WO2021159401A1

WO2021159401A1 - Random access method and apparatus, and communication system

Info

Publication number: WO2021159401A1
Application number: PCT/CN2020/075114
Authority: WO
Inventors: 路杨; 蒋琴艳; 贾美艺; 张健
Original assignee: 富士通株式会社; 路杨; 蒋琴艳; 贾美艺; 张健
Priority date: 2020-02-13
Filing date: 2020-02-13
Publication date: 2021-08-19

Abstract

The present application provides a random access method and apparatus, and a communication system. The apparatus comprises a first processing unit. The first processing unit determines, according to a random access resource configuration of a terminal device, that a random access type is a first type or a second type, selects a random access resource according to the random access type, and sends an initial message of a random access on the selected random access resource, wherein the first type comprises a first contention based random access (CBRA) and a first contention-free random access (CFRA), and the second type comprises a second CBRA and a second CFRA.

Description

Random access method, device and communication system

Technical field

The embodiments of the present application relate to the field of wireless communication technology.

Background technique

The random access process is a very critical step in mobile communication technology.

Figure 1(a) is a flow chart of the existing four-step contention-based random access (CBRA, Contention-Based Random Access) process. As shown in Figure 1(a), in operation 101, the terminal device selects a CBRA preamble (preamble), and sends the preamble through Msg1 in a contention-based random access opportunity (RO, Random access Occasion) pre-configured by the system; In operation 102, after receiving the preamble, the network device sends Msg2. As a result, the random access response (RAR, Random Access Response) authorizes the terminal device sending the preamble to have a dedicated uplink PUSCH resource and allocates a temporary cell radio network temporary identifier ( CRNTI), indicating the uplink advance of the physical uplink shared channel (PUSCH); in operation 103, the terminal device sends Msg3 carrying signaling or data on the PUSCH resource; in operation 104, the network device sends a message for Msg3 to the terminal device The contention resolution signaling Msg4.

Figure 1(b) is a flow chart of the existing two-step contention-based random access (CBRA, Contention-Based Random Access) process. As shown in Figure 1(b), in operation 105, the terminal device sends MsgA. MsgA includes a random access preamble (preamble) and a data part (payload). The terminal device sends the preamble of MsgA in the competing RO and sends it in The MsgA signaling or service data is sent in the competing physical uplink shared channel (PUSCH) resources. In operation 106, the network device sends MsgB after receiving MsgA, thereby sending a random access response and a contention resolution message to the terminal device.

It should be noted that the above introduction to the technical background is only for the convenience of a clear and complete description of the technical solutions of the present application, and to facilitate the understanding of those skilled in the art. It should not be considered that the above technical solutions are well-known to those skilled in the art just because these solutions are described in the background art part of this application.

Summary of the invention

The inventor of the present application found that with the advancement of technology, the types of random access will continue to increase. When there are multiple types of random access in the communication standard, how to select the appropriate random access type to determine the appropriate random access Access to resources has become an urgent problem to be solved.

The embodiments of the present application provide a random access method, device, and communication system. The random access type is determined according to the random access resource configuration of the terminal device. The method can select the appropriate random access type to determine the appropriate random access resource.

According to the first aspect of the embodiments of the present application, a random access method is provided, which is applied to a terminal device, and the method includes:

Determine whether the random access type is the first type or the second type according to the random access resource configuration of the terminal device;

Selecting random access resources according to the random access type; and

Sending an initial message of random access on the selected random access resource,

Wherein, the first type includes a first contention random access (CBRA) and a first non-competition random access (CFRA), and the second type includes a second contention random access (CBRA) and a second non-competition random access (CFRA). Access (CFRA).

According to a second aspect of the embodiments of the present application, a random access method is provided, which is applied to a network device, and the method includes:

Configure random access resources for terminal equipment; and

Receive the initial message of random access on the random access resource.

According to a third aspect of the embodiments of the present application, there is provided a random access device, which is applied to a terminal device, and the device executes the random access method of the first aspect of the embodiments of the present application.

According to the fourth aspect of the embodiments of the present application, there is provided a random access device, which is applied to a network device, and the device executes the random access method of the second aspect of the embodiments of the present application.

According to the fifth aspect of the embodiments of the present application, there is provided a terminal device having the random access apparatus described in the third aspect of the embodiments of the present application.

According to the sixth aspect of the embodiments of the present application, there is provided a network device having the random access apparatus described in the fourth aspect of the embodiments of the present application.

According to a seventh aspect of the embodiments of the present application, a communication system is provided, which has the terminal device described in the fifth aspect of the embodiments of the present application and the network device described in the sixth aspect.

According to an eighth aspect of the embodiments of the present application, there is provided a computer-readable program, wherein when the program is executed in a random access apparatus or terminal device, the program causes the random access apparatus or terminal device to execute The random access method in the first aspect of the embodiments of the present application.

According to the ninth aspect of the embodiments of the present application, there is provided a storage medium storing a computer-readable program, wherein the computer-readable program enables a random access apparatus or terminal device to execute the first aspect of the embodiments of the present application Random access method.

According to a tenth aspect of the embodiments of the present application, there is provided a computer-readable program, wherein when the program is executed in a random access apparatus or network equipment, the program causes the random access apparatus or network equipment to execute The random access method described in the second aspect of the embodiments of the present application.

According to the eleventh aspect of the embodiments of the present application, there is provided a storage medium storing a computer-readable program, wherein the computer-readable program enables the random access apparatus or network device to execute the method described in the second aspect of the embodiments of the present application. The random access method described.

The beneficial effect of the embodiments of the present application is that the random access type is determined according to the random access resource configuration of the terminal device, and this method can select an appropriate random access type to determine an appropriate random access resource.

With reference to the following description and drawings, specific implementations of the present application are disclosed in detail, and the ways in which the principles of the present application can be adopted are indicated. It should be understood that the scope of the embodiments of the present application is not limited thereby. Within the scope of the terms of the appended claims, the implementation of the present application includes many changes, modifications and equivalents.

Features described and/or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or substituted for features in other embodiments .

It should be emphasized that the term "comprising/comprising" when used herein refers to the existence of a feature, a whole, a step or a component, but does not exclude the existence or addition of one or more other features, a whole, a step or a component.

Description of the drawings

The elements and features described in one drawing or one embodiment of the embodiment of the present application may be combined with the elements and features shown in one or more other drawings or embodiments. In addition, in the drawings, similar reference numerals indicate corresponding parts in several drawings, and may be used to indicate corresponding parts used in more than one embodiment.

The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to exemplify the embodiments of the present application, and together with the text description, explain the principle of the present application. Obviously, the drawings in the following description are only some embodiments of the application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor. In the attached picture:

Figure 1 (a) is a flow chart of the four-step contention-based random access process;

Figure 1(b) is a flow chart of the two-step contention-based random access process;

Figure 2 (a) is a flow chart of the non-contention random access process based on Msg1;

Figure 2(b) is a flow chart of the MsgA-based non-contention random access process;

Fig. 3 is a schematic diagram of a communication system according to an embodiment of the present application;

FIG. 4 is a schematic diagram of the random access method in the first aspect of the embodiments of the present application;

FIG. 5 is a schematic diagram of the random access method in the second aspect of the embodiments of the present application;

FIG. 6 is a schematic diagram of the random access device in the third aspect of the embodiments of the present application;

FIG. 7 is another schematic diagram of the random access device in the fourth aspect of the embodiments of the present application;

FIG. 8 is a schematic block diagram of the system configuration of the terminal device in the fifth aspect of the embodiments of the present application; FIG.

FIG. 9 is a schematic diagram of a structure of a network device in the sixth aspect of an embodiment of the present application.

Detailed ways

With reference to the drawings, the foregoing and other features of this application will become apparent through the following description. In the specification and drawings, specific implementations of the application are specifically disclosed, which indicate some implementations in which the principles of the application can be adopted. It should be understood that the application is not limited to the described implementations. On the contrary, the present application is not limited to the described implementations. The application includes all modifications, variations and equivalents falling within the scope of the appended claims. Various embodiments of the present application will be described below with reference to the accompanying drawings. These implementation manners are only exemplary, and not a limitation of the present application.

In the embodiments of this application, the terms "first", "second", etc. are used to distinguish different elements from the terms, but they do not indicate the spatial arrangement or chronological order of these elements. These elements should not be used by these terms. Limited. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having" and the like refer to the existence of the stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.

In the embodiments of this application, the singular forms "a", "the", etc. include plural forms, which should be broadly understood as "a" or "a type" rather than being limited to the meaning of "a"; in addition, the term "so" "Said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "based on" should be understood as "based at least in part on...", and the term "based on" should be understood as "based at least in part on...", unless the context clearly dictates otherwise.

In the embodiments of this application, the term "communication network" or "wireless communication network" can refer to a network that meets any of the following communication standards, such as Long Term Evolution (LTE), and Enhanced Long Term Evolution (LTE-A, LTE-A). Advanced), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), High-Speed Packet Access (HSPA, High-Speed Packet Access), etc.

In addition, the communication between devices in the communication system can be carried out according to any stage of communication protocol, for example, it can include but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and future 5G, New Radio (NR, New Radio), etc., and/or other communication protocols currently known or to be developed in the future.

In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device. Network equipment may include but not limited to the following equipment: base station (BS, Base Station), access point (AP, Access Point), transmission and reception point (TRP, Transmission Reception Point), broadcast transmitter, mobile management entity (MME, Mobile Management Entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller), etc.

Among them, the base station may include but is not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), 5G base station (gNB), etc., and may also include remote radio head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay), or low-power node (such as femto, pico, etc.). And the term "base station" can include some or all of their functions, and each base station can provide communication coverage for a specific geographic area. The term "cell" may refer to a base station and/or its coverage area, depending on the context in which the term is used.

