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WO2022006851A1 - Procédé de communication sans fil, dispositif terminal et dispositif réseau - Google Patents

Procédé de communication sans fil, dispositif terminal et dispositif réseau Download PDF

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Publication number
WO2022006851A1
WO2022006851A1 PCT/CN2020/101325 CN2020101325W WO2022006851A1 WO 2022006851 A1 WO2022006851 A1 WO 2022006851A1 CN 2020101325 W CN2020101325 W CN 2020101325W WO 2022006851 A1 WO2022006851 A1 WO 2022006851A1
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WO
WIPO (PCT)
Prior art keywords
random access
ssb
prach
terminal device
ros
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Application number
PCT/CN2020/101325
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English (en)
Chinese (zh)
Inventor
胡奕
李海涛
Original Assignee
Oppo广东移动通信有限公司
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.)
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Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to CN202080100521.8A priority Critical patent/CN115486194A/zh
Priority to PCT/CN2020/101325 priority patent/WO2022006851A1/fr
Publication of WO2022006851A1 publication Critical patent/WO2022006851A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • 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 communication, and more particularly, to a wireless communication method, a terminal device, and a network device.
  • the number of repeated transmissions of the incoming preamble sequence is the same, which will inevitably cause the success rate of the low-capacity terminal equipment to send the random access preamble to be lower than the success rate of the common terminal equipment to send the random access preamble.
  • the embodiments of the present application provide a wireless communication method, terminal device and network device, so that the success rate of sending random access preambles by low-capability terminal devices can be guaranteed to be close to that of common terminal devices in sending random access preambles.
  • a wireless communication method includes: a terminal device sends a random access preamble using a first random access preamble format matching the type or capability of the terminal device.
  • a wireless communication method comprising: a terminal device determining a PRACH timing association period of a physical random access channel according to the number of repeated transmissions corresponding to a random access preamble and a random access channel configuration parameter; wherein the PRACH The opportunity association period is at least one PRACH configuration period occupied when each SSB in the at least one synchronization signal block SSB is mapped to different time domain random access opportunities RO at least R times, where R is the number of repeated transmissions.
  • a third aspect provides a wireless communication method, the method comprising: a network device sending a first configuration parameter to a terminal device; wherein the first configuration parameter is used to indicate multiple random access preamble formats, different random access The preamble format corresponds to the repeated transmission times of different random access preamble sequences; the first random access preamble format indicated by the first configuration parameter matches the type or capability of the terminal device.
  • a fourth aspect provides a wireless communication method, the method comprising: a network device sending a random access channel configuration parameter to a terminal device, the random access channel configuration parameter and the number of repeated transmissions corresponding to the random access preamble and the random access
  • the channel configuration parameter is used to determine the PRACH opportunity association period; wherein, the PRACH opportunity association period is at least one PRACH configuration period occupied when each SSB in the at least one SSB is mapped to a different time domain RO at least R times, and R is the repetition number of transfers.
  • a terminal device configured to execute the method in the above-mentioned first aspect or each implementation manner thereof.
  • the terminal device includes a functional module for executing the method in the above-mentioned first aspect or each implementation manner thereof.
  • a terminal device for executing the method in the second aspect or each of its implementations.
  • the terminal device includes a functional module for executing the method in the second aspect or each implementation manner thereof.
  • a network device for executing the method in the third aspect or each of its implementations.
  • the network device includes functional modules for executing the methods in the third aspect or each of its implementations.
  • a network device for executing the method in the fourth aspect or each of its implementations.
  • the network device includes a functional module for executing the method in the fourth aspect or each implementation manner thereof.
  • a terminal device including a processor and a memory.
  • the memory is used for storing a computer program
  • the processor is used for calling and running the computer program stored in the memory to execute the method in the above-mentioned first aspect or each implementation manner thereof.
  • 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 to execute the method in the second aspect or each of 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 third aspect or each of its implementations.
  • a twelfth aspect provides 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 fourth aspect or each of its implementations.
  • an apparatus for implementing any one of the above-mentioned first to fourth aspects or the method in each implementation manner thereof.
  • the apparatus includes: a processor for calling and running a computer program from a memory, so that a device installed with the apparatus executes any one of the above-mentioned first to fourth aspects or each of its implementations method.
  • a computer-readable storage medium for storing a computer program, the computer program causing a computer to execute the method in any one of the above-mentioned first to fourth aspects or the respective implementations thereof.
  • a computer program product comprising computer program instructions, the computer program instructions cause a computer to execute the method in any one of the above-mentioned first to fourth aspects or the implementations thereof.
  • a sixteenth aspect provides a computer program that, when run on a computer, causes the computer to perform the method in any one of the above-mentioned first to fourth aspects or the respective implementations thereof.
