarios such as carrier aggregation (CA), dual connectivity (DC), and standalone (SA) networking.

Exemplarily, the communication system 100 applied in the embodiment of the present application is shown in FIG. 1. The wireless communication system 100 may include a network device 110. The network device 110 may be a device that communicates with a terminal device. The network device 110 can provide communication coverage for a specific geographic area, and can communicate with terminal devices located within the coverage area. Optionally, the network device 100 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the network side device in the NR system, or the wireless controller in the Cloud Radio Access Network (CRAN), or the network device can be a relay station, Incoming points, in-vehicle devices, wearable devices, network-side devices in next-generation networks, or network devices in future public land mobile networks (Public Land Mobile Network, PLMN), etc.

The wireless communication system 100 further includes at least one terminal device 120 located within the coverage of the network device 110. The terminal device 120 may be mobile or fixed. Optionally, the terminal device 120 may refer to an access terminal, user equipment (User Equipment, UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication Device, user agent, or user device. Access terminals can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital processing (Personal Digital Assistant (PDA), wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks, or terminal devices in future evolved PLMNs, etc. Among them, optionally, the terminal devices 120 may also perform terminal direct connection (Device to Device, D2D) communication.

The network device 110 may provide services to a cell, and the terminal device 120 communicates with the network device 110 through transmission resources (eg, frequency domain resources, or spectrum resources) used by the cell, and the cell may be the network device 110 (eg, base station) Corresponding cell, the cell may belong to a macro base station, or a base station corresponding to a small cell (Small cell), where the small cell may include, for example, a metro cell, a micro cell, and a pico cell , Femtocells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

FIG. 1 exemplarily shows one network device and two terminal devices. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within the coverage area. The application examples do not limit this. In addition, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiments of the present application.

After the cell search process, the terminal device has achieved downlink synchronization with the cell, so the terminal device can receive downlink data. However, the terminal device can perform uplink transmission only if it has achieved uplink synchronization with the cell. The terminal device can establish a connection with the cell and obtain uplink synchronization through a random access procedure (Random Access Procedure, RAR). That is to say, through random access, the terminal device can obtain uplink synchronization, and obtain the unique identifier assigned to it by the network device, namely the Cell Radio Network Temporary Identity (C-RNTI). Therefore, random access can be applied not only in initial access, but also in the case where the user's uplink synchronization is lost. For ease of understanding, the random access process will be briefly described below in conjunction with FIGS. 2 and 3.

The random access process can usually be triggered by one of the following 6 types of trigger events:

(1) Initial access.

The terminal equipment will enter the RRC connected state (RRC_CONNECTED) from the Radio Resource Control (RRC) idle state (RRC_IDLE state).

(2) Handover.

When the terminal device needs to establish uplink synchronization with the new cell, it needs to initiate random access in the new cell.

(3) RRC connection re-establishment (RRC Connection Re-establishment).

The terminal equipment re-establishes a wireless connection after a radio link failure (Radio Link Failure, RLF) occurs.

(4) In the RRC connection state, when the downlink data arrives, the uplink is in the "out of synchronization" state.

At this time, after the downlink data arrives, the terminal device needs to reply (Acknowledgement, ACK) or negative response (Negative Acknowledgement, NACK).

(5) In the RRC connected state, when the uplink data arrives, the uplink is in the "out-of-sync" state or no physical uplink control channel (Physical Uplink Control Channel, PUCCH) resources are available for scheduling request (SR) transmission.

When uplink data arrives, for example, when it is necessary to report a measurement report or send data, if the uplink is in the "out-of-synchronization" state, the terminal device may initiate a random access procedure; Access (Channel, RACH) to replace the role of SR, then when the uplink is in the "out of sync" state, the terminal device can initiate a random access process.

(6) In the RRC connected state, in order to locate, it is necessary to obtain the timing advance (TAming Advance).

In addition, random access may also be triggered due to RRC active state (RRC_INACTIVE) transition, requesting other system information (Other System Information), or beam failure recovery (beam failure recovery).

FIG. 2 is a flow interaction diagram of 4-step random access. As shown in Figure 2, the 4-step random access process may include the following four steps:

Step 1: The terminal device sends Msg1.

The terminal device sends Msg1 to the network device to tell the network device that the terminal device initiated a random access request. The Msg1 carries a random access preamble (Random Access Preamble, RAP), or random access preamble, Preamble, preamble, etc. At the same time, Msg1 can also be used for network equipment to estimate the transmission delay between it and the terminal equipment and to calibrate the uplink time.

Step 2: The network device sends Msg2.

After receiving the Msg1 sent by the terminal device, the network device sends Msg2, a random access response (Random Access Response, RAR) message, to the terminal device. The Msg2 can be scrambled by a random access wireless network temporary identity (Random Access Radio Network Temporary Identity, RA-RNTI). The terminal device can monitor the physical downlink control channel (Physical Downlink Control Channel, PDCCH) in the RAR window (RAR window) to receive the RAR message scrambled by the RA-RNTI, without considering the possible measurement interval (measurement gap) .

If the terminal device does not receive the RAR message returned by the network device within the RAR window, it is considered that the random access has failed this time. If the terminal device successfully receives a RAR message within the RAR window and the index of the preamble carried in the RAR message is the same as the index of the preamble in Msg1 sent by the terminal device, the terminal device may stop listening to the RAR message. Among them, the terminal device uses RA-RNTI to descramble the RAR message.

The RAR message may include corresponding messages for multiple terminal devices that send preambles, and the response message for each terminal device includes the random access preamble index (Random Access Preamble Identify, RAPID ), Msg3 resource allocation information, time advancement (TA) adjustment information, and temporary cell wireless network temporary identification (Temporary Cell-Radio Network Temporary Identity, TC-RNTI), etc.

In the NR standard, the RAR message can be scheduled using a Download Control (Information, DCI) format (DCI) 1-0, and the PDCCH scheduling the RAR message can be scrambled using the above-mentioned RA-RNTI.

Step 3: The terminal device sends Msg3.

After receiving the RAR message, the terminal device determines whether the RAR is its own RAR message. For example, the terminal device can use the preamble identifier to check. After determining that it is its own RAR message, it generates Msg3 at the RRC layer and sends The network device sends Msg3. It needs to carry the identification information of the terminal device, etc.

For different random access trigger events, the Msg 3 sent by the terminal device in step 3 in the 4-step random access process may include different content.

For example, for the initial access scenario, Msg3 includes an RRC connection request message (RRC Connection Request) generated by the RRC layer, which carries at least the non-access Stratum (NAS) identification information of the terminal device. In addition, Msg3 can also carry, for example, a serving temporary mobile subscriber identity (Serving-Temporary Mobile Subscriber Identity, S-TMSI) or random number of the terminal device.

For another example, for the RRC connection re-establishment scenario, Msg3 includes an RRC connection re-establishment request message (RRC Connection Re-establishment Request) generated by the RRC layer and does not carry any NAS message. In addition, Msg3 can also carry cell radio network temporary identifier (Cell Radio Network Identifier, C-RNTI) and protocol control information (Protocol Control Information, PCI).

For another example, for the handover scenario, Msg3 includes an RRC handover confirmation message (RRC Handover Confirm) generated by the RRC layer, which carries the C-RNTI of the terminal device. In addition, Msg3 can also carry information such as Buffer Status Report (Buffer Status Report, BSR). For other trigger events such as the arrival of uplink/downlink data, Msg3 needs to include at least the C-RNTI of the terminal device.

It should be noted that uplink transmission usually uses terminal device-specific information, such as C-RNTI to scramble data carried in an uplink shared channel (Uplink Shared Channel, UL-SCH). But at this time the conflict has not been resolved, so when scrambling Msg3 cannot be based on C-RNTI, but can only use TC-RNTI.

Step 4. The network device sends Msg4.

The network device sends Msg4 to the terminal device, and the terminal device correctly receives Msg4 to complete Contention Resolution. For example, in the RRC connection establishment process, Msg 4 may carry the RRC connection establishment message.

Since the terminal device in step 3 will carry its own unique identification in Msg3, such as C-RNTI or identification information from the core network (such as S-TMSI or a random number), the network device will Carry the unique identification of the terminal equipment in Msg4 to designate the terminal equipment that won the competition. And other terminal devices that do not win in the contention resolution will re-initiate random access. The PDCCH of Msg4 can be scrambled using TC-RNTI.

In the 5G system, when the terminal device performs random access, in addition to the above-mentioned 4-step random access method for random access, a 2-step random access method can also be used. One possible method is to send the messages Msg1 and Msg3 in the 4-step random access process as the first message in the 2-step random access process; send the Msg2 and 4 in the 4-step random access process Msg4 is sent as the second message in the 2-step random access process.

