WO2021159401A1 - Procédé et appareil d'accès aléatoire, et système de communication - Google Patents

Procédé et appareil d'accès aléatoire, et système de communication Download PDF

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Publication number
WO2021159401A1
WO2021159401A1 PCT/CN2020/075114 CN2020075114W WO2021159401A1 WO 2021159401 A1 WO2021159401 A1 WO 2021159401A1 CN 2020075114 W CN2020075114 W CN 2020075114W WO 2021159401 A1 WO2021159401 A1 WO 2021159401A1
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Prior art keywords
random access
type
resource
terminal device
preamble
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PCT/CN2020/075114
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English (en)
Chinese (zh)
Inventor
路杨
蒋琴艳
贾美艺
张健
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富士通株式会社
路杨
蒋琴艳
贾美艺
张健
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Priority to PCT/CN2020/075114 priority Critical patent/WO2021159401A1/fr
Publication of WO2021159401A1 publication Critical patent/WO2021159401A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the embodiments of the present application relate to the field of wireless communication technology.
  • the random access process is a very critical step in mobile communication technology.
  • FIG 1(a) is a flow chart of the existing four-step contention-based random access (CBRA, Contention-Based Random Access) process.
  • CBRA Contention-Based Random Access
  • 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;
  • RO contention-based random access opportunity
  • the network device sends Msg2.
  • the 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.
  • CRNTI temporary cell radio network temporary identifier
  • FIG. 1(b) is a flow chart of the existing two-step contention-based random access (CBRA, Contention-Based Random Access) process.
  • 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.
  • PUSCH physical uplink shared channel
  • the network device sends MsgB after receiving MsgA, thereby sending a random access response and a contention resolution message to the terminal device.
  • 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.
  • a random access method is provided, which is applied to a terminal device, and the method includes:
  • the first type includes a first contention random access (CBRA) and a first non-competition random access (CFRA)
  • the second type includes a second contention random access (CBRA) and a second non-competition random access (CFRA).
  • Access CFRA
  • a random access method is provided, which is applied to a network device, and the method includes:
  • 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.
  • 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.
  • a terminal device having the random access apparatus described in the third aspect of the embodiments of the present application.
  • a network device having the random access apparatus described in the fourth aspect of the embodiments of the present application.
  • a communication system 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.
  • 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.
  • 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.
  • 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.
  • 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 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.
  • 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. 9 is a schematic diagram of a structure of a network device in the sixth aspect of an embodiment of the present 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.
  • 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.
  • LTE Long Term Evolution
  • LTE-A Enhanced Long Term Evolution
  • LTE-A LTE-A
  • Advanced Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • High-Speed Packet Access High-Speed Packet Access
  • HSPA High-Speed Packet Access
  • 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.
  • 1G generation
  • 2G 2.5G
  • 2.75G 3G
  • 4G 4G
  • 4.5G future 5G
  • New Radio NR, New Radio
  • 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.
  • 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.).
  • NodeB Node B
  • eNodeB or eNB evolved Node B
  • gNB 5G base station
  • RRH Remote Radio Head
  • RRU Remote Radio Unit
  • relay relay
  • low-power node such as femto, pico, etc.
  • 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.
  • 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.
  • 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.
  • PDA Personal Digital Assistant
  • wireless modem wireless communication device
  • handheld device machine-type communication device
  • laptop computer machine-type communication device
  • Cordless phones smart phones
  • smart watches digital cameras, etc.
  • user equipment may also be a machine or device that performs monitoring or measurement.
  • machine or device that performs monitoring or measurement.
  • 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.
  • MTC Machine Type Communication
  • D2D Device to Device
  • M2M Machine to Machine
  • CFRA non-contention free random access
  • MsgA-based non-contention random access CFRA
  • Fig. 2(a) is a flowchart of a non-contention random access process based on Msg1
  • Fig. 2(b) is a flowchart of a non-contention random access process based on MsgA.
  • 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.
  • RRC radio resource control
  • PDCCH physical downlink control channel
  • 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.
  • RRC radio resource control
  • PDCCH physical downlink control channel
  • 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.
  • 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.
  • the communication system 300 may include a network device 301 and a terminal device 302.
  • Figure 3 only uses one terminal device as an example for illustration.
  • the network device 301 and the terminal device 302 can perform existing services or services that can be implemented in the future.
  • 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.
  • eMBB enhanced Mobile Broadband
  • mMTC large-scale machine type communication
  • URLLC Ultra-Reliable and Low- Latency Communication
  • 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. .