In the embodiments of the present application, the term "User Equipment" (UE, User Equipment) or "Terminal Equipment" (TE, Terminal Equipment), for example, refers to equipment that accesses a communication network through a network device and receives network services. The user equipment may be fixed or mobile, and may also be called a mobile station (MS, Mobile Station), terminal, subscriber station (SS, Subscriber Station), access terminal (AT, Access Terminal), station, etc.

Among them, user equipment may include, but is not limited to, the following devices: Cellular Phone, Personal Digital Assistant (PDA, Personal Digital Assistant), wireless modem, wireless communication device, handheld device, machine-type communication device, laptop computer, Cordless phones, smart phones, smart watches, digital cameras, etc.

For another example, in scenarios such as the Internet of Things (IoT), user equipment may also be a machine or device that performs monitoring or measurement. For example, it may include but is not limited to: Machine Type Communication (MTC) terminals, In-vehicle communication terminals, device to device (D2D, Device to Device) terminals, machine to machine (M2M, Machine to Machine) terminals, etc.

In the embodiments of the present application, the non-contention free random access (CFRA) process and the MsgA-based non-contention random access (CFRA) process are involved. Fig. 2(a) is a flowchart of a non-contention random access process based on Msg1, and Fig. 2(b) is a flowchart of a non-contention random access process based on MsgA.

As shown in Figure 2(a), the non-contention random access process may include the following operations: Operation 201, the network device configures a dedicated preamble for the terminal device through a radio resource control (RRC) message or a physical downlink control channel (PDCCH) command (preamble), where a dedicated preamble can be configured on multiple synchronization signal blocks/channel state information (SSB/CSI); operation 202, the terminal device selects the SSB/CSI when initiating random access and sends the dedicated preamble through Mag1; Operation 203: After receiving the dedicated preamble, the network device sends a random access response to the terminal device through Msg2; Operation 204: The terminal device sends uplink data or signaling in the uplink authorization included in the random access response.

As shown in Figure 2(b), the MsgA-based non-contention random access process may include the following operations: Operation 205, the network device configures the terminal device through a radio resource control (RRC) message or a physical downlink control channel (PDCCH) command Dedicated MsgA random access preamble; operation 206, the terminal device selects SSB/CSI when initiating random access, and sends the dedicated preamble and physical uplink shared channel (PUSCH) through MagA; operation 207, the network device sends the terminal device through MsgB The device sends a random access response. In the MsgA-based non-contention random access process, the PUSCH and the dedicated preamble are sent in operation 206, so that the transmission delay of the PUSCH can be reduced.

In the embodiments of the present application, the dedicated MsgA random access preamble may also be referred to as the MsgA non-contention random access preamble, and the two have the same meaning.

The following uses examples to illustrate the scenarios of the embodiments of the present application, but the present application is not limited to this.

FIG. 3 is a schematic diagram of a communication system according to an embodiment of the present application, schematically illustrating a case where a terminal device and a network device are taken as an example. As shown in FIG. 3, the communication system 300 may include a network device 301 and a terminal device 302. For the sake of simplicity, Figure 3 only uses one terminal device as an example for illustration.

In the embodiment of the present application, the network device 301 and the terminal device 302 can perform existing services or services that can be implemented in the future. For example, these services include, but are not limited to: enhanced Mobile Broadband (eMBB), large-scale machine type communication (mMTC, massive Machine Type Communication), and high-reliability and low-latency communication (URLLC, Ultra-Reliable and Low- Latency Communication), etc.

Wherein, the terminal device 302 can send data to the network device 301, for example, using an unauthorized transmission method. The network device 301 can receive data sent by one or more terminal devices 302, and feedback information (such as correct ACK/negative acknowledgement NACK) information to the terminal device 202. The terminal device 302 can confirm the end of the transmission process according to the feedback information, or it can also New data transmission can be performed, or data retransmission can be performed.

The following takes the network device in the communication system as the receiving end or sending short, and the terminal device as the sending end or receiving end as examples, but the application is not limited to this, and the sending end and/or receiving end may also be other devices. . For example, this application is not only applicable to uplink unauthorized transmission between network equipment and terminal equipment, but also applicable to side link unauthorized transmission between two terminal equipment.

In the following embodiments of the present application, the first random access resource includes: a first contention random access resource and a first non-competition random access resource. Among them, the first contention random access resource is used for the four-step contention-based random access process shown in Figure 1(a); the first non-competition random access resource is used for the four-step contention-based random access process shown in Figure 2(a) Non-competitive random access process of Msg1.

In the following embodiments of the present application, the second random access resource includes: a second contention random access resource and a second non-competition random access resource. Among them, the second contention random access resource is used for the two-step contention-based random access process shown in Figure 1(b); the second non-competition random access resource is used for the two-step contention-based random access process shown in Figure 2(b). The non-competitive random access process of MsgA.

The first aspect of the embodiment

The first aspect of the embodiments of the present application relates to a random access method, which is applied to a terminal device, such as the terminal device 302.

FIG. 4 is a schematic diagram of the random access method in the first aspect of the embodiments of the present application. As shown in FIG. 4, the random access method may include:

Operation 401: Determine whether the random access type is the first type or the second type according to the random access resource configuration of the terminal device.

Operation 402: Select a random access resource according to the random access type; and

Operation 403: Send an initial random access message on the selected random access resource.

In the first aspect of this embodiment, the first type of random access type supports the first contention random access (CBRA) and first non-contention random access (CFRA) procedures, and the second type of random access type supports The second contention random access (CBRA) and the second non-contention random access (CFRA) procedures.

Among them, the initial message of the first type of random access process is Msg1, and the initial message of the second type of random access process is MSGA. MSGA includes a preamble on the physical random access channel (PRACH) and the physical uplink shared channel (PUSCH) on the payload. The first contention random access corresponds to the four-step contention-based random access (CBRA) process shown in Figure 1(a); the first non-contention random access (CFRA) corresponds to the four-step contention-based random access (CBRA) process shown in Figure 2(a) The Msg1-based non-competition random access (CFRA) process; the second contention random access corresponds to the two-step contention-based random access (CBRA) process shown in Figure 1(b); the second non-competition random access (CBRA) process The access corresponds to the MsgA-based non-contention random access (CFRA) procedure shown in (b) of FIG. 2.

In the first aspect of the embodiments of the present application, the random access type is determined according to the random access resource configuration of the terminal device, so that the appropriate random access type can be selected to determine the appropriate random access resource; and The method simplifies the selection process of the type of random access into a selection between two types, so that the method of random access can be simplified.

In at least one embodiment, in operation 401, it may be: in the case where only the second random access resource is configured on the bandwidth portion (BWP) selected by the terminal device for random access, the random access type is determined It is the second type; or, when only the first random access resource is configured on the bandwidth part (BWP) selected by the terminal device for random access, the random access type is determined to be the first type.

In at least one embodiment, in operation 401, it may also be determined that the random access type is the first type or the second type according to the configuration of the non-contention random access resource of the terminal device. For example, when the terminal device is configured with the first non-contention random access (CFRA) resource, it is determined that the random access type is the first type; for another example, the terminal device is configured with the second non-contention random access (CFRA) resource. In the case of CFRA) resources, it is determined that the random access type is the second type. Therefore, when the network device configures the terminal device with dedicated non-competitive random access resources or the terminal device performs non-competitive random access, the terminal device can select the corresponding random access type according to the dedicated access resource configuration. In this way, The waste of dedicated access resources is avoided, and the utilization rate of uplink resources is improved.

Wherein, the non-competitive random access resource includes a first non-competitive random access resource or a second non-competitive random access resource, and a bandwidth part (BWP) is not configured with the first non-competitive random access resource and The second non-competitive random access resource.

In at least one embodiment, the first non-contention random access resource includes at least: a non-contention random access (CFRA) preamble index related to one synchronization signal block (SSB). The second non-contention random access resource includes at least: a second non-contention random access (CFRA) preamble index related to one synchronization signal block (SSB). In addition, the first non-competitive random access resource and the second non-competitive random access resource may further include: a random access opportunity (PRACH occasion).

In at least one embodiment, the first non-contention random access (CFRA) resource or the second non-contention random access (CFRA) resource is configured by radio resource control (RRC) signaling. For example, when the terminal device determines that the first non-contention random access resource is configured by RRC signaling, the terminal device sets the random access type to the first type; or, the terminal device determines that the second non-contention resource is configured by RRC signaling. In the case of random access resources, the random access type is set to the second type.

In at least another embodiment, the first non-contention random access (CFRA) resource or the second non-contention random access (CFRA) resource is configured by a physical downlink control channel (PDCCH) command. For example, if the terminal device receives the PDCCH order and the first non-contention random access resource is configured in the PDCCH order (for example, the random access preamble index is not 0), then the terminal device sets the random access type to the first type; If the terminal device receives the PDCCH order and the first non-contention random access resource is configured in the PDCCH order, the terminal device sets the random access type to the second type.

In at least one embodiment, in operation 401, for random access procedures initiated by different reasons, the type of random access may also be set according to the random access resource configuration of the terminal device.

For example, when the random access process is initiated due to a system information request (SI request), and the terminal device is configured with the first non-competitive random access resource for the system information request, the random access type is determined It is the first type; or, when the random access process is initiated due to a system information request (SI request), and the terminal device is configured with the second non-competitive random access resource for the system information request, determine The random access type is the second type. Wherein, the terminal device is configured with the first non-competitive random access resource or the second non-competitive random access resource by the system information.

