WO2020024616A1 - 一种随机接入方法及相关设备 - Google Patents

一种随机接入方法及相关设备 Download PDF

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Publication number
WO2020024616A1
WO2020024616A1 PCT/CN2019/082138 CN2019082138W WO2020024616A1 WO 2020024616 A1 WO2020024616 A1 WO 2020024616A1 CN 2019082138 W CN2019082138 W CN 2019082138W WO 2020024616 A1 WO2020024616 A1 WO 2020024616A1
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WIPO (PCT)
Prior art keywords
random access
terminal device
access response
indication information
response
Prior art date
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Ceased
Application number
PCT/CN2019/082138
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English (en)
French (fr)
Chinese (zh)
Inventor
石聪
王淑坤
杨宁
卢前溪
尤心
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to AU2019314851A priority Critical patent/AU2019314851A1/en
Priority to CN202110321544.8A priority patent/CN113068273B/zh
Priority to JP2021504789A priority patent/JP7297866B2/ja
Priority to CN201980050257.9A priority patent/CN112534947A/zh
Priority to BR112021001410-1A priority patent/BR112021001410A2/pt
Priority to KR1020217003636A priority patent/KR20210036931A/ko
Priority to MX2021001094A priority patent/MX2021001094A/es
Priority to EP19843564.6A priority patent/EP3817499B1/en
Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CA3108098A priority patent/CA3108098C/en
Priority to TW108126653A priority patent/TW202008837A/zh
Publication of WO2020024616A1 publication Critical patent/WO2020024616A1/zh
Priority to US17/160,834 priority patent/US20210153247A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0836—Random access procedures, e.g. with 4-step access with 2-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0838—Random access procedures, e.g. with 4-step access using contention-free random access [CFRA]

Definitions

  • the present invention relates to the field of information processing technologies, and in particular, to a random access method, a terminal device, a network device, a chip, a computer-readable storage medium, a computer program product, and a computer program.
  • NR new radio
  • two kinds of random access methods are mainly supported, a contention-based random access method and a non-contention-based random access method.
  • embodiments of the present invention provide a random access method, a terminal device, a network device, a chip, a computer-readable storage medium, a computer program product, and a computer program.
  • a random access method which is applied to a terminal device, and the method includes:
  • the indication information can at least indicate different types of random access responses, or can indicate different types of random access procedures.
  • a random access method is provided, which is applied to a network device.
  • the method includes:
  • the random access response message includes indication information, and the indication information can at least indicate different types of random access responses, or can indicate different types of random access processes.
  • a terminal device including:
  • a first communication unit receiving a random access response message sent by the network side
  • a first processing unit based on the indication information in the random access response message, determining whether the random access response in the random access response message is directed to the terminal device;
  • the indication information can at least indicate different types of random access responses, or can indicate different types of random access procedures.
  • a network device including:
  • a second communication unit sending a random access response message to the terminal device
  • the random access response message includes indication information, and the indication information can at least indicate different types of random access responses, or can indicate different types of random access processes.
  • a terminal device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory, and execute the method in the above-mentioned first aspect or its implementations.
  • a network device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the second aspect or the implementations thereof.
  • a chip is provided for implementing any one of the first to second aspects or a method in each implementation thereof.
  • the chip includes a processor for invoking and running a computer program from a memory, so that a device installed with the chip executes any one of the first aspect to the second aspect described above or implementations thereof. method.
  • a computer-readable storage medium for storing a computer program that causes a computer to execute the method in any one of the first to second aspects described above or in its implementations.
  • a computer program product including computer program instructions that cause a computer to execute the method in any one of the first to second aspects described above or in various implementations thereof.
  • a computer program that, when run on a computer, causes the computer to execute the method in any one of the first to second aspects described above or in its implementations.
  • the technical solution in the embodiment of the present application can determine whether a random access response for a terminal device is received by using the indication information in a random access response message sent by the network side to the terminal device; and, the instruction information can indicate Random access response type or random access procedure type. In this way, it is ensured that in a system with multiple random access processes, the terminal device can correctly receive a random access response that conforms to the type of its own random access process.
  • FIG. 1 is a schematic diagram 1 of a communication system architecture according to an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a random access method according to an embodiment of the present application.
  • Figure 3-6 shows the RAR information content
  • FIG. 7 is a schematic diagram of a random access processing flow
  • FIG. 8 is a schematic structural diagram of a structure of a terminal device according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of a chip according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram 2 of a communication system architecture provided by an embodiment of the present application.
  • GSM Global System for Mobile
  • CDMA Code Division Multiple Access
  • Wideband Code Division Multiple Access Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the communication system 100 applied in the embodiment of the present application may be shown in FIG. 1.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or a communication terminal or a terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located within the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, or a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system.
  • BTS Base Transceiver Station
  • NodeB NodeB
  • the network device may be a mobile switching center, relay station, access point, vehicle equipment, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in public land mobile networks (PLMN) that will evolve in the future.
  • PLMN public land mobile networks
  • the communication system 100 further includes at least one terminal device 120 located within a coverage area of the network device 110.