As shown in Figure 3, the 2-step random access process may include the following two steps:

Step 1: The terminal device sends the first message.

The first message (also called "Msg A or New Msg 1 (New_Msg 1)") may include a preamble and uplink data. The uplink data may be carried on an uplink channel, and the uplink channel may be, for example, a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH). Wherein, the uplink channel may carry the identification information of the terminal device and the reason of the RRC request, for example. The first message may carry some or all of the information carried in Msg1 and Msg3 in the 4-step random access process.

Step 2: The network device sends a second message.

If the network device successfully receives the first message sent by the terminal device, it sends a second message to the terminal device. The second message (also referred to as "Msg B or New Msg 2 (New_Msg 2)") may include conflict resolution information, C-RNTI allocation information, TA adjustment information, etc., for example. The second message may carry some or all of the information carried in Msg 2 and Msg 4 during the 4-step random access process.

In the 2-step random access process, the second message carries conflict resolution information for a single terminal device (including information related to the identification of the terminal device sent by the terminal device in the first message), C-RNTI allocation information, TA adjustment information, etc. In addition, the second message may also carry an RRC connection establishment message and so on.

It should be understood that FIG. 2 or FIG. 3 is merely an example. Since the two-step random access process has not yet entered the standardization stage, here is only introduced as an example in Figure 3, there are other possibilities for the definition of each random access message involved, and does not limit the two-step random access Other definitions of each random access message in the process. The method described in the embodiment of the present application is applicable to all other 2-step random access processes.

In the 4-step random access process, the network device can allocate wireless network temporary identification (Radio Network Temporary Identity, RNTI) information to the terminal device through Msg2, while in the 2-step random access process, the terminal device receives the second Before the message, the RNTI information configured by the network device may not be received, so the terminal device cannot be identified during the transmission of the first message and the second message, and the first message and the second message cannot be effectively transmitted. Upstream and downstream channels in a message.

Therefore, the embodiments of the present application provide a random access method, which can effectively obtain the RA-RNTI in the 2-step random access process, and further realize the effective transmission of the channel.

In the embodiment of the present application, the first message and the second message in the 2-step random access process are also referred to as "Msg A or new Msg 1 (New_Msg 1)" and "Msg B or new Msg 2 (New_Msg 2)", the first message to the fourth message in the 4-step random access process are also called "Msg1, Msg2, Msg3, and Msg4", respectively. Among them, MsgA may include some or all of the information carried in Msg1 and Msg3. Msg B may include some or all of the information carried in Msg 2 and Msg 4.

In addition, to distinguish it from the RA-RNTI used in the 4-step random access process, the RA-RNTI in the 2-step random access process in the embodiment of the present application may be referred to as a first RA-RNTI or a new RA-RNTI (New_RA- RNTI), etc., not limited here.

FIG. 4 is a schematic flowchart of a random access method 400 according to an embodiment of the present application. The method described in FIG. 4 may be executed by a terminal device, and the terminal device may be, for example, the terminal device 120 shown in FIG. 1. As shown in FIG. 4, the random access method 400 may include some or all of the following steps. among them:

In 410, the terminal device generates the first RA-RNTI according to the RAPID in the first message of the two-step random access process and the resource information of the physical uplink shared channel (Physical Uplink Shared Channel, PUSCH).

Optionally, the method further includes 420.

In 420, the terminal device uses the first RA-RNTI to scramble the PUSCH in the first message; and/or, the terminal device uses the first RA-RNTI to descramble the second message of the 2-step random access process In the PDCCH.

The first message of the 2-step random access process may include, for example, a preamble and/or data channel. The first message may carry some or all of the information in Msg1 and Msg3 in the 4-step random access process. The data channel can be scrambled and descrambled using the first RA-RNTI, for example. Optionally, when the data channel in the first message sent by the terminal device, such as PUSCH transmission fails, and the network device schedules the terminal device to retransmit the data channel, the first RA-RNTI may be used to descramble and schedule the data The control channel of the channel is, for example, PDCCH.

Optionally, in 420, the terminal device scrambling the PUSCH using the first RA-RNTI includes: the terminal device generating a scrambling code sequence according to the first RA-RNTI; the terminal device uses The scrambling code sequence scrambles the PUSCH in the first message.

For example, the initial value of the scrambling code sequence is:

c _init =n _RNTI ×2 ¹⁵ +n _ID .

among them,

Is a physical cell identity (Identity, ID), and n _{RNTI is} the first RA-RNTI.

The second message of the 2-step random access process includes, for example, a RAR message and/or a conflict resolution message. The second message may carry some or all of the information in Msg 2 and Msg 4 during the 4-step random access process. Wherein, all the information can be carried in a data channel such as PDSCH, and the control channel for scheduling the data channel such as PDCCH can be scrambled and descrambled using the first RA-RNTI.

The terminal device may generate the first RA-RNTI according to the RAPID and/or PUSCH resource information in the first message of the 2-step random access process. And use the first RA-RNTI to scramble the PUSCH in the first message, and/or descramble the PDCCH in the second message of the 2-step random access process. Therefore, when the network device does not allocate the RNTI to the terminal device, the terminal device can be identified, and the channel can be scrambled and descrambled to ensure the effective transmission of the channel in the 2-step random access process.

For example, the terminal device may use the first RA-RNTI to descramble the cyclic redundancy check (Cyclic Redundancy Check, CRC) check bits of the PDCCH in the second message.

For another example, the terminal device may use the first RA-RNTI to scramble the encoded information bits on the PUSCH in the first message.

In the embodiment of the present application, the "PDCCH in the second message" may be understood as that the PDCCH is used to schedule the PDSCH in the second message, that is, the PDCCH is used to schedule the bearer of RAR messages and/or PDSCH of the conflict resolution message. In the following, as an example, the PDCCH used for scheduling the PDSCH in the second message is taken as a part of the second message, but the application is not limited to this, and the second message may also be considered to include only the data channel .

Here, the resources of the PUSCH in the first message may include, for example, resources for transmitting the PUSCH and resources of the demodulation reference signal (DMRS) corresponding to the PUSCH, which refers to the PUSCH The time-frequency resource includes the time-frequency resource used to transmit the PUSCH and the time-frequency resource of the DMRS.

Optionally, when initiating random access, the terminal device may randomly select a preamble for random access among multiple preambles. Since the terminal device randomly selects the preamble, different terminal devices can greatly reduce the probability of collision of preamble sequences while selecting among multiple preamble sequences. Alternatively, the terminal device may also select the preamble based on other methods.

Optionally, there may be a correspondence between the preamble and the resource transmitting PUSCH. Among them, one preamble can correspond to multiple PUSCH resources; one PUSCH resource can correspond to multiple preambles; or, there is a one-to-one correspondence between the preamble and PUSCH resources.

There is a one-to-one correspondence between the current pilot code and the PUSCH resource, or one PUSCH resource corresponds to multiple PUSCH resources, and the terminal device may generate the first RA-RNTI according to RAPID. However, when one PUSCH resource corresponds to multiple PUSCH resources, the terminal device needs to generate the first RA-RNTI according to the RAPID and PUSCH resource information at the same time to ensure that the first RA-RNTI corresponding to the terminal device is unique.

In this embodiment, the terminal device determines its corresponding first RA-RNTI according to the RAPID and PUSCH resource information, and uses the first RA-RNTI to scramble the first message in the 2-step random access process, and /Or, descramble the second message in the 2-step random access process. Therefore, when the network device does not allocate the RNTI to it, it can realize the identification of the terminal device, complete the addition and descrambling of the channel, and ensure the effective transmission of the channel in the 2-step random access process.

Optionally, the resource information of the PUSCH includes the resource index of the PUSCH.

The resource index of the PUSCH is, for example, an index of a demodulation reference signal (DMRS) corresponding to the PUSCH. The DMRS is used to demodulate the PUSCH.

For example, in multiple PUSCH resources with the same time-frequency position, the index of each PUSCH resource is the index of the DMRS corresponding to the PUSCH transmitted on the PUSCH resource. Assuming that 12 different DMRS sequences can be supported within the same time-frequency resource for PUSCH transmission, the PUSCH time-frequency resource can support a maximum of 12 PUSCH transmissions, and the resource index values of these 12 PUSCHs It can be 0, 1, ..., 11 or 1, 2, ..., 12 in sequence. The 12 PUSCH resources with different indexes are located in the same time-frequency position, and the PUSCH transmitted on the PUSCH resources with different indexes are distinguished by different DMRS.

