WO2021026931A1 - Procédé et dispositif de détermination de ressources d'accès aléatoire - Google Patents

Procédé et dispositif de détermination de ressources d'accès aléatoire Download PDF

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Publication number
WO2021026931A1
WO2021026931A1 PCT/CN2019/100886 CN2019100886W WO2021026931A1 WO 2021026931 A1 WO2021026931 A1 WO 2021026931A1 CN 2019100886 W CN2019100886 W CN 2019100886W WO 2021026931 A1 WO2021026931 A1 WO 2021026931A1
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WIPO (PCT)
Prior art keywords
uplink channel
channel resource
preamble
preambles
sets
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PCT/CN2019/100886
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English (en)
Chinese (zh)
Inventor
柴晓萌
吴艺群
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201980099344.3A priority Critical patent/CN114246012A/zh
Priority to PCT/CN2019/100886 priority patent/WO2021026931A1/fr
Publication of WO2021026931A1 publication Critical patent/WO2021026931A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • This application relates to the field of communication technology, and in particular to a method and device for determining random access resources.
  • UE user equipment
  • RRC Radio Resource Control
  • URLLC ultra-reliable and low latency communications
  • mMTC machine type communications
  • the industry has proposed a two-step random access procedure.
  • the first step the UE sends the random access preamble and data simultaneously in the first step.
  • Step 2 The base station sends a random access response to the UE.
  • the random access preamble and data are sent in the same message, and the physical random access channel (physical random access channel, PRACH) and the physical uplink shared channel (physical uplink shared channel, PUSCH)
  • PRACH physical random access channel
  • PUSCH physical uplink shared channel
  • the base station can configure multiple sets of PUSCH resources Configuration, each set of PUSCH resource configuration includes one or more of MCS, TBS, PUSCH time domain resource configuration, PUSCH frequency domain resource configuration, repeated transmission configuration, demodulation reference signal (DMRS) configuration, different PUSCH
  • the resource configuration MCS, TBS, the number of repeated transmissions, and the time-frequency resource location and time-frequency resource size of each PUSCH can be the same or different.
  • the UE selects a set of PUSCH resource configurations according to its own needs and transmits on the corresponding PUSCH resources data. However, when multiple sets of PUSCH resource configurations are configured in two-step random access, how does the terminal device determine the random access resources so that the network device knows which PUSCH resource configuration the terminal device uses.
  • the embodiments of the present application provide a method and device for determining random access resources, which are used to solve the problem of how a terminal device determines random access resources when multiple sets of PUSCH resource configurations are configured in two-step random access in the prior art.
  • the problem of making the network device know which PUSCH resource configuration the terminal device adopts.
  • an embodiment of the present application provides a method for determining random access resources.
  • the method includes: a communication device associates a synchronization signal block with a multiple of each random access time-frequency resource according to N sets of uplink channel resource configurations.
  • the preambles are divided into N groups, where N is an integer greater than 1, and the N groups of preambles correspond to N sets of uplink channel resource configurations one-to-one.
  • the communication device determines the target uplink channel resource configuration in the N sets of uplink channel resource configurations, and determines a preamble in the preamble group corresponding to the target uplink channel resource configuration.
  • the network device may not need to explicitly configure the preamble grouping information for multiple sets of PUSCH resources.
  • the terminal device may group the preamble sets to be grouped according to the N sets of PUSCH resource configurations, and each set of preambles and one set of PUSCH resource configurations Mapping can save the signaling overhead of configuring preamble packet information.
  • the communication device when the communication device divides the multiple preambles on each random access time-frequency resource associated with the synchronization signal block into N groups according to N sets of uplink channel resource configurations, it can be specifically based on N sets of uplink channel resource configurations.
  • the number of uplink channel resource units configured by the channel resource configuration and the total number of multiple preambles determine the number of preambles corresponding to each set of uplink channel resource configuration, and the number of preambles corresponding to each of the N sets of uplink channel resource configurations will be multiple
  • the preamble is divided into N groups.
  • the uplink channel resource unit is an uplink channel time-frequency resource, or the uplink channel resource unit is a combination of an uplink channel time-frequency resource and a demodulation reference signal port, or the uplink channel resource unit is an uplink channel time-frequency resource And a combination of a demodulation reference signal sequence, or the uplink channel resource unit is a combination of an uplink channel time-frequency resource, a demodulation reference signal port, and a demodulation reference signal sequence.
  • the terminal device can configure the number of uplink channel resource units separately according to N sets of uplink channel resource configurations, so that the uplink channel resource units associated with each preamble are relatively uniform, thereby reducing the probability of resource collision.
  • the communication device determines the number of preambles corresponding to each set of uplink channel resource configurations according to the number of uplink channel resource units respectively configured by the N sets of uplink channel resource configurations and the total number of multiple preambles, it can be specifically
  • the number of preambles corresponding to each set of uplink channel resource configurations is determined according to the number of uplink channel resource units configured in each set of uplink channel resource configurations in the first time period and the total number of multiple preambles in the N sets of uplink channel resource configurations.
  • the rationality of the association between the preamble and the uplink channel resource configuration can be improved, the accuracy of the grouping can be reduced, and the The probability of resource collision.
  • the communication device determines each uplink channel resource unit according to the number of uplink channel resource units configured in each uplink channel resource configuration in the first time period and the total number of multiple preambles in the N uplink channel resource configurations.
  • the number of preambles corresponding to the channel resource configuration specifically for each set of uplink channel resource configuration, determine the number of uplink channel resource units configured in the first time period and the N sets of uplink channel resource configuration in the first time
  • the ratio of the total number of uplink channel resource units configured in the segment, and the number of preambles corresponding to the uplink channel resource configuration is determined as the result of multiplying the total number of multiple preambles and the ratio.
  • the number of corresponding preambles is determined according to the ratio of each set of uplink channel resource allocation to the total number of uplink channel resource units, and the preamble can be more evenly associated with the uplink channel resource units, thereby reducing the probability of preamble collision.
  • the first time period may refer to the period of the PRACH time-frequency resource, may also be the period of the PUSCH time-frequency resource, or may be the msgA mapping period, that is, the mapping period of the preamble and PUSCH resource units.
  • the first time period may also be predefined or configured by the network device.
  • the communication device can also determine each set according to the average number of uplink channel resource units configured in each set of uplink channel resource configurations in the N sets of uplink channel resource configurations and the total number of multiple preambles. The number of preambles corresponding to the uplink channel resource configuration.
  • the terminal equipment determines the number of preambles corresponding to each set of uplink channel resource configurations according to the average number of uplink channel resource units configured for each set of uplink channel resource configurations per unit time, which can make the preamble and the uplink channel resource configuration association relationship It is more reasonable, which can reduce the probability of preamble collision.
  • the communication device determines each set of uplink channels according to the average number of uplink channel resource units configured in each set of uplink channel resource configurations in the N sets of uplink channel resource configurations and the total number of multiple preambles.
  • the number of preambles corresponding to the resource configuration specifically: For each set of uplink channel resource configuration, determine the number of uplink channel resource units per unit time and N sets of uplink channel resource configuration per unit time uplink channel resource units It is determined that the number of preambles corresponding to the uplink channel resource configuration is the result of multiplying the total number of multiple preambles and the ratio.
  • the number of corresponding preambles is determined according to the ratio of each set of uplink channel resources to the total number of configured uplink channel resource units per unit time, which can make the number of preambles associated with the uplink channel resource configuration more reasonable and the preamble resources more uniform. Thereby, the probability of preamble collision can be reduced.
  • the communication device when the communication device divides the multiple preambles on each random access time-frequency resource associated with the synchronization signal block into N groups according to N sets of uplink channel resource configurations, it can be specifically based on the uplink channel resource The total number of configurations N and the total number of multiple preambles divide the multiple preambles into N groups evenly.
  • the terminal device divides the preambles into N groups evenly according to the total number of uplink channel resource configurations, which can reduce the computational complexity and save computational resources.
  • an embodiment of the present application provides a method for determining random access resources.
  • the method includes: a communication device receives N sets of uplink channel resource configurations, and associates multiple preambles with the N sets of uplink resources in a preset order.
  • each set of uplink channel resource configuration is used to configure one or more uplink channel resource units, and the uplink channel resource unit is an uplink channel time-frequency resource, or an uplink channel resource unit It is a combination of an uplink channel time-frequency resource and a demodulation reference signal port, or an uplink channel resource unit is a combination of an uplink channel time-frequency resource and a demodulation reference signal sequence, or an uplink channel resource unit is an uplink channel A combination of time-frequency resources, a demodulation reference signal port, and a demodulation reference signal sequence, where N is an integer greater than 1.
  • the network device may not need to explicitly configure preamble grouping information for multiple sets of PUSCH resources, and the terminal device may map multiple sets of PUSCH resources with the preamble in a preset first order, and each preamble after mapping They are uniquely mapped to a set of PUSCH resource units of PUSCH resource configuration.
  • the terminal device determines which preamble to choose according to the target PUSCH resource configuration selected by itself, and the terminal device can notify the network device which set of PUSCH resource configuration it uses through the preamble.
  • the multiple preambles can be grouped in ascending order of the preamble sequence number.
  • One is associated with the uplink channel resource unit configured by the N sets of uplink channel resource configurations.
  • the terminal device sequentially maps the preamble to the uplink channel resource unit, so that the network device can determine which set of PUSCH resources the terminal device uses according to the association relationship between the preamble and the uplink channel resource unit.
  • the preset first order can be related to any one of the following four types of information, or a combination of any two, or any three, or a combination of four: DMRS port number , DMRS sequence number, frequency domain resource sequence number of PUSCH resource unit, time domain resource sequence number of PUSCH resource unit, PUSCH resource configuration sequence number where PUSCH resource unit is located.
  • the terminal device can associate the preamble with the PUSCH resource unit in ascending order of the DMRS port sequence number, or the ascending sequence of the DMRS sequence number, or the time domain resource sequence number of the PUSCH resource unit in ascending order, or the timing of the PUSCH resource unit.
  • the domain resource sequence number is in ascending order, or the PUSCH resource configuration sequence number corresponding to the PUSCH resource unit is associated in ascending order.
  • the terminal equipment is associated according to certain rules, so that the terminal equipment can accurately notify the network equipment through the preamble which set of PUSCH resources it uses, thereby improving the accuracy of random access.
  • the terminal device when the terminal device associates the preamble with the PUSCH resource unit, it may first follow the DMRS sequence port (or DMRS sequence number) in ascending order, then follow the PUSCH resource configuration sequence number where the PUSCH resource unit is located, and then follow the PUSCH The time domain resource sequence numbers of the resource units are associated in ascending order. Or, when the terminal device associates the preamble with the PUSCH resource unit, it can first follow the PUSCH resource configuration sequence number where the PUSCH resource unit is located in ascending order, then follow the time domain resource sequence number of the PUSCH resource unit in ascending order, and then follow the DMRS port sequence number (or DMRS sequence number ) To associate in ascending order.
  • the terminal equipment is associated according to certain rules, so that the terminal equipment can accurately notify the network equipment through the preamble which set of PUSCH resources it uses, thereby improving the accuracy of random access.
  • the terminal device when the terminal device associates the preamble with the PUSCH resource unit, it can first follow the PUSCH resource configuration sequence number where the PUSCH resource unit is located in ascending order, then follow the DMRS port sequence number (or DMRS sequence number) in ascending order, and then follow the PUSCH
  • the frequency domain resource sequence numbers of the resource units are in ascending order, and then the association is performed in ascending order of the time domain resource sequence numbers of the PUSCH resource units.
  • the terminal device when the terminal device associates the preamble with the PUSCH resource unit, it can first follow the PUSCH resource configuration sequence number where the PUSCH resource unit is located in ascending order, then follow the ascending order of the DMRS port sequence number, then follow the ascending sequence of the DMRS sequence number, and then follow the frequency domain of the PUSCH resource unit The resource sequence number is in ascending order, and then the association is performed in the ascending order of the time domain resource sequence number of the PUSCH resource unit.