  • the number of repeated transmissions of the random access preamble of the low-capacity terminal equipment is greater than that of the common-capable terminal equipment, thereby ensuring that the low-capacity terminal equipment is repeatedly transmitted.
  • the success rate of the device sending the random access preamble is close to the success rate of the common terminal device sending the random access preamble.
  • FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • FIG. 2 is an interaction flowchart of a wireless communication method provided by an embodiment of the present application
  • FIG. 3 is a schematic diagram of random access preamble transmission of a low-capability terminal device and a common terminal device according to an embodiment of the present application;
  • FIG. 4 is an interaction flowchart of a wireless communication method provided by another embodiment of the present application.
  • FIG. 5 is a schematic diagram of a first mapping manner provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a first mapping manner provided by another embodiment of the present application.
  • FIG. 7 shows a schematic block diagram of a terminal device 700 according to an embodiment of the present application.
  • FIG. 8 shows a schematic block diagram of a network device 800 according to an embodiment of the present application.
  • FIG. 9 shows a schematic block diagram of a terminal device 900 according to an embodiment of the present application.
  • FIG. 10 shows a schematic block diagram of a network device 1000 according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a communication device 1100 provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a device according to an embodiment of the present application.
  • FIG. 13 is a schematic block diagram of a communication system 1300 provided by an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • Wideband Code Division Multiple Access Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • New Radio Interface New Radio, NR
  • evolution system of NR system LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum on unlicensed spectrum, NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), next-generation communication systems or other communication systems, etc.
  • UMTS Universal Mobile Telecommunication System
  • WLAN Wireless Local Area Networks
  • WiFi Wireless Fidelity
  • next-generation communication systems or other communication systems etc.
  • the communication system in this embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) distribution. web scene.
  • Carrier Aggregation, CA Carrier Aggregation, CA
  • DC Dual Connectivity
  • SA standalone
  • This embodiment of the present application does not limit the applied spectrum.
  • the embodiments of the present application may be applied to licensed spectrum, and may also be applied to unlicensed spectrum.
  • 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 referred to as a communication terminal, a terminal).
  • the network device 110 may provide communication coverage for a particular geographic area, and may communicate with terminal devices located within the coverage area.
  • 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. This application The embodiment does not limit this.
  • the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.
  • a device having a communication function in the network/system may be referred to as a communication device.
  • the communication device may include a network device 110 and a terminal device 120 with a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as other network entities such as a network controller, a mobility management entity, etc., which are not limited in this embodiment of the present application.
  • terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • UE User Equipment
  • access terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • the terminal device can be a station (STAION, ST) in the WLAN, can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, and next-generation communication systems, such as terminal devices in NR networks or Terminal equipment in the future evolved Public Land Mobile Network (Public Land Mobile Network, PLMN) network, etc.
  • STAION, ST in the WLAN
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • a network device can be a device used to communicate with a mobile device.
  • the network device can be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a WCDMA
  • the base station (NodeB, NB) can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or an access point, or a vehicle-mounted device, a wearable device, and a network device or base station in an NR network ( gNB) or network equipment in the future evolved PLMN network, etc.
  • gNB NR network
  • a network device provides services for a cell
  • a terminal device communicates with the network device through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell
  • the cell may be a network device (for example, a frequency domain resource).
  • the cell corresponding to the base station), the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell), where the small cell can include: Metro cell, Micro cell, Pico cell cell), Femto cell, etc.
  • These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-speed data transmission services.
  • the 3rd Generation Partnership Project (3GPP) Radio Access Network (RAN) plenary agreed to study the low-capability NR terminal project.
  • 3GPP 3rd Generation Partnership Project
  • RAN Radio Access Network
  • one of the goals of this project is to study the coverage recovery mechanism of the response to compensate for the loss of coverage performance that may be caused by the reduction of terminal complexity.
  • one of the most intuitive solutions is to use the repeated transmission mechanism, so that the receiving end can receive and combine multiple transmissions, thereby improving the receiving performance.
  • different random access preamble formats correspond to the repeated transmission times of different random access preamble sequences.
  • the network device configures the random access preamble format to terminal equipment in the same cell by broadcasting, it will cause random access corresponding to the low-capability terminal equipment and common terminal equipment.
  • the number of repeated transmissions of the incoming preamble sequence is the same, which will inevitably cause the success rate of the low-capacity terminal equipment to send the random access preamble to be lower than the success rate of the common terminal equipment to send the random access preamble.
  • the terminal device can select a random access preamble format matching its own type or capability to send the random access preamble.
  • the ssb-perRACH-Occasion and CB-PreamblesPerSSB parameters are defined in TS38.331.
  • the ssb-perRACH-Occasion parameter represents the number N of synchronization signal blocks (Synchronization Signal Block, SSB) corresponding to each random access channel opportunity (RACH Occasion, RO), usually the value range of N is [1/8, 16] .