When the RAPID in the first message corresponds to multiple PUSCH resources, the resource index of the PUSCH is, for example, the resource number of the PUSCH resource in the multiple PUSCH resources in the first message.

For example, the RAPID selected by the terminal device corresponds to N PUSCH resources, and the indexes of the N PUSCH resources are index 0, index 1, ..., and index N in this order. If the terminal device uses the second PUSCH resource among the N PUSCH resources, the resource index used to calculate the PUSCH used by the first RA-RNTI is index 1.

Optionally, in 410, the terminal device generates the first RA-RNTI according to the RAPID and PUSCH resource information in the first message of the 2-step random access process, which includes: the terminal device according to the first message in the first message The resource information of the RAPID and PUSCH and the resource information of the physical random access channel (Physical Random Access Channel, PRACH) used to send the preamble generate the first RA-RNTI.

Wherein, the PRACH resource information includes, for example, at least one of the following information: the position of the Orthogonal Frequency Division Multiplexing (OFDM) symbol occupied by the PRACH resource in the time domain, and the PRACH resource in the system frame The position of the time slot occupied in, the number of the resource occupied by the PRACH resource in the frequency domain, and whether the PRACH resource uses a normal uplink carrier or a single uplink carrier in the frequency domain.

For example, the terminal device may generate the first RA-RNTI based on the following formula:

The first RA-RNTI=1+PUSCH_index+PUSCH_number×RAP_id+PUSCH_number×preamble_number×s_id+PUSCH_number×preamble_number×symbol_number×t_id+PUSCH_number×preamble_number×symbol_number×slot_number×f_id+PUSCH_number×preamble_number×symbol_number×frequency_number×frequency_number×symbol_number

Where RAP_id is the index of the preamble sent by the terminal device, that is, RAPID, 0≤RAP_id<preamble_number; PUSCH_index is the resource number of the PUSCH resource in the first message in the multiple PUSCH resources corresponding to the preamble, 0≤PUSCH_index <PUSCH_number, where the current pilot code corresponds to the PUSCH resource one-to-one or one PUSCH resource corresponds to multiple preambles, PUSCH_index=0; s_id is the first OFDM of the PRACH resource used to send the random access preamble Symbol, 0≤s_id<symbol_number; t_id is the index of the first slot of the PRACH resource used to send the random access preamble, 0≤t_id<slot_number; f_id is the PRACH resource in the frequency domain Resource number, 0≤f_id<frequency_number; ul_carrier_id is the uplink carrier (UL carrier) used to send the random access preamble. A value of 0 indicates a normal uplink carrier, and a value of 1 indicates a single uplink carrier.

Where preamble_number is the total number of preambles used for 2-step random access within a PRACH opportunity; PUSCH_number is the number of PUSCH resources corresponding to the preamble sent by the terminal device, where the current preamble and PUSCH resources are the same When a corresponding or one PUSCH resource corresponds to multiple preambles, PUSCH_number=1; symbol_number is the total possible index number of the starting symbol of PRACH occupation used in 2-step random access, slot_number is used in 2-step random access The total number of indexes of the first slot index in the slot where PRACHoccasion is located; frequency_number is the total number of frequency domain indexes of PRACHoccasion used in 2-step random access.

The terminal device may substitute its preamble index and PUSCH resource information into the formula according to the formula, so as to obtain the first RA-RNTI.

For example, when preamble_number=64, symbol_number=14, slot_number=80, frequency_number=8, PUSCH_index=0, PUSCH_number=1 in the above formula, the above formula can become:

The first RA-RNTI=1+RAP_id+64×s_id+64×14×t_id+64×14×80×f_id+64×14×80×8×ul_carrier_id.

Bring the index information of RAP_id and PUSCH, and the resource information of PRACH, that is, s_id, t_id, f_id, and ul_carrier_id into the formula to obtain the first RA-RNTI.

Among them, PUSCH_index, PUSCH_number, preamble_number, symbol_number, slot_number, frequency_number and other parameters may also be other values. Optionally, all or part of these parameter values may be determined and configured by the network device to the terminal device, or agreed in advance in the protocol; or, some of these parameter values may be determined and configured by the network device to the terminal device , And the value of another part of the parameter can be agreed by the agreement.

For another example, the terminal device may generate the first RA-RNTI based on the following formula:

The first RA-RNTI=PUSCH_index×RAP_id; or,

The first RA-RNTI=PUSCH_index×RAP_id+RNTI_offset.

Where, RAP_id is the index of the preamble sent by the terminal device, that is, RAPID, 0≤RAP_id<preamble_number, where preamble_number≤63; PUSCH_index is the index of the DMRS corresponding to the PUSCH in the first message.

Wherein, RNTI_offset is an offset value, which may be configured by the network device to the terminal device through signaling, or may be stipulated in the agreement by the network device and the terminal device in advance.

Optionally, in the above method for determining the first RA-RNTI, the RAP_id may be replaced by a synchronization signal block (Synchronizing Signal/PBCH Block, SSB or SS/PBCH Block) index (SSB index), so that the terminal device can The first RA-RNTI is generated according to the SSB index and/or PUSCH resource information in the first message. For example, the terminal device may determine the RA-RNTI according to the following formula:

The first RA-RNTI=1+PUSCH_index+PUSCH_number×SSB_index+PUSCH_number×SSB_number×s_id+PUSCH_number×SSB_number×symbol_number×t_id+PUSCH_number×SSB_number×symbol_number×slot_number×f_id+PUSCH_number×SSB_number×symbol_number×frequency_number×symbol_number×frequency_number×symbol_number

Among them, SSB_index is the SSB index of the terminal device, 0≤SSB_index<SSB_number; PUSCH_index is the resource number of the multiple PUSCH resources corresponding to the preamble used by the PUSCH resource in the first message, 0≤PUSCH_index<PUSCH_number, where , When the current preamble corresponds to the PUSCH resource or one PUSCH resource corresponds to multiple preambles, PUSCH_index=0; s_id is the first OFDM symbol of the PRACH resource used to send the random access preamble, 0≤ s_id<symbol_number; t_id is the index of the first slot of the PRACH resource used to send the random access preamble, 0≤t_id<slot_number; f_id is the resource number of the PRACH resource in the frequency domain, 0 ≤f_id<frequency_number; ul_carrier_id is the uplink carrier (UL carrier) used to send the random access preamble. A value of 0 indicates a normal uplink carrier, and a value of 1 indicates a single uplink carrier.

Among them, SSB_number is the total number of SSB indexes used in an SSB cluster set (SSB burst); PUSCH_number is the number of PUSCH resources corresponding to the preamble sent by the terminal device, where the current pilot code corresponds to the PUSCH resource Or one PUSCH resource corresponds to multiple preambles, PUSCH_number=1; symbol_number is the total possible index number of the starting symbol of the PRACH occupation used in 2-step random access, slot_number is the PRACH occupation used in 2-step random access The total index number of the first slot index in the slot where frequency is; frequency_number is the total number of frequency domain indexes of the PRACHoccasion used for 2-step random access.

First RA-RNTI=PUSCH_index×SSB_index; or,

The first RA-RNTI=PUSCH_index×SSB_index+RNTI_offset.

Among them, SSB_index is the SSB index of the terminal device; PUSCH_index is the index of the DMRS corresponding to the PUSCH in the first message.

FIG. 5 is a schematic flowchart of a random access method 500 according to an embodiment of the present application. The method described in FIG. 5 may be performed by a network device, and the network device may be, for example, the network device 110 shown in FIG. 1. As shown in FIG. 5, the random access method 500 may include some or all of the following steps. among them:

In 510, the network device generates the first RA-RNTI according to the RAPID and PUSCH resource information in the first message of the 2-step random access process.

Optionally, the method further includes 520.

In 520, the network device uses the first RA-RNTI to scramble the PDCCH in the second message of the 2-step random access process; and/or, the network device uses the first RA-RNTI to descramble the PUSCH.

Optionally, in 520, the network device using the first RA-RNTI to descramble the PUSCH includes: the network device generating a scrambling code sequence according to the first RA-RNTI; the network device uses The scrambling code sequence descrambles the PUSCH in the first message.

For example, the initial value of the scrambling code sequence is:

c _init =n _RNTI ×2 ¹⁵ +n _ID .

among them,

Is the physical cell identity, and n _{RNTI is} the first RA-RNTI.