For another example, in the case where the random access process is initiated due to beam failure recovery (BFR), and the terminal device is configured with the first non-competitive random access resource for beam failure recovery, it is determined that the random access The type is the first type; or, when the random access process is initiated due to beam failure recovery, and the terminal device is configured with a second non-competitive random access resource for beam failure recovery, determine random access The type is the second type. Wherein, the terminal device is configured with dedicated RRC signaling to configure the first non-competitive random access resource or the second non-competitive random access resource.

In the following, five examples are used to illustrate the method of determining the random access type in operation 401.

Example 1.

The first embodiment illustrates an implementation manner in which the UE determines the random access type according to the random access resource configuration.

A variety of random access resources can be configured on a block part (BWP), including the first contention random access resource configuration, the second contention random access resource configuration, the first non-competition random access resource configuration, and the second non-competitive random access resource configuration. At least any one of competing random access resource configurations.

If only the second type of random access resource configuration is configured on the bandwidth part (BWP) selected by the terminal device for random access (the second type of random access resource configuration includes, for example: second competing random access resources) Configuration or second non-competitive random access resource configuration), the terminal device sets the random access type to the second type to facilitate the next step of random access resource selection.

If only the first type of random access resource configuration is configured on the bandwidth part (BWP) selected by the terminal device for random access (the first type of random access resource configuration includes, for example, the first competitive random access resource) Configuration or first non-competitive random access resource configuration), the terminal device sets the random access type to the first type to facilitate the next step of random access resource selection.

Example two,

In the case of handover, uplink resynchronization, or secondary cell (SCell) uplink synchronization, the network device will send a dedicated RRC message to enable the terminal to initiate random access (for example, competitive or non-competitive random access) ), the terminal device initiates the random access process when the non-competitive random access resource is configured by the dedicated RRC message of the network device. In order not to waste the non-competitive random access resource, the terminal device determines the random access process according to the type of the non-competitive random access resource. Access type.

For example, if the terminal device is configured with the first non-competitive random access resource by the dedicated RRC message of the network device, in the case of performing SCell uplink synchronization during handover, uplink resynchronization, or adding SCell, the terminal device sets the random access type to The first type; for another example, if the terminal device determines that the second non-contention random access resource is configured by RRC signaling, in the case of handover, for example, the terminal device sets the random access type to the second type.

In the second example, the first non-competitive random access resource configuration or the second non-competitive random access resource configuration in the above-mentioned dedicated RRC signaling configuration includes at least a synchronization signal block (SSB) or a channel state information reference signal (CSI- RS) related non-competitive random access resources, including random access preamble index, may also include random access opportunity (PRACH occasion) configuration.

Example three

When the downlink data arrives at the network device but the terminal device is in an uplink out-of-synchronization state, the network device will send a PDCCH command to enable the terminal to initiate random access (competitive or non-competitive random access), if non-competitive random access is configured in the PDCCH command For resources, the terminal initiates non-competitive random access. In order not to waste non-competitive random access resources, the terminal device determines the random access type according to the type of non-competitive random access resources.

For example, if the terminal device receives the PDCCH order and the first non-contention random access resource is configured in the PDCCH order (that is, the random access preamble index is not 0), the terminal device sets the random access type to the first type. For another example, if the terminal device receives the PDCCH order and the second non-competitive random access resource is configured in the PDCCH order, the terminal device sets the random access type to the second type.

In particular, in some cases, the PDCCH command only supports the configuration of the first non-competitive random access resource, that is, only the first non-competitive random access resource can be initiated. Therefore, if the terminal device receives the PDCCH command and the PDCCH command is configured In order to obtain the first non-competitive random access resource, the terminal device sets the random access type to the first type.

The first non-competitive random access resource configuration or the first non-competitive random access resource configuration in the aforementioned PDCCH order includes at least a non-competitive random access resource related to one SSB, and the non-competitive random access resource includes a random access preamble The code index (not 0) may also include the configuration of a random access opportunity (PRACH occasion).

Example four

Example 4 illustrates the implementation manner in which the terminal device determines the random access type according to the random access resource configuration and the reason for initiating the random access.

When a terminal device requests a network device to send unbroadcast system information, it will initiate random access. The terminal device may have configured non-competitive random access resources for system information requests (SI request) by receiving the system information of the network device. The non-competitive random access resource is wasted, and the terminal device determines the random access type according to the type of the non-competitive random access resource.

For example, if the random access process is initiated due to a system information request and the terminal device is configured with the system information as the first non-competitive random access resource for the system information request (SI request), the terminal device sets the random access type to The first type. For another example, if the random access process is initiated due to a system information request and the terminal device is configured with the system information as the second non-competitive random access resource resource for the system information request (SI request), the terminal device sets random access The type is the second type.

Particularly, in some cases, if the network device only supports the configuration of the first non-competitive random access resource for the system information request (SI request), the random access process is initiated due to the system information request and the terminal device is When the system information is configured with the first non-competitive random access resource used for the system information request (SI request), the terminal device sets the random access type to the first type.

Example 5

Example 5 illustrates the implementation manner in which the terminal device determines the random access type according to the random access resource configuration and the reason for initiating the random access.

When the terminal device detects a beam failure, it initiates random access. At this time, the terminal device may have configured non-competitive random access resources for beam failure recovery (BFR, Beam Failure Recovery) through dedicated RRC signaling. Competing for random access resources, the terminal equipment determines the random access type according to the type of non-competing random access resources.

For example, if the random access process is initiated due to BFR and the terminal device is configured with the first non-competitive random access resource for BFR by dedicated RRC signaling, the terminal device sets the random access type to the first type. For another example, if the random access process is initiated due to BFR and the terminal device is configured with a second non-competitive random access resource for BFR by dedicated RRC signaling, the terminal device sets the random access type to the second type.

In particular, in some cases, if the network device only supports configuring the first non-contention random access resource for the BFR, the random access process is initiated due to the BFR and the terminal device is configured for dedicated RRC signaling. In the case of the first non-competitive random access resource of the BFR, the terminal device sets the random access type to the first type.

In at least one embodiment, as shown in FIG. 4, the random access method further includes:

Operation 404: Determine whether the random access type is the first type or the second type according to the received power of the downlink reference signal measured by the terminal device.

For example, when the terminal device is not configured with the first non-competitive random access resource and the second non-competitive random access resource, or when the terminal device does not initiate the first non-competitive random access or the second non-competitive random access In the case of, operation 404 may be performed. As a result, it is possible to increase the possibility of selecting the first non-contention random access or the second non-contention random access.

Operation 404 may be performed before operation 402.

In operation 404, when the received power of the downlink reference signal measured by the terminal device is higher than the first threshold, the random access type is determined to be the second type; otherwise, the random access type is determined to be the first type.

For example, in the case where the bandwidth part (BWP) of the terminal device for random access is configured with two-step random access resources, and the measured downlink reference signal received power is higher than the first threshold, the terminal device determines that the random access type is the first The second type; otherwise, the terminal device determines that the random access type is the first type. Among them, the two-step random access resource includes: a second competitive random access resource or a second non-competitive random access resource.

In operation 404, when the terminal device selects an additional uplink (SUL) carrier for random access, the first threshold is the first threshold of the additional uplink; when the terminal device selects a normal uplink (NUL) carrier for random access During random access, the first threshold is the first threshold of a normal uplink.

In at least one embodiment, the first threshold is a synchronization signal block (SSB)-based measurement threshold parameter configured by radio resource control (RRC) signaling, for example, the first threshold is rsrp-ThresholdSSB-2stepRA.

In at least one embodiment, in operation 402, a random access resource is selected according to the random access type determined in operation 401 or operation 404.

In the following, firstly, the selection of random access resources when the random access type is the first type is described.

In operation 402, when the random access type is the first type, random access resource selection is performed, including: determining a beam for transmitting the first information (msg1), a preamble, and a physical random access channel opportunity (PRACH occasion).

For example, determining the beam and preamble for sending the first message (msg1) includes:

When the terminal device receives a physical downlink control channel (PDCCH) command and the preamble index configured in the physical downlink control channel command is not 0, the random access preamble of the first information (msg1) to be sent The index of the code is set as the configured random access preamble index, and the configured synchronization signal block (SSB) is selected as the synchronization signal block (SSB) for transmitting the first information (msg1).

For another example, determining the beam and preamble for sending the first information (msg1) includes:

Operation S11: In the case where the random access process is initiated due to a system information request (SI request), and the terminal device is configured with the first non-competitive random access resource for the system information request, if at least one If the measured value of the synchronization signal block reference signal received power (SSB-RSRP) of the synchronization signal block (SSB) is higher than the synchronization signal block (SSB) selection threshold configured by the network device, then one of the at least one synchronization signal block is selected for synchronization Signal block, otherwise, select any sync signal block; and

Operation S12: Set a random access preamble according to the preamble corresponding to the selected synchronization signal block (SSB).

In operation S11, any synchronization signal block is not particularly limited. For example, any synchronization signal block may be: the synchronization signal block with the highest received power, or other synchronization signal blocks.

Operation S21, in the case that the terminal device is configured with the first non-competitive random access resource by dedicated RRC signaling, if the synchronization signal block reference signal received power (SSB-RSRP) of at least one synchronization signal block (SSB) configured by the network device If the measured received power of) is higher than the configured synchronization signal block (SSB) selection threshold, then one of the at least one synchronization signal block is selected; and

Operation S22: Set a random access preamble according to the preamble corresponding to the selected synchronization signal block (SSB).

In operation S21, if the terminal device selects one SSB, then in operation S22, the terminal device selects the first non-contention random access as the random access method.

In addition, in operation S21, if the synchronization signal block reference signal received power (SSB-RSRP) measured received power of the synchronization signal block (SSB) configured by the network device is not higher than the configured synchronization signal block (SSB) selection threshold, The terminal device selects any synchronization signal block; subsequently, in operation S22, the terminal device selects a preamble and a physical random access channel opportunity (PRACH occasion) on the first competing random access resource configured by the system information. Therefore, the terminal device selects the first competitive random access as the random access method.