  • CB-PreamblesPerSSB represents the number M of contention-based random access preambles that each SSB can use in one RO.
  • the terminal device instructs N SSBs to associate one RO through the ssb-perRACH-Occation carried in the high-level parameter BeamFailureRecoveryConfig. If N ⁇ 1, one SSB is mapped to 1/N consecutive valid ROs. If N ⁇ 1, then N consecutive SSBs are associated with one RO.
  • downlink broadcast information SSB initial access can also support beam (Beam) management mechanism.
  • Beam beam management mechanism.
  • SSB has multiple transmission opportunities in the time domain period, which can correspond to different beams respectively. Therefore, in NR, only when the beam scanning signal of the SSB "covers" a terminal device, the terminal device has the opportunity to perform random access. That is, the random access channel opportunity (RACH Occasion, RO) needs to establish a mapping relationship with the SSB or the index of the SSB.
  • RACH Occasion, RO the random access channel opportunity
  • the index of SSB (ie SSB) is mapped to RO as follows:
  • association period an association period (association period) is also introduced, which is also called a mapping period, which means how many PRACH configuration periods in the time domain are required after all the SSBs are mapped to the RO.
  • association period starts from frame number 0, and the S SSBs must be mapped to the corresponding RO at least once in the association period.
  • mapping pattern period is defined, including one or more association periods, which is 160ms, and the mapping of RO and SSB is repeated every 160ms.
  • Table 1 is the mapping relationship between the PRACH configuration period and the number of PRACH configuration periods included in the association period.
  • FIG. 2 is an interaction flowchart of a wireless communication method provided by an embodiment of the present application, and the method includes the following steps:
  • Step S210 The terminal device sends the random access preamble using the first random access preamble format matching the type or capability of the terminal device.
  • the network device may send the first configuration parameter to the terminal device.
  • the first configuration parameter is used to indicate multiple random access preamble formats, and different random access preamble formats correspond to different times of repeated transmission of random access preamble sequences.
  • the type of the terminal device corresponds to the capability, for example, the type of the terminal device is a low-capability type or a common type (ie, a common capability type).
  • the types of terminal devices are not limited to the aforementioned low-capability types and common types, for example, three or more types of terminal devices can be set.
  • the capability of the terminal device may be determined according to the capability parameter of the terminal device.
  • the capability parameter includes, but is not limited to, the number of antennas of the terminal device and/or the system bandwidth of the terminal device.
  • the capability parameter may include: a processor performance parameter of the terminal device, and the like.
  • the terminal device when the number of antennas of the terminal device is less than the preset number, it may be considered that the terminal device is a low-capability terminal device. On the contrary, when the number of antennas of the terminal device is greater than or equal to the preset number, the terminal device may be considered as a common terminal device.
  • the terminal device when the system bandwidth of the terminal device is less than the preset bandwidth, the terminal device may be considered as a low-capability terminal device. On the contrary, when the system bandwidth of the terminal device is greater than or equal to the preset bandwidth, the terminal device can be considered as a common terminal device.
  • the terminal device when the number of antennas of the terminal device is less than the preset number, and the system bandwidth of the terminal device is less than the preset bandwidth, it may be considered that the terminal device is a low-capability terminal device. On the contrary, when the number of antennas of the terminal device is greater than or equal to the preset number, and the system bandwidth of the terminal device is greater than or equal to the preset bandwidth, the terminal device can be considered as a common terminal device.
  • the above-mentioned preset bandwidth and preset number can be set according to the actual situation, which is not limited in this application.
  • the capabilities of the terminal device are not limited to the above-mentioned low capabilities and common capabilities, for example, three or more terminal device capabilities can be set.
  • FIG. 3 is a schematic diagram of random access preamble transmission between low-capacity terminal equipment and common terminal equipment provided by an embodiment of the application.
  • the matching random access preamble format X
  • the number of times of repeated transmission of the corresponding random access preamble sequence is 1.
  • the number of repeated transmissions of the random access preamble sequence corresponding to the matched random access preamble format Y is 4.
  • the matched random access preamble format can use the random access preamble format currently supported by NR Rel-16, or of course, design a new random access preamble format. Used to match low-capacity end devices.
  • the matching random access preamble format can also use the random access preamble format currently supported by NR Rel-16, and of course, it can also be used to design a new random access preamble format. to match common terminal equipment.
  • the network device may configure the prach-ConfigurationIndex and prach-ConfigurationIndex1 parameters.
  • the prach-ConfigurationIndex is associated with the existing RACH configuration table of the current NR Rel-16 version, which is used for the terminal equipment with ordinary capabilities to obtain its corresponding RACH time domain resource configuration and random access preamble format.
