WO2020172777A1

WO2020172777A1 - Random access method and apparatus

Info

Publication number: WO2020172777A1
Application number: PCT/CN2019/076089
Authority: WO
Inventors: 徐伟杰; 吴作敏; 贺传峰
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-02-25
Filing date: 2019-02-25
Publication date: 2020-09-03
Also published as: CN111972032A; CN111972032B

Abstract

Provided are a random access method and apparatus capable of realizing effective transmission of a first message in a two-step random access procedure. The method comprises: a terminal apparatus transmitting a first message in a two-step random access procedure, the first message comprising a physical uplink shared channel (PUSCH) and a preamble, and the PUSCH being transmitted before transmission of the preamble.

Description

Random access method and equipment

Technical field

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

Background technique

The 5G system or New Radio (NR) system allows the use of 2-step random access (2-step RA). In 2-step random access, message 1 (Msg1) and message 3 (Msg 3) in 4-step random access (4-step RA) can be sent as the first message in 2-step random access. And send Msg 2 and Msg 4 in the 4-step random access process as the second message in the 2-step random access. The transmission of the first message has a great impact on the 2-step random access process. Therefore, how to realize the effective transmission of the first message becomes an urgent problem to be solved.

Summary of the invention

This application provides a method and equipment for random access, which can realize effective transmission of the first message in 2-step random access.

In a first aspect, a random access method is provided, including: a terminal device sends a first message in 2-step random access, the first message includes a PUSCH and a preamble, and the PUSCH is in the preamble. Sent before the code.

In a second aspect, a random access method is provided, including: a terminal device selects a target resource type from a first type of resource and a second type of resource; the terminal device uses the target resource type to send a 2-step random access The first message entered.

Wherein, the first type resource includes a first PUSCH resource and a first PRACH resource located after the first PUSCH resource, and the second type resource includes a second PRACH resource and a first PRACH resource located after the second PRACH resource. Two PUSCH resources, the first PUSCH resource and the second PUSCH resource are used to transmit the PUSCH in the first message, and the first PRACH resource and the second PRACH resource are used to transmit the first The preamble in the message.

In a third aspect, a random access method is provided, which includes: configuring a first-type resource by a network device. Wherein, the first type resource includes a first PUSCH resource and a first PRACH resource located after the first PUSCH resource, the first PUSCH resource is used to transmit the PUSCH in the first message, and the first PUSCH resource A PRACH resource is used to transmit the preamble in the first message.

In a fourth aspect, a terminal device is provided, which can execute the foregoing first aspect or any optional implementation method of the first aspect. Specifically, the terminal device may include a functional module for executing the foregoing first aspect or any possible implementation manner of the first aspect.

In a fifth aspect, a terminal device is provided, and the terminal device can execute the foregoing second aspect or any optional implementation method of the second aspect. Specifically, the terminal device may include a functional module for executing the foregoing second aspect or any possible implementation of the second aspect.

In a sixth aspect, a network device is provided, and the network device can execute the foregoing third aspect or any optional implementation method of the third aspect. Specifically, the network device may include a functional module for executing the foregoing third aspect or any possible implementation of the third aspect.

In a seventh 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 above-mentioned first aspect or the method in any possible implementation of the first aspect.

In an eighth 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 above-mentioned second aspect or the method in any possible implementation of the second aspect.

In a ninth 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 third aspect or the method in any possible implementation manner of the third aspect.

In a tenth aspect, a chip is provided for implementing the foregoing first aspect or any possible implementation of the first aspect. Specifically, the chip includes a processor, configured to call and run 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 of the first aspect.

In an eleventh aspect, a chip is provided for implementing the foregoing second aspect or any possible implementation method of the second aspect. Specifically, the chip includes a processor, configured to call and run 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 twelfth aspect, a chip is provided for implementing the foregoing third aspect or any possible implementation method of the third aspect. Specifically, the chip includes a processor, configured to call and run 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 of the third aspect.

In a thirteenth aspect, a computer-readable storage medium is provided for storing a computer program that enables a computer to execute the above-mentioned first aspect or the method in any possible implementation of the first aspect.

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

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

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

In a seventeenth aspect, a computer program product is provided, including computer program instructions, which cause a computer to execute the foregoing second aspect or any possible implementation of the second aspect.

In an eighteenth aspect, a computer program product is provided, including computer program instructions that cause a computer to execute the foregoing third aspect or any possible implementation of the third aspect.

In a nineteenth aspect, a computer program is provided, which when running on a computer, causes the computer to execute the method in the first aspect or any possible implementation of the first aspect.

In a twentieth aspect, a computer program is provided, which when running on a computer, causes the computer to execute the above-mentioned second aspect or the method in any possible implementation of the second aspect.

In a twenty-first aspect, a computer program is provided, which when running on a computer, causes the computer to execute the foregoing third aspect or any possible implementation of the third aspect.

In a twenty-second aspect, a communication system is provided, including terminal equipment and network equipment.

The network device is used to configure the first type of resources;

The terminal device is configured to: use the first-type resource to send the first message in 2-step random access;

Wherein, the first type resource includes a first PUSCH resource and a first PRACH resource located after the first PUSCH resource, the first PUSCH resource is used to send the PUSCH in the first message, and the first PUSCH resource is A PRACH resource is used to send the preamble in the first message.

In a twenty-third aspect, a communication system is provided, including terminal equipment and network equipment.

The network device is used to configure the first type of resource and the second type of resource;

The terminal device is configured to: select a target resource type from the first type of resource and the second type of resource, and use the target resource type to send the first message in 2-step random access;

Based on the above technical solution, the first type of resource used to transmit the first message in the 2-step random access process is configured, where the first type of resource includes the first PUSCH resource and the first PRACH located after the first PUSCH resource Therefore, the terminal device can send the PUSCH and the preamble in the first message on the first PUSCH resource and the first PRACH resource in sequence, thereby realizing effective transmission of the first message. Further, when the first type of resource and the second type of resource are configured at the same time, the second type of resource includes a second PRACH resource and a second PUSCH resource located after the second PRACH resource, and the terminal device can be in the two types of resources Choose a suitable type of resource to transmit the first message. Even if one type of resource is currently missed, another type of resource can be used to continue to transmit the first message without waiting for the next resource cycle, which greatly reduces the first message. The delay of the message.

Description of the drawings

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

Figure 2 is a schematic flow chart of the 4-step random access.

Figure 3 is a schematic flow chart of 2-step random access

Figure 4 is a schematic diagram of a second type of resource in an embodiment of the present application.

Fig. 5 is a flow interaction diagram of a random access method according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a first type of resource in an embodiment of the present application.

Fig. 7 is a flow interaction diagram of a random access method according to an embodiment of the present application.

Figures 8(a) and 8(b) are schematic diagrams of resources of the first type of resources located before the second type of resources in an embodiment of the present application.

Fig. 9(a) is a schematic diagram of overlapping of the first PRACH resource and the second PRACH resource in an embodiment of the present application.

FIG. 9(b) is a schematic diagram of overlapping preamble resources in the first PRACH resource and the second PRACH resource in an embodiment of the present application.

Figures 10(a) and 10(b) are schematic diagrams of resources of the first type of resources located behind the second type of resources in an embodiment of the present application.

FIG. 11 is a schematic diagram of overlapping of the first PUSCH resource and the second PUSCH resource in an embodiment of the present application.

FIG. 12 is a schematic diagram of a terminal device in an embodiment of the present application selecting a first-type resource or a second-type resource.

FIG. 13 is a schematic diagram of a first transmission window and a second transmission window in an embodiment of the present application.

FIG. 14 is a schematic block diagram of a terminal device according to an embodiment of the present application.

FIG. 15 is a schematic block diagram of a terminal device according to an embodiment of the present application.

FIG. 16 is a schematic block diagram of a network device according to an embodiment of the present application.

FIG. 17 is a schematic structural diagram of a communication device according to an embodiment of the present application.

FIG. 18 is a schematic structural diagram of a chip of an embodiment of the present application.

FIG. 19 is a schematic block diagram of a communication system according to an embodiment of the present application.

FIG. 20 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.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, and Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, 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 frequency bands (LTE-based access to unlicensed spectrum, LTE-U) system, NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed frequency bands, Universal Mobile Telecommunication System (UMTS), global Worldwide Interoperability for Microwave Access (WiMAX) communication systems, Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems 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 technology, 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 (Machine to Machine, M2M) communication, machine type communication (MTC), and vehicle to vehicle (V2V) communication, etc. The embodiments of this application can also be applied to these communications system.

Optionally, the communication system in the embodiments of the present application can be applied to 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 terminal devices. The network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in 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 or Entry points, in-vehicle devices, wearable devices, network-side devices in next-generation networks, or network devices in the future evolution of the Public Land Mobile Network (PLMN), etc.

The wireless communication system 100 also includes at least one terminal device 120 located within the coverage area 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 (UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication Equipment, user agent or user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or terminal devices in the future evolved PLMN, etc. Wherein, optionally, direct terminal (D2D) communication may also be performed between the terminal devices 120.

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

Figure 1 exemplarily shows one network device and two terminal devices. Optionally, the wireless communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The application embodiment does not limit this. In addition, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment 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 equipment can only perform uplink transmission 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 of user uplink synchronization loss. For ease of understanding, the random access process will be briefly introduced below in conjunction with FIG. 2 and FIG. 3.

