WO2020143776A1 - 随机接入资源配置方法和装置 - Google Patents

随机接入资源配置方法和装置 Download PDF

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Publication number
WO2020143776A1
WO2020143776A1 PCT/CN2020/071448 CN2020071448W WO2020143776A1 WO 2020143776 A1 WO2020143776 A1 WO 2020143776A1 CN 2020071448 W CN2020071448 W CN 2020071448W WO 2020143776 A1 WO2020143776 A1 WO 2020143776A1
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Prior art keywords
prach resource
network device
prach
offset
symbol
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PCT/CN2020/071448
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English (en)
French (fr)
Inventor
袁世通
刘凤威
邱晶
陈磊
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP20738686.3A priority Critical patent/EP3905818A4/en
Priority to BR112021013602-9A priority patent/BR112021013602A2/pt
Publication of WO2020143776A1 publication Critical patent/WO2020143776A1/zh
Priority to US17/371,895 priority patent/US12069740B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/27—Control channels or signalling for resource management between access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames

Definitions

  • Embodiments of the present application relate to the field of communications, and more specifically, to a method and apparatus for configuring random access resources.
  • an access link is a link where network devices provide access services for terminals
  • a backhaul link is a link between network devices to transfer information and data to each other road.
  • the sum of physical random access channel (physical random access channel, PRACH) resources is fixed for the access link and the return link.
  • PRACH physical random access channel
  • Embodiments of the present application provide a method and an apparatus for configuring random access resources, which solves the configuration problem when random access resources of a network device conflict on an access link and a return link.
  • a random access resource configuration method includes: a first network device receives configuration information of a first physical random access channel PRACH resource; the first network device receives location adjustment information, the location The adjustment information is used to instruct to adjust the position of at least a part of the PRACH resources in the first PRACH resource; the first network device determines the second PRACH resource according to the configuration information of the first PRACH resource and the position adjustment information; The first network device sends a random access request to the second network device on the second PRACH resource.
  • the first network device can adjust the configured first PRACH resource on, for example, a time slot or a symbol, and use the adjusted second PRACH resource for random access.
  • the random access resources on the two links can be staggered in time, thereby solving the randomness of the network device on the access link and the backhaul link Configuration issues when access resources conflict.
  • the first network device after receiving the configuration information of the first PRACH resource, the first network device does not directly use the first PRACH resource to send a random access request, but rather places the first PRACH resource in a time slot according to the received location adjustment information. Adjust on the or symbol to obtain the second PRACH resource, and then use the second PRACH resource to send a random access request on the backhaul link. Adjusting the first PRACH resource in the time domain position can change the time that the network device uses the random access resource on the backhaul link, and can also use the random access resource on the other link with the network device. The time is staggered, which solves the problem of the configuration of the network device when the random access resources on the access link and the backhaul link collide.
  • the second PRACH resource is used by the first network device to send a random access request to the second network device.
  • the first PRACH resource overlaps with the third PRACH resource configured by the first network device for the terminal or the child node of the first network device in the time domain, and the second PRACH resource obtained after the first PRACH resource is adjusted according to the position adjustment information and The third PRACH resources do not overlap in the time domain.
  • overlapping in the time domain includes that the first PRACH resource and the third PRACH resource are the same in certain time slots or in certain symbols on certain time slots, or in certain time slots Some symbols are at the same time.
  • the position adjustment information is used to indicate that the position of at least a part of the PRACH resources in the first PRACH resource is adjusted on a time slot or a symbol.
  • the position adjustment information includes an offset of a time slot or a symbol
  • the first network device adjusts according to the configuration information of the first PRACH resource and the position adjustment
  • the information determines the second PRACH resource, including:
  • the first network device offsets at least a part of the PRACH resources in the first PRACH resource according to the offset of the time slot or symbol to obtain the second PRACH resource.
  • the first PRACH resource can be offset on the slot or symbol to obtain a second PRACH resource, thereby enabling the first network device to use random access on the backhaul link
  • the time slot or symbol of the resource is staggered from the time slot or symbol of the first network device using random access resources on other links, to avoid PRACH resource conflicts on the time slot or symbol, and also to meet the half-double of the first network device Engineering constraints.
  • the method can also be applied to the case where PRACH resources are configured in each system frame, and the PRACH resources are shifted in time slots or symbols within the system frame, which can improve resource utilization.
  • the time slot numbers are not the same, but the time domain resources corresponding to the different time slots of the access link and the backhaul link The location may be the same, and there will be conflicts.
  • the symbols in the first PRACH resource that conflict with the third PRACH resource in the time domain can be offset to avoid collision.
  • the offset of the time slot or symbol is a positive number or a negative number.
  • a positive number indicates a backward offset, and a negative number indicates a forward offset; or a positive number indicates a forward offset, and a negative number indicates a backward offset.
  • the second PRACH resource is obtained after all resources in the first PRACH resource are offset according to the offset of the time slot or symbol.
  • the position adjustment information may indicate that all resources that will be configured with the first PRACH resource
  • the offset on the time slot or symbol can solve the configuration problem of the first network device when the backhaul conflicts with the random access resource on the access link.
  • the location adjustment information further includes location information of a target time slot or symbol
  • the first network device uses at least a part of the first PRACH resources according to The offset of the time slot or symbol is offset to obtain the second PRACH resource, including:
  • the target time slot or symbol is a time slot or symbol where the first PRACH resource and the third PRACH resource conflict, or all time slots or symbol.
  • collision time slot or “collision symbol” in the embodiments of the present application means that the first PRACH resource and the third PRACH resource are both configured on the conflict time slot or the conflict symbol.
  • the target time slot or symbol is determined by an upper node or a host base station of the first network device.
  • the first network device offsets at least a part of the PRACH resources in the first PRACH resource according to the offset of the time slot or symbol to obtain
  • the second PRACH resource includes:
  • the first network device determines a target time slot or symbol in which the first PRACH resource and the third PRACH resource collide in the time domain, and the third PRACH resource is used by the first network device to receive a random access request; Offset the PRACH resource in the target time slot or symbol to obtain the second PRACH resource, where the second PRACH resource includes the resource after the first PRACH resource is offset and the first PRACH resource without offset .
  • the position adjustment information may indicate that the PRACH resource on the target time slot or symbol is offset, which is equivalent to offsetting only a part of the PRACH resource on the time slot or symbol. When only the PRACH resource in the conflicting time slot or conflicting symbol is offset, Then, it may not affect other non-conflicting time slots or symbols, and improve resource utilization.
  • the position adjustment information includes an offset of the starting symbol index of the PRACH timing
  • the first network device changes the PRACH according to the offset of the starting symbol index of the PRACH timing The timing is shifted as a whole to obtain the second PRACH resource.
  • the PRACH resource on the symbol moved out of the current time slot is no longer valid.
  • the PRACH resources still on the symbols of the current time slot are still valid.
  • the position adjustment information includes the offset of the starting symbol index of the PRACH timing
  • it can instruct to shift the entire PRACH timing according to the offset, and the overall offset efficiency is higher.
  • the PRACH timing moved out of the current time slot is regarded as invalid, and the first network device cannot use the PRACH timing on the symbol of the PRACH timing, which can avoid affecting the resource configuration in other time slots.
  • valid in the embodiment of the present application means that the first network device can use the PRACH resource on the effective time slot or symbol indicated by the position adjustment information; “invalid” means that the first network device cannot use the position adjustment information
  • the PRACH resource on the indicated invalid time slot or symbol is no longer mapped to RO in the corresponding position, or the PRACH resource on the other time slot or symbol other than the valid time slot or symbol indicated by the first network device is not used.
  • the position adjustment information includes a time slot and/or symbol index, and the time slot and/or symbol index is used to indicate at least a part of the first PRACH resource
  • the PRACH resource is valid.
  • the first network device determining the second PRACH resource according to the configuration information of the first PRACH resource and the location adjustment information includes:
  • the first network device determines that at least a part of the first PRACH resources indicated by the time slot and/or symbol index is the second PRACH resource.
  • the location adjustment information includes unavailable time slot information
  • the unavailable time slot information is used to instruct the first network device to use a time other than the unavailable time slot
  • the first PRACH resource on the slot or indicates that the first network device cannot use the PRACH resource on the unavailable slot.
  • the position adjustment information includes unavailable system frame information
  • the unavailable system frame information is used to instruct the first network device to use a system other than unavailable The first PRACH resource on the system frame other than the frame, or indicates that the first network device cannot use the PRACH resource on the unavailable system frame.
  • the position adjustment information includes an available symbol index
  • the available symbol index indicates that the first network device can use the PRACH resource on the symbol corresponding to the available symbol index.
  • the position adjustment information includes an index of available symbols in the conflict slot, and the index of available symbols in the conflict slot indicates that the first network device can use the conflict slot
  • the position adjustment information further includes a conflict slot index.
  • the position adjustment information includes an unavailable symbol index, which indicates that the first network device cannot use the PRACH on the symbol corresponding to the available symbol index Resources, or instruct the first network device to use PRACH resources on symbols other than the symbol corresponding to the unavailable symbol index.
  • the position adjustment information includes an index of unavailable symbols in the conflict slot, and the index of unavailable symbols in the conflict slot indicates that the first network device cannot use the conflict
  • the PRACH resource on the symbol corresponding to the unavailable symbol index in the time slot
  • the position adjustment information includes an available time slot index
  • the available time slot index indicates that the first network device can use the time slot corresponding to the available time slot index. PRACH resources.
  • the position adjustment information includes a system frame offset and a time slot offset.
  • the technical solution in the embodiment of the present application can select the system frame offset, the time slot offset, and the symbol offset in combination, and can select appropriate position adjustment information according to specific situations, or use the above three At least two of the information jointly indicate the first network device, which ensures the resolution of the configuration problem when the random access resources of the first network device conflict.
  • the configuration information of the first PRACH resource is carried in a system broadcast message or a radio resource control configuration message.
  • the configuration information of the first PRACH resource may be initially configured through system messages, and when the configuration information of the first PRACH resource changes, the RRC configuration message is used for configuration.
  • the configuration information of the first PRACH resource is sent by the host base station, or the configuration information of the first PRACH resource is sent by an upper node of the first network device.
  • the configuration information of the first PRACH resource may be a PRACH configuration index.
  • the location adjustment information is sent to the first network device by a superior node or a home base station of the first network device.
  • the location adjustment information is determined by a host base station or an upper node of the first network device or a core network device.
  • the first network device may be an IAB node
  • the second network device may be a host base station or a superior node of the first network device.
  • the first network device may support half-duplex communication or full-duplex communication.
  • a method for configuring random access resources includes: a second network device acquires location adjustment information, where the location adjustment information is used to instruct adjustment of at least a part of PRACH resources in a first physical random access channel PRACH resource The location of the resource; the second network device sends the location adjustment information to the first network device.
  • Adjusting the first PRACH resource for example, on a time slot or symbol according to the position adjustment information, changing the position of the first PRACH resource, for example, on a time slot or symbol, and thus changing the first PRACH resource using the adjusted first PRACH resource
  • a configuration of random access resources of a network device thereby solving the problem of collision of random access resources used by the first network device.
  • the position adjustment information is used to indicate that the position of at least a part of the PRACH resources in the first PRACH resource is adjusted on a time slot or a symbol.
  • the second network device is a host base station
  • acquiring the position adjustment information by the second network device includes: the second network device according to the first PRACH resource Configuration information and configuration information of a third PRACH resource determine the location adjustment information and/or a second PRACH resource, the third PRACH resource is used by the first network device to receive a random access request, and the second PRACH resource The resource is used to receive the random access request sent by the first network device.
  • the second network device is a superior node of the first network device, and the second network device acquiring location adjustment information includes:
  • the second network device determines the location adjustment information according to the configuration information of the first PRACH resource and the configuration information of the third PRACH resource, and the third PRACH resource is used by the first network device to receive a random access request ;
  • the sending of the position adjustment information by the second network device to the first network device includes:
  • the second network device sends the location adjustment information to the first network device through a host base station, or the second network device directly sends the location adjustment information to the first network device.
  • the method further includes: the second network device receives configuration information of the third PRACH resource sent by a host base station or the first network device.
  • the second network device is a superior node of the first network device, and the second network device acquiring location adjustment information includes:
  • the second network device receives the location adjustment information sent by the host base station or the core network device.
  • the sending, by the second network device, location adjustment information to the first network device includes: the second network device forwarding the location sent by the host base station or the core network device through an air interface The location adjustment information, or the second network device sends the location adjustment information to the first network device through an air interface.
  • the position adjustment information includes at least one of the following information: slot offset, symbol offset, slot index, or symbol index.
  • the method further includes: the second network device determines a second PRACH resource according to the configuration information of the first PRACH resource and the location adjustment information, and the second PRACH resource The resource is used to receive the random access request sent by the first network device.
  • the position adjustment information includes a time slot or symbol offset
  • the second network device adjusts according to the configuration information of the first PRACH resource and the position adjustment
  • the information determines the second PRACH resource, including:
  • the second network device offsets at least a part of the PRACH resources in the first PRACH resource according to the offset of the time slot or symbol to obtain the second PRACH resource.
  • the first PRACH resource can be offset on the slot or symbol to obtain a second PRACH resource, so that the second network device determines to use random access on the backhaul link
  • the time slot or symbol of the incoming resource is staggered from the time slot or symbol of the random access resource used by the first network device on other links, to avoid PRACH resource conflicts on the time slot or symbol.
  • the method can also be applied to the case where PRACH resources are configured in each system frame, and the PRACH resources are shifted in time slots or symbols within the system frame, which can improve resource utilization.
  • the time slot numbers are not the same, but the time domain resources corresponding to the different time slots of the access link and the backhaul link The location may be the same, and there will be conflicts.
  • the symbols in the first PRACH resource that conflict with the third PRACH resource in the time domain can be offset to avoid collision.
  • the offset of the time slot or symbol is a positive number or a negative number.
  • a positive number indicates a backward offset, and a negative number indicates a forward offset; or a positive number indicates a forward offset, and a negative number indicates a backward offset.
  • the location adjustment information further includes location information of a target time slot or symbol
  • the second network device uses at least a part of the first PRACH resources according to The offset of the time slot or symbol is offset to obtain the second PRACH resource, including:
  • the target time slot or symbol is a time slot or symbol where the first PRACH resource and the third PRACH resource conflict.
  • collision time slot or “collision symbol” in the embodiments of the present application means that the first PRACH resource and the third PRACH resource are both configured on the conflict time slot or the conflict symbol.
  • the position adjustment information may indicate that the PRACH resource on the target time slot or symbol is offset, which is equivalent to offsetting only a part of the PRACH resource on the time slot or symbol. When only the PRACH resource in the conflicting time slot or conflicting symbol is offset, Then, it may not affect other non-conflicting time slots or symbols, and improve resource utilization.
  • the target time slot or symbol is determined by the second network device or the sink base station.
  • the second network device offsets at least a part of the PRACH resources in the first PRACH resource according to the offset of the time slot or symbol to obtain
  • the second PRACH resource includes:
  • the second network device determines a target time slot or symbol in which the first PRACH resource and the third PRACH resource collide in the time domain, and the third PRACH resource is used by the first network device to receive a random access request;
  • the position adjustment information includes an offset of the starting symbol index of the PRACH timing
  • the second network device changes the PRACH according to the offset of the starting symbol index of the PRACH timing The timing is shifted as a whole to obtain the second PRACH resource.
  • the PRACH resource on the symbol moved out of the current time slot is no longer valid.
  • the PRACH resources still on the symbols of the current time slot are still valid.
  • the position adjustment information includes the offset of the start symbol index of the PRACH timing
  • it may instruct to shift the entire PRACH timing according to the offset, and the overall offset efficiency is high.
  • the PRACH timing moved out of the current time slot is regarded as invalid, and the second network device cannot use the PRACH timing on the symbol of the PRACH timing, which can avoid affecting the resource configuration on other time slots.
  • valid in the embodiment of the present application means that the second network device can use the PRACH resource on the effective time slot or symbol indicated by the position adjustment information; “invalid” means that the second network device cannot use the position adjustment information
  • the PRACH resource on the indicated invalid time slot or symbol is no longer mapped to RO in the corresponding position, or the PRACH resource on the other time slot or symbol other than the valid time slot or symbol indicated by the second network device is not used.
  • the position adjustment information includes a time slot and/or symbol index, and the time slot and/or symbol index is used to indicate at least a part of the first PRACH resource
  • the PRACH resource is valid
  • the second network device determining the second PRACH resource according to the configuration information of the first PRACH resource and the location adjustment information includes:
  • the second network device determines that at least a part of the first PRACH resources indicated by the time slot and/or symbol index is the second PRACH resource.
  • Indicating the effective PRACH resources that can be used by the second network device through the index of the time slot or symbol can avoid affecting the resource configuration on other time slots or symbols configured with other resources.
  • the position adjustment information includes unavailable time slot information
  • the unavailable time slot information is used to instruct the second network device to use a time other than the unavailable time slot
  • the first PRACH resource on the slot or indicates that the second network device cannot use the PRACH resource on the unavailable slot.
  • the position adjustment information includes unavailable system frame information
  • the unavailable system frame information is used to instruct the second network device to use a system other than unavailable The first PRACH resource on the system frame other than the frame, or indicates that the second network device cannot use the PRACH resource on the unavailable system frame.
  • the position adjustment information includes an available symbol index
  • the available symbol index indicates that the second network device can use the PRACH resource on the symbol corresponding to the available symbol index.
  • the position adjustment information includes an index of available symbols in the conflict slot, and the index of available symbols in the conflict slot indicates that the second network device can use the conflict slot
  • the position adjustment information further includes a conflict slot index.
  • the position adjustment information includes an unavailable symbol index
  • the unavailable symbol index indicates that the second network device cannot use the PRACH on the symbol corresponding to the available symbol index Resources, or instruct the second network device to use PRACH resources on symbols other than the symbol corresponding to the unavailable symbol index.
  • the position adjustment information includes an index of unavailable symbols in the conflict slot, and the index of unavailable symbols in the conflict slot indicates that the second network device cannot use the conflict
  • the PRACH resource on the symbol corresponding to the unavailable symbol index in the time slot is not limited to the position adjustment information.
  • the position adjustment information includes an available time slot index
  • the available time slot index indicates that the second network device can use the time slot corresponding to the available time slot index. PRACH resources.
  • the position adjustment information includes a system frame offset and a time slot offset.
  • the technical solution in the embodiment of the present application can select the system frame offset, the time slot offset, and the symbol offset in combination, and can select appropriate position adjustment information according to specific situations, or use the above three At least two of the information together indicate the second network device, which improves resource utilization.
  • the configuration information of the first PRACH resource is carried in a system broadcast message or a radio resource control configuration message.
  • the configuration information of the first PRACH resource may be initially configured through system messages, and when the configuration information of the first PRACH resource changes, the RRC configuration message is used for configuration.
  • the first network device may be an IAB node
  • the second network device may be a host base station or a superior node of the first network device.
  • the sending, by the second network device, the location adjustment information to the first network device includes:
  • the second network device sends the location adjustment information to the first network device through an F1 application protocol AP interface, a radio resource control RRC message, or a medium access control element MAC.
  • the second network device is another IAB node
  • sending the position adjustment information to the first network device by the second network device includes: the second network device sends the first network device to the first network through the host base station.