  • the prach-ConfigurationIndex1 is associated with a new RACH configuration table, which is used by a low-capability terminal device to obtain its corresponding RACH time domain resource configuration and random access preamble format.
  • the prach-ConfigurationIndex is associated with the existing RACH configuration table of the current NR Rel-16 version, which is used by the low-capability terminal device to obtain its corresponding RACH time domain resource configuration and random access preamble format.
  • the prach-ConfigurationIndex1 is associated with a new RACH configuration table, which is used by a terminal device with ordinary capabilities to obtain its corresponding RACH time domain resource configuration and random access preamble format.
  • the terminal device can use the first random access preamble format matching its own type or capability to send the random access preamble, and different random access preambles correspond to different repeated transmission times, based on
  • the number of repeated transmissions of the random access preamble of the low-capacity terminal equipment is larger than that of the common-capable terminal equipment, so that the success rate of the random access preamble sent by the low-capacity terminal equipment can be guaranteed to be the same as that of the common terminal equipment.
  • the success rate of sending random access preambles by common terminal equipment is close.
  • FIG. 4 is an interaction flowchart of a wireless communication method provided by another embodiment of the present application, and the method includes the following steps:
  • Step S410 the network device sends PRACH configuration parameters to the terminal device.
  • Step S420 The terminal device determines the PRACH occasion association period according to the number of repeated transmissions corresponding to the random access preamble and the PRACH configuration parameter.
  • the PRACH configuration parameters include: a PRACH configuration index, a starting position of a frequency domain resource of each time domain RO, a frequency division multiplexing coefficient, the number of SSBs included in each RO, and each SSB can be used for competitive randomization.
  • the PRACH configuration index is associated with the format of the random access preamble, the PRACH configuration period, the subframe where the PRACH is located, the time slot, the symbol, and the time length of the PRACH.
  • the PRACH configuration index may be prach-ConfigurationIndex.
  • the formats of the random access preambles of terminal devices of different types or capabilities may be different, for example: as shown in FIG. 3 , for common capability terminal devices, the matched random access preamble format is the random access preamble. Format X; for low-capability terminal equipment, the matched random access preamble format is random access preamble format Y.
  • the distribution of ROs in the time domain can be determined through the PRACH configuration index.
  • the frequency domain RO resource position can be determined by the starting position of the frequency domain resource of each time domain RO, such as msg1-FrequencyStart, and the frequency division multiplexing coefficient such as msg1-FDM.
  • msg1-FrequencyStart the frequency division multiplexing coefficient
  • one RO corresponds to a continuous physical resource block (Physical Resource Block). Block, PRB).
  • Physical Resource Block Physical Resource Block
  • the terminal device may repeatedly send the random access preamble to the network device, and the number of times of repeated transmission of the random access preamble is R.
  • the repeated transmission in this application includes the first transmission and the subsequent repeated transmission.
  • the PRACH opportunity association period is at least one PRACH configuration period occupied when each SSB in the at least one SSB is mapped to different time domain ROs at least R times, and R is the number of repeated transmissions.
  • the PRACH occasion association period is an integer multiple of the PRACH configuration period.
  • the terminal device may also determine the first mapping manner of at least one SSB to RO within the PRACH opportunity association period.
  • the first mapping manner includes: a mapping manner of SSB to RO in multiple repeated transmissions, wherein the mapping manner of SSB to RO in each repeated transmission is at least one mapping manner of SSB to RO.
  • the index of at least one SSB is mapped to the RO as follows:
  • the first mapping method is: firstly traverse all SSB-to-RO mappings for one repeated transmission, and then traverse all SSB-to-RO mappings for the next repeated transmission, and so on.
  • the method for the terminal device to determine the first mapping mode in each PRACH opportunity association period is: traverse all the mappings from SSBs to ROs for the first repeated transmission, and the specific mapping sequence is: in each RO according to random access
  • the index of the preamble is incremented.
  • the index of the RO in the frequency domain is incremented.
  • the indexes of the multiple time-domain ROs are incremented.
  • FIG. 5 is a schematic diagram of a first mapping manner provided by an embodiment of the application.
  • the number of transmissions is 2.
  • the mapping of SSB1-8 to each RO is included.
  • the mapping of SSB1-8 to each RO is also included.
  • the indices of SSB1-8 are mapped to ROs in the following manner: the indices of the random access preambles are incremented in each RO. In the case of frequency division multiplexing, the index of the RO in the frequency domain is incremented.
  • the SSB1 and the SSB2 are respectively mapped in the frequency domain from low to high.
  • the frequency domain is mapped from low to high with SSB3 and SSB4, respectively.
  • the indexes of the multiple time-domain ROs are incremented.
  • SSB1-2 is mapped on the first time domain RO
  • SSB3-4 is mapped on the second time domain RO.
  • the index of the SSB increases with the index of the time slot.