  • 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.
  • the first random access resource includes: a first contention random access resource and a first non-competition random access resource.
  • 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.
  • the second random access resource includes: a second contention random access resource and a second non-competition random access resource.
  • 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 is used for the two-step contention-based random access process shown in Figure 1(b); the second non-competition random access resource.
  • 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
  • Operation 403 Send an initial random access message on the selected random access resource.
  • the first type of random access type supports the first contention random access (CBRA) and first non-contention random access (CFRA) procedures
  • the second type of random access type supports The second contention random access (CBRA) and the second non-contention random access (CFRA) procedures.
  • the initial message of the first type of random access process is Msg1
  • 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.
  • PRACH physical random access channel
  • PUSCH physical uplink shared channel
  • 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 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.
  • 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.
  • operation 401 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.
  • BWP bandwidth portion
  • BWP bandwidth part
  • 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.
  • CFRA non-contention random access
  • 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.
  • BWP bandwidth part
  • 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).
  • the first non-competitive random access resource and the second non-competitive random access resource may further include: a random access opportunity (PRACH occasion).
  • 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.
  • RRC radio resource control
  • 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.
  • the random access type is set to the second type.
  • 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.
  • PDCCH physical downlink control channel
  • 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.
  • the type of random access may also be set according to the random access resource configuration of the terminal device.
  • 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.
  • 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.
  • the terminal device 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.
  • 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.
  • 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.
  • BWP block part
  • the terminal device sets the random access type to the second type to facilitate the next step of random access resource selection.
  • the terminal device sets the random access type to the first type to facilitate the next step of random access resource selection.
  • 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.
  • the terminal device determines the random access process according to the type of the non-competitive random access resource. Access type.
  • the terminal device 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.
  • 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.
  • SSB synchronization signal block
  • CSI- RS channel state information reference signal
  • PRACH occasion random access opportunity
  • the network device 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.
  • the terminal device 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.
  • 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 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.
  • a terminal device 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.
  • SI request system information requests
  • 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.
  • 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.
  • 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
  • the terminal device sets the random access type to the first type.
  • 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.
  • the terminal device 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.
  • BFR Beam Failure Recovery
  • 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.
  • 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.
  • the terminal device sets the random access type to the first type.
  • 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.
  • 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.
  • the random access type is determined to be the second type; otherwise, the random access type is determined to be the first type.
  • 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.
  • the two-step random access resource includes: a second competitive random access resource or a second non-competitive random access resource.
  • 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.
  • SUL additional uplink
  • NUL normal uplink
  • 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.
  • SSB synchronization signal block
  • RRC radio resource control
  • a random access resource is selected according to the random access type determined in operation 401 or operation 404.
  • 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).
  • determining the beam and preamble for sending the first message (msg1) includes:
  • the terminal device 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
  • the configured synchronization signal block (SSB) is selected as the synchronization signal block (SSB) for transmitting the first information (msg1).
  • 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
  • SI request system information request
  • Operation S12 Set a random access preamble according to the preamble corresponding to the selected synchronization signal block (SSB).
  • SSB selected synchronization signal block
  • any synchronization signal block is not particularly limited.
  • any synchronization signal block may be: the synchronization signal block with the highest received power, or other synchronization signal blocks.
  • determining the beam and preamble for sending the first information (msg1) includes:
  • 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
  • SSB-RSRP synchronization signal block reference signal received power
  • Operation S22 Set a random access preamble according to the preamble corresponding to the selected synchronization signal block (SSB).
  • SSB selected synchronization signal block
  • 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.
  • 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.
  • SSB-RSRP synchronization signal block reference signal received power
  • 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.
  • determining the beam and preamble for sending the first information (msg1) includes:
  • 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
  • CSI-RS channel state information reference signal
  • Operation S32 setting a random access preamble according to the preamble corresponding to the selected channel state information reference signal (CSI-RS).
  • CSI-RS channel state information reference signal
  • 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.
  • 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.
  • CSI-RS channel state information reference signal
  • CSI-RSRP channel state information reference signal received power
  • PRACH occasion physical random access channel opportunity
  • any channel state information reference signal may be: the network device configured with the highest measured received power Channel state information reference signal (CSI-RS), or other synchronization signal blocks.
  • determining the beam and preamble for sending the first information (msg1) includes:
  • 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
  • BFR Beam Failure Recovery
  • 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.
  • 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.
  • SSB-RSRP synchronization signal block reference signal received power
  • 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.