  • terminal equipment used herein includes, but is not limited to, connection via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection ; And / or another data connection / network; and / or via a wireless interface, such as for cellular networks, Wireless Local Area Networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and / or another terminal device configured to receive / transmit communication signals; and / or Internet of Things (IoT) devices.
  • PSTN Public Switched Telephone Networks
  • DSL Digital Subscriber Line
  • WLAN Wireless Local Area Networks
  • DVB-H Digital Video Broadband
  • satellite networks satellite networks
  • AM- FM broadcast transmitter AM- FM broadcast transmitter
  • IoT Internet of Things
  • a terminal device configured to communicate through a wireless interface may be referred to as a “wireless communication terminal”, a “wireless terminal”, or a “mobile terminal”.
  • mobile terminals include, but are not limited to, satellite or cellular phones; personal communications systems (PCS) terminals that can combine cellular radiotelephones with data processing, facsimile, and data communications capabilities; can include radiotelephones, pagers, Internet / internal PDA with network access, web browser, notepad, calendar, and / or Global Positioning System (GPS) receiver; and conventional laptop and / or palm-type receivers or others including radiotelephone transceivers Electronic device.
  • PCS personal communications systems
  • GPS Global Positioning System
  • a terminal device can refer to an access terminal, user equipment (User Equipment), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or User device.
  • the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Processing (PDA), and wireless communication.
  • terminal devices 120 may perform terminal direct device (D2D) communication.
  • D2D terminal direct device
  • the 5G system or the 5G network may also be referred to as a New Radio (NR) system or an NR network.
  • NR New Radio
  • FIG. 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.
  • the communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like in this embodiment of the present application is not limited thereto.
  • network entities such as a network controller, a mobility management entity, and the like in this embodiment of the present application is not limited thereto.
  • the device having a communication function in the network / system in the embodiments of the present application may be referred to as a communication device.
  • the communication device may include a network device 110 and a terminal device 120 having a communication function, and the network device 110 and the terminal device 120 may be specific devices described above, and are not described herein again.
  • the communication device may also include other devices in the communication system 100, such as other network entities such as a network controller, a mobile management entity, and the like, which is not limited in the embodiments of the present application.
  • an embodiment of the present application provides a random access method, which is applied to a terminal device.
  • the method includes:
  • Step 201 Receive a random access response message from the network side
  • Step 202 determine whether the random access response in the random access response message is directed to the terminal device based on the indication information in the random access response message;
  • the indication information can at least indicate different types of random access responses, or can indicate different types of random access procedures.
  • the indication information includes: the first indication information is a Random Access Preamble Identifier (RAPID, Random Access Preamble Identifier) in the random access response message; wherein the RAPID is used to indicate different types of random access procedures Or, to indicate different types of random access responses.
  • RAPID Random Access Preamble Identifier
  • RAPID is different from the definition in the prior art, and can be used to indicate the type of random access procedure, or to indicate the response of different random access procedures.
  • a specific processing method is:
  • Group RAPIDs and group preambles For example, there can be groups A and B. If the UE chooses a two-step random access process, when sending msg1, the random access preamble is selected from group A; If the UE chooses a four-step random access procedure, when transmitting msg1, the preamble is selected from group B.
  • the indication information includes: the first indication information is a Random Access Preamble Identifier (RAPID, Random Access Preamble Identifier) in the random access response message; wherein the RAPID is used to indicate different types of random access procedures Or, to indicate different types of random access responses.
  • RAPID Random Access Preamble Identifier
  • RAPID is different from the definition in the prior art, and can be used to indicate the type of random access procedure, or to indicate the response of different random access procedures.
  • This method is different from the first method in that, in this method, preambles may not be grouped, and only two-step random access procedures and four-step random access procedures need to be defined to use different PRACH resources;
  • resources corresponding to the two-step random access process and the four-step random access process can be used to group resources, but their preamble may use the same preamble.
  • PRACH Physical Random Access Channel
  • the PRACH may not be grouped, and only different types of random access procedures need to be set to correspond to different PRACH resources.
  • the preamble can distinguish different types of RACH processes.
  • the reason is that due to PRACH resource grouping, UEs using different RACH processes calculate different RA-RNTIs (RA-RNTI is calculated based on the time-frequency position of PRACH resources); RA-RNTI is different, so it can resolve different RAR messages.
  • the second indication information indicates a random access process type or a random access response type.
  • the indication information further includes: second indication information, which is used to indicate different types of random access procedures, or is used to indicate different types of random access responses.
  • This scenario differs from scenario 1 in that the RAPID included in the first indication information in this scenario does not indicate the random access process type or the random access response type. That is, the first indication information includes only ordinary RAPID.
  • the ordinary RAPID in this scenario is different from the RAPID in scenario 1.
  • the different types of random access processes referred to by ordinary RAPID in this scenario do not distinguish between PRACH resources, that is, PRACH resources are PRACH time-frequency resources and / or code resources are shared resources.
  • the second indication information is used to indicate the type of the random access process and the type of the random access response.
  • This scenario may be a case where the indication information includes only the second indication information.