  • the index of the SSB also increases with the index of the time slot. .
  • the last two ROs in the PRACH association period are invalid ROs and will not be used for sending the random access preamble. It can also be determined from FIG. 5 that there are two mappings from all SSBs to ROs in different time domains in the PRACH association period.
  • the first mapping manner includes: a mapping manner from SSBs to ROs on multiple ROs, wherein the mapping relationship from SSBs to ROs on every R consecutive ROs starting from the first RO in the multiple ROs is: The same mapping relationship between SSB and RO, and the indexes of the corresponding SSBs on the adjacent two groups of R consecutive ROs are incremented according to the increasing order of RO in the time domain.
  • the index of the SSB is mapped to the RO as follows:
  • the first mapping method is: in each PRACH opportunity association period, first complete the mapping from SSB to RO on a time domain RO according to the order of the SSB index, and the time domain RO is mapped first. After the mapping method is repeated R times, the mapping from SSB to R0 is continued for the next time domain RO, and so on.
  • the method for the terminal device to determine the first mapping mode in each PRACH opportunity association period is: complete the mapping from SSB to RO for the first time domain RO, and the specific mapping sequence is: according to the index of the random access preamble. Incrementing, in the case of frequency division multiplexing, it is incremented according to the index of the RO in the frequency domain.
  • the mapping method from SSB to RO is the same as the mapping method on the first RO.
  • the mapping method of the SSB to the RO is the same as the mapping method on the R+1 th time domain.
  • R mappings of all N SSBs to ROs in different time domains within the PRACH association period may be determined, where N is greater than or equal to 1.
  • FIG. 6 is a schematic diagram of a first mapping manner provided by another embodiment of the present application.
  • the number of repeated transmissions is 2.
  • the mapping of SSB1 and SSB2 to the first RO is included.
  • the mapping of SSB1 and SSB2 to the second RO is repeated.
  • the index of the SSB is mapped to the RO in the following manner: the index of the random access preamble is incremented in each RO.
  • the index of the RO in the frequency domain is incremented.
  • the SSB1 and the SSB2 are respectively mapped in the frequency domain from low to high.
  • the frequency domain is mapped from low to high with SSB3 and SSB4, respectively.
  • the last two ROs in the PRACH association period are invalid ROs and will not be used for sending the random access preamble. It can also be determined from FIG. 6 that there are two mappings from all SSBs to ROs in different time domains in the PRACH association period.
  • the present application also provides the concept of PRACH transmission opportunity, wherein the terminal device can determine the PRACH transmission opportunity of each SSB in at least one SSB in the PRACH opportunity association period according to the first mapping manner. For each SSB, the PRACH transmission opportunity starts from mapping the SSB to the first time domain RO, and R is the number of repeated transmissions for every R consecutive time domain ROs. Based on this, each PRACH occasion association period includes N PRACH transmission occasions for each SSB.
  • the ROs included in the PRACH transmission occasion are all in the same frequency domain.
  • the PRACH transmission opportunities of SSB1 and SSB2 are both the first time domain RO and the fifth time domain RO
  • the PRACH transmission opportunities of SSB3 and SSB4 are both the second time domain RO and the fifth time domain RO.
  • the six time domain ROs, the PRACH transmission opportunities of SSB5 and SSB6 are the third time domain RO and the seventh time domain RO
  • the PRACH transmission opportunities of SSB7 and SSB8 are the fourth time domain RO and the eighth time domain.
  • one PRACH opportunity association period includes one PRACH transmission opportunity for each SSB.
  • the PRACH transmission opportunities of SSB1 and SSB2 are both the first time domain RO and the second time domain RO
  • the PRACH transmission opportunities of SSB3 and SSB4 are both the third time domain RO and the second time domain RO.
  • the PRACH transmission opportunities of the four time domains RO, SSB5 and SSB6 are the fifth time domain RO and the sixth time domain RO
  • the PRACH transmission opportunities of SSB7 and SSB8 are the seventh time domain RO and the eighth time domain.
  • one PRACH opportunity association period includes one PRACH transmission opportunity for each SSB.
  • the terminal device may repeatedly send the random access preamble on the PRACH transmission opportunity corresponding to the selected SSB in at least one SSB.
  • the SSB selected by a terminal device is SSB1
  • the terminal device repeatedly sends the random access preamble on the first time domain RO and the fifth time domain RO.
  • the terminal device repeatedly sends the random access preamble on the first time domain RO and the second time domain RO.
  • the present application provides a method of how to determine the PRACH timing association period, the mapping relationship between RO and SSB, and the PRACH transmission timing of each SSB when the random access preamble is repeatedly transmitted.
  • FIG. 7 shows a schematic block diagram of a terminal device 700 according to an embodiment of the present application.
  • the terminal device 700 includes: a processing unit 710 configured to send a random access preamble using a first random access preamble format matching the type or capability of the terminal device.