  • the device sends location adjustment information, or directly sends the location adjustment information to the first network device. If the location adjustment information is generated by the second network device, at this time, the location adjustment information needs to be sent to the first network device through the host base station, or the location adjustment information may be sent directly to the first network device, such as through MAC CE.
  • the random access resource used by the second network device to receive the random access request sent by the first network device is the same as the random access resource used by the first network device to send the random access request to the second network device.
  • the second PRACH resource is the same as the random access resource used by the first network device to send the random access request to the second network device.
  • a communication device including a module or unit for performing the method in the first aspect or any possible implementation manner of the first aspect.
  • the communication apparatus of the third aspect may be the first network device mentioned above, or may be a component (eg, chip or circuit, etc.) used for the first network device.
  • a communication device including a module or unit for performing the method in the second aspect or any possible implementation manner of the second aspect.
  • the communication apparatus of the fourth aspect may be the second network device mentioned above, or may be a component (eg, chip or circuit, etc.) used for the second network device.
  • a communication device includes: at least one processor and a communication interface.
  • the communication interface is used for information interaction between the communication device and other communication devices.
  • a program instruction is in the at least one When executed in the processor, the communication apparatus is caused to realize the function of the above first network device.
  • a communication device includes at least one processor and a communication interface.
  • the communication interface is used for information interaction between the communication device and other communication devices.
  • a program instruction is in the at least one When executed in the processor, the communication device realizes the function of the above second network device.
  • a communication device includes: a transceiver, a processor, and a memory.
  • the processor is used to control the transceiver to receive and send signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the communication device performs the first aspect or any possible implementation of the first aspect The way in the way.
  • a communication device in an eighth aspect, includes a transceiver, a processor, and a memory.
  • the processor is used to control the transceiver to transmit and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the communication device performs the second aspect or any one of the second aspects Implementation method described.
  • a chip is provided for performing the method described in the first aspect or any possible implementation manner of the first aspect.
  • a chip is provided for performing the method described in the second aspect or any possible implementation manner of the second aspect.
  • a computer-readable storage medium in which instructions are stored, and when the instructions are run on a computer, the computer is caused to perform the first aspect or any one of the first aspects Possible implementation method.
  • a computer-readable storage medium in which instructions are stored, and when the instructions are run on a computer, the computer is caused to perform the second aspect or any one of the second aspects Possible implementation method.
  • a computer program product containing instructions that, when the computer program product runs on a computer, causes the computer to perform the method described in the first aspect or any possible implementation manner of the first aspect.
  • a fourteenth aspect there is provided a computer program product containing instructions that, when the computer program product runs on a computer, causes the computer to perform the method described in the second aspect or any possible implementation manner of the second aspect.
  • a communication system including the first network device and the second network device above.
  • FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application.
  • FIG. 2 is a schematic diagram of some network devices in an application scenario in an embodiment of the present application.
  • FIG. 3 is a schematic diagram of communication resources according to an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a random access resource configuration method according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of communication resources according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of communication resources according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of communication resources according to another embodiment of the present application.
  • FIG. 8 is a schematic diagram of communication resources according to yet another embodiment of the present application.
  • FIG. 9 is a schematic diagram of communication resources according to yet another embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a communication device according to another embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a communication device according to another embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a communication device according to another embodiment of the present application.
  • 15 is a schematic structural diagram of a communication device according to another embodiment of the present application.
  • FIG. 1 shows a schematic diagram of an application scenario of an embodiment of the present application.
  • the application scenario may include a host base station 110, relay stations 120 and 140, and terminals 130 and 150.
  • the host base station 110 which may also be referred to as a host station, is a base station that adds a relay function to a common base station.
  • the host base station 110 supports access by ordinary terminals such as the terminal 130 and also supports access by relay stations such as the relay station 120.
  • the base station can be used to connect terminal equipment to a wireless network (radio access network, RAN). Therefore, the base station is sometimes called an access network device or an access network node. It is understandable that in systems using different wireless access technologies, the names of devices with base station functions may be different. For convenience of description, the embodiments of the present application will collectively refer to devices that provide wireless access functions for terminals as base stations.
  • the ordinary base station may be an evolved node B (evolved node B, eNB) in a long term evolution (LTE) network
  • the host base station 110 may be represented as a DeNB (donor eNodeB, DeNB).
  • Ordinary base station can also be the next generation base station (gNB) in the fifth generation (5G) mobile communication system, then the host base station 110 can be expressed as DgNB (donor gNodeB, DgNB), ordinary base station It can also be other devices with base station functions or network devices in future 5G networks.
  • the host base station 110 may be a macro base station or a micro base station.
  • a host base station 110 may include one cell or multiple cells within the coverage area. Exemplarily, the cell covered by the host base station may be called a host cell, the host cell may cover different directions, and each host cell may be accessed A certain number of relay stations and terminals.
  • the relay station 120 is used to provide a wireless backhaul service for the host base station 110.
  • the relay station 120 can access the host base station 110 through a wireless signal and establish an air interface bearer, and can also support the access of terminals within the coverage area, such as terminal 150.
  • a relay station may also be called a wireless backhaul device, a relay device, a substation, a subnode, etc.
  • a relay station may be called an integrated access and backhaul (IAB) device or an IAB node.
  • the relay station and the relay station may be cascaded (i.e., multi-hop), as shown in FIG. 1 of the relay station 120 and the relay station 140.
  • the relay station 120 supports the access of the terminal 150 and also supports the access of the relay station 140.
  • the relay station 120 may be called a parent node or a superior node of the relay station 140, and the relay station 140 may be called a child node or a subordinate node of the relay station 120.
  • the relay station 140 may also have its own child nodes (not shown in the figure).
  • the parent node and the child node, the superior node and the inferior node are all relative concepts, for example, a certain relay station may be a child node of its parent node or a parent node of its child node.
  • the relay stations 120 and 140 are IAB nodes as an example for description.
  • the terminals 130 and 150 may communicate with one or more core networks (CN) via the base station.
  • Terminal equipment can also be called user equipment (user equipment (UE), access terminal, terminal, subscriber unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless network device, user Agent or user device.
  • UE user equipment
  • access terminal terminal, subscriber unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless network device, user Agent or user device.
  • Terminals can be cellular phones, cordless phones, session initiation protocol (SIP) phones, smart phones, wireless local loop (wireless local loop, WLL) stations, personal digital processing (personal digital) assistant, PDA), handheld device with wireless communication function, computing device or other device connected to a wireless modem, in-vehicle device, wearable device, drone device or Internet of Things, terminal in the Internet of Vehicles, and any in the future network Terminal, relay user equipment, or terminal in a public land mobile network (PLMN) that will evolve in the future.
  • PLMN public land mobile network
  • the above terminal devices that access the network are collectively referred to as a terminal, and in some embodiments, the UE may also be used to identify the terminal.
  • the terminal can directly access the host base station or the relay station. As shown in FIG. 1, the terminal 130 directly accesses the host base station 110, the terminal 150 accesses the relay station 120, the terminal 130 can also access the relay station, and the terminal 150 can also access Host base station, the terminal access status in the figure is just an example.
  • the link that the network device provides access services for the ordinary terminal is the access link
  • the link that the network devices transmit information and data to each other is the backhaul link.
  • the communication link 171 between the terminal 130 and the host base station 110, and the communication link 172 between the terminal 150 and the relay station 120 are all access links
  • the communication link 162 between the relay station 120 and the relay station 140 are all backhaul links.
  • the information and data transmitted on the backhaul link may include signaling and data sent from the core network or a higher-level network device node and necessary for the operation of the network device, as well as data and signaling of the terminal.
  • "two links" refer to any one of an access link and a backhaul link, a backhaul link and a backhaul link.
  • the numbers of host base stations, relay stations, and terminals in FIG. 1 are merely exemplary descriptions, and do not constitute any limitation on the embodiments of the present application, and the names of each node or device are only an example. In a specific implementation, the system The nodes or devices in the architecture may also have other names, which are not specifically limited in the embodiments of the present application.
  • an application scenario to which the technical solutions of the embodiments of the present application can be applied may include more or fewer nodes or devices.
  • FIG. 2 shows some network devices in the application scenario of FIG. 1.
  • the IAB device may include two parts of functional modules, namely a mobile terminal (mobile-termination, MT). ) Function module and distributed unit (DU) function module.
  • MT mobile terminal
  • DU distributed unit
  • the MT function module is used for the return function/module
  • the DU function module is used for the access function/module.
  • the MT function is defined as a component similar to the UE.
  • the MT can be referred to as a function residing on the IAB node.
  • the IAB node can access the upper node or the upper network through the MT.
  • the DU function is relative to the centralized unit (CU) function.
  • the base station function is divided into two parts, called CU-DU separation.
  • the CU includes the radio resource control (RRC) layer and packet data convergence protocol (PDCP) layer of the original LTE base station
  • the DU includes the radio link control (radio link control) , RLC) layer, media access control (MAC) layer and physical layer (PHY).
  • CU and DU can be physically connected through optical fiber, and logically can communicate through a specially defined F1 interface.
  • CU is mainly responsible for radio resource control and configuration, cross-cell mobility management, bearer management, etc.
  • DU is mainly responsible for scheduling, physical signal generation and transmission.
  • the access function and backhaul function of the IAB device are transmitted in a time division multiplexing (TDM) manner.
  • TDM time division multiplexing
  • the two functions cannot work at the same time, when only the access function or only the backhaul function is working, the access function or backhaul
  • the function can use all the resources of the system on the allocated time resources, including frequency domain resources and hardware resources.
  • random access (random access) resources are required.
  • the random access resources used by the UE can obtain the configuration information of the physical random access channel (physical random access channel, PRACH) by reading the network, such as base station equipment and broadcast system messages; the random access resources used by the IAB device can be passed The system information broadcast by the upper node or the host base station or the higher layer signaling message sent by the upper node or the host base station to obtain the configuration information of the PRACH resource.
  • the above PRACH resource configuration message may indicate time resources, frequency domain resources, preamble information, retransmission times, transmission power, etc. that can be used by the UE or the IAB device.
  • the PRACH resource configuration message as a physical random access channel configuration index (prach-configurationIndex) as an example for detailed description.
  • the physical random access channel configuration index has 256 index values in the range of 0-255.
  • the index value can be used to determine the format of the preamble and the time domain information of the PRACH resource.
  • the UE or IAB node can obtain the PRACH resource configuration information corresponding to the index, that is, the random access resource configured by the host base station or the upper node for the UE or IAB node.
  • Table 1 below shows a partial index and a protocol table of PRACH resource configuration information corresponding to the index.
  • the physical random access channel configuration index shown in the table is taken as an example for description. It should be understood that Table 1 is only an example and does not constitute a limitation on the present application.
  • Table 1 Physical random access channel configuration index and PRACH configuration information corresponding to the index
  • the first column of parameters is the PRACH configuration index.
  • the index value ranges from 0 to 255.
  • Each index value corresponds to a PRACH configuration.
  • the UE or IAB node can obtain the PRACH configuration index based on the index
  • the correspondence between the value and the PRACH configuration determines the time domain position of the random access resource configured by the host base station or the upper node for the UE or IAB node.
  • the PRACH configuration index may be more or less than the index value 256 given above
  • the index value corresponding to the PRACH configuration may also be updated or changed.
  • the embodiments of the present application only use this as an example to illustrate.
  • the second column of parameters is the preamble format.
  • the preamble format is related to the coverage radius of the cell. Different deployment scenarios, such as cell coverage radius, whether to support notification to the UE, etc., can select different preamble formats.
  • the preamble (preamble) is one of the actual contents sent by the UE or IAB node in the physical random access channel, and is composed of a cyclic prefix (CP) and a sequence (sequence), which is used to identify the user identity during random access.
  • CP cyclic prefix
  • sequence sequence
  • Different preamble formats have different CPs, sequence lengths, sequence repetition times, and guard interval lengths.
  • n SFN represents the system frame number
  • mod is the remainder calculation
  • y is the remainder.
  • PRACH is configured on the system frame number Resources. Therefore, it can be understood that when the system frame number is 1, 17, 33, ..., (16*a+1) (where a is an integer greater than or equal to 0), PRACH resources are configured on the system frame number.
  • PRACH resources are allocated to the current system frame number. Therefore, it can be understood that when the system frame number is 2, 10, 18, 26, (8*b+2) (where b is an integer greater than or equal to 0), PRACH resources are configured on the system frame number.
  • one system frame is 10 ms.
  • the increase in the system frame number may be expressed as the absolute time moving backward, for example, the frame number increases by 1, indicating that the absolute time has moved one system frame backward, that is, 10 ms backward.
  • the parameter in the fourth column of the table is the slot number, which further indicates which time slots are configured with PRACH resources on the system frame with PRACH resources.
  • the time-frequency resources of the LTE system can be divided into multiple 10ms radio frames in the time domain.
  • One radio frame contains 10 subframes of 1ms each.
  • 5G defines a new air interface access technology and introduces a variety of subcarrier spacing (SCS). Different subcarrier spacing can correspond to different slot lengths and symbol lengths. For example, for a system with a subcarrier spacing of 60KHz, a system frame can have a maximum of 40 time slots, and the length of each time slot is 0.25ms.
  • SCS subcarrier spacing
  • the 40 time slots are numbered from 0 to 39, which can be respectively written as time slot #0 (slot#0), time slot #1 (slot#1), ..., time slot #39 (slot#39) etc.
  • the time slot number in Table 1 can be understood as indicating which time slots are configured with PRACH resources in a 10ms system frame. Taking the time slot #39 configured with PRACH resources as an example, it means that within the system frame configured with PRACH resources, PRACH resources are configured in the last time slot.
  • different subcarrier intervals correspond to different time slot lengths.
  • a system frame has 80 time slots, and each time slot is 0.125ms.
  • the time slots are numbered from time slot 0 to time slot 79, and the above-mentioned time slot #39 configured with PRACH resources indicated by the subcarrier interval of 60 kHz corresponds to a system with a subcarrier interval of 120 kHz,
  • the last two time slots of the 10ms system frame are configured with PRACH resources on time slots 78 and 79. Therefore, it can be understood that different subcarrier intervals correspond to different slot lengths, and the time domain position indicated by the slot number should be determined according to their corresponding subcarrier intervals.
  • the parameter in the fifth column of Table 1 is the mapping start symbol. This parameter further indicates the number of symbols from which the PRACH resource is mapped on the time slot where the PRACH resource is configured.
  • a slot has 14 symbols.
  • the 14 symbols in a slot are sequentially numbered as symbol #0 to symbol #13, and symbol #0 is a slot The first symbol in.
  • the parameter in the fifth column is 0, indicating that the PRACH resource is mapped from the symbol No. 0 (that is, symbol #0 or the first symbol) in a time slot.
  • This parameter has no meaning for a subcarrier spacing of 60 kHz.
  • the parameter in the seventh column of the table is the number of PRACH opportunities in a PRACH slot, indicating how many PRACH opportunities there are in a slot in the time domain.
  • the parameter in the eighth column is the duration of the PRACH resource, indicating the length of a PRACH opportunity, in units of symbols. Taking the index in the table as 0 as an example, the PRACH resource duration of 2 indicates that the length of a PRACH opportunity is two orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols. Different PRACH opportunities may have different lengths, that is, different PRACH opportunities may include different numbers of OFDM symbols.
  • the third column of parameters indicates the system frame number is a multiple of 16, 1.
  • the fourth column of parameters indicates the slot number where PRACH resources are configured, and There are 6 PRACH opportunities in the PRACH resource start mapping symbol indicated by the fifth column of parameters and one slot indicated by the seventh column of parameters. It can be concluded that when the PRACH configuration index is 0, the system frame number is 1, 17, 33 , ..., etc., PRACH resources are allocated in time slots #4, #9, #14, #19, #24, #29, #34, #39.
  • each PRACH opportunity also known as random access channel (RACH) opportunities, which can also be expressed as RACH opportunities (RACH occasions, RO), including opportunity 1 (RO31) to opportunity 6 (RO36), each PRACH timing length is 2 symbols, so PRACH resources are allocated from symbol #0 to symbol #11.
  • RACH random access channel
  • RO RACH opportunities
  • opportunity RO31 includes symbol #0 and symbol #1
  • timing RO32 includes symbol #2 and symbol #3
  • timing RO36 includes symbol #10 and symbol #11.
  • the time domain positions of the corresponding PRACH resources may be the same or partially overlap.
  • each system frame in the two configurations is configured with PRACH resources; further, from the perspective of a time slot In both configurations, the time slot #19 and time slot #39 are configured with PRACH resources; furthermore, the two configurations are configured with the PRACH resource in the time slots #19 and #39, the PRACH start symbol, PRACH timing
  • the number and duration of PRACH are the same, that is to say, in both configurations, PRACH resources are completely the same in time slots #19 and #39.
  • an IAB node since it needs to access the upper node at the same time, it also needs to receive the random access preamble sent by the terminal served by the IAB node or the lower IAB node, which may cause the PRACH resources of the two links of the IAB node to be in time. Overlapping in the domain, it can also be called that the PRACH resources of the two links conflict in the time domain, that is, the PRACH resources of the two links have any intersection or intersection in the time domain.
  • the two links here can refer to the access link and the backhaul link, and can also refer to the backhaul link and the backhaul link, where the backhaul link and the backhaul link include the backhaul of the IAB node and the superior node
  • the sum of available resources is fixed for the access link and the backhaul link.
  • the IAB when the UE wants to access the network, the IAB as a network device needs to provide the UE with access services, that is, the PRACH resource needs to be configured for the UE, and the random access request sent by the UE needs to be received; the IAB node needs to connect When entering the host base station or superior node, the host base station or superior node needs to configure PRACH resources for it.
  • the IAB node has a half-duplex constraint, if the PRACH resource configured by the IAB node for the UE and the PRACH resource configured by the superior node for the IAB node are the same or partially overlap in the time domain, when the IAB node receives a random access request from the UE , Unable to send random access request to superior node or host base station.
  • the PRACH configuration on the access link takes precedence . That is, no transmission of the RACH preamble is performed on the PRACH resources that have collided on the backhaul link.
  • This method can simplify the protocol, which can be solved only by defining the access link PRACH priority. At the same time, considering that the random access process on the backhaul link does not happen frequently, therefore, the impact on the system is relatively small. It should be understood that this scheme cannot be used when the PRACH resource configuration on the access and backhaul links is exactly the same.
  • the above-mentioned PRACH priority scheme of the access link may cause the IAB node to wait due to the invalid PRACH resources on part of the backhaul link when the backhaul link of the IAB node is abnormal and the scenario where the scheduling request is requested is sent. It may take a long time to access the network.
  • the network configures a PRACH resource dedicated to the IAB node for it. Since the current standard defines 256 different PRACH configurations, the method of configuring dedicated PRACH resources not only limits the flexibility of the network to select the PRACH configuration, but is also likely to conflict with the PRACH resources configured by the IAB node for the UE in the time domain.
  • IAB nodes are explicitly configured with different parameters of PRACH resources, such as the system frame number, time slot number, symbol position, etc. This display configuration will cause excessive overhead for each parameter.
  • Another possible implementation method is to explicitly configure the system frame number for the IAB node, so that the above two PRACH resources are on different system frames to achieve orthogonalization of PRACH resources across adjacent hops, but this method It is no longer valid if PRACH resources are present on each system frame.