  • determining the beam and preamble for sending the first information (msg1) includes:
  • the terminal device is configured with the first non-competitive random access resource for beam failure recovery (BFR, Beam Failure Recovery)
  • BFR Beam Failure Recovery
  • 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
  • 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.
  • 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.
  • CSI-RS channel state information reference signal
  • CSI-RSRP channel state information reference signal received power
  • PRACH occasion physical random access channel opportunity
  • any channel state information reference signal may be: the network device configured with the highest measured received power Channel state information reference signal (CSI-RS), or other synchronization signal blocks.
  • 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.
  • msgA the beam for sending the second information
  • PRACH occasion physical random access channel opportunity
  • PUSCH Physical uplink shared channel
  • determining the beam and preamble for sending the second message (msgA) includes:
  • the terminal device 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
  • the configured synchronization signal block (SSB) is selected as the synchronization signal block (SSB) for sending the second information (msgA).
  • 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).
  • SSB selected synchronization signal block
  • any synchronization signal block is not particularly limited.
  • any synchronization signal block may be: the synchronization signal block with the highest received power, or other synchronization signal blocks.
  • determining the beam and preamble for sending the second information (msgA) includes:
  • 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
  • SSB-RSRP synchronization signal block reference signal received power
  • Operation S82 Set a random access preamble according to the preamble corresponding to the selected synchronization signal block (SSB).
  • 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.
  • 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.
  • SSB-RSRP synchronization signal block reference signal received power
  • PRACH occasion physical random access channel opportunity
  • 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.
  • determining the beam and preamble for sending the second information (msgA) includes:
  • 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
  • CSI-RS channel state information reference signal
  • Operation S92 Set a random access preamble according to the preamble corresponding to the selected channel state information reference signal (CSI-RS).
  • CSI-RS channel state information reference signal
  • 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.
  • 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.
  • CSI-RS channel state information reference signal
  • CSI-RSRP channel state information reference signal received power
  • PRACH occasion physical random access channel opportunity
  • any channel state information reference signal may be: the network device configured with the highest measured received power Channel state information reference signal (CSI-RS), or other synchronization signal blocks.
  • determining the beam and preamble for sending the second information (msgA) includes:
  • 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
  • BFR Beam Failure Recovery
  • S102 Set a random access preamble according to the preamble corresponding to the selected synchronization signal block (SSB).
  • SSB selected synchronization signal block
  • 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.
  • 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.
  • SSB-RSRP synchronization signal block reference signal received power
  • 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.
  • determining the beam and preamble for sending the second information (msgA) includes:
  • the terminal device is configured with the second non-competitive random access resource for beam failure recovery (BFR, Beam Failure Recovery)
  • BFR Beam Failure Recovery
  • 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
  • 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.
  • 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.
  • CSI-RS channel state information reference signal
  • CSI-RSRP channel state information reference signal received power
  • PRACH occasion physical random access channel opportunity
  • any channel state information reference signal may be: the network device configured with the highest measured received power Channel state information reference signal (CSI-RS), or other synchronization signal blocks.
  • determining the uplink grant of the PUSCH of the second information (msgA) includes:
  • PUSCH physical uplink shared channel
  • PRACH occasion Physical random access channel opportunity
  • PUSCH occasion Physical uplink shared channel opportunity
  • DMRS PUSCH demodulation reference signal
  • 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.
  • 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.
  • 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.
  • msgA the second information preamble ordered in the first order to the physical uplink shared channel opportunity (PUSCH occasion) in the second order.
  • 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.
  • 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:
  • 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 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) .
  • the random access type is the second type
  • 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.
  • the two PUSCH uplink grant configurations can adapt to different payload data sizes in the terminal equipment in the connected state.
  • 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.
  • an initial message of random access is sent on the random access resource selected in operation 402.
  • 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.
  • the selection process of random access resources can be simplified.
  • 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 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.
  • Operation 502 Receive an initial message of random access on the random access resource.
  • the network device configures the random access resource for the terminal device.
  • the terminal device can select an appropriate random access type and then determine an appropriate random access resource, thereby improving random access s efficiency.
  • performing random access resource configuration on a terminal device includes: configuring a first random access resource and/or a second random access resource on a bandwidth part (BWP).
  • 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.
  • 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.
  • 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 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).
  • 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).
  • the second non-contention random access resource also includes a physical random access channel opportunity (PRACH occasion).
  • 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.
  • 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.
  • 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).