  • the method further includes: a communication unit 720, configured to receive the first configuration parameter from the network device.
  • the first configuration parameter is used to indicate multiple random access preamble formats, and different random access preamble formats correspond to different repeated transmission times of the random access preamble sequence.
  • the type of the terminal device corresponds to the capability, and the stronger the capability of the terminal device is, the less the number of repeated transmissions corresponding to the matched first random access preamble format.
  • the type or capability of the terminal device is determined according to a capability parameter of the terminal device.
  • the capability parameter includes: the number of antennas of the terminal device and/or the system bandwidth of the terminal device.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the aforementioned processing unit may be one or more processors.
  • the terminal device 700 may correspond to the terminal device in the method embodiment corresponding to FIG. 2 of the present application, and the above-mentioned and other operations and/or functions of the various units in the terminal device 700 are respectively for the purpose of realizing the above-mentioned
  • the corresponding process of the terminal device in the method embodiment corresponding to FIG. 2 is not repeated here for brevity.
  • FIG. 8 shows a schematic block diagram of a network device 800 according to an embodiment of the present application.
  • the network device 800 includes: a communication unit 810 configured to send the first configuration parameter to the terminal device.
  • the first configuration parameter is used to indicate multiple random access preamble formats, and different random access preamble formats correspond to different repeated transmission times of the random access preamble sequence.
  • the first random access preamble format indicated by the first configuration parameter matches the type or capability of the terminal device.
  • the type of the terminal device corresponds to the capability, and the stronger the capability of the terminal device is, the less the number of repeated transmissions corresponding to the matched first random access preamble format.
  • the type or capability of the terminal device is determined according to a capability parameter of the terminal device.
  • the capability parameter includes: the number of antennas of the terminal device and/or the system bandwidth of the terminal device.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the aforementioned processing unit may be one or more processors.
  • the network device 800 may correspond to the network device in the method embodiment of the present application corresponding to FIG. 2 , and the above and other operations and/or functions of the various units in the network device 800 are to achieve the above
  • the corresponding flow of the network device in the method embodiment corresponding to FIG. 2 is omitted here for brevity.
  • FIG. 9 shows a schematic block diagram of a terminal device 900 according to an embodiment of the present application.
  • the terminal device 900 includes: a processing unit 910 configured to determine the PRACH occasion association period according to the number of repeated transmissions corresponding to the random access preamble and the random access channel configuration parameter.
  • the PRACH opportunity association period is at least one PRACH configuration period occupied when each SSB in the at least one SSB is mapped to different time domain ROs at least R times, and R is the number of repeated transmissions.
  • the PRACH occasion association period is an integer multiple of the PRACH configuration period.
  • the processing unit 910 is further configured to determine the first mapping manner of at least one SSB to the RO in the PRACH occasion association period.
  • the first mapping manner includes: a mapping manner of SSB to RO in multiple repeated transmissions, wherein the mapping manner of SSB to RO in each repeated transmission is at least one mapping manner of SSB to RO.
  • the index of at least one SSB is mapped to the RO as follows: the index of the random access preamble is incremented in each RO. In the case of frequency division multiplexing, the index of the RO in the frequency domain is incremented.
  • the indexes of the multiple time-domain ROs are incremented. Incremented by the index of the PRACH slot.
  • the first mapping manner includes: a mapping manner from SSB to RO on multiple ROs, wherein the mapping relationship from SSB to RO on every R consecutive ROs starting from the first RO in the multiple ROs is the same
  • the mapping relationship between the SSB and the RO, and the indexes of the corresponding SSBs on the adjacent two groups of R consecutive ROs are incremented according to the increasing order of the ROs in the time domain.
  • the index of the SSB is mapped to the RO as follows: incremented by the index of the random access preamble. In the case of frequency division multiplexing, the index of the RO in the frequency domain is incremented.
  • the processing unit 910 is further configured to determine the PRACH transmission opportunity of each SSB in the at least one SSB within the PRACH opportunity association period according to the first mapping manner.
  • the PRACH transmission opportunity starts from mapping the SSB to the first time domain RO, and R is the number of repeated transmissions for every R consecutive time domain ROs.
  • the method further includes: a communication unit 920, configured to repeatedly send the random access preamble on the PRACH transmission occasion corresponding to the selected SSB in the at least one SSB.
  • a communication unit 920 configured to repeatedly send the random access preamble on the PRACH transmission occasion corresponding to the selected SSB in the at least one SSB.
  • the random access channel configuration parameters include: a PRACH configuration index, a starting position of a frequency domain resource of each time domain RO, a frequency division multiplexing coefficient, the number of SSBs included in each RO, and each SSB can be used for The number of random access preambles and the number of repeated transmissions in the competitive random access process.