  • An embodiment of the present application provides a random access resource configuration method that can solve the problem of the random access resource configuration of the IAB node on the access link and the return link. The following describes the embodiment of the present application in detail with reference to FIG. 4.
  • the access function and the backhaul function of the IAB can also support space division multiplexing or full-duplex communication.
  • the embodiment of this application only uses the time division multiplexing transmission method of the IAB in the time division duplex system as an example. Sexual description.
  • FIG. 4 shows a schematic flowchart of a random access resource configuration method according to an embodiment of the present application.
  • the method of FIG. 4 may be performed by the first network device.
  • the first network device may be, for example, the relay station 120 shown in FIGS. 1 and 2, such as an IAB device.
  • the method includes steps S410 to S440.
  • step S410 the first network device receives configuration information of the first PRACH resource.
  • the first network device may be the relay station 120 shown in FIG. 1 or FIG. 2.
  • the first network device may be a device that performs half-duplex communication or a device that performs full-duplex communication.
  • the first network device may be an IAB node.
  • the configuration information of the first PRACH resource indicates the initial PRACH resource configured by the network for the first network device when the first network device initially accesses.
  • the configuration information of the first PRACH resource may be received by the first network device from the second network device or from other network devices, and the second network device may be the host base station 110 shown in FIG. 1 or FIG. 2 , May also be a superior node of the first network device, such as a superior IAB node.
  • the configuration information of the first PRACH resource may be sent to the first network device by the superior IAB node, or may be sent by other network devices such as the host base station; if the second network device As the host base station, the configuration information of the first PRACH resource may be sent by the host base station to the first network device, or may be sent by other network devices such as a superior IAB node.
  • the configuration information of the first PRACH resource can be configured through a broadcast system message, can also be configured through an RRC configuration message, or can be configured through a new signaling message, such as a newly added resource indication signaling or resource configuration signaling, etc. Configuration.
  • the configuration information of the first PRACH resource may be initially configured through a system message, and when the configuration information of the first PRACH resource changes, the RRC configuration message is used for configuration.
  • the configuration information of the first PRACH resource may be a PRACH configuration index or other information that may indicate the configuration of the first PRACH resource.
  • step S420 the first network device receives location adjustment information.
  • the position adjustment information is used to instruct to adjust the position of at least a part of the PRACH resources in the first PRACH resource on the time slot or symbol to determine the second PRACH resource.
  • the second PRACH resource is used by the first network device to send a random access request to the second network device.
  • the first PRACH resource overlaps with the third PRACH resource configured by the first network device for the UE or the child node of the first network device in the time domain, and the second PRACH resource obtained after the first PRACH resource is adjusted according to the position adjustment information and
  • the third PRACH resources do not overlap in the time domain.
  • the waveform parameters include at least one of subcarriers and transmission time interval (TTI).
  • the location adjustment information may be sent to the first network device by a superior node of the first network device, or may be sent to the first network device by the host base station.
  • the position adjustment information may be sent by the same network device, for example, the second network device, to the first network device together with the configuration information of the first PRACH resource, or may be sent by different network devices to the first network device at different times.
  • step S410 and step S420 may be performed simultaneously or separately. In some embodiments, step S410 and step S420 may be reversed.
  • the second network device From the perspective of the second network device, it is also necessary to obtain position adjustment information, which is used to indicate that the position of at least a part of PRACH resources in the PRACH resources of the first physical random access channel is adjusted on the time slot or symbol. By acquiring the location adjustment information, the second network device can also determine the second PRACH resource. The second network device may receive the random access request sent by the first network device on the second PRACH resource.
  • the location adjustment information may be determined by the host base station.
  • the host base station can obtain the PRACH resource configuration information of multiple access links and backhaul links in its serving cell, and naturally can obtain the PRACH resources on the two links of the first network device in the time domain Position information, and then determine the position adjustment information.
  • the location adjustment information may be determined by a superior node of the first network device, and the superior node of the first network device is another IAB node.
  • the superior node of the first network device may determine the time when the first network device receives the random access request according to the time when the first network device receives the random access request, and the position adjustment information may be determined; or, the first network device The superior node of may determine the position adjustment information according to the position information of the PRACH resources on the two links of the first network device in the time domain.
  • the location adjustment information may also be determined through a core network device, such as an operation and maintenance server (operation and management).
  • a core network device such as an operation and maintenance server (operation and management).
  • the operator may configure the random access resources of the first network device through a remote server through an algorithm or manually, and the location adjustment information may also be included.
  • the second network device may also receive location adjustment information from the host base station to adjust the access PRACH resource of the first network device on the access link to obtain the second PRACH resource And receive the PRACH resource sent by the first network device on the second PRACH resource.
  • the second network device may also receive the PRACH resource of the access link of the first network device sent by the host base station, that is, the configuration of the third PRACH resource.
  • the second network device uses the first PRACH resource and The third PRACH resource determines the position adjustment offset.
  • the position adjustment information may be an instruction to adjust the position of the first PRACH resource on the system frame, may be an instruction to adjust the position of the first PRACH resource on the time slot, or may be an instruction to adjust the position of the first PRACH resource on the symbol, or It may indicate the valid or invalid state of the first PRACH resource on the time slot or symbol, or a combination of one or more of the above indication methods.
  • valid means that the first network device can use the PRACH resource on the valid time slot or symbol indicated by the location adjustment information
  • “invalid” means that the first network device cannot use the location adjustment information.
  • the PRACH resource on the indicated invalid time slot or symbol is no longer mapped to RO in the corresponding position, or the PRACH resource on the other time slot or symbol other than the valid time slot or symbol indicated by the first network device is not used.
  • step S430 the first network device determines the second PRACH resource according to the configuration information and position adjustment information of the first PRACH resource.
  • the second PRACH resource is obtained by adjusting the first PRACH resource in the time domain.
  • the second PRACH resource is used by the first network device to send a random access request to the second network device.
  • the second PRACH resource does not conflict with the third PRACH resource configured by the first network device for the UE or the child node of the first network device in the time domain.
  • the first network device may determine the time domain information of the first PRACH resource according to the configuration information of the first PRACH resource.
  • the first network device determines the second PRACH resource.
  • the position adjustment information may include a slot offset (slot offset), and the slot offset may be a positive number or a negative number.
  • a positive number indicates a backward offset, and a negative number indicates a forward offset.
  • a positive number indicates a forward offset, and a negative number indicates a backward offset.
  • the specific meaning of this application is not limited.
  • the first network device may offset at least a part of the PRACH resources in the first PRACH resource according to the time slot offset to obtain the second PRACH resource.
  • the first network device may determine, according to the configuration information of the first PRACH resource, time slot information configured with the first PRACH resource, such as time slot number, etc., and adjust at least a part of the PRACH resources in the first PRACH resource according to position adjustment information If the indicated time slot offset is offset, the first network device may determine the PRACH resource after the first PRACH resource is offset on the time slot and the PRACH resource on which the first PRACH resource is not offset. It is the second PRACH resource.
  • the position adjustment information is used to indicate that all resources of the first PRACH resource are shifted on the time slot, and then the first network device may shift the first PRACH resource to the new slot position according to the slot offset All resources of are determined as the second PRACH resource.
  • the position adjustment information is used to indicate that a part of the PRACH resources in the first PRACH resource is offset on the time slot, then the first network device may offset a part of the new time slot position according to the time slot offset
  • the PRACH resource and the remaining PRACH resource without offset are determined as the second PRACH resource.
  • the location adjustment information may further include location information of the target time slot, and the first network device may offset the PRACH resource on the target time slot to obtain the second PRACH resource.
  • the target time slot may be at least a part of time slots where the first PRACH resource conflicts with the third PRACH resource, or may be any part of time slots, or all time slots.
  • the location adjustment information indicates that the PRACH resource in which the first PRACH resource and the third PRACH resource conflict on the target time slot is offset.
  • the first The network device may determine the PRACH resource offset to the new time slot position, and the PRACH resource that does not conflict with the first PRACH resource and the third PRACH resource in the time slot is the second PRACH resource.
  • resource overlap and resource conflict have the same meaning and can be replaced with each other;
  • the resource conflict time slot may be called a conflict time slot, and the resource conflict symbol may be called a conflict symbol.
  • the first network device may obtain the time slot where the first PRACH resource conflicts with the third PRACH resource.
  • the first network device After being determined by the superior node or the host base station of the first network device, the first network device is notified through location adjustment information.
  • the location adjustment information may include that the first PRACH resource conflicts with the third PRACH resource Time slot information, such as the conflict time slot number, which can also be understood as the target time slot described above.
  • the first network device may determine the time slot in which the first PRACH resource conflicts with the third PRACH resource according to the configuration information of the first PRACH resource and the configuration information of the third PRACH resource. For example, the first network device may determine corresponding configuration information through the first PRACH configuration index and the third PRACH configuration index, and determine that the first PRACH resource and the third PRACH resource have the same time slot number, or the corresponding time slot number is at the time The positions in the domain are the same, and it is determined that the time slot numbers of the first PRACH resource and the third PRACH resource are both configured, which are conflict time slots.
  • the time slot numbers are not the same, but the time domain resources corresponding to the different time slots of the access link and the backhaul link The location may be the same, and there will be conflicts. Therefore, the conflicting time slot of the first PRACH resource can be determined by the correspondence relationship between the time slots of the access link and the backhaul link in the time domain, and then the time slot of the PRACH resource to be adjusted on the backhaul link can be determined.
  • the position adjustment information may include unavailable time slot or system frame information, such as time slot number or system frame number.
  • the location adjustment information indicates which time slots or system frames are unavailable in the first PRACH resource, and the first network device may divide the time slots or system frames configured with the first PRACH resource by unavailable time slots or Outside the system frame, the first PRACH resource in other time slots or system frames is determined as the second PRACH resource.
  • the position adjustment information may include a symbol offset.
  • the first network device may offset at least a part of the first PRACH resources according to the symbol offset to obtain the second PRACH resource.
  • the first network device may determine the slot information and symbol information configured with the first PRACH resource according to the configuration information of the first PRACH resource, such as slot number, PRACH timing, number of RO symbols, and PRACH resource mapping Starting symbol number, etc., at least a part of the first PRACH resource is shifted according to the symbol offset indicated by the position adjustment information, then the first network device may shift the first PRACH resource on the symbol
  • the PRACH resource in which the PRACH resource and the first PRACH resource are not offset on the symbol is determined as the second PRACH resource.
  • the symbol offset may be an offset indicating an individual symbol, or may be an offset indicating the RO start symbol index.
  • the position adjustment information is used to indicate that all resources of the first PRACH resource are offset on the symbol, and the first network device may offset all resources of the first PRACH resource according to the symbol offset to the new symbol position Determined as the second PRACH resource.
  • the position adjustment information is used to indicate that a part of the PRACH resources in the first PRACH resource is offset on the symbol, then the first network device may offset a part of the PRACH resources and the part of the PRACH resource according to the symbol offset to the new symbol position and The remaining PRACH resource without offset is determined as the second PRACH resource.
  • the location adjustment information may further include location information of the target symbol, and the first network device may offset the PRACH resource on the target symbol to obtain the second PRACH resource.
  • the target symbol may be at least a part of the symbol where the first PRACH resource conflicts with the third PRACH resource, or may be any part of the symbol, or all symbols.
  • the position adjustment information indicates that the PRACH resource that overlaps the first PRACH resource and the third PRACH resource in the time slot or time domain is performed on the symbol Offset.
  • the first network device may determine the PRACH resource offset to the new symbol position, and the PRACH resource in which the first PRACH resource and the third PRACH resource do not overlap in symbol is the second PRACH resource.
  • the time slot numbers are not the same, but the time domain resources corresponding to the different time slots of the access link and the backhaul link The location may be the same, and there will be conflicts.
  • the symbols in the first PRACH resource that conflict with the third PRACH resource in the time domain can be offset to avoid collision.
  • the position adjustment information may include the offset of the RO starting symbol index
  • the first network device may obtain the PRACH timing of the first PRACH resource in the time domain and the length (number of symbols) of each PRACH timing. Because of the PRACH timing The middle symbol can be continuous, and the position adjustment information indicates the offset of the starting symbol index of the PRACH timing, that is, the entire PRACH timing can be offset by itself, which is equivalent to offsetting the PRACH resource on each symbol shift.
  • the position adjustment information is used to indicate the RO start symbol index offset
  • the method is also applicable to the overall offset or partial offset of the first PRACH resource on the symbol, and the first network device determines the second PRACH
  • the method of resources is similar to the method described above. For brevity, it will not be repeated here.
  • the first PRACH resource is shifted according to the symbol offset, the first PRACH resource is shifted out of the current time slot or to the next time slot, then the PRACH on the symbol of the current time slot is moved out
  • the resource is no longer valid, and the PRACH resource still on the symbol of the current time slot after the offset is still valid. In this way, it is possible to avoid the influence on the signal transmission on other time slots due to the deviation of the current time slot.
  • the first network device may obtain the conflicting symbols in the overlapping time slots of the first PRACH resource and the third PRACH resource.
  • overlapping time slots or conflicting time slots refer to time slots where the conflicting resources in the first PRACH resource are located, and the time slot numbers where the conflicting resources in the third PRACH resource are located may be the same or different.
  • the waveform parameters (such as subcarrier spacing) of the access link and the backhaul link are inconsistent
  • the time slot numbers of the first PRACH resource and the third PRACH resource are different
  • overlapping time slots or conflicting time slots refer to the first PRACH resource
  • the time slot corresponding to the first PRACH resource when the third PRACH resource is at the same position in the time domain. The following is the same and will not be repeated here.
  • the superior node or the host base station of the first network device may determine the conflicting time slot and/or conflicting symbol, and then notify the first network device of the location adjustment information.
  • the location adjustment information may include the first PRACH
  • the resource and the third PRACH resource have conflicting slot information and/or symbol information, such as a conflicting slot number and/or conflicting symbol number, and the conflicting symbol can be understood as the target symbol described above.
  • the first network device may determine the symbol of the conflict between the first PRACH resource and the third PRACH resource according to the configuration information of the first PRACH resource and the configuration information of the third PRACH resource. For example, the first network device may pass the A PRACH configuration index and a third PRACH configuration index determine the corresponding configuration information, determine the symbol numbers of the first PRACH resource and the third PRACH resource, and then determine the symbol numbers of the first PRACH resource and the third PRACH resource, This is the conflict symbol.
  • the position adjustment information may include time slot or symbol index.
  • the time slot or symbol index is used to indicate which time slot or symbol the random access resource on the first network device may or may not use.
  • the position adjustment information may include a system frame index and/or period, and the system frame index and/or period are used to indicate which system frames on the first network device may or may not use random access Incoming resources, or it can be understood that the system frame index and/or period are used to indicate how often the first network device interval can be used or not to use random access resources on the system frame.
  • the period may be understood as a time interval in which the first network device initiates two random accesses, that is, a time interval instructing the first network device to use the second PRACH resource.
  • the first network device can normally receive the configuration information of the first PRACH resource, and the first network device can determine the first PRACH resource configured for use by the first network device according to the configuration information of the first PRACH resource, and the location adjustment information includes During the period, the first network device can also determine which system frame random access resources can be used in the first PRACH resource and which system frame random access resources cannot be used according to the period in the location adjustment information, that is, according to the location The period in the adjustment information determines how long the interval can use the random access resource on the system frame on the first PRACH resource.
  • the position adjustment information may include an available symbol index
  • the available symbol index indicates a symbol that can be used by the first network device
  • the first network device may determine the first PRACH resource on the symbol corresponding to the available symbol index as the second PRACH resource.
  • the available symbol index applies to all time slots where the first PRACH resource exists.
  • the available symbol index may be configured by the superior node or the host base station.
  • the position adjustment information indicates the number of the PRACH timing or the number of the starting symbol in the PRACH timing
  • the first network device may determine the first PRACH resource on the PRACH timing or symbol indicated in the position adjustment information as the second PRACH Resources.
  • the position adjustment information may include the available symbol index in the conflict slot, in which case, the available symbol index is applicable to the conflict slot, that is, the position adjustment information indicates which symbols in the conflict slot are available for PRACH resources.
  • the first network device can divide the PRACH resource on the available symbol in the conflicting time slot and the time slot where the first PRACH resource is located.
  • the PRACH resources on the time slots other than the conflicting time slots are determined as the second PRACH resource.
  • the position adjustment information may also include the index or number of the conflicting time slot, which is used by the first network device to determine the conflicting time slot; or the first network device determines the conflict according to the configuration information of the first PRACH resource and the third PRACH resource. Time slot, and then determine the symbols available for the first PRACH resource according to the position adjustment information in the conflict time slot.
  • the position adjustment information may include an unavailable symbol index, which is used to indicate which symbols in the conflicting time slot the first network device cannot use, and PRACH resources on other symbols that are not indicated can be used . If the unavailable symbol index is applicable to all time slots configured with the first PRACH resource, the first network device may determine all or part of the symbols in the first PRACH resource time slot except the unavailable symbol as The second PRACH resource; if the unavailable symbol index is applicable to the symbol configured with the first PRACH resource in the conflicting time slot, the first network device may combine some or all other symbols in the conflicting time slot except the unavailable symbol and The PRACH resource (symbol) on the non-collision time slot is determined as the second PRACH resource.
  • an unavailable symbol index is applicable to all time slots configured with the first PRACH resource
  • the first network device may determine all or part of the symbols in the first PRACH resource time slot except the unavailable symbol as The second PRACH resource; if the unavailable symbol index is applicable to the symbol configured with the first PRACH resource in the conflicting time slot, the first network device may
  • the method for determining the conflicting time slot is similar to the method for determining the conflicting time slot when the position adjustment information is an available symbol.
  • the location adjustment information may include an available time slot index, and the available time slot index is used to indicate which time slots can be used by the first network device. If the available time slot index is applicable to all system frames configured with the first PRACH resource, the first network device may determine the first PRACH resource on the time slot corresponding to the available time slot index as the second PRACH resource; if the available time slot The index is applicable to the system frame where the first PRACH resource overlaps with the third PRACH resource/collision, then the first network device determines the first PRACH resource on the available time slot in the overlapping/collision system frame and the system without overlap/collision The first PRACH resource in the frame is the second PRACH resource.
  • the available time slot index may be configured by the superior node or the host base station,
  • the second PRACH resource determined by the first network device is a subset of the first PRACH resource.
  • the above describes the method for the first node to determine the second PRACH resource from the perspective of the first network device. From the perspective of the second network device, location adjustment information and/or second PRACH resources also need to be determined.
  • the second network device acquires position adjustment information, and the position adjustment information is used to indicate that the position of at least a part of PRACH resources in the first physical random access channel PRACH resource is adjusted on the time slot or symbol; the second network device sends the first network device Position adjustment information.
  • the second network device may be a host base station.
  • the second network device since the second network device has all the IAB nodes it controls, that is, the configuration information of the third PRACH resource of the first network device, the first The three PRACH resources include resources for the first network device to receive random access on the access link, and the second network device may determine the position adjustment according to the PRACH resource of the superior node of the first network device and the third PRACH resource of the first network device information.
  • the second network device also needs to determine the second PRACH resource.
  • the method is the same as that in the foregoing embodiment, and details are not described here.
  • the method for determining the position adjustment information is as described above and will not be repeated here.
  • the second network device may also receive the random access request sent by the first network device on the second PRACH resource.