  • the terminal device when the terminal device associates the preamble with the PUSCH resource unit, it can first follow the PUSCH resource configuration sequence number where the PUSCH resource unit is located in ascending order, then follow the ascending sequence of the DMRS sequence number, then follow the ascending sequence of the DMRS port sequence number, and then follow the frequency domain of the PUSCH resource unit The resource sequence number is in ascending order, and then the association is performed in the ascending order of the time domain resource sequence number of the PUSCH resource unit.
  • the PUSCH resource units configured by multiple sets of PUSCH resources are interleaved and preamble mapped, so that the PUSCH resource allocation is more uniform.
  • the terminal device when the terminal device associates the preamble with the PUSCH resource unit, it can first follow the ascending order of the DMRS port sequence number (or DMRS sequence number), then follow the ascending order of the frequency domain resource sequence number of the PUSCH resource unit, and again follow the PUSCH resource
  • the time domain resource sequence numbers of the units are in ascending order, and finally, in ascending order according to the PUSCH resource configuration sequence number where the PUSCH resource unit is located.
  • the terminal device when associating the preamble with the PUSCH resource unit, can first follow the ascending order of the DMRS port sequence number, then follow the ascending sequence of the DMRS sequence number, then follow the ascending order of the frequency domain resource sequence number of the PUSCH resource unit, and again follow the time domain resource of the PUSCH resource unit
  • the sequence numbers are in ascending order, and finally, in ascending order according to the PUSCH resource configuration sequence number where the PUSCH resource unit is located.
  • the terminal device may first follow the ascending order of the DMRS sequence number, then follow the ascending order of the DMRS port sequence number, then follow the ascending order of the frequency domain resource sequence number of the PUSCH resource unit, and again follow the time domain resource of the PUSCH resource unit
  • the sequence numbers are in ascending order, and finally, in ascending order according to the PUSCH resource configuration sequence number where the PUSCH resource unit is located.
  • an embodiment of the present application provides a method for determining random access resources.
  • the method includes: for each preamble in a plurality of preambles, a terminal device maps the preamble independently to N sets of uplink channel resource configurations. , N is an integer greater than 1. Among them, one of the three configurations of the time-frequency resource, DMRS port, and DMRS sequence of each set of PUSCH resource configuration is different, or the two are different, or the three are different.
  • the network device does not need to explicitly configure the preamble grouping information for multiple sets of PUSCH resource configuration.
  • the terminal device maps the PUSCH resource unit configured for each set of PUSCH resources to the preamble independently.
  • One or more of the three configurations of PUSCH time-frequency resource, DMRS port, and DMRS sequence of a set of PUSCH resource configuration are different, so the terminal device can use one of the three configurations of PUSCH time-frequency resource, DMRS port, and DMRS sequence.
  • One or more items are used to inform the network device which set of PUSCH resources it uses, so as to save the signaling overhead of configuring preamble packet information.
  • the method described in the embodiments of the present application can reduce the collision probability of preambles when two terminal devices select the same PUSCH resource configuration.
  • the terminal device can determine the number of PUSCH resource units corresponding to each preamble for each PUSCH resource configuration in the N sets of PUSCH resource configurations, and determine the number of PUSCH resource units corresponding to each preamble. Multiple preambles are mapped to the PUSCH resource configuration. According to the method designed above, the terminal device can make each preamble have a mapping relationship with N sets of PUSCH resource configurations, so that when two terminal devices select the same PUSCH resource configuration, the collision probability of each group of preambles can be reduced.
  • this application provides an apparatus for determining random access resources.
  • the apparatus may be a communication device, or a chip or chipset in the communication device.
  • the device may include a processing unit and a transceiving unit.
  • the processing unit may be a processor, and the transceiving unit may be a transceiver;
  • the device may also include a storage module, and the storage module may be a memory; the storage module is used to store instructions, and the processing unit The instructions stored in the storage module are executed, so that the communication device executes the corresponding functions in the first aspect, the second aspect, or the third aspect.
  • the processing unit may be a processor, and the transceiver unit may be an input/output interface, a pin or a circuit, etc.; the processing unit executes the instructions stored in the storage module to To enable the communication device to perform the corresponding functions in the first aspect, or the second aspect, or the third aspect, the storage module may be a storage module (for example, a register, a cache, etc.) in the chip or a chipset, or the A storage module (for example, read-only memory, random access memory, etc.) located outside the chip or chipset in the communication device.
  • the storage module may be a storage module (for example, a register, a cache, etc.) in the chip or a chipset, or the A storage module (for example, read-only memory, random access memory, etc.) located outside the chip or chipset in the communication device.
  • an apparatus for determining random access resources including a processor, a communication interface, and a memory.
  • the communication interface is used to transmit information, and/or messages, and/or data between the device and other devices.
  • the memory is used to store computer-executable instructions.
  • the processor executes the computer-executable instructions stored in the memory, so that the device executes any design in the first aspect or the first aspect, or the second
  • the method for determining random access resources as described in any design of the second aspect or the second aspect, or the third aspect or any one of the third aspects.
  • a computer storage medium provided by an embodiment of the present application.
  • the computer storage medium stores program instructions.
  • the program instructions run on a communication device, the communication device executes the first aspect of the embodiments of the present application and any one of them. Possible designs, or any design in the second aspect or the second aspect, or the third aspect or any design method in the third aspect.
  • a computer program product provided by an embodiment of the present application, when the computer program product runs on a communication device, causes the communication device to make the first aspect of the embodiment of the present application and any possible design, or the second aspect or Any design in the second aspect, or the third aspect or any method designed in the third aspect.
  • a chip provided by an embodiment of the present application is coupled with a memory, and executes the first aspect and any possible design of the embodiment of the present application, or any design in the second aspect or the second aspect, Or the method of the third aspect or any one of the third aspects.
  • Coupled in the embodiments of the present application means that two components are directly or indirectly combined with each other.
  • FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the application
  • FIG. 2 is a schematic diagram of a four-step random access process provided by an embodiment of this application.
  • FIG. 3 is a schematic diagram of a two-step random access process provided by an embodiment of this application.
  • FIG. 4 is a schematic flowchart of a method for determining random access resources according to an embodiment of this application
  • FIG. 5 is a schematic diagram of mapping a preamble packet to a PUSCH resource configuration provided by an embodiment of the application
  • FIG. 6 is a schematic diagram of another preamble packet mapping to PUSCH resource configuration provided by an embodiment of the application.
  • FIG. 7 is a schematic diagram of still another preamble packet mapping to PUSCH resource configuration provided by an embodiment of the application.
  • FIG. 8 is a schematic diagram of yet another preamble packet mapping to PUSCH resource configuration provided by an embodiment of the application.
  • FIG. 9 is a schematic diagram of mapping a preamble packet to a PUSCH resource configuration provided by an embodiment of the application.
  • FIG. 10 is a schematic flowchart of another method for determining random access resources according to an embodiment of this application.
  • FIG. 11A is a schematic diagram of a first sequence provided by an embodiment of this application.
  • FIG. 11B is a schematic diagram of a mapping relationship between preamble and PUSCH resource unit provided by an embodiment of this application.
  • FIG. 12 is a schematic diagram of a mapping relationship between preamble and PUSCH resource unit provided by an embodiment of this application.
  • FIG. 13 is a schematic diagram of a mapping relationship between preamble and PUSCH resource unit provided by an embodiment of this application;
  • FIG. 14 is a schematic diagram of a mapping relationship between preamble and PUSCH resource unit provided by an embodiment of this application.
  • 15 is a schematic diagram of a mapping relationship between preamble and PUSCH resource unit provided by an embodiment of the application.
  • 16 is a schematic diagram of a mapping relationship between preamble and PUSCH resource unit provided by an embodiment of the application.
  • FIG. 17 is a schematic structural diagram of an apparatus for determining random access resources provided by an embodiment of this application.
  • FIG. 18 is a schematic structural diagram of an apparatus for determining random access resources provided by an embodiment of this application.
  • the method for determining random access resources provided in this application can be applied to various communication systems, for example, it can be an Internet of Things (IoT) system and a narrowband Internet of Things (NB-IoT) system , Long-term evolution (LTE) system, it can also be a fifth-generation (5G) communication system, it can also be a hybrid architecture of LTE and 5G, it can also be a 5G new radio (NR) system, and future communications New communication systems etc. appearing in development. As long as multiple sets of uplink channel resource configurations and preambles need to be mapped in the communication system, the method for determining random access resources provided in the embodiments of the present application can be used.
  • IoT Internet of Things
  • NB-IoT narrowband Internet of Things
  • 5G fifth-generation
  • NR 5G new radio
  • the terminal device involved in the embodiments of the present application is an entity on the user side for receiving or transmitting signals.
  • the terminal device may be a device that provides voice and/or data connectivity to the user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, and the like.
  • the terminal device can also be another processing device connected to the wireless modem.
  • the terminal device can communicate with a radio access network (RAN).
  • Terminal equipment can also be called wireless terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point (access point) , Remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), user equipment (user device), or user equipment (user equipment, UE), etc.
  • the terminal device can be a mobile terminal, such as a mobile phone (or called a "cellular" phone) and a computer with a mobile terminal.
  • a mobile terminal such as a mobile phone (or called a "cellular" phone) and a computer with a mobile terminal.
  • the terminal device can be a portable, pocket-sized, handheld, built-in computer or vehicle-mounted mobile device, which is compatible with wireless The access network exchanges language and/or data.
  • the terminal device can also be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), and other equipment.
  • Common terminal devices include, for example: mobile phones, tablet computers, laptops, handheld computers, mobile internet devices (MID), wearable devices, such as smart watches, smart bracelets, pedometers, etc., but this application is implemented Examples are not limited to this.
  • the network device involved in the embodiments of this application is an entity on the network side for transmitting or receiving signals, and can be used to convert received air frames and Internet protocol (IP) packets to each other as A router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network, etc.
  • IP Internet protocol
  • the network equipment can also coordinate the attribute management of the air interface.
  • the network equipment can be an evolved Node B (eNB or e-NodeB) in LTE, a new radio controller (NR controller), or a gNode B (gNB) in a 5G system.
  • eNB evolved Node B
  • NR controller new radio controller
  • gNode B gNode B
  • Network equipment can cover 1 or more cells.
  • the method for determining random access resources can be applied to the communication system shown in FIG. 1, where the network equipment and UE1 to UE3 form a single cell communication system, and UE1 to UE3 can send uplink data separately or simultaneously To the network device, the network device can send downlink data to UE1 to UE3 separately or simultaneously.
  • FIG. 1 is only an exemplary illustration, and does not specifically limit the number of terminal equipment, network equipment, and the number of cells covered by the network equipment included in the communication system.
  • the UE can enter the RRC connection state from the idle state or inactive state through random access from the radio resource control (RRC) state, and establish a connection with the network equipment Various bearers obtain some necessary resources and parameter configurations, and then communicate with network devices.
  • RRC radio resource control
  • the UE sends a random access preamble (random access preamble) to a network device, which may also be referred to as a first message (Msg1).
  • the function of the random access preamble is to inform the network device that there is a random access request, and enable the network device to estimate the transmission delay between it and the UE, so that the network device can calibrate the uplink timing and pass the calibration information through the timing Inform the UE of an advance command (timing advance command).
  • the network device After detecting the random access preamble, the network device sends a random access response to the UE, which may also be referred to as a second message (Msg2).
  • the random access response may include, but is not limited to, the sequence number of the random access preamble received in S201, the timing advance instruction, the uplink resource allocation information, and the cell wireless network temporary identification.
  • the UE receives a random access response. If the random access preamble indicated by the sequence number of the random access preamble in the random access response is the same as the random access preamble sent by the UE to the network device in S201, then The UE considers that the random access response is a random access response for the UE, that is, the UE has received the random access response of the UE. After receiving the random access response, the UE sends an uplink message on the uplink channel resources indicated by the random access response. For example, the physical uplink shared channel (PUSCH) is sent in Msg3, which is also called the third message (Msg3). ). Among them, Msg3 can carry a unique user ID.