  • the second indication information may include RAPID and an indication about a random access process type and a random access response type. That is, in this scenario, the first instruction information may not be included, and all information is indicated by the second instruction information.
  • the second indication information may be an explicit indication manner, such as:
  • the second indication information may be a first indication field in a random access response.
  • the first indication field may indicate a random access procedure type
  • the second indication information is a second indication field in a MAC sub-packet header corresponding to the random access response.
  • the second indication information is an indication field in a MAC sub-packet header corresponding to the random access response, and the indication field may indicate a random access process type.
  • the second indication information may be an implicit indication manner, such as:
  • the second indication information is a third indication field in the MAC sub-packet header corresponding to the random access response; wherein the third indication field is used to indicate a random access response length, and different random access response lengths correspond to Different types of random access processes, or different random access response lengths correspond to different types of random access responses.
  • the first random access response length corresponds to a two-step random access process type
  • the second random access response length corresponds to a four-step random access process type
  • one of the MAC sub-packets corresponding to the random access response indicates a field of the length of the random access response; different lengths represent different random access processes.
  • length a corresponds to a two-step random access process
  • length b corresponds to a four-step random access process.
  • the random access response message is The random access response is a response to the terminal device.
  • This method corresponds to the first scenario, which includes only the first indication information, and determines the random access procedure indicated by the first indication information through the correspondence between the RAPID and different types of random access procedures.
  • Types of. This method can correspond to both methods of the foregoing scenario 1.
  • Different RAPIDs correspond to different PRACH resources, that is, PRACH resources can be grouped, and then different RAPIDs correspond to different PRACH resource groups; further, different groups
  • the PRACH resources also correspond to different types of random access procedures, so the types of different random access procedures are distinguished by the RAPID in the first indication information.
  • the random access response in the random access response message be determined to be for the terminal device.
  • the random result response message may include at least: indication information and a random access response.
  • the random access response type corresponds to the random access process type selected by the terminal device according to the RAPID in the first indication information, and determine the random access response message
  • the random access response in is a response to the terminal device.
  • This method corresponds to the first scenario, which includes only the first indication information, and determines the random access response indicated by the first indication information through the correspondence between the RAPID and different types of random access response.
  • Types of. This method can correspond to both methods of the foregoing scenario 1.
  • Different RAPIDs correspond to different PRACH resources, that is, PRACH resources can be grouped, and then different RAPIDs correspond to different PRACH resource groups; further, different groups The PRACH resources corresponding to different types of random access processes, so the RAPID in the first indication information is used to distinguish between different types of random access processes or different types of random access responses.
  • the random access response in the random access response message be determined to be for the terminal device.
  • different types of random access processes correspond to different types of random access responses.
  • This can be pre-configured by the system and can be pre-configured to the terminal device through the network side so that the terminal device has the same configuration as the network side.
  • the random result response message may include at least: indication information and a random access response.
  • the random access response in the access response message is a response for the terminal device.
  • This method corresponds to the foregoing scenario 2. That is to say, the RAPID in the first indication information does not distinguish between the random access process type and the random access response type, and is only used for the indication of the preamble identification. At this time, When the RAPID is consistent and the random access process type in the second instruction information is the same as the random access process type selected by the terminal device, it can be determined that the random access response in the random access response message is directed to the terminal device.
  • the random access response in the random access response message is a response for the terminal device.
  • This method corresponds to the foregoing scenario 2. That is to say, the RAPID in the first indication information does not distinguish between the random access process type and the random access response type, and is only used for the indication of the preamble identification. At this time, When the RAPID is consistent and the random access response type in the second instruction information corresponds to the random access process type selected by the terminal device, it can be determined that the random access response in the random access response message is directed to the terminal device.
  • the RAPID obtained from the second instruction information is consistent with the random access preamble identifier sent by the terminal device, and the type of the random access process indicated by the second instruction information is the same as that of the terminal device.
  • the selected random access process types are consistent, it is determined that the random access response in the random access response message is a response for the terminal device.
  • RAPID does not distinguish between the random access process type and the random access response type. At this time, it is necessary to determine that RAPID is the same as the random access preamble, and, When the random access process type is the same as that selected by the terminal, it is determined whether the random access response is directed to the terminal device.
  • the RAPID obtained from the second instruction information is consistent with the random access preamble identifier sent by the terminal device, and the type of the random access response indicated by the second instruction information is the same as that of the terminal device.
  • the selected random access process type corresponds, it is determined that the random access response in the random access response message is a response for the terminal device.
  • RAPID does not distinguish between the random access process type and the random access response type. At this time, it is necessary to determine that RAPID is the same as the random access preamble, and, When the random access response type corresponds to the random access process type selected by the terminal, it is determined whether the random access response is directed to the terminal device.
  • the random access preamble is sent by a terminal device on a pre-configured random access resource, and is selected by the terminal device from at least two random access preambles.
  • the random access process type includes one of the following: a two-step random access process and a four-step random access process.
  • the terminal selects PRACH resources (time-frequency resources and code domain resources);
  • the terminal sends the selected preamble on the selected PRACH time-frequency resource, and the base station can estimate the uplink timing based on the preamble, and the grant size required for the terminal to transmit the third message.