  • the second network device may be another IAB node. At this time, if the position adjustment information obtained by the second network device is received from the host node, the method for determining the second PRACH resource by the second network device is the same as that of the first network device, and will not be described in detail. If the second network device determines the position adjustment information by itself through the third PRACH resource, the second network device may determine the second PRACH resource when determining the position adjustment information.
  • the second network device may also obtain the third PRACH resource of the first network device through mutual measurement between the nodes without receiving the third PRACH of the first network device from the host base station Resources.
  • the second network device may also send the location adjustment information of the first network device to the host base station, which is enhanced through the F1AP (F1 application protocol (F1AP) interface (F1 application protocol interface) or F1AP enhancement
  • F1AP F1 application protocol
  • F1AP interface F1 application protocol interface
  • F1AP enhancement F1 application protocol
  • the interface sends the position adjustment information to the first network device; or the second network device directly sends the position adjustment information to the first network device through MAC signaling (MAC control (element, MAC) CE) (medium access control element).
  • the location adjustment information may also be sent to the first network device through other signaling methods, such as RRC messages, dedicated signaling, and so on.
  • RRC messages dedicated signaling
  • the specific method is not limited in this application.
  • the F1AP interface is used to indicate the F1AP interface or the F1AP enhanced interface, which will not be described in detail.
  • the second network device is another IAB node.
  • the second network device sending the position adjustment information to the first network device includes: the second network device sends the position adjustment information to the first network device through the host base station, or Send location adjustment information directly to the first network device. If the location adjustment information is generated by the second network device, at this time, the location adjustment information needs to be sent to the first network device through the host base station, or the location adjustment information may be sent directly to the first network device, such as through MAC CE.
  • the location adjustment information is sent by the host base station to the second network device, the location adjustment information also needs to be sent to the first network device.
  • the host base station may forward the location adjustment information to the first network device through the second network device.
  • the second network device sends the location adjustment information to the first network device mainly to forward the location adjustment information of the host base station.
  • Another possible implementation is that, after receiving the position adjustment information sent by the host base station, the second network device sends the position adjustment information to the first network device through an air interface, such as MAC CE.
  • the donor base station may send location adjustment information to the first network device through an RRC message or an F1AP interface or an enhanced F1AP interface.
  • the second network device merely forwards the location adjustment information sent by the donor base station to the first network device.
  • the second network device may further include: determining a second PRACH resource.
  • the method for determining the second PRACH resource is as described above and will not be repeated here.
  • the second network device may further include receiving the random access request sent by the first network device on the second PRACH resource in S440. The details are as follows and will not be repeated here.
  • step S440 the first network device sends a random access request to the second network device on the second PRACH resource.
  • the second PRACH resource and the third PRACH resource have not overlapped in time domain position. Therefore, when the first network device receives the random access request sent by the UE or its child nodes, if the first network device also A random access request needs to be sent to the second network device. Since the second PRACH resource and the third PRACH resource have been staggered in time domain position, it can avoid that the first network device needs to send a random access request while receiving the random access request. Into the request.
  • the first network device determines the second PRACH resource according to the configuration information and position adjustment information of the first PRACH resource, and sends a random access request to the second network device on the second PRACH resource.
  • the second network device To successfully receive the random access request sent by the first network device, the second network device also needs to determine the second PRACH resource.
  • the second network device may determine the position adjustment information and/or the second PRACH resource according to the configuration information of the first PRACH resource and the configuration information of the third PRACH resource.
  • the donor base station may determine the position and location of the first PRACH resource and the third PRACH resource in the time domain based on the known configuration information of the first PRACH resource and the configuration information of the third PRACH resource In case of conflict, the location adjustment information and the second PRACH resource are determined.
  • the host base station may send the position adjustment information to the first network device, so that the first network device determines the second PRACH resource; the host base station may directly use the determined second PRACH resource to receive the random access request sent by the first network device.
  • the superior node may adjust the information and known configuration information of the first PRACH resource according to the received location, Determine the second PRACH resource.
  • the upper node may receive the position adjustment information from the host base station or the core network device.
  • the method for the second network device to determine the second PRACH resource is similar to the method described in step S430. For simplicity, it is not repeated here.
  • the superior node may determine the position adjustment information and/or the first position adjustment information according to the received configuration information of the third PRACH resource and the known configuration information of the first PRACH resource 2. PRACH resources.
  • the manner in which the upper node receives the configuration information of the third PRACH resource may have the following non-limiting implementations.
  • the second network device receives configuration information of the third PRACH resource of the first network device. Specifically, the second network device may receive the third PRACH resource configuration about the subordinate node from the host base station, or the second network device receives the third PRACH resource configuration sent from the first network device.
  • the second network device can receive the third PRACH resource configuration about the subordinate node from the donor base station, the RRC message of the donor base station is received through the MT of the second network device, and the RRC message includes the third PRACH resource configuration. It should be understood that at this time, the second network device is another IAB node. If the second network device has multiple subordinate nodes, the RRC message should include the third PRACH resource configuration of the multiple subordinate nodes. The second network device determines conflicting time slots and position adjustment information according to the third PRACH resource configuration. The specific method is similar to the method in the foregoing embodiment, and details are not described again.
  • the third PRACH resource configuration notification may be performed through MAC CE.
  • This application does not limit the specific MAC CE message format.
  • the second PRACH resource may be directly notified to the second network device after being determined by the superior node or the host base station of the second network device. That is, the second PRACH resource directly received by the second network device.
  • the first network device can adjust the configured first PRACH resource on the time slot or symbol, and use the adjusted second PRACH resource for random access, which can avoid the IAB node access link and backhaul
  • the collision of PRACH resources on the link results in a situation where random access resources are not available on the backhaul link or the access link.
  • By adjusting the time-domain position of the access resources on the backhaul link to keep the access resources available on the backhaul link it resolves the conflict between the random access resources of the IAB node on the access link and the backhaul link Configuration problem to avoid the problem of long waiting time caused by IAB nodes when random access is required.
  • the IAB node since the IAB node supports terminal access and also supports the access of its lower-level nodes, when the return link between the IAB node and the lower-level node is the same as the PRACH resource on the return link between the IAB node and the upper-level node In case of conflict, the solution in the above embodiment can also be applied. In other words, the embodiments of the present application are not limited to the conflict between the PRACH resources on the access link and the return link of the IAB node, or the PRACH resources on the back link and the return link of the IAB node.
  • the method of the embodiment of the present application can be applied to a scenario where two PRACH configuration resources overlap or collide on some system frames, and can also be applied to a scenario where two PRACH resource configurations overlap on each system frame, for example
  • the case where the PRACH resources used by the two links overlap on each system frame is used as an example for illustration, but as described above, the present application implements The example method can also be applied to the scenario where the PRACH resources of two links overlap only on part of the system frame.
  • FIG. 5 is a schematic diagram of communication resources according to an embodiment of the present application. The figure assumes that the access link and the return link use the same waveform parameters, such as subcarrier spacing.
  • the PRACH configuration index and other configuration information corresponding to the communication resource are shown in Table 2.
  • the position adjustment information includes the slot offset.
  • the numbering of time slots and symbols starts from #0, that is, the time slot No. 0 (#0) corresponds to the first time slot, and the symbol No. 0 (#0 ) Corresponding to the first symbol, and so on, the time slot or symbol is increased by 1, and the number of the time slot or symbol is increased by 1 on the basis of the previous time slot number.
  • a system frame has 40 time slots at 10 ms, numbered from time slot #0 to time slot #39, and a time slot at 0.25 ms has 14 symbols , Numbered from symbol #0 to symbol #13.
  • This example is also applicable in the following embodiments. For brevity, details are not described in the following embodiments.
  • the exemplary PRACH configuration indexes are 127 and 128 and their corresponding PRACH configuration information.
  • the embodiment of the present application makes the following assumption: the PRACH configuration index broadcast by the first network device to the UE is 127 , The first network device receives the PRACH configuration index sent by the upper node or the host base station as 128. That is, the PRACH configuration index 128 corresponds to the configuration information of the first PRACH resource, and the PRACH configuration index 127 corresponds to the configuration information of the third PRACH resource; the first PRACH resource is configured by the second network device for the first network device The initial PRACH resource and the third PRACH resource are PRACH resources configured by the first network device for the UE or its child nodes.
  • the first network device may receive the random access request sent by the UE or its child nodes on the third PRACH resource.
  • the first network device is an IAB node as an example for description
  • the second network device may be a superior node or a home base station of the IAB node.
  • Step 1 The IAB node can obtain the first PRACH resource configuration by receiving the system message broadcast by the superior node, or receiving the RRC configuration sent by the superior node or the host base station. Specifically, the MT function of the IAB node receives the above configuration.
  • Step 2 The IAB node receives the time slot offset sent by the superior node or the host base station.
  • the time slot offset is -1.
  • the time slot offset can be sent by the superior node or the home base station; when the second network device is the home base station, that is, the superordinate of the IAB node The node is the home base station, and the time slot offset is sent by the home base station.
  • the time slot offset may be determined by the donor base station, and then the donor base station notifies the superior node or IAB node of the IAB node.
  • Step 3 According to the received configuration information of the first PRACH resource, the IAB node determines the slot number configured with the PRACH resource indicated by the configuration information of the first PRACH resource.
  • the IAB node determines the time domain position of the PRACH resource (that is, the second PRACH resource) actually configured by the upper node or the host base station according to the time slot offset received in step two.
  • the IAB node may offset all resources of the first PRACH resource. At this time, in this step, the IAB node may not acquire the time slot where the third PRACH resource is located.
  • the slot positions of the third PRACH resource are shown in Table 2 and FIG. 5, but it should be understood that the slot position of the third PRACH resource is determined in this The examples are optional steps.
  • PRACH resources overlap in each system frame; further, according to the parameters in the fourth column, it can be seen that the two The PRACH resources (ie, the first PRACH resource and the third PRACH resource) all overlap on time slots #9, #19, #29, and #39. As shown in FIG. 5, on a system frame, the positions of the first PRACH resource and the third PRACH resource in the time slot are as shown in the figure.
  • the first row shows the position of the third PRACH resource corresponding to the PRACH configuration index 127 on the time slot within a system frame, where the third PRACH resource is configured in time slot slot#9, slot#19 , Slot#29, slot#39 (slot position filled with dot background in the first row in the figure);
  • the second row shows the slot of the first PRACH resource corresponding to the PRACH configuration index 128 in a system frame
  • the first PRACH resource is configured in the slot slot#9, slot#19, slot#29, slot#39 (the slot position filled by the diagonal line background in the second line in the figure).
  • the time slot configured with the first PRACH resource shown in the second row is offset.
  • the time slot offset is -1, which means that the time slot where the first PRACH resource is located is moved forward by one time slot, that is, in the second row of Figure 2, the time slot slot#9, slot#19, slot#29 , The first PRACH resource on slot#39 is shifted to the slot slot#8, slot#18, slot#28, slot#38 (the slot position filled with the dot background in the second row of FIG. 2).
  • the PRACH resource on the slot slot#8, slot#18, slot#28, slot#38 is the second PRACH resource determined by the IAB node, that is, the PRACH resource actually configured by the upper node for the IAB node.
  • the offset of -1 here means that moving forward one time slot is only an example.
  • the time slot number of the PRACH resource configured by the upper node for the IAB node is actually: 8, 18, 28, 38.
  • slot offset given in the embodiment of the present application is -1 is only exemplary, and the slot offset may also be other integer values, for example, the slot offset is -2.
  • the time slot offset in the embodiment of the present application may exist at the same time as the indication of the system frame, or it may be an IAB node
  • the position of the second PRACH resource may be jointly determined according to the system frame offset and the slot offset indication.
  • the system frame configured with the first PRACH resource may be offset according to the system frame offset indication, and then the time slot configured with the first PRACH resource may be performed according to the time slot offset within the offset system frame
  • the offset, or the offset of the time slot first, and then the offset of the system frame are not limited in the embodiments of the present application.
  • the superior node may determine the PRACH resource of the link between itself and the IAB node (ie, the second PRACH resource) , Receiving the time slot offset indication sent by the host base station or the core network device, or receiving the access link PRACH resource configuration of the lower-level IAB node.
  • the method for the upper node to determine the resource location (ie, the second PRACH resource) for receiving the random access request sent by the IAB node may be the same as the method for the IAB node to determine the second PRACH resource.
  • the first PRACH resource and the third PRACH resource completely overlap in the time domain, so the IAB node can offset all time slots configured with the first PRACH resource according to the time slot offset
  • the IAB node may offset all time slots configured with the first PRACH resource according to the time slot offset
  • the PRACH configuration index and other configuration information corresponding to the communication resource are shown in Table 3.
  • the position adjustment information includes a time slot offset, which is only valid for the time slot where the first PRACH resource conflicts with the third PRACH resource.
  • the time slot offset The amount is still assumed to be -1.
  • the exemplary PRACH configuration indexes are 0 and 1 and their corresponding PRACH configuration information.
  • the embodiment of the present application makes the following assumptions: the PRACH configuration index broadcast by the first network device to the UE is 0, and the first network device receives the PRACH configuration index sent by the upper node or the host base station as 1. That is, PRACH configuration index 1 corresponds to the configuration information of the first PRACH resource, and PRACH configuration index 0 corresponds to the configuration information of the third PRACH resource; the first PRACH resource is configured by the second network device for the first network device The initial PRACH resource and the third PRACH resource are PRACH resources configured by the first network device for the UE or its child nodes.
  • the first network device may receive the random access request sent by the UE or its child nodes on the third PRACH resource.
  • the first network device is an IAB node as an example for description
  • the second network device may be a superior node or a home base station of the IAB node.
  • steps 1 to 3 are similar to steps 1 to 3 in the embodiment shown in FIG. 5, except that in step 3 of the embodiment shown in FIG. 6,
  • the IAB node determines the time domain position of the second PRACH resource, only the conflicting time slots are offset, which will be described in detail in conjunction with Table 3 and FIG. 6 below.
  • the time slot offset is only valid for the time slot where the first PRACH resource and the third PRACH resource conflict, so the IAB node needs to obtain the conflicting time slot.
  • the IAB node may receive the information of the conflicting slot sent by the superior node or the host base station, such as the index of the conflicting slot number.
  • the information of the conflicting time slot may be sent to the IAB node together with the time slot offset, or may be sent to the IAB node separately from the time slot offset.
  • the IAB node can determine the information of the conflicting time slot by itself. For example, the IAB node can determine the configuration information of the third PRACH resource according to the broadcasted third PRACH resource configuration index, which also determines the slot position where the third PRACH resource exists, and the IAB node based on the first PRACH resource sent by the superior node Configuration information of the first PRACH resource, the time slot position where the first PRACH resource is configured may be determined, and then a conflicting time slot of the first PRACH resource and the third PRACH resource may be determined.
  • the embodiments of the present application describe the technical solutions of the embodiments of the present application by taking an example in which the IAB node determines conflicting time slots by itself.
  • Table 3 and FIG. 6 show the slot positions of the third PRACH resource. According to the parameters in the fourth column of Table 3, two PRACH resources (ie, the first PRACH resource and the third PRACH resource) are in the slot# 19. There is a conflict (or overlap) on #39. As shown in FIG. 6, on a system frame, the positions of the first PRACH resource and the third PRACH resource in the time slot are as shown in the figure.
  • the first row shows the position of the third PRACH resource corresponding to PRACH configuration index 0 in a time slot within a system frame, where the third PRACH resource is configured in time slot slot#4, slot#9 , Slot#14, slot#19, slot#24, slot#29, slot#34, slot#39 (the slot position filled with the dot background in the first row in Figure 6);
  • the second row shows PRACH The position of the first PRACH resource corresponding to the configuration index 1 on the time slot in a system frame, where the first PRACH resource is configured in the time slot slot#3, slot#7, slot#11, slot#15, slot#23, slot#27, slot#31, slot#35 (the slot position filled with the dotted background in the second row in Figure 6), and slot#19, slot#39 (slot filled with the background with a diagonal line in the second row in Figure 6) position).
  • the first PRACH resource and the third PRACH resource conflict on slot#19 and slot#39.
  • the conflicting slot configured with the first PRACH resource shown in the second row is offset.
  • the time slot offset is -1, which means that the time slot where the first PRACH resource is located is moved forward by one time slot, that is, in the second row of Figure 2, the first slot on slot #19, slot #39
  • the PRACH resource is shifted to the time slot slot#18, slot#38 (the time slot position filled with the dot background in the second row of FIG. 2).
  • the second PRACH resource includes the resource after the first PRACH resource is offset and the first PRACH resource without offset.
  • slot#3, slot#7, slot#11, slot#15, slot#18, slot#23, slot#27, slot#31, slot#35, slot#38 (second line in Figure 6 All PRACH resources on the time slot positions filled by the dot background are the second PRACH resources determined by the IAB node, that is, the PRACH resources actually configured by the upper node for the IAB node.
  • the time slot number of the PRACH resource configured by the upper node for the IAB node is actually: 3, 7, 11, 15, 18, 23, 27, 31, 35, 38.
  • slot offset given in the embodiment of the present application is -1 is only exemplary, and the slot offset may also be other integer values, for example, the slot offset is -2.
  • -1 indicates that moving forward one time slot is also exemplary, and may also indicate moving backward, specifically whether moving forward or backward is not limited in this application.
  • the time slot offset in the embodiment of the present application may exist at the same time as the indication of the system frame, or it may be an IAB node
  • the position of the second PRACH resource may be jointly determined according to the system frame offset and the slot offset indication. For example, if the PRACH resources of the two links collide on each system frame, the position of the second PRACH resource can be determined according to the slot offset; if the PRACH resources of the two links collide on some system frames, Then, the offset may be based on the system frame offset only, or the system frame offset and the slot offset, or only the slot offset.
  • the superior node may determine the PRACH resource of the link between itself and the IAB node (ie, the second PRACH resource) , Receiving the slot offset indication sent by the host base station, and conflicting slot information or configuration information of the third PRACH resource.
  • the method for the upper node to determine the resource location (ie, the second PRACH resource) for receiving the random access request sent by the IAB node may be the same as the method for the IAB node to determine the second PRACH resource.
  • the superior node may not send the slot offset information, but only indicate which time slots or first PRACH resources on the system frame of the IAB node are unavailable.
  • the host base station or the superior node instructs the IAB node to use the PRACH resource corresponding to the PRACH configuration index 1
  • it also indicates that the PRACH resource on the time slot #19 and time slot #39 of the IAB node is not available, and the IAB node can The first PRACH resource on other time slots than time slot #19 and time slot #39 is used.
  • the situation in which the upper node indicates that the system frame is unavailable is similar, and no more examples are given here.
  • the conflict time slot is not used for the PRACH resource of the first network device on the backhaul link, and can also be defined by the protocol without explicit notification through the protocol.
  • the IAB node when the IAB node receives the random access request sent by the UE or its child nodes in the third PRACH resource, it does not occur that the random access request is sent to the upper node or the host station.
  • the IAB node does not overlap the time slot for receiving the random access request and the time slot for sending the random access request, so that the IAB node can avoid resource conflicts on the time slot with PRACH resources, and thus satisfy the IAB node Half-duplex constraints.
  • the first PRACH resource and the third PRACH resource do not conflict in the time domain at the slot level, and the first PRACH resource and the third PRACH resource can also be located in the time domain at the symbol level. There is no conflict.
  • the following uses Table 4 and Figure 7 as examples to describe in detail.