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

(1) Initial access (initial access).

The terminal device will enter the RRC connected state (RRC_CONNECTED) from the radio resource control (Radio Resource Control, RRC) idle state (RRC_IDLE state).

(2) Handover.

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

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

The terminal device 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 an "unsynchronized" state.

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

(5) In the RRC connection state, when the uplink data arrives, the uplink is in an "unsynchronized" state or there is no available physical uplink control channel (PUCCH) resource for scheduling request (SR) transmission.

When uplink data arrives, for example, when it needs to report a measurement report or send data, if the uplink is in the "out of synchronization" state, the terminal device can initiate a random access process; or if the terminal device that is already in the uplink synchronization state is allowed to use the random access channel (Random Access Channel (RACH) replaces the role of SR, so when the uplink is in the "out of synchronization" state, the terminal device can initiate a random access process.

(6) In the RRC connection state, for positioning, a timing advance (Timing Advance, TA) is required.

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

Figure 2 is a flow chart of 4-step random access. As shown in Figure 2, the 4-step random access process can include the following four steps:

Step 1. The terminal device sends Msg 1.

The terminal device sends an Msg 1 to the network device to tell the network device that the terminal device initiated a random access request. The Msg 1 carries a random access preamble (Random Access Preamble, RAP), or it is called a preamble or random access. Preamble sequence, preamble sequence, etc. At the same time, Msg 1 can also be used for network equipment to estimate the transmission delay between it and the terminal equipment and to calibrate the uplink time accordingly.

Step 2. The network device sends Msg 2.

After receiving the Msg 1 sent by the terminal device, the network device sends Msg 2, that is, a random access response (Random Access Response, RAR) message to the terminal device. The Msg 2 can be scrambled through a random access radio network temporary identity (Random Access Radio Network Temporary Identity, RA-RNTI). The terminal device can monitor the Physical Downlink Control Channel (PDCCH) in the RAR window to receive the RAR message scrambled with the RA-RNTI, regardless of the measurement gap that may occur .

If the terminal device does not receive the RAR message replies from the network device within the RAR window, it is considered that this random access has failed. If the terminal device successfully detects the RAR message in the RAR window and the index of the preamble carried in the RAR message is the same as the index of the preamble in Msg 1, the terminal device can stop detecting the RAR message. The terminal device can use RA-RNTI to descramble the RAR message.

Wherein, the RAR message may include response messages for multiple terminal devices that send the preamble. Among them, the response message for each terminal device includes the random access preamble index (Random Access Preamble Identify, RAPID), Msg 3 resource allocation information, and time advance (Time Advance, TA) adjustment information used by the terminal device. , And Temporary Cell-Radio Network Temporary Identity (TC-RNTI), etc.

In the NR standard, the RAR message can be scheduled in a downlink control information (Download Control Information, DCI) format (DCI format) 1-0, and the PDCCH for scheduling the RAR message can be scrambled using the aforementioned RA-RNTI.

Step 3. The terminal device sends Msg 3.

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 index to check, and after determining that it is its own RAR message, it generates Msg 3 at the RRC layer and sends it to The network device sends Msg 3, which 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 of the 4-step random access process may include different content.

For example, for the initial access scenario, Msg 3 includes the RRC Connection Request message (RRC Connection Request) generated by the RRC layer, which at least carries the non-access stratum (Non-Access Stratum, NAS) identification information of the terminal device. In addition, Msg 3 may also carry, for example, the 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, Msg 3 includes the 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, Msg 3 may also carry, for example, a Cell Radio Network Temporary Identifier (C-RNTI) and protocol control information (Protocol Control Information, PCI).

For another example, for a handover scenario, Msg 3 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, Msg 3 may also carry information such as Buffer Status Report (BSR). For other trigger events such as uplink/downlink data arrival scenarios, Msg 3 at least needs to include the C-RNTI of the terminal device.

It should be noted that uplink transmission usually uses terminal device-specific information, such as using C-RNTI to scramble the data carried in the uplink shared channel (Uplink Shared Channel, UL-SCH). But the conflict has not been resolved at this time, so when scrambling Msg 3 cannot be based on C-RNTI, only TC-RNTI can be used.

Step 4. The network device sends Msg 4.

The network device sends Msg 4 to the terminal device, and the terminal device correctly receives the Msg 4 to complete the contention resolution (Contention Resolution). For example, during the RRC connection establishment process, Msg 4 may carry the RRC connection establishment message.

Since the terminal equipment in step 3 will carry its own unique identifier in Msg3, such as C-RNTI or identification information from the core network (such as S-TMSI or a random number), the network equipment will be in the contention resolution mechanism. Msg4 carries the unique identifier of the terminal device to specify the terminal device that wins the competition. Other terminal devices that did not win in the contention resolution will re-initiate random access. The PDCCH used for scheduling Msg4 can be scrambled using TC-RNTI.

In a 5G system, when a terminal device performs random access, in addition to the above-mentioned 4-step random access method, a 2-step random access method can also be used. One possible method is to send the messages Msg 1 and Msg 3 in the 4-step random access process as the first message in the 2-step random access process; send Msg 2 and Msg 2 in the 4-step random access process Msg 4 is sent as the second message in the 2-step random access process.

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

Step 1. The terminal device sends the first message.

The first message may include the 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 (PUSCH). Wherein, the uplink channel may, for example, carry identification information of the terminal device and the reason for the RRC request. The first message may carry part or all of the information carried in Msg 1 and Msg 3 in the 4-step random access process.

Step 2. The network device sends the second message.

If the network device successfully receives the first message sent by the terminal device, it sends the second message to the terminal device. The second message may include conflict resolution information, C-RNTI allocation information, TA adjustment information, etc., for example. The second message may carry part or all of the information carried in Msg 2 and Msg 4 in 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 the 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.

Among them, the first message to the fourth message in the 4-step random access process are called "Msg 1, Msg 2, Msg 3, and Msg 4" respectively. Accordingly, the first message in the 2-step random access process is referred to here. One message and the second message are also called "Msg A or New Msg 1 (New_Msg 1)" and "Msg B or New Msg 2 (New_Msg 2)" respectively. It should be understood that Fig. 2 or Fig. 3 are only examples. Among them, Msg A may include part or all of the information carried in Msg 1 and Msg 3. Msg B may include part or all of the information carried in Msg 2 and Msg 4.

Since the 2-step random access process has not yet entered the standardization stage, only Figure 3 is used as an example for introduction. There are other possibilities for the definition of each random access message involved, and the 2-step random access is not limited. Other definitions of each random access message in the process. The method described in the embodiment of this application is applicable to all other 2-step random access procedures.

In the 2-step random access process, the transmission resource of the first message includes the second PUSCH resource used to transmit the PUSCH in the first message and the second physical resource used to transmit the preamble in the first message. Random Access Channel (Physical Random Access Channel, PRACH) resources. For example, as shown in FIG. 4, the second PRACH resource is located before the second PUSCH resource, and a guard time (GT) can be configured between the second PRACH resource and the second PUSCH resource. In the embodiment of the present application, the resource configuration for transmitting the first message shown in FIG. 4 is referred to as the second type of resource.

The channel resource used to transmit the first message may appear periodically in time. Based on the second type of resource shown in Figure 4, the terminal device needs to wait until the timing of the preamble to be sent before sending the first message, that is, the preamble part of the first message is sent first, and then the first message is sent. The PUSCH part of the message. In this way, once the terminal device expects to send the first message later than the start time of the second PRACH resource, the terminal device can only wait until the next cycle to send the first message, adding the first message The delay of 2 steps also increases the delay of the 2-step random access process.

In order to avoid the delay of the first message, this embodiment of the present application proposes a random access scheme, which reduces the cost of the first message by configuring the first type of resources used to send the first message. Transmission delay.

In the embodiments of the present application, the first-type resources and the second-type resources may be configured at the same time, or only the first-type resources or only the second-type resources may be configured. The following describes the first-type resources in the embodiments of the present application with reference to Figs. 5 and 6, and the simultaneous configuration of the first-type resources and the second-type resources in the embodiments of the present application with reference to Figs. 7 to 13.

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 executed by a terminal device and a network device. The terminal device may be, for example, the terminal device 120 shown in FIG. 1, 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 terminal device sends the first message in the 2-step random access process, namely Msg A.

The first message includes the PUSCH and the preamble, and the PUSCH is sent before the preamble, that is, the PUSCH is sent before the preamble. The Orthogonal Frequency Division Multiplexing (OFDM) symbol or time slot where the first PUSCH resource is located is before the time slot or symbol where the preamble is located.

In other words, the terminal device may use the first type of resource to send the first message, where the first type of resource includes the first PUSCH resource and the first PRACH resource located after the first PUSCH resource, and the first PUSCH resource Used to send the PUSCH in the first message, and the first PRACH resource is used to send the preamble in the first message.

In 520, the network device receives the first message sent by the terminal device.

In this embodiment, the network device may configure a first type of resource for the terminal device. The first type of resource includes the first PUSCH resource used to transmit the PUSCH in the first message and the preamble used to transmit the first message. The first PRACH resource of the code, where the first PUSCH resource is located before the first PRACH resource. In this way, when the terminal device uses the first type of resource to send the first message, it can send the PUSCH in it first and then send the preamble, which ensures the timely transmission of the PUSCH and realizes the effective transmission of the first message.