  • the network sends RAR to the terminal
  • This PDCCH is a PDCCH scrambled with RA-RNTI.
  • the calculation of RA-RNTI is as follows:
  • RA-RNTI 1 + s_id + 14 ⁇ t_id + 14 ⁇ 80 ⁇ f_id + 14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id
  • RA-RNTI is related to the PRACH video resource selected by the UE
  • the terminal can obtain the PDSCH scheduled by the PDCCH, which includes the RAR (Random Access Corresponding).
  • RAR Random Access Corresponding
  • the format of the Random Access Response (RAR) is shown in Figure 3-6.
  • the RAR subheader contains BI, which is used to indicate the backoff time of the first step of retransmission messages;
  • RAPID the user indicates the preamble index received by the network;
  • RAR's payload contains TAC to adjust the uplink timing;
  • UL grant use An uplink resource indication for scheduling the third piece of information;
  • Temporary C-RNTI PDCCH (Initial Access) for scrambling the fourth piece of information.
  • the terminal transmits an RRC message on the scheduling resource
  • the Msg3 message is mainly used to inform the network what event the RACH process is triggered by. For example, if it is an initial access random process, the UE ID and establishment cause will be carried in msg3; if it is RRC reconstruction, it will carry the connected UE identity and establishment cause;
  • Msg4 has two functions, one is for contention conflict resolution; the second is to transmit RRC configuration messages to the terminal.
  • Method 1 If the UE carries the C-RNTI in the third step, the fourth message is scheduled with the C-RNTI scrambled PDCCH;
  • Method 2 If the UE does not carry the C-RNTI in the third step, such as initial access, the message in the fourth step is scheduled using the PDCCH scrambled by the TC-RNTI. The conflict is resolved through the UE receiving the PDSCH of the fourth message By matching the CCCH and SDU in the PDSCH.
  • msg1 + msg3 of the four-step RACH can be transmitted at msg1 +, and msg2 + msg4 of the four-step RACH can be transmitted at msg2 +.
  • the terminal device initiates different random access procedures on different random access resources.
  • NR two kinds of random access methods are mainly supported, a contention-based random access method and a non-contention-based random access method, as shown in FIG. 7.
  • the random access process can be triggered by the following events:
  • the random access resource has a corresponding relationship with a random access process type
  • the random access resources include time-frequency resources and / or random access preambles.
  • An embodiment of the present application provides a random access method, which is applied to a network device.
  • the method includes:
  • the random access response message includes indication information, and the indication information can at least indicate different types of random access responses, or can indicate different types of random access processes.
  • the indication information includes: the first indication information is a Random Access Preamble Identifier (RAPID, Random Access Preamble Identifier) in the random access response message; wherein the RAPID is used to indicate different types of random access procedures Or, to indicate different types of random access responses.
  • RAPID Random Access Preamble Identifier
  • RAPID is different from the definition in the prior art, and can be used to indicate the type of random access procedure, or to indicate the response of different random access procedures.
  • a specific processing method is:
  • Group RAPIDs and group preambles For example, there can be groups A and B. If the UE chooses a two-step random access process, when sending msg1, the random access preamble is selected from group A; If the UE chooses a four-step random access procedure, when transmitting msg1, the preamble is selected from group B.
  • the indication information includes: the first indication information is a Random Access Preamble Identifier (RAPID, Random Access Preamble Identifier) in the random access response message; wherein the RAPID is used to indicate different types of random access procedures Or, to indicate different types of random access responses.
  • RAPID Random Access Preamble Identifier
  • RAPID is different from the definition in the prior art, and can be used to indicate the type of random access procedure, or to indicate the response of different random access procedures.
  • This method differs from the first method in that in this method, the preambles may not be grouped, and only two PRACH resources need to be defined and a four-step random access procedure is defined using different PRACH resources;
  • resources corresponding to the two-step random access process and the four-step random access process can be used to group resources, but their preamble may use the same preamble.
  • PRACH Physical Random Access Channel
  • the PRACH may not be grouped, and only different types of random access procedures need to be set to correspond to different PRACH resources.
  • the preamble can distinguish different types of RACH processes.
  • the reason is that due to PRACH resource grouping, UEs using different RACH processes calculate different RA-RNTIs (RA-RNTI is calculated based on the time-frequency position of PRACH resources); RA-RNTI is different, so it can resolve different RAR messages.
  • the second indication information indicates a random access process type or a random access response type.
  • the indication information further includes: second indication information, used to indicate different types of random access procedures, or used to indicate different types of random access responses.
  • This scenario differs from scenario 1 in that the RAPID included in the first indication information in this scenario does not indicate the random access process type or the random access response type. That is, the first indication information includes only ordinary RAPID.
  • the ordinary RAPID in this scenario is different from the RAPID in scenario 1.
  • the different types of random access processes referred to by ordinary RAPID in this scenario do not distinguish between PRACH resources, that is, PRACH resources are PRACH time-frequency resources and / or code resources are shared resources.
  • This scenario may be a case where the indication information includes only the second indication information.