The network device may generate the first RA-RNTI according to the RAPID and/or PUSCH resource information in the first message of the 2-step random access process. And use the first RA-RNTI to scramble the PDCCH in the second message of the 2-step random access process, and/or use the first RA-RNTI to descramble the PUSCH. Therefore, when the network device does not allocate the RNTI to the terminal device, the identification of the terminal device can be realized, and the channel can be added and descrambled to ensure the effective transmission of the channel in the 2-step random access process.

For example, the network device may use the first RA-RNTI to scramble the CRC check bits of the PDCCH in the second message. For example, after encoding the original information of the PDCCH, the network device performs a CRC check on the encoded information through a CRC check code, and uses the first RA-RNTI to scramble the CRC check bits of the PDCCH.

For another example, the network device may use the first RA-RNTI to descramble the encoded information bits on the PUSCH in the first message.

Optionally, when the data channel in the first message sent by the terminal device, such as PUSCH transmission fails, and the network device schedules the terminal device to retransmit the data channel, the first RA-RNTI may be used to scramble to schedule the data The control channel of the channel is, for example, PDCCH.

The PUSCH resources in the first message may include, for example, resources for transmitting the PUSCH and DMRS resources corresponding to the PUSCH. Here, the time-frequency resources of the PUSCH include the time-frequency resources for transmitting the PUSCH Resources and time-frequency resources of the DMRS.

There is a one-to-one correspondence between the current pilot code and the PUSCH resource, or one PUSCH resource corresponds to multiple preamble codes, and the network device may generate the first RA-RNTI according to the RAPID in the first message. However, when one preamble corresponds to multiple PUSCH resources, the network device needs to generate the first RA-RNTI according to the RAPID and PUSCH resource information at the same time, to ensure that the first RA-RNTI corresponding to the terminal device is unique.

The resource index of the PUSCH is, for example, the index of the DMRS corresponding to the PUSCH. The DMRS is used to demodulate the PUSCH.

For example, the RAPID selected by the terminal device corresponds to N PUSCH resources, and the indexes of the N PUSCH resources are index 0, index 1, ..., index N in this order. If the terminal device uses the second PUSCH resource among the N PUSCH resources, the resource index used to calculate the PUSCH used by the first RA-RNTI is index 1.

Optionally, the network device generates the first RA-RNTI according to the RAPID and PUSCH resource information in the first message of the 2-step random access process, including: the network device according to the RAPID and PUSCH in the first message The resource information of PR and the resource information of PRACH used to transmit the preamble, to generate the first RA-RNTI.

Optionally, the PRACH resource information includes at least one of the following information: the position of the OFDM symbol occupied by the PRACH resource in the time domain, the position of the time slot occupied by the PRACH resource in the system frame, and the PRACH resource at The number of resources occupied in the frequency domain, and whether the PRACH resource uses a normal uplink carrier or a single uplink carrier in the frequency domain.

For example, the network device may generate the first RA-RNTI based on the following formula:

For another example, the network device may generate the first RA-RNTI based on the following formula:

The first RA-RNTI=PUSCH_index×RAP_id; or,

The first RA-RNTI=PUSCH_index×RAP_id+RNTI_offset.

It should be understood that, for the method of determining the first RA-RNTI by the network device, reference may be made to the foregoing description about the determination of the first RA-RNTI by the terminal device.

FIG. 6 is a schematic flowchart of a random access method 600 according to an embodiment of the present application. The method described in FIG. 6 may be executed by a terminal device, and the terminal device may be, for example, the terminal device 120 shown in FIG. 1. As shown in FIG. 6, the random access method 600 may include some or all of the following steps. among them:

In 610, the terminal device generates the first RA-RNTI according to the PUSCH resource information in the first message of the 2-step random access process.

Optionally, the method further includes 620.

In 620, the terminal device uses the first RA-RNTI to scramble the PUSCH; and/or, the terminal device uses the first RA-RNTI to descramble the second step of the random access procedure PDCCH in two messages.

Optionally, in 620, the terminal device using the first RA-RNTI to scramble the PUSCH includes: the terminal device generating a scrambling code sequence according to the first RA-RNTI; the terminal device uses The scrambling code sequence scrambles the PUSCH in the first message.

For example, the initial value of the scrambling code sequence is:

c _init =n _RNTI ×2 ¹⁵ +n _ID .

among them,

Is the physical cell identity, and n _{RNTI is} the first RA-RNTI.

The terminal device may generate the first RA-RNTI according to the PUSCH resource information in the first message of the 2-step random access process. And generating a scrambling code sequence based on the first RA-RNTI to scramble the PUSCH in the first message using the scrambling code sequence, and/or descrambling the 2-step random access process based on the first RA-RNTI PDCCH in the second message. Therefore, when the network device does not allocate the RNTI to the terminal device, the identification of the terminal device can be realized, and the channel can be added and descrambled to ensure the effective transmission of the channel in the 2-step random access process.

For example, the terminal device may use the first RA-RNTI to descramble the CRC check bit of the PDCCH in the second message.

Here, the time-frequency resource of the PUSCH in the first message may include, for example, the time-frequency resource for transmitting the PUSCH, and the time-frequency resource of the DMRS corresponding to the PUSCH. The DMRS corresponding to the PUSCH is used to demodulate the PUSCH.

Optionally, the resource information of the PUSCH in the first message includes the resource index of the PUSCH.

In this embodiment, the terminal device generates the first RA-RNTI according to the PUSCH resource index in the first message of the two-step random access process, thereby completing the addition and descrambling of the channel in the two-step random access process, It ensures the effective transmission of the channel in the 2-step random access process.

First RA-RNTI=PUSCH_index; or,

The first RA-RNTI=PUSCH_index+RNTI_offset.

Wherein, PUSCH_index is the resource index of the PUSCH in the first message, for example, the index of the DMRS corresponding to the PUSCH; RNTI_offset is the preset offset value.

Optionally, the resources of the PUSCH in the first message uniquely correspond to the preamble in the first message; or, the resources of the PUSCH in the first message correspond to multiple A preamble, the plurality of preambles includes the preamble in the first message; or, the preamble in the first message corresponds to multiple PUSCH resources, and the multiple PUSCH resources include the first PUSCH resources in a message.

That is to say, there may be a correspondence between the preamble and the resource transmitting PUSCH. Among them, one preamble can correspond to multiple PUSCH resources; one PUSCH resource can correspond to multiple preambles; or, there is a one-to-one correspondence between the preamble and PUSCH resources.

It should be understood that in the embodiment of the present application, the correspondence between the preamble and the PUSCH resource means that the PUSCH resource used by the PUSCH in the first message should be the PUSCH resource corresponding to the preamble in the first message Or, the preamble index in the first message should be the preamble index corresponding to the PUSCH resource used by the PUSCH in the first message.

Wherein, if the resource of the PUSCH in the first message corresponds to multiple preambles, optionally, in 610, the terminal device according to the PUSCH in the first message of the 2-step random access process Resource information to generate the first RA-RNTI, including:

The terminal device generates the first RA according to the resource index of the PUSCH in the first message and the number of the preamble in the plurality of preambles in the first message -RNTI.

The number of the preamble in the first message in the plurality of preambles is the preamble in the preamble group formed by at least one preamble corresponding to the PUSCH resource in the first message Numbering.

For example, assume that the resources of the PUSCH in the first message correspond to M preambles, and the numbers of the M preambles are 0, 1, ..., M in sequence. If the terminal device uses the second preamble in the M preamble resources, the number of the preamble in the first message is 1. In other words, the RAPID of the preamble can be used to modulo M to obtain the number of the preamble in the M preambles.

First RA-RNTI=PUSCH_index×RAP_id_inPUSCH; or,

The first RA-RNTI=PUSCH_index×RAP_id_inPUSCH+RNTI_offset.

Among them, PUSCH_index is the index of the DMRS corresponding to the PUSCH in the first message.

When the resources of the PUSCH in the first message correspond to multiple preambles, the RAP_id_inPUSCH is the number of the preamble in the first message in the multiple preambles.

When the resource of the PUSCH in the first message uniquely corresponds to the preamble in the first message, or the preamble in the first message corresponds to multiple PUSCH resources, RAP_id_inPUSCH Is 1 and the above formula can also be modified to:

First RA-RNTI=PUSCH_inde; or,

The first RA-RNTI=PUSCH_index+RNTI_offset.

7 is a schematic flowchart of a random access method 700 according to an embodiment of the present application. The method described in FIG. 7 may be performed by a network device, and the network device may be, for example, the network device 110 shown in FIG. 1. As shown in FIG. 7, the random access method 700 may include some or all of the following steps. among them:

In 710, the network device generates the first RA-RNTI according to the PUSCH resource information in the first message of the 2-step random access process.