  • Msg3 can carry a unique user ID.
  • the network device receives the uplink message of the UE, and returns a conflict resolution message to the UE that has successfully accessed, which is also called a fourth message (Msg4).
  • Msg4 a fourth message
  • the network device will carry the unique user identifier in Msg3 in the conflict resolution message to specify the UE that has successfully accessed, and other UEs that have not successfully accessed will re-initiate random access.
  • a two-step random access process is currently proposed, as shown in Figure 3, where the UE simultaneously sends a random access preamble to the network device in the first step And data.
  • the network device sends a random access response to the UE.
  • the UE sends the random access preamble and data at the same time in the first step, which can greatly reduce the delay of uplink data transmission.
  • the network device does not need to send the scheduling information corresponding to Msg3 for the UE, thereby reducing signaling overhead.
  • MsgA can be used to represent the first interactive message of two-step random access.
  • the MsgA is sent by the UE to the network device.
  • the MsgA message includes the MsgA preamble part and the MsgA data part.
  • the preamble is carried on the MsgA physical random access channel (physical random access channel). , PRACH) physical channel
  • the data part is carried on the MsgA PUSCH physical channel for transmission.
  • PRACH refers to "MsgA PRACH physical channel”
  • PUSCH refers to "MsgA PUSCH physical channel”.
  • the preamble and data are sent in the same message (ie MsgA message), and the time-frequency resources of PRACH and PUSCH are different, it is necessary to establish the mapping relationship between preamble and PUSCH resources, so that network equipment When receiving a preamble, it can determine which PUSCH resource the data part corresponding to the preamble is on, or in other words, when the network device receives multiple preambles and data, it can determine which preamble and which data is the same UE Sent.
  • the PUSCH resource is usually configured by the network device through a broadcast message, that is, the PUSCH resource configuration of the UEs that receive the broadcast message are all the same.
  • the UE or even the same UE, have different data packet sizes and channel conditions at different times, that is, the UE’s expected modulation and coding scheme (MCS) and transport block size (TBS)
  • MCS modulation and coding scheme
  • TBS transport block size
  • each set of PUSCH resource configuration can include MCS, TBS, PUSCH time domain resource configuration, PUSCH frequency domain resource configuration, repeated transmission One or more of configuration, demodulation reference signal (DMRS) configuration and other information, MCS, TBS, number of repeated transmissions of different PUSCH resource configurations, and time-frequency resource location and time-frequency resource of each PUSCH
  • the size can be the same or different.
  • the UE can select a set of PUSCH resource configuration according to its own needs, and transmit data on the corresponding PUSCH resource according to the PUSCH resource configuration. However, when multiple sets of PUSCH resource configurations are configured in two-step random access, how does the terminal device determine the random access resources so that the network device knows which PUSCH resource configuration the terminal device uses.
  • the UE can use the preamble grouping method in the four-step random access process to group the preambles, and then map a preamble group to a set of PUSCH resource configurations.
  • the UE selects a certain set of PUSCH resource configuration, it can use the preamble in the preamble group corresponding to the PUSCH resource configuration to perform random access. Therefore, after receiving the MsgA sent by the UE, the network device can use the PUSCH resource configuration corresponding to the preamble group where the preamble part of the MsgA is located to receive the data included in the MsgA.
  • the preamble grouping method in the four-step random access process is that the network device can configure the preamble grouping information for the UE, including three parameters ra-Msg3SizeGroupA, messagePowerOffsetGroupB, and numberOfRA-PreamblesGroupA.
  • the parameter numberOfRA-PreamblesGroupA is used to determine the preamble group.
  • the first numberOfRA-PreamblesGroupA preambles belong to group A, and the remaining preambles belong to group B.
  • the UE selects the preamble in group B, otherwise the UE selects the preamble in group A, where PCMAX represents the maximum transmission power of the UE, and preambleReceivedTargetPower represents the initial base station configuration
  • PCMAX represents the maximum transmission power of the UE
  • preambleReceivedTargetPower represents the initial base station configuration
  • the target received power of the random access preamble, msg3-DeltaPreamble represents the power offset between the preamble and Msg3.
  • the above solution has at least two problems.
  • the above solution requires the network device to explicitly configure the preamble grouping information for the UE (that is, ra-Msg3SizeGroupA, messagePowerOffsetGroupB, numberOfRA-PreamblesGroupA three parameters), when the number of sets of PUSCH resource configuration
  • the signaling overhead required for preamble grouping is relatively large.
  • N sets of PUSCH resource configurations are configured, at least N-1 preamble grouping information is required to divide the preamble into N groups.
  • the number of preambles in each group is reduced. When two UEs select the same PUSCH resource configuration, the probability of preamble collision is higher.
  • the embodiments of the present application provide three methods and devices for determining random access resources to solve how the terminal device determines random access when multiple sets of PUSCH resource configurations are configured in the two-step random access process in the prior art. Enter resources so that the network equipment knows which PUSCH resource configuration the terminal equipment uses.
  • the method and the device are based on the same inventive concept. Since the principles of the method and the device to solve the problem are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • And/or describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are in an “or” relationship.
  • the following at least one (item) or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • At least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c It can be single or multiple.
  • a method for determining random access resources is provided in this embodiment of the application.
  • the method may be applied to the communication system shown in FIG. 1, and specifically, the method may be applied to terminal equipment. Terminal equipment can use a two-step random access process to access network equipment.
  • the method for determining random access resources may specifically include:
  • S401 The terminal device divides the multiple preambles associated with the synchronization signal block to each random access time-frequency resource into N groups according to N sets of uplink channel resource configurations, where N is an integer greater than 1, and N groups of preambles
  • the codes correspond to N sets of uplink channel resource configuration one to one.
  • N sets of uplink channel resource configurations can correspond to N sets of preambles in ascending order of sequence numbers, or N sets of uplink channel resources can also correspond to N sets of preambles in descending order of sequence numbers. Of course, other correspondences can also be used. There is no specific restriction here.
  • the N sets of preambles correspond to the N sets of uplink channel resource configurations one-to-one. It can also be understood that the N sets of preambles correspond to the PUSCH time-frequency resource sets configured by the N sets of uplink channel resource configurations.
  • the code corresponds to a set of PUSCH time-frequency resources configured by a set of uplink channel resource configuration.
  • each of the multiple random access time-frequency resources associated with the synchronization signal block that is, the preamble associated with the synchronization signal block on a single random access time-frequency resource All are divided into N groups, which can also be understood as that the preamble associated with the synchronization signal block on a single random access time-frequency resource belongs to a preamble set to be grouped, and then each preamble set to be grouped is divided into N groups.
  • the synchronization signal block is associated with two random access time-frequency resources.
  • the synchronization signal block is associated with 10 preambles, and the terminal device can
  • the 10 preambles associated with the synchronization signal block on each random access time-frequency resource are divided into N groups according to N sets of uplink channel resource configurations. The process of dividing a preamble set to be grouped into N groups is described below.
  • the preamble groups associated with the same uplink channel resource configuration on different random access time-frequency resources can be regarded as an independent group, or can be regarded as the same Group, there is no specific limitation here.
  • the synchronization signal block is associated with random access time-frequency resource 1 and random access time-frequency resource 2, where random access time-frequency resource 1 is associated with preamble group 1 (including preamble 0-13) of uplink channel resource configuration 1.
  • Random access time-frequency resource 2 is associated with preamble group 2 (including preamble 0 ⁇ 6) of uplink channel resource configuration 1.
  • preamble 0 ⁇ 13 on random access time-frequency resource 1 belongs to a group, and random access
  • the preambles 0 to 6 on the time-frequency resource 2 belong to another group, or the preambles 0 to 13 on the random access time-frequency resource 1 and the preambles 0 to 6 on the random access time-frequency resource 2 belong to the same group.
  • the synchronization signal block may be a synchronization signal/physical broadcast channel block (SS/PBCH block, SSB).
  • random access may refer to the two-step random access process, and the synchronization signal of the two-step random access process
  • the block and the synchronization signal block of the four-step random access process may be the same or different, and there is no specific limitation here.
  • the synchronization signal block is referred to as SSB below.
  • the random access time-frequency resource is the time-frequency resource used by the terminal device to send the random access preamble.
  • the random access time-frequency resource may be PRACH.
  • RO is usually used to represent a period of random access time-frequency resources used to send a random access preamble.
  • random access time-frequency resources can refer to "MsgA PRACH physical channel", or can also refer to "PRACH transmission opportunity", or can also refer to "MsgA PRACH physical channel” and "PRACH physical channel”. Transmission opportunities”.
  • PRACH Physical channels for the convenience of description, the random access time-frequency resource is referred to as PRACH below.
  • the uplink channel refers to the time-frequency resource used to carry the MsgA data part.
  • the uplink channel may be a PUSCH resource.
  • the PUSCH transmission opportunity (PUSCH occasion, PO) is usually used to represent a PUSCH time-frequency resource used to send the MsgA data part in the two-step random access process.
  • the uplink channel may refer to "MsgA PUSCH physical channel", or may also refer to "PUSCH transmission opportunity".
  • the uplink channel is referred to as PUSCH resource below.
  • each set of PUSCH resource configuration may include, but is not limited to, one or more of MCS, TBS, PUSCH time domain resource configuration, PUSCH frequency domain resource configuration, repeated transmission configuration, and DMRS configuration.
  • the terminal device determines a target PUSCH resource configuration in N sets of PUSCH resource configurations.
  • the terminal device can select the target PUSCH resource configuration among N sets of PUSCH resource configurations according to the data packet size, channel conditions, etc., where the target PUSCH resource configuration can meet the parameters such as MCS, TBS, and time-frequency resource size expected by the terminal device At least one of.
  • the terminal device determines a preamble in the preamble group corresponding to the target PUSCH resource configuration.
  • the preamble determined by the terminal device in step S403 can be used as the preamble part of the first message in the two-step random access process, and the data part of the first message can be sent using the target PUSCH resource configuration determined in step S402, for example,
  • the data part of the first message is carried on the PUSCH time-frequency resource configured by the target PUSCH resource configuration and sent using the parameters configured by the target PUSCH resource configuration.
  • the network device After the network device receives the preamble sent by the terminal device, it determines the corresponding PUSCH resource configuration according to the preamble group where the preamble is located, and determines the PUSCH time-frequency resource carrying the data according to the preamble and the association relationship between the preamble and the PUSCH time-frequency resource, and The data sent by the terminal device is received on the PUSCH time-frequency resource according to the parameters configured by the PUSCH resource configuration.
  • the network equipment and the terminal equipment have the same understanding of the association relationship between the preamble group and the PUSCH resource configuration.
  • the network device can also establish the mapping relationship between the preamble group and the PUSCH resource configuration in the same manner as in step S401, so that the network device can determine the preamble group where the preamble is located after receiving the preamble sent by the terminal device And the corresponding PUSCH resource configuration can be determined according to the preamble group.
  • the network device may not need to explicitly configure the preamble grouping information for multiple sets of PUSCH resources.
  • the terminal device may group the preamble sets to be grouped according to the N sets of PUSCH resource configurations, and each group of preambles and a set of PUSCH resources Configure mapping, which can save the signaling overhead of configuring preamble packet information.
  • the terminal device when the terminal device divides the set of preambles to be grouped into N groups according to N sets of PUSCH resource configurations, it can determine the number of preambles corresponding to each set of PUSCH resource configuration, and then configure the number of preambles corresponding to the N sets of PUSCH resource configurations. Divide the preamble set to be grouped into N groups.
  • the terminal device when determining the number of preambles corresponding to each set of PUSCH resource configurations, can determine each set of PUSCH according to the number of PUSCH resource units respectively configured by the N sets of PUSCH resource configurations and the total number of preambles in the preamble set to be grouped. The number of preambles corresponding to the resource configuration.