The present application does not specifically limit any synchronization signal block. For example, any synchronization signal block may be: a synchronization signal block with the highest received power configured by a network device, or other synchronization signal blocks.

Operation S31, in the case where the terminal device is configured with the first non-competitive random access resource by dedicated RRC signaling, if the received power of the channel state information reference signal (CSI-RS) of at least one channel state information reference signal (CSI-RS) configured by the network device If the measured received power of the (CSI-RSRP) is higher than the configured channel state information reference signal (CSI-RS) selection threshold, then one of the at least one channel state information reference signal (CSI-RS) is selected (CSI-RS); and

Operation S32, setting a random access preamble according to the preamble corresponding to the selected channel state information reference signal (CSI-RS).

In operation S31, if the terminal device selects one CSI-RS, then in operation S32, the terminal device selects the first non-contention random access as the random access method.

In addition, in operation S31, if the channel state information reference signal (CSI-RS) configured by the network device and the channel state information reference signal received power (CSI-RSRP) measured received power is not higher than the configured channel state information reference signal (CSI-RS) selection threshold, the terminal device selects any channel state information reference signal (CSI-RS); then, in operation S32, the terminal device selects the preamble ( preamble) and physical random access channel opportunity (PRACH occasion). Therefore, the terminal device selects the first competitive random access as the random access method.

Among them, this application does not specifically limit any channel state information reference signal (CSI-RS). For example, any channel state information reference signal (CSI-RS) may be: the network device configured with the highest measured received power Channel state information reference signal (CSI-RS), or other synchronization signal blocks.

S41. In the case that the random access process is initiated due to beam failure recovery (BFR, Beam Failure Recovery), and the terminal device is configured with the first non-competitive random access resource for beam failure recovery, if the network device If the measured received power of the configured reference signal block reference signal received power (SSB-RSRP) of at least one candidate synchronization signal block (SSB) is higher than the configured synchronization signal block (SSB) selection threshold, the at least one candidate synchronization signal block is selected A synchronization signal block in; and

S42. Set a random access preamble according to the preamble corresponding to the selected synchronization signal block (SSB).

In operation S41, if the terminal device selects one SSB, then in operation S42, the terminal device selects the first non-contention random access as the random access method.

In addition, in operation S41, if the synchronization signal block reference signal received power (SSB-RSRP) measured received power of the synchronization signal block (SSB) configured by the network device is not higher than the configured synchronization signal block (SSB) selection threshold, The terminal device selects any synchronization signal block; subsequently, in operation S42, the terminal device selects a preamble and a physical random access channel opportunity (PRACH occasion) on the first competing random access resource configured by the system information. Therefore, the terminal device selects the first competitive random access as the random access method.

S51. In the case that the random access process is initiated due to beam failure recovery, and the terminal device is configured with the first non-competitive random access resource for beam failure recovery (BFR, Beam Failure Recovery), if the network device The measured received power of the channel state information reference signal received power (CSI-RSRP) of the configured at least one candidate channel state information reference signal (CSI-RS) is higher than the configured channel state information reference signal (CSI-RS) selection threshold, then Selecting one channel state information reference signal (CSI-RS) among the at least one candidate channel state information reference signal (CSI-RS); and

S52. Set a random access preamble according to the preamble corresponding to the selected channel state information reference signal (CSI-RS).

In operation S51, if the terminal device selects one CSI-RS, then in operation S52, the terminal device selects the first non-contention random access as the random access method.

In addition, in operation S51, if the channel state information reference signal (CSI-RS) configured by the network device and the channel state information reference signal received power (CSI-RSRP) measured received power is not higher than the configured channel state information reference signal (CSI-RS) selection threshold, the terminal device selects any channel state information reference signal (CSI-RS); then, in operation S52, the terminal device selects the preamble ( preamble) and physical random access channel opportunity (PRACH occasion). Therefore, the terminal device selects the first competitive random access as the random access method.

In the following, when the random access type is the second type, random access resource selection will be described.

When the random access type is the second type, random access resource selection includes: determining the beam for sending the second information (msgA), preamble, physical random access channel opportunity (PRACH occasion), and Physical uplink shared channel (PUSCH) uplink grant.

For example, determining the beam and preamble for sending the second message (msgA) includes:

When the terminal device receives the physical downlink control channel (PDCCH) command and the preamble index configured in the physical downlink control channel command is not 0, the random access preamble of the second information (msgA) to be sent The index is set as the configured random access preamble index, and the configured synchronization signal block (SSB) is selected as the synchronization signal block (SSB) for sending the second information (msgA).

For another example, determining the beam and preamble for sending the second information (msgA) includes:

Operation S61: In the case where the random access process is initiated due to a system information request (SI request), and the terminal device is configured with a second non-competitive random access resource for the system information request, if at least one If the measured value of the synchronization signal block reference signal received power (SSB-RSRP) of the synchronization signal block (SSB) is higher than the synchronization signal block (SSB) selection threshold configured by the network device, then one of the at least one synchronization signal block is selected for synchronization Signal block, otherwise, select any sync signal block; and

Operation S62: Set a random access preamble according to the preamble corresponding to the selected synchronization signal block (SSB).

Wherein, in operation S61, any synchronization signal block is not particularly limited. For example, any synchronization signal block may be: the synchronization signal block with the highest received power, or other synchronization signal blocks.

Operation S81, in the case where the terminal device is configured with the second non-competitive random access resource by dedicated RRC signaling, if the synchronization signal block reference signal received power (SSB-RSRP) of at least one synchronization signal block (SSB) configured by the network device If the measured received power of) is higher than the configured synchronization signal block (SSB) selection threshold, then one of the at least one synchronization signal block is selected; and

Operation S82: Set a random access preamble according to the preamble corresponding to the selected synchronization signal block (SSB).

In operation S81, if the terminal device selects one SSB, then in operation S82, the terminal device selects the second non-contention random access as the random access method.

In addition, in operation S81, if the synchronization signal block reference signal received power (SSB-RSRP) measurement received power of the synchronization signal block (SSB) configured by the network device is not higher than the configured synchronization signal block (SSB) selection threshold, The terminal device selects any synchronization signal block; subsequently, in operation S82, the terminal device selects a preamble and a physical random access channel opportunity (PRACH occasion) on the second competing random access resource configured by the system information. Therefore, the terminal device selects the second contention random access as the random access method.

Operation S91: In the case that the terminal device is configured with the second non-competitive random access resource by dedicated RRC signaling, if the received power of the channel state information reference signal (CSI-RS) of at least one channel state information reference signal (CSI-RS) configured by the network device If the measured received power of (CSI-RSRP) is higher than the configured channel state information reference signal (CSI-RS) selection threshold, then one channel state information reference signal (CSI-RS) in the at least one channel state information reference signal (CSI-RS) is selected ( CSI-RS); and

Operation S92: Set a random access preamble according to the preamble corresponding to the selected channel state information reference signal (CSI-RS).

In operation S91, if the terminal device selects one CSI-RS, then in operation S92, the terminal device selects the second non-contention random access as the random access method.

In addition, in operation S91, if the channel state information reference signal (CSI-RS) configured by the network device and the channel state information reference signal received power (CSI-RSRP) measured received power is not higher than the configured channel state information reference signal (CSI-RS) selection threshold, the terminal device selects any channel state information reference signal (CSI-RS); then, in operation S92, the terminal device selects the preamble ( preamble) and physical random access channel opportunity (PRACH occasion). Therefore, the terminal device selects the second contention random access as the random access method.

S101. In the case that the random access process is initiated due to beam failure recovery (BFR, Beam Failure Recovery), and the terminal device is configured with a second non-competitive random access resource for beam failure recovery, if the network device If the measured received power of the configured reference signal block reference signal received power (SSB-RSRP) of at least one candidate synchronization signal block (SSB) is higher than the configured synchronization signal block (SSB) selection threshold, the at least one candidate synchronization signal block is selected A synchronization signal block in; and

S102. Set a random access preamble according to the preamble corresponding to the selected synchronization signal block (SSB).

In operation S101, if the terminal device selects one SSB, then in operation S102, the terminal device selects the second non-contention random access as the random access method.

In addition, in operation S101, if the synchronization signal block reference signal received power (SSB-RSRP) measured received power of the synchronization signal block (SSB) configured by the network device is not higher than the configured synchronization signal block (SSB) selection threshold, The terminal device selects any synchronization signal block; subsequently, in operation S102, the terminal device selects a preamble and a physical random access channel opportunity (PRACH occasion) on the first competing random access resource configured by the system information. Therefore, the terminal device selects the second contention random access as the random access method.

S111. In the case where the random access process is initiated due to beam failure recovery, and the terminal device is configured with the second non-competitive random access resource for beam failure recovery (BFR, Beam Failure Recovery), if the network device The measured received power of the channel state information reference signal received power (CSI-RSRP) of the configured at least one candidate channel state information reference signal (CSI-RS) is higher than the configured channel state information reference signal (CSI-RS) selection threshold, then Selecting one channel state information reference signal (CSI-RS) among the at least one candidate channel state information reference signal (CSI-RS); and

S112. Set a random access preamble according to the preamble corresponding to the selected channel state information reference signal (CSI-RS).

In operation S111, if the terminal device selects one CSI-RS, then in operation S112, the terminal device selects the second non-contention random access as the random access method.

In addition, in operation S111, if the channel state information reference signal (CSI-RS) configured by the network device and the channel state information reference signal received power (CSI-RSRP) measured received power are not higher than the configured channel state information reference signal (CSI-RS) selection threshold, the terminal device selects any channel state information reference signal (CSI-RS); then, in operation S112, the terminal device selects the preamble ( Preamble) and physical random access channel opportunity (PRACH occasion. Therefore, the terminal device selects the second competitive random access as the random access method.

