WO2021032027A1 - Procédé d'accès aléatoire, dispositif terminal et dispositif de réseau - Google Patents

Procédé d'accès aléatoire, dispositif terminal et dispositif de réseau Download PDF

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Publication number
WO2021032027A1
WO2021032027A1 PCT/CN2020/109379 CN2020109379W WO2021032027A1 WO 2021032027 A1 WO2021032027 A1 WO 2021032027A1 CN 2020109379 W CN2020109379 W CN 2020109379W WO 2021032027 A1 WO2021032027 A1 WO 2021032027A1
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Prior art keywords
time
subband
pusch
resource
prach
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PCT/CN2020/109379
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English (en)
Chinese (zh)
Inventor
行双双
吴艺群
柴晓萌
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华为技术有限公司
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Publication of WO2021032027A1 publication Critical patent/WO2021032027A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows

Definitions

  • This application relates to the field of communication technology, and in particular to a random access method, terminal equipment and network equipment.
  • 2-step random access channel (2-step random access channel, 2-step RACH) is proposed as a solution to reduce delay , Thereby speeding up the process of random access.
  • a complete 2-step RACH process is shown in Figure 1, including the first step: the terminal device sends a message A (message A, MsgA) to the network device, and the message A includes a physical random access channel (PRACH) Preamble is carried in the physical uplink shared channel (PUSCH) PRACH; Step 2: The terminal device receives the response of the network device to MsgA, that is, message B (message B, MsgB), the response of MsgB The content includes at least one of a response to the preamble and a response to the PUSCH.
  • MsgA messages A
  • PRACH physical random access channel
  • PUSCH physical uplink shared channel
  • the network device In a new radio (NR) scenario, before the terminal device sends the MsgA to the network device, the network device broadcasts PRACH configuration resources and PUSCH configuration resources to the terminal device.
  • NR in unlicensed spectrum
  • the resource configuration information of the PUSCH needs to include an indication of the interlace occupied in the frequency domain, but the number of the interlace in multiple subbands is the same, which makes it impossible for the terminal device to determine the location of the subband for transmitting the PUSCH.
  • the embodiments of the present application provide a random access method, terminal equipment, and network equipment, which can enable the terminal equipment to clarify the subband position of the PUSCH and improve the efficiency of the terminal equipment in sending random access messages.
  • a random access method including: a terminal device receives random access configuration information sent by a network device, the random access configuration information includes resource configuration information of a physical random access channel PRACH and a physical uplink shared channel PUSCH
  • the resource configuration information of the PUSCH includes the indication information for configuring the subband of the frequency domain resource of each PUSCH time-frequency resource; the terminal device sends a random access message to the network device, where the random access
  • the incoming message includes at least one of PRACH and PUSCH.
  • PRACH time-frequency resources occupied by PRACH are determined according to PRACH resource configuration information
  • PUSCH time-frequency resources occupied by PUSCH are determined according to PUSCH resource configuration information.
  • the terminal device can determine the random access message to be sent according to the indication information of the subband where the frequency domain resource of each PUSCH time-frequency resource is contained in the random access configuration information.
  • the indication information used to configure the subband where each PUSCH time-frequency resource is located includes: the index number of the subband where the frequency domain starting position of each PUSCH time-frequency resource is located and the index number of each PUSCH time-frequency resource.
  • the number of subbands where frequency resources are located; or the index number of the subband where the frequency domain termination position of each PUSCH time-frequency resource is located and the number of subbands where each PUSCH time-frequency resource is located; or each subband where each PUSCH frequency domain resource is located The index number of the band; or the bitmap, where each bit in the bitmap corresponds to a subband, and the first value of each bit indicates that the subband corresponding to the bit is each PUSCH time-frequency A subband where the resource is located, and the second value of each bit indicates that the subband corresponding to the bit is not the subband where the PUSCH time-frequency resource is located.
  • the resource configuration information of PUSCH further includes: the number of interlaced units included in the frequency domain resources of each PUSCH time-frequency resource and/or the number of interlaced units included in the frequency domain resources of each PUSCH time-frequency resource The index number; an interleaving unit includes at least one physical resource block PRB.
  • PUSCH resource configuration information may also include: time domain resource period, an indication of the starting position of each time domain resource period, an indication of the number of PUSCH time-frequency resources in each time domain resource period, The indication of the time domain length of each PUSCH time-frequency resource, the indication of the frequency domain start position of the PUSCH frequency domain resource, the indication of the frequency domain size of each PUSCH time-frequency resource, and the frequency division complex contained in the PUSCH frequency domain resource An indication of the number of PUSCH time-frequency resources used; or, the resource configuration of PUSCH also includes: a time-domain offset indicator, which is used to indicate the time-domain offset of the starting position of each PUSCH time-frequency resource relative to each PRACH time-frequency resource Shift; the time domain offset of each PUSCH time-frequency resource; the time domain length of the PUSCH time-frequency resource; the number of time-domain PO resources associated with the start position of the PUSCH time-domain resource; the frequency-domain start of the PUSCH frequency domain resource An
  • the resource configuration information of the PUSCH may also include: demodulation reference signal DMRS configuration information, and the DMRS configuration information includes at least one of DMRS ports and DMRS sequences available for configuring each PUSCH time-frequency resource .
  • the PUSCH time-frequency resource and a DMRS port or DMRS sequence on the PUSCH time-frequency resource constitute a PUSCH resource unit PRU.
  • the terminal device can randomly select among the PRU resources in at least one subband or select a PRU resource according to certain preset rules to send PUSCH .
  • the terminal LBT efficiency can be improved, and the PUSCH transmission efficiency in MsgA can be improved.
  • one PRACH time-frequency resource is associated with at least one preamble sequence
  • one preamble sequence in the at least one preamble sequence is associated with one or more PUSCH resource units.
  • the terminal device sending the random access message to the network device includes: the terminal device determines the first PRACH time-frequency resource used to send the PRACH and the first PUSCH time-frequency resource associated with the first PRACH time-frequency resource The time domain interval of the resource, the first PUSCH time-frequency resource is one of the one or more PUSCH time-frequency resources associated with the first PRACH time-frequency resource; if the terminal device determines that the time-domain interval is less than or equal to the threshold If the first PRACH time-frequency resource is located in the same sub-band as the first PUSCH time-frequency resource, the terminal device performs listen-before-speak (LBT) on the sub-band corresponding to the first PRACH time-frequency resource.
  • LBT listen-before-speak
  • the terminal device when the LBT is successfully performed, the terminal device sends a PRACH to the network device on the first PRACH resource, and sends a PUSCH to the network device on the first PUSCH time-frequency resource; if the terminal device determines that the time domain interval is greater than the threshold, Then the terminal device performs LBT on the subband where the first PRACH time-frequency resource is located, and when the LBT is successfully performed, sends PRACH on the first PRACH time-frequency resource; for the subband where one or more PUSCH time-frequency resources are located Perform LBT, and select one PUSCH time-frequency resource to send the PUSCH on one or more PUSCH time-frequency resources included in the subband where the LBT is successfully executed.
  • the terminal can directly send the PUSCH without performing LBT snooping on PUSCH resources, which reduces the number of LBT snooping times on the time-frequency resources that need to be used for MsgA in the 2-step RACH.
  • the random access configuration information further includes: first indication information of the subband where the time-frequency resource for receiving the random access response message is located. This is because when the frequency domain resource of PUSCH contains multiple subbands, when the terminal device sends MsgA, when the frequency domain resources where PRACH and PUSCH are located are in different subbands, the network device also needs to consider selecting one of the multiple subbands when sending response information. The problem of sub-band transmission.
  • the method further includes: the terminal device monitors the response message for the random access message on the subband indicated by the first indication information. It can also be said that the terminal device monitors the MsgB on the subband indicated by the first indication information.
  • the subband indicated by the first indication information may be a preset subband, that is, the terminal device may monitor the response message for the random access message on the preset subband.
  • the method further includes: the terminal device monitors the response message for the random access message on a preset subband; where the preset subband and the PUSCH time-frequency resource used to send the PUSCH are located One subband or multiple subbands in the subband is the same; or, the preset subband is the same as one subband or multiple subbands in the subband where the PRACH time-frequency resource used to transmit the PRACH is located.
  • the response time window for the terminal device to receive the response message of the random access message includes multiple time periods, and different time periods do not overlap in time, and the subband corresponding to each time period is used for receiving random access messages.
  • the message includes: according to the sequence of multiple time periods in the response time window, the terminal device monitors the response message for the random access message on the subband corresponding to the time period in each time period; where, if the terminal device is in the first If the response message for the random access message is not monitored on the subband corresponding to a time period, the terminal device continues to try to monitor the response message for the random access message on the subband corresponding to the next time period of the first time period.
  • the response time window can be divided to correspond to multiple subbands, and the network device can try to send the response message on the corresponding subband within the corresponding time period.
  • the terminal device also listens to the response information on the corresponding subband in the corresponding time period, which can prevent a certain subband from being occupied for a long time and cause the response message to fail to send, and it also prevents the terminal device from being in multiple subbands at the same time.
  • the upper listening response message reduces the complexity of detecting the response message by the terminal device and the power consumption of the terminal.
  • the resource configuration information of the PRACH also includes indication information for configuring the subband of the frequency domain resource of each PRACH time-frequency resource.