  • PUSCH resource unit may refer to a PUSCH time-frequency resource
  • PUSCH resource unit may refer to a combination of a PUSCH time-frequency resource and a DMRS port
  • a PUSCH resource unit may refer to a combination of a PUSCH time-frequency resource and a DMRS sequence
  • the PUSCH resource unit may refer to a combination of a PUSCH time-frequency resource, a DMRS port, and a DMRS sequence.
  • the terminal device may also determine each set of PUSCH resources according to the number of PUSCH resource units respectively configured by N sets of PUSCH resource configurations, and the mapping ratio between the preamble and the PUSCH resource units configured by each set of PUSCH resource configurations Configure the number of corresponding preambles.
  • the mapping ratio between the preamble and the PUSCH resource units configured in the PUSCH resource configuration is the number of PUSCH resource units associated with a preamble.
  • the mapping ratio between the preamble and the PUSCH resource units configured in the PUSCH resource configuration is 1:3, which means 1 One preamble is associated with three PUSCH resource configurations.
  • the mapping ratio between the preamble and the PUSCH resource unit configured by the PUSCH resource configuration is 2:1, which means that two preambles are associated with one PUSCH resource configuration.
  • the terminal device may also determine the number of preambles corresponding to each PUSCH resource configuration according to the total number of PUSCH resource configurations N and the total number of preambles in the preamble set to be grouped.
  • the following describes the process of the terminal device dividing the set of preambles to be grouped into N groups in combination with a specific manner.
  • Method 1 The terminal device can determine the corresponding PUSCH resource configuration according to the number of PUSCH resource units configured in each PUSCH resource configuration in the N sets of PUSCH resource configurations in the first time period and the total number of preambles in the preamble set to be grouped The number of preambles.
  • the first time period may refer to the period of the PRACH time-frequency resource, the period of the PUSCH time-frequency resource, or the msgA mapping period, that is, the mapping period of preamble and PUSCH resource units.
  • the first time period may also be predefined or configured by the network device. It should be understood that the first period of time may generally refer to a period of time. Taking the period of the PRACH time-frequency resource as an example, the first time period can generally refer to the duration of one period of the PRACH time-frequency resource.
  • the preamble grouping result determined by the terminal device can also be applied to all PRACH time-frequency resources cycle.
  • the terminal device can group the preamble set of packets for one period of the PRACH time-frequency resource, and then the obtained grouping result can be applied to all the periods of the PRACH time-frequency resource, that is, in each period of the PRACH time-frequency resource
  • the grouping results of the preamble sets to be grouped are the same. In this manner, the terminal device only needs to perform preamble grouping once, and the grouping result can be applied in other PRACH time-frequency resource periods without the need to perform preamble grouping again.
  • the first time period can also specifically refer to a specified period. Taking the period of the PRACH time-frequency resource as an example, the first time period may specifically refer to a certain period of the PRACH time-frequency resource, and the first time period includes the starting position and duration of the period.
  • the preamble grouping result determined by the terminal device may only be applied to this period of the PRACH time-frequency resource. Specifically, the terminal device can group the preamble sets to be grouped for different periods of the PRACH time-frequency resources. The grouping results of the preamble sets to be grouped in each period of the PRACH time-frequency resources may be the same or different.
  • the grouping of the preamble sets to be grouped The result is related to the number of PUSCH resource units and the total number of preambles in the specific period of the PRACH time-frequency resource. In this manner, the terminal device needs to regroup the packet preamble set when performing random access in another period of the PRACH time-frequency resource.
  • the terminal device can determine the ratio of the number of PUSCH resource units for each set of PUSCH resource configuration in the first time period to the total number of PUSCH resource units for N sets of PUSCH resource configuration in the first time period, and then can preamble to be grouped The number of preambles in the set is multiplied by the ratio, and the result obtained is the number of preambles corresponding to the PUSCH resource configuration. That is, the number of preambles corresponding to each PUSCH resource configuration conforms to the following formula:
  • q i is the number of preambles corresponding to the i-th PUSCH resource configuration
  • b is the number of preambles in the preamble set to be grouped
  • a i is the number of PUSCH resource units configured in the i-th PUSCH resource configuration in the first time period .
  • the number of preambles corresponding to the first N-1 sets of PUSCH resource configurations conforms to the above formula, and the number of preambles corresponding to the last set of PUSCH resource configurations is the number of remaining preambles in the preamble set to be grouped.
  • the network device is configured with 4 sets of PUSCH resource configurations, and the PUSCH resources are configured with 0 to 3 respectively.
  • the numbers of PUSCH resource units configured by PUSCH resource configurations 0 to 3 are 16, 8, 4, and 4, respectively.
  • Each SSB is associated with one PRACH time-frequency resource, and the number of preambles associated with each SSB on each PRACH time-frequency resource is 64, that is, each preamble set to be grouped includes 64 preambles.
  • the number of preambles corresponding to PUSCH resource configuration 0 is Therefore, in each preamble set to be grouped, the first 32 preambles (that is, preamble#0-31) belong to preamble group 0, and this preamble group 0 can correspond to PUSCH resource configuration 0.
  • the number of preambles corresponding to PUSCH resource configuration 1 is Therefore, in each preamble set to be grouped, the 33rd to 48th preambles (that is, preamble#32 to 47) belong to preamble group 1, and this preamble group 1 can correspond to PUSCH resource configuration 1.
  • the number of preambles corresponding to PUSCH resource configuration 2 is Therefore, in each preamble set to be grouped, the 49th to 56th preambles (that is, preamble#48 to 55) belong to preamble group 2, and this preamble group 2 can correspond to PUSCH resource configuration 2.
  • the number of preambles corresponding to PUSCH resource configuration 3 is Therefore, in each preamble set to be grouped, the 57th to 64th preambles (that is, preamble#56-63) belong to preamble group 3, and this preamble group 3 can correspond to PUSCH resource configuration 3. As shown in Figure 5.
  • the network device is configured with 4 sets of PUSCH resource configurations, and the PUSCH resources are configured with 0 to 3 respectively.
  • the numbers of PUSCH resource units configured by PUSCH resource configurations 0 to 3 are 12, 8, 6, 2 respectively.
  • Each PRACH time-frequency resource is associated with 2 SSBs, where the number of preambles associated with each SSB on each PRACH time-frequency resource is 32, and the preamble 0-31 on each PRACH time-frequency resource is associated with one SSB, preamble 32-63 Associate another SSB.
  • preambles 0 to 31 belong to a set of preambles to be grouped
  • preambles 32 to 63 belong to a set of preambles to be grouped
  • each set of preambles to be grouped includes 32 preambles.
  • the 23rd to 28th preambles (that is, preamble#22-27) belong to preamble group 2, and this preamble group 2 can correspond to PUSCH resource configuration 2.
  • the 29th to 32nd preambles (that is, preamble#28 to 31) belong to preamble group 3, and this preamble group 3 can correspond to PUSCH resource configuration 3.
  • the first 13 preambles (ie, preamble#32-44) belong to preamble group 0, and this preamble group 0 can correspond to PUSCH resource configuration 0.
  • the 14th to 22nd preambles (that is, preamble#45 to 53) belong to preamble group 1, and this preamble group 1 can correspond to PUSCH resource configuration 1.
  • the 23rd to 28th preambles (that is, preamble#54 to 59) belong to preamble group 2, which can correspond to PUSCH resource configuration 2.
  • the 29th to 32nd preambles (that is, preamble#60-63) belong to preamble group 3, which can correspond to PUSCH resource configuration 3. As shown in Figure 6.
  • Method 2 The terminal device can determine the number of preambles corresponding to each PUSCH resource configuration according to the average number of PUSCH resource units configured in each PUSCH resource configuration in the N sets of PUSCH resource configurations and the total number of preambles in the preamble set to be grouped .
  • the average number of PUSCH resource units configured in the PUSCH resource configuration per unit time may be the number of configured PUSCH resource units in each PUSCH time-frequency resource period divided by the time length of the period of the PUSCH time-frequency resource.
  • the PUSCH resource configuration may include the offset of the PUSCH time-frequency resource, and the offset is used to indicate the PUSCH time-frequency resource.
  • the resource is based on the relative position of the PRACH time-frequency resource in the time domain.
  • the period of the PUSCH time-frequency resource may be the period of the PRACH time-frequency resource.
  • the terminal device can determine the ratio of the number of PUSCH resource units per set of PUSCH resource configuration per unit time to the total number of PUSCH resource units per unit time of N sets of PUSCH resource configuration, and then can group the preambles in the preamble set to be grouped The number is multiplied by the ratio, and the result obtained is the number of preambles corresponding to the PUSCH resource configuration. That is, the number of preambles corresponding to each PUSCH resource configuration conforms to the following formula:
  • q i is the number of preambles corresponding to the i-th PUSCH resource configuration
  • b is the number of preambles in the preamble set to be grouped
  • f i is the number of PUSCH resource units configured in the i-th PUSCH resource configuration in the PUSCH time-frequency resource period
  • the number, t i is the PUSCH time-frequency resource period of the i-th PUSCH resource configuration.
  • the number of preambles corresponding to the first N-1 sets of PUSCH resource configurations conforms to the above formula, and the number of preambles corresponding to the last set of PUSCH resource configurations is the number of remaining preambles in the preamble set to be grouped.
  • the network device is configured with 4 sets of PUSCH resource configurations, respectively 0 to 3 for PUSCH resource configurations, where the PUSCH time-frequency resource periods of PUSCH resource configurations 0 to 3 are 5ms, 5ms, 10ms, and 10ms, respectively.
  • the number of PUSCH resource units configured in PUSCH resource configurations 0 to 3 in the PUSCH time-frequency resource period are 8, 4, 4, and 2, respectively.
  • Each SSB is associated with one PRACH time-frequency resource, and the number of preambles associated with each SSB on each PRACH time-frequency resource is 64, that is, each preamble set to be grouped includes 64 preambles.
  • the number of preambles corresponding to PUSCH resource configuration 0 is Therefore, in each preamble set to be grouped, the first 34 preambles (that is, preamble#0-33) belong to preamble group 0, and this preamble group 0 can correspond to PUSCH resource configuration 0.
  • the number of preambles corresponding to PUSCH resource configuration 1 is Therefore, in each preamble set to be grouped, the 35th to 51st preambles (that is, preamble#34-50) belong to preamble group 1, and this preamble group 1 can correspond to PUSCH resource configuration 1.
  • the number of preambles corresponding to PUSCH resource configuration 2 is Therefore, in each preamble set to be grouped, the 52nd to 59th preambles (that is, preamble#51 to 58) belong to preamble group 2, and this preamble group 2 can correspond to PUSCH resource configuration 2.
  • the number of preambles corresponding to PUSCH resource configuration 3 is Therefore, in each preamble set to be grouped, the 60th to 63th preambles (i.e. preamble#59-62) belong to preamble group 3.
  • the preamble group 3 can correspond to PUSCH resource configuration 3.
  • the last preamble i.e. preamble#63) ) Does not belong to any preamble group, nor does it correspond to any PUSCH resource configuration. As shown in Figure 7.
  • the network device is configured with 4 sets of PUSCH resource configurations, each of which is configured with 0 to 3 for PUSCH resources, where the PUSCH time-frequency resource periods for PUSCH resource configurations 0 to 3 are 5ms, 5ms, 10ms, and 10ms, respectively.
  • the number of PUSCH resource units configured in PUSCH resource configurations 0 to 3 in the PUSCH time-frequency resource period are 8, 4, 4, and 2, respectively.
  • Each PRACH time-frequency resource is associated with two SSBs, where the number of preambles associated with each SSB on each PRACH time-frequency resource is 32, and preamble#0 ⁇ 31 are associated with one SSB on each PRACH time-frequency resource, preamble# 32 to 63 are associated with another SSB. That is, preamble#0-31 belong to a set of preambles to be grouped, preamble#32-63 belong to a set of preambles to be grouped, and each set of preambles to be grouped includes 32 preambles.
  • the 26th to 29th preambles (that is, preamble#25-28) belong to preamble group 2, and this preamble group 2 can correspond to PUSCH resource configuration 2.