  • FIG. 7 is a schematic diagram of communication resources according to another embodiment of the present application.
  • the access link and the return link assume the same waveform parameters, such as subcarrier spacing.
  • the PRACH configuration index and other configuration information corresponding to the communication resource are shown in Table 4.
  • the position adjustment information includes the symbol offset.
  • the exemplary PRACH configuration indexes are 78 and 102 and their corresponding PRACH configuration information.
  • the embodiment of the present application makes the following assumption: the PRACH configuration index broadcast by the first network device to the UE is 78 , The first network device receives the PRACH configuration index sent by the upper node or the host base station as 102. That is, the PRACH configuration index 102 corresponds to the configuration information of the first PRACH resource, and the PRACH configuration index 78 corresponds to the configuration information of the third PRACH resource; the first PRACH resource is configured by the second network device for the first network device The initial PRACH resource and the third PRACH resource are PRACH resources configured by the first network device for the UE or its child nodes.
  • the first network device may receive the random access request sent by the UE or its child nodes on the third PRACH resource.
  • the first network device is an IAB node as an example for description
  • the second network device may be a superior node or a home base station of the IAB node.
  • Step 1 The IAB node can obtain the configuration information of the first PRACH resource by receiving the system message broadcast by the superior node, or receiving the RRC configuration sent by the superior node or the host base station. Specifically, the MT function of the IAB node receives the above configuration.
  • Step 2 The IAB node receives the symbol offset sent by the superior node or the host base station.
  • the symbol offset is -8.
  • the symbol offset can be sent by the superior node or the home base station; when the second network device is the home base station, that is, the super node of the IAB node Is the home base station, and the symbol offset is sent by the home base station.
  • the time slot offset may be determined by the donor base station, and then the donor base station notifies the superior node or IAB node of the IAB node.
  • Step 3 According to the received configuration information of the first PRACH resource, the IAB node determines the slot number configured with the PRACH resource indicated by the configuration information of the first PRACH resource. The IAB node determines the time domain position of the PRACH resource (that is, the second PRACH resource) actually configured by the upper node or the host base station according to the symbol offset received in step two.
  • the IAB node may offset all resources of the first PRACH resource. At this time, in this step, the IAB node may not acquire the time slot or symbol where the third PRACH resource is located.
  • the symbol positions of the third PRACH resources are shown in Table 4 and FIG. 7, but it should be understood that the symbol positions of the third PRACH resources are determined in this embodiment The steps are optional.
  • the two PRACH resources (ie, the first PRACH resource and the third PRACH resource) all overlap on the time slots #23, #27, #31, #35, #39; further, according to the parameters in the fifth to eighth columns,
  • the first PRACH resource occupies symbol #8 to symbol #13, a total of 6 symbols, that is, occupies 3 consecutive PRACH opportunities
  • the third PRACH resource occupies symbol #7 to symbol #12 , A total of 6 symbols, also occupy 3 consecutive PRACH opportunities.
  • the positions of the first PRACH resource and the third PRACH resource on the symbol are as shown.
  • the first row or the second row shows the position of the first PRACH resource corresponding to the PRACH configuration index 102 on a symbol in an overlapping time slot, where the first PRACH resource is configured from symbol #8 to symbol #13 (the symbol position filled with the dot background in the first row or the second row on the left in FIG. 7); the third row or the fourth row shows that the third PRACH resource corresponding to the PRACH configuration index 78 is overlapped
  • the first row in FIG. 7 shows the position of the PRACH resource configured for the IAB node by the DU function in the superior node on the symbol
  • the second row shows the PRACH received by the MT function in the IAB node.
  • the PRACH resource used by the superior node to receive the random access request is the same as the PRACH resource used by the IAB node to send the random access request to the superior node. They are the first corresponding to the PRACH configuration index 102 in Table 4.
  • the third row in FIG. 7 shows the position of the PRACH resource configured by the DU function in the IAB node for the UE on the symbol
  • the fourth row shows the PRACH resource received by the UE on the symbol.
  • the PRACH resource used by the IAB node to receive the random access request sent by the UE is the same as the PRACH resource used by the UE to send the random access request to the IAB node, and is the third PRACH resource corresponding to the PRACH configuration index 78 in Table 4.
  • the following only uses the position of the first PRACH resource configured by the upper node to receive the first PRACH resource configured by the IAB node and the third PRACH resource configured by the DU function of the IAB node for the UE as an example for description.
  • the symbols configured with the first PRACH resource shown in the second row are offset.
  • the symbol offset is -8, which means that the symbol where the first PRACH resource is located is moved forward by 8 symbols, that is, in the second line on the right side in FIG. 7, symbol #8 to symbol #13 (the second The first PRACH resource on the line-slashed background fill time slot position) is correspondingly shifted to symbols #0 to symbol #5 (the time slot position of the second line dot background fill on the right side of FIG. 7).
  • the PRACH resources on symbol #0 to symbol #5 are the second PRACH resources determined by the IAB node, that is, the PRACH resources actually configured by the upper node for the IAB node.
  • the symbol start number of the PRACH resource configured by the upper node for the IAB node is actually: 0.
  • the first PRACH resource and the third PRACH resource both conflict on the time slot, so the symbols of the first PRACH resource in all time slots can be offset.
  • the symbol offset may only be valid for the time slot where the PRACH resource conflicts.
  • the symbol of the first PRACH resource in the conflicting time slot may be offset according to the symbol offset, and the first PRACH resource in the non-conflicting time slot may not be offset, then the second PRACH resource includes the first The PRACH resource offset resource and the first PRACH resource without offset.
  • the conflict time slot can be indicated by the superior node, or can be determined by the IAB itself.
  • the position adjustment information may include the offset of the starting symbol index of the PRACH timing.
  • the entire PRACH timing can be shifted according to the offset of the starting symbol index of the PRACH timing without separately shifting each conflicting symbol.
  • the symbol where the first PRACH resource is located moves out of the current time slot.
  • the symbol moved out of the current time slot or the PRACH timing may be regarded as invalid.
  • the first row shows the symbol position where the PRACH resource is before the shift, occupying symbol #8 to symbol #13, if the symbol offset is 2, then the symbol #
  • the PRACH resources on 8 to symbol #13 are offset to symbols #10 to symbol #13 of the current slot, and symbols #0 and symbol #1 of the next slot, in this case, the offset can be
  • the PRACH resources on symbol #0 and symbol #1 of the next time slot are considered invalid, and the number of opportunities for PRACH resources in the current time slot is changed from 3 to 2.
  • the first PRACH resource of the symbol is offset so that the first PRACH resource and the third PRACH resource do not conflict in the time domain position.
  • the effect of the method of symbol offset in a time slot is limited.
  • the long format preamble can occupy up to 6 symbols. If there are two long format random access opportunities in a slot, 12 symbols out of 14 symbols will be occupied.
  • the The embodiment of the application can also instruct the IAB node to use PRACH resources on valid symbols so that the first PRACH resource and the third PRACH resource do not conflict in the time domain. The following describes in detail in conjunction with Table 5 and FIG. 9.
  • the exemplary PRACH configuration indexes are 166 and 167 and their corresponding PRACH configuration information.
  • the embodiments of the present application make the following assumptions: the access link and the return link of the first network device The channel uses the same waveform parameters, such as the subcarrier interval; the PRACH configuration index broadcast to the UE by the first network device is 166, and the PRACH configuration index sent by the first network device to the upper node or the host base station is 167.
  • the PRACH configuration index 167 corresponds to the configuration information of the first PRACH resource
  • the PRACH configuration index 166 corresponds to the configuration information of the third PRACH resource
  • the first PRACH resource is configured by the second network device for the first network device
  • the initial PRACH resource and the third PRACH resource are PRACH resources configured by the first network device for the UE or its child nodes.
  • the first network device may receive the random access request sent by the UE or its child nodes on the third PRACH resource.
  • the first network device is an IAB node as an example for description
  • the second network device may be a superior node or a home base station of the IAB node.
  • Step 1 The IAB node can obtain the configuration information of the first PRACH resource by receiving the system message broadcast by the superior node, or receiving the RRC configuration sent by the superior node or the host base station. Specifically, the MT function of the IAB node receives the above configuration.
  • Step 2 The IAB node receives the symbol index configured by the superior node or the host base station.
  • the symbol index is used to instruct the IAB node to use PRACH resources only when the symbol index indicates a valid PRACH.
  • the symbol index is (1,2,3), it indicates a valid PRACH opportunity within a time slot.
  • the symbol positions of the third PRACH resource are shown in Table 5 and FIG. 8, but it should be understood that the determination of the symbol position of the third PRACH resource is in this embodiment This is a non-essential step.
  • the two PRACH resources (ie, the first PRACH resource and the third PRACH resource) all overlap on time slots #4, #9, #14, #19, #24, #29, #34, #39; further, according to the fifth
  • the parameters listed in the eighth to eighth columns show that in any of the overlapping time slots, the first PRACH resource occupies symbol #0 to symbol #13, a total of 14 symbols, that is, 7 consecutive PRACH opportunities, and the third PRACH The resource occupation symbol #8 to symbol #13, a total of 6 symbols, also occupy 3 consecutive PRACH opportunities.
  • the positions of the first PRACH resource and the third PRACH resource on the symbol are as shown.
  • the first row shows the position of the first PRACH resource corresponding to the PRACH configuration index 167 on a symbol in an overlapping time slot, where the first PRACH resource is configured from symbol #0 to symbol #13;
  • the second row shows the position of the third PRACH resource corresponding to the PRACH configuration index 166 on a symbol in an overlapping time slot, where the third PRACH resource is configured from symbol #8 to symbol #13 (the second row of circles in FIG. 9 Dotted background filled symbol position), it can be seen that the first PRACH resource and the third PRACH resource conflict on symbol #8 to symbol #13.
  • the effective PRACH timing indicated by the symbol index is (1, 2, 3), and the IAB node can use only the first three PRACH timings shown in the first row of FIG. 9 for mapping, namely RO91, RO92, and RO93, without overlapping Symbol #6 to symbol #13 in the time slot.
  • the PRACH resources on symbol #0 to symbol #5 are the second PRACH resources determined by the IAB node, that is, the PRACH resources actually configured by the upper node for the IAB node.
  • symbol index indication (1, 2, 3) given in the embodiment of the present application is merely exemplary, and the symbol index may also be other numerical values, such as (2, 3) or (5).
  • (1, 2, 3) indicated by the symbol index in the embodiment of the present application means that the first 3 PRACH opportunities in a slot are valid, and if the symbol index indicates (5), it indicates the first 5 PRACH timings are valid.
  • the symbol index may also indicate a PRACH timing that fails in a time slot, and the IAB node may use other symbols than the PRACH timing indicated by the symbol index.
  • both the first PRACH resource and the third PRACH resource conflict on time slots, so the valid PRACH timing indicated by the symbol index can be applied to all time slots.
  • the symbol index may only be valid for the time slot where the PRACH resource conflicts.
  • the IAB node may use the effective PRACH timing in the conflicting time slot, and may also use the first PRACH resource in the non-conflicting time slot.
  • the second PRACH resource includes the effective first PRACH resource in the conflicting time slot and other The first PRACH resource in the conflicting time slot.
  • the conflict time slot can be indicated by the superior node, or can be determined by the IAB itself.
  • the symbol index may indicate a valid symbol or a failed symbol or an available symbol index or an unavailable symbol index, rather than a PRACH timing.
  • the specific implementation and symbol index indicate the validity or invalid PRACH timing. The method is the same and will not be repeated here.
  • the position adjustment information may also indicate which time slots of the time slots configured with the first PRACH resource are valid, then the IAB node may only use the first PRACH resource on the effective time slot.
  • the position adjustment information includes an offset type indication.
  • the offset type indication is used to indicate whether the offset indicates a slot offset or a symbol offset. For the different offset methods in the foregoing embodiments, it is necessary to make the first node know whether to perform offset based on time slot offset or symbol to ensure consistency of PRACH resource configuration.
  • the PRACH resource symbol index instructs the IAB node to use valid PRACH resources.
  • the first PRACH resource does not conflict with the third PRACH resource, so that the IAB node receives random
  • the symbol of the access request does not overlap with the symbol of sending the random access request, so that the IAB node can avoid resource conflicts on the symbols with PRACH resources, thereby meeting the half-duplex constraint of the IAB node.
  • the communication apparatus 1000 in FIG. 10 may be the first network device mentioned above, and may be a specific example of the relay station 120 in FIG. 1 or FIG. 2, such as an IAB sub-node.
  • the apparatus shown in FIG. 10 may be used to implement the above method performed by the first network device.
  • the communication apparatus 1000 may be used to execute the method of FIG. 4, and may specifically implement the methods shown in FIGS. 5 to 9. In the embodiment, to avoid redundancy, the description will not be repeated.
  • the communication device 1000 shown in FIG. 10 includes a transceiving unit 1010 and a processing unit 1020.
  • the transceiver unit 1010 is configured to receive configuration information of the first physical random access channel PRACH resource.
  • the transceiver unit 1010 is further configured to receive position adjustment information, where the position adjustment information is used to indicate that the position of at least a part of the PRACH resources in the first PRACH resource is adjusted on a time slot or a symbol.
  • the processing unit 1020 is configured to determine the second PRACH resource according to the configuration information of the first PRACH resource and the position adjustment information.
  • the transceiver unit 1010 is further configured to send a random access request to the second network device on the second PRACH resource.
  • the position adjustment information includes a time slot or symbol offset
  • the processing unit 1020 is specifically configured to shift at least a part of the PRACH resources in the first PRACH resource according to the time slot or symbol offset Offset by the amount to obtain the second PRACH resource.
  • the second PRACH resource is obtained after all the resources in the first PRACH resource are offset according to the offset of the time slot or symbol.
  • the position adjustment information further includes position information of a target time slot or symbol
  • the processing unit 1020 is specifically configured to offset PRACH resources on the target time slot or symbol to obtain the second PRACH Resources, the second PRACH resource includes the resource after the first PRACH resource is offset and the first PRACH resource without offset.
  • the processing unit 1020 is specifically configured to determine a target time slot or symbol in which the first PRACH resource and the third PRACH resource conflict in the time domain, and the third PRACH resource is used for the first network device Receiving a random access request; the processing unit 1020 is specifically configured to offset the PRACH resource in the target time slot or symbol to obtain the second PRACH resource, where the second PRACH resource includes the first PRACH resource offset The shifted resource and the first PRACH resource without offset.
  • the position adjustment information includes a time slot and/or symbol index, and the time slot and/or symbol index is used to indicate that at least a part of the first PRACH resources are valid, and the processing unit 1020 specifically It is used to determine that at least a part of the first PRACH resources indicated by the time slot or symbol index is the second PRACH resource.
  • the configuration information of the first PRACH resource is carried in a system broadcast message or a radio resource control configuration message.
  • the communication apparatus 1100 shown in FIG. 11 may correspond to the first network device described above.
  • the communication device 1100 includes a processor 1102.
  • the processor 1102 is used to control and manage the actions of the first network device.
  • the processor 1102 is used to support the first network device to execute the operations shown in FIG. 5 to FIG. 9 in the foregoing embodiment. Method or operation or function, and for supporting receiving the position adjustment information in the foregoing embodiment, and determining the second PRACH resource according to the position adjustment information.
  • the first network device may further include: a memory 1101 and a communication interface 1103; the processor 1102, the communication interface 1103, and the memory 1101 may be connected to each other or via a bus 1104.
  • the communication interface 1103 is used to support the first network device to communicate, and the memory 1101 is used to store the program code and data of the first network device.
  • the processor 1102 calls the code stored in the memory 1101 for control and management.
  • the memory 1101 may or may not be coupled with the processor.
  • the processor 1102 may be a central processor unit, a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array 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 the present application.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a digital signal processor and a microprocessor, and so on.
  • the bus 1104 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, or the like.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the communication apparatus 1200 in FIG. 12 may be the second network device mentioned above, and may be a specific example of the host base station 110 in FIG. 1 or FIG. 2.
  • the apparatus shown in FIG. 12 may be used to implement the above method performed by the second network device.
  • the communication apparatus 1200 may be used to execute the method of FIG. 4, and may specifically implement the methods shown in FIGS. 5 to 9. In the embodiment, to avoid redundancy, the description will not be repeated.
  • the communication device 1200 shown in FIG. 12 includes a transceiver unit 1210 and a processing unit 1220.
  • the processing unit 1220 is configured to acquire position adjustment information, which is used to indicate that the position of at least a part of PRACH resources in the first physical random access channel PRACH resource is adjusted on a time slot or a symbol.
  • the transceiver unit 1210 is configured to send the position adjustment information to the first network device.
  • the communication device is a host base station.
  • the processing unit 1220 is specifically configured to determine the position adjustment information and/or the second PRACH resource according to the configuration information of the first PRACH resource and the configuration information of the third PRACH resource, and the third PRACH resource
  • the first network device is used to receive a random access request
  • the second PRACH resource is used to receive a random access request sent by the first network device.
  • the position adjustment information includes at least one of the following information: a slot offset, a symbol offset, a slot index, or a symbol index.
  • the transceiving unit 1210 is configured to send configuration information of the third PRACH resource to the first network device.
  • the transceiving unit 1210 is configured to send configuration information of the third PRACH resource to an upper node of the first network device.
  • the transceiver unit 1210 is configured to send the location adjustment information to the first network device.
  • the transceiving unit 1210 may also be used to send the location adjustment information to an upper node of the first network device.
  • the transceiver unit 1210 is specifically configured to send the location adjustment information to the first network device through an F1AP interface or a radio resource control RRC message or a medium access control element MAC.
  • the communication apparatus 1300 shown in FIG. 13 may correspond to the second network device described above as a host base station.
  • the communication device 1300 includes: a processor 1302.
  • the processor 1302 is used to control and manage the actions of the second network device.
  • the processor 1302 is used to support the second network device to execute the operations shown in FIG. 5 to FIG. 9 in the foregoing embodiment.
  • the method or operation or function, and for supporting the second network device in the foregoing embodiment to obtain location adjustment information or determine the second PRACH resource.
  • the second network device may further include: a memory 1301 and a communication interface 1303; the processor 1302, the communication interface 1303, and the memory 1301 may be connected to each other or via a bus 1304.
  • the communication interface 1303 is used to support the second network device to communicate, and the memory 1301 is used to store the program code and data of the second network device.
  • the processor 1302 calls the code stored in the memory 1301 to perform control and management.
  • the memory 1301 may be coupled with the processor or not.
  • the processor 1302 may be a central processor unit, a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array 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 the present application.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a digital signal processor and a microprocessor, and so on.
  • the bus 1304 may be a peripheral component interconnection standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus, or the like.
  • PCI peripheral component interconnection standard
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, a data bus, and a control bus. For ease of representation, only a thick line is used in FIG. 13, but it does not mean that there is only one bus or one type of bus
  • the communication apparatus 1400 in FIG. 14 may be the second network device mentioned above, and may be a specific example of a superior node of the first network device, for example, another IAB node.
  • the apparatus shown in FIG. 14 may be used to implement the above method performed by the second network device.
  • the communication apparatus 1400 may be used to execute the method of FIG. 4, and may specifically implement the methods shown in FIGS. 5 to 9. In the embodiment, to avoid redundancy, the description will not be repeated.
  • the communication device 1400 shown in FIG. 14 includes a transceiver unit 1410 and a processing unit 1420.