  • the indication information used to configure the subband where the frequency domain resource of each PRACH time-frequency resource is located includes: the index number of the subband where the frequency domain start position of each PRACH time-frequency resource is located and each The number of subbands where each PRACH time-frequency resource is located; or, the index number of the subband where the frequency domain termination position of each PRACH time-frequency resource is located and the number of subbands where each PRACH time-frequency resource is located; or, each PRACH frequency domain
  • At least one PRACH time-frequency resource determined according to PRACH resource configuration information and at least one PUSCH time-frequency resource determined according to PUSCH resource configuration information have the following relationship: at least one PRACH time-frequency resource
  • One PRACH time-frequency resource in at least one PUSCH time-frequency resource is associated with multiple PUSCH time-frequency resources in at least one PUSCH time-frequency resource; or, one of each PRACH time-frequency resource in at least one PRACH time-frequency resource and at least one PUSCH time-frequency resource PUSCH time-frequency resources are associated; or, multiple PRACH time-frequency resources in at least one PRACH time-frequency resource are associated with one PUSCH time-frequency resource in at least one PUSCH time-frequency resource.
  • a random access method including: a network device sends random access configuration information to a terminal device, the random access configuration information includes resource configuration information of a physical random access channel PRACH and resources of a physical uplink shared channel PUSCH Configuration information, where PUSCH resource configuration information includes indication information for configuring the subband of the frequency domain resource of each PUSCH time-frequency resource; the network device determines the PRACH time-frequency resource according to the PRACH resource configuration information and PUSCH resource configuration information And PUSCH time-frequency resources; network equipment receives PRACH on PRACH time-frequency resources, and receives PUSCH on PUSCH time-frequency resources.
  • the beneficial effects of the second aspect can be referred to the first aspect, which will not be repeated here.
  • the indication information used to configure the subband where each PUSCH time-frequency resource is located includes: the index number of the subband where the frequency domain starting position of each PUSCH time-frequency resource is located and the index number of each PUSCH time-frequency resource.
  • the number of subbands where frequency resources are located; or, the index number of the subband where the frequency domain termination position of each PUSCH time-frequency resource is located and the number of subbands where each PUSCH time-frequency resource is located; or each PUSCH frequency domain resource is located The index number of the subband; or, a bitmap, where each bit in the bitmap corresponds to a subband, and the first value of each bit indicates that the subband corresponding to the bit is each PUSCH For a subband where the time-frequency resource is located, the second value of each bit indicates that the subband corresponding to the bit is not the subband where the PUSCH time-frequency resource is located.
  • the resource configuration information of PUSCH further includes: the number of interlaced units included in the frequency domain resources of each PUSCH time-frequency resource and/or the number of interlaced units included in the frequency domain resources of each PUSCH time-frequency resource The index number; an interleaving unit includes at least one physical resource block PRB.
  • one PRACH time-frequency resource is associated with at least one preamble sequence
  • one preamble sequence in the at least one preamble sequence is associated with one or more PUSCH resource units.
  • the random access configuration information further includes: first indication information of the subband where the time-frequency resource used by the network device to send the random access response message is located.
  • the method further includes: the network device sends a response message for the random access message on the subband indicated by the first indication information.
  • the method further includes: the network device sends a response message to the random received message on a preset subband; wherein the preset subband is related to the subband where the PUSCH time-frequency resource used to send the PUSCH is located.
  • the preset subband is related to the subband where the PUSCH time-frequency resource used to send the PUSCH is located.
  • One subband or multiple subbands in the band are the same; or, the preset subband is the same as one subband or multiple subbands in the subband where the PRACH time-frequency resource used to transmit the PRACH is located.
  • the response time window of the response message of the network device sending the random access message includes multiple time periods, and different time periods do not overlap in time, and the subband corresponding to each time period is used for receiving random access messages.
  • the network device executes LBT on the subband corresponding to the time period in the order of multiple time periods in the response time window, so as to send random access messages on the subband where the LBT is successfully executed The response message; where, if the network device fails to perform LBT on the subband corresponding to the first time period, the network device continues to try to perform LBT on the subband corresponding to the next time period in the first time period to perform LBT
  • the response message for the random access message is sent on the successful subband.
  • the resource configuration information of the PRACH also includes indication information for configuring the subband of the frequency domain resource of each PRACH time-frequency resource.
  • a terminal device which is characterized by comprising: a receiving module configured to receive random access configuration information sent by a network device, where the random access configuration information includes resource configuration information and physical random access channel PRACH
  • the resource configuration information of the uplink shared channel PUSCH where the resource configuration information of the PUSCH includes indication information for configuring the subband of the frequency domain resource of each PUSCH time-frequency resource
  • the sending module is used to send random access to the network device Incoming message, where the random access message includes at least one of PRACH and PUSCH, the PRACH time-frequency resource occupied by PRACH is determined according to the resource configuration information of PRACH, and the PUSCH time-frequency resource occupied by PUSCH is determined according to the resource configuration of PUSCH
  • the information is certain.
  • the indication information used to configure the subband where each PUSCH time-frequency resource is located includes: the index number of the subband where the frequency domain starting position of each PUSCH time-frequency resource is located and the index number of each PUSCH time-frequency resource.
  • the number of subbands where frequency resources are located; or, the index number of the subband where the frequency domain termination position of each PUSCH time-frequency resource is located and the number of subbands where each PUSCH time-frequency resource is located; or, where each PUSCH frequency domain resource is located The index number of each subband; or bitmap, where each bit in the bitmap corresponds to a subband, and the first value of each bit indicates that the subband corresponding to the bit is each A subband where the PUSCH time-frequency resource is located, and the second value of each bit indicates that the subband corresponding to the bit is not the subband where the PUSCH time-frequency resource is located.
  • the resource configuration information of PUSCH further includes: the number of interlaced units included in the frequency domain resources of each PUSCH time-frequency resource and/or the number of interlaced units included in the frequency domain resources of each PUSCH time-frequency resource The index number; an interleaving unit includes at least one physical resource block PRB.
  • one PRACH time-frequency resource is associated with at least one preamble sequence
  • one preamble sequence in the at least one preamble sequence is associated with one or more PUSCH resource units.
  • it further includes a processing module for determining the first PRACH time-frequency resource used to send the PRACH and the time domain interval of the first PUSCH time-frequency resource associated with the first PRACH time-frequency resource.
  • a PUSCH time-frequency resource is one PUSCH time-frequency resource among one or more PUSCH time-frequency resources associated with the first PRACH time-frequency resource; the sending module is used to determine that the time domain interval is less than or equal to the threshold, and
  • the subband where the first PRACH time-frequency resource is located is the same as the subband where the first PUSCH time-frequency resource is located, then LBT is performed on the subband corresponding to the first PRACH time-frequency resource.
  • the PRACH is sent to the network device on the first PRACH resource, and the PUSCH is sent to the network device on the first PUSCH time-frequency resource; if it is determined that the time domain interval is greater than the threshold, the subband where the first PRACH time-frequency resource is located Perform LBT, when LBT is successfully performed, PRACH is sent on the first PRACH time-frequency resource; when LBT is performed on the subband where one or more PUSCH time-frequency resources are located, when the PUSCH on the subband where LBT is successfully performed PUSCH is sent on the frequency resource.
  • the random access configuration information further includes: first indication information of the subband where the time-frequency resource for receiving the random access response message is located.
  • the receiving module is further configured to: monitor the response message for the random access message on the subband indicated by the first indication information.
  • the receiving module is also used to: monitor the response message for the random access message on the preset subband; where the preset subband and the subband of the PUSCH time-frequency resource used to transmit the PUSCH are located One subband or multiple subbands in the band are the same; or, the preset subband is the same as one subband or multiple subbands in the subband where the PRACH time-frequency resource used to transmit the PRACH is located.
  • the response time window of the response message for receiving the random access message includes multiple time periods, and different time periods do not overlap in time, and the subband corresponding to each time period is used for receiving random access A subband or multiple subbands in the subband where the time-frequency resource of the response information is located; the receiving module is used to: in accordance with the order of multiple time periods in the response time window, in each time period, the corresponding time period The response message for the random access message is monitored on the subband; among them, if the response message for the random access message is not monitored on the subband corresponding to the first time period, the next time period of the first time period corresponds to Continue to try to monitor the response message for the random access message on the subband.
  • the resource configuration information of the PRACH also includes indication information for configuring the subband of the frequency domain resource of each PRACH time-frequency resource.
  • a network device including: a sending module for sending random access configuration information to a terminal device, where the random access configuration information includes resource configuration information of a physical random access channel PRACH and a physical uplink shared channel PUSCH Resource configuration information, where the PUSCH resource configuration information includes indication information for configuring the subband where the frequency domain resource of each PUSCH time-frequency resource is located; the processing module is used to determine according to the PRACH resource configuration information and the PUSCH resource configuration information PRACH time-frequency resources and PUSCH time-frequency resources; the receiving module is used to receive PRACH on PRACH time-frequency resources and PUSCH on PUSCH time-frequency resources.
  • the indication information used to configure the subband where each PUSCH time-frequency resource is located includes: the index number of the subband where the frequency domain starting position of each PUSCH time-frequency resource is located and the index number of each PUSCH time-frequency resource.