  • the second non-contention random access resource also includes a physical random access channel opportunity (PRACH occasion).
  • 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.
  • SI request system information request
  • 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.
  • performing random access resource configuration on the terminal device 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.
  • BFR Beam Failure Recovery
  • 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).
  • 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.
  • 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.
  • 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.
  • the first threshold includes a first threshold of an additional uplink (SUL), or a first threshold of a normal uplink (NUL).
  • SUL additional uplink
  • NUL normal uplink
  • 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.
  • the network device configures the random access resource for the terminal device.
  • the terminal device can select an appropriate random access type and then determine an appropriate random access resource, thereby improving random access
  • 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 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the function of the random access apparatus 600 may be integrated into the processor 810.
  • the processor 810 may be configured to be able to implement the random access method of the first aspect of the embodiment.
  • the random access device 600 can be configured separately from the processor 810.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the random access device 700 can be configured separately from the processor 910.
  • 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.
  • 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.
  • 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.
  • 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.
  • FPGA field programmable gate array
  • 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.
  • 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.
  • DSPs digital signal processors
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • 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.
  • a random access method applied to terminal equipment comprising:
  • the first type supports a first contention random access (CBRA) process and a first non-contention random access (CFRA) process
  • the second type supports a second contention random access (CBRA) process and a second Non-contention random access procedure (CFRA).
  • the random access type is determined to be the second type; or,
  • the random access type is the first type.
  • the random access type is the first type or the second type.
  • the non-competitive random access resource includes a first non-competitive random access resource or a second non-competitive random access resource
  • 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 terminal device is configured with the first non-contention random access (CFRA) resource, determine that the random access type is the first type; or,
  • 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 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);
  • CFRA non-contention random access
  • SSB synchronization signal block
  • CSI-RS channel state information reference signal
  • 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).
  • CFRA non-contention random access
  • SSB synchronization signal block
  • CSI-RS channel state information reference signal
  • 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);
  • CFRA non-contention random access
  • the input type is the first type
  • the terminal device 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.
  • SI request system information request
  • SI request system information request
  • the terminal device 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
  • 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.
  • the random access type is determined to be the second type; otherwise, the random access type is determined to be the first type.
  • the first threshold is the first threshold of the additional uplink
  • the first threshold is the first threshold of the normal uplink.
  • the first threshold is a synchronization signal block (SSB)-based measurement threshold parameter configured by radio resource control (RRC) signaling.
  • SSB synchronization signal block
  • RRC radio resource control
  • the selection of random access resources includes:
  • the selection of random access resources includes:
  • the terminal device 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).
  • PDCCH physical downlink control channel
  • SSB configured synchronization signal block
  • the terminal device is configured with the first non-competitive random access resource for the system information request
  • SSB-RSRP synchronization signal block reference signal received power
  • the random access preamble is set according to the preamble corresponding to the selected synchronization signal block (SSB).
  • SSB selected synchronization signal block
  • the terminal device is configured with the first non-contention random access resource by dedicated RRC signaling
  • SSB-RSRP synchronization signal block reference signal received power
  • the random access preamble is set according to the preamble corresponding to the selected synchronization signal block (SSB).
  • SSB selected synchronization signal block
  • the terminal device is configured with the first non-contention random access resource by dedicated RRC signaling
  • CSI-RSRP channel state information reference signal
  • CSI-RS channel state information reference signal
  • the random access preamble is set according to the preamble corresponding to the selected channel state information reference signal (CSI-RS).
  • CSI-RS channel state information reference signal
  • any synchronization signal block or channel state information reference signal is selected.
  • 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,
  • SSB-RSRP synchronization signal block reference signal received power
  • the random access preamble is set according to the preamble corresponding to the selected synchronization signal block (SSB).
  • SSB selected synchronization signal block
  • the terminal device is configured with the first non-competitive random access resource for beam failure recovery (BFR, Beam Failure Recovery),
  • CSI-RSRP 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);
  • the random access preamble is set according to the preamble corresponding to the selected channel state information reference signal (CSI-RS).
  • CSI-RS channel state information reference signal
  • any synchronization signal block or channel state information reference signal is selected.
  • the terminal device 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).
  • 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,
  • SI request system information request
  • the terminal device is configured with a second non-competitive random access resource for the system information request
  • SSB-RSRP synchronization signal block reference signal received power
  • the random access preamble is set according to the preamble corresponding to the selected synchronization signal block (SSB).