  • the processing unit 1420 is configured to acquire position adjustment information, which is used to indicate that the position of at least a part of PRACH resources in the first physical random access channel PRACH resource is adjusted on a time slot or a symbol;
  • the transceiver unit 1410 is configured to send the location adjustment information to the first network device.
  • the communication device is a superior node of the first network device.
  • the processing unit 1420 is specifically configured to determine the position adjustment information according to the configuration information of the first PRACH resource and the configuration information of the third PRACH resource, and the third PRACH resource is used for the first network
  • the device receives a random access request; the transceiving unit 1410 is specifically configured to send the location adjustment information to the first network device through a host base station, or the transceiving unit 1410 is specifically configured to send directly to the first network device The position adjustment information.
  • the transceiver unit 1410 is further configured to receive configuration information of the third PRACH resource sent by a host base station or the first network device.
  • the transceiver unit 1410 is specifically configured to receive the location adjustment information sent by the host base station or the core network device.
  • the transceiving unit 1410 is specifically configured to forward the location adjustment information sent by the host base station or the core network device through the air interface, or the transceiving unit 1410 is specifically used to send the location adjustment information to the first network device through the air interface Position adjustment information.
  • the position adjustment information includes at least one of the following information: a slot offset, a symbol offset, a slot index, or a symbol index.
  • the processing unit 1420 is further configured to determine a second PRACH resource according to the configuration information of the first PRACH resource and the position adjustment information, and the second PRACH resource is used to receive the transmission from the first network device. Random access request.
  • the position adjustment information includes a time slot or symbol offset
  • the processing unit 1420 is specifically configured to shift at least a part of the PRACH resources in the first PRACH resource according to the time slot or symbol offset Offset by the amount to obtain the second PRACH resource.
  • the position adjustment information further includes position information of a target time slot or symbol
  • the processing unit 1420 is specifically configured to offset PRACH resources on the target time slot or symbol to obtain the second PRACH Resources, the second PRACH resource includes the resource after the first PRACH resource is offset and the first PRACH resource without offset.
  • the processing unit 1420 is specifically configured to determine a target time slot or symbol in which the first PRACH resource and the third PRACH resource collide in the time domain, and the third PRACH resource is used for the first network device Receiving a random access request; the processing unit 1420 is specifically configured to offset the PRACH resource in the target time slot or symbol to obtain the second PRACH resource, where the second PRACH resource includes the first PRACH resource offset The shifted resource and the first PRACH resource without offset.
  • the position adjustment information includes a time slot and/or symbol index, and the time slot and/or symbol index is used to indicate that at least a part of the first PRACH resources are valid, and the processing unit 1420 specifically It is used to determine that at least a part of the first PRACH resources indicated by the time slot and/or symbol index is the second PRACH resource.
  • the transceiver unit 1410 is specifically configured to send the location adjustment information to the first network device through an F1AP interface or a radio resource control RRC message or a medium access control element MAC.
  • the communication apparatus 1500 shown in FIG. 15 may correspond to that the second network device described above is a superior node of the first network device.
  • the communication device 1500 includes: a processor 1502.
  • the processor 1502 is used to control and manage the operation of the second network device.
  • the processor 1502 is used to support the second network device to execute the operations shown in FIG. 5 to FIG. 9 in the foregoing embodiment.
  • the method or operation or function, and for supporting the second network device in the foregoing embodiment to obtain location adjustment information or determine the second PRACH resource.
  • the second network device may further include: a memory 1501 and a communication interface 1503; the processor 1502, the communication interface 1503, and the memory 1501 may be connected to each other or via a bus 1504.
  • the communication interface 1503 is used to support the second network device to communicate, and the memory 1501 is used to store the program code and data of the second network device.
  • the processor 1502 calls the code stored in the memory 1501 to perform control and management.
  • the memory 1501 may or may not be coupled with the processor.
  • the processor 1502 may be a central processor unit, a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array 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 the present application.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a digital signal processor and a microprocessor, and so on.
  • the bus 1504 may be a peripheral component interconnection (PCI) bus or an extended industry standard architecture (EISA) bus or the like.
  • PCI peripheral component interconnection
  • EISA extended industry standard architecture
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical, or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product
  • the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application.
  • the foregoing storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

本申请提供了一种随机接入资源配置方法和装置，该方法包括第一网络设备接收第一物理随机接入信道PRACH资源的配置信息；该第一网络设备接收位置调整信息，该位置调整信息用于指示调整第一PRACH资源中的至少一部分PRACH资源的位置；该第一网络设备根据第一PRACH资源的配置信息和位置调整信息确定第二PRACH资源；该第一网络设备在第二PRACH资源上向第二网络设备发送随机接入请求。上述技术方案中，第一网络设备能够调整所配置的第一PRACH资源，并使用调整后的第二PRACH资源进行随机接入，解决了网络设备在接入链路和回传链路上的随机接入资源冲突时的配置问题。

Description

随机接入资源配置方法和装置
本申请要求于2019年1月11日提交中国专利局、申请号为201910028792.6、申请名称为“随机接入资源配置方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信领域，并且更具体地，涉及一种随机接入资源配置方法和装置。
背景技术
在集成接入回传(integrated access and backhaul，IAB)网络中，接入链路是网络设备为终端提供接入服务的链路，回传链路是网络设备之间相互传输信息与数据的链路。物理随机接入信道(physical random access channel，PRACH)资源的总和对于接入链路和回传链路是固定的。对一个IAB节点来说，由于需要接入上级节点，同时也需要接收IAB节点所服务的终端或下级IAB节点发送的随机接入前导，因此需要在接入链路上配置资源用于接收用户设备(user equipment，UE)发送的随机接入请求，而在回传链路上则需要发送随机接入请求以接入上级节点。而对支持半双工(half duplexing)的IAB节点，可能不能在回传链路上进行随机接入的同时，又接收接入链路上UE发送的随机接入请求。
如何配置IAB节点在接入链路和回传链路上的随机接入资源是一个需要解决的问题。
发明内容
本申请实施例提供一种随机接入资源配置方法和装置，解决了网络设备在接入链路和回传链路上的随机接入资源冲突时的配置问题。
第一方面，提供一种随机接入资源配置方法，该方法包括：第一网络设备接收第一物理随机接入信道PRACH资源的配置信息；所述第一网络设备接收位置调整信息，所述位置调整信息用于指示调整所述第一PRACH资源中的至少一部分PRACH资源的位置；所述第一网络设备根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源；所述第一网络设备在所述第二PRACH资源上向第二网络设备发送随机接入请求。
本申请的技术方案中，第一网络设备能够在例如时隙或符号上调整所配置的第一PRACH资源，并使用调整后的第二PRACH资源进行随机接入，这样，例如在接入链路和回传链路上的随机接入资源冲突时，就能够使得两个链路上的随机接入资源在时间上错开，从而解决了网络设备在接入链路和回传链路上的随机接入资源冲突时的配置问题。
具体地，第一网络设备接收第一PRACH资源的配置信息后，并不是直接用该第一PRACH资源发送随机接入请求，而是根据接收到的位置调整信息将该第一PRACH资源在时隙或符号上进行调整，得到第二PRACH资源，然后在回传链路上使用第二PRACH 资源发送随机接入请求。将第一PRACH资源在时域位置上进行调整，可以使网络设备在回传链路上使用随机接入资源的时间改变，也可以与该网络设备在其他链路上使用的随机接入资源的时间错开，从而解决了网络设备在接入链路和回传链路上的随机接入资源冲突时的配置问题。
应理解，本申请实施例中，第二PRACH资源用于第一网络设备向第二网络设备发送随机接入请求。第一PRACH资源与第一网络设备为终端或第一网络设备的子节点配置的第三PRACH资源在时域上有重叠，第一PRACH资源按照位置调整信息进行调整后得到的第二PRACH资源与第三PRACH资源在时域上不重叠。
还应理解，本申请实施例中，时域上有重叠包括第一PRACH资源和第三PRACH资源在某些时隙或者某些时隙上的某些符号上相同，或者是某些时隙的某些符号所在的时间上相同。
可选地，所述位置调整信息用于指示在时隙或符号上调整所述第一PRACH资源中的至少一部分PRACH资源的位置。
结合第一方面，在一种可能的实现方式中，所述位置调整信息包括时隙或符号的偏移量，所述第一网络设备根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源，包括：
所述第一网络设备将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源。
通过引入时隙级别或符号级别的偏移量，可以将第一PRACH资源在时隙或符号上进行偏移得到第二PRACH资源，从而使第一网络设备在回传链路上使用随机接入资源的时隙或符号与第一网络设备在其他链路上使用随机接入资源的时隙或符号错开，避免在时隙或符号上发生PRACH资源冲突，还可以满足第一网络设备的半双工约束。另外，该方法还可以适用于每个系统帧均配置有PRACH资源的情形，将PRACH资源在系统帧内进行时隙或符号的偏移，可以提高资源利用率。
应理解，当接入链路和回传链路的PRACH使用不同的波形参数时，时隙号并不是相同的，但是接入链路和回传链路的不同时隙所对应的时域资源的位置可能是相同的，也会存在冲突。此时，可以通过将第一PRACH资源中时域上和第三PRACH资源冲突的符号进行偏移，避免冲突。
应理解，所述时隙或符号的偏移量为正数或负数。正数表示向后偏移，负数表示向前偏移；或者正数表示向前偏移，负数表示向后偏移。
结合第一方面，在一种可能的实现方式中，所述第二PRACH资源是所述第一PRACH资源中的全部资源按照所述时隙或符号的偏移量进行偏移之后得到的。
当第一网络设备在回传链路上使用的PRACH资源与在其他链路上使用的PRACH资源在时隙或符号上完全重叠时，位置调整信息可以指示将配置有第一PRACH资源的全部资源在时隙或符号上进行偏移，能够解决第一网络设备在回传与接入链路上的随机接入资源冲突时的配置问题。
结合第一方面，在一种可能的实现方式中，所述位置调整信息还包括目标时隙或符号的位置信息，所述第一网络设备将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源，包括：
将所述目标时隙或符号上的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
结合第一方面，在一种可能的实现方式中，所述目标时隙或符号为第一PRACH资源和第三PRACH资源冲突的时隙或符号，或者配置有第一PRACH资源的全部时隙或符号。
应理解，本申请实施例中的“冲突时隙”或“冲突符号”是指在冲突时隙或冲突符号上，均配置有第一PRACH资源和第三PRACH资源。
结合第一方面，在一种可能的实现方式中，所述目标时隙或符号由第一网络设备的上级节点或宿主基站确定。
结合第一方面，在一种可能的实现方式中，所述第一网络设备将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源，包括：
所述第一网络设备确定所述第一PRACH资源与第三PRACH资源在时域上冲突的目标时隙或符号，所述第三PRACH资源用于所述第一网络设备接收随机接入请求；将所述目标时隙或符号中的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
位置调整信息可以指示将目标时隙或符号上的PRACH资源进行偏移，相当于只偏移一部分时隙或符号上的PRACH资源，当只偏移冲突时隙或冲突符号中的PRACH资源时，则可以不对其他不冲突的时隙或符号产生影响，提高资源利用率。
结合第一方面，在一种可能的实现方式中，所述位置调整信息包括PRACH时机的起始符号索引的偏移量，第一网络设备根据PRACH时机的起始符号索引的偏移量将PRACH时机进行整体偏移，得到第二PRACH资源。
结合第一方面，在一种可能的实现方式中，PRACH时机偏移出当前时隙或偏移至下一个时隙，则移出当前时隙的符号上的PRACH资源则不再有效，偏移后仍在当前时隙的符号上的PRACH资源仍有效。
位置调整信息包括PRACH时机的起始符号索引的偏移量时，可以指示将整个PRACH时机按照偏移量进行偏移，整体进行偏移效率更高。另外将移出当前时隙的PRACH时机视作无效，第一网络设备也就不能使用该PRACH时机的符号上的PRACH时机，可以避免对其他时隙上的资源配置产生影响。
应理解，本申请实施例的“有效”是指第一网络设备可以使用位置调整信息所指示的有效时隙或符号上的PRACH资源；“失效”是指第一网络设备不可以使用位置调整信息所指示的失效时隙或符号上的PRACH资源或在相应的位置不再映射RO，或不使用第一网络设备所指示的有效时隙或符号之外的其他时隙或符号上的PRACH资源。