  • the 30th to 32nd preambles (that is, preamble#29 to 31) belong to preamble group 3, and this preamble group 3 can correspond to PUSCH resource configuration 3.
  • the first 17 preambles (ie, preamble#32-48) belong to preamble group 0, and this preamble group 0 can correspond to PUSCH resource configuration 0.
  • the 18th to 25th preambles (that is, preamble#49-56) belong to preamble group 1, and this preamble group 1 can correspond to PUSCH resource configuration 1.
  • the 26th to 29th preambles (that is, preamble#57 to 60) belong to preamble group 2, and this preamble group 2 can correspond to PUSCH resource configuration 2.
  • the 30th to 32nd preambles (that is, preamble#61 to 63) belong to preamble group 3, which can correspond to PUSCH resource configuration 3. As shown in Figure 8.
  • the terminal device can determine each set of PUSCH resource configuration according to the number of PUSCH resource units configured in the first time period and the mapping ratio between the preamble and the PUSCH resource unit configured for each set of PUSCH resource configurations respectively. The number of corresponding preambles.
  • the first time period is the same as mode one, and may refer to the period of the PRACH time-frequency resource, may also be the period of the PUSCH time-frequency resource, or may be the msgA mapping period, that is, the mapping period of the preamble and PUSCH resource units.
  • the first time period may also be predefined or configured by the network device.
  • the first time period may be a time period related to the time domain resource where the preamble set to be grouped is located, or may be an absolute time range.
  • mapping ratio between the preamble and the PUSCH resource unit configured for each PUSCH resource configuration may be the same or different, and may be predefined or configured by a network device.
  • the terminal device can multiply the number of PUSCH resource units configured for each set of PUSCH resource configurations in the first time period by the mapping ratio of the preamble and the PUSCH resource units configured for each set of PUSCH resource configurations to obtain the result That is, the number of preambles corresponding to the PUSCH resource configuration. That is, the number of preambles corresponding to each PUSCH resource configuration conforms to the following formula:
  • q i is the number of preambles corresponding to the i-th PUSCH resource configuration
  • a i is the number of PUSCH resource units configured in the i-th PUSCH resource configuration in the first time period
  • r i is the preamble and the i-th PUSCH resource Configure the mapping ratio of the configured PUSCH resource units, that is, r i preambles are mapped to 1 PUSCH resource unit configured by the i-th PUSCH resource configuration.
  • the network device is configured with 4 sets of PUSCH resource configurations, and the PUSCH resources are configured with 0 to 3 respectively.
  • the numbers of PUSCH resource units configured by PUSCH resource configurations 0 to 3 are 16, 8, 8, 4, respectively.
  • the mapping ratios of the preamble and PUSCH resource units configured with PUSCH resource configurations 0 to 3 are 2, 2, 1, and 1, respectively.
  • Each SSB is associated with one PRACH time-frequency resource, and the number of preambles associated with each SSB on each PRACH time-frequency resource is 64, that is, each preamble set to be grouped includes 64 preambles.
  • the 49th to 56th preambles (that is, preamble#48 to 55) belong to preamble group 2, and this preamble group 2 can Corresponding to PUSCH resource configuration 2.
  • This preamble group 3 can Corresponding to PUSCH resource configuration 3.
  • the 61st to 64th preambles (ie, preamble#60 to 63) do not belong to any preamble group and do not correspond to any PUSCH resource configuration. As shown in Figure 9.
  • the terminal device can divide the preamble set to be grouped into N groups based on the number N of PUSCH resource configurations and the total number of preambles in the preamble set to be grouped, where the number of preambles corresponding to each set of PUSCH resource configuration is included in each group of preambles The number of preamble. That is, when the terminal device divides the multiple preambles on each PRACH associated with the SSB into N groups according to N sets of PUSCH resource configurations, the preambles to be grouped can be grouped according to the total number N of PUSCH resource configurations and the total number of preamble sets to be grouped. The preambles in the set are equally divided into N groups.
  • each PRACH time-frequency resource is associated with 2 SSBs.
  • each PRACH time-frequency resource is associated with each SSB.
  • the number of associated preambles is 32, preamble#0-31 are associated with one SSB on each PRACH time-frequency resource, and preamble#32-63 are associated with another SSB. That is, preamble#0-31 belong to a set of preambles to be grouped, preamble#32-63 belong to a set of preambles to be grouped, and each set of preambles to be grouped includes 32 preambles.
  • the number of preambles corresponding to each PUSCH resource configuration is Therefore, for the preamble set to be grouped including preamble#0-31, the first 10 preambles (ie, preamble#0-9) belong to preamble group 1, and this preamble group 1 can correspond to PUSCH resource configuration 0.
  • the 11th to 20th preambles (that is, preamble#10-19) belong to preamble group 2, and this preamble group 2 can correspond to PUSCH resource configuration 1.
  • the 21st to 30th preambles (that is, preamble#20-29) belong to preamble group 3, and this preamble group 3 can correspond to PUSCH resource configuration 2.
  • the first 10 preambles (ie, preamble#32-41) belong to preamble group 1, and this preamble group 1 can correspond to PUSCH resource configuration 0.
  • the 11th to 20th preambles (that is, preamble#42 to 51) belong to preamble group 2, and this preamble group 2 can correspond to PUSCH resource configuration 1.
  • the 21st to 30th preambles (that is, preamble#52 to 61) belong to preamble group 3.
  • each PRACH time-frequency resource is associated with 2 SSBs.
  • each PRACH time-frequency resource is associated with each PRACH time-frequency resource.
  • the number of preambles associated with the SSB is 32
  • preamble#0-31 are associated with one SSB on each PRACH time-frequency resource
  • preamble#32-63 are associated with another SSB. That is, preamble#0-31 belong to a set of preambles to be grouped, preamble#32-63 belong to a set of preambles to be grouped, and each set of preambles to be grouped includes 32 preambles.
  • the 21st to 32nd preambles (that is, preamble#20 to 31) belong to preamble group 3, which can correspond to PUSCH resource configuration 2.
  • the first 10 preambles ie, preamble#32-41) belong to preamble group 1, and this preamble group 1 can correspond to PUSCH resource configuration 0.
  • the 11th to 20th preambles (that is, preamble#42 to 51) belong to preamble group 2, and this preamble group 2 can correspond to PUSCH resource configuration 1.
  • the 21st to 32nd preambles (that is, preamble#52 to 63) belong to preamble group 3.
  • Another method for determining random access resources is provided in this embodiment of the application.
  • This method can be applied to the communication system shown in FIG. 1, and specifically, the method can be applied to terminal equipment.
  • Terminal equipment can use a two-step random access process to access network equipment.
  • the method for determining random access resources may specifically include:
  • the terminal device receives N sets of uplink channel resource configurations, where each set of uplink channel resource configurations is used to configure one or more PUSCH resource units, and the PUSCH resource unit is a PUSCH time-frequency resource, or when the PUSCH resource unit is a PUSCH A combination of frequency resources and a DMRS port, or a PUSCH resource unit is a combination of a PUSCH time-frequency resource and a DMRS sequence, or a PUSCH resource unit may refer to a combination of a PUSCH time-frequency resource, a DMRS port, and a DMRS sequence, N is an integer greater than 1.
  • the terminal device associates multiple preambles to the PUSCH resource units of the N sets of PUSCH resource configurations in a preset order.
  • the mapping ratio of the preamble to the PUSCH resource unit that is, the number of PUSCH resource units associated with each preamble, or the number of preambles associated with each PUSCH resource unit, can be configured by the network device or based on the PUSCH resource unit The number and the number of preambles are determined.
  • one preamble can be associated with one or more PUSCH resource units.
  • the number of PUSCH resource units associated with each preamble may satisfy the following formula:
  • s1 is the number of PUSCH resource units associated with each preamble
  • S1 is the number of PUSCH resource units
  • S2 is the number of preambles
  • It is a round-down operation.
  • one or more preambles can be associated with one PUSCH resource unit.
  • the number of preambles associated with each PUSCH resource unit can satisfy the following formula:
  • s2 is the number of preambles associated with each PUSCH resource unit
  • S1 is the number of PUSCH resource units
  • S2 is the number of preambles.
  • the specific actions on the network device side can refer to the related description in Embodiment 1, and the repetition will not be repeated.
  • the network device may not need to explicitly configure preamble grouping information for multiple sets of PUSCH resources, and the terminal device may map multiple sets of PUSCH resources with the preamble in a preset first order.
  • the preamble is uniquely mapped to the PUSCH resource unit configured by a set of PUSCH resource configuration.
  • the terminal device determines which preamble to choose according to the target PUSCH resource configuration selected by itself, and the terminal device can notify the network device which set of PUSCH resource configuration it uses through the preamble .
  • the terminal device associates multiple preambles to the PUSCH resource units of the N sets of PUSCH resource configurations according to the preset first order and second order, where the second order is the preamble association order, and the first order is the PUSCH resource The associated order of the units.
  • the preset second order may be related to any one of the following three kinds of information, or a combination of any two, or three items: the frequency domain resource sequence number of the PRACH time-frequency resource where the preamble is located, and the PRACH time-frequency resource where the preamble is located The sequence number of the time domain resource and the sequence number of the preamble.
  • the time domain resource sequence number of the PRACH time-frequency resource may include one or two of the time domain resource sequence number of the PRACH time-frequency resource in the PRACH time slot and the PRACH time slot sequence number.
  • the terminal device when the terminal device associates multiple preambles to the PUSCH resource units of the N sets of PUSCH resource configurations, it can associate the multiple preambles one by one to the PUSCH resource units of the N sets of PUSCH resource configurations in the ascending order of the preamble sequence number. on.
  • the terminal device when the terminal device associates multiple preambles to N sets of PUSCH resource units configured by PUSCH resources, it can associate the multiple preambles to N one by one according to the frequency domain resource sequence number of the PRACH time-frequency resource where the preamble is located.
  • the terminal device associates multiple preambles to the PUSCH resource units of N sets of PUSCH resource configurations
  • the multiple preambles can be associated to N one by one according to the time domain resource sequence number of the PRACH time-frequency resource where the preamble is located.
  • the preset second sequence is related to the frequency domain resource sequence number of the PRACH time-frequency resource where the preamble is located and the time domain resource sequence number of the PRACH time-frequency resource where the preamble is located.
  • the terminal device may first follow the ascending order of the frequency domain resource sequence number of the PRACH time-frequency resource where the preamble is located, and then follow the timing of the PRACH time-frequency resource where the preamble is located.
  • the sequence numbers of the domain resources are ascending, and multiple preambles are associated one by one to the PUSCH resource units of the N sets of PUSCH resource configurations.
  • the terminal device when the terminal device associates multiple preambles to the PUSCH resource units of the N sets of PUSCH resource configurations according to the preset second order, it may first follow the ascending order of the time domain resource sequence number of the PRACH time-frequency resource where the preamble is located, and then follow the PRACH where the preamble is located.
  • the frequency domain resource sequence numbers of the time-frequency resources are in ascending order, and multiple preambles are associated one by one to the PUSCH resource units of the N sets of PUSCH resource configurations.
  • the preset second sequence is related to the sequence number of the time domain resource of the PRACH time-frequency resource where the preamble is located, and the sequence number of the preamble.
  • the terminal device associates multiple preambles with the PUSCH resource units of the N sets of PUSCH resource configurations, it may first follow the ascending order of the time domain resource sequence number of the PRACH time-frequency resource where the preamble is located, and then follow the ascending order of the preamble sequence number to combine the multiple preambles.
  • the terminal device associates multiple preambles with the PUSCH resource units of the N sets of PUSCH resource configurations.
  • the terminal device when the terminal device associates multiple preambles to the PUSCH resource units of the N sets of PUSCH resource configurations according to the preset second order, it may first follow the ascending order of the preamble sequence number, and then follow the ascending sequence of the time domain resource sequence number of the PRACH time-frequency resource where the preamble is located , Associate multiple preambles to the PUSCH resource units of N sets of PUSCH resource configurations one by one.
  • the preset second sequence is related to the sequence number of the frequency domain resource of the PRACH time-frequency resource where the preamble is located, and the sequence number of the preamble.