In the case where the random access type is the second type, determining the uplink grant of the PUSCH of the second information (msgA) includes:

Determine the uplink grant of the physical uplink shared channel (PUSCH) resource associated with the preamble of the selected second information (msgA) and the physical random access channel opportunity (PRACH occasion), where the uplink grant of the PUSCH includes Physical uplink shared channel opportunity (PUSCH occasion), modulation and coding method, and PUSCH demodulation reference signal (DMRS), etc.

Among them, K consecutive second information (msgA) preambles are a group of preambles mapped to an available physical uplink shared channel opportunity, where K is an integer greater than or equal to 1.

For example, K=ceil(Npreamble/Npusch), where Npreamble is the second information ( msgA) The total number of random access channel preambles, Npusch is the total number of physical uplink shared channel opportunities (PUSCH occasion) in the synchronization signal block (SSB) and physical random access channel opportunity mapping period k1 and one physical uplink shared channel opportunity ( The product of the demodulation reference signal (DMRS) index number n1 in PUSCH occasion). The maximum value of K is 64, for example. ceil means round up.

In at least one embodiment, the foregoing mapping relationship can be obtained through the following operations:

Operation 121: Sort the second information (msgA) preamble in the available surface physical random access channel opportunity (PRACH occasion) of a time slot (slot) in a first order, where the second information (msgA) preamble The code includes: the second information (msgA) preamble of the second contention random access, and the second information (msgA) preamble of the second non-contention random access;

Operation 122: Map the second information (msgA) preamble ordered in the first order to the physical uplink shared channel opportunity (PUSCH occasion) in the second order.

In operation 121, the second information (msgA) preamble in the available physical random access channel opportunity (PRACH occasion) of a time slot is sorted in a first order, including:

The second information (msgA) preamble is sorted according to the first predetermined order of the preamble index (Preamble Index) within a physical random access channel opportunity, where the first predetermined order is, for example, the order of the preamble index from low to high And, within the physical random access channel opportunities multiplexed in the frequency domain, sort according to a second predetermined order of the frequency domain resource index of the physical random access channel opportunity, where the second predetermined order is, for example, the frequency domain resource index Low to high order; and, within a time-domain multiplexed physical random access channel opportunity in a time slot, the physical random access channel opportunity is sorted according to the third predetermined order of the time resource index of the physical random access channel opportunity, wherein the third predetermined The order is, for example, the order of the time resource index from low to high.

In operation 122, the second information (msgA) preamble sorted in the first order is mapped to the physical uplink shared channel opportunity (PUSCH occasion) in the second order, including:

For a physical uplink shared channel opportunity multiplexed in the frequency domain, the physical uplink shared channel opportunity is _{mapped to the physical uplink shared channel opportunity according to the fourth predetermined order of the frequency domain resource index f id} of the physical uplink shared channel opportunity, where the fourth predetermined order is, for example, frequency The domain resource index is in descending order; and, in a physical uplink shared channel opportunity, _{the fifth predetermined sequence of the demodulation reference signal (DMRS) index DMRS id} is mapped to the physical uplink shared channel opportunity, where the fifth The predetermined sequence is, for example, the sequence of the demodulation reference signal (DMRS) index from low to high; and, for the physical uplink shared channel opportunity time-domain multiplexed in a slot, the time resources of the physical uplink shared channel opportunity The sixth predetermined order of the index t _id is mapped to the physical uplink shared channel opportunity, where the sixth predetermined order is, for example, the order of time resource index from low to high; and according to the slot index of the physical uplink shared channel opportunity The seventh predetermined order of is mapped to the physical uplink shared channel opportunity, where the seventh predetermined order is, for example, the order of the timeslot index from low to high.

In at least one embodiment, the terminal device may be configured with a first physical uplink shared channel (PUSCH) uplink grant configuration and a second physical uplink shared channel (PUSCH) uplink grant configuration for the second non-contention random access (CFRA) . When the random access type is the second type, when determining the physical uplink shared channel (PUSCH) associated with the preamble of the selected second information (msgA) and the physical random access channel opportunity (PRACH occasion) ) In the operation of resource uplink grant, the first PUSCH uplink grant configuration or the second PUSCH uplink grant configuration can be determined according to the size of the payload data of the potential second message (MsgA). For example, if the size of the payload data of the potential second message (MsgA) is greater than the transport block (TB) size based on the first PUSCH uplink grant configuration, it is determined to use the second PUSCH uplink grant configuration.

By configuring the first PUSCH uplink grant configuration and the second PUSCH uplink grant configuration, the two PUSCH uplink grant configurations can adapt to different payload data sizes in the terminal equipment in the connected state.

In addition, in order to avoid reorganizing msgA during the handover of the second CFRA and the second CBRA, the PUSCH configuration of the second CFRA and the second CBRA need to be consistent, that is, the transmission block size based on the first PUSCH uplink grant configuration is the same as that of the second CBRA. The transmission block size of the PUSCH uplink grant configuration based on the second contention random access associated with preamble group A is the same; the transmission block size based on the second PUSCH uplink grant configuration is the same as the transmission block size based on the second contention random access associated with preamble group B The transmission block size of the incoming PUSCH uplink grant configuration is the same.

Through operation 402, a resource for random access can be selected.

In operation 403, an initial message of random access is sent on the random access resource selected in operation 402.

In addition, in the case where the random access process is not successfully completed, the random access type selected in operation 401 or operation 404 is kept unchanged, and the random access resource selection in operation 402 is performed again. Thus, the selection process of random access resources can be simplified.

In the first aspect of the embodiments of the present application, the terminal device can select an appropriate random access type to determine appropriate random access resources, thereby improving the efficiency of random access; in addition, when the network device configures the terminal device with a dedicated When the non-competitive random access resource or the terminal device performs non-competitive random access, the terminal device can select the corresponding random access type according to the dedicated access resource configuration. In this way, the waste of dedicated access resources is avoided and the uplink is improved. Resource utilization.

The second aspect of the embodiment

The second aspect of the embodiments of the present application relates to a random access method, which is applied to a network device, such as the network device 301.

FIG. 5 is a schematic diagram of the random access method in the second aspect of the embodiments of the present application. As shown in FIG. 5, the random access method may include:

Operation 501: Perform random access resource configuration on a terminal device; and

Operation 502: Receive an initial message of random access on the random access resource.

In the second aspect of the embodiments of the present application, the network device configures the random access resource for the terminal device. As a result, the terminal device can select an appropriate random access type and then determine an appropriate random access resource, thereby improving random access s efficiency.

In operation 501, performing random access resource configuration on a terminal device, for example, includes: configuring a first random access resource and/or a second random access resource on a bandwidth part (BWP). Wherein, the first random access resource includes: a first competitive random access resource or a first non-competitive random access resource. The second random access resource includes: a second competitive random access resource or a second non-competitive random access resource.

In operation 501, performing random access resource configuration on a terminal device also includes, for example, performing non-competitive random access resource configuration on the terminal device, where the non-competitive random access resource includes the first non-competitive random access resource or the first non-competitive random access resource. 2. Non-competitive random access resources.

In at least one embodiment, the first non-contention random access (CFRA) resource or the second non-contention random access (CFRA) resource is configured by radio resource control (RRC) signaling. Wherein, the first non-contention random access resource configured by RRC signaling includes: a first non-contention random access preamble index related to a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS). In addition, the first non-contention random access resource also includes a physical random access channel opportunity (PRACH occasion). The second non-contention random access resource configured by RRC signaling includes: a second non-contention random access preamble index related to a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS). In addition, the second non-contention random access resource also includes a physical random access channel opportunity (PRACH occasion).

In at least one embodiment, the first non-contention random access (CFRA) resource or the second non-contention random access (CFRA) resource may be configured by a physical downlink control channel (PDCCH) command. Wherein, the first non-contention random access resource configured by the PDCCH command includes at least: a first non-contention random access (CFRA) preamble index related to a synchronization signal block (SSB), and the preamble index is not zero. In addition, the first non-contention random access resource also includes a physical random access channel opportunity (PRACH occasion). The second non-contention random access resource configured by the PDCCH order includes at least: a second non-contention random access (CFRA) preamble index related to one synchronization signal block (SSB). In addition, the second non-contention random access resource also includes a physical random access channel opportunity (PRACH occasion).

In operation 501, configuring a random access resource for a terminal device also includes, for example, configuring a first non-competitive random access resource or a second non-competitive random access resource for a system information request (SI request) to the terminal device. . Wherein, for example, the first non-competitive random access resource or the second non-competitive random access resource used for the system information request (SI request) is configured by the system information.

In operation 501, performing random access resource configuration on the terminal device, for example, also includes: configuring the terminal device with a first non-competitive random access resource or a second non-competitive random access resource for beam failure recovery (BFR, Beam Failure Recovery) Access resources. Wherein, for example, dedicated RRC signaling is used to configure the first non-competitive random access resource or the second non-competitive random access resource for beam failure recovery (BFR, Beam Failure Recovery).

In this application, the network equipment configures the terminal equipment with dedicated non-competitive random access resources. Therefore, the terminal equipment can select the corresponding random access type according to the dedicated access resource configuration. In this way, dedicated access resources are avoided. The waste of time improves the utilization of uplink resources.

In operation 501, the network device may also configure the first competing random access resource or the second competing random access resource to the terminal device. For example, the network device may configure the first competing random access resource or the second competing random access resource through the system information.

In at least one embodiment, as shown in FIG. 5, the random access method further includes:

Operation 503: Send a first threshold to the terminal device, where the first threshold is used by the terminal device to determine whether the random access type is the first type or the second type.