结合第一方面，在一种可能的实现方式中，所述位置调整信息包括时隙和/或符号索引，所述时隙和/或符号索引用于指示所述第一PRACH资源中的至少一部分PRACH资源有效，所述第一网络设备根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源，包括：
所述第一网络设备确定所述时隙和/或符号索引指示的所述第一PRACH资源中的至少一部分PRACH资源为所述第二PRACH资源。
通过时隙或符号的索引指示第一网络设备可以使用的有效的PRACH资源，解决了第一网络设备的随机接入资源配置问题，同时可以避免对配置有其他资源的其他时隙或符号上的资源配置产生影响。
结合第一方面，在一种可能的实现方式中，所述位置调整信息包括不可用的时隙信息，所述不可用的时隙信息用于指示第一网络设备使用除不可用时隙以外的时隙上的第一PRACH资源，或者指示第一网络设备不可以使用不可用的时隙上的PRACH资源。
结合第一方面，在一种可能的实现方式中，所述位置调整信息包括不可用的系统帧信息，所述所述不可用的系统帧信息用于指示第一网络设备使用除不可用的系统帧以外的系统帧上的第一PRACH资源，或者指示第一网络设备不可以使用不可用的系统帧上的PRACH资源。
结合第一方面，在一种可能的实现方式中，所述位置调整信息包括可用符号索引，所述可用符号索引指示第一网络设备可以使用所述可用符号索引对应的符号上的PRACH资源。
结合第一方面，在一种可能的实现方式中，所述位置调整信息包括冲突时隙中的可用符号索引，所述冲突时隙中的可用符号索引指示第一网络设备可以使用冲突时隙中的可用符号索引对应的符号上的PRACH资源，和冲突时隙之外的其他时隙上的PRACH资源。
结合第一方面，在一种可能的实现方式中，所述位置调整信息还包括冲突时隙索引。
结合第一方面，在一种可能的实现方式中，所述位置调整信息包括不可用符号索引，所述不可用符号索引指示第一网络设备不可以使用所述可用符号索引对应的符号上的PRACH资源，或指示第一网络设备使用除所述不可用符号索引对应的符号外的其他符号上的PRACH资源。
结合第一方面，在一种可能的实现方式中，所述位置调整信息包括冲突时隙中的不可用符号索引，所述冲突时隙中的不可用符号索引指示第一网络设备不可以使用冲突时隙中的不可用符号索引对应的符号上的PRACH资源。
结合第一方面，在一种可能的实现方式中，所述位置调整信息包括可用时隙索引，所述可用时隙索引指示第一网络设备可以使用所述可用时隙索引对应的时隙上的PRACH资源。
结合第一方面，在一种可能的实现方式中，所述位置调整信息包括系统帧的偏移量和时隙的偏移量。
本申请实施例中的技术方案可以将系统帧偏移量、时隙的偏移量和符号的偏移量进行组合选择，可以针对具体的情况选择合适的位置调整信息，也可以使用上述三种信息中的至少两种共同指示第一网络设备，保证了第一网络设备的随机接入资源冲突时的配置问题的解决。
结合第一方面，在一种可能的实现方式中，所述第一PRACH资源的配置信息承载于系统广播消息或无线资源控制配置消息中。
结合第一方面，在一种可能的实现方式中，第一PRACH资源的配置信息初始可以通过系统消息进行配置，而当第一PRACH资源的配置信息发生变化时，采用RRC配置消息进行配置。
结合第一方面，在一种可能的实现方式中，所述第一PRACH资源的配置信息是宿主 基站发送的，或者所述第一PRACH资源的配置信息是第一网络设备的上级节点发送的。
结合第一方面，在一种可能的实现方式中，所述第一PRACH资源的配置信息可以是PRACH配置索引。
结合第一方面，在一种可能的实现方式中，所述位置调整信息由第一网络设备的上级节点或宿主基站发送给第一网络设备的。
结合第一方面，在一种可能的实现方式中，所述位置调整信息由宿主基站或第一网络设备的上级节点或核心网设备确定。
结合第一方面，在一种可能的实现方式中，该第一网络设备可以为IAB节点，第二网络设备可以为宿主基站或第一网络设备的上级节点。
结合第一方面，在一种可能的实现方式中，该第一网络设备可以支持半双工通信，也可以支持全双工通信。
第二方面，提供一种随机接入资源配置方法，该方法包括：第二网络设备获取位置调整信息，所述位置调整信息用于指示调整第一物理随机接入信道PRACH资源中的至少一部分PRACH资源的位置；所述第二网络设备向第一网络设备发送所述位置调整信息。
根据位置调整信息将第一PRACH资源例如在时隙或符号上进行调整，改变了第一PRACH资源在例如时隙或符号上的位置，也就改变了使用该调整后的第一PRACH资源的第一网络设备的随机接入资源的配置，从而解决了第一网络设备使用的随机接入资源冲突的问题。
可选地，所述位置调整信息用于指示在时隙或符号上调整所述第一PRACH资源中的至少一部分PRACH资源的位置。
结合第二方面，在一种可能的实现方式中，所述第二网络设备为宿主基站，所述第二网络设备获取位置调整信息，包括：所述第二网络设备根据所述第一PRACH资源的配置信息和第三PRACH资源的配置信息确定所述位置调整信息和/或第二PRACH资源，所述第三PRACH资源用于所述第一网络设备接收随机接入请求，所述第二PRACH资源用于接收所述第一网络设备发送的随机接入请求。
结合第二方面，在一种可能的实现方式中，所述第二网络设备为所述第一网络设备的上级节点，所述第二网络设备获取位置调整信息，包括：
所述第二网络设备根据所述第一PRACH资源的配置信息和第三PRACH资源的配置信息确定所述位置调整信息，所述第三PRACH资源用于所述第一网络设备接收随机接入请求；
所述第二网络设备向第一网络设备发送所述位置调整信息，包括：
所述第二网络设备通过宿主基站向所述第一网络设备发送所述位置调整信息，或者所述第二网络设备直接向所述第一网络设备发送所述位置调整信息。
结合第二方面，在一种可能的实现方式中，还包括：所述第二网络设备接收宿主基站或所述第一网络设备发送的所述第三PRACH资源的配置信息。
结合第二方面，在一种可能的实现方式中，所述第二网络设备为所述第一网络设备的上级节点，所述第二网络设备获取位置调整信息，包括：
所述第二网络设备接收宿主基站或核心网设备发送的所述位置调整信息。
结合第二方面，在一种可能的实现方式中，所述第二网络设备向第一网络设备发送位 置调整信息，包括：所述第二网络设备通过空口转发宿主基站或核心网设备发送的所述位置调整信息，或者所述第二网络设备通过空口向所述第一网络设备发送所述位置调整信息。
结合第二方面，在一种可能的实现方式中，所述位置调整信息包括以下信息中的至少一种：时隙的偏移量，符号的偏移量，时隙索引或符号索引。
结合第二方面，在一种可能的实现方式中，还包括：所述第二网络设备根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源，所述第二PRACH资源用于接收所述第一网络设备发送的随机接入请求。
结合第二方面，在一种可能的实现方式中，所述位置调整信息包括时隙或符号的偏移量，所述第二网络设备根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源，包括：
所述第二网络设备将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源。
通过引入时隙级别或符号级别的偏移量，可以将第一PRACH资源在时隙或符号上进行偏移得到第二PRACH资源，从而使第二网络设备确定在回传链路上使用随机接入资源的时隙或符号与第一网络设备在其他链路上使用随机接入资源的时隙或符号错开，避免在时隙或符号上发生PRACH资源冲突。另外，该方法还可以适用于每个系统帧均配置有PRACH资源的情形，将PRACH资源在系统帧内进行时隙或符号的偏移，可以提高资源利用率。
应理解，当接入链路和回传链路的PRACH使用不同的波形参数时，时隙号并不是相同的，但是接入链路和回传链路的不同时隙所对应的时域资源的位置可能是相同的，也会存在冲突。此时，可以通过将第一PRACH资源中时域上和第三PRACH资源冲突的符号进行偏移，避免冲突。
应理解，所述时隙或符号的偏移量为正数或负数。正数表示向后偏移，负数表示向前偏移；或者正数表示向前偏移，负数表示向后偏移。
结合第二方面，在一种可能的实现方式中，所述位置调整信息还包括目标时隙或符号的位置信息，所述第二网络设备将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源，包括：
将所述目标时隙或符号上的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
结合第二方面，在一种可能的实现方式中，所述目标时隙或符号为第一PRACH资源和第三PRACH资源冲突的时隙或符号。
应理解，本申请实施例中的“冲突时隙”或“冲突符号”是指在冲突时隙或冲突符号上，均配置有第一PRACH资源和第三PRACH资源。
位置调整信息可以指示将目标时隙或符号上的PRACH资源进行偏移，相当于只偏移一部分时隙或符号上的PRACH资源，当只偏移冲突时隙或冲突符号中的PRACH资源时，则可以不对其他不冲突的时隙或符号产生影响，提高资源利用率。
结合第二方面，在一种可能的实现方式中，所述目标时隙或符号由第二网络设备或宿 主基站确定。
结合第二方面，在一种可能的实现方式中，所述第二网络设备将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源，包括：
所述第二网络设备确定所述第一PRACH资源与第三PRACH资源在时域上冲突的目标时隙或符号，所述第三PRACH资源用于所述第一网络设备接收随机接入请求；
将所述目标时隙或符号中的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
结合第二方面，在一种可能的实现方式中，所述位置调整信息包括PRACH时机的起始符号索引的偏移量，第二网络设备根据PRACH时机的起始符号索引的偏移量将PRACH时机进行整体偏移，得到第二PRACH资源。
结合第二方面，在一种可能的实现方式中，PRACH时机偏移出当前时隙或偏移至下一个时隙，则移出当前时隙的符号上的PRACH资源则不再有效，偏移后仍在当前时隙的符号上的PRACH资源仍有效。
位置调整信息包括PRACH时机的起始符号索引的偏移量时，可以指示将整个PRACH时机按照偏移量进行偏移，整体进行偏移效率高。另外将移出当前时隙的PRACH时机视作无效，第二网络设备也就不能使用该PRACH时机的符号上的PRACH时机，可以避免对其他时隙上的资源配置产生影响。
应理解，本申请实施例的“有效”是指第二网络设备可以使用位置调整信息所指示的有效时隙或符号上的PRACH资源；“失效”是指第二网络设备不可以使用位置调整信息所指示的失效时隙或符号上的PRACH资源或在相应的位置不再映射RO，或不使用第二网络设备所指示的有效时隙或符号之外的其他时隙或符号上的PRACH资源。
结合第二方面，在一种可能的实现方式中，所述位置调整信息包括时隙和/或符号索引，所述时隙和/或符号索引用于指示所述第一PRACH资源中的至少一部分PRACH资源有效，所述第二网络设备根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源，包括：
所述第二网络设备确定所述时隙和/或符号索引指示的所述第一PRACH资源中的至少一部分PRACH资源为所述第二PRACH资源。
通过时隙或符号的索引指示第二网络设备可以使用的有效的PRACH资源，可以避免对配置有其他资源的其他时隙或符号上的资源配置产生影响。
结合第二方面，在一种可能的实现方式中，所述位置调整信息包括不可用的时隙信息，所述不可用的时隙信息用于指示第二网络设备使用除不可用时隙以外的时隙上的第一PRACH资源，或者指示第二网络设备不可以使用不可用的时隙上的PRACH资源。
结合第二方面，在一种可能的实现方式中，所述位置调整信息包括不可用的系统帧信息，所述所述不可用的系统帧信息用于指示第二网络设备使用除不可用的系统帧以外的系统帧上的第一PRACH资源，或者指示第二网络设备不可以使用不可用的系统帧上的PRACH资源。
结合第二方面，在一种可能的实现方式中，所述位置调整信息包括可用符号索引，所 述可用符号索引指示第二网络设备可以使用所述可用符号索引对应的符号上的PRACH资源。
结合第二方面，在一种可能的实现方式中，所述位置调整信息包括冲突时隙中的可用符号索引，所述冲突时隙中的可用符号索引指示第二网络设备可以使用冲突时隙中的可用符号索引对应的符号上的PRACH资源，和冲突时隙之外的其他时隙上的PRACH资源。
结合第二方面，在一种可能的实现方式中，所述位置调整信息还包括冲突时隙索引。
结合第二方面，在一种可能的实现方式中，所述位置调整信息包括不可用符号索引，所述不可用符号索引指示第二网络设备不可以使用所述可用符号索引对应的符号上的PRACH资源，或指示第二网络设备使用除所述不可用符号索引对应的符号外的其他符号上的PRACH资源。
结合第二方面，在一种可能的实现方式中，所述位置调整信息包括冲突时隙中的不可用符号索引，所述冲突时隙中的不可用符号索引指示第二网络设备不可以使用冲突时隙中的不可用符号索引对应的符号上的PRACH资源。
结合第二方面，在一种可能的实现方式中，所述位置调整信息包括可用时隙索引，所述可用时隙索引指示第二网络设备可以使用所述可用时隙索引对应的时隙上的PRACH资源。
结合第二方面，在一种可能的实现方式中，所述位置调整信息包括系统帧的偏移量和时隙的偏移量。
本申请实施例中的技术方案可以将系统帧偏移量、时隙的偏移量和符号的偏移量进行组合选择，可以针对具体的情况选择合适的位置调整信息，也可以使用上述三种信息中的至少两种共同指示第二网络设备，提高了资源利用率。
结合第二方面，在一种可能的实现方式中，所述第一PRACH资源的配置信息承载于系统广播消息或无线资源控制配置消息中。
结合第二方面，在一种可能的实现方式中，第一PRACH资源的配置信息初始可以通过系统消息进行配置，而当第一PRACH资源的配置信息发生变化时，采用RRC配置消息进行配置。
结合第二方面，在一种可能的实现方式中，该第一网络设备可以为IAB节点，第二网络设备可以为宿主基站或第一网络设备的上级节点。
结合第二方面，在一种可能的实现方式中，所述第二网络设备向第一网络设备发送所述位置调整信息，包括：
所述第二网络设备通过F1应用协议AP接口或无线资源控制RRC消息或者介质访问控制控制元素MAC CE向所述第一网络设备发送所述位置调整信息。
结合第二方面，在一种可能的实现方式中，第二网络设备是另一个IAB节点，第二网络设备向第一网络设备发送位置调整信息包括：第二网络设备通过宿主基站向第一网络设备发送位置调整信息，或者直接向第一网络设备发送位置调整信息。如果位置调整信息是第二网络设备生成的，此时，需要通过宿主基站将位置调整信息发送给第一网络设备，也可以直接向第一网络设备发送位置调整信息，如通过MAC CE。
应理解，第二网络设备接收第一网络设备发送的随机接入请求所用的随机接入资源，与第一网络设备向第二网络设备发送随机接入请求所用的随机接入资源相同，均为第二 PRACH资源。
第三方面，提供一种通信装置，包括用于执行第一方面或第一方面中任一种可能实现方式中方法的模块或单元。
可选地，第三方面的通信装置可以为上文提到的第一网络设备，或者可以为用于第一网络设备的部件(例如芯片或电路等)。
第四方面，提供一种通信装置，包括用于执行第二方面或第二方面中任一种可能实现方式中方法的模块或单元。
可选地，第四方面的通信装置可以为上文提到的第二网络设备，或者可以为用于第二网络设备的部件(例如芯片或电路等)。
第五方面，提供一种通信装置，所述通信装置包括：至少一个处理器和通信接口，所述通信接口用于所述通信装置与其他通信装置进行信息交互，当程序指令在所述至少一个处理器中执行时，使得所述通信装置实现上文中的第一网络设备的功能。
第六方面，提供一种通信装置，所述通信装置包括：至少一个处理器和通信接口，所述通信接口用于所述通信装置与其他通信装置进行信息交互，当程序指令在所述至少一个处理器中执行时，使得所述通信装置实现上文中的第二网络设备的功能。
第七方面，提供一种通信装置，所述通信装置包括：收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该通信装置执行第一方面或第一方面中任一种可能实现方式中的方法。
第八方面，提供一种通信装置，所述通信装置包括：收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该通信装置执行第二方面或第二方面的任一种可能的实现方式所述的方法。
第九方面，提供一种芯片，用于执行第一方面或第一方面的任一种可能的实现方式所述的方法。
第十方面，提供一种芯片，用于执行第二方面或第二方面的任一种可能的实现方式所述的方法。
第十一方面，提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当所述指令在计算机上运行时，使得计算机执行第一方面或第一方面的任一种可能的实现方式所述的方法。
第十二方面，提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当所述指令在计算机上运行时，使得计算机执行第二方面或第二方面的任一种可能的实现方式所述的方法。
第十三方面，提供一种包含指令的计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行第一方面或第一方面的任一种可能的实现方式所述的方法。
第十四方面，提供一种包含指令的计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行第二方面或第二方面的任一种可能的实现方式所述的方法。
第十五方面，提供一种通信系统，包括上文中的第一网络设备和第二网络设备。
附图说明
图1是本申请实施例的应用场景的示意图。
图2是本申请实施例中的应用场景中的部分网络设备的示意图。
图3是本申请实施例的通信资源的示意图。
图4是本申请实施例的随机接入资源配置方法的示意性流程图。
图5是本申请一个实施例的通信资源的示意图。
图6是本申请一个实施例的通信资源的示意图。
图7是本申请另一个实施例的通信资源的示意图。
图8是本申请又一个实施例的通信资源的示意图。
图9是本申请又一个实施例的通信资源的示意图。
图10是本申请一个实施例提供的通信装置的示意性结构图。
图11是本申请一个实施例提供的通信装置的示意性结构图。
图12是本申请另一个实施例提供的通信装置的示意性结构图。
图13是本申请另一个实施例提供的通信装置的示意性结构图。
图14是本申请又一个实施例提供的通信装置的示意性结构图。
图15是本申请又一个实施例提供的通信装置的示意性结构图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
图1示出了本申请实施例的应用场景示意图。如图1所示，该应用场景中可以包括宿主基站110、中继站120和140、终端130和150。
宿主基站110，也可以称为宿主站，是在普通基站上增加了中继(Relay)功能的基站，宿主基站110支持普通终端例如终端130的接入，也支持中继站例如中继站120的接入。基站可用于将终端设备接入无线网络(radio access network，RAN)，因此，基站有时也可称为接入网设备或接入网节点。可以理解的是，采用不同无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同。为方便描述，本申请实施例将为终端提供无线接入功能的装置统称为基站。在本申请实施例中，普通基站可以是长期演进(long term evolution，LTE)网络中的演进型节点B(evolved node B，eNB)，则宿主基站110可以表示为DeNB(donor eNodeB，DeNB)，普通基站也可以是第五代(the fifth generation，5G)移动通信系统中的下一代基站节点(next generation node basestation，gNB)，则宿主基站110可以表示为DgNB(donor gNodeB，DgNB)，普通基站还可以是其他具备基站功能的设备或者未来5G网络中的网络设备等。宿主基站110可以是宏基站，也可以是微基站。一个宿主基站110的覆盖范围内可以包括一个小区，也可以包括多个小区，示例性的，宿主基站覆盖的小区可以称为宿主小区，宿主小区可以覆盖不同的方向，每个宿主小区可以接入一定数量的中继站和终端。
中继站120，用于为宿主基站110提供无线回传服务。中继站120可以通过无线信号接入宿主基站110并建立空口承载，还可以支持覆盖范围内的终端例如终端150接入。中继站也可以称为无线回传设备、中继设备、子站、子节点等，在5G系统中，中继站可以称为接入回传一体化(integrated access and backhaul，IAB)设备、IAB节点。中继站与中 继站之间可以级联(即多跳)，如图1所示的中继站120与中继站140的级联。中继站120支持终端150的接入，也支持中继站140的接入，在这种场景下，中继站120可以称为中继站140的父节点或上级节点，中继站140可以称为中继站120的子节点或下级节点，中继站140还可以有其自身的子节点(图中未示出)。应理解，父节点与子节点、上级节点与下级节点均是相对的概念，例如某个中继站可以是其父节点的子节点，也可以是其子节点的父节点。为方便描述，本申请实施例中，将中继站120和140为IAB节点为例进行说明。
终端130和150可以经基站与一个或多个核心网(core network，CN)进行通信。终端设备也可以称为用户设备(user equipment，UE)、接入终端、终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、无线网络设备、用户代理或用户装置。终端可以是蜂窝电话(cellular phone)、无绳电话、会话启动协议(session initiation protocol，SIP)电话、智能电话(smart phone)、无线本地环路(wireless localloop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它设备、车载设备、可穿戴设备、无人机设备或物联网、车联网中的终端以及未来网络中的任意形态的终端、中继用户设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端等。本申请实施例对此并不限定。为方便描述，在本申请实施例中，将上述接入网络的终端设备统称为终端，在某些实施例中，还可以用UE标识该终端。终端可以直接接入宿主基站，也可以接入中继站，如图1所示，终端130直接接入宿主基站110，终端150接入中继站120，终端130也可以接入中继站，终端150也可以接入宿主基站，图中的终端接入状况仅为示例。
在集成接入回传IAB网络中，网络设备为普通终端提供接入服务的链路为接入链路，网络设备之间相互传输信息与数据的链路为回传链路。如图1所示，终端130与宿主基站110之间的通信链路171、终端150与中继站120之间的通信链路172均为接入链路，宿主基站110与中继站120之间的通信链路161、中继站120与中继站140之间的通信链路162均为回传链路。其中，回传链路上传输的信息与数据可以包括来自核心网或上级网络设备节点发送的、网络设备工作所必须的信令与数据，也包括终端的数据与信令。在本申请实施例中，“两条链路”指的是接入链路与回传链路、回传链路与回传链路中的任一种。
需要说明的是，图1中宿主基站、中继站以及终端的数量仅仅是示例性说明，对本申请实施例不构成任何限定，并且各个节点或设备的名称仅是一个示例，在具体实现中，该系统架构中的节点或设备还可以有其他的名称，本申请实施例对此不做具体限定。