  • the terminal device associates multiple preambles to the PUSCH resource units of the N sets of PUSCH resource configurations, it may first follow the ascending order of the frequency domain resource sequence number of the PRACH time-frequency resource where the preamble is located, and then according to the ascending order of the preamble sequence number, the multiple preambles One by one, it is associated with the PUSCH resource units of N sets of PUSCH resource configurations.
  • the terminal device when it associates multiple preambles to the PUSCH resource units of the N sets of PUSCH resource configurations, it may first follow the ascending order of the preamble sequence number, and then follow the ascending sequence of the frequency domain resource sequence number of the PRACH time-frequency resource where the preamble is located, and the multiple preambles one by one
  • the PUSCH resource unit associated with N sets of PUSCH resource configurations when the terminal device associates multiple preambles to the PUSCH resource units of the N sets of PUSCH resource configurations, it may first follow the ascending order of the preamble sequence number, and then follow the ascending sequence of the frequency domain resource sequence number of the PRACH time-frequency resource where the preamble is located, and the multiple preambles one by one
  • the PUSCH resource unit associated with N sets of PUSCH resource configurations when the terminal device associates multiple preambles to the PUSCH resource units of the N sets of PUSCH resource configurations.
  • the terminal device when the terminal device associates multiple preambles to the PUSCH resource units of the N sets of PUSCH resource configurations, it may first follow the sequence number of the preamble in ascending order, and then follow the sequence number of the frequency domain resource of the PRACH time-frequency resource where the preamble is located. Then, in ascending order of the time domain resource sequence number of the PRACH time-frequency resource where the preamble is located, multiple preambles are associated one by one to the PUSCH resource units of the N sets of PUSCH resource configurations.
  • the preset second sequence is related to the sequence number of the time domain resource of the PRACH time-frequency resource where the preamble is located, and the sequence number of the preamble.
  • the terminal device when the terminal device associates multiple preambles to the PUSCH resource units of N sets of PUSCH resource configurations, it may first follow the ascending order of the time domain resource sequence number of the PRACH time-frequency resource where the preamble is located, and then follow the frequency of the PRACH time-frequency resource where the preamble is located.
  • the sequence number of the domain resources is ascending, and then multiple preambles are associated one by one to the PUSCH resource units of the N sets of PUSCH resource configurations according to the ascending sequence of the preamble sequence number.
  • the preset first order can be combined with any one of the following four kinds of information, or a combination of any two, or a combination of any three, or a combination of any four, or a combination of five items Combination related: DMRS port sequence number, DMRS sequence sequence number, frequency domain resource sequence number of PUSCH resource unit, time domain resource sequence number of PUSCH resource unit, PUSCH resource configuration sequence number where PUSCH resource unit is located.
  • the preset first sequence may be related to the DMRS port sequence number.
  • the terminal device associates the preamble with the PUSCH resource unit, the association may be performed in ascending order of the DMRS port sequence number.
  • the preset first order may also be related to the DMRS sequence number.
  • the terminal device associates the preamble with the PUSCH resource unit, the association may be performed in ascending order of the DMRS sequence number.
  • the preset first order may also be related to the frequency domain resource sequence number of the PUSCH resource unit.
  • the association may be performed in ascending order of the time domain resource sequence number of the PUSCH resource unit.
  • the preset first order may also be related to the time domain resource sequence number of the PUSCH resource unit.
  • the terminal device associates the preamble with the PUSCH resource unit, the association is performed in ascending order of the time domain resource sequence number of the PUSCH resource unit.
  • the preset first order may also be related to the PUSCH resource configuration sequence number where the PUSCH resource unit is located.
  • the association may be performed according to the PUSCH resource configuration sequence number corresponding to the PUSCH resource unit in ascending order.
  • the preset first sequence may be related to the DMRS port sequence number and the PUSCH resource configuration sequence number where the PUSCH resource unit is located.
  • the terminal device may first perform the association according to the ascending order of the DMRS sequence port, and then according to the ascending order of the PUSCH resource configuration number where the PUSCH resource unit is located.
  • the terminal device associates the preamble with the PUSCH resource unit, it may first perform the association according to the ascending order of the PUSCH resource configuration sequence number where the PUSCH resource unit is located, and then according to the ascending order of the DMRS port sequence number.
  • the preset first sequence may be related to the DMRS port sequence number and the time domain resource sequence number of the PUSCH resource unit.
  • the terminal device may first perform the association according to the ascending order of the DMRS sequence port number, and then according to the ascending order of the time domain resource number of the PUSCH resource unit.
  • the terminal device associates the preamble with the PUSCH resource unit, it may first perform the association according to the time domain resource sequence number of the PUSCH resource unit, and then perform the association according to the ascending sequence of the DMRS sequence port number.
  • the preset first order may be related to the time domain resource sequence number of the PUSCH resource unit and the frequency domain resource sequence number of the PUSCH resource unit.
  • the terminal device may first perform the association according to the ascending order of the time domain resource sequence number of the PUSCH resource unit, and then according to the ascending sequence of the frequency domain resource sequence number of the PUSCH resource unit.
  • the terminal device associates the preamble with the PUSCH resource unit, it may first perform the association according to the ascending order of the frequency domain resource sequence number of the PUSCH resource unit, and then perform the association according to the ascending order of the time domain resource sequence number of the PUSCH resource unit.
  • the preset first sequence may be related to the DMRS port sequence number (or DMRS sequence sequence number), the PUSCH resource configuration sequence number where the PUSCH resource unit is located, and the time domain resource sequence number of the PUSCH resource unit.
  • the terminal device when the terminal device associates the preamble with the PUSCH resource unit, it may first follow the DMRS sequence port (or DMRS sequence number) in ascending order, secondly follow the PUSCH resource configuration sequence number where the PUSCH resource unit is located, and then follow the PUSCH resource unit timing.
  • the domain resource sequence numbers are associated in ascending order.
  • the terminal device when the terminal device associates the preamble with the PUSCH resource unit, it can first follow the PUSCH resource configuration sequence number where the PUSCH resource unit is located in ascending order, then follow the time domain resource sequence number of the PUSCH resource unit in ascending order, and then follow the DMRS port sequence number (or DMRS sequence number ) To associate in ascending order.
  • the terminal device when the terminal device associates the preamble with the PUSCH resource unit, it can also be associated according to other arrangements of the DMRS port sequence number, the PUSCH resource configuration sequence number where the PUSCH resource unit is located, and the time domain resource sequence number of the PUSCH resource unit. One enumerate.
  • the preset first sequence may be related to the DMRS port sequence number (or DMRS sequence sequence number), the frequency domain resource sequence number of the PUSCH resource unit, and the time domain resource sequence number of the PUSCH resource unit.
  • the terminal device may first follow the ascending order of the DMRS port sequence number (or DMRS sequence number), then follow the ascending sequence of the frequency domain resource sequence number of the PUSCH resource unit, and then follow the time domain of the PUSCH resource unit
  • the resource sequence numbers are associated in ascending order.
  • the terminal device when it associates the preamble with the PUSCH resource unit, it may also perform association according to other arrangements of the DMRS port sequence number (or DMRS sequence sequence number), the frequency domain resource sequence number of the PUSCH resource unit, and the time domain resource sequence number of the PUSCH resource unit. , I will not list them all here.
  • the preset first sequence may be related to the DMRS port sequence number and the DMRS sequence sequence number, the frequency domain resource sequence number of the PUSCH resource unit, and the time domain resource sequence number of the PUSCH resource unit.
  • the terminal device when the terminal device associates the preamble with the PUSCH resource unit, it may first follow the ascending sequence of the DMRS port sequence number, then follow the ascending sequence of the DMRS sequence number, then follow the ascending sequence of the frequency domain resource sequence number of the PUSCH resource unit, and then follow the time of the PUSCH resource unit.
  • the domain resource sequence numbers are associated in ascending order.
  • the terminal device when it associates the preamble with the PUSCH resource unit, it may first follow the ascending sequence of the DMRS sequence number, then follow the ascending sequence of the DMRS port sequence number, then follow the ascending sequence of the frequency domain resource sequence number of the PUSCH resource unit, and then follow the time domain of the PUSCH resource unit
  • the resource serial numbers are associated in ascending order, and they are not listed here.
  • the preset first order is related to the combination of the four types of information, that is, the preset first order is related to one of the DMRS port number and the DMRS sequence number, the frequency domain resource number of the PUSCH resource unit, and the time domain resource of the PUSCH resource unit.
  • the sequence number and the PUSCH resource configuration sequence number where the PUSCH resource unit is located will be described as an example. The following exemplarily lists two possible implementation manners:
  • the terminal device when the terminal device associates the preamble with the PUSCH resource unit, it may first follow the PUSCH resource configuration sequence number where the PUSCH resource unit is located in ascending order, then follow the DMRS port sequence number (or DMRS sequence number) in ascending order, and then follow the PUSCH
  • the frequency domain resource sequence numbers of the resource units are in ascending order, and then the association is performed in ascending order of the time domain resource sequence numbers of the PUSCH resource units.
  • the terminal device when the terminal device associates the preamble with the PUSCH resource unit, it may first follow the ascending order of the DMRS port sequence number (or DMRS sequence number), then follow the ascending order of the frequency domain resource sequence number of the PUSCH resource unit, and again follow the PUSCH resource unit
  • the sequence numbers of the time domain resources are ascending, and finally, in ascending order according to the PUSCH resource configuration sequence number where the PUSCH resource unit is located.
  • the combination of the four items of information may also be other permutations and combinations, which will not be listed here.
  • the preset first order is related to the combination of the above five types of information, that is, the preset first order is related to the DMRS port sequence number, the DMRS sequence sequence number, the frequency domain resource sequence number of the PUSCH resource unit, and the time domain resource sequence number of the PUSCH resource unit ,
  • the PUSCH resource configuration sequence number where the PUSCH resource unit is located is described as an example. The following exemplarily lists two possible implementation manners:
  • the terminal device when the terminal device associates the preamble with the PUSCH resource unit, it may first follow the PUSCH resource configuration sequence number in which the PUSCH resource unit is located in ascending order, then follow the ascending sequence of the DMRS port sequence number, then follow the ascending sequence of the DMRS sequence number, and then follow the PUSCH resource
  • the frequency domain resource sequence numbers of the units are in ascending order, and then the association is performed in ascending order according to the time domain resource sequence numbers of the PUSCH resource units.
  • the terminal device may first follow the ascending order of the PUSCH resource configuration sequence number where the PUSCH resource unit is located, then follow the ascending order of the DMRS sequence number, then follow the ascending order of the DMRS port sequence number, then follow the ascending order of the frequency domain resource sequence number of the PUSCH resource unit, and then follow the PUSCH resource unit
  • the time domain resource sequence number is ascending for association.
  • the terminal device when the terminal device associates the preamble with the PUSCH resource unit, it may first follow the ascending order of the DMRS port sequence number, then follow the ascending sequence of the DMRS sequence number, secondly follow the ascending sequence of the frequency domain resource sequence number of the PUSCH resource unit, and again follow the PUSCH resource sequence.
  • the time domain resource sequence numbers of the units are in ascending order, and finally, in ascending order according to the PUSCH resource configuration sequence number where the PUSCH resource unit is located.
  • the terminal device may first follow the ascending sequence of the DMRS sequence number, then follow the ascending sequence of the DMRS port sequence number, then follow the ascending sequence of the frequency domain resource sequence number of the PUSCH resource unit, again follow the ascending sequence of the time domain resource sequence number of the PUSCH resource unit, and finally, follow the PUSCH resource unit location
  • the PUSCH resource configuration sequence number in ascending order.
  • the combination of the five items of information may also be arranged in other ways, which will not be listed here.
  • the process in which the terminal device associates multiple preambles to the PUSCH resource units of the N sets of PUSCH resource configurations according to a preset first order will be described below in combination with a specific manner.