  • the second indication information may include RAPID and an indication about a random access process type and a random access response type. That is, in this scenario, the first instruction information may not be included, and all information is indicated by the second instruction information.
  • the second indication information may be an explicit indication manner, such as:
  • the second indication information may be a first indication field in a random access response.
  • the first indication field may indicate a random access procedure type
  • the second indication information is a second indication field in a MAC sub-packet header corresponding to the random access response.
  • the second indication information is an indication field in a MAC sub-packet header corresponding to the random access response, and the indication field may indicate a random access process type.
  • the second indication information may be an implicit indication manner, such as:
  • the second indication information is a third indication field in the MAC sub-packet header corresponding to the random access response; wherein the third indication field is used to indicate a random access response length, and different random access response lengths correspond to Different types of random access processes, or different random access response lengths correspond to different types of random access responses.
  • the first random access response length corresponds to a two-step random access process type
  • the second random access response length corresponds to a four-step random access process type
  • one of the MAC sub-packets corresponding to the random access response indicates a field of the length of the random access response; different lengths represent different random access processes.
  • length a corresponds to a two-step random access process
  • length b corresponds to a four-step random access process.
  • the network side may also receive different random access procedures initiated by the terminal device on different random access resources.
  • the random access resource has a corresponding relationship with a random access process type
  • the random access resources include time-frequency resources and / or random access preambles.
  • an embodiment of the present application provides a terminal device, including:
  • a first communication unit 81 configured to receive a random access response message sent by a network side
  • a first processing unit 82 configured to determine whether a random access response in the random access response message is directed to the terminal device based on the indication information in the random access response message;
  • the indication information can at least indicate different types of random access responses, or can indicate different types of random access procedures.
  • the indication information includes: the first indication information is a Random Access Preamble Identifier (RAPID, Random Access Preamble Identifier) in the random access response message; wherein the RAPID is used to indicate different types of random access procedures Or, to indicate different types of random access responses.
  • RAPID Random Access Preamble Identifier
  • RAPID is different from the definition in the prior art, and can be used to indicate the type of random access procedure, or to indicate the response of different random access procedures.
  • a specific processing method is:
  • Group RAPIDs and group preambles For example, there can be groups A and B. If the UE chooses a two-step random access process, when sending msg1, the random access preamble is selected from group A; If the UE chooses a four-step random access procedure, when transmitting msg1, the preamble is selected from group B.
  • the indication information includes: the first indication information is a Random Access Preamble Identifier (RAPID, Random Access Preamble Identifier) in the random access response message; wherein the RAPID is used to indicate different types of random access procedures Or, to indicate different types of random access responses.
  • RAPID Random Access Preamble Identifier
  • RAPID is different from the definition in the prior art, and can be used to indicate the type of random access procedure, or to indicate the response of different random access procedures.
  • This method differs from the first method in that in this method, the preambles may not be grouped, and only two PRACH resources need to be defined and a four-step random access procedure needs to be defined;
  • resources corresponding to the two-step random access process and the four-step random access process can be used to group resources, but their preamble may use the same preamble.
  • PRACH Physical Random Access Channel
  • the PRACH may not be grouped, and only different types of random access procedures need to be set to correspond to different PRACH resources.
  • the preamble can distinguish different types of RACH processes.
  • the reason is that due to PRACH resource grouping, UEs using different RACH processes calculate different RA-RNTIs (RA-RNTI is calculated based on the time-frequency position of PRACH resources); RA-RNTI is different, so it can resolve different RAR messages.
  • the second indication information indicates a random access process type or a random access response type.
  • the indication information further includes: second indication information, which is used to indicate different types of random access procedures, or is used to indicate different types of random access responses.
  • This scenario differs from scenario 1 in that the RAPID included in the first indication information in this scenario does not indicate the random access process type or the random access response type. That is, the first indication information includes only ordinary RAPID.
  • the ordinary RAPID in this scenario is different from the RAPID in scenario 1.
  • the different types of random access processes referred to by ordinary RAPID in this scenario do not distinguish between PRACH resources, that is, PRACH resources are PRACH time-frequency resources and / or code resources are shared resources.
  • This scenario may be a case where the indication information includes only the second indication information.
  • the second indication information may include RAPID and an indication about a random access process type and a random access response type. That is, in this scenario, the first instruction information may not be included, and all information is indicated by the second instruction information.
  • the second indication information may be an explicit indication manner, such as:
  • the second indication information may be a first indication field in a random access response.
  • the first indication field may indicate a random access procedure type
  • the second indication information is a second indication field in a MAC sub-packet header corresponding to the random access response.
  • the second indication information is an indication field in a MAC sub-packet header corresponding to the random access response, and the indication field may indicate a random access process type.
  • the second indication information may be an implicit indication manner, such as:
  • the second indication information is a third indication field in the MAC sub-packet header corresponding to the random access response; wherein the third indication field is used to indicate a random access response length, and different random access response lengths correspond to Different types of random access processes, or different random access response lengths correspond to different types of random access responses.
  • the first random access response length corresponds to a two-step random access process type
  • the second random access response length corresponds to a four-step random access process type
  • one of the MAC sub-packets corresponding to the random access response indicates a field of the length of the random access response; different lengths represent different random access processes.