Optionally, the method further includes 720.

In 720, the network device uses the first RA-RNTI to scramble the PDCCH in the second message of the 2-step random access process; and/or, the network device uses the first RA-RNTI to descramble the PUSCH.

For example, the initial value of the scrambling code sequence is:

c _init =n _RNTI ×2 ¹⁵ +n _ID .

among them,

Is the physical cell identity, and n _{RNTI is} the first RA-RNTI.

The network device may generate the first RA-RNTI according to the PUSCH resource information in the first message of the 2-step random access process. And use the first RA-RNTI to scramble the PDCCH in the second message of the 2-step random access process, and/or use the first RA-RNTI to generate a scrambling code sequence to descramble the scrambling code sequence PUSCH. Therefore, when the network device does not allocate the RNTI to the terminal device, the identification of the terminal device can be realized, and the channel can be added and descrambled to ensure the effective transmission of the channel in the 2-step random access process.

In this embodiment, the network device generates the first RA-RNTI according to the PUSCH resource index in the first message of the 2-step random access process, thereby completing the scrambling and descrambling of the channel in the 2-step random access process, It ensures the effective transmission of the channel in the 2-step random access process.

First RA-RNTI=PUSCH_index; or,

The first RA-RNTI=PUSCH_index+RNTI_offset.

Wherein, if the PUSCH resource in the first message corresponds to multiple preambles, optionally, in 710, the network device according to the PUSCH in the first message of the 2-step random access process Resource information to generate the first RA-RNTI, including:

The network device generates the first RA according to the resource index of the PUSCH in the first message and the number of the preamble in the plurality of preambles in the first message -RNTI.

First RA-RNTI=PUSCH_index×RAP_id_inPUSCH; or,

The first RA-RNTI=PUSCH_index×RAP_id_inPUSCH+RNTI_offset.

First RA-RNTI=PUSCH_inde; or,

The first RA-RNTI=PUSCH_index+RNTI_offset.

It should be understood that for the method of determining the first RA-RNTI by the network device in FIG. 7, reference may be made to the foregoing description about the determination of the first RA-RNTI by the terminal device in FIG. 6.

The following describes the two-step random access process of the embodiment of the present application with reference to FIGS. 8 and 9.

FIG. 8 is a schematic diagram of the transmission of the first message in the 2-step random access process.

In 810, the terminal device determines the first RA-RNTI;

In 820, the terminal device uses the first RA-RNTI to scramble the PUSCH in the first message in the 2-step random access process;

In 830, the terminal device sends the first message to the network device;

In 840, the network device receives the first message;

In 850, the network device determines the first RA-RNTI;

In 860, the network device uses the first RA-RNTI to descramble the PUSCH in the first message.

FIG. 9 is a schematic diagram of the transmission of the second message in the 2-step random access process.

In 910, the network device determines the first RA-RNTI;

In 920, the network device uses the first RA-RNTI to scramble the PDCCH in the second message in the 2-step random access process, where the PDCCH is used to schedule the PDSCH in the second message;

In 930, the network device sends the second message to the terminal device;

In 940, the terminal device receives the second message;

In 950, the terminal device determines the first RA-RNTI;

In 960, the terminal device uses the first RA-RNTI to descramble the PUSCH in the second message.

In the embodiment of the present application, both the PUSCH in the first message and the PDCCH in the second message may use the first RA-RNTI for scrambling and scrambling, that is, the same RA-RNTI is used for the first message and the second The channels in the two messages are scrambled and descrambled. The first message and the second message can be transmitted between the terminal device and the network device according to the methods shown in FIGS. 8 and 9.

Alternatively, only the PDCCH in the second message may be scrambled and descrambled using the first RA-RNTI. At this time, the PUSCH in the first message can use the RA-RNTI in the 4-step random access process. Among them, the RA-RNTI in the 4-step random access process is, for example:

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

In addition, the terminal device may determine the first RA-RNTI based on the RAPID and PUSCH resource information, or may obtain the first RA-RNTI from the network device. For example, the network device determines the first RA-RNTI according to the resource information of RAPID and PUSCH, and notifies the terminal device. This embodiment of the present application does not limit this.

The method of the embodiment of the present application may be applied to each random access process rather than just the initial access process. Moreover, the method of the embodiment of the present application can be applied to a contention-based random access procedure (contention-based RACH) and a non-contention-based random access procedure (contention-free RACH).

It should be noted that, without conflict, the embodiments described in this application and/or the technical features in each embodiment can be arbitrarily combined with each other, and the technical solution obtained after the combination should also fall within the scope of protection of this application .

In various embodiments of the present application, the size of the sequence numbers of the above processes does not mean that the execution order is sequential, and the execution order of each process should be determined by its function and inherent logic, and should not correspond to the implementation process of the embodiments of the present application Constitute any limitation.

The communication method according to an embodiment of the present application has been described in detail above, and the device according to the embodiment of the present application will be described below with reference to FIGS. 10 to 17. The technical features described in the method embodiment are applicable to the following device embodiments.

10 is a schematic block diagram of a terminal device 1000 according to an embodiment of the present application. As shown in FIG. 10, the terminal device 1000 includes a processing unit 1010, and the processing unit 1010 is used to:

The first RA-RNTI is generated according to the RAPID and PUSCH resource information in the first message of the 2-step random access process.

Optionally, the processing unit 1010 is further configured to: use the first RA-RNTI to scramble the PUSCH; and/or use the first RA-RNTI to descramble the second step of the 2-step random access process PDCCH in two messages.

Therefore, the terminal device and the network device determine the first RA-RNTI according to the resource information of RAPID and PUSCH, so as to effectively obtain the RA-RNTI in the 2-step random access process. The first RA-RNTI can uniquely identify the terminal device, thereby completing the descrambling of the first message and the second message in the 2-step random access process, further ensuring the effectiveness of the channel in the 2-step random access process transmission.

Optionally, the processing unit 1010 is specifically configured to: generate a scrambling code sequence according to the first RA-RNTI; and use the scrambling code sequence to descramble the PUSCH in the first message.

Optionally, the processing unit 1010 is specifically configured to generate the first RA-RNTI according to the RAPID and PUSCH resource information in the first message and the PRACH resource information used to send the preamble.

Optionally, the PRACH resource information includes at least one of the following information: the position of the OFDM symbol occupied by the PRACH resource in the time domain, the position of the time slot occupied by the PRACH resource in the system frame, and The number of the resource occupied by the PRACH resource in the frequency domain, and whether the PRACH resource uses a normal uplink carrier or a single uplink carrier in the frequency domain.

Optionally, if the RAPID in the first message corresponds to multiple PUSCH resources, the resource index of the PUSCH is the resource number of the PUSCH resource in the multiple PUSCH resources.

Optionally, the resources of the PUSCH include resources for transmitting the PUSCH and resources of the DMRS corresponding to the PUSCH. Here, the time-frequency resources of the PUSCH include the time-frequency resources for transmitting the PUSCH and the Time-frequency resources of DMRS.

It should be understood that the terminal device may perform the corresponding operation performed by the terminal device in the method 400 of the embodiment of the present application.

FIG. 11 is a schematic block diagram of a network device 1100 according to an embodiment of the present application. As shown in FIG. 11, the network device 1100 includes a processing unit 1110, and the processing unit 1110 is configured to:

Optionally, the processing unit 1110 is further configured to: use the first RA-RNTI to scramble the PDCCH in the second message of the 2-step random access process; and/or use the first RA- The RNTI descrambles the PUSCH.

Optionally, the processing unit 1110 is specifically configured to: generate a scrambling code sequence according to the first RA-RNTI; and use the scrambling code sequence to descramble the PUSCH in the first message.

Optionally, the processing unit 1110 is specifically configured to generate the first RA-RNTI according to the resource information of RAPID and PUSCH in the first message and the resource information used to send PRACH.

Optionally, the resources of the PUSCH include resources for transmitting the PUSCH and resources of the demodulation reference signal DMRS corresponding to the PUSCH, where the time-frequency resources of the PUSCH include the time for transmitting the PUSCH Frequency resources and time-frequency resources of the DMRS.

It should be understood that the network device may perform the corresponding operation performed by the network device in the method 500 of the embodiment of the present application.

12 is a schematic block diagram of a terminal device 1200 according to an embodiment of the present application. As shown in FIG. 12, the terminal device 1200 includes a processing unit 1210, and the processing unit 1210 is configured to:

The first RA-RNTI is generated according to the PUSCH resource information in the first message of the 2-step random access process.