  • the number of subbands where frequency resources are located; or, the index number of the subband where the frequency domain termination position of each PUSCH time-frequency resource is located and the number of subbands where each PUSCH time-frequency resource is located; or, where each PUSCH frequency domain resource is located The index number of each subband; or bitmap, where each bit in the bitmap corresponds to a subband, and the first value of each bit indicates that the subband corresponding to the bit is each A subband where the PUSCH time-frequency resource is located, and the second value of each bit indicates that the subband corresponding to the bit is not the subband where the PUSCH time-frequency resource is located.
  • the resource configuration information of PUSCH further includes: the number of interlaced units included in the frequency domain resources of each PUSCH time-frequency resource and/or the number of interlaced units included in the frequency domain resources of each PUSCH time-frequency resource The index number; an interleaving unit includes at least one physical resource block PRB.
  • one PRACH time-frequency resource is associated with at least one preamble sequence
  • one preamble sequence in the at least one preamble sequence is associated with one or more PUSCH resource units.
  • the random access configuration information further includes: first indication information of the subband where the time-frequency resource used by the network device to send the random access response message is located.
  • the sending module is further configured to send a response message for the random access message on the subband indicated by the first indication information.
  • the sending module is also used to: send a response message for randomly received messages on a preset subband; where the preset subband is the same as the subband where the PUSCH time-frequency resource used to send the PUSCH is located.
  • the preset subband is the same as the subband where the PUSCH time-frequency resource used to send the PUSCH is located.
  • One subband or multiple subbands in is the same; or, the preset subband is the same as one subband or multiple subbands in the subband where the PRACH time-frequency resource used to transmit the PRACH is located.
  • the response time window of the response message for sending the random access message includes multiple time periods, and different time periods do not overlap in time, and the subband corresponding to each time period is used for receiving random access One subband or multiple subbands in the subband where the time-frequency resource of the response information is located; the sending module is used to: in accordance with the order of multiple time periods in the response time window, in each time period, the corresponding time period LBT is performed on the subband to send a response message for the random access message on the subband where the LBT is successfully performed; among them, if the LBT fails to be performed on the subband corresponding to the first time period, then in the first time period Continue to try to perform LBT on the subband corresponding to a time period, so as to send a response message for the random access message on the subband where the LBT is successfully performed.
  • the resource configuration information of the PRACH also includes indication information for configuring the subband of the frequency domain resource of each PRACH time-frequency resource.
  • the embodiments of the present application provide a computer storage medium for storing computer software instructions used for the above-mentioned terminal devices and/or network devices, which include programs for executing the above-mentioned various aspects.
  • the embodiments of the present application provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the methods described in the foregoing aspects.
  • Figure 1 is a schematic diagram of a 2-step RACH process
  • Figure 2 is a schematic diagram of a 4-step RACH process
  • FIG. 2A is a schematic diagram of a network architecture provided by an embodiment of this application.
  • FIG. 3 is a schematic structural diagram of a network device provided by an embodiment of this application.
  • FIG. 4 is a schematic structural diagram of a terminal device provided by an embodiment of the application.
  • FIG. 5 is a schematic flowchart of a random access method provided by an embodiment of this application.
  • FIG. 6 is a schematic diagram of interleaving mapping during resource mapping under NR-U provided by an embodiment of the application
  • FIG. 7 is a schematic flowchart of a terminal device sending a random access message to a network device according to an embodiment of the application
  • FIG. 8 is a schematic diagram of a PUSCH resource configuration method provided by an embodiment of the application.
  • FIG. 9 is a schematic diagram of a PUSCH resource configuration method provided by an embodiment of the application.
  • FIG. 10 is a schematic diagram of a PRU under NR-U according to an embodiment of this application.
  • FIG. 11 is a schematic diagram of a PUSCH resource and PUSCH resource configuration relationship provided by an embodiment of this application.
  • FIG. 12 is a schematic diagram of a configuration relationship between PUSCH resources and PUSCH resources provided by an embodiment of this application;
  • FIG. 13 is a schematic diagram of a PUSCH resource and PUSCH resource configuration relationship provided by an embodiment of the application.
  • FIG. 14 is a schematic diagram of a subband where a random access response message is provided according to an embodiment of this application.
  • 15 is a schematic diagram of a process in which a network device sends a random access response message according to an embodiment of this application;
  • 16 is a schematic diagram of a process in which a network device sends a random access response message according to an embodiment of the application
  • FIG. 17 is a schematic structural diagram of a terminal device provided by an embodiment of this application.
  • FIG. 18 is a schematic structural diagram of a terminal device provided by an embodiment of this application.
  • FIG. 19 is a schematic structural diagram of a terminal device provided by an embodiment of this application.
  • FIG. 20 is a schematic structural diagram of a network device provided by an embodiment of this application.
  • FIG. 21 is a schematic structural diagram of a network device provided by an embodiment of this application.
  • FIG. 22 is a schematic structural diagram of a network device provided by an embodiment of this application.
  • PRACH Physical Random Access Channel, used to carry the preamble sequence sent to the network device before the terminal device starts data transmission.
  • the terminal device may send the preamble sequence on the PRACH according to the information indicated by the network device, for the network device to identify the random access request and adjust and measure the uplink synchronization.
  • sending PRACH, sending preamble, or sending preamble has the same meaning, that is, the terminal device sends the preamble for random access on the predetermined PRACH resource.
  • PUSCH Physical uplink shared channel, used to carry uplink service data.
  • the terminal device can send a radio resource control (Radio Resource Control, RRC) connection request message on the PUSCH according to the information indicated by the network device to request the network to establish an RRC connection.
  • RRC Radio Resource Control
  • sending PUSCH and sending uplink data have the same meaning, that is, the terminal device sends uplink data for random access on a predetermined PUSCH resource, and the uplink data may include RRC information such as request for connection establishment.
  • the uplink data carried by the PUSCH resource has a corresponding relationship with the preamble sequence carried by the PRACH resource.
  • 4-step random access channel (4-step random access channel, 4-step RACH) process: as shown in Figure 2, it includes 4 steps: 1) The terminal device sends a message 1 (message 1, Msg1), Msg1 to the network device It carries the preamble sequence for random access. Specifically, the terminal device can randomly select a preamble, which can also be called a random access preamble, and send the preamble sequence on the PRACH; 2) The network device sends the preamble to the terminal The device sends a random access response (random access response, RAR) message, which may also be referred to as message 2 (message 2, Msg2). That is, after the base station detects that the preamble is sent, it sends a RAR message in the downlink.
  • RAR random access response
  • the RAR message should at least contain the following information: the number of the preamble received by the base station, timing adjustment information, the uplink resource location indication information allocated to the terminal device, and temporary The allocated cell radio network temporary identifier (TC-RNTI), etc.; 3)
  • the terminal device sends the PUSCH to the network device, which can also be called message 3 (message 3, Msg3), that is, the terminal device is receiving After the RAR message, the uplink message is sent on the allocated uplink resources according to the instructions in the RAR message; 4)
  • the network device sends a contention resolution message (contention resolution message) to the terminal device through the Physical Downlink Shared Channel (PDSCH) , CRM), can also be called message 4 (message 4, Msg4), when the terminal device receives Msg4, and the received CRM contention resolution identity (CRID) matches the identification information transmitted by the terminal device, It can be considered that the random access of the terminal device is successful.
  • the MsgA sent by the terminal device includes the contents of Msg1 and Msg3 in the 4-step RACH, that is, the terminal device sends the preamble and PUSCH in the MsgA.
  • the MsgB sent by the network device to the terminal device includes the content of Msg2 and Msg4 in the 4-step RACH, that is, the network device sends at least one of the response information for the preamble sequence and the uplink data in the MsgB.
  • LBT In the 5G NR-U scenario, in order to improve spectrum utilization and reduce collisions between different networks, devices (including network devices and terminal devices) in the NR-U scenario need to perform LBT before sending data.
  • Devices in the NR-U scenario are divided into frame-based equipment (FBE) and load-based equipment (Loading-based Equipment, LBE).
  • FBE equipment means that the equipment has periodic timing when sending or receiving, and the cycle is a fixed frame period.
  • LBE equipment means that the equipment does not have a fixed time when sending and receiving, but initiates data transmission based on data requirements.
  • LBE devices in order to reduce the collision of data transmission between different devices, according to different data types, LBE devices will perform different levels of LBT listening.
  • the frequency domain unit of data transmission is at least a sub-band.
  • the bandwidth of a sub-band is 20 MHz. Therefore, the terminal device or network device performs LBT before sending data
  • the frequency domain unit of listening is also at least one subband.
  • the smallest unit of the PRACH subband may also be other bandwidth values, such as 10MHz. If multiple transmission resources have the same start position in the time domain and multiple transmission resources belong to the same subband, the terminal device or network device can perform LBT only once. If the LBT is successful, the terminal device or network device can randomly select multiple transmission resources.
  • One transmission resource among the two transmission resources performs data transmission, or one transmission resource among multiple transmission resources is selected to perform data transmission according to a preset rule. If multiple transmission resources have the same starting position in the time domain, and multiple transmission resources belong to multiple subbands, the terminal device or network device can simultaneously perform LBT listening on multiple subbands occupied by multiple transmission resources. If the LBT of at least one subband succeeds, the terminal device or the network device may randomly select at least one transmission resource in the at least one subband or select one of multiple transmission resources according to a preset rule to perform data transmission.
  • PRACH resource configuration in the 4-step RACH process in the NR scenario: PRACH resource configuration includes the configuration of time domain resources and frequency domain resources.