  • the PRACH configuration index is associated with the format of the random access preamble, the PRACH configuration period, the subframe where the PRACH is located, the time slot, the symbol, and the time length of the PRACH.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the aforementioned processing unit may be one or more processors.
  • the terminal device 900 may correspond to the terminal device in the method embodiment corresponding to FIG. 4 of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 900 are respectively for the purpose of realizing the above-mentioned
  • the corresponding flow of the terminal device in the method embodiment corresponding to FIG. 4 is not repeated here for brevity.
  • FIG. 10 shows a schematic block diagram of a network device 1000 according to an embodiment of the present application.
  • the network device 1000 includes: a communication unit 1010 for sending random access channel configuration parameters, the random access channel configuration parameters and the number of repeated transmissions corresponding to the random access preamble and random access to the terminal device
  • the channel configuration parameter is used to determine the PRACH occasion association period.
  • the PRACH opportunity association period is at least one PRACH configuration period occupied when each SSB in the at least one SSB is mapped to different time domain ROs at least R times, and R is the number of repeated transmissions.
  • the PRACH occasion association period is an integer multiple of the PRACH configuration period.
  • the first mapping manner includes: a mapping manner of SSB to RO in multiple repeated transmissions, wherein the mapping manner of SSB to RO in each repeated transmission is at least one mapping manner of SSB to RO.
  • the index of at least one SSB is mapped to the RO as follows: the index of the random access preamble is incremented in each RO. In the case of frequency division multiplexing, the index of the RO in the frequency domain is incremented.
  • the indexes of the multiple time-domain ROs are incremented. Incremented by the index of the PRACH slot.
  • the first mapping manner includes: a mapping manner from SSB to RO on multiple ROs, wherein the mapping relationship from SSB to RO on every R consecutive ROs starting from the first RO in the multiple ROs is the same
  • the mapping relationship between the SSB and the RO, and the indexes of the corresponding SSBs on the adjacent two groups of R consecutive ROs are incremented according to the increasing order of the ROs in the time domain.
  • the index of the SSB is mapped to the RO as follows: incremented by the index of the random access preamble. In the case of frequency division multiplexing, the index of the RO in the frequency domain is incremented.
  • the PRACH occasion association period includes the PRACH transmission occasion of each SSB in the at least one SSB.
  • the PRACH transmission opportunity starts from mapping the SSB to the first time domain RO, and R is the number of repeated transmissions for every R consecutive time domain ROs.
  • the communication unit 1010 is further configured to receive the random access preamble repeatedly sent by the terminal device.
  • the random access channel configuration parameters include: a PRACH configuration index, a starting position of a frequency domain resource of each time domain RO, a frequency division multiplexing coefficient, the number of SSBs included in each RO, and each SSB can be used for The number of random access preambles and the number of repeated transmissions in the competitive random access process.
  • the PRACH configuration index is associated with the format of the random access preamble, the PRACH configuration period, the subframe where the PRACH is located, the time slot, the symbol, and the time length of the PRACH.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the aforementioned processing unit may be one or more processors.
  • the network device 1000 may correspond to the network device in the method embodiment of the present application corresponding to FIG. 4 , and the above-mentioned and other operations and/or functions of each unit in the network device 1000 are to achieve the above-mentioned
  • the corresponding flow of the network device in the method embodiment corresponding to FIG. 4 is not repeated here for brevity.
  • FIG. 11 is a schematic structural diagram of a communication device 1100 provided by an embodiment of the present application.
  • the communication device 1100 shown in FIG. 11 includes a processor 1110, and the processor 1110 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the communication device 1100 may further include a memory 1120 .
  • the processor 1110 may call and run a computer program from the memory 1120 to implement the methods in the embodiments of the present application.
  • the memory 1120 may be a separate device independent of the processor 1110, or may be integrated in the processor 1110.
  • the communication device 1100 may further include a transceiver 1130, and the processor 1110 may control the transceiver 1130 to communicate with other devices, specifically, may send information or data to other devices, or receive other devices Information or data sent by a device.
  • the processor 1110 may control the transceiver 1130 to communicate with other devices, specifically, may send information or data to other devices, or receive other devices Information or data sent by a device.
  • the transceiver 1130 may include a transmitter and a receiver.
  • the transceiver 1130 may further include an antenna, and the number of the antenna may be one or more.
  • the communication device 1100 may specifically be the network device of the embodiment of the present application, and the communication device 1100 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application. For brevity, details are not repeated here. .
  • the communication device 1100 may specifically be the terminal device of the embodiment of the present application, and the communication device 1100 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application, which is not repeated here for brevity .
  • FIG. 12 is a schematic structural diagram of an apparatus according to an embodiment of the present application.
  • the apparatus 1200 shown in FIG. 12 includes a processor 1210, and the processor 1210 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the apparatus 1200 may further include a memory 1220 .