  • length a corresponds to a two-step random access process
  • length b corresponds to a four-step random access process.
  • How the first processing unit 82 determines whether the random access response in the random access response message is directed to the terminal device based on the foregoing indication information includes one of the following methods:
  • the random access response message is The random access response is a response to the terminal device.
  • This method corresponds to the first scenario, which includes only the first indication information, and determines the random access procedure indicated by the first indication information through the correspondence between the RAPID and different types of random access procedures.
  • Types of. This method can correspond to both methods of the foregoing scenario 1.
  • Different RAPIDs correspond to different PRACH resources, that is, PRACH resources can be grouped, and then different RAPIDs correspond to different PRACH resource groups; further, different groups
  • the PRACH resources also correspond to different types of random access procedures, so the types of different random access procedures are distinguished by the RAPID in the first indication information.
  • the random access response in the random access response message be determined to be for the terminal device.
  • the random result response message may include at least: indication information and a random access response.
  • the random access response type corresponds to the random access process type selected by the terminal device according to the RAPID in the first indication information, and determine the random access response message
  • the random access response in is a response to the terminal device.
  • This method corresponds to the first scenario, which includes only the first indication information, and determines the random access response indicated by the first indication information through the correspondence between the RAPID and different types of random access response.
  • Types of. This method can correspond to both methods of the foregoing scenario 1.
  • Different RAPIDs correspond to different PRACH resources, that is, PRACH resources can be grouped, and then different RAPIDs correspond to different PRACH resource groups; further, different groups The PRACH resources corresponding to different types of random access processes, so the RAPID in the first indication information is used to distinguish between different types of random access processes or different types of random access responses.
  • the random access response in the random access response message be determined to be for the terminal device.
  • different types of random access processes correspond to different types of random access responses.
  • This can be pre-configured by the system and can be pre-configured to the terminal device through the network side so that the terminal device has the same configuration as the network side.
  • the random result response message may include at least: indication information and a random access response.
  • the random access response in the access response message is a response for the terminal device.
  • This method corresponds to the foregoing scenario 2. That is to say, the RAPID in the first indication information does not distinguish between the random access process type and the random access response type, and is only used for the indication of the preamble identification. At this time, When the RAPID is consistent and the random access process type in the second instruction information is the same as the random access process type selected by the terminal device, it can be determined that the random access response in the random access response message is directed to the terminal device.
  • the random access response in the random access response message is a response for the terminal device.
  • This method corresponds to the foregoing scenario 2. That is to say, the RAPID in the first indication information does not distinguish between the random access process type and the random access response type, and is only used for the indication of the preamble identification. At this time, When the RAPID is consistent and the random access response type in the second instruction information corresponds to the random access process type selected by the terminal device, it can be determined that the random access response in the random access response message is directed to the terminal device.
  • the RAPID obtained from the second instruction information is consistent with the random access preamble identifier sent by the terminal device, and the type of the random access process indicated by the second instruction information is the same as that of the terminal device.
  • the selected random access process types are consistent, it is determined that the random access response in the random access response message is a response for the terminal device.
  • RAPID does not distinguish between the random access process type and the random access response type. At this time, it is necessary to determine that RAPID is the same as the random access preamble, and, When the random access process type is the same as that selected by the terminal, it is determined whether the random access response is directed to the terminal device.
  • the RAPID obtained from the second instruction information is consistent with the random access preamble identifier sent by the terminal device, and the type of the random access response indicated by the second instruction information is the same as that of the terminal device.
  • the selected random access process type corresponds, it is determined that the random access response in the random access response message is a response for the terminal device.
  • RAPID does not distinguish between the random access process type and the random access response type. At this time, it is necessary to determine that RAPID is the same as the random access preamble. When the random access response type corresponds to the random access process type selected by the terminal, it is determined whether the random access response is directed to the terminal device.
  • the random access preamble is sent by a terminal device on a pre-configured random access resource, and is selected by the terminal device from at least two random access preambles.
  • the random access process type includes one of the following: a two-step random access process and a four-step random access process.
  • the terminal device initiates different random access procedures on different random access resources.
  • NR two kinds of random access methods are mainly supported, a contention-based random access method and a non-contention-based random access method, as shown in FIG. 7.
  • the random access process can be triggered by the following events:
  • the random access resource has a corresponding relationship with a random access process type
  • the random access resources include time-frequency resources and / or random access preambles.
  • the terminal device can correctly receive a random access response that conforms to the type of its own random access process.
  • An embodiment of the present application provides a network device, including:
  • a second communication unit configured to send a random access response message to the terminal device
  • the random access response message includes indication information, and the indication information can at least indicate different types of random access responses, or can indicate different types of random access processes.
  • the indication information includes: the first indication information is a Random Access Preamble Identifier (RAPID, Random Access Preamble Identifier) in the random access response message; wherein the RAPID is used to indicate different types of random access procedures Or, to indicate different types of random access responses.
  • RAPID Random Access Preamble Identifier
  • RAPID is different from the definition in the prior art, and can be used to indicate the type of random access procedure, or to indicate the response of different random access procedures.