  • the network device may configure, for example, a parameter PRACH configuration index (configuration index).
  • the terminal device can determine the time domain resource of the PRACH time-frequency resource according to the parameter PRACH configuration index and Table 1.
  • Table 1 only shows the configuration information of part of the PRACH time domain resources.
  • the network equipment When the network equipment configures the frequency domain resources of the PRACH time-frequency resources, the network equipment can configure the frequency domain size and the frequency domain starting position of the PRACH time-frequency resources, and how many PRACH time domains are continuous in the frequency domain on each PRACH time domain opportunity Frequency resources. Specifically, the network device may configure, for example, the parameter Msg1-FrequencyStart, which is used to indicate the start position of the PRACH time-frequency resource in the frequency domain.
  • the network side can also configure parameters such as: frequency division multiplexing (Msg1-Frequency-division multiplexing, Msg1-FDM) of message 1, which is used to indicate how many PRACH time-frequency resources are continuous in the frequency domain for each PRACH time domain opportunity Frequency division multiplexing.
  • the network device may also configure, for example, a parameter: the subcarrier spacing (Msg1-Subcarrier Spacing) of message 1, which is used to indicate the subcarrier spacing ( ⁇ f RA ) of the PRACH time-frequency resource.
  • the terminal device can determine the preamble formats (preamble formats) by looking up Table 1 according to the parameter PRACH Configuration Index.
  • the length of the preamble (L RA ) can be determined according to the preamble format, lookup table two or table three. Finally, according to the length of the preamble and the sub-carrier spacing of the PRACH time-frequency resources and the sub-carrier spacing of the PUSCH time-frequency resources, look up Table 4 to determine the frequency domain size of the PRACH time-frequency resources (that is, the PRACH time-frequency resources occupied Number of RB ).
  • 2-step RACH PRACH configuration methods can be two, one is independent configuration, that is, the terminal device can know the 2-step RACH PRACH time domain configuration table in advance, the current 2-step RACH RPACH The time domain configuration table is not clear in the agreement.
  • the 2-step RACH RPACH time domain configuration table can be redefined by the network device, or it can follow the current NR 4-step RACH PRACH configuration table.
  • the network equipment configures the PRACH resource for the terminal, it can separately configure one or more of the time domain resource configuration index, the starting position of the frequency domain resource, the number of PRACH resources for frequency division multiplexing, and the PRACH subcarrier interval, and the time domain resource configuration index It refers to the configuration index in the PRACH time domain configuration table of 2-step RACH known by the terminal device.
  • Another method is to share the configuration, that is, the PRACH time-frequency resource configured in 2-step RACH can be the same as the PRACH time-frequency resource of 4-step RACH, but the preamble sequence of 2-step RACH is the same as that of 4-step RACH.
  • the start symbol in the time slot indicates the time domain length of each PUSCH time-frequency resource by configuring the time domain length, and the number of time-domain PUSCH time-frequency resources is configured to indicate the number of time-domain PUSCH time-frequency resources in each cycle.
  • Configure the start position of the frequency domain to indicate the start position of the PUSCH frequency domain resource configure the frequency domain length to indicate the frequency domain length of each PUSCH time-frequency resource, and configure the number of PUSCH frequency division multiplexing to indicate each time domain PUSCH resource
  • the second is to configure the relative position of the PRACH time-frequency resource.
  • the time domain offset from the PRACH time-frequency resource is configured to indicate the time domain start position of the PUSCH time-frequency resource
  • the time domain length is configured to indicate each PUSCH time.
  • the length of the time domain of the frequency resource, the number of time-domain PUSCH time-frequency resources is configured to indicate the number of time-domain PUSCH time-frequency resources associated with the time-domain start position of each PUSCH time-frequency resource, for example, through configuration and PRACH time-frequency resources
  • the frequency domain offset indicates the time domain start position of the PUSCH time-frequency domain
  • the frequency domain length is configured to indicate the frequency domain length of each PUSCH time-frequency resource
  • the number of PUSCHs in the frequency division multiplexing is configured to indicate each time domain PUSCH The number of PUSCH frequency division multiplexing on the resource.
  • the resource configuration information of the PUSCH also includes demodulation reference signal DMRS configuration information, and the DMRS configuration information includes at least one of a DMRS port and a DMRS sequence available for configuring each PUSCH time-frequency resource.
  • the PUSCH time-frequency resource and a DMRS port or DMRS sequence on the PUSCH time-frequency resource constitute a PUSCH resource unit (PUSCH resource unit, PRU).
  • mapping relationship between the preamble sequence of the two-step random access in the NR system and the PUSCH resource unit PRU There is a mapping relationship between the preamble sequence of the two-step random access in the NR system and the PUSCH resource unit PRU.
  • the mapping relationship between the preamble sequence and the PRU can be one-to-one, or one-to-many, or many-to-one.
  • the specific mapping relationship can be network equipment Through explicit or implicit configuration, it can also be pre-defined by the protocol.
  • the embodiments of this application are mainly applied to a random access process in a 5G NR-U scenario, and specifically may be a scenario where PRACH time-frequency resources and PUSCH time-frequency resources may span multiple subbands in a 2-step RACH process.
  • the network architecture of the embodiment of the present application may include a network device 100 and a terminal device 200.
  • the network device 100 may be a device that can communicate with terminal devices.
  • the network device 100 may be a base station, and the base station may be a relay station or an access point.
  • the base station can be a base transceiver station (BTS) in the global system for mobile communication (GSM) or code division multiple access (CDMA) network, or it can be a broadband code division
  • the NB (NodeB) in multiple access (wideband code division multiple access, WCDMA) may also be the eNB or eNodeB (evolutional NodeB) in LTE.
  • the base station 100 may also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario.
  • the base station 100 may also be a network device in a 5G network or a network device in a future evolved Public Land Mobile Network (PLMN) network; it may also be a wearable device or a vehicle-mounted device.
  • PLMN Public Land Mobile Network
  • the terminal device 200 may be a user equipment (UE), an access terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a UE terminal, a terminal, a wireless communication device, a UE agent Or UE device, etc.
  • the access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminals in 5G networks or terminals in future evolution of PLMN networks, etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the network device 100 may be implemented by the structure shown in FIG. 3.
  • Figure 3 shows a general hardware architecture of a base station.
  • the base station shown in Figure 3 may include an indoor baseband processing unit (building baseband unit, BBU) and a remote radio unit (RRU), the RRU is connected to the antenna feeder system (that is, the antenna), and the BBU and RRU can be removed as needed. Open to use.
  • BBU building baseband unit
  • RRU remote radio unit
  • the base station 100 may also adopt other general hardware architectures, and is not limited to the general hardware architecture shown in FIG. 3.
  • the terminal device 200 may be implemented by the structure shown in FIG. 4.
  • FIG. 4 shows the general hardware architecture of the mobile phone for description.
  • the mobile phone shown in FIG. 4 may include: a radio frequency (RF) circuit 110, a memory 120, other input devices 130, a display screen 140, a sensor 150, an audio circuit 160, an I/O subsystem 170, a processor 180, and Power 190 and other components.
  • RF radio frequency
  • FIG. 4 does not constitute a limitation on the mobile phone, and may include more or less components than shown in the figure, or combine certain components, or split certain components, or Different component arrangements.
  • the display screen 140 belongs to a user interface (UI), and the display screen 140 may include a display panel 141 and a touch panel 142.
  • the mobile phone can include more or fewer components than shown.
  • the mobile phone may also include functional modules or devices such as a camera and a Bluetooth module, which will not be repeated here.
  • the processor 180 is respectively connected with the RF circuit 110, the memory 120, the audio circuit 160, the I/O subsystem 170, and the power supply 190.
  • the I/O subsystem 170 is respectively connected with other input devices 130, the display screen 140, and the sensor 150.
  • the RF circuit 110 can be used for receiving and sending signals during the process of sending and receiving information or talking. In particular, after receiving the downlink information of the base station, it is processed by the processor 180.
  • the memory 120 may be used to store software programs and modules.
  • the processor 180 executes various functional applications and data processing of the mobile phone by running software programs and modules stored in the memory 120.
  • the other input device 130 can be used to receive input digital or character information, and generate key signal input related to the user settings and function control of the mobile phone.
  • the display screen 140 can be used to display information input by the user or information provided to the user and various menus of the mobile phone, and can also accept user input.
  • the sensor 150 may be a light sensor, a motion sensor, or other sensors.
  • the audio circuit 160 can provide an audio interface between the user and the mobile phone.
  • the I/O subsystem 170 is used to control input and output external devices. The external devices may include other device input controllers, sensor controllers, and display controllers.
  • the processor 180 is the control center of the mobile phone 200. It uses various interfaces and lines to connect various parts of the entire mobile phone. By running or executing software programs and/or modules stored in the memory 120, and calling data stored in the memory 120, Perform various functions of the mobile phone 200 and process data, thereby monitoring the mobile phone as a whole.
  • the power source 190 (such as a battery) is used to supply power to the above-mentioned components.
  • the power source may be logically connected to the processor 180 through a power management system, so that functions such as charging, discharging, and power consumption can be managed through the power management system.
  • the RF circuit 110 may be used to receive random access configuration information sent by a network device, and the configuration information includes resource configuration information; it may also be used to send a random access message to the network device.
  • the random access message may be the aforementioned MsgA.