Wherein, the first PUSCH resource is a time-frequency resource used to transmit the PUSCH; or, the first PUSCH resource is a time-frequency resource used to transmit the PUSCH and a demodulation reference signal (Dedicated Reference Signal, DMRS) corresponding to the PUSCH ), the DMRS is used to demodulate its corresponding PUSCH.

Optionally, there is a guard time between the first PUSCH resource and the first PRACH resource.

For example, as shown in FIG. 6, the first type of resource includes a first PUSCH resource and a first PRACH resource located after the first PUSCH resource, and a guard time GT1 is configured between the first PRACH resource and the first PUSCH.

Wherein, the protection time may be configured by the network device for the terminal device, or may be pre-configured, for example, as agreed in the protocol.

Optionally, the first PRACH resource is also used to transmit a cyclic prefix (Cyclic Prefix, CP) of the preamble, and the cyclic prefix is located before the preamble.

For example, as shown in FIG. 6, the terminal device sequentially transmits the cyclic prefix and the preamble on the first PRACH resource.

Optionally, the first PUSCH resource and the first PRACH resource do not overlap, partially overlap, or completely overlap in the frequency domain.

Optionally, the bandwidth of the first PUSCH resource and the first PRACH resource are the same or different.

For example, as shown in FIG. 6, the bandwidth of the first PUSCH resource is greater than the bandwidth of the first PRACH resource, and the first PUSCH resource and the first PRACH resource overlap in the frequency domain.

Optionally, multiple first PUSCH resources correspond to multiple preambles one-to-one; and/or one first PUSCH resource corresponds to multiple preambles; and/or, one preamble corresponds to multiple preambles One PUSCH.

It is assumed that the first PUSCH resource configured by the network device includes PUSCH resource 1, PUSCH resource 2, ..., PUSCH resource M, and these M PUSCH resources correspond to N preambles. M=N or M≠N. For example, the correspondence between M PUSCH resources and N preambles shown in Table 1. If the preamble index of the preamble in the first message is index 1, the terminal device sends the PUSCH in the first message on PUSCH resource 1; if the preamble index of the preamble in the first message If it is index 2 or index 3, the terminal device sends the PUSCH in its first message on PUSCH resource 2.

Table I

In the embodiment of the present application, the first PUSCH resource may also have a corresponding relationship with the first PRACH resource. For example, the first PUSCH resource corresponds to the first PRACH resource one to one; and/or the first PUSCH resource corresponds to a plurality of the first PRACH resources; or, the first PRACH resource corresponds to a plurality of the first PRACH resources; PUSCH resources.

The resources used to transmit the first message may be configured periodically. In a resource period of the first message, the number of resources of the first type may be configured by the network device or pre-configured, for example, as stipulated in the protocol .

When the number of the first-type resources is multiple, optionally, the terminal device may select the resource with the best signal quality among the multiple first-type resources to send its first message.

For example, the terminal device can measure the reference signal receiving power (RSRP) or the reference signal receiving quality (RSRQ) of the synchronization signal block (Synchronization Signal Block, SSB or SS/PBCH Block), And send the first message on the first type resource corresponding to the synchronization signal block with the best measurement result.

For network devices, there are two ways to implement the reception of the first message sent on the first type of resource.

In one implementation, in 520, the network device receives the first message, including: the network device buffers the received PUSCH; if the network device successfully detects the preamble in the first message, the network device is buffering In the PUSCH, detect the PUSCH in the first message.

Wherein, the network device detects the PUSCH in the first message in the buffered PUSCH, including: the network device determines the location of the first PUSCH resource corresponding to the preamble according to the successfully detected preamble; the network device is in the On the first PUSCH resource, the PUSCH in the first message is detected.

In another implementation manner, in 520, the network device receiving the first message includes: the network device blindly checking the PUSCH in the first message on all the first PUSCH resources.

For example, the terminal device uses the first type of resource to send the first message. Since the PUSCH is sent before the preamble, the network device can receive and buffer all the PUSCH according to the configuration of the first type of resource, and the network device further receives the preamble. If the preamble is detected, the PUSCH on the first PUSCH resource corresponding to the preamble is detected. The network device may, for example, determine the position of the first PUSCH resource corresponding to the preamble based on the detected preamble and the correspondence between the preamble and the PUSCH resource, and detect the PUSCH received on the first PUSCH resource .

For another example, the terminal device uses the first type of resource to send the first message. Since the PUSCH is sent before the preamble, the network device blindly detects the PUSCH from the PUSCH resources in all the first messages. Specifically, the network device may detect the DMRS corresponding to the PUSCH to determine whether the first message is sent. If the network device detects the DMRS, it further detects the PUSCH corresponding to the DMRS.

Further, the network device may also configure a second type of resource for the terminal device. The second type of resource includes a second PRACH resource and a second PUSCH resource located after the second PRACH resource. The second PUSCH resource is used to transmit the second PRACH resource. For PUSCH in one message, the second PRACH resource is used to transmit the preamble in the first message. When the network device configures the first type of resource and the second type of resource for the terminal device at the same time, the time delay of the first message can be greatly reduced, thereby reducing the time delay of the 2-step random access process. A detailed description will be given below with reference to FIGS. 7 to 13.

FIG. 7 is a schematic flowchart of a random access method 700 according to an embodiment of the present application. As shown in FIG. 7, the method described in FIG. 7 may be executed by a terminal device and a network device. The terminal device may be, for example, the terminal device 120 shown in FIG. 1, and the network device may be, for example, the network shown in FIG. Equipment 110. As shown in FIG. 7, the random access method 700 may include some or all of the following steps. among them:

In 710, the terminal device selects a target resource type from the first type of resource and the second type of resource.

In 720, the terminal device uses the target resource type to send the first message (namely Msg A) in the 2-step random access.

Wherein, the first type of resource includes a first PUSCH resource and a first PRACH resource located after the first PUSCH resource, and the second type of resource includes a second PRACH resource and a second PUSCH resource located after the second PRACH resource, The first PUSCH resource and the second PUSCH resource are used to transmit the PUSCH in the first message, and the first PRACH resource and the second PRACH resource are used to transmit the preamble in the first message.

It should be understood that the "used for" mentioned herein can also be understood as "able to be used for", which means an ability. For example, the first PUSCH resource and the second PUSCH resource are used to transmit the PUSCH in the first message, which means that both the first PUSCH resource and the second PUSCH resource can be used to transmit the PUSCH in the first message , But only the PUSCH resource finally selected by the terminal device actually transmits the PUSCH. For another example, the first PRACH resource and the second PRACH resource are used to transmit the preamble in the first message, indicating that both the first PRACH resource and the second PRACH resource can be used to transmit the first message However, only the PRACH resource finally selected by the terminal device actually transmits the preamble.

In 730, the network device receives the first message sent by the terminal device.

In this embodiment, the network device can configure the first type of resource and the second type of resource for the terminal device at the same time, and the first type of resource includes the first PUSCH resource for transmitting the PUSCH and the first PRACH resource for transmitting the preamble, The first PUSCH resource is located before the first PRACH resource. The second type of resource includes a second PUSCH resource used for transmitting PUSCH and a second PRACH resource used for transmitting a preamble, where the second PUSCH resource is located after the second PRACH resource. The terminal device can select a suitable resource from the two types of resources to transmit the first message. Even if one of the resources is currently missed, it can use the other resource to continue to transmit the first message without waiting for the next resource. Period, greatly reducing the transmission delay of the first message.

When the terminal device selects the first type of resource to send the first message, the PUSCH in the first message is sent before the preamble; when the terminal device selects the second type of resource to send the first message, the preamble in the first message The code is sent before PUSCH. Therefore, it can also be said that when the terminal device sends the first message, it can choose to send the PUSCH first and then the preamble, or send the preamble first and then the PUSCH according to the actual situation.

Wherein, the first PUSCH resource is a time-frequency resource used to transmit the PUSCH; or, the first PUSCH resource is a time-frequency resource used to transmit the PUSCH and a DMRS corresponding to the PUSCH, and the DMRS is used to demodulate its corresponding Of the PUSCH.

The second PUSCH resource is a time-frequency resource used to transmit the PUSCH; or, the second PUSCH resource is a time-frequency resource used to transmit the PUSCH corresponding to the PUSCH, and the DMRS is used to demodulate the corresponding PUSCH .

Optionally, a guard time GT1 may be set between the first PUSCH resource and the first PRACH resource. A guard time GT2 may be set between the second PUSCH resource and the second PRACH resource. The GT1 and the GT2 may be configured by the network device for the terminal device, or may be pre-configured, for example, as agreed in a protocol. Among them, GT1=GT2 or GT1≠GT2.

The time domain length of the first type resource and the second type resource may be the same or different.

Preferably, the time domain length of the first type resource and the second type resource are the same, and the time domain length of the first PRACH resource and the second PRACH resource are the same, and the time domain length of the first PUSCH resource and the second PUSCH resource are the same .

The time domain location of the first type resource and the second type resource are different. This application does not limit the sequence of the first type of resource and the second type of resource in the time domain.

In an implementation manner, the first type of resource is located before the second type of resource. For example, the time domain start position of the first PUSCH resource in the first type resource is located before the time domain start position of the second PRACH resource in the second type resource.

Further, optionally, the first PRACH resource and the second PRACH resource overlap in the time domain and/or the frequency domain.