  • a specific processing method is:
  • Group RAPIDs and group preambles For example, there can be groups A and B. If the UE chooses a two-step random access process, when sending msg1, the random access preamble is selected from group A; If the UE chooses a four-step random access procedure, when transmitting msg1, the preamble is selected from group B.
  • the indication information includes: the first indication information is a Random Access Preamble Identifier (RAPID, Random Access Preamble Identifier) in the random access response message; wherein the RAPID is used to indicate different types of random access procedures Or, to indicate different types of random access responses.
  • RAPID Random Access Preamble Identifier
  • RAPID is different from the definition in the prior art, and can be used to indicate the type of random access procedure, or to indicate the response of different random access procedures.
  • This method differs from the first method in that in this method, the preambles may not be grouped, and only two PRACH resources need to be defined and a four-step random access procedure is defined using different PRACH resources;
  • resources corresponding to the two-step random access process and the four-step random access process can be used to group resources, but their preamble may use the same preamble.
  • PRACH Physical Random Access Channel
  • the PRACH may not be grouped, and only different types of random access procedures need to be set to correspond to different PRACH resources.
  • the preamble can distinguish different types of RACH processes.
  • the reason is that due to the PRACH resource grouping, UEs using different RACH processes calculate different RA-RNTIs (RA-RNTI is calculated based on the time-frequency position of PRACH resources); RA-RNTI is different, so it can resolve different RAR messages.
  • the second indication information indicates a random access process type or a random access response type.
  • the indication information further includes: second indication information, which is used to indicate different types of random access procedures, or is used to indicate different types of random access responses.
  • This scenario differs from scenario 1 in that the RAPID included in the first indication information in this scenario does not indicate the random access process type or the random access response type. That is, the first indication information includes only ordinary RAPID.
  • the ordinary RAPID in this scenario is different from the RAPID in scenario 1.
  • the different types of random access processes referred to by ordinary RAPID in this scenario do not distinguish between PRACH resources, that is, PRACH resources are PRACH time-frequency resources and / or code resources are shared resources.
  • This scenario may be a case where the indication information includes only the second indication information.
  • the second indication information may include RAPID and an indication about a random access process type and a random access response type. That is, in this scenario, the first instruction information may not be included, and all information is indicated by the second instruction information.
  • the second indication information may be an explicit indication manner, such as:
  • the second indication information may be a first indication field in a random access response.
  • the first indication field may indicate a random access procedure type
  • the second indication information is a second indication field in a MAC sub-packet header corresponding to the random access response.
  • the second indication information is an indication field in a MAC sub-packet header corresponding to the random access response, and the indication field may indicate a random access process type.
  • the second indication information may be an implicit indication manner, such as:
  • the second indication information is a third indication field in the MAC sub-packet header corresponding to the random access response; wherein the third indication field is used to indicate a random access response length, and different random access response lengths correspond to Different types of random access processes, or different random access response lengths correspond to different types of random access responses.
  • the first random access response length corresponds to a two-step random access process type
  • the second random access response length corresponds to a four-step random access process type
  • one of the MAC sub-packets corresponding to the random access response indicates a field of the length of the random access response; different lengths represent different random access processes.
  • length a corresponds to a two-step random access process
  • length b corresponds to a four-step random access process.
  • the second communication unit is configured to receive different random access procedures initiated by the terminal device on different random access resources.
  • the random access resource has a corresponding relationship with a random access process type
  • the random access resources include time-frequency resources and / or random access preambles.
  • FIG. 9 is a schematic structural diagram of a communication device 900 according to an embodiment of the present application.
  • the communication device 900 shown in FIG. 9 includes a processor 910, and the processor 910 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the communication device 900 may further include a memory 920.
  • the processor 910 may call and run a computer program from the memory 920 to implement the method in the embodiment of the present application.
  • the memory 920 may be a separate device independent of the processor 910, or may be integrated in the processor 910.
  • the communication device 900 may further include a transceiver 930, and the processor 910 may control the transceiver 930 to communicate with other devices, and specifically, may send information or data to other devices, or receive other Information or data sent by the device.
  • the processor 910 may control the transceiver 930 to communicate with other devices, and specifically, may send information or data to other devices, or receive other Information or data sent by the device.
  • the transceiver 930 may include a transmitter and a receiver.
  • the transceiver 930 may further include antennas, and the number of antennas may be one or more.
  • the communication device 900 may specifically be a network device according to an embodiment of the present application, and the communication device 900 may implement a corresponding process implemented by a network device in each method in the embodiments of the present application. For brevity, details are not described herein again. .
  • the communication device 900 may specifically be a terminal device or a network device in the embodiments of the present application, and the communication device 900 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method in the embodiments of the present application. Concise, I won't repeat them here.
  • FIG. 10 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • the chip 1000 shown in FIG. 10 includes a processor 1010, and the processor 1010 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the chip 1000 may further include a memory 1020.
  • the processor 1010 may call and run a computer program from the memory 1020 to implement the method in the embodiment of the present application.
  • the memory 1020 may be a separate device independent of the processor 1010, or may be integrated in the processor 1010.