  • the memory 120 may be used to store the foregoing resource configuration information.
  • the methods in the following embodiments can all be implemented in the network device 100 and the terminal device 200 having the above hardware structure.
  • the above-mentioned network equipment and terminal equipment are taken as examples to describe the method of the embodiment of the present application.
  • the embodiments provided in this application mainly focus on the resource configuration of MsgA PRACH and MsgA PUSCH in the 2-step RACH process.
  • the 4-step RACH process the transmission bandwidth of Msg3PUSCH supports multiple subbands.
  • the resource configuration and mapping relationship of MsgA PRACH and MsgA PUSCH in the 2-step RACH process in the NR scenario are still under discussion, and there is no clear conclusion.
  • PUSCH transmission in the NR-U scenario supports the combined use of multiple subbands.
  • the frequency domain configuration of the PUSCH needs to include the subband configuration where it is located. information.
  • the network device sends a response message to the terminal device, it also needs to consider the subband location of the response message. If the terminal device does not know where the response message is The terminal equipment needs to monitor response messages for different subbands at the same time, which will increase the energy consumption of the terminal equipment.
  • this application provides a random access method.
  • the configuration information includes PRACH resource configuration information and PUSCH resource configuration information, and PUSCH resource configuration
  • the information also includes indication information of the subband where the frequency domain resources of the PUSCH are located; and, when the frequency domain resources of the MsgA PRACH and the MsgA PUSCH sent by the terminal device belong to different subbands, the network device sends a response message to the terminal device, responding
  • the subband where the message is located may be the same as the subband where the PUSCH is located or the subband where the PRACH is located, or the subband where the response information is located is notified to the terminal device in advance by the network device.
  • the embodiment of the present application provides a random access method, as shown in FIG. 5, including:
  • the network device sends random access configuration information to a terminal device.
  • the random access configuration information includes PRACH resource configuration information and PUSCH resource configuration information.
  • the PUSCH resource configuration information includes information for configuring each PUSCH time-frequency resource. Indication information of the subband where the frequency domain resource is located.
  • the network device sends the aforementioned random access configuration information to the terminal device.
  • the random access configuration information may be included in the system message periodically broadcast by the network device.
  • the indication information used to configure the subband where each PUSCH time-frequency resource is located may include:
  • the index number of each subband where each PUSCH frequency domain resource is located is located.
  • the index number of the subband can be, for example, 0, 1, 2, 3..., when the index number of the subband where the start position of the frequency domain is located is 1, and the number of subbands is 2, each PUSCH time-frequency resource
  • the sub-band at can be understood as two sub-bands counting from the sub-band with index number 3, including sub-band 1 and sub-band 2; or when the sub-band index number at the end of the frequency domain is 2, the number of sub-bands is At time 2, the subband in which each PUSCH time-frequency resource is located can be understood as two subbands counting from the subband with index number 2, including subband 2 and subband 1.
  • the subband indication information is the index number of each subband where each PUSCH frequency domain resource is located, for example, when the index number is 0 and 1, the subbands allocated for each PUSCH frequency domain resource are subband 0 and subband 1.
  • the indication information used to configure the subband where each PUSCH time-frequency resource is located may include:
  • Bitmap where each bit in the bitmap corresponds to a subband, and the first value of each bit indicates that the subband corresponding to the bit is a subband where each PUSCH time-frequency resource is located ,
  • the second value of each bit indicates that the subband corresponding to the bit is not the subband where the PUSCH time-frequency resource is located.
  • the first value can be 1, and the second value can be 0.
  • the corresponding subband index is the subband 0, subband 1...subband 4.
  • the third subband (subband 2) and the fifth subband (subband 4) are the subbands where PUSCH time-frequency resources are located, and the first subband (subband 0), The second subband (subband 1) and the fourth subband (subband 3) are not subbands where PUSCH time-frequency resources are located.
  • the resource configuration information of PUSCH may also include: the number of interlaces included in the frequency domain resource of each PUSCH time-frequency resource and/or the number of interlaces included in the frequency domain resource of each PUSCH time-frequency resource
  • the index number of the interleaving unit that is, the time-frequency resource corresponding to n interleaving units is 1 PUSCH time-frequency resource, and n is greater than or equal to 1, and one interleaving unit includes at least one physical resource block (PRB).
  • PRB physical resource block
  • the PRB-based interlace mapping (PRB-based interlace mapping) method is supported when the data carried on the PUSCH under the NR-U is mapped on the frequency domain resources. For example, when 20MHz bandwidth is supported under NR-U, the following two interleaving designs can be applied to PUSCH:
  • FIG. 6 is a schematic diagram of interleaving mapping during resource mapping under NR-U.
  • three subbands are shown, subband 0, subband 1, and subband 2.
  • the interleaving units with index numbers 0 and 1 are also shown.
  • the PRB in interleaving unit 1 is in subband 0 and subband 1. Both subband and subband 2 are mapped, and the PRB in interleaving unit 1 is also mapped in subband 0, subband 1, and subband 2.
  • the configuration form of the number of interlace units included in the frequency domain resources of the PUSCH time-frequency resource and the index number of the interlace unit may have the following forms:
  • Configure specific numerical indications for example, X bits are used to represent the number of interlaced units of PUSCH time-frequency resources, and Y bits are used to represent the index number of the interlaced units;
  • Bitmap indication for example, all the interleaving units of PUSCH time-frequency resources are represented by Z bits, the default value can be set to 0, if any interleaving unit is configured to the terminal device, the PUSCH time-frequency resource can be placed in the interleaving unit The value of the corresponding bit is set to 1.
  • the terminal device receives random access configuration information sent by the network device.
  • the terminal device sends a random access message to the network device, where the random access message includes at least one of PRACH and PUSCH, the PRACH time-frequency resource occupied by PRACH is determined according to the resource configuration information of PRACH, and the PUSCH occupied The PUSCH time-frequency resources are determined according to the resource configuration information of the PUSCH.
  • the network device can determine the time-frequency resource of the random access message according to the PRACH resource configuration information and the PUSCH resource configuration information, including the PRACH time-frequency resource and the PUSCH time-frequency resource; the network device is in the PRACH time-frequency resource
  • the PRACH is received on the uplink
  • the PUSCH is received on the PUSCH time-frequency resource.
  • the random access message can be understood as the MsgA in FIG. 1.
  • the PRACH time-frequency resource is the time-frequency resource of the PRACH where the preamble in the MsgA is located
  • the PUSCH time-frequency resource is the time-frequency resource of the PUSCH where the uplink data in the MsgA is located.
  • the terminal device can determine the random access message to be sent according to the indication information of the subband where the frequency domain resource of each PUSCH time-frequency resource is contained in the random access configuration information.
  • the subband location of the PUSCH In this way, if a preamble sequence corresponds to multiple PRUs with the same start position in the time domain, and multiple PRUs are located on multiple different subbands, the terminal device can simultaneously control multiple PRUs located on multiple different subbands before sending PUSCH. Multiple subbands where the PRU is located perform LBT at the same time.
  • the terminal device can randomly select among the PRU resources in at least one subband or select a PRU resource according to certain preset rules to send PUSCH .
  • the terminal LBT efficiency can be improved, and the PUSCH transmission efficiency in MsgA can be improved.
  • the PRACH and PUSCH in the MsgA respectively transmit the preamble and uplink data.
  • the terminal device needs to implement the LBT mechanism.
  • PRACH occasion, RO PRACH transmission opportunity
  • PUSCH occasion, PO PUSCH transmission opportunity
  • the network device determines PRACH time-frequency resources and PUSCH time-frequency resources according to the PRACH resource configuration information and PUSCH resource configuration information.
  • the network device receives PRACH on the PRACH time-frequency resource, and receives the PUSCH on the PUSCH time-frequency resource.
  • the terminal device sending a random access message to the network device may include steps 5031-5034:
  • the terminal device determines the first PRACH time-frequency resource used to send the preamble sequence and the time domain interval of the first PUSCH time-frequency resource (PO resource) associated with the first PRACH time-frequency resource (RO resource).
  • the PUSCH time-frequency resource is one PUSCH resource among the one or more PUSCH time-frequency resources associated with the first PRACH time-frequency resource. Then step 5032 or step 5033 is executed.
  • PRACH time-frequency resources can be understood as the aforementioned RO resources
  • PUSCH time-frequency resources can be understood as the aforementioned PO resources.
  • the first PRACH time-frequency resource may correspond to at least one RO resource
  • the first PUSCH time-frequency resource may correspond to at least one PO resource.
  • One PO resource may be one PO resource among one or more PO resources associated with one RO resource. In other words, one RO resource can be mapped to one or more PO resources.
  • the terminal device before sending the MsgA, the terminal device needs to determine the time domain interval between the RO resource used to send the PRACH and the PO resource associated with the RO resource.
  • the terminal device determines that the time domain interval is less than or equal to the threshold, and the subband where the first PRACH time-frequency resource is located is the same as the subband where the first PUSCH time-frequency resource is located, the terminal device responds to the first PRACH time-frequency resource.
  • the subband corresponding to the frequency resource executes listening first and then speaking LBT.
  • the terminal device sends a PRACH to the network device on the first PRACH resource, and sends a PUSCH to the network device on the first PUSCH time-frequency resource.
  • the threshold value may be, for example, 16 us or other values, which is not limited in the embodiment of the present application.