In operation 503, the first threshold includes a first threshold of an additional uplink (SUL), or a first threshold of a normal uplink (NUL).

Through operation 503, the terminal device 302 is configured with a first threshold. Therefore, the terminal device 302 can determine whether the random access type is the first type or the second type according to the downlink reference signal received power measured by the terminal device 302. For example, when the terminal device is not configured with the first non-contention random access resource and the second non-competition random access resource, or the terminal device is not initiated the first non-competition random access or the second non-competition random access resource. In the case of access, operation 404 may be performed. As a result, it is possible to increase the possibility of selecting the first non-contention random access or the second non-contention random access.

In the second aspect of the embodiments of the present application, the network device configures the random access resource for the terminal device. As a result, the terminal device can select an appropriate random access type and then determine an appropriate random access resource, thereby improving random access In addition, the network equipment configures dedicated non-competitive random access resources for the terminal equipment, thus, the terminal equipment can select the corresponding random access type according to the dedicated access resource configuration, thus avoiding dedicated access resources The waste of time improves the utilization of uplink resources.

The third aspect of the embodiment

The third aspect of the embodiments of the present application provides a random access device, which is applied to a terminal device, for example, the terminal device 302.

FIG. 6 is a schematic diagram of the random access apparatus in the third aspect of the embodiments of the present application. As shown in FIG. 6, the random access apparatus 600 includes a first processing unit 601.

The first processing unit 601 may implement the random access method described in the first aspect of the embodiments of the present application. For the description of the random access method implemented by the first processing unit 601, reference may be made to the description of the random access method in the first aspect of the embodiments of the present application.

Fourth aspect of the embodiment

The fourth aspect of the embodiments of the present application provides a random access device, which is applied to a network device, for example, the network device 301.

FIG. 7 is a schematic diagram of the random access apparatus in the sixth aspect of the embodiments of the present application. As shown in FIG. 7, the random access apparatus 700 includes a second processing unit 701.

The second processing unit 701 may implement the random access method described in the second aspect of the embodiments of the present application. For the description of the random access method implemented by the second processing unit 701, reference may be made to the description of the random access method in the second aspect of the embodiments of the present application.

Fifth aspect of the embodiment

A fifth aspect of the embodiments of the present application provides a terminal device, and the terminal device includes the random access apparatus 600 described in the third aspect of the embodiment.

FIG. 8 is a schematic block diagram of the system configuration of the terminal device 800 in the seventh aspect of the embodiments of the present application. As shown in FIG. 8, the terminal device 800 may include a processor 810 and a memory 820; the memory 820 is coupled to the processor 810. It is worth noting that this figure is exemplary; other types of structures can also be used to supplement or replace this structure to implement telecommunication functions or other functions.

In an embodiment, the function of the random access apparatus 600 may be integrated into the processor 810. Wherein, the processor 810 may be configured to be able to implement the random access method of the first aspect of the embodiment.

In another embodiment, the random access device 600 can be configured separately from the processor 810. For example, the random access device 600 can be configured as a chip connected to the processor 810, and the random access device can be realized by the control of the processor 810. 600 features.

As shown in FIG. 8, the terminal device 800 may further include: a communication module 830, an input unit 840, a display 850, and a power supply 860. It is worth noting that the terminal device 800 does not necessarily include all the components shown in FIG. 8; in addition, the terminal device 800 may also include components not shown in FIG. 8, and the prior art can be referred to.

As shown in FIG. 8, the processor 810 is sometimes called a controller or an operating control, and may include a microprocessor or other processor device and/or logic device. The processor 810 receives input and controls the operation of the various components of the terminal device 800. operate.

Wherein, the memory 820 may be, for example, one or more of a cache, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable devices. Various data can be stored, in addition to the program that executes related information. And the processor 810 can execute the program stored in the memory 820 to implement information storage or processing. The functions of other components are similar to the existing ones, so I won't repeat them here. Each component of the terminal device 800 can be implemented by dedicated hardware, firmware, software, or a combination thereof, without departing from the scope of the present application.

Sixth aspect of the embodiment

The sixth aspect of the embodiments of the present application provides a network device, and the network device includes the random access apparatus 700 described in the fourth aspect of the embodiments.

Fig. 9 is a schematic diagram of a structure of a network device according to an embodiment of the present application. As shown in FIG. 9, the network device 900 may include: a processor (processor) 910 and a memory 920; the memory 920 is coupled to the processor 910. The memory 920 can store various data; in addition, it also stores an information processing program 930, and the program 930 is executed under the control of the processor 910 to receive various information sent by the user equipment and send request information to the user equipment.

In an embodiment, the function of the random access apparatus 700 may be integrated into the processor 910. The processor 910 may be configured to implement the random access method described in the second aspect of the embodiments of the present application.

In another embodiment, the random access device 700 can be configured separately from the processor 910. For example, the random access device 700 can be configured as a chip connected to the processor 910, and the random access device can be realized by the control of the processor 910. 700 features.

In addition, as shown in FIG. 9, the network device 900 may further include: a transceiver 940 and an antenna 950, etc.; wherein the functions of the above-mentioned components are similar to those of the prior art, and will not be repeated here. It should be noted that the network device 900 does not necessarily include all the components shown in FIG. 9; in addition, the network device 900 may also include components not shown in FIG. 9, and the prior art can be referred to.

Seventh aspect of the embodiment

The ninth aspect of the embodiments of the present application also provides a communication system, including the network device described in the sixth aspect of the embodiment and the terminal device described in the fifth aspect of the embodiment.

The above devices and methods of this application can be implemented by hardware, or can be implemented by hardware combined with software. This application relates to such a computer-readable program, when the program is executed by a logic component, the logic component can realize the above-mentioned device or constituent component, or the logic component can realize the above-mentioned various methods Or steps. This application also relates to storage media used to store the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memory, etc.

The method/device described in conjunction with the embodiments of the present application may be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams and/or one or more combinations of the functional block diagrams shown in the figure may correspond to each software module of the computer program flow or each hardware module. These software modules can respectively correspond to the steps shown in the figure. These hardware modules can be implemented by solidifying these software modules using a field programmable gate array (FPGA), for example.

The software module can be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other form of storage medium known in the art. A storage medium may be coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be a component of the processor. The processor and the storage medium may be located in the ASIC. The software module can be stored in the memory of the mobile terminal, or can be stored in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a larger-capacity MEGA-SIM card or a large-capacity flash memory device, the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.

One or more of the functional blocks and/or one or more combinations of the functional blocks described in the drawings can be implemented as general-purpose processors, digital signal processors (DSPs) for performing the functions described in this application. ), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any appropriate combination thereof. One or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, and multiple micro-processing Processor, one or more microprocessors in communication with the DSP, or any other such configuration.

The application is described above in conjunction with specific implementations, but it should be clear to those skilled in the art that these descriptions are all exemplary and do not limit the scope of protection of the application. Those skilled in the art can make various variations and modifications to the application according to the spirit and principle of the application, and these variations and modifications are also within the scope of the application.

Regarding the implementation including the above examples, the following supplementary notes are also disclosed:

1. A random access method applied to terminal equipment, the method comprising:

Selecting random access resources according to the random access type; and

Wherein, the first type supports a first contention random access (CBRA) process and a first non-contention random access (CFRA) process, and the second type supports a second contention random access (CBRA) process and a second Non-contention random access procedure (CFRA).

2. The method according to appendix 1, wherein the determining that the random access type is the first type or the second type according to the random access resource configuration of the terminal device includes:

In the case that only the second random access resource is configured on the bandwidth part (BWP) selected by the terminal device for random access, the random access type is determined to be the second type; or,

In the case where only the first random access resource is configured on the bandwidth portion (BWP) selected by the terminal device for random access, it is determined that the random access type is the first type.

3. The method according to appendix 1, wherein the determining that the random access type is the first type or the second type according to the random access resource configuration of the terminal device includes:

According to the non-competitive random access resource configuration of the terminal device, it is determined that the random access type is the first type or the second type.

4. The method as described in Appendix 3, wherein:

The non-competitive random access resource includes a first non-competitive random access resource or a second non-competitive random access resource,

Wherein, the first non-contention random access resource and the second non-competition random access resource are not configured at the same time on one bandwidth part (BWP).

5. The method as described in Appendix 3, wherein:

In the case that the terminal device is configured with the first non-contention random access (CFRA) resource, determine that the random access type is the first type; or,

In the case that the terminal device is configured with a second non-contention random access (CFRA) resource, it is determined that the random access type is the second type.

6. The method as described in appendix 5, wherein:

The first non-contention random access (CFRA) resource or the second non-contention random access (CFRA) resource is configured by radio resource control (RRC) signaling,

The first non-contention random access resource includes at least: a first non-contention random access (CFRA) preamble index related to a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS);

The second non-contention random access resource includes at least a second non-contention random access (CFRA) preamble index related to a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS).

7. The method as described in appendix 5, wherein:

The first non-contention random access (CFRA) resource or the second non-contention random access (CFRA) resource is configured by a physical downlink control channel (PDCCH) command,

The first non-contention random access resource includes at least: a non-contention random access (CFRA) preamble index related to a synchronization signal block (SSB); the second non-competition random access resource includes at least: and one synchronization signal block (SSB); The second non-contention random access (CFRA) preamble index associated with the synchronization signal block (SSB).

8. The method as described in appendix 5, wherein:

When the random access process is initiated due to a system information request (SI request), and in the case that the terminal device is configured with the first non-competitive random access resource for the system information request, it is determined that the random access The input type is the first type; or,

In the case that the random access process is initiated due to a system information request (SI request), and the terminal device is configured with the second non-competitive random access resource for the system information request, determine the random access The type is the second type.