Taking Fig. 8(a) and Fig. 8(b) as an example, in one resource period of the first message, the first type of resource is located before the second type of resource. The first type of resource includes the first PUSCH resource, the guard time GT1, and the first PRACH resource in order from front to back in the time domain. One PUSCH is transmitted on each first PUSCH resource, such as PUSCH 1, PUSCH 2, etc. Each preamble resource in the first PRACH resource transmits a preamble, such as preamble 1, preamble 2, and so on.

The second type of resource includes the second PRACH resource, the guard time GT2, and the second PUSCH resource in order from front to back in the time domain. One PUSCH is transmitted on each second PUSCH resource, such as PUSCH 3, PUSCH 4, etc. Each preamble resource in the second PRACH resource transmits a preamble, such as preamble 3, preamble 4, and so on.

As shown in Figure 8(a), the first type of resource is located before the second type of resource. The first PRACH resource in the first type of resource and the second PRACH resource in the second type of resource completely overlap in the time domain. Among them, one PRACH resource includes multiple preamble resources, each preamble resource is used to transmit one preamble, and one PRACH resource can transmit multiple preamble resources.

As shown in Figure 8(b), the first type of resource is located before the second type of resource. The first PRACH resource in the first type resource and the second PRACH resource in the second type resource partially overlap in the time domain. Of course, the resources of the first type and the resources of the second type may not overlap in the time domain. The embodiments of the present application do not make any restriction on the time-frequency positions of the first-type resources and the second-type resources.

Further, for example, as shown in FIG. 9(a), the first PRACH resource in the first type of resource and the second PRACH resource in the second type of resource overlap both in the time domain and the frequency domain. That is, the first type resources and the second type resources share PRACH resources.

The first PRACH resource and the second PRACH resource are the same PRACH resource, but different parts of the same PRACH resource may belong to the first type of resource and the second type of resource, respectively. For example, the part of the same PRACH resource that belongs to the first type of resource is used to transmit preamble 0 to preamble 5, and the part of the same PRACH resource that belongs to the second type of resource is used to transmit preamble 6 to preamble. 11. If the terminal device selects the first type of resource, it selects the preamble carried in the first message from preamble 0 to preamble 5, and sends the PUSCH on the PUSCH resource corresponding to the selected preamble; if the terminal device selects For the second type of resources, the preamble carried in the first message is selected from preamble 6 to preamble 1, and the PUSCH is sent on the PUSCH resource corresponding to the selected preamble.

For another example, as shown in FIG. 9(b), the preamble resource in the first PRACH resource and the preamble resource in the second PRACH resource overlap in the time domain and the frequency domain. That is, the first-type resources and the second-type resources share the same PRACH resources, and the first-type resources and the second-type resources share the preamble resources.

In another implementation manner, the second-type resource is located before the first-type resource. For example, the time domain start position of the second PRACH resource in the second type resource is located before the time domain start position of the first PUSCH resource in the first type resource.

Further, optionally, the first PUSCH resource and the second PUSCH resource overlap in the time domain and/or the frequency domain.

Taking Fig. 10(a) and Fig. 10(b) as an example, in one resource period of the first message, the second type resource is located before the first type resource. The second type of resource includes the second PRACH resource, the guard time GT2, and the second PUSCH resource in order from front to back in the time domain. One PUSCH is transmitted on each second PUSCH resource, such as PUSCH 1, PUSCH 2, etc. Each preamble resource in the second PRACH resource transmits a preamble, such as preamble 1, preamble 2, and so on.

The first type of resource includes the first PUSCH resource, the guard time GT1, and the first PRACH resource in order from front to back in the time domain. One PUSCH is transmitted on each second PUSCH resource, such as PUSCH 3, PUSCH 4, etc. Each preamble resource in the second PRACH resource transmits a preamble, such as preamble 3, preamble 4, and so on.

As shown in Figure 10(a), the second type of resource is located before the first type of resource. The second PUSCH resource in the second type resource and the first PUSCH resource in the first type resource completely overlap in the time domain.

As shown in Figure 10(b), the second type of resource is located before the first type of resource. The second PUSCH resource in the second type resource and the first PUSCH resource in the first type resource partially overlap in the time domain.

Of course, the resources of the first type and the resources of the second type may not overlap in the time domain. The embodiments of the present application do not make any restriction on the time-frequency positions of the first-type resources and the second-type resources.

Further, for example, as shown in FIG. 11, the first PUSCH resource and the second PUSCH resource may overlap in both the time domain and the frequency domain.

Optionally, multiple second PUSCH resources correspond to multiple preambles one-to-one; and/or one second PUSCH resource corresponds to multiple preambles; and/or, one preamble corresponds to multiple first preambles Two PUSCH.

This application does not limit the mapping relationship between PUSCH resources and preambles. In addition, the mapping manner between the preamble and PUSCH resources transmitted on the first type of resources may be the same or different from the mapping manner between the preamble and PUSCH resources transmitted on the second type of resources.

Optionally, there may also be a corresponding relationship between the first PUSCH resource and the first PRACH resource. For example, the first PUSCH resource corresponds to the first PRACH resource one to one; and/or the first PUSCH resource corresponds to a plurality of the first PRACH resources; or, the first PRACH resource corresponds to a plurality of the first PRACH resources; PUSCH resources.

Optionally, there may also be a correspondence between the second PUSCH resource and the second PRACH resource. For example, the second PUSCH resource corresponds to the second PRACH resource one-to-one; and/or, the second PUSCH resource corresponds to a plurality of the second PRACH resources; or, the second PRACH resource corresponds to a plurality of the second PRACH resources PUSCH resources.

In this embodiment, when the first type of resource is located before the second type of resource, the first PRACH resource and the second PRACH resource are configured to overlap in the time domain and/or the frequency domain, or the first type of resource is located in the second type of resource After that, the first PUSCH resource and the second PUSCH resource are configured to overlap in the time domain and/or the frequency domain, which can reduce resource overhead while reducing the transmission delay of the first message.

Optionally, the number of resources of the first type and the number of resources of the second type in a resource period of the first message are the same or different.

The number of resources of the first type and the number of resources of the second type may be configured by a network device, or may be pre-configured, for example, as agreed in an agreement. The network device may configure different numbers of the first-type resources and the second-type resources for the terminal device, or may configure the same number of the first-type resources and the second-type resources for the terminal device.

Optionally, in 710, the terminal device selects the target resource type from the first type resource and the second type resource, including: the terminal device selects the target resource type from the current time among the first type resource and the second type resource The resource type that can be used to transmit the first message at the earliest is the target resource type.

Wherein, the current moment may be the moment when the terminal device expects to perform the 2-step random access procedure or the moment when it expects to send the first message, or the moment when the terminal device decides to execute the 2-step random access procedure or decides to send the The moment of the first message.

The terminal device needs to select one of the first type of resource and the second type of resource to send its first message. Specifically, the terminal device will select the earliest resource type that can be used to transmit the first message from the current moment. As the target resource type. It should be noted here that the terminal device must not only consider the sequence of the first type of resource and the second type of resource in the time domain, but also consider whether the first type of resource and the second type of resource can be used from the current moment.

Taking Figure 12 as an example, assuming that the second type of resource is located before the first type of resource, if the terminal device expects to initiate a 2-step random access at time T1, then the earliest resource that can be used to transmit the first message from time T1 is For the second type of resource in resource period 2, the terminal device will use the second type of resource to sequentially send the preamble and PUSCH in its first message. If the terminal device expects to initiate a 2-step random access at time T2, since the terminal device has missed the first part of the second type of resources in resource cycle 2 at time T2, and therefore cannot use the second type of resources, then start from T2 The earliest resource that can be used to transmit the first message is the first-type resource in resource period 2. The terminal device will use the first-type resource to send the PUSCH and preamble in its first message in sequence.

After the terminal device selects the target resource type from the first type of resource and the second type of resource, optionally, the terminal device may select the resource with the best signal quality among multiple resources belonging to the target resource type to send the second resource type. a message.

For example, the terminal device can measure the RSRP or RSRQ of the SSB. If the terminal device selects the first type of resource, the first message is sent on the first type of resource with the highest RSRP and/or the highest RSRQ; if the terminal device selects If the second type of resource is used, the first message is sent on the second type of resource corresponding to the SSB with the highest RSRP and/or the highest RSRQ.

Optionally, the network device may also configure the first transmission window and the second transmission window. Wherein, the first type resource and the second type resource in a resource period correspond to the first transmission window and the second transmission window, respectively. The first transmission window and the second transmission window are used to transmit the second message (ie, Msg B) in the 2-step random access process.

If the network device receives the first message sent by the terminal device on the first type of resource, it sends the second message to the terminal device in the first transmission window; and/or, if the network device When the first message sent by the terminal device is received on the second-type resource, the second message is sent to the terminal device in the second transmission window.

Correspondingly, if the terminal device uses the first type of resource to send the first message, the terminal device receives the second message in the first transmission window; and/or if the terminal device uses the second type of resource After sending the first message, the terminal device receives the second message in the second transmission window.

Optionally, the length of the second transmission window and the first transmission window may be the same or different.

Optionally, the time domain start position of the second transmission window and the first transmission window are the same or different.

For example, the time domain start position of the first transmission window is immediately adjacent to the time domain end position of the first type resource, or between the time domain start position of the first transmission window and the time domain end position of the first type resource There is a time interval.