  • the processor 1210 may call and run a computer program from the memory 1220 to implement the methods in the embodiments of the present application.
  • the memory 1220 may be a separate device independent of the processor 1210, or may be integrated in the processor 1210.
  • the apparatus 1200 may further include an input interface 1230 .
  • the processor 1210 can control the input interface 1230 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.
  • the apparatus 1200 may further include an output interface 1240 .
  • the processor 1210 may control the output interface 1240 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.
  • the apparatus can be applied to the network equipment in the embodiments of the present application, and the apparatus can implement the corresponding processes implemented by the network equipment in the various methods of the embodiments of the present application, which are not repeated here for brevity.
  • the apparatus may be applied to the terminal equipment in the embodiments of the present application, and the apparatus may implement the corresponding processes implemented by the terminal equipment in each method of the embodiments of the present application, which will not be repeated here for brevity.
  • the device mentioned in the embodiment of the present application may also be a chip.
  • it can be a system-on-chip, a system-on-a-chip, a system-on-a-chip, or a system-on-a-chip.
  • FIG. 13 is a schematic block diagram of a communication system 1300 provided by an embodiment of the present application. As shown in FIG. 13 , the communication system 1300 includes a terminal device 1310 and a network device 1320 .
  • the terminal device 1310 can be used to implement the corresponding functions implemented by the terminal device in the method corresponding to FIG. 2
  • the network device 1320 can be used to implement the corresponding functions implemented by the network device or the base station in the method corresponding to FIG. 2 .
  • the functions will not be repeated here.
  • the terminal device 1310 may be used to implement the corresponding functions implemented by the terminal device in the method corresponding to FIG. 4
  • the network device 1320 may be used to implement the corresponding functions implemented by the network device or the base station in the method corresponding to FIG. 4 .
  • the functions will not be repeated here.
  • the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Programming logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • 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 conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in this 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 Read-Only Memory (ROM), Programmable Read-Only Memory (Programmable ROM, PROM), Erasable Programmable Read-Only Memory (Erasable PROM, EPROM), electrically programmable Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be Random Access Memory (RAM), which acts as an external cache.
  • RAM Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, 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 (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.
  • Embodiments of the present application further provide a computer-readable storage medium for storing a computer program.
  • the computer-readable storage medium can be applied to the network device or the base station in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device or the base station in each method of the embodiments of the present application, in order to It is concise and will not be repeated here.
  • the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application. , and are not repeated here for brevity.
  • Embodiments of the present application also provide a computer program product, including computer program instructions.
  • the computer program product can be applied to the network device or the base station in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device or the base station in each method of the embodiments of the present application, for the sake of brevity. , and will not be repeated here.
  • the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, For brevity, details are not repeated here.
  • the embodiments of the present application also provide a computer program.
  • the computer program can be applied to the network device or the base station in the embodiments of the present application, and when the computer program runs on the computer, the computer can execute the corresponding methods implemented by the network device or the base station in each method of the embodiments of the present application.
  • the process for the sake of brevity, will not be repeated here.
  • the computer program may be applied to the mobile terminal/terminal device in the embodiments of the present application, and when the computer program is run on the computer, the mobile terminal/terminal device implements the various methods of the computer program in the embodiments of the present application.
  • the corresponding process for the sake of brevity, will not be repeated here.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • 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 execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de communication sans fil, un dispositif terminal et un dispositif réseau. Le procédé comprend les étapes suivantes : un dispositif terminal envoie un préambule d'accès aléatoire à l'aide d'un premier format de préambule d'accès aléatoire qui correspond au type ou à la capacité du dispositif terminal. Par conséquent, il peut être garanti que le taux de réussite d'envoi d'un préambule d'accès aléatoire au moyen d'un dispositif terminal de faible capacité est approximativement identique au taux de réussite de l'envoi d'un préambule d'accès aléatoire au moyen d'un dispositif terminal commun.
PCT/CN2020/101325 2020-07-10 2020-07-10 Procédé de communication sans fil, dispositif terminal et dispositif réseau WO2022006851A1 (fr)

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PCT/CN2020/101325 WO2022006851A1 (fr) 2020-07-10 2020-07-10 Procédé de communication sans fil, dispositif terminal et dispositif réseau

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WO2023143363A1 (fr) * 2022-01-26 2023-08-03 展讯半导体(南京)有限公司 Procédé et appareil de communication
WO2023207446A1 (fr) * 2022-04-27 2023-11-02 深圳市中兴微电子技术有限公司 Procédé de détermination d'opportunité de transmission prach, ue et support de stockage lisible par ordinateur
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WO2025031316A1 (fr) * 2023-08-09 2025-02-13 展讯半导体(南京)有限公司 Procédé et appareil de communication, et support de stockage

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