9. The method as described in appendix 5, wherein:

In the case where the random access process is initiated due to beam failure recovery (BFR), and the terminal device is configured with the first non-competitive random access resource for beam failure recovery, determine the random access type Is the first type; or

In the case that the random access process is initiated due to beam failure recovery, and the terminal device is configured with a second non-competitive random access resource for beam failure recovery, it is determined that the random access type is second type.

10. The method according to appendix 3, wherein the random access process is initiated due to a physical downlink control channel (PDCCH) command, and the random access preamble configured by the physical downlink control channel command is not 0 In the case of, it is determined that the random access type is the first type.

11. The method according to appendix 3, wherein the random access process is initiated due to a system information request (SI request), and the terminal device is configured with the first non-competitive random access for the system information request. In the case of accessing resources, it is determined that the random access type is the first type.

12. The method according to appendix 3, wherein the random access process is initiated due to beam failure recovery (BFR), and the terminal device is configured with the first non-contention random access for beam failure recovery In the case of resource access, it is determined that the random access type is the first type.

13. The method according to appendix 1, wherein, before selecting random access resources, the method further includes:

Determine whether the random access type is the first type or the second type according to the received power of the downlink reference signal measured by the terminal device.

14. The method as described in appendix 13, wherein:

When the received power of the downlink reference signal measured by the terminal device is higher than the first threshold, the random access type is determined to be the second type; otherwise, the random access type is determined to be the first type.

15. The method as described in Supplement 14, wherein:

When the terminal device selects an additional uplink (SUL) carrier for random access, the first threshold is the first threshold of the additional uplink,

When the terminal device selects a normal uplink (NUL) carrier for random access, the first threshold is the first threshold of the normal uplink.

16. The method as described in Supplement 15, wherein:

The first threshold is a synchronization signal block (SSB)-based measurement threshold parameter configured by radio resource control (RRC) signaling.

17. The method as described in Appendix 1, wherein:

When the random access type is the first type, the selection of random access resources includes:

Determine the beam, preamble and physical random access channel opportunity (PRACH occasion) for sending the first message (msg1);

In the case where the random access type is the second type, the selection of random access resources includes:

Determine the beam for sending the second information (msgA), the preamble, the physical random access channel opportunity (PRACH occasion), and the uplink grant for the physical uplink shared channel (PUSCH).

18. The method according to appendix 17, wherein the determining a beam and a preamble for sending the first information (msg1) includes:

When the terminal device receives a physical downlink control channel (PDCCH) command and the preamble index configured in the physical downlink control channel command is not 0, random access to the first information (msg1) to be sent The index of the preamble is set as the configured random access preamble index, and the configured synchronization signal block (SSB) is selected as the synchronization signal block (SSB) for transmitting the first information (msg1).

19. The method according to appendix 17, wherein the determining a beam and a preamble for sending the first information (msg1) includes:

In the case where the random access process is initiated due to a system information request (SI request), and the terminal device is configured with the first non-competitive random access resource for the system information request,

If the measured value of the synchronization signal block reference signal received power (SSB-RSRP) of at least one synchronization signal block (SSB) is higher than the synchronization signal block (SSB) selection threshold configured by the network device, select the at least one synchronization signal block A synchronization signal block of, otherwise, select any synchronization signal block; and

The random access preamble is set according to the preamble corresponding to the selected synchronization signal block (SSB).

20. The method according to appendix 17, wherein the determining a beam and a preamble for sending the first information (msg1) includes:

In the case that the terminal device is configured with the first non-contention random access resource by dedicated RRC signaling,

If the measured received power of the synchronization signal block reference signal received power (SSB-RSRP) of at least one synchronization signal block (SSB) configured by the network device is higher than the configured synchronization signal block (SSB) selection threshold, select the at least one synchronization signal block (SSB) One synchronization signal block in the signal block; and

21. The method according to appendix 17, wherein the determining a beam and a preamble for sending the first information (msg1) includes:

If the measured received power of the channel state information reference signal (CSI-RSRP) of at least one channel state information reference signal (CSI-RS) configured by the network device is higher than the configured channel state information reference signal (CSI-RS) selection threshold , Select one channel state information reference signal (CSI-RS) among the at least one channel state information reference signal (CSI-RS); and

The random access preamble is set according to the preamble corresponding to the selected channel state information reference signal (CSI-RS).

22. The method according to Supplement 20 or 21, wherein the method further comprises:

If no synchronization signal block or a channel state information reference signal is selected, any synchronization signal block or channel state information reference signal is selected.

23. The method according to appendix 17, wherein the determining a beam and a preamble for sending the first information (msg1) includes:

In the case where the random access process is initiated due to beam failure recovery (BFR, Beam Failure Recovery), and the terminal device is configured with the first non-competitive random access resource for beam failure recovery,

If the measured received power of the synchronization signal block reference signal received power (SSB-RSRP) of at least one candidate synchronization signal block (SSB) configured by the network device is higher than the configured synchronization signal block (SSB) selection threshold, select the at least one One of the candidate synchronization signal blocks; and

24. The method according to appendix 17, wherein the determining a beam and a preamble for sending the first information (msg1) includes:

In the case where the random access process is initiated due to beam failure recovery, and the terminal device is configured with the first non-competitive random access resource for beam failure recovery (BFR, Beam Failure Recovery),

If the measured received power of the channel state information reference signal (CSI-RSRP) of at least one candidate channel state information reference signal (CSI-RS) configured by the network device is higher than the configured channel state information reference signal (CSI-RS) selection Threshold, select one channel state information reference signal (CSI-RS) among the at least one candidate channel state information reference signal (CSI-RS); and

25. The method according to appendix 23 or 24, wherein the method further comprises:

26. The method according to appendix 17, wherein the determining a beam and a preamble for sending the second information (msgA) includes:

When the terminal device receives a physical downlink control channel (PDCCH) command and the preamble index configured in the physical downlink control channel command is not 0, random access to the second information (msgA) to be sent The index of the preamble is set as the configured random access preamble index, and the configured synchronization signal block (SSB) is selected as the synchronization signal block (SSB) for transmitting the second information (msgA).

27. The method according to appendix 17, wherein the determining a beam and a preamble for sending the second information (msgA) includes:

In the case that the random access process is initiated due to a system information request (SI request), and the terminal device is configured with a second non-competitive random access resource for the system information request,

28. The method according to appendix 17, wherein the determining a beam and a preamble for sending the second information (msgA) includes:

In the case that the terminal device is configured with a second non-contention random access resource by dedicated RRC signaling,

The random access preamble is set according to the preamble corresponding to the selected one synchronization signal block (SSB).

29. The method according to appendix 17, wherein the determining a beam and a preamble for sending the second information (msgA) includes:

30. The method according to appendix 28 or 29, wherein the method further comprises:

If no SSB or CSI-RS is selected, any synchronization signal block is selected.

31. The method according to appendix 17, wherein the determining a beam and a preamble for sending the second information (msgA) includes:

In the case where the random access process is initiated due to beam failure recovery (BFR, Beam Failure Recovery), and the terminal device is configured with a second non-competitive random access resource for beam failure recovery,

32. The method according to appendix 17, wherein the determining a beam and a preamble for sending the second information (msgA) includes:

33. The method according to appendix 31 or 32, wherein the method further comprises:

If no SSB or CSI-RS is selected, any synchronization signal block is selected.

34. The method according to any one of Supplements 17, 26-33, wherein the determining the PUSCH uplink grant of the second information (msgA) includes:

Determine the uplink grant of the physical uplink shared channel (PUSCH) resource associated with the preamble of the selected second information (msgA) and the physical random access channel opportunity (PRACH occasion).

35. The method as described in Supplement 34, wherein:

The K second information (msgA) preambles are a group of preambles mapped to an available physical uplink shared channel opportunity, where K is an integer greater than or equal to 1.

36. The method as described in Supplement 35, wherein:

The second information (msgA) preamble in the available physical random access channel opportunity (PRACH occasion) of a time slot is sorted in the first order, and is mapped to the physical uplink shared channel opportunity (PUSCH) in the second order. occasion).

37. The method as described in Supplement 36, wherein:

K=ceil(Npreamble/Npusch), where Npreamble is the second information (msgA) random access channel in all available physical random access channel opportunities in the synchronization signal block (SSB) and physical random access channel opportunity mapping period The total number of preambles, Npusch is the total number of physical uplink shared channel opportunities in the synchronization signal block (SSB) and physical random access channel opportunity mapping period and the demodulation reference signal (DMRS) in a physical uplink shared channel opportunity (PUSCH occasion) ) The product of the number of indexes.

38. The method as described in Supplement 36, wherein:

The second information (msgA) preamble in the available physical random access channel opportunity (PRACH occasion) of a time slot is sorted in a first order, and includes:

The second information (msgA) preamble is sorted according to the first predetermined order of the preamble index (Preamble Index) within a physical random access channel opportunity; and,

Within the physical random access channel opportunities multiplexed in the frequency domain, sort according to the second predetermined order of the frequency domain resource index of the physical random access channel opportunities; and

Within the physical random access channel opportunities multiplexed in the time domain in one time slot, sort according to the third predetermined order of the time resource index of the physical random access channel opportunities.

39. The method as described in Supplement 36, wherein:

The mapping to the physical uplink shared channel opportunity in the second order includes:

For the physical uplink shared channel opportunity multiplexed in the frequency domain, map to the physical uplink shared channel opportunity according to the fourth predetermined order of the frequency domain resource index of the physical uplink shared channel opportunity; and

In one of the physical uplink shared channel opportunities, map to the physical uplink shared channel opportunities according to the fifth predetermined order of the demodulation reference signal (DMRS) index; and,

For the physical uplink shared channel opportunity time-domain multiplexed in one slot, map to the physical uplink shared channel opportunity according to the sixth predetermined order of the time resource index of the physical uplink shared channel opportunity; and ,

The physical uplink shared channel opportunity is mapped to the physical uplink shared channel opportunity according to the seventh predetermined order of the slot index of the physical uplink shared channel opportunity.