For example, the time domain start position of the second transmission window is immediately adjacent to the time domain end position of the second type resource, or between the time domain start position of the second transmission window and the time domain end position of the second type resource There is a time interval.

For example, as shown in Figure 13 (a) and Figure 13 (b), the first type of resource in Figure 13 (a) is located before the second type of resource, and the second type of resource in Figure 13 (b) is located in the first type of resource Previously, the first transmission window and the second transmission window in Figure 13 (a) and Figure 13 (b) were located after the first type of resource and the second type of resource, and the length of the first transmission window and the length of the second transmission window The length is equal. The terminal device sends the first message on the first type of resource, the network device receives the first message on the first type of resource, and then the network device sends the second message in the first transmission window, and the terminal device transmits Receive the second message in the window. Or, the terminal device sends the first message on the second type resource, the network device receives the first message on the second type resource, and then the network device sends the second message in the second transmission window, and the terminal device The second message is received in the second transmission window.

Optionally, the first transmission window and the second transmission window may be used for the terminal device to blindly check a physical downlink control channel (Physical Downlink Control Channel, PDCCH), and the PDCCH is used to schedule the physical downlink sharing that carries the second message Channel (Physical Downlink Shared Channel, PDSCH).

Taking the first receiving window as an example, the network device sends the PDCCH in the first transmission window, and the PDCCH is used to schedule the PDSCH that carries the second message. The terminal device blindly detects the PDCCH in the first transmission window, and the DCI carried in the PDCCH is used to indicate the resource information of the PDSCH, so that the terminal device is at the resource position in the second transmission window according to the resource position indicated by the DCI Receive the PDSCH carrying the second message sent by the network device.

If the first transmission window and the second transmission window include an uplink time slot (UL slot), the terminal device in the uplink time slot does not need to try to receive the second message.

The method in the embodiments of the present application can be applied to various random access procedures, not just the initial access procedures. In addition, the method of the embodiment of the present application can be applied to a contention-based random access process (contention-based RACH) and a non-competition-based random access process (contention free RACH).

It should be noted that, under the premise of no conflict, the various embodiments described in this application and/or the technical features in each embodiment can be combined with each other arbitrarily, and the technical solutions obtained after the combination should also fall within the protection scope of this application. .

In the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not correspond to the implementation process of the embodiments of the present application. Constitute any limitation.

The communication method according to the embodiment of the present application is described in detail above. The device according to the embodiment of the present application will be described below in conjunction with FIG. 14 to FIG. 19. The technical features described in the method embodiment are applicable to the following device embodiments.

FIG. 14 is a schematic block diagram of a terminal device 1400 according to an embodiment of the present application. As shown in FIG. 14, the terminal device 1400 includes a processing unit 1410 and a transceiver unit 1420. among them:

The processing unit 1410 is configured to generate the first message in 2-step random access, where the first message includes a physical uplink shared channel PUSCH and a preamble;

The transceiver unit 1420 is configured to send the first message, where the PUSCH is sent before the preamble.

Therefore, by configuring the first type of resource used to transmit the first message in the 2-step random access process, the first type of resource includes the first PUSCH resource and the first PRACH resource located after the first PUSCH resource, so that The terminal device can sequentially send the PUSCH and the preamble in the first message on the first PUSCH resource and the first PRACH resource, thereby realizing effective transmission of the first message.

Optionally, the transceiving unit 1420 is specifically configured to send the first message using a first-type resource, where the first-type resource includes a first PUSCH resource and a first PUSCH resource located after the first PUSCH resource. A PRACH resource, the first PUSCH resource is used to send the PUSCH, and the first PRACH resource is used to send the preamble.

Optionally, the first PRACH resource is also used to transmit a cyclic prefix of the preamble, and the cyclic prefix is located before the preamble.

Optionally, multiple first PUSCH resources correspond to multiple preambles one-to-one; and/or one first PUSCH resource corresponds to multiple preambles; and/or, one preamble corresponds to multiple The first PUSCH resource.

Optionally, the first PUSCH resource is a time-frequency resource used to transmit the PUSCH, or the first PUSCH resource is a time-frequency resource used to transmit the PUSCH and a demodulation reference signal corresponding to the PUSCH DMRS.

It should be understood that the terminal device 1400 can perform corresponding operations performed by the terminal device in the method 500 of the embodiment of the present application, and for the sake of brevity, details are not described herein again.

FIG. 15 is a schematic block diagram of a terminal device 1500 according to an embodiment of the present application. As shown in FIG. 15, the terminal device 1500 includes a processing unit 1510 and a transceiver unit 1520. among them:

The processing unit 1510 is configured to select a target resource type from the first type of resource and the second type of resource;

The transceiver unit 1520 is configured to use the target resource type to send the first message in 2-step random access;

Therefore, by configuring the first type of resource and the second type of resource at the same time, the first type of resource includes the first PUSCH resource and the first PRACH resource located after the first PUSCH resource, and the second type of resource includes the second PRACH resource and the first PRACH resource located there. The second PUSCH resource after the second PRACH resource enables the terminal device to select a suitable resource from the two types of resources to transmit the first message. Even if one type of resource is currently missed, the other type of resource can be used to continue transmission. The first message does not have to wait until the next resource period, which greatly reduces the delay of the first message, and further reduces the delay of the 2-step random access process.

Optionally, the second type of resource is located before the first type of resource.

Optionally, the first PUSCH resource and the second PUSCH resource overlap in the time domain and/or the frequency domain.

Optionally, the first type of resource is located before the second type of resource.

Optionally, the first PRACH resource and the second PRACH resource overlap in the time domain and/or the frequency domain.

Optionally, the time domain length of the first type resource and the second type resource are the same or different.

Optionally, there is a guard time between the second PRACH resource and the second PUSCH resource.

Optionally, the guard time between the first PUSCH resource and the first PRACH resource is the same as or different from the guard time between the second PRACH resource and the second PUSCH resource.

Optionally, multiple second PUSCH resources correspond to multiple preambles one-to-one; and/or, one second PUSCH resource corresponds to multiple preambles; and/or, one preamble corresponds to multiple The second PUSCH resource.

Optionally, the first PUSCH resource is a time-frequency resource used for transmitting the PUSCH, or the first PUSCH resource is a time-frequency resource used for transmitting the PUSCH and a DMRS corresponding to the PUSCH.

Optionally, the second PUSCH resource is a time-frequency resource used for transmitting the PUSCH, or the second PUSCH resource is a time-frequency resource used for transmitting the PUSCH and a DMRS corresponding to the PUSCH.

Optionally, the number of resources of the first type and the number of resources of the second type in one resource period of the first message are the same or different.

Optionally, the processing unit 1510 is specifically configured to: among the first-type resources and the second-type resources, select the resource type that can be used to transmit the first message at the earliest from the current moment as the source. State the target resource type.

Optionally, the transceiving unit 1520 is specifically configured to select a resource with the best signal quality among multiple resources belonging to the target resource type to send the first message.

Optionally, the first type of resource and the second type of resource in one resource period correspond to a first transmission window and a second transmission window, respectively, and the transceiving unit 1520 is further configured to: if the first type of resource is used Class resources send the first message, then receive the second message in 2-step random access in the first transmission window; and/or, if the second class resources are used to send the first message , The second message is received in the second transmission window.

Optionally, the first transmission window and the second transmission window are used for the terminal device to blindly detect a PDCCH, and the PDCCH is used for scheduling a PDSCH carrying the second message.

Optionally, the time domain start position of the second transmission window and the first transmission window are different.

Optionally, the time domain start position of the first transmission window is immediately adjacent to the time domain end position of the first type resource, and/or the time domain start position of the second transmission window is immediately adjacent to the second The end position of the time domain of the class resource.

Optionally, there is a time interval between the time domain start position of the first transmission window and the time domain end position of the first type resource, and/or the time domain start position of the second transmission window There is a time interval between the end position of the time domain of the second type resource.

Optionally, the length of the second transmission window and the first transmission window are the same or different.

It should be understood that the terminal device 1500 can perform corresponding operations performed by the terminal device in the method 700 of the embodiment of the present application, and for the sake of brevity, details are not described herein again.

FIG. 16 is a schematic block diagram of a network device 1600 according to an embodiment of the present application. As shown in FIG. 16, the network device 1600 includes a processing unit 1610 and a transceiver unit 1620. among them:

The processing unit 1610 is configured to configure resources of the first type;

The transceiver unit 1620 is configured to indicate the first-type resource to the terminal device;

Wherein, the first type of resource includes a first PUSCH resource and a first PRACH resource located after the first PUSCH resource, and the first PUSCH resource is used to transmit information in the first message in 2-step random access. PUSCH, the first PRACH resource is used to transmit the preamble in the first message.

Therefore, the first type of resource used to transmit the first message in the 2-step random access process is configured, where the first type of resource includes the first PUSCH resource and the first PRACH resource located after the first PUSCH resource, so The terminal device can sequentially send the PUSCH and the preamble in the first message on the first PUSCH resource and the first PRACH resource, thereby realizing effective transmission of the first message. Further, when the first type of resource and the second type of resource are configured at the same time, the second type of resource includes a second PRACH resource and a second PUSCH resource located after the second PRACH resource, and the terminal device can be in the two types of resources Choose a suitable type of resource to transmit the first message. Even if one type of resource is currently missed, another type of resource can be used to continue to transmit the first message without waiting for the next resource cycle, which greatly reduces the first message. The delay of the message.