  • the terminal device can consider that after the PRACH is sent on the RO resource, due to the time domain The interval is short, and the subband of the RO resource for sending PRACH has not been occupied temporarily. Therefore, the subband of the PO resource configured by the network device to the terminal device and the subband of the RO resource should be the same.
  • the terminal device Before sending MsgA LBT can be performed only once. If LBT is successful, the terminal device can send PRACH to the network device on the RO resource, and send the PUSCH to the network device on the PO resource.
  • the terminal device determines that the time domain interval is greater than the threshold value, the terminal device performs LBT on the subband where the first PRACH time-frequency resource is located, and when the LBT is successfully performed, sends the PRACH on the first PRACH time-frequency resource.
  • the terminal device performs LBT on the subband where one or more PUSCH time-frequency resources are located, and arbitrarily selects one or more PUSCH time-frequency resources included in the subband where the LBT is successfully executed or according to a preset rule Select a PRU resource to send PUSCH.
  • the terminal device needs to separately check the RO resource ( The subband where the PRACH resource is located and the subband where the PO resource (PUSCH resource) is located are LBT. Therefore, the subband where the PO resource configured by the network device is located and the subband where the RO resource is located may be the same or different, and the PO resource may also span multiple subbands.
  • the terminal device determines that the time domain interval is greater than 16 us, the terminal device performs LBT on the subband where the RO resource is located, and when the LBT is successfully performed, sends the first preamble sequence on the first RO resource. Then, the terminal device performs LBT on the subband where one or more PO resources corresponding to the first RO resource is located, and selects the PRU resource corresponding to the first preamble sequence on the PO resource on the subband that is successfully executed to send PUSCH.
  • the terminal device when the PRACH time-frequency resource and the PUSCH time-frequency resource are located in the same subband, and the time domain interval between the RO resource and the PO resource in the random access configuration information is less than
  • the terminal device only needs to perform LBT snooping once when it initiates the transmission of MsgA in 2-step RACH. If the LBT is successful, the terminal can send PUSCH directly after sending PRACH without LBT snooping on PUSCH resources , Which reduces the number of LBT snooping times for the time-frequency resources needed to be used by MsgA in the 2-step RACH.
  • the resource configuration information of PUSCH in step 501 may be directly and periodically configured by the network device.
  • the resource configuration information of PUSCH includes the following parameters:
  • the configuration of PUSCH frequency domain resources includes an indication of the start position of the frequency domain, an indication of the frequency domain size of each PUSCH time-frequency resource, and an indication of the size of each PUSCH time-frequency resource.
  • the frequency domain size of each PUSCH time-frequency resource may be the number of interlaces and the index number of the interlace of each PUSCH time-frequency resource.
  • the resource configuration information of the PUSCH in step 501 may be implemented by configuring a relative position relative to the resource configuration information of PRACH.
  • the resource configuration information of PUSCH includes the following parameters: the time-domain resource configuration of PUSCH includes a time-domain offset indicator, which is used to indicate the time-domain offset of each PUSCH time-frequency resource relative to each PRACH time-frequency resource Determine the time domain starting position of the PUSCH time-frequency resource; the time domain length of each PUSCH time-frequency resource; the number of PUSCH time-frequency resources in the time domain; the PUSCH frequency domain resource configuration includes the indication of the frequency domain starting position, An indication of the frequency domain size of each PUSCH time-frequency resource, an indication of the subband information where each PUSCH time-frequency resource is located, and an indication of the number of frequency division multiplexed PUSCH time-frequency resources contained in the PUSCH frequency domain resource.
  • the frequency domain size of each PUSCH time-frequency resource may be the number of interlace
  • the network device may also configure a demodulation reference signal (DMRS) of the PUSCH time-frequency resource to indicate at least one of the DMRS port and DMRS sequence available on each PUSCH time-frequency resource .
  • DMRS demodulation reference signal
  • the above-mentioned PUSCH resource configuration information may also include DMRS configuration information, and the DMRS configuration information includes at least one of a DMRS port and a DMRS sequence available for configuring each PUSCH time-frequency resource.
  • a PUSCH time-frequency resource may be divided into multiple PUSCH resource units (PUSCH resource units, PRU) through at least one of a DMRS port and a DMRS sequence, and each PRU corresponds to at least one of a DMRS port and a DMRS sequence.
  • the PUSCH resource unit is a combination of a PUSCH time-frequency resource and a DMRS port, or a combination of a PUSCH time-frequency resource and a DMRS sequence, or a combination of a PUSCH time-frequency resource and a DMRS sequence or a DMRS port.
  • the time-frequency resource corresponding to n interleaving units is the time-frequency resource of 1 PUSCH
  • the time-frequency resource of this PUSCH can be divided into multiple PRUs through DMRS ports and/or DMRS sequences.
  • PRU0, PRU1, and PRU2 in one PUSCH time-frequency resource, and the DMRS port number and/or DMRS sequence in each PRU are different.
  • the terminal device can perform LBT on multiple subbands at the same time. If the LBT is executed successfully, the terminal device can randomly select among multiple PRU resources belonging to different subbands or select one PRU resource to send the PUSCH according to certain preset rules. In this way, when a preamble is configured with PRU resources of multiple subbands, the LBT success rate of the terminal device can be improved, thereby improving the transmission efficiency of PUSCH in MsgA.
  • the resource configuration information of the PRACH in step 501 may also include indication information of the subband where the frequency domain resource for configuring each PRACH time-frequency resource is located.
  • the indication information used to configure the subband of the frequency domain resource of each PRACH time-frequency resource includes:
  • Bitmap where each bit in the bitmap corresponds to a subband, and the first value of each bit indicates that the subband corresponding to the bit is a subband where each PRACH time-frequency resource is located , The second value of each bit indicates that the subband corresponding to the bit is not the subband where the PRACH time-frequency resource is located.
  • the resource configuration information of the PRACH in step 501 may also include: PRACH time-domain resource configuration index, PRACH An indication of the starting position of the frequency domain resource, an indication of the number of consecutive PRACH time-frequency resource reuses on each PRACH frequency domain resource, an indication of the size of each PRACH time-frequency resource, and the subcarrier interval where the PRACH time-frequency resource is located.
  • the network equipment may or may not configure the PRACH time-frequency resource separately for 2-step RACH, and the terminal equipment will use the 4-step RACH PRACH time-frequency resource configured by the network equipment.
  • the network equipment only needs to configure each PRACH time-frequency resource.
  • the preamble used for the 2-step RACH in the frequency resource is used to indicate which preamble sequences in the PRACH time-frequency resource of each 4-step RACH are used for the 2-step RACH.
  • the resource configuration information of PRACH may include: a preamble for random access.
  • one PRACH time-frequency resource can be associated with at least one preamble, and one preamble in at least one preamble can be associated with one or more PUSCH resources.
  • one RO resource can be associated with at least one preamble, and one preamble in at least one preamble can be associated with one or more PO resources.
  • the network device can configure the PRACH time-frequency resource
  • the frequency domain resources and the frequency domain resources in the PUSCH time-frequency resource are in the same subband.
  • the PRACH time-frequency resource configured by the network device contains only one subband, and the time-domain interval between the PRACH time-frequency resource used to send the preamble and the PUSCH time-frequency resource associated with the PRACH time-frequency resource is less than the threshold, then The network device can configure the position of the frequency domain resource of the PUSCH time-frequency resource and the position of the frequency domain resource of the PRACH time-frequency resource to be in the same subband.
  • the PRACH time-frequency resource is recorded as the RO resource
  • the PUSCH time-frequency resource is recorded as the PO resource. As shown in FIG. 11, the frequency domain resources of the RO resource and the frequency domain resources of the PO resource are both located in subband 1.
  • one RO resource may include a set of preamble sequences (preamble), the preamble sequence set includes at least one preamble sequence, and one PO resource may include a set of PRUs, and the PRU set includes at least one PRU.
  • the mapping relationship between the preamble sequence and the PRU may be: one preamble sequence corresponds to one PRU, or one preamble sequence corresponds to multiple PRUs, or multiple preamble sequences correspond to one PRU.
  • the mapping relationship between the preamble sequence and the PRU may be explicitly or implicitly configured by the network device, or may be predefined by the protocol, which is not limited in this application.
  • the network device can use the subband where each RO resource is located.
  • the PUSCH resource is configured above, that is, the time domain interval between each RO resource in the PRACH resource and the PO resource in the corresponding PUSCH resource is less than 16us, and each RO resource of the PRACH resource and its corresponding PO resource are in the same subband .
  • the subband position of RO1 resource is subband 1
  • the subband position of RO 0 is subband 0
  • the subband position of is also subband 1
  • the subband position of PO 0 corresponding to RO 0 is also subband 0.
  • the terminal device needs to perform LBT before sending PRACH and PUSCH, if two The corresponding LBTs are executed successfully, and the terminal device sends PRACH and PUSCH respectively.
  • the network device can increase the efficiency of the LBT by configuring multiple RO resources and multiple PO resources on the frequency domain resources.
  • each RO resource of PRACH is in one subband as an example for description.
  • the network device configures the frequency domain resource in the PRACH resource and the frequency domain resource in the PUSCH resource can be divided into two situations:
  • the PRACH resource configured by the network device includes one RO resource, and one RO resource corresponds to multiple PO resources in the PUSCH resource, and the multiple PO resources are located in different subbands, that is, each subband where the PUSCH is located contains at least one PO resource.