  • the preset first order is: first in ascending order according to the DMRS port number (or DMRS sequence number), second in ascending order according to the frequency domain resource number of the PUSCH resource unit, again in ascending order according to the time domain resource number of the PUSCH resource unit, and finally according to the PUSCH resource
  • the PUSCH resource configuration sequence number where the unit is located in ascending order.
  • three sets of PUSCH resource configurations are used to configure PUSCH resources from 0 to 2 respectively.
  • Each set of PUSCH resource configuration includes 6 PUSCH time-frequency resources, and each PUSCH time-frequency resource is combined with 2 DMRS ports to form 12 PUSCHs.
  • the first order can be as shown in Figure 11A.
  • the preset second order is: first in ascending order of the sequence number of the preamble, then in the ascending order of the frequency domain resource sequence number of the PRACH time-frequency resource where the preamble is located, and then in the ascending order of the time domain resource sequence number of the PRACH time-frequency resource where the preamble is located.
  • each set of PUSCH resource configurations includes 2 PUSCH time-frequency resources, each PUSCH time-frequency
  • the resources are respectively combined with 12 DMRS ports (or 12 DMRS sequences, or a combination of 12 DMRS sequences and DMRS ports) to form 12 PUSCH resource units.
  • there is 1 PRACH time-frequency resource there is 1 PRACH time-frequency resource, and there are a total of 64 preambles (ie preamble#0 ⁇ preamble#63) on the PRACH time-frequency resource.
  • the 64 preambles can be associated with the same SSB or can be associated Unlike SSB, there is no limitation here. These 64 preambles are associated with a total of 72 PUSCH resource units in 3 sets of PUSCH resource configurations. Each preamble maps 1 PUSCH resource unit.
  • the first 24 preambles of the 64 preambles and the 24 PUSCH resource units of PUSCH resource configuration 0 are sequentially mapped in a 1-to-1 manner, and the next 24 preambles
  • the 24 PUSCH resource units of PUSCH resource configuration 1 are sequentially mapped in a 1-to-1 manner, the remaining 16 preambles are mapped sequentially to the first 16 PUSCH resource units of PUSCH resource configuration 2 in a 1-to-1 manner, and PUSCH resource configuration 2
  • the remaining 8 PUSCH resource units are not mapped, as shown in FIG. 11B.
  • mapping relationship between 64 preambles and 72 PUSCH resource units of 3 sets of PUSCH resource configurations may be shown in Table 1, as shown in FIG. 12.
  • the sequence numbers of POs can be arranged in ascending order of frequency domain resource numbers first, and then in ascending order of time domain resources, that is, among the POs configured in the same PUSCH resource configuration, PO#0 has the smallest frequency domain resource sequence number and time domain resource sequence number The smallest, the frequency domain resource sequence number of PO#1 is the second smallest and the time domain resource sequence number is the smallest, ..., and so on.
  • the PUSCH resource unit sequence numbers can be sorted according to the DMRS port sequence number (or DMRS sequence) sequence number in ascending order, that is, in the same PO, the DMRS port sequence number (or DMRS sequence) of PUSCH resource unit #0 is the smallest, and the DMRS port of PUSCH resource unit #1
  • the serial number (or DMRS sequence) is the second smallest, ..., and so on.
  • each set of PUSCH resource configurations includes 2 PUSCH time-frequency resources.
  • the frequency resources are combined with 8 DMRS ports (or 8 DMRS sequences, or a combination of 8 DMRS sequences and DMRS ports) to form 8 PUSCH resource units.
  • there is 1 PRACH time-frequency resource there is 1 PRACH time-frequency resource, and there are a total of 64 preambles (that is, preamble 0-63) on the PRACH time-frequency resource.
  • the 64 preambles can be associated with the same SSB or different SSBs. Not limited here.
  • These 64 preambles are associated with the 32 PUSCH resource units of 2 sets of PUSCH resource configurations, and each preamble is mapped to 0.5 PUSCH resource units, that is, every 2 preambles are mapped to 1 PUSCH resource unit.
  • the first 32 preambles of the 64 preambles and the 16 PUSCH resource units of PUSCH resource configuration 0 are sequentially mapped in a 2-to-1 manner, and the next 32 preambles
  • the 16 PUSCH resource units of PUSCH resource configuration 1 are sequentially mapped in a 2-to-1 manner, as shown in FIG. 13.
  • mapping relationship between 64 preambles and 32 PUSCH resource units of 2 sets of PUSCH resource configurations may be shown in Table 2, as shown in FIG. 14.
  • the preset first order is: first in ascending order according to the PUSCH resource configuration sequence number where the PUSCH resource unit is located, second in ascending order according to the DMRS port sequence number (or DMRS sequence number), then in ascending order according to the frequency domain resource sequence number of the PUSCH resource unit, and then according to the PUSCH resource The time domain resource number of the unit in ascending order.
  • the preset second order is: first in ascending order according to the sequence number of the preamble, then in ascending order according to the frequency domain resource sequence number of the PRACH time-frequency resource where the preamble is located, and then in ascending order according to the time domain resource sequence number of the PRACH time-frequency resource where the preamble is located.
  • each set of PUSCH resource configurations includes 2 PUSCH time-frequency resources, each PUSCH time-frequency
  • the resources are respectively combined with 12 DMRS ports (or 12 DMRS sequences, or a combination of 12 DMRS sequences and DMRS ports) to form 12 PUSCH resource units.
  • there is 1 PRACH time-frequency resource there is 1 PRACH time-frequency resource, and there are a total of 64 preambles (ie preamble#0 ⁇ 63) on the PRACH time-frequency resource.
  • these 64 preambles can be associated with the same SSB or different SSBs. , Not limited here. These 64 preambles are associated with 72 PUSCH resource units of 3 sets of PUSCH resource configurations. Each preamble can map 1 PUSCH resource unit.
  • preamble 0 is mapped to PUSCH resource unit 0 of PUSCH resource configuration 0
  • preamble 1 is mapped to PUSCH resource unit 0 of PUSCH resource configuration 1
  • preamble 2 is mapped to PUSCH resource configuration 0
  • preamble 3 is mapped to PUSCH resource unit 1 of PUSCH resource configuration 1, and so on.
  • mapping relationship between 64 preambles and 72 PUSCH resource units of 3 sets of PUSCH resource configurations may be as shown in Table 3, as shown in FIG. 15.
  • each set of PUSCH resource configurations includes 2 PUSCH time-frequency resources.
  • the frequency resources are respectively combined with 8 DMRS ports (or 8 DMRS sequences, or a combination of 8 DMRS sequences and DMRS ports) to form 8 PUSCH resource units.
  • there is 1 PRACH time-frequency resource there is 1 PRACH time-frequency resource, and there are a total of 64 preambles (that is, preamble 0-63) on the PRACH time-frequency resource.
  • the 64 preambles can be associated with the same SSB or different SSBs. Not limited here. Associate these 64 preambles to the 32 PUSCH resource units of 2 sets of PUSCH resource configurations, and each preamble can map 0.5 PUSCH resource units, that is, every 2 preambles can map 1 PUSCH resource unit.
  • preamble 0 and 1 are mapped to PUSCH resource unit 0 of PUSCH resource configuration 0
  • preamble 2 and 3 are mapped to PUSCH resource unit 0 of PUSCH resource configuration 1
  • preamble 4 And 5 are mapped to PUSCH resource unit 1 of PUSCH resource configuration 0
  • preambles 6 and 7 are mapped to PUSCH resource unit 1 of PUSCH resource configuration 1, and so on.
  • mapping relationship between the 64 preambles and the 32 PUSCH resource units of the 2 sets of PUSCH resource configurations may be shown in Table 4 and shown in FIG. 16.
  • a total of A preambles on N PRACH time-frequency resources are mapped with a total of B PUSCH resource units on M sets of PUSCH resource configurations, and each k preamble maps 1 PUSCH resource unit.
  • preamble i is mapped to the number
  • the number of the PUSCH resource configuration is Resource unit.
  • Each PUSCH time-frequency resource of the PUSCH resource configuration is combined with c DMRS ports (or c DMRS sequences, or c combinations of DMRS sequences and DMRS ports) to form c PUSCH resource units, then the number is The number of the PUSCH resource configuration is The number of resource units belonging to the PUSCH resource configuration is The number in the PUSCH time-frequency resource is The PUSCH resource unit.
  • the terminal device uses other preset second sequences and other preset first sequences to associate the preamble with the PUSCH resource unit.
  • the process is similar to the above method. For details, please refer to the above description, and the repetition will not be repeated.
  • the embodiment of the present application provides another method for determining random access resources.
  • the method may be applied to the communication system shown in FIG. 1.
  • the method may be applied to a terminal device.
  • Terminal equipment can use a two-step random access process to access network equipment.
  • the method for determining the random access resource may specifically include: for each preamble of the multiple preambles, the terminal device maps the preamble to N sets of uplink channel resource configurations independently, and N is an integer greater than 1. Among them, one of the three configurations of the time-frequency resource, DMRS port, and DMRS sequence of each set of PUSCH resource configuration is different, or the two are different, or the three are different.
  • the mapping ratio between the preamble and the PUSCH resource units configured for each set of PUSCH resource configurations can be the same or different, and can be configured by network equipment It may also be determined according to the number of PUSCH resource units and the number of preambles configured for each set of PUSCH resource configuration.
  • the terminal device may determine the number of PUSCH resource units corresponding to each preamble for each PUSCH resource configuration in the N sets of PUSCH resource configurations, and combine multiple PUSCH resource units based on the number of PUSCH resource units corresponding to each preamble.
  • the preamble is mapped to the PUSCH resource configuration.
  • the terminal device may determine the number of PUSCH time-frequency resources corresponding to each preamble based on the number of PUSCH resource units included in the PUSCH resource configuration and the total number of multiple preambles.
  • the uplink channel refers to the time-frequency resource carrying data, for example, the uplink channel may be the PUSCH.
  • the uplink channel may refer to the "MsgA PUSCH physical channel".
  • the uplink channel is referred to as PUSCH resource below.
  • each set of PUSCH resource configuration may include, but is not limited to, one or more of MCS, TBS, PUSCH time domain resource configuration, PUSCH frequency domain resource configuration, repeated transmission configuration, and DMRS configuration.
  • the terminal device can select the target PUSCH resource configuration among N sets of PUSCH resource configurations according to the data packet size, channel conditions, etc., where the target PUSCH resource configuration can meet at least one of the MCS, TBS, time-frequency resource size and other parameters expected by the terminal device One item.
  • the terminal device can select a preamble from the preamble associated with the target PUSCH resource configuration as the preamble part of the MsgA to send to the network device, and carry the data part on the PUSCH time-frequency configured by the target PUSCH resource configuration The resources are sent to the network device using the parameters configured by the target PUSCH resource configuration.
  • the network device can detect the DMRS port (or DMRS sequence, or DMRS port and DMRS sequence) associated with the preamble on the PUSCH time-frequency resource associated with the preamble.
  • the time-frequency resources configured for each set of PUSCH resources are different, if a network device detects a DMRS port (or a DMRS sequence, or a DMRS port and a DMRS sequence) on a certain PUSCH time-frequency resource, the configuration can be determined
  • the PUSCH resource configuration of the PUSCH time-frequency resource is the PUSCH resource configuration adopted by the terminal device, so the data part sent by the terminal device can be received according to the PUSCH resource configuration.
  • the network device detects the DMRS port associated with the preamble on a certain PUSCH time-frequency resource (Or DMRS sequence, or DMRS port and DMRS sequence), it can be determined to configure the PUSCH time-frequency resource and the PUSCH resource configuration of the DMRS port (or DMRS sequence, or DMRS port and DMRS sequence) as the PUSCH resource configuration used by the terminal device Therefore, the data part sent by the terminal device can be received according to the PUSCH resource configuration.
  • the network equipment and the terminal equipment have the same understanding of the association relationship between the preamble and the PUSCH resource configuration.
  • the network device and the terminal device can use the same method to establish the association relationship between the preamble and the PUSCH resource configuration.
  • the network device does not need to explicitly configure the preamble group information for multiple sets of PUSCH resource configuration.