Optionally, the processing unit 1610 is further configured to configure a second type of resource; the transceiving unit 1620 is further configured to: indicate the second type of resource to the terminal device; wherein, the second type of resource includes A second PRACH resource and a second PUSCH resource located after the second PRACH resource, the second PUSCH resource is used to transmit the PUSCH in the first message, and the second PRACH resource is used to transmit the first message. The preamble in a message.

Optionally, the processing unit 1610 is further configured to configure a first transmission window and a second transmission window; wherein, the transceiving unit 1620 is further configured to: if the terminal device is received on the first type resource If the first message is sent, the second message in 2-step random access is sent to the terminal device in the first transmission window; and/or, if it is received on the second type of resource If the first message sent by the terminal device is sent, the second message is sent to the terminal device in the second transmission window.

Optionally, the first transmission window and the second transmission window are used to send a physical downlink control channel PDCCH, and the PDCCH is used to schedule a physical downlink shared channel PDSCH that carries the second message.

It should be understood that the network device 1600 can perform the corresponding operations performed by the network device in the methods of the various embodiments of the present application. For the sake of brevity, details are not described herein again.

FIG. 17 is a schematic structural diagram of a communication device 1700 according to an embodiment of the present application. The communication device 1700 shown in FIG. 17 includes a processor 1710, and the processor 1710 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 17, the communication device 1700 may further include a memory 1720. The processor 1710 may call and run a computer program from the memory 1720 to implement the method in the embodiment of the present application.

The memory 1720 may be a separate device independent of the processor 1710, or may be integrated in the processor 1710.

Optionally, as shown in FIG. 17, the communication device 1700 may further include a transceiver 1730, and the processor 1710 may control the transceiver 1730 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.

Among them, the transceiver 1730 may include a transmitter and a receiver. The transceiver 1730 may further include an antenna, and the number of antennas may be one or more.

Optionally, the communication device 1700 may specifically be a terminal device of an embodiment of the present application, and the communication device 1700 may implement the corresponding procedures implemented by the terminal device in each method of the embodiments of the present application. For brevity, details are not repeated here. .

Optionally, the communication device 1700 may specifically be a network device of an embodiment of the application, and the communication device 1700 may implement the corresponding process implemented by the network device in each method of the embodiment of the application. For brevity, details are not repeated here. .

FIG. 18 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 1800 shown in FIG. 18 includes a processor 1810, and the processor 1810 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 18, the chip 1800 may further include a memory 1820. The processor 1810 can call and run a computer program from the memory 1820 to implement the method in the embodiment of the present application.

The memory 1820 may be a separate device independent of the processor 1810, or may be integrated in the processor 1810.

Optionally, the chip 1800 may further include an input interface 1830. The processor 1810 can control the input interface 1830 to communicate with other devices or chips. Specifically, it can obtain information or data sent by other devices or chips.

Optionally, the chip 1800 may further include an output interface 1840. The processor 1810 can control the output interface 1840 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.

Optionally, the chip can be applied to the terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the terminal device in the various methods of the embodiment of the present application. For brevity, details are not repeated here.

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 the various methods of the embodiment of the present application. For brevity, details are not described herein again.

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

The processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the 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 (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other 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 can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, 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 can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase 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 exemplary but not restrictive description, 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 Rambus RAM (DR RAM).

The above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), and 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 dynamics Random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiment of the present application is intended to include but not limited to these and any other suitable types of memory.

FIG. 19 is a schematic block diagram of a communication system 1900 according to an embodiment of the present application. As shown in FIG. 19, the communication system 1900 includes a network device 1910 and a terminal device 1920.

Wherein, the network device 1910 is used to configure the first type of resource;

The terminal device 1920 is configured to: use the first-type resource to send the first message in 2-step random access;

The network device 1910 can be used to implement the corresponding functions implemented by the network device in the method of the embodiments of the present application, and the composition of the network device 1910 can be as shown in the network device 1600 in FIG. 16. For brevity, it will not be omitted here. Repeat.

The terminal device 1920 may be used to implement the corresponding functions implemented by the terminal device in the method of the embodiment of the present application, and the composition of the terminal device 1920 may be as shown in the terminal device 1400 in FIG. 14. For the sake of brevity, it will not be omitted here. Repeat.

FIG. 20 is a schematic block diagram of a communication system 2000 according to an embodiment of the present application. As shown in FIG. 20, the communication system 2000 includes a network device 2010 and a terminal device 2020.

Wherein, the network device 2010 is used to configure the first-type resources and the second-type resources;

The terminal device 2020 is configured to select a target resource type from the first type of resource and the second type of resource, and use the target resource type to send the first message in the 2-step random access;

The network device 2010 can be used to implement the corresponding functions implemented by the network device in the method of the embodiment of the present application, and the composition of the network device 2010 can be as shown in the network device 1600 in FIG. 16. For the sake of brevity, it will not be omitted here. Repeat.

The terminal device 2020 can be used to implement the corresponding functions implemented by the terminal device in the method of the embodiment of the present application, and the composition of the terminal device 2020 can be as shown in the terminal device 1500 in FIG. 15. For the sake of brevity, it will not be omitted here. Repeat.

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

The embodiments of the present application also provide a computer program product, including computer program instructions. Optionally, the computer program product may be applied to the network device in the embodiment 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. For the sake of brevity, it is not here. Repeat it again. Optionally, the computer program product can be applied to the terminal device in the embodiment 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. For the sake of brevity, it is not here. Repeat it again.

The 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 caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity , I won’t repeat it here. Optionally, the computer program can be applied to the terminal device in the embodiment of the present application. When the computer program runs on the computer, it causes the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity , I won’t repeat it 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 only an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

In the embodiment of the present invention, "B corresponding (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 according to A does not mean that B is determined only according to A, and B can also be determined according to A and/or other information.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination 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 by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, 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 description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, 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 illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or may be Integrate 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 they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments 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 function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the 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 make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment 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 are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A random access method, characterized in that it comprises:

The terminal device sends the first message in the 2-step random access, the first message includes the physical uplink shared channel PUSCH and the preamble, and the PUSCH is sent before the preamble.
The method according to claim 1, wherein the terminal device sending the first message in 2-step random access includes:

The terminal device uses a first type of resource to send the first message, where the first type of resource includes a first PUSCH resource and a first PRACH resource located after the first PUSCH resource, and the first PUSCH resource The resource is used to send the PUSCH, and the first PRACH resource is used to send the preamble.
The method according to claim 2, wherein there is a guard time between the first PUSCH resource and the first PRACH resource.
The method according to claim 2 or 3, wherein the first PRACH resource is also used to transmit a cyclic prefix of the preamble, and the cyclic prefix is located before the preamble.
The method according to any one of claims 2 to 4, wherein the first PUSCH resource and the first PRACH resource do not overlap, partially overlap, or completely overlap in the frequency domain.
The method according to any one of claims 2 to 5, wherein the bandwidths of the first PUSCH resource and the first PRACH resource are the same or different.
The method according to any one of claims 2 to 6, characterized in that,

The multiple first PUSCH resources correspond to multiple preambles one-to-one; and/or,

One said first PUSCH resource corresponds to multiple preambles; and/or,

One preamble corresponds to a plurality of the first PUSCH resources.
The method according to any one of claims 2 to 7, wherein the first PUSCH resource is a time-frequency resource used to transmit the PUSCH, or the first PUSCH resource is used to transmit the The time-frequency resource of the PUSCH and the demodulation reference signal DMRS corresponding to the PUSCH.
A random access method, characterized in that it comprises:

The terminal device selects the target resource type from the first type of resource and the second type of resource;

The terminal device uses the target resource type to send the first message in 2-step random access;

Wherein, the first type resource includes a first PUSCH resource and a first PRACH resource located after the first PUSCH resource, and the second type resource includes a second PRACH resource and a first PRACH resource located after the second PRACH resource. Two PUSCH resources, the first PUSCH resource and the second PUSCH resource are used to transmit the PUSCH in the first message, and the first PRACH resource and the second PRACH resource are used to transmit the first The preamble in the message.
The method according to claim 9, wherein the second type of resource is located before the first type of resource.
The method according to claim 10, wherein the first PUSCH resource and the second PUSCH resource overlap in the time domain and/or the frequency domain.
The method according to claim 9, wherein the first-type resource is located before the second-type resource.
The method according to claim 12, wherein the first PRACH resource and the second PRACH resource overlap in the time domain and/or the frequency domain.
The method according to any one of claims 9 to 13, wherein the time domain length of the first type resource and the second type resource are the same or different.
The method according to any one of claims 9 to 14, wherein there is a guard time between the first PUSCH resource and the first PRACH resource.
The method according to any one of claims 9 to 15, wherein there is a guard time between the second PRACH resource and the second PUSCH resource.
The method according to any one of claims 9 to 16, wherein the guard time between the first PUSCH resource and the first PRACH resource is different from the second PRACH resource and the second PRACH resource. The guard time between PUSCH resources is the same or different.
The method according to any one of claims 9 to 17, characterized in that,

The multiple first PUSCH resources correspond to multiple preambles one-to-one; and/or,

One said first PUSCH resource corresponds to multiple preambles; and/or,

One preamble corresponds to a plurality of the first PUSCH resources.
The method according to any one of claims 9 to 18, wherein:

The multiple second PUSCH resources correspond to multiple preambles one-to-one; and/or,

One said second PUSCH resource corresponds to multiple preambles; and/or,

One preamble corresponds to multiple second PUSCH resources.
The method according to any one of claims 9 to 19, wherein the first PUSCH resource is a time-frequency resource used to transmit the PUSCH, or the first PUSCH resource is used to transmit the The time-frequency resource of the PUSCH and the demodulation reference signal DMRS corresponding to the PUSCH.
The method according to any one of claims 9 to 20, wherein the second PUSCH resource is a time-frequency resource used to transmit the PUSCH, or the second PUSCH resource is used to transmit the The time-frequency resource of the PUSCH and the DMRS corresponding to the PUSCH.
The method according to any one of claims 9 to 21, wherein the number of the first type of resources and the number of the second type of resources in one resource period of the first message are the same or different.
The method according to any one of claims 9 to 22, wherein the terminal device selecting the target resource type from the first type of resource and the second type of resource comprises:

The terminal device selects, among the first-type resources and the second-type resources, a resource type that can be used to transmit the first message earliest from the current moment as the target resource type.
The method according to any one of claims 9 to 23, wherein the terminal device uses the target resource type to send the first message in 2-step random access, comprising:

The terminal device selects the resource with the best signal quality among the multiple resources belonging to the target resource type to send the first message.
The method according to any one of claims 9 to 24, wherein the first type of resource and the second type of resource in one resource period correspond to a first transmission window and a second transmission window, respectively, The method also includes:

If the terminal device uses the first type of resource to send the first message, receive the second message in the 2-step random access in the first transmission window; and/or,

If the terminal device uses the second-type resource to send the first message, then the second message is received in the second transmission window.
The method according to claim 25, wherein the first transmission window and the second transmission window are used for the terminal device to blindly detect the physical downlink control channel PDCCH, and the PDCCH is used for scheduling and carrying the second transmission window. The physical downlink shared channel PDSCH for two messages.
The method according to claim 25 or 26, wherein the time domain start positions of the second transmission window and the first transmission window are different.
The method according to claim 27, wherein the time domain start position of the first transmission window is immediately adjacent to the time domain end position of the first type resource, and/or the time domain of the second transmission window The start position of the domain is close to the end position of the time domain of the second type resource.
The method according to claim 27, wherein there is a time interval between the time domain start position of the first transmission window and the time domain end position of the first type resource, and/or the first transmission window 2. There is a time interval between the time domain start position of the transmission window and the time domain end position of the second type of resource.
The method according to any one of claims 25 to 29, wherein the length of the second transmission window and the first transmission window are the same or different.
A random access method, characterized in that it comprises:

The network equipment configures the first type of resources;

Wherein, the first type of resource includes a first PUSCH resource and a first PRACH resource located after the first PUSCH resource, and the first PUSCH resource is used to transmit information in the first message in 2-step random access. PUSCH, the first PRACH resource is used to transmit the preamble in the first message.
The method according to claim 31, wherein there is a guard time between the first PUSCH resource and the first PRACH resource.
The method according to claim 31 or 32, wherein the first PRACH resource is also used to transmit a cyclic prefix of the preamble, and the cyclic prefix is located before the preamble.
The method according to any one of claims 31 to 33, wherein the first PUSCH resource and the first PRACH resource do not overlap, partially overlap, or completely overlap in the frequency domain.
The method according to any one of claims 31 to 34, wherein the bandwidths of the first PUSCH resource and the first PRACH resource are the same or different.
The method according to any one of claims 31 to 35, wherein:

The multiple first PUSCH resources correspond to multiple preambles one-to-one; and/or,

One said first PUSCH resource corresponds to multiple preambles; and/or,

One preamble corresponds to a plurality of the first PUSCH resources.
The method according to any one of claims 31 to 36, wherein the first PUSCH resource is a time-frequency resource used to transmit the PUSCH, or the first PUSCH resource is used to transmit the The time-frequency resource of the PUSCH and the demodulation reference signal DMRS corresponding to the PUSCH.
The method according to any one of claims 31 to 37, wherein the method further comprises:

The network device configures the second type of resource;

Wherein, the second type resource includes a second PRACH resource and a second PUSCH resource located after the second PRACH resource, and the second PUSCH resource is used to transmit the PUSCH in the first message. The second PRACH resource is used to transmit the preamble in the first message.
The method according to claim 38, wherein the second type of resource is located before the first type of resource.
The method according to claim 39, wherein the first PUSCH resource and the second PUSCH resource overlap in the time domain and/or the frequency domain.
The method according to claim 38, wherein the first type of resource is located before the second type of resource.
The method according to claim 41, wherein the first PRACH resource and the second PRACH resource overlap in the time domain and/or the frequency domain.
The method according to any one of claims 38 to 42, wherein the time domain length of the first type resource and the second type resource are the same or different.
The method according to any one of claims 38 to 43, wherein:

The multiple second PUSCH resources correspond to multiple preambles one-to-one; and/or,

One said second PUSCH resource corresponds to multiple preambles; and/or,

One preamble corresponds to multiple second PUSCH resources.
The method according to any one of claims 38 to 44, wherein the second PUSCH resource is a time-frequency resource used to transmit the PUSCH, or the second PUSCH resource is used to transmit the The time-frequency resource of the PUSCH and the DMRS corresponding to the PUSCH.
The method according to any one of claims 38 to 45, wherein the number of the first type of resources and the number of the second type of resources in one resource period of the first message are the same or different.
The method according to any one of claims 38 to 46, wherein the method further comprises:

The network device configures a first transmission window and a second transmission window;

If the network device receives the first message sent by the terminal device on the first type resource, it sends the first message in the 2-step random access to the terminal device in the first transmission window. Two messages; and/or,

If the network device receives the first message sent by the terminal device on the second type resource, it sends the second message to the terminal device in the second transmission window.
The method according to claim 47, wherein the first transmission window and the second transmission window are used to send a physical downlink control channel PDCCH, and the PDCCH is used to schedule a physical downlink control channel that carries the second message. Downlink shared channel PDSCH.
The method according to claim 47 or 48, wherein the time domain start positions of the second transmission window and the first transmission window are different.
The method according to claim 49, wherein the time domain start position of the first transmission window is immediately adjacent to the time domain end position of the first type resource, and/or the time domain of the second transmission window The start position of the domain is close to the end position of the time domain of the second type resource.
The method according to claim 49, wherein there is a time interval between the time domain start position of the first transmission window and the time domain end position of the first type of resource, and/or the first transmission window 2. There is a time interval between the time domain start position of the transmission window and the time domain end position of the second type of resource.
The method according to any one of claims 47 to 51, wherein the length of the second transmission window and the first transmission window are the same or different.
A terminal device, characterized in that it comprises:

A processing unit, configured to generate a first message in 2-step random access, where the first message includes a physical uplink shared channel PUSCH and a preamble;

The transceiver unit is configured to send the first message, where the PUSCH is sent before the preamble.
The terminal device according to claim 53, wherein the transceiver unit is specifically configured to:

The first message is sent using a first type of resource, where the first type of resource includes a first PUSCH resource and a first PRACH resource located after the first PUSCH resource, and the first PUSCH resource is used for sending The PUSCH and the first PRACH resource are used to send the preamble.
The terminal device of claim 54, wherein there is a guard time between the first PUSCH resource and the first PRACH resource.
The terminal device according to claim 54 or 55, wherein the first PRACH resource is also used to transmit a cyclic prefix of the preamble, and the cyclic prefix is located before the preamble.
The terminal device according to any one of claims 54 to 56, wherein the first PUSCH resource and the first PRACH resource do not overlap, partially overlap, or completely overlap in the frequency domain.
The terminal device according to any one of claims 54 to 57, wherein the bandwidths of the first PUSCH resource and the first PRACH resource are the same or different.
The terminal device according to any one of claims 54 to 58, wherein:

The multiple first PUSCH resources correspond to multiple preambles one-to-one; and/or,

One said first PUSCH resource corresponds to multiple preambles; and/or,

One preamble corresponds to a plurality of the first PUSCH resources.
The terminal device according to any one of claims 54 to 59, wherein the first PUSCH resource is a time-frequency resource used for transmission of the PUSCH, or the first PUSCH resource is used for transmission The time-frequency resource of the PUSCH and the demodulation reference signal DMRS corresponding to the PUSCH.
A terminal device, characterized in that it comprises:

The processing unit is used to select the target resource type from the first type of resource and the second type of resource;

The transceiver unit is configured to use the target resource type to send the first message in 2-step random access;

Wherein, the first type resource includes a first PUSCH resource and a first PRACH resource located after the first PUSCH resource, and the second type resource includes a second PRACH resource and a first PRACH resource located after the second PRACH resource. Two PUSCH resources, the first PUSCH resource and the second PUSCH resource are used to transmit the PUSCH in the first message, and the first PRACH resource and the second PRACH resource are used to transmit the first The preamble in the message.
The terminal device according to claim 61, wherein the second type of resource is located before the first type of resource.
The terminal device according to claim 62, wherein the first PUSCH resource and the second PUSCH resource overlap in the time domain and/or the frequency domain.
The terminal device according to claim 61, wherein the first-type resource is located before the second-type resource.
The terminal device according to claim 64, wherein the first PRACH resource and the second PRACH resource overlap in the time domain and/or the frequency domain.
The terminal device according to any one of claims 61 to 65, wherein the time domain length of the first type resource and the second type resource are the same or different.
The terminal device according to any one of claims 61 to 66, wherein there is a guard time between the first PUSCH resource and the first PRACH resource.
The terminal device according to any one of claims 61 to 67, wherein there is a guard time between the second PRACH resource and the second PUSCH resource.
The terminal device according to any one of claims 61 to 68, wherein the guard time between the first PUSCH resource and the first PRACH resource is different from the guard time between the second PRACH resource and the first PRACH resource. The guard time between the two PUSCH resources is the same or different.
The terminal device according to any one of claims 61 to 69, wherein:

The multiple first PUSCH resources correspond to multiple preambles one-to-one; and/or,

One said first PUSCH resource corresponds to multiple preambles; and/or,

One preamble corresponds to a plurality of the first PUSCH resources.
The terminal device according to any one of claims 61 to 70, wherein:

The multiple second PUSCH resources correspond to multiple preambles one-to-one; and/or,

One said second PUSCH resource corresponds to multiple preambles; and/or,

One preamble corresponds to multiple second PUSCH resources.
The terminal device according to any one of claims 61 to 71, wherein the first PUSCH resource is a time-frequency resource used for transmission of the PUSCH, or the first PUSCH resource is used for transmission The time-frequency resource of the PUSCH and the demodulation reference signal DMRS corresponding to the PUSCH.
The terminal device according to any one of claims 61 to 72, wherein the second PUSCH resource is a time-frequency resource used for transmission of the PUSCH, or the second PUSCH resource is used for transmission The time-frequency resource of the PUSCH and the DMRS corresponding to the PUSCH.
The terminal device according to any one of claims 61 to 73, wherein the number of resources of the first type in one resource period of the first message is the same as the number of resources of the second type Or different.
The terminal device according to any one of claims 61 to 74, wherein the processing unit is specifically configured to:

Among the resources of the first type and the resources of the second type, a resource type that can be used to transmit the first message earliest from the current moment is selected as the target resource type.
The terminal device according to any one of claims 61 to 75, wherein the transceiver unit is specifically configured to:

Among the multiple resources belonging to the target resource type, the resource with the best signal quality is selected to send the first message.
The terminal device according to any one of claims 61 to 76, wherein the first type of resource and the second type of resource in one resource period correspond to a first transmission window and a second transmission window, respectively , The transceiver unit is also used to:

If the first message is sent using the first-type resource, the second message in the 2-step random access is received in the first transmission window; and/or,

If the first message is sent using the second type resource, the second message is received in the second transmission window.
The terminal device according to claim 77, wherein the first transmission window and the second transmission window are used for the terminal device to blindly detect a physical downlink control channel PDCCH, and the PDCCH is used for scheduling and carrying the The physical downlink shared channel PDSCH of the second message.
The terminal device according to claim 77 or 78, wherein the time domain start positions of the second transmission window and the first transmission window are different.
The terminal device according to claim 79, wherein the time domain start position of the first transmission window is immediately adjacent to the time domain end position of the first type resource, and/or the time domain end position of the second transmission window The time domain start position is close to the time domain end position of the second type of resource.
The terminal device according to claim 79, wherein there is a time interval between the time domain start position of the first transmission window and the time domain end position of the first type of resource, and/or the There is a time interval between the time domain start position of the second transmission window and the time domain end position of the second type of resource.
The terminal device according to any one of claims 77 to 81, wherein the length of the second transmission window and the first transmission window are the same or different.
A network device, characterized by comprising:

The processing unit is used to configure the first type of resources;

The transceiver unit is configured to indicate the first-type resource to the terminal device;

Wherein, the first type of resource includes a first PUSCH resource and a first PRACH resource located after the first PUSCH resource, and the first PUSCH resource is used to transmit information in the first message in 2-step random access. PUSCH, the first PRACH resource is used to transmit the preamble in the first message.
The network device of claim 83, wherein there is a guard time between the first PUSCH resource and the first PRACH resource.
The network device according to claim 83 or 84, wherein the first PRACH resource is also used to transmit a cyclic prefix of the preamble, and the cyclic prefix is located before the preamble.
The network device according to any one of claims 83 to 85, wherein the first PUSCH resource and the first PRACH resource do not overlap, partially overlap, or completely overlap in the frequency domain.
The network device according to any one of claims 83 to 86, wherein the bandwidth of the first PUSCH resource and the first PRACH resource are the same or different.
The network device according to any one of claims 83 to 87, wherein:

The multiple first PUSCH resources correspond to multiple preambles one-to-one; and/or,

One said first PUSCH resource corresponds to multiple preambles; and/or,

One preamble corresponds to a plurality of the first PUSCH resources.
The network device according to any one of claims 83 to 88, wherein the first PUSCH resource is a time-frequency resource used for transmission of the PUSCH, or the first PUSCH resource is used for transmission The time-frequency resource of the PUSCH and the demodulation reference signal DMRS corresponding to the PUSCH.
The network device according to any one of claims 83 to 89, wherein the processing unit is further configured to: configure a second type of resource;

The transceiving unit is further configured to indicate the second-type resource to the terminal device;

Wherein, the second type resource includes a second PRACH resource and a second PUSCH resource located after the second PRACH resource, and the second PUSCH resource is used to transmit the PUSCH in the first message. The second PRACH resource is used to transmit the preamble in the first message.
The network device of claim 90, wherein the second type of resource is located before the first type of resource.
The network device according to claim 91, wherein the first PUSCH resource and the second PUSCH resource overlap in the time domain and/or the frequency domain.
The network device according to claim 90, wherein the first type of resource is located before the second type of resource.
The network device according to claim 93, wherein the first PRACH resource and the second PRACH resource overlap in the time domain and/or the frequency domain.
The network device according to any one of claims 90 to 94, wherein the time domain length of the first type resource and the second type resource are the same or different.
The network device according to any one of claims 90 to 95, wherein:

The multiple second PUSCH resources correspond to multiple preambles one-to-one; and/or,

One said second PUSCH resource corresponds to multiple preambles; and/or,

One preamble corresponds to multiple second PUSCH resources.
The network device according to any one of claims 90 to 96, wherein the second PUSCH resource is a time-frequency resource used for transmission of the PUSCH, or the second PUSCH resource is used for transmission The time-frequency resource of the PUSCH and the DMRS corresponding to the PUSCH.
The network device according to any one of claims 90 to 97, wherein the number of resources of the first type in one resource period of the first message is the same as the number of resources of the second type Or different.
The network device according to any one of claims 90 to 98, wherein the processing unit is further configured to:

Configure the first transmission window and the second transmission window;

Wherein, the transceiver unit is also used for:

If the first message sent by the terminal device is received on the first type of resource, sending the second message in the 2-step random access to the terminal device in the first transmission window; and / or,

If the first message sent by the terminal device is received on the second-type resource, the second message is sent to the terminal device in the second transmission window.
The network device according to claim 99, wherein the first transmission window and the second transmission window are used to send a physical downlink control channel PDCCH, and the PDCCH is used to schedule a carrier carrying the second message Physical downlink shared channel PDSCH.
The network device according to claim 99 or 100, wherein the time domain start positions of the second transmission window and the first transmission window are different.
The network device according to claim 101, wherein the time domain start position of the first transmission window is immediately adjacent to the time domain end position of the first type resource, and/or the time domain end position of the second transmission window The time domain start position is close to the time domain end position of the second type of resource.
The network device according to claim 101, wherein there is a time interval between the time domain start position of the first transmission window and the time domain end position of the first type of resource, and/or the There is a time interval between the time domain start position of the second transmission window and the time domain end position of the second type of resource.
The network device according to any one of claims 99 to 103, wherein the length of the second transmission window and the first transmission window are the same or different.
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 30 or the method according to any one of claims 9 to 30 is performed.
A network device, wherein 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 31 To the method of any one of 52.
A chip, characterized in that the chip includes a processor, the processor is used to call and run a computer program from the memory, so that the device installed with the chip executes any one of claims 1 to 8 Method or execution of the method of any one of claims 9 to 30.
A chip, characterized in that the chip includes a processor, the processor is used to call and run a computer program from the memory, so that the device installed with the chip executes any one of claims 31 to 52 method.
A computer-readable storage medium, characterized in that it is used to store a computer program that enables the computer to execute the method described in any one of claims 1 to 8 or execute the method described in any one of claims 9 to 30 The method described.
A computer-readable storage medium, characterized in that it is used to store a computer program that enables a computer to execute the method according to any one of claims 31 to 52.
A computer program product, characterized by comprising computer program instructions that cause a computer to execute the method described in any one of claims 1 to 8 or to execute the method described in any one of claims 9 to 30 method.
A computer program product, characterized by comprising computer program instructions that cause a computer to execute the method according to any one of claims 31 to 52.
A computer program, characterized in that the computer program causes the computer to execute the method according to any one of claims 1 to 8 or execute the method according to any one of claims 9 to 30.
A computer program, wherein the computer program causes a computer to execute the method according to any one of claims 31 to 52.
A communication system, characterized by comprising the terminal device according to any one of claims 53 to 60 and the network device according to any one of claims 83 to 104.
A communication system, characterized by comprising the terminal device according to any one of claims 61 to 82 and the network device according to any one of claims 83 to 104.