  • (a) in Figure 13 illustrates that the PRACH resource includes an RO 0 resource, the RO 0 resource is located on subband 0, the PUSCH resource includes the PO 0 resource and the PO 1 resource, and the PO 0 resource is located on the subband 0. On band 0, the PO 1 resource is on subband 1.
  • the mapping relationship between the preamble included in the RO resource and the PRU included in the PO resource can be one-to-one, one-to-many, and many-to-one.
  • the mapping relationship between the preamble and the PRU can be explicitly or implicitly configured by the network device, or it can be a protocol. Pre-defined, this application is not limited.
  • the PRACH resource configured by the network device includes multiple RO resources, and the multiple RO resources may be located on different subbands, that is, each subband where the PRACH resource is located includes at least one RO resource.
  • One RO resource can correspond to multiple PO resources in the PUSCH resource, and the multiple PO resources are located on different subbands, that is, each subband where the PUSCH resource is located includes at least one PO resource.
  • PRACH resources include RO 0 resources and RO 1 resources, RO 0 resources are located on subband 0, RO 1 resources are located on subband 1, and PUSCH time-frequency resources Including PO 0 resources and PO 1 resources, PO 0 resources are located on subband 0, and PO 1 resources are located on subband 1.
  • RO 0 resources correspond to PO 0 resources and PO 1 resources
  • RO 1 resources correspond to PO 0 resources and PO 1 resources
  • (C) in Figure 13 shows that PUSCH resources include PO 0 resources, PO 1 resources, and PO 2 resources.
  • PO 0 resources are located in subband
  • PO 1 resources are located in subband 1
  • PO 2 resources are located in subband 2.
  • RO 0 resources correspond to PO 0 resources and PO 1 resources
  • RO 1 resources correspond to PO 1 resources and PO 2 resources.
  • At least one PRACH time-frequency resource determined by the terminal device according to the PRACH resource configuration information and at least one PUSCH time-frequency resource determined according to the PUSCH resource configuration information have the following relationship:
  • One PRACH time-frequency resource in at least one PRACH time-frequency resource is associated with multiple PUSCH time-frequency resources in at least one PUSCH time-frequency resource, such as (a) in FIG. 13, (b) in FIG. 13, and in FIG. In (c), RO 0 resource is associated with PO 0 resource and PO 1 resource; or
  • Each PRACH time-frequency resource in at least one PRACH time-frequency resource is associated with one PUSCH time-frequency resource in at least one PUSCH time-frequency resource, such as (b) in Figure 13, RO 0 resource corresponds to PO 0 resource, RO 0 resource It also corresponds to the PO 1 resource, the RO 1 resource corresponds to the PO 0 resource, and the RO 1 resource corresponds to the PO 1 resource; or
  • Multiple PRACH time-frequency resources in at least one PRACH time-frequency resource are associated with one PUSCH time-frequency resource in at least one PUSCH time-frequency resource.
  • the RO 0 resource corresponds to the PO 0 resource
  • the RO 1 resource also corresponds to the PO 0 resource.
  • the network device when the frequency domain resource of PUSCH contains multiple subbands, when the terminal device sends MsgA, when the frequency domain resources where PRACH and PUSCH are located are in different subbands, the network device also needs to consider sending response information in multiple subbands. On the issue of selecting a subband for transmission.
  • the random access configuration information may further include: the first indication information of the subband where the time-frequency resource for receiving the random access response message is located.
  • the method may further include step 506 and step 507:
  • the network device sends a response message for the random access message to the terminal device.
  • the information in the response message for the random access message may be one of the following three situations:
  • the network device When the network device receives only PRACH, or receives P RACH and PUSCH, but the network device only detects PRACH correctly, the network device sends response information only for PRACH, which is used to instruct the terminal device to perform uplink data
  • the response information may be called 2-step RACH RAR, or fallback RAR (fallback RAR);
  • the network device When the network device only receives the PUSCH, the network device sends response information only for PUSCH.
  • the response information is used to instruct the terminal device to perform uplink data transmission/retransmission (when PUSCH decoding fails), or to indicate the random The access flow contention resolution is successful (when PUSCH decoding is successful).
  • the response message can also carry other information, such as timing advance command (TA command), cell radio network identification (C-RNTI or TC-RNTI) uplink scheduling UL grant and RRC commands, etc.; if the response message instructs the terminal device to perform uplink data transmission/retransmission, the response message can carry response information containing PO resource indication information, and the response information contains at least one of the following information One: PO resource indication information, uplink scheduling authorization (UL grant), timing advance command (TA command), temporary cell radio network identification (TC-RNTI), etc.
  • TA command timing advance command
  • C-RNTI cell radio network identification
  • TC-RNTI temporary cell radio network identification
  • the PO resource indication information may be one of the DMRS port number corresponding to the PUSCH, or the DMRS sequence index number corresponding to the PUSCH, or the index number of the PO resource, or the PUSCH resource unit index number corresponding to the PUSCH (PUSCH resource unit index number). unit index, PRU index).
  • the network device When the network device receives the PRACH and PUSCH and demodulates the PRACH correctly, and decodes the PUSCH successfully, the network device sends response information for PRACH and PUSCH, which indicates that the random access process has successfully resolved the contention. .
  • the response message indicates that when the contention resolution of the random access procedure is successful, the response message may also carry other information, such as TA command, C-RNTI or TC-RNTI, UL grant, and RRC commands.
  • the response information for the random access message sent by the network device to the terminal device can be carried on the PDSCH.
  • the PDSCH may be a multiplexing combination of multiple terminal device response information, that is, the response information sent by the network device is a groupcast. Form; PDSCH may also be the response information of a single terminal device, that is, the response information sent by the network device is in a unicast form.
  • the frequency domain resources for the network equipment to send response information should be considered based on these two situations:
  • the frequency domain resource location of the response information can be the same as the frequency domain location of the PUSCH resource unit (PRU) used by the terminal device to send PUSCH, that is, the preset
  • the subband of may be the same as the subband where the PRU used by the terminal device to send the PUSCH is located.
  • Figure 14 illustrates that if the terminal device chooses to send preamble 0 on the RO 0 resource of subband 0, and the PUSCH occupies PRU 0 in the PO 0 of subband 0, then the terminal device can determine that it is on subband 0 Send a response message for the random access message.
  • the network device may send the response message to the terminal device on a preset subband.
  • the preset subband may be one of the following frequency domain resource positions:
  • the subband of the network device configuration is the subband of the network device configuration.
  • the frequency domain resource location where the network device sends the response message is known to the terminal device, that is, the frequency domain resource location where the response information is located can be configured by the network device to the terminal device, or the frequency domain where the response information is located.
  • the resource location is preset, and the terminal device and the network device know the preset frequency domain resource location.
  • the network device when the network device sends the response information, the PDSCH carrying the response information is scheduled by the DCI carried in the PDCCH, and the frequency domain resource location where the PDCCH is located is the same as the frequency domain resource location where the PDSCH is located. 507.
  • the terminal device monitors the response message for the random access message on the subband indicated by the first indication information.
  • the terminal device monitors the MsgB on the subband indicated by the first indication information.
  • the subband indicated by the indication information of the subband where the time-frequency resource for receiving the random access response message is located may be a preset subband, that is, the terminal device may monitor on the preset subband Response message for random access message.
  • the preset subband is the same as one or more subbands in the subband where the PUSCH time-frequency resource used to transmit the PUSCH is located;
  • the preset subband is the same as one or more subbands in the subband where the PRACH time-frequency resource used to send the preamble sequence is located.
  • the terminal device after the terminal device sends MsgA, it will open the response time window of MsgB (RAR window, or MsgB window). In order to improve the efficiency of random access, within the response time window
  • the network device listens to the LBT of the time-frequency resource that carries the response information. If the LBT is successful, the network device sends the response information on the time-frequency resource that carries the response information corresponding to the LBT. If the LBT is unsuccessful and the response time window does not expire, the network device can try to continue LBT on the time-frequency resource that carries the response information. As shown in Figure 15.
  • the network device can terminate the sending of MsgB:
  • the response time window opened by the terminal device has timed out
  • the network device does not need to send response information to the terminal device.
  • the terminal device needs Knowing the location of the subband where the response message is located prevents the terminal device from needing to listen to multiple subbands at the same time when receiving the response message, which reduces the complexity of detecting the response message by the terminal device and the power consumption of the terminal device.
  • the network device in the two-step random access process, when a network device sends a response message, if multiple subbands are available for selection, the network device can separate multiple subbands within the random response time window. In each time period, a subband is selected to try to send random response information.
  • the response time window for the terminal device to receive the response message of the random access message includes multiple time periods, and different time periods do not overlap in time, and the subband corresponding to each time period can be used for One subband or multiple subbands in the subband where the time-frequency resource for receiving the random access response information is located.
  • the terminal device determines the available sub-band range for response message transmission.
  • the sub-band range may be configured by the network device to the terminal device, or a preset sub-band.
  • the terminal device knows the predefined sub-band.
  • the position of the subband, for example, the subband where the time-frequency resource used to receive the random access response information is located may be multiple subbands where the PRACH time-frequency resource used to transmit PRACH is located, or the PUSCH time-frequency resource used to transmit PUSCH is located Of multiple subbands.
  • the terminal device determines the transmission scheme of the response message.