  • the chip 1000 may further include an input interface 1030.
  • the processor 1010 may control the input interface 1030 to communicate with other devices or chips. Specifically, the processor 1010 may obtain information or data sent by the other devices or chips.
  • the chip 1000 may further include an output interface 1040.
  • the processor 1010 can control the output interface 1040 to communicate with other devices or chips. Specifically, the processor 1010 can output information or data to other devices or chips.
  • the chip may be applied to the network device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the chip may be applied to the network device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the chip may be applied to the terminal device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application.
  • the chip may implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application.
  • the chip mentioned in the embodiments of the present application may also be referred to as a system-level chip, a system chip, a chip system or a system-on-chip.
  • FIG. 11 is a schematic block diagram of a communication system 1100 according to an embodiment of the present application. As shown in FIG. 11, the communication system 1100 includes a terminal device 1110 and a network device 1120.
  • the terminal device 1110 may be used to implement the corresponding function implemented by the terminal device in the foregoing method
  • the network device 1120 may be used to implement the corresponding function implemented by the network device in the foregoing method.
  • details are not described herein again. .
  • the processor in the embodiment of the present application may be an integrated circuit chip and has a signal processing capability.
  • each step of the foregoing method embodiment may be completed by using an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the above processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (Field, Programmable Gate Array, FPGA), or other Programming logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • Various methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in combination with the embodiments of the present application may be directly implemented by a hardware decoding processor, or may be performed by using a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature storage medium such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, and the like.
  • the storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the foregoing method in combination with its hardware.
  • the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), and an electronic memory. Erase programmable read-only memory (EPROM, EEPROM) or flash memory.
  • the volatile memory may be Random Access Memory (RAM), which is used as an external cache.
  • RAM Static Random Access Memory
  • DRAM Dynamic Random Access Memory
  • Synchronous Dynamic Random Access Memory Synchronous Dynamic Random Access Memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double SDRAM, DDR SDRAM enhanced synchronous dynamic random access memory
  • Enhanced SDRAM, ESDRAM synchronous connection dynamic random access memory
  • Synchronous DRAM Synchronous Dynamic Random Access Memory
  • Enhanced SDRAM Enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory Synchrobus RAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (Double SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct RAMbus RAM, DR RAM) and so on. That is, the memories in the embodiments of the present application are intended to include, but not limited to, these and any other suitable types of memories.
  • An embodiment of the present application further provides a computer-readable storage medium for storing a computer program.
  • the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method in the embodiment of the present application. No longer.
  • the computer-readable storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the mobile terminal / terminal device in each method of the embodiment of the present application, for the sake of brevity , Will not repeat them here.
  • An embodiment of the present application further provides a computer program product, including computer program instructions.
  • the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instruction causes the computer to execute a corresponding process implemented by the network device in each method in the embodiment of the present application. More details.
  • the computer program product can be applied to a mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute a corresponding process implemented by the mobile terminal / terminal device in each method in the embodiments of the present application, For brevity, I will not repeat them here.
  • the embodiment of the present application also provides a computer program.
  • the computer program may be applied to a network device in the embodiment of the present application.
  • the computer program When the computer program is run on a computer, the computer is caused to execute a corresponding process implemented by the network device in each method in the embodiment of the present application. , Will not repeat them here.
  • the computer program may be applied to a mobile terminal / terminal device in the embodiment of the present application.
  • the computer program When the computer program is run on a computer, the computer executes each method in the embodiment of the application by the mobile terminal / terminal device. The corresponding processes are not repeated here for brevity.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.
  • the functional units in the embodiments of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of this application is essentially a part that contributes to the existing technology or a part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory) ROM, random access memory (Random Access Memory, RAM), magnetic disks or optical disks and other media that can store program codes .

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MX2021001094A MX2021001094A (es) 2018-07-30 2019-04-10 Metodo de acceso aleatorio y dispositivo relacionado.
JP2021504789A JP7297866B2 (ja) 2018-07-30 2019-04-10 ランダムアクセス方法及び関連機器
CN201980050257.9A CN112534947A (zh) 2018-07-30 2019-04-10 一种随机接入方法及相关设备
BR112021001410-1A BR112021001410A2 (pt) 2018-07-30 2019-04-10 método para acesso aleatório aplicado a um dispositivo de terminal e dispositivo de terminal
KR1020217003636A KR20210036931A (ko) 2018-07-30 2019-04-10 랜덤 액세스 방법 및 관련 기기
AU2019314851A AU2019314851A1 (en) 2018-07-30 2019-04-10 Random access method and related device
CN202110321544.8A CN113068273B (zh) 2018-07-30 2019-04-10 一种随机接入方法及相关设备
EP19843564.6A EP3817499B1 (en) 2018-07-30 2019-04-10 Random access method and related device
CA3108098A CA3108098C (en) 2018-07-30 2019-04-10 Random access method and related device
TW108126653A TW202008837A (zh) 2018-07-30 2019-07-26 一種隨機存取方法及相關設備
US17/160,834 US20210153247A1 (en) 2018-07-30 2021-01-28 Random access method and terminal device

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