Therefore, the terminal device may determine the first RA-RNTI according to the PUSCH resource information, so as to effectively obtain the RA-RNTI in the 2-step random access process. The first RA-RNTI can uniquely identify the terminal device, thereby completing the descrambling of the first message and the second message in the 2-step random access process, further ensuring the effectiveness of the channel in the 2-step random access process transmission.

Optionally, the processing unit 1210 is further configured to: generate a scrambling code sequence according to the first RA-RNTI, and use the scrambling code sequence to scramble the PUSCH in the first message; and/ Or, use the first RA-RNTI to descramble the physical downlink control channel PDCCH in the second message of the 2-step random access process.

Optionally, the resource index of the PUSCH is the index of the DMRS corresponding to the PUSCH.

Optionally, the resources of the PUSCH in the first message uniquely correspond to the preamble in the first message; or, the resources of the PUSCH in the first message correspond to multiple Preamble; or, the preamble in the first message corresponds to multiple PUSCH resources.

Optionally, if the resource of the PUSCH in the first message corresponds to multiple preambles, the processing unit 1210 is specifically configured to: according to the resource index of the PUSCH in the first message, And the number of the preamble in the plurality of preambles in the first message to generate the first RA-RNTI.

Optionally, the time-frequency resources of the PUSCH in the first message include: time-frequency resources for transmitting the PUSCH, and time-frequency resources of the DMRS corresponding to the PUSCH.

It should be understood that the terminal device may perform the corresponding operation performed by the terminal device in the method 600 of the embodiment of the present application.

FIG. 13 is a schematic block diagram of a network device 1300 according to an embodiment of the present application. As shown in FIG. 13, the network device 1300 includes a processing unit 1310, and the processing unit 1310 is configured to:

Therefore, the network device determines the first RA-RNTI according to the resource information of RAPID and PUSCH, so as to effectively obtain the RA-RNTI in the 2-step random access process. The first RA-RNTI can uniquely identify the terminal device, thereby completing the descrambling of the first message and the second message in the 2-step random access process, further ensuring the effectiveness of the channel in the 2-step random access process transmission.

Optionally, the processing unit 1310 is further configured to: use the first RA-RNTI to scramble the physical downlink control channel PDCCH in the second message of the 2-step random access process; and/or, according to The first RA-RNTI generates a scrambling code sequence, and uses the scrambling code sequence to descramble the PUSCH in the first message.

Optionally, if the resource of the PUSCH in the first message corresponds to multiple preambles, the processing unit 1310 is specifically configured to: according to the resource index of the PUSCH in the first message, And the number of the preamble in the plurality of preambles in the first message to generate the first RA-RNTI.

It should be understood that the network device may perform the corresponding operation performed by the network device in the method 700 of the embodiment of the present application.

FIG. 14 is a schematic structural diagram of a communication device 1400 provided by an embodiment of the present application. The communication device 1400 shown in FIG. 14 includes a processor 1410. The processor 1410 can call and run a computer program from the memory to implement the method in the embodiments of the present application.

Optionally, as shown in FIG. 14, the communication device 1400 may further include a memory 1420. The processor 1410 can call and run a computer program from the memory 1420 to implement the method in the embodiments of the present application.

The memory 1420 may be a separate device independent of the processor 1410, or may be integrated in the processor 1410.

Optionally, as shown in FIG. 14, the communication device 1400 may further include a transceiver 1430, and the processor 1410 may control the transceiver 1430 to communicate with other devices, specifically, may send information or data to other devices, or receive other Information or data sent by the device.

Among them, the transceiver 1430 may include a transmitter and a receiver. The transceiver 1430 may further include antennas, and the number of antennas may be one or more.

Optionally, the communication device 1400 may specifically be the terminal device of the embodiment of the present application, and the communication device 1400 may implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application. .

Optionally, the communication device 1400 may specifically be a network device according to an embodiment of the present application, and the communication device 1400 may implement the corresponding process implemented by the network device in each method of the embodiment of the present application. .

15 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 1500 shown in FIG. 15 includes a processor 1510, and the processor 1510 can call and run a computer program from the memory to implement the method in the embodiments of the present application.

Optionally, as shown in FIG. 15, the chip 1500 may further include a memory 1520. The processor 1510 can call and run a computer program from the memory 1520 to implement the method in the embodiments of the present application.

The memory 1520 may be a separate device independent of the processor 1510, or may be integrated in the processor 1510.

Optionally, the chip 1500 may further include an input interface 1530. The processor 1510 can control the input interface 1530 to communicate with other devices or chips. Specifically, it can obtain information or data sent by other devices or chips.

Optionally, the chip 1500 may further include an output interface 1540. The processor 1510 can control the output interface 1540 to communicate with other devices or chips. Specifically, it can output information or data to other devices or chips.

Optionally, the chip can be applied to the terminal device in the embodiments of the present application, and the chip can implement the corresponding process implemented by the terminal device in each method of the embodiments of the present application.

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the network device in each method of the embodiment of the present application.

The chip described in the embodiments of the present application may also be referred to as a system-level chip, a system chip, a chip system, or a system-on-chip chip.

The processor in the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The aforementioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an existing programmable gate array (Field Programmable Gate Array, FPGA), or other available Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware decoding processor, or may be executed and completed by a combination of hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, and registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

The memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory may be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically Erasable programmable read only memory (Electrically, EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (Direct Rambus RAM, DR RAM).

The above memory is exemplary but not limiting. For example, the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous Dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data) SDRAM (DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic Random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is to say, the memories in the embodiments of the present application are intended to include but are not limited to these and any other suitable types of memories.

16 is a schematic block diagram of a communication system 1600 according to an embodiment of the present application. As shown in FIG. 16, the communication system 1600 includes a terminal device 1610 and a network device 1620.

Wherein, the terminal device 1610 is configured to: generate a first RA-RNTI according to the RAPID and PUSCH resource information in the first message of the 2-step random access process; use the first RA-RNTI to scramble the PUSCH, and/or, use the first RA-RNTI to descramble the PDCCH in the second message of the 2-step random access process.

The network device 1620 is configured to: generate a first RA-RNTI according to the RAPID and PUSCH resource information in the first message of the 2-step random access process; use the first RA-RNTI to scramble the 2 steps The PDCCH in the second message of the random access process, and/or, descrambles the PUSCH using the first RA-RNTI.

The terminal device 1610 may be used to implement the corresponding functions implemented by the terminal device in the method 400 of the embodiment of the present application, and the composition of the terminal device 1610 may be as shown in the terminal device 1000 in FIG. This will not be repeated here.

The network device 1620 may be used to implement the corresponding functions implemented by the network device in the method 500 of the embodiment of the present application, and the composition of the network device 1620 may be as shown in the network device 1100 in FIG. This will not be repeated here.

17 is a schematic block diagram of a communication system 1700 according to an embodiment of the present application. As shown in FIG. 17, the communication system 1700 includes a terminal device 1710 and a network device 1720.

Wherein, the terminal device 1710 is configured to: generate a first RA-RNTI according to the PUSCH resource information in the first message of the 2-step random access process; generate and use a scrambling code sequence according to the first RA-RNTI The scrambling code sequence scrambles the PUSCH in the first message, and/or, uses the first RA-RNTI to descramble the physical downlink in the second message of the 2-step random access process Control channel PDCCH.

The network device 1720 is configured to: generate a first RA-RNTI according to the PUSCH resource information in the first message of the 2-step random access process; use the first RA-RNTI to scramble the 2-step random access The PDCCH in the second message of the incoming process, and/or, generates a scrambling code sequence according to the first RA-RNTI, and uses the scrambling code sequence to descramble the PUSCH in the first message.

The terminal device 1710 may be used to implement the corresponding functions implemented by the terminal device in the method 600 of the embodiment of the present application, and the composition of the terminal device 1710 may be as shown in the terminal device 1200 in FIG. 12. This will not be repeated here.

The network device 1720 may be used to implement the corresponding functions implemented by the network device in the method 700 of the embodiment of the present application, and the composition of the network device 1720 may be as shown in the network device 1300 in FIG. 13, for simplicity, in This will not be repeated here.

Embodiments of the present application also provide a computer-readable storage medium for storing computer programs. Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method of the embodiments of the present application. Repeat. Optionally, the computer-readable storage medium can be applied to the terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding process implemented by the terminal device in each method of the embodiments of the present application. Repeat.

An embodiment of the present application also provides a computer program product, including computer program instructions. Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. Repeat again. Optionally, the computer program product can be applied to the terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. Repeat again.