  • the terminal device determining the transmission scheme of the response message may include, or in other words, the terminal device monitoring the response message for the random access message on the preset subband may include: the terminal device according to multiple response time windows. In the sequence of time periods, in each time period, the response message for the random access message is monitored on the subband corresponding to the time period. Wherein, if the terminal device does not monitor the response message for the random access message on the subband corresponding to the first time period, the terminal device continues to try to monitor the random access message on the subband corresponding to the next time period in the first time period. The response message of the access message.
  • the length of the response time window is X
  • the starting time is t 0
  • the number of subbands available for response message transmission is N
  • the length of each subband is 0 ⁇ i ⁇ N-1
  • L i represents the length of the period of the i th sub-band
  • the network device when the LBT of the subband corresponding to the i-th time period in the response time window is successful, the network device sends a response message on the i-th subband.
  • the LBT of the band is unsuccessful. Because the network device has multiple transmission opportunities to respond to the message, the network device can continue to the i-th corresponding to the i+1th time period when the LBT of the sub-band corresponding to the i-th time period is unsuccessful Continue to try to perform LBT on the +1 subband; if the network device successfully performs LBT on the i+1th subband corresponding to the i+1th time period, the network device sends a response message on the i+1 subband.
  • the terminal device listens to the response message on the i-th subband during the i-th time period, if the terminal device fails to listen successfully in the i-th time period When the response message is reached, the terminal continues to try to listen to the response message on the i+1th subband corresponding to the i+1th time period.
  • the time period and subband configuration available for response message transmission may be as shown in FIG. 16.
  • the terminal device has sent MsgA
  • the start time of the response time window of MsgB is t 0
  • the terminal device starts to listen to the response message in the subband 0 corresponding to the time period L 0 between t 0 and t 1, if the terminal device The response message is not heard on subband 0, and the terminal device continues to listen for the response message on subband 1 corresponding to the time period L 1 between t 1 and t 2.
  • the subband number corresponding to each time period may be the absolute index number of the subband, or it may be an indicator number for available subband resources.
  • the response time window can be divided to correspond to multiple subbands, and the network device can try to send the response message on the corresponding subband within the corresponding time period.
  • the terminal device also listens to the response information on the corresponding subband in the corresponding time period, which can prevent a certain subband from being occupied for a long time and cause the response message to fail to send, and it also prevents the terminal device from being in multiple subbands at the same time. Bring listening response messages to reduce the complexity of the terminal device's detection of response messages and the power consumption of the terminal.
  • each network element such as a terminal device, a network device, etc.
  • each network element includes a hardware structure and/or software module corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiments of the present application can divide the terminal equipment, network equipment, etc. into functional modules according to the above method examples.
  • each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 17 shows a possible schematic structural diagram of the terminal device involved in the above embodiment.
  • the terminal device 170 includes: a receiving unit 1701, a sending unit 1702, and a processing unit 1703.
  • the receiving unit 1701 is used to support the terminal device to perform the processes 502 and 505 in FIG. 5
  • the sending unit 1702 is used to support the terminal device to perform the process 503 in FIG. 5
  • the processes 5032, 5033 and 5034 in FIG. 7 and the processing unit 1703 is used to
  • the terminal device is supported to execute the process 5031 in FIG. 7.
  • all relevant content of each step involved in the above method embodiment can be cited in the function description of the corresponding function module, and will not be repeated here.
  • FIG. 18 shows a possible schematic structural diagram of the terminal device involved in the foregoing embodiment.
  • the terminal device 180 includes: a processing module 1802 and a communication module 1803.
  • the processing module 1802 is used to control and manage the actions of the first unit.
  • the processing module 1802 is used to support the terminal device to execute the process 5031 in FIG. 7 and/or other processes used in the technology described herein.
  • the communication module 1803 is used to support the communication between the terminal device and other network entities, for example, the communication with the functional modules shown by the network device or the network entities.
  • the communication module may include a sending module and a receiving module.
  • the sending module has a similar function to the sending unit 1702, and the receiving module has a similar function to the receiving unit 1701.
  • the terminal device may also include a storage module 1801 for storing program codes and data of the terminal device.
  • the processing module 1802 may be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), and an application-specific integrated circuit (Application-Specific Integrated Circuit). Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application.
  • the processor may also be a combination that implements computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.
  • the communication module 1803 may be a transceiver, a transceiver circuit, or a communication interface.
  • the storage module 1801 may be a memory.
  • the terminal device involved in the embodiment of the present application may be the terminal device shown in FIG. 19.
  • the terminal device 1910 includes a processor 1912, a transceiver 1913, a memory 1911, and a bus 1914.
  • the transceiver 1913, the processor 1912, and the memory 1911 are connected to each other through a bus 1914;
  • the bus 1914 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus Wait.
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • 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. 19, but it does not mean that there is only one bus or one type of bus.
  • FIG. 20 shows a possible structural diagram of the network device involved in the foregoing embodiment.
  • the network device 2000 includes: a sending unit 2001, a receiving unit 2002, and a processing unit 2003.
  • the sending unit 2001 is used to support the network device to perform the processes 501 and 506 in FIG. 5
  • the receiving unit 2002 is used to support the network device to perform the process 505 in FIG. 5
  • the processing unit 2003 is used to support the network device to perform the process 504 in FIG. 5.
  • all relevant content of each step involved in the above method embodiment can be cited in the function description of the corresponding function module, and will not be repeated here.
  • FIG. 21 shows a possible schematic structural diagram of the network device involved in the foregoing embodiment.
  • the network device 2100 includes: a processing module 2102 and a communication module 2103.
  • the processing module 2102 is used to control and manage the actions of the network device.
  • the processing module 2102 is used to support the network device to perform the process 504 in FIG. 5 and/or other processes used in the technology described herein.
  • the communication module 2103 is used to support communication between the network device and other network entities, such as the communication between the functional modules of the terminal device or the network entities.
  • the communication module 2103 includes a receiving module and a sending module.
  • the receiving module has a similar function to the receiving unit 2002, and the sending module has a similar function to the sending unit 2001.
  • the network device may also include a storage module 2101 for storing program codes and data of the network device.
  • the processing module 2102 may be a processor or a controller, for example, a CPU, a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application.
  • the processor may also be a combination that implements computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.
  • the communication module 2103 may be a transceiver, a transceiver circuit, or a communication interface.
  • the storage module 2101 may be a memory.
  • the network device involved in the embodiment of the present application may be the network device shown in FIG. 22.
  • the network device 2210 includes a processor 2212, a transceiver 2213, a memory 2211, and a bus 2214.
  • the transceiver 2213, the processor 2212, and the memory 2211 are connected to each other through a bus 2214;
  • the bus 2214 may be a PCI bus or an EISA bus.
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used in FIG. 22, but it does not mean that there is only one bus or one type of bus.
  • the embodiment of the present application also provides a computer storage medium for storing computer software instructions used for the above-mentioned terminal device and/or network device, which includes a program designed to execute the steps of the above-mentioned embodiment.
  • the embodiments of the present application also provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the method described in the foregoing embodiment.
  • the steps of the method or algorithm described in conjunction with the disclosure of this application can be implemented in a hardware manner, or implemented in a manner in which a processor executes software instructions.
  • Software instructions can be composed of corresponding software modules, which can be stored in random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read Only Memory, ROM), and erasable programmable read-only memory ( Erasable Programmable ROM (EPROM), Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM), register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and can write information to the storage medium.
  • the storage medium may also be an integral part of the processor.
  • the processor and the storage medium may be located in the ASIC.
  • the ASIC may be located in the core network interface device.
  • the processor and the storage medium may also exist as discrete components in the core network interface device.
  • Computer readable media include computer storage media and communication media, where communication media includes any media that facilitates the transfer of computer programs from one place to another.
  • the storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

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Abstract

La présente invention concerne un procédé d'accès aléatoire, un dispositif terminal et un dispositif de réseau, ces derniers se rapportant au domaine technique des communications. Le dispositif terminal peut clairement connaître la position d'une sous-bande pour un PUSCH, ce qui améliore l'efficacité d'envoi de message d'accès aléatoire du dispositif terminal. Le procédé consiste : à recevoir, par un dispositif terminal, des informations de configuration d'accès aléatoire envoyées par un dispositif de réseau, les informations de configuration d'accès aléatoire comprenant des informations de configuration de ressources d'un canal physique d'accès aléatoire (PRACH) et des informations de configuration de ressources d'un canal physique partagé de liaison montante (PUSCH), les informations de configuration de ressources du PUSCH comprenant des informations d'indication d'une sous-bande où se trouve une ressource de domaine fréquentiel, permettant de configurer chaque ressource temps-fréquence de PUSCH ; et à envoyer, par le dispositif terminal, un message d'accès aléatoire au dispositif de réseau, le message d'accès aléatoire comprenant le PRACH et/ou le PUSCH. Une ressource temps-fréquence de PRACH, occupée par le PRACH, est déterminée selon les informations de configuration de ressource du PRACH et la ressource temps-fréquence de PUSCH, occupée par le PUSCH, est déterminée selon les informations de configuration de ressource du PUSCH. Le mode de réalisation de la présente invention est utilisé pour une procédure d'accès aléatoire dans un scénario de NR-U de 5G.
PCT/CN2020/109379 2019-08-16 2020-08-14 Procédé d'accès aléatoire, dispositif terminal et dispositif de réseau WO2021032027A1 (fr)

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