  • SSB selected synchronization signal block
  • the terminal device is configured with a second non-contention random access resource by dedicated RRC signaling
  • SSB-RSRP synchronization signal block reference signal received power
  • the random access preamble is set according to the preamble corresponding to the selected one synchronization signal block (SSB).
  • SSB synchronization signal block
  • the terminal device is configured with a second non-contention random access resource by dedicated RRC signaling
  • CSI-RSRP channel state information reference signal
  • CSI-RS channel state information reference signal
  • the random access preamble is set according to the preamble corresponding to the selected channel state information reference signal (CSI-RS).
  • CSI-RS channel state information reference signal
  • any synchronization signal block is selected.
  • the terminal device is configured with a second non-competitive random access resource for beam failure recovery
  • SSB-RSRP synchronization signal block reference signal received power
  • the random access preamble is set according to the preamble corresponding to the selected synchronization signal block (SSB).
  • SSB selected synchronization signal block
  • the terminal device is configured with a second non-competitive random access resource for beam failure recovery
  • CSI-RSRP 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);
  • the random access preamble is set according to the preamble corresponding to the selected channel state information reference signal (CSI-RS).
  • CSI-RS channel state information reference signal
  • any synchronization signal block is selected.
  • 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 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).
  • 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
  • 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 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,
  • mapping to the physical uplink shared channel opportunity in the second order includes:
  • 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.
  • the random access type is kept unchanged, and the random access resource selection is performed again.
  • 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).
  • PUSCH physical uplink shared channel
  • PUSCH physical uplink shared channel
  • 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.
  • a random access method applied to a network device comprising:
  • the first random access resource and/or the second random access resource are configured on the bandwidth part (BWP).
  • 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.
  • 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);
  • SSB synchronization signal block
  • CSI-RS channel state information reference signal
  • 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).
  • SSB synchronization signal block
  • CSI-RS channel state information reference signal
  • 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).
  • CFRA non-contention random access
  • 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).
  • SI request system information request
  • 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).
  • BFR Beam Failure Recovery
  • the first threshold includes a first threshold of an additional uplink (SUL) or a first threshold of a normal uplink.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil de communication d'accès aléatoire, ainsi qu'un système de communication. L'appareil comprend une première unité de traitement. La première unité de traitement détermine, en fonction d'une configuration des ressources d'accès aléatoire d'un dispositif terminal, qu'un type d'accès aléatoire est un premier type ou un second type, sélectionne une ressource d'accès aléatoire en fonction du type d'accès aléatoire, puis envoie un message initial d'un accès aléatoire sur la ressource d'accès aléatoire sélectionnée, le premier type comprenant un premier accès aléatoire à base de contention (CBRA) et un premier accès aléatoire sans contention (CFRA), le second type comprenant un second CBRA et un second CFRA.
PCT/CN2020/075114 2020-02-13 2020-02-13 Procédé et appareil d'accès aléatoire, et système de communication WO2021159401A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023102944A1 (fr) * 2021-12-10 2023-06-15 北京小米移动软件有限公司 Procédé et dispositif de détermination de seuil pour accès aléatoire sans contention (cfra), support de stockage et appareil

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107734601A (zh) * 2016-08-12 2018-02-23 中兴通讯股份有限公司 无线通信系统中的随机接入方法及装置
CN107734690A (zh) * 2016-08-12 2018-02-23 华为技术有限公司 随机接入方法、装置、系统、终端和基站
CN109699087A (zh) * 2017-10-20 2019-04-30 维沃移动通信有限公司 随机接入的方法、设备及终端
US20190357063A1 (en) * 2018-05-18 2019-11-21 Lg Electronics Inc. Method for configuring candidate beams for random access process in wirless communication system and apparatus therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107734601A (zh) * 2016-08-12 2018-02-23 中兴通讯股份有限公司 无线通信系统中的随机接入方法及装置
CN107734690A (zh) * 2016-08-12 2018-02-23 华为技术有限公司 随机接入方法、装置、系统、终端和基站
CN109699087A (zh) * 2017-10-20 2019-04-30 维沃移动通信有限公司 随机接入的方法、设备及终端
US20190357063A1 (en) * 2018-05-18 2019-11-21 Lg Electronics Inc. Method for configuring candidate beams for random access process in wirless communication system and apparatus therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023102944A1 (fr) * 2021-12-10 2023-06-15 北京小米移动软件有限公司 Procédé et dispositif de détermination de seuil pour accès aléatoire sans contention (cfra), support de stockage et appareil

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