  • the terminal device maps the PUSCH resource unit configured for each set of PUSCH resources to the preamble independently.
  • One or more of the three configurations of PUSCH time-frequency resource, DMRS port, and DMRS sequence are different for each set of PUSCH resource configuration. Therefore, the terminal device can use one of the three configurations of PUSCH time-frequency resource, DMRS port, and DMRS sequence.
  • One or more items are used to inform the network device which set of PUSCH resources it uses, so as to save the signaling overhead of configuring the preamble packet information.
  • the method described in the third embodiment of the present application can reduce the collision probability of each group of preambles when two terminal devices select the same PUSCH resource configuration.
  • each PUSCH resource configuration includes 4 PUSCH time-frequency resources, each PUSCH time-frequency resource and 12 DMRS ports (or 12 DMRS sequences, or a combination of 12 DMRS sequences and DMRS ports) constitute 12 PUSCH resource units .
  • the 64 preambles are independently mapped to the 48 PUSCH resource units of each PUSCH resource configuration of the 2 sets of PUSCH resource configurations, that is, 64 preambles are mapped to the 48 PUSCH resource units of PUSCH resource configuration 0, and these 64 The preamble is then mapped with the 48 PUSCH resource units of PUSCH resource configuration 1.
  • Each of the 64 preambles is mapped to the PUSCH resource unit of two sets of PUSCH resource configurations.
  • One or more of the time-frequency resource, DMRS port, and DMRS sequence of the two sets of PUSCH resource configurations are different.
  • the network device After detecting a preamble, the network device detects the preamble association on the PUSCH time-frequency resource associated with the preamble DMRS port (or detect DMRS sequence, or detect DMRS port and DMRS sequence), thereby judging which PUSCH resource configuration the preamble is associated with according to the detected DMRS port (or detect DMRS sequence, or detect DMRS port and DMRS sequence).
  • the embodiment of the present application provides an apparatus for determining random access resources.
  • the structure of the apparatus for determining random access resources may be as shown in FIG. 17, including a processing unit 1701 and a transceiver unit 1702.
  • the device for determining random access resources can be specifically used to implement the method executed by the terminal device in the embodiments of FIG. 4 to FIG. 9.
  • the device may be the terminal device itself, or the chip or chip in the terminal device. A chip set or part of a chip used to perform related method functions.
  • the transceiver unit 1702 is used to receive N sets of uplink channel resource configurations, each set of uplink channel resource configurations is used to configure one or more uplink channel resource units, and the uplink channel resource unit is an uplink channel time-frequency resource, or uplink channel resource
  • the unit is a combination of an uplink channel time-frequency resource and a demodulation reference signal port, or the uplink channel resource unit is a combination of an uplink channel time-frequency resource and a demodulation reference signal sequence, or the uplink channel resource unit is an uplink A combination of channel time-frequency resources, a demodulation reference signal port, and a demodulation reference signal sequence, where N is an integer greater than 1.
  • the processing unit 1701 is configured to divide the multiple preambles on each random access time-frequency resource associated with the synchronization signal block into N groups according to N sets of uplink channel resource configurations, and the N sets of preambles and N sets of uplink channel resource configurations One-to-one correspondence; determine the target uplink channel resource configuration in the N sets of uplink channel resource configurations; determine a preamble in the preamble group corresponding to the target uplink channel resource configuration.
  • the processing unit 1701 when dividing the multiple preambles on each random access time-frequency resource associated with the synchronization signal block into N groups according to N sets of uplink channel resource configurations, it may be specifically configured to: The number of uplink channel resource units configured by a set of uplink channel resource configurations and the total number of multiple preambles determine the number of preambles corresponding to each set of uplink channel resource configurations, and the number of preambles corresponding to N sets of uplink channel resource configurations will The multiple preambles are divided into N groups.
  • the processing unit 1701 may specifically determine the number of preambles corresponding to each set of uplink channel resource configurations according to the number of uplink channel resource units configured separately for N sets of uplink channel resource configurations and the total number of multiple preambles. Used for: determining the preamble corresponding to each set of uplink channel resource configuration according to the number of uplink channel resource units configured in each set of uplink channel resource configuration in the first time period and the total number of multiple preambles in N sets of uplink channel resource configurations Quantity.
  • the processing unit 1701 may also determine the number of preambles corresponding to each set of uplink channel resource configurations according to the number of uplink channel resource units configured separately for N sets of uplink channel resource configurations and the total number of multiple preambles. Specifically used to determine the preamble corresponding to each set of uplink channel resource configuration according to the average number of uplink channel resource units configured in each set of uplink channel resource configuration in the N sets of uplink channel resource configuration and the total number of multiple preambles Quantity.
  • the processing unit 1701 when dividing the multiple preambles on each random access time-frequency resource associated with the synchronization signal block into N groups according to N sets of uplink channel resource configurations, it may be specifically configured to: The total number N and the total number of multiple preambles divide the multiple preambles into N groups evenly.
  • the device for determining random access resources can be specifically used to implement the method executed by the terminal device in the embodiments of FIG. 10 to FIG. 16.
  • the device may be the terminal device itself or the chip in the terminal device. Or a part of the chipset or chip used to perform related method functions.
  • the transceiver unit 1702 is configured to receive N sets of uplink channel resource configurations. Each set of uplink channel resource configurations is used to configure one or more uplink channel resource units.
  • the uplink channel resource unit is an uplink channel time-frequency resource, or an uplink channel
  • the resource unit is a combination of an uplink channel time-frequency resource and a demodulation reference signal port, or the uplink channel resource unit is a combination of an uplink channel time-frequency resource and a demodulation reference signal sequence, or an uplink channel resource unit is a combination of A combination of uplink channel time-frequency resources, a demodulation reference signal port, and a demodulation reference signal sequence, where N is an integer greater than 1.
  • the processing unit 1701 is configured to associate multiple preambles with the uplink channel resource units of the N sets of uplink channel resource configurations received by the transceiver unit in a preset order.
  • the processing unit may be specifically configured to associate multiple preambles one by one with the uplink channel resource units of the N sets of uplink channel resource configurations in ascending order of the preamble sequence number.
  • the preset sequence is related to at least one of the following four types of information: demodulation reference signal port sequence number, demodulation reference signal sequence number, uplink channel resource unit frequency domain resource sequence number, uplink channel resource unit time The domain resource sequence number, and the uplink channel resource configuration sequence number where the uplink channel resource unit is located.
  • the processing unit may be specifically configured to: when associating the preamble with the uplink channel resource unit, perform the association in ascending order according to the uplink channel resource configuration sequence number corresponding to the uplink channel resource unit. And/or, when associating the preamble with the uplink channel resource unit, the association is performed in ascending order of the demodulation reference signal port number. And/or, when associating the preamble with the uplink channel resource unit, the association is performed in ascending order of the sequence number of the demodulation reference signal. And/or, when associating the preamble with the uplink channel resource unit, the association is performed in ascending order of the frequency domain resource sequence number of the uplink channel resource unit. And/or, when associating the preamble with the uplink channel resource unit, the association is performed in ascending order of the time domain resource sequence number of the uplink channel resource unit.
  • the processing unit may be specifically used to associate the preamble with the uplink channel resource unit in sequence according to the following four rules: first, according to the uplink channel resource configuration sequence number corresponding to the uplink channel resource unit in ascending order , Secondly follow the ascending sequence of the demodulation reference signal port serial number or the ascending sequence of the demodulation reference signal sequence number, again follow the ascending sequence of the frequency domain resource sequence number of the uplink channel resource unit, and finally follow the ascending sequence of the time domain resource sequence number of the uplink channel resource unit.
  • the device for determining random access resources may be specifically used to implement the method executed by the network device in the embodiments of FIG. 10 to FIG. 16.
  • the device may be the network device itself or a chip in the network device. Or a part of the chipset or chip used to perform related method functions.
  • the transceiver unit 1702 is used to receive the preamble from the terminal device.
  • the processing unit 1701 is configured to determine the target uplink channel resource configuration according to the association relationship between the preamble and the uplink channel resource configuration.
  • the association relationship between the preamble and the uplink channel resource configuration is similar to the process of the terminal device determining the association relationship between the preamble and the uplink channel resource configuration.
  • the association relationship between the preamble and the uplink channel resource configuration is similar to the process of the terminal device determining the association relationship between the preamble and the uplink channel resource configuration.
  • the transceiving unit 1702 can also be used to receive data sent by the terminal device according to the target uplink channel resource configuration.
  • the division of modules in the embodiments of the present application is illustrative, and is only a logical function division. In actual implementation, there may be other division methods.
  • the functional modules in the various embodiments of the present application may be integrated into one process. In the device, it can also exist alone physically, or two or more modules can be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It can be understood that the function or implementation of each module in the embodiment of the present application may further refer to the related description of the method embodiment.
  • the apparatus for determining random access resources may be as shown in FIG. 18, and the apparatus may be a communication device or a chip in a communication device.
  • the device may include a processor 1801, a communication interface 1802, and a memory 1803.
  • the processing unit 1701 may be a processor 1801.
  • the transceiving unit 1702 may be a communication interface 1802.
  • the processor 1801 may be a central processing unit (central processing unit, CPU), or a digital processing unit, and so on.
  • the communication interface 1802 may be a transceiver, an interface circuit such as a transceiver circuit, etc., or a transceiver chip, and so on.
  • the device also includes a memory 1803, which is used to store programs executed by the processor 1801.
  • the memory 1803 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., and may also be a volatile memory, such as random access memory (random access memory). -access memory, RAM).
  • the memory 1803 is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • the processor 1801 is configured to execute the program code stored in the memory 1803, and is specifically configured to execute the actions of the above-mentioned processing unit 1701, which will not be repeated in this application.
  • the communication interface 1802 is specifically configured to perform the actions of the above-mentioned transceiver unit 1702, which will not be repeated in this application.
  • the embodiment of the present application does not limit the specific connection medium between the communication interface 1802, the processor 1801, and the memory 1803.
  • the memory 1803, the processor 1801, and the communication interface 1802 are connected by a bus 1804.
  • the bus is represented by a thick line in FIG. 18.
  • the connection mode between other components is only for schematic illustration. , Is not limited.
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used to represent in FIG. 18, but it does not mean that there is only one bus or one type of bus.
  • the embodiment of the present invention also provides a computer-readable storage medium for storing computer software instructions required to execute the above-mentioned processor, which contains a program required to execute the above-mentioned processor.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, an SSD).
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention concerne un procédé et un dispositif pour déterminer des ressources d'accès aléatoire, qui sont utilisés pour résoudre le problème des techniques antérieures consistant, lorsque plusieurs jeux de configurations de ressources PUSCH sont configurés dans un accès aléatoire en deux étapes, à définir comment un dispositif terminal va déterminer une ressource d'accès aléatoire de telle façon qu'un dispositif de réseau connaisse la configuration de ressources PUSCH utilisée par le dispositif terminal. Le procédé comprend les étapes suivantes au cours desquelles : un dispositif de communication divise de multiples préambules sur chaque ressource temps-fréquence d'accès aléatoire associée à un bloc de signaux de synchronisation en N groupes en fonction de N jeux de configurations de ressources de canal montant, N étant un nombre entier supérieur à 1, et les N jeux de préambules étant en correspondance biunivoque avec N jeux de configurations de ressources de canal montant ; et le dispositif de communication détermine une configuration cible de ressources de canal montant dans les N jeux de configurations de ressources de canal montant, et détermine un préambule dans un groupe de préambules correspondant à la configuration cible de ressources de canal montant.
PCT/CN2019/100886 2019-08-15 2019-08-15 Procédé et dispositif de détermination de ressources d'accès aléatoire WO2021026931A1 (fr)

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CN201980099344.3A CN114246012A (zh) 2019-08-15 2019-08-15 一种确定随机接入资源的方法及装置
PCT/CN2019/100886 WO2021026931A1 (fr) 2019-08-15 2019-08-15 Procédé et dispositif de détermination de ressources d'accès aléatoire

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