40. The method according to any one of Supplementary Notes 1-39, wherein:

In the case that the random access is not successfully completed, the random access type is kept unchanged, and the random access resource selection is performed again.

41. The method as described in Supplement 34, wherein:

The terminal device is configured with a first physical uplink shared channel (PUSCH) uplink grant configuration and a second physical uplink shared channel (PUSCH) uplink grant configuration for the second non-contention random access (CFRA).

42. The method according to appendix 41, wherein determining the uplink grant of the PUSCH comprises: determining the use of the first PUSCH uplink grant configuration or the use of the first PUSCH according to the size of the payload data of the potential second message (MsgA) The second PUSCH uplink grant configuration.

43. The method according to appendix 42, wherein if the size of the payload data of the potential second message (MsgA) is greater than the transport block size based on the first PUSCH uplink grant configuration, it is determined to use the first PUSCH uplink grant configuration. 2. PUSCH uplink authorization configuration.

44. A random access method applied to a network device, the method comprising:

Configure random access resources for terminal equipment; and

Receive the initial message of random access on the random access resource.

45. The method according to Supplement 44, wherein the random access resource configuration for the terminal device includes:

The first random access resource and/or the second random access resource are configured on the bandwidth part (BWP).

46. The method according to appendix 44, wherein the configuration of random access resources for the terminal device includes: configuration of non-competitive random access resources for the terminal device, wherein the non-competitive random access resources include The first non-contention random access resource or the second non-contention random access resource.

47. The method according to appendix 46, wherein the first non-contention random access (CFRA) resource or the second non-contention random access (CFRA) resource is performed by radio resource control (RRC) signaling Configuration,

The first non-contention random access resource includes: a first non-contention random access preamble index related to a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS);

The second non-contention random access resource includes: a second non-contention random access preamble index related to a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS).

48. The method as described in Supplement 46, wherein:

The first non-contention random access (CFRA) resource or the second non-contention random access (CFRA) resource resource is configured by a physical downlink control channel (PDCCH) command,

The first non-contention random access resource includes at least: a first non-contention random access (CFRA) preamble index related to a synchronization signal block (SSB); the second non-contention random access resource includes at least: The second non-contention random access (CFRA) preamble index associated with a synchronization signal block (SSB).

49. The method according to Supplement 46, wherein the random access resource configuration for the terminal device includes:

The terminal device is configured with the first non-competitive random access resource or the second non-competitive random access resource used for the system information request (SI request).

50. The method according to Supplement 46, wherein the random access resource configuration for the terminal device includes:

The terminal device is configured with the first non-competitive random access resource or the second non-competitive random access resource used for beam failure recovery (BFR, Beam Failure Recovery).

51. The method according to Supplement 44, wherein the random access resource configuration for the terminal device includes:

Configure the first competing random access resource or the second competing random access resource through the system information.

52. The method according to Supplement 44, wherein the method further comprises:

Send a first threshold to the terminal device, where the first threshold is used by the terminal device to determine whether the random access type is the first type or the second type.

53. The method according to Supplement 50, wherein the first threshold includes a first threshold of an additional uplink (SUL) or a first threshold of a normal uplink.

Claims

A random access device, which is applied to terminal equipment, includes a first processing unit, and the first processing unit is configured to:

Determine whether the random access type is the first type or the second type according to the random access resource configuration of the terminal device;

Selecting random access resources according to the random access type; and

Send on the selected random access resource

Wherein, the first type supports a first contention random access (CBRA) process and a first non-contention random access (CFRA) process, and the second type supports a second contention random access (CBRA) process and a second Non-contention random access (CFRA) process.
The apparatus according to claim 1, wherein the determining that the random access type is the first type or the second type according to the random access resource configuration of the terminal device comprises:

In the case that only the second random access resource is configured on the bandwidth part (BWP) selected by the terminal device for random access, the random access type is determined to be the second type; or,

In the case where only the first random access resource is configured on the bandwidth portion (BWP) selected by the terminal device for random access, it is determined that the random access type is the first type.
The apparatus according to claim 1, wherein the determining that the random access type is the first type or the second type according to the random access resource configuration of the terminal device comprises:

According to the non-competitive random access resource configuration of the terminal device, it is determined that the random access type is the first type or the second type.
The device of claim 3, wherein:

The non-competitive random access resource includes a first non-competitive random access resource or a second non-competitive random access resource,

Wherein, the first non-contention random access resource and the second non-competition random access resource are not configured at the same time on one bandwidth part (BWP).
The device of claim 3, wherein:

In the case that the terminal device is configured with the first non-contention random access (CFRA) resource, determine that the random access type is the first type; or,

In the case that the terminal device is configured with a second non-contention random access (CFRA) resource, it is determined that the random access type is the second type.
The device of claim 5, wherein:

The first non-contention random access (CFRA) resource or the second non-contention random access (CFRA) resource is configured by radio resource control (RRC) signaling,

The first non-contention random access resource includes at least: a first non-contention random access (CFRA) preamble index related to a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS);

The second non-contention random access resource includes at least a second non-contention random access (CFRA) preamble index related to a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS).
The apparatus of claim 3, wherein the random access process is initiated due to a physical downlink control channel (PDCCH) command, and the random access preamble configured by the physical downlink control channel command is not 0 Next, it is determined that the random access type is the first type.
The apparatus of claim 3, wherein the random access process is initiated due to a system information request (SIrequest), and the terminal device is configured with a first non-competitive random access resource for the system information request In the case of, it is determined that the random access type is the first type.
The apparatus of claim 3, wherein the random access procedure is initiated due to beam failure recovery (BFR), and the terminal device is configured with a first non-competitive random access resource for beam failure recovery In the case of, it is determined that the random access type is the first type.
The apparatus of claim 1, wherein the first processing unit is further configured to:

Before selecting the random access resource, determine whether the random access type is the first type or the second type according to the received power of the downlink reference signal measured by the terminal device.
The device of claim 1, wherein:

When the random access type is the first type, the selection of random access resources includes:

Determine the beam, preamble and physical random access channel opportunity (PRACH occasion) for sending the first message (msg1);

In the case where the random access type is the second type, the selection of random access resources includes:

Determine the beam for sending the second information (msgA), the preamble, the physical random access channel opportunity (PRACH occasion), and the uplink grant for the physical uplink shared channel (PUSCH).
The apparatus according to claim 11, wherein the determining the uplink grant of the physical uplink shared channel (PUSCH) of the second information (msgA) comprises:

Determine the uplink grant of the physical uplink shared channel (PUSCH) resource associated with the preamble of the selected second information (msgA) and the physical random access channel opportunity (PRACH occasion).
The device of claim 12, wherein:

The K second information (msgA) preambles are a group of preambles mapped to an available physical uplink shared channel opportunity, where K is an integer greater than or equal to 1.
The device of claim 13, wherein:

The second information (msgA) preamble in the available physical random access channel opportunity (PRACH occasion) of a time slot is sorted in the first order, and is mapped to the physical uplink shared channel opportunity (PUSCH) in the second order. occasion).
The device of claim 14, wherein:

K=ceil(Npreamble/Npusch), where Npreamble is the second information (msgA) random access channel in all available physical random access channel opportunities in the synchronization signal block (SSB) and physical random access channel opportunity mapping period The total number of preambles, Npusch is the total number of physical uplink shared channel opportunities in the synchronization signal block (SSB) and physical random access channel opportunity mapping period and the demodulation reference signal (DMRS) in a physical uplink shared channel opportunity (PUSCHoccasion) The product of the number of indexes.
The device of claim 14, wherein:

The second information (msgA) preamble in the available physical random access channel opportunity (PRACH occasion) of a time slot is sorted in a first order, and includes:

The second information (msgA) preamble is sorted according to the first predetermined order of the preamble index (Preamble Index) within a physical random access channel opportunity; and,

Within the physical random access channel opportunities multiplexed in the frequency domain, sort according to the second predetermined order of the frequency domain resource index of the physical random access channel opportunities; and

Within the physical random access channel opportunities multiplexed in the time domain in one time slot, sort according to the third predetermined order of the time resource index of the physical random access channel opportunities.
The device of claim 14, wherein:

The mapping to the physical uplink shared channel opportunity in the second order includes:

For the physical uplink shared channel opportunity multiplexed in the frequency domain, map to the physical uplink shared channel opportunity according to the fourth predetermined order of the frequency domain resource index of the physical uplink shared channel opportunity; and

In one of the physical uplink shared channel opportunities, map to the physical uplink shared channel opportunities according to the fifth predetermined order of the demodulation reference signal (DMRS) index; and,

For the physical uplink shared channel opportunity time-domain multiplexed in one slot, map to the physical uplink shared channel opportunity according to the sixth predetermined order of the time resource index of the physical uplink shared channel opportunity; and ,

The physical uplink shared channel opportunity is mapped to the physical uplink shared channel opportunity according to the seventh predetermined order of the slot index of the physical uplink shared channel opportunity.
A random access device applied to a network device, the device includes a second processing unit, and the second processing unit is configured to:

Configure random access resources for terminal equipment; and

Receive the initial message of random access on the random access resource.
The apparatus according to claim 18, wherein the random access resource configuration for the terminal equipment comprises:

The first random access resource and/or the second random access resource are configured on the bandwidth part (BWP).
A communication system including:

A terminal device having the random access device according to any one of claims 1-17; and

A network device having the random access device according to any one of claims 18-19.