An embodiment of the present application also provides a computer program. Optionally, the computer program can be applied to the network device in the embodiment of the present application. When the computer program runs on the computer, the computer is allowed to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. And will not be repeated here. Optionally, the computer program can be applied to the terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer is allowed to execute the corresponding process implemented by the terminal device in each method of the embodiments of the present application. And will not be repeated here.

The terms "system" and "network" in the embodiments of the present invention are often used interchangeably herein. The term "and/or" in this article is just an association relationship that describes an associated object, which means that there can be three kinds of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, exist alone B these three cases. In addition, the character "/" in this article generally indicates that the related objects before and after are in an "or" relationship.

In the embodiment of the present invention, "B corresponding to (corresponding to) A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B based on A does not mean determining B based on A alone, and B may also be determined based on A and/or other information.

Those of ordinary skill in the art may realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application of the technical solution and design constraints. Professional technicians 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.

Those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or may Integration into another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical, or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above is only the specific implementation of this application, but the scope of protection of this application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in this application. It should be covered by the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A random access method, characterized in that the method includes:

The terminal device generates the first random access wireless network temporary identifier RA-RNTI according to the random access preamble index RAPID and the physical uplink shared channel PUSCH resource information in the first message of the 2-step random access process.
The method according to claim 1, wherein the method further comprises:

The terminal device uses the first RA-RNTI to scramble the PUSCH; and/or,

The terminal device uses the first RA-RNTI to descramble the physical downlink control channel PDCCH in the second message of the 2-step random access process.
The method according to claim 2, wherein the terminal device scrambling the PUSCH using the first RA-RNTI includes:

The terminal device generates a scrambling code sequence according to the first RA-RNTI;

The terminal device uses the scrambling code sequence to scramble the PUSCH in the first message.
The method according to any one of claims 1 to 3, wherein the terminal device generates the first RA-RNTI according to the RAPID and PUSCH resource information in the first message of the 2-step random access process ,include:

The terminal device generates the first RA-RNTI according to the resource information of the RAPID and PUSCH in the first message and the resource information of the physical random access channel PRACH used to send the preamble.
The method of claim 4, wherein the PRACH resource information includes at least one of the following information:

The position of the orthogonal frequency division multiplexing OFDM symbol occupied by the PRACH resource in the time domain, the position of the time slot occupied by the PRACH resource in the system frame, the number of the resource occupied by the PRACH resource in the frequency domain, And whether the PRACH resource uses a normal uplink carrier or a single uplink carrier in the frequency domain.
The method according to any one of claims 1 to 5, wherein the resource information of the PUSCH includes a resource index of the PUSCH.
The method according to claim 6, wherein the resource index of the PUSCH is an index of the DMRS corresponding to the PUSCH.
The method according to claim 6, wherein if the RAPID in the first message corresponds to multiple PUSCH resources, the resource index of the PUSCH is that the PUSCH resource is in the multiple PUSCH resources The resource number in.
The method according to any one of claims 1 to 8, wherein the resources of the PUSCH include resources for transmitting the PUSCH and resources of a demodulation reference signal DMRS corresponding to the PUSCH.
A random access method, characterized in that the method includes:

The network device generates the first random access wireless network temporary identifier RA-RNTI according to the random access preamble index RAPID and the physical uplink shared channel PUSCH resource information in the first message of the 2-step random access process.
The method of claim 10, further comprising:

The network device uses the first RA-RNTI to scramble the physical downlink control channel PDCCH in the second message of the 2-step random access process; and/or,

The network device uses the first RA-RNTI to descramble the PUSCH.
The method according to claim 11, wherein the network device descrambling the PUSCH using the first RA-RNTI includes:

The network device generates a scrambling code sequence according to the first RA-RNTI;

The network device uses the scrambling code sequence to descramble the PUSCH in the first message.
The method according to any one of claims 10 to 12, wherein the network device generates the first RA-RNTI according to the RAPID and PUSCH resource information in the first message of the 2-step random access process ,include:

The network device generates the first RA-RNTI according to the resource information of the RAPID and PUSCH in the first message and the resource information of the physical random access channel PRACH used to send the preamble.
The method according to claim 13, wherein the PRACH resource information includes at least one of the following information:

The position of the orthogonal frequency division multiplexing OFDM symbol occupied by the PRACH resource in the time domain, the position of the time slot occupied by the PRACH resource in the system frame, the number of the resource occupied by the PRACH resource in the frequency domain, And whether the PRACH resource uses a normal uplink carrier or a single uplink carrier in the frequency domain.
The method according to any one of claims 10 to 14, wherein the resource information of the PUSCH includes the resource index of the PUSCH.
The method according to claim 15, wherein the resource index of the PUSCH is an index of the DMRS corresponding to the PUSCH.
The method according to claim 15, wherein if the RAPID in the first message corresponds to multiple PUSCH resources, the PUSCH resource index is that the PUSCH resource is in the multiple PUSCH resources The resource number in.
The method according to any one of claims 10 to 17, wherein the resources of the PUSCH include resources for transmitting the PUSCH and resources of a demodulation reference signal DMRS corresponding to the PUSCH.
A random access method, characterized in that the method includes:

The terminal device generates the first random access wireless network temporary identifier RA-RNTI according to the physical uplink shared channel PUSCH resource information in the first message of the 2-step random access process.
The method of claim 19, further comprising:

The terminal device generates a scrambling code sequence according to the first RA-RNTI, and uses the scrambling code sequence to scramble the PUSCH in the first message; and/or,

The terminal device uses the first RA-RNTI to descramble the physical downlink control channel PDCCH in the second message of the 2-step random access process.
The method according to claim 19 or 20, wherein the resource information of the PUSCH in the first message includes the resource index of the PUSCH.
The method according to claim 21, wherein the resource index of the PUSCH in the first message is the index of the DMRS corresponding to the PUSCH.
The method according to any one of claims 19 to 22, characterized in that

The PUSCH resource in the first message uniquely corresponds to the preamble in the first message; or,

The resources of the PUSCH in the first message correspond to multiple preambles; or,

The preamble in the first message corresponds to multiple PUSCH resources.
The method according to claim 23, wherein if the PUSCH resource in the first message corresponds to multiple preambles, the terminal device according to the first message of the 2-step random access process The resource information of the PUSCH in the first RA-RNTI is generated, including:

The terminal device generates the first RA according to the resource index of the PUSCH in the first message and the number of the preamble in the plurality of preambles in the first message -RNTI.
The method according to any one of claims 19 to 24, wherein the time-frequency resource of the PUSCH in the first message includes: a time-frequency resource for transmitting the PUSCH, and The time-frequency resources of the demodulation reference signal DMRS corresponding to PUSCH are described.
A random access method, characterized in that the method includes:

The network device generates the first random access wireless network temporary identifier RA-RNTI according to the physical uplink shared channel PUSCH resource information in the first message of the 2-step random access process.
The method of claim 26, further comprising:

The network device uses the first RA-RNTI to scramble the physical downlink control channel PDCCH in the second message of the 2-step random access process; and/or,

The network device generates a scrambling code sequence according to the first RA-RNTI, and uses the scrambling code sequence to descramble the PUSCH in the first message.
The method according to claim 26 or 27, wherein the resource information of the PUSCH in the first message includes the resource index of the PUSCH.
The method according to claim 28, wherein the resource index of the PUSCH in the first message is the index of the DMRS corresponding to the PUSCH.
The method according to any one of claims 26 to 29, characterized in that

The PUSCH resource in the first message uniquely corresponds to the preamble in the first message; or,

The resources of the PUSCH in the first message correspond to multiple preambles; or,

The preamble in the first message corresponds to multiple PUSCH resources.
The method according to claim 30, wherein if the PUSCH resource in the first message corresponds to multiple preambles, the network device uses the first message of the 2-step random access process The resource information of the PUSCH in the first RA-RNTI is generated, including:

The network device generates the first RA according to the resource index of the PUSCH in the first message and the number of the preamble in the plurality of preambles in the first message -RNTI.
The method according to any one of claims 26 to 31, wherein the time-frequency resource of the PUSCH in the first message includes: a time-frequency resource for transmitting the PUSCH, and The time-frequency resource of the demodulation reference signal DMRS corresponding to PUSCH is described.
A terminal device, characterized in that the terminal device includes a processing unit, and the processing unit is used for:

The first random access wireless network temporary identifier RA-RNTI is generated according to the random access preamble index RAPID and/or the physical uplink shared channel PUSCH resource information in the first message of the 2-step random access process.
The terminal device according to claim 33, wherein the processing unit is further configured to:

Scramble the PUSCH using the first RA-RNTI; and/or,

Using the first RA-RNTI to descramble the physical downlink control channel PDCCH in the second message of the 2-step random access process.
The terminal device according to claim 34, wherein the processing unit is specifically configured to:

Generating a scrambling code sequence according to the first RA-RNTI;

Use the scrambling code sequence to scramble the PUSCH in the first message.
The terminal device according to any one of claims 33 to 35, wherein the processing unit is specifically configured to:

The first RA-RNTI is generated according to the resource information of RAPID and PUSCH in the first message and the resource information of the physical random access channel PRACH used to send the preamble.
The terminal device according to claim 36, wherein the PRACH resource information includes at least one of the following information:

The position of the orthogonal frequency division multiplexing OFDM symbol occupied by the PRACH resource in the time domain, the position of the time slot occupied by the PRACH resource in the system frame, the number of the resource occupied by the PRACH resource in the frequency domain, And whether the PRACH resource uses a normal uplink carrier or a single uplink carrier in the frequency domain.
The terminal device according to any one of claims 33 to 37, wherein the resource information of the PUSCH includes the resource index of the PUSCH.
The terminal device according to claim 38, wherein the resource index of the PUSCH is an index of a DMRS corresponding to the PUSCH.
The terminal device according to claim 38, wherein if the RAPID in the first message corresponds to multiple PUSCH resources, the resource index of the PUSCH is that the PUSCH resource is in the multiple PUSCH The resource number in the resource.
The terminal device according to any one of claims 33 to 40, wherein the resources of the PUSCH include resources for transmitting the PUSCH and resources of a demodulation reference signal DMRS corresponding to the PUSCH.
A network device, characterized in that the network device includes a processing unit, and the processing unit is configured to:

The first random access wireless network temporary identifier RA-RNTI is generated according to the random access preamble index RAPID and the physical uplink shared channel PUSCH resource information in the first message of the 2-step random access process.
The network device according to claim 42, wherein the processing unit is further configured to:

Using the first RA-RNTI to scramble the physical downlink control channel PDCCH in the second message of the 2-step random access process; and/or,

The first RA-RNTI is used to descramble the PUSCH.
The network device according to claim 43, wherein the processing unit is specifically configured to:

Generating a scrambling code sequence according to the first RA-RNTI;

Using the scrambling code sequence, descramble the PUSCH in the first message.
The network device according to any one of claims 42 to 44, wherein the processing unit is specifically configured to:

The first RA-RNTI is generated according to the resource information of RAPID and PUSCH in the first message and the resource information of the physical random access channel PRACH used to send the preamble.
The network device according to claim 45, wherein the PRACH resource information includes at least one of the following information:

The position of the orthogonal frequency division multiplexing OFDM symbol occupied by the PRACH resource in the time domain, the position of the time slot occupied by the PRACH resource in the system frame, the number of the resource occupied by the PRACH resource in the frequency domain, And whether the PRACH resource uses a normal uplink carrier or a single uplink carrier in the frequency domain.
The network device according to any one of claims 42 to 46, wherein the resource information of the PUSCH includes the resource index of the PUSCH.
The network device according to claim 47, wherein the resource index of the PUSCH is an index of a DMRS corresponding to the PUSCH.
The network device according to claim 47, wherein if the RAPID in the first message corresponds to multiple PUSCH resources, the resource index of the PUSCH is that the PUSCH resource is in the multiple PUSCH The resource number in the resource.
The network device according to any one of claims 42 to 49, wherein the resources of the PUSCH include resources for transmitting the PUSCH and resources of a demodulation reference signal DMRS corresponding to the PUSCH.
A terminal device, characterized in that the terminal device includes a processing unit, and the processing unit is used for:

The first random access wireless network temporary identifier RA-RNTI is generated according to the physical uplink shared channel PUSCH resource information in the first message of the 2-step random access process.
The terminal device according to claim 51, wherein the processing unit is further configured to:

Generate a scrambling code sequence according to the first RA-RNTI, and use the scrambling code sequence to scramble the PUSCH in the first message; and/or,

Using the first RA-RNTI to descramble the physical downlink control channel PDCCH in the second message of the 2-step random access process.
The terminal device according to claim 51 or 52, wherein the resource information of the PUSCH in the first message includes the resource index of the PUSCH.
The terminal device according to claim 53, wherein the resource index of the PUSCH in the first message is the index of the DMRS corresponding to the PUSCH.
The terminal device according to any one of claims 51 to 54, wherein

The PUSCH resource in the first message uniquely corresponds to the preamble in the first message; or,

The resources of the PUSCH in the first message correspond to multiple preambles; or,

The preamble in the first message corresponds to multiple PUSCH resources.
The terminal device according to claim 55, wherein if the PUSCH resource in the first message corresponds to multiple preambles, the processing unit is specifically configured to:

The first RA-RNTI is generated according to the resource index of the PUSCH in the first message and the number of the preamble in the plurality of preambles in the first message.
The terminal device according to any one of claims 51 to 56, wherein the time-frequency resources of the PUSCH in the first message include: time-frequency resources for transmitting the PUSCH, and Time-frequency resources of the demodulation reference signal DMRS corresponding to the PUSCH.
A network device, characterized in that the network device includes a processing unit, and the processing unit is configured to:

The first random access wireless network temporary identifier RA-RNTI is generated according to the physical uplink shared channel PUSCH resource information in the first message of the 2-step random access process.
The network device according to claim 58, wherein the processing unit is further configured to:

Using the first RA-RNTI to scramble the physical downlink control channel PDCCH in the second message of the 2-step random access process; and/or,

Generate a scrambling code sequence according to the first RA-RNTI, and use the scrambling code sequence to descramble the PUSCH in the first message.
The network device according to claim 58 or 59, wherein the resource information of the PUSCH in the first message includes the resource index of the PUSCH.
The network device according to claim 60, wherein the resource index of the PUSCH in the first message is the index of the DMRS corresponding to the PUSCH.
The network device according to any one of claims 58 to 61, characterized in that

The PUSCH resource in the first message uniquely corresponds to the preamble in the first message; or,

The resources of the PUSCH in the first message correspond to multiple preambles; or,

The preamble in the first message corresponds to multiple PUSCH resources.
The network device according to claim 62, wherein if the PUSCH resource in the first message corresponds to multiple preambles, the processing unit is specifically configured to:

The first RA-RNTI is generated according to the resource index of the PUSCH in the first message and the number of the preamble in the plurality of preambles in the first message.
The network device according to any one of claims 58 to 63, wherein the time-frequency resource of the PUSCH in the first message includes: a time-frequency resource for transmitting the PUSCH, and Time-frequency resources of the demodulation reference signal DMRS corresponding to the PUSCH.
A terminal device, characterized in that the terminal device includes a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute claim 1 The method according to any one of claims 9 to 9, or the method according to any one of claims 19 to 25.
A network device, characterized in that the network device includes a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute claim 10 A method according to any one of 18 to 18, or a method according to any one of claims 26 to 32.
A chip, characterized in that the chip includes a processor, and the processor is used to call and run a computer program from a memory so that the device on which the chip is installed executes any one of claims 1 to 9. A method, or the method according to any one of claims 19 to 25.
A chip, characterized in that the chip includes a processor, and the processor is used to call and run a computer program from a memory so that a device on which the chip is installed executes any one of claims 10 to 18. The method, or the method according to any one of claims 26 to 32.
A computer-readable storage medium, characterized in that it is used to store a computer program that causes a computer to execute the method according to any one of claims 1 to 9, or execute any one of claims 19 to 25 The method.
A computer-readable storage medium, characterized in that it is used to store a computer program that causes a computer to perform the method according to any one of claims 10 to 18 or any one of claims 26 to 32 The method.
A computer program product, characterized in that it includes computer program instructions that cause a computer to perform the method according to any one of claims 1 to 9, or perform any one of claims 19 to 25 Methods.
A computer program product, characterized in that it includes computer program instructions that cause a computer to perform the method according to any one of claims 10 to 18, or perform any one of claims 26 to 32 Methods.
A computer program, characterized in that the computer program causes a computer to execute the method according to any one of claims 1 to 9, or execute the method according to any one of claims 19 to 25.
A computer program, characterized in that the computer program causes a computer to execute the method according to any one of claims 10 to 18 or the method according to any one of claims 26 to 32.
A communication system, characterized by comprising the terminal device according to any one of claims 33 to 41, and the network device according to any one of claims 42 to 50.
A communication system, characterized by comprising the terminal device according to any one of claims 51 to 57, and the network device according to any one of claims 58 to 64.