应理解，本申请实施例并不限于图1所示的系统架构。例如，可以应用本申请实施例的技术方案的应用场景中可以包括更多或更少的节点或设备。
上文提到中继站可以接入上级节点或宿主基站，也可以支持终端的接入，这是由于中继站中同时包括接入功能/模块和回传功能/模块。图2示出了图1的应用场景中的部分网络设备，如图2所示，以中继站120为IAB设备为例，IAB设备可以包括两部分功能模块，分别为移动终端(mobile-termination，MT)功能模块和分布式单元(distributed unit，DU)功能模块。其中，MT功能模块用于回传功能/模块，DU功能模块用于接入功能/模块。MT功能被定义为类似UE的一个组件，在IAB中，MT可以被称为驻留在IAB节点上的 功能，IAB节点可以通过MT接入到上级节点或上级网络。DU功能是相对集中式单元(centralized unit，CU)功能而言的。在5G中，基站功能被分为两部分，称之为CU-DU分离。从协议栈角度看，CU包括了原LTE基站的无线资源控制(radio resource control，RRC)层和分组数据汇聚协议(packet data convergence protocol，PDCP)层，DU包括了无线链路控制(radio link control，RLC)层、介质访问控制(media access control，MAC)层和物理层(physical layer，PHY)。CU与DU物理上可以通过光纤连接，在逻辑上可以通过一个专门定义的F1接口进行通信。从功能的角度看，CU主要负责无线资源控制与配置、跨小区移动性管理、承载管理等，DU主要负责调度、物理信号生成与发送等。
在IAB中，对时分双工(time division duplexing，TDD)系统而言，IAB设备的接入功能和回传功能以时分复用(time division multiplexing，TDM)的方式进行传输，换句话说，在一个特定的时间单元内，只有接入功能在工作，或者只有回传功能在工作，两个功能不能同时进行工作，当只有接入功能或只有回传功能进行工作时，接入功能或回传功能在所分配的时间资源上可以使用系统的全部资源，包括频域资源和硬件资源等。
当UE接入网络(例如宿主基站或IAB节点)或IAB设备接入上级节点或宿主基站时，均需要使用随机接入(random access)资源。UE使用的随机接入资源可以通过读取网络，例如基站设备，广播的系统消息，获取物理随机接入信道(physical random access channel，PRACH)的配置信息；IAB设备使用的随机接入资源可以通过其上级节点或宿主基站广播的系统消息或上级节点或宿主基站发送的高层信令消息等来获取PRACH资源的配置信息。上述PRACH资源配置消息可以指示UE或IAB设备可以使用的时间资源、频域资源、前导码(preamble)信息、重传次数、发送功率等。为了更好的理解本申请的技术方案，下面以PRACH资源配置消息为物理随机接入信道配置索引(prach-configurationIndex)为例进行详细描述。
在5G系统中，物理随机接入信道配置索引共有256个索引值，取值范围为0-255，通过索引值可以确定前导码的格式以及PRACH资源的时域信息等。UE或IAB节点通过广播的索引，即可获取索引对应的PRACH资源的配置信息，也即宿主基站或上级节点为UE或IAB节点配置的随机接入资源。下面的表1示出了部分索引与索引对应的PRACH资源的配置信息的协议表格，以表中所示的物理随机接入信道配置索引为例，进行描述。应理解，表1仅是一个示例，并不构成对本申请的限定。
表1物理随机接入信道配置索引与索引对应的PRACH配置信息
Figure PCTCN2020071448-appb-000001
如表1中所示，第一列参数为PRACH配置索引，索引值取值范围为0-255，每个索引值对应着一个PRACH配置，UE或IAB节点获取PRACH配置索引后即可根据该索引值与PRACH配置的对应关系，确定宿主基站或上级节点为UE或IAB节点配置的随机接入资源的时域位置。
应理解，表中仅以前4个索引与该4个索引对应的PRACH配置作为示例性说明，随着通信技术的发展，PRACH配置索引可以比上述给出的索引值个数256更多或更少，索引值对应PRACH配置也可以更新或变化，本申请实施例仅以此为例进行示例性的说明。
第二列参数为前导码格式。前导码格式与小区的覆盖半径有关，不同的部署场景，如小区覆盖半径、是否支持通知UE等，可以选择不同的前导码格式。前导码(preamble)是UE或IAB节点在物理随机接入信道中发送的实际内容之一，由循环前缀(cyclic prefix，CP)和序列(sequence)组成，用于随机接入时识别用户身份。不同的前导码格式的CP、序列长度、序列的重复次数、保护间隔的长度不同。
第三列参数为n SFN mod x＝y，指示了在时域上，具体哪些系统帧上配置有PRACH资源。n SFN表示系统帧号，mod为取余计算，y为余数。
以表中索引为0为例，对于x＝16，y＝1的情况，当前系统帧号n SFN/(x＝16)的余数为(y＝1)时，该系统帧号上配置有PRACH资源。因此，可以理解，当系统帧号为1、17、33、……、(16*a+1)(其中a为大于等于0的整数)时，该系统帧号上配置有PRACH资源。
再例如，对于x＝8，y＝2的情况，当前系统帧号n SFN/(x＝8)的余数为(y＝2)时，当前系统帧号上配置有PRACH资源。因此，可以理解，当系统帧号为2、10、18、26、……、(8*b+2)(其中b为大于等于0的整数)时，该系统帧号上配置有PRACH资源。
在本申请实施例中，一个系统帧为10ms，对于x＝16，y＝1的情况，可以理解为两个PRACH资源间隔16个系统帧，即PRACH资源周期为160ms；对于x＝8，y＝2的情况，可以理解为两个PRACH资源间隔8个系统帧，即PRACH资源周期为80ms。应理解，以上对于哪些系统帧上配置有PRACH资源的说明，仅是示例性的。还应理解，在本申请实 施例中，系统帧号增加可以表示为绝对时间向后推移，例如帧号增加1，表示绝对时间向后推移了一个系统帧，即向后推移10ms。
应理解，上述仅是一个示例，并不构成对本申请的限定。
表格中的第四列参数为时隙编号，进一步地指示了在有PRACH资源的系统帧上，在哪些时隙上配置有PRACH资源。LTE系统的时频资源，在时域上可以分为多个10ms的无线帧，一个无线帧包含10个1ms的子帧，一个子帧中有两个时隙(slot)，每个时隙包括7个符号(symbol)或6个符号。
5G定义了新的空口接入技术，引入了多种子载波间隔(subcarrier spacing，SCS)，不同的子载波间隔可以对应着不同的时隙长度和符号长度。例如，对于子载波间隔为60KHz的系统，一个系统帧内最大可以拥有40个时隙，每个时隙的长度为0.25ms。
本申请实施例中，将该40个时隙从0至39进行编号，分别可以记做时隙#0(slot#0)，时隙#1(slot#1)，……，时隙#39(slot#39)等。表1中的时隙编号可以理解为指示了在一个10ms系统帧中，哪些时隙上配置有PRACH资源。以时隙#39配置有PRACH资源为例，表示配置有PRACH资源的系统帧内，在最后一个时隙配置有PRACH资源。
由于在5G中，不同的子载波间隔对应着不同的时隙长度，对于一个120KHz子载波间隔系统，一个系统帧拥有80个时隙，每个时隙为0.125ms。本申请实施例中将其编号为第0号时隙至第79号时隙，上述按照60kHz的子载波间隔指示的配置有PRACH资源的时隙#39，对应到120kHz子载波间隔的系统时，10ms系统帧的最后两个时隙即为第78和79号时隙上配置有PRACH资源。因此，可以理解的是，不同的子载波间隔对应着不同的时隙长度，时隙编号指示的时域位置要根据其对应的子载波间隔来确定。
表1中的第五列参数为映射开始符号，该参数进一步地指示了在配置有PRACH资源的时隙上，PRACH资源从第几个符号开始映射的。对于任意的子载波间隔，一个时隙均拥有14个符号，本申请实施例中，将一个时隙中的14个符号依次编号为符号#0至符号#13，符号#0即为一个时隙中的第一个符号。以表1中索引值为0为例，第五列的参数为0，表示PRACH资源是从一个时隙中的第0号符号(即符号#0或第一个符号)开始映射。
第六列参数对于子载波间隔为120kHz来说，如表1中所示，1表示0.25ms的后一半即第二个0.125ms中配置有PRACH资源，2表示2个0.125ms都配置有PRACH资源。该参数对于子载波间隔为60kHz没有意义。
表中的第七列参数为一个PRACH的时隙内，PRACH时机数量，指示了在时域上的一个时隙内，有多少PRACH时机(occasion)。
第八列参数为PRACH资源持续时间，指示了一个PRACH时机的长度，单位为符号数。以表中索引为0为例，PRACH资源持续时间为2表示一个PRACH时机的长度为两个正交频分复用(orthogonal frequency division multiplexing，OFDM)符号。不同的PRACH时机，长度可以不同，即不同的PRACH时机可以包括不同数量的OFDM符号。
综上，以子载波间隔为60kHz为例，结合表1中索引为0时第三列参数指示系统帧号为16的倍数余1、第四列参数指示配置有PRACH资源的时隙编号、以及第五列参数指示的PRACH资源开始映射符号和第七列参数指示的一个时隙中有6个PRACH时机，可以得出，当PRACH配置索引为0时，在系统帧号为1、17、33、……等的系统帧中，在时隙#4，#9，#14，#19，#24，#29，#34，#39中配置有PRACH资源。
具体地，在上述的每个时隙中，PRACH资源在符号上的位置如图3所示。上述每个时隙中，共有6个PRACH时机，又称为随机接入信道(random access channel，RACH)时机，也可以表示为RACH时机(RACH occasion，RO)，包括时机1(RO31)至时机6(RO36)，每个PRACH时机长度为2个符号，因此从符号#0至符号#11配置有PRACH资源。时机RO31包括符号#0和符号#1，时机RO32包括符号#2和符号#3，以此类推，时机RO36包括符号#10和符号#11。
从表1中还可以看出，对于不同的随机接入信道配置索引，其对应的PRACH资源的时域位置有可能相同或部分重叠。
例如，随机接入信道配置索引0和1对应的PRACH资源配置中，从系统帧的角度看，两种配置中的每个系统帧中均配置有PRACH资源；进一步地，从时隙的角度看，两种配置中的时隙#19、时隙#39中均配置有PRACH资源；再进一步地，两种配置中配置有PRACH资源的时隙#19、#39中PRACH开始的符号、PRACH时机数量以及PRACH的持续时间均相同，也就是说两种配置中，PRACH资源在时隙#19和#39完全相同。
对一个IAB节点，由于同时需要接入上级节点，也需要接收IAB节点所服务的终端或下级IAB节点的发送的随机接入前导，就可能会导致IAB节点的两条链路的PRACH资源在时域上重叠，也可以称为两条链路的PRACH资源在时域上冲突，即两条链路的PRACH资源在时域上有任何交叉或交集。这里的两条链路可以指接入链路与回传链路，也可以指回传链路与回传链路，其中，回传链路与回传链路包括IAB节点和上级节点的回传链路以及IAB节点和下级节点的回传链路。
对于IAB网络，可用资源的总和对于接入链路和回传链路是固定的。以随机接入资源为例，UE要接入网络时，IAB作为网络设备需要给UE提供接入服务，即需要为UE配置PRACH资源，同时需要接收UE发送的随机接入请求；IAB节点要接入宿主基站或上级节点时，需要宿主基站或上级节点为其配置PRACH资源。
由于IAB节点存在半双工约束，若IAB节点为UE配置的PRACH资源与上级节点为IAB节点配置的PRACH资源在时域上相同或部分重叠，则当IAB节点接收来自UE的随机接入请求时，无法向上级节点或宿主基站发送随机接入请求。
在一种可能的实现中，可以通过协议定义，当IAB节点的回传链路上的PRACH资源和接入链路上的PRACH资源配置发送冲突的时候，以接入链路上的PRACH配置优先。即，回传链路上出现冲突的PRACH资源上不进行RACH前导的传输。这一方法可以简化协议，仅通过定义接入链路PRACH优先即可解决。同时考虑到回传链路上的随机接入过程并不是经常发生的，因此，对系统的影响相对较小。应理解，当接入和回传链路上的PRACH资源配置完全一样时，则不能采用这一方案。
上述以接入链路的PRACH优先的方案在IAB节点的回传链路异常时，以及请求发送调度请求的场景下，由于部分回传链路上的PRACH资源无效，会导致IAB节点需要等待较长时间才可能接入网络。
在一种可能的实现中，网络在IAB节点接入网络后，为其配置IAB节点专用的PRACH资源。由于当前标准定义了256种不同的PRACH配置，配置专用PRACH资源的方法不仅限制了网络选择PRACH配置的灵活性，并且很有可能与IAB节点为UE配置的PRACH资源在时域上冲突。
而在另一种可能的实现中，明确地为IAB节点配置PRACH资源的不同参数，例如系统帧号、时隙号、符号位置等，这种显示配置每个参数会造成开销过大。
再一种可能的实现方式是明确为IAB节点配置系统帧号，以使上述两种PRACH资源在不同的系统帧上，达到PRACH资源跨越相邻的跳之间正交化，但该方法对于每个系统帧上都存在PRACH资源的情况下不再有效。
因此，需提供一种能够使IAB节点发送随机接入的时域资源与IAB节点接收随机接入的时域资源不重叠的方法。本申请实施例提供一种随机接入资源配置方法可以解决IAB节点在接入链路和回传链路上的随机接入资源的配置问题，下面结合图4，对本申请实施例进行详细描述。
需要说明的是，IAB的接入功能和回传功能还可以支持空分复用或者全双工通信，本申请实施例仅以IAB在时分双工系统中的时分复用传输方式为例进行示例性描述。
图4示出了本申请实施例的随机接入资源配置方法的示意性流程图。图4的方法可以由第一网络设备执行。该第一网络设备例如可以是图1和图2所示的中继站120，例如IAB设备。该方法包括步骤S410至步骤S440。
在步骤S410，第一网络设备接收第一PRACH资源的配置信息。
第一网络设备可以是图1或图2所示的中继站120。在本申请实施例中，第一网络设备可以是进行半双工通信的设备，也可以是进行全双工通信的设备。示例性的，第一网络设备可以为IAB节点。
第一PRACH资源的配置信息指示了第一网络设备初始接入时，网络为第一网络设备配置的初始PRACH资源。该第一PRACH资源的配置信息可以是第一网络设备从第二网络设备接收的，也可以是从其他网络设备接收的，该第二网络设备可以是图1或图2所示的宿主基站110，也可以是第一网络设备的上级节点，例如上级IAB节点。例如，若第二网络设备为上级IAB节点，则第一PRACH资源的配置信息可以是上级IAB节点发送给第一网络设备的，也可以是其他网络设备例如宿主基站发送的；若第二网络设备为宿主基站，则第一PRACH资源的配置信息可以是宿主基站发送给第一网络设备的，也可以是其他网络设备例如上级IAB节点发送的。
该第一PRACH资源的配置信息可以通过广播的系统消息进行配置，也可以通过RRC配置消息进行配置，还可以通过新的信令消息，如新增的资源指示信令或资源配置信令等进行配置。
在一种可能的实现中，第一PRACH资源的配置信息初始可以通过系统消息进行配置，而当第一PRACH资源的配置信息发生变化时，采用RRC配置消息进行配置。
该第一PRACH资源的配置信息可以是PRACH配置索引，也可以是其他可指示第一PRACH资源配置的信息。
在步骤S420，第一网络设备接收位置调整信息。
位置调整信息用于指示在时隙或符号上调整第一PRACH资源中的至少一部分PRACH资源的位置，以确定第二PRACH资源。第二PRACH资源用于第一网络设备向第二网络设备发送随机接入请求。第一PRACH资源与第一网络设备为UE或第一网络设备的子节点配置的第三PRACH资源在时域上有重叠，第一PRACH资源按照位置调整信息进行调整后得到的第二PRACH资源与第三PRACH资源在时域上不重叠。
应理解，时域上有重叠包括第一PRACH资源和第三PRACH资源在某些时隙或者某些时隙上的某些符号上相同，或者是某些时隙的某些符号所在的时间上相同。如果IAB节点的接入链路和回传链路采用不同的波形参数，则可能会导致接入链路和回传链路上的符号位置不完全相同，但是，在一个系统帧中，接入链路和回传链路的PRACH资源所在的时间是相同的，时间是相同是指在系统帧中的时域位置相同。波形参数包括子载波、传输时间间隔(transmission time interval，TTI)中的至少一种。
该位置调整信息可以是由第一网络设备的上级节点发送给第一网络设备的，也可以是由宿主基站发送给第一网络设备的。
该位置调整信息可以是和第一PRACH资源的配置信息一同由同一网络设备例如第二网络设备发送给第一网络设备，也可以是由不同的网络设备在不同的时间发送给第一网络设备。换句话说，步骤S410和步骤S420可以是同时进行的，也可以是分开进行的，在一些实施例中，步骤S410和步骤S420还可以调换顺序。
从第二网络设备的角度，同样地需要获取位置调整信息，位置调整信息用于指示在时隙或符号上调整第一物理随机接入信道PRACH资源中的至少一部分PRACH资源的位置。通过获取位置调整信息，第二网络设备还可以确定第二PRACH资源。第二网络设备可以在第二PRACH资源上接收第一网络设备发送的随机接入请求。
该位置调整信息的确定方式有多种。
作为一种可能的实现方式，该位置调整信息可以是由宿主基站确定的。例如，宿主基站可以获取其服务小区内的多个接入链路和回传链路的PRACH资源的配置信息，自然可以获取第一网络设备的两条链路上的PRACH资源在时域上的位置信息，进而确定该位置调整信息。
作为另一种可能的实现方式，该位置调整信息可以是由第一网络设备的上级节点确定的，第一网络设备的上级节点为另一个IAB节点。例如第一网络设备的上级节点可以根据第一网络设备接收随机接入请求的时间，确定第一网络设备发送随机接入请求的时间，也就可以确定该位置调整信息；或者，第一网络设备的上级节点可以根据第一网络设备的两条链路上的PRACH资源在时域上的位置信息，进而确定该位置调整信息。
作为又一种可能的实现方式，该位置调整信息也可以是通过核心网设备，例如运行与维护服务器(operation and management)确定的。例如，运营商可以通过远端服务器，通过算法或手动配置第一网络设备的随机接入资源，其中也可以包括该位置调整信息。
如果第二网络设备为另一个IAB节点，第二网络设备也可以从宿主基站接收位置调整信息，以用于调整接入链路上第一网络设备的接入PRACH资源，以获得第二PRACH资源，并在该第二PRACH资源上接收第一网络设备发送的PRACH资源。
在一种可能的实现中，第二网络设备也可以接收宿主基站发送的第一网络设备的接入链路的PRACH资源，即第三PRACH资源的配置，第二网络设备通过第一PRACH资源和第三PRACH资源确定位置调整偏移量。
该位置调整信息可以是指示调整第一PRACH资源在系统帧上的位置，可以是指示调整第一PRACH资源在时隙上的位置，也可以是指示调整第一PRACH资源在符号上的位置，还可以是指示第一PRACH资源在时隙或符号上的有效或失效状态，或者是结合上述指示方式中的一种或多种。应理解，这里所述的“有效”是指第一网络设备可以使用位置调 整信息所指示的有效时隙或符号上的PRACH资源，“失效”是指第一网络设备不可以使用位置调整信息所指示的失效时隙或符号上的PRACH资源或在相应的位置不再映射RO，或不使用第一网络设备所指示的有效时隙或符号之外的其他时隙或符号上的PRACH资源。
在步骤S430，第一网络设备根据第一PRACH资源的配置信息和位置调整信息确定第二PRACH资源。
该第二PRACH资源是第一PRACH资源在时域位置上经调整后得到的。
该第二PRACH资源用于第一网络设备向第二网络设备发送随机接入请求。
该第二PRACH资源与第一网络设备为UE或第一网络设备的子节点配置的第三PRACH资源在时域上不冲突。
应理解，第一网络设备根据第一PRACH资源的配置信息可以确定第一PRACH资源的时域信息。
第一网络设备确定第二PRACH资源的方式有多种。
作为一种可能的实现方式，位置调整信息可以包括时隙偏移量(slot offset)，时隙偏移量可以是正数或负数。正数表示向后偏移，负数表示向前偏移。或者正数表示向前偏移，负数表示向后偏移。具体的意义本申请不做限定。
第一网络设备可以将第一PRACH资源中的至少一部分PRACH资源按照时隙偏移量进行偏移，得到第二PRACH资源。
示例性的，第一网络设备根据第一PRACH资源的配置信息可以确定配置有第一PRACH资源的时隙信息，例如时隙编号等，将第一PRACH资源中的至少一部分PRACH资源按照位置调整信息指示的时隙偏移量进行偏移，则第一网络设备可以将第一PRACH资源在时隙上进行偏移后的PRACH资源和第一PRACH资源在时隙上未进行偏移的PRACH资源确定为第二PRACH资源。
例如，位置调整信息用于指示将第一PRACH资源的全部资源在时隙上进行偏移，则第一网络设备可以将按照时隙偏移量偏移到新的时隙位置的第一PRACH资源的全部资源确定为第二PRACH资源。
又如，位置调整信息用于指示将第一PRACH资源中的一部分PRACH资源在时隙上进行偏移，则第一网络设备可以将按照时隙偏移量偏移到新的时隙位置的一部分PRACH资源和未进行偏移的其余部分PRACH资源确定为第二PRACH资源。
示例性的，该位置调整信息还可以包括目标时隙的位置信息，第一网络设备可以将目标时隙上的PRACH资源进行偏移，以得到第二PRACH资源。该目标时隙可以是第一PRACH资源与第三PRACH资源冲突的至少一部分时隙，也可以是任意的一部分时隙，或是所有时隙。
例如，目标时隙为第一PRACH资源与第三PRACH资源冲突的时隙，则位置调整信息指示将第一PRACH资源与第三PRACH资源在目标时隙上冲突的PRACH资源进行偏移，第一网络设备可以确定偏移到新的时隙位置的PRACH资源，以及第一PRACH资源与第三PRACH资源在时隙上不冲突的PRACH资源为第二PRACH资源。
需要说明的是，在本申请实施例中，资源重叠和资源冲突的含义相同，可以相互替换；资源冲突的时隙可以称为冲突时隙，资源冲突的符号可以称为冲突符号。
第一网络设备获取第一PRACH资源与第三PRACH资源冲突的时隙可以有多种方式。
作为一个示例，可以由第一网络设备的上级节点或宿主基站确定后，通过位置调整信息通知第一网络设备，换句话说，位置调整信息中可以包括第一PRACH资源与第三PRACH资源存在冲突的时隙信息，例如冲突时隙编号，该冲突时隙也可以理解为上述的目标时隙。
作为另一个示例，可以由第一网络设备根据第一PRACH资源的配置信息和第三PRACH资源的配置信息确定第一PRACH资源与第三PRACH资源冲突的时隙。例如，第一网络设备可以通过第一PRACH配置索引和第三PRACH配置索引确定相应的配置信息，确定第一PRACH资源与第三PRACH资源具有的相同时隙编号，或对应的时隙编号在时域上的位置相同，进而确定均配置有第一PRACH资源与第三PRACH资源的时隙编号，即为冲突时隙。
应理解，当接入链路和回传链路的PRACH使用不同的波形参数时，时隙号并不是相同的，但是接入链路和回传链路的不同时隙所对应的时域资源的位置可能是相同的，也会存在冲突。因此，可以通过接入链路和回传链路的时隙在时域上的对应关系确定第一PRACH资源的冲突时隙，进而确定回传链路上需要调整的PRACH资源的时隙。
作为另一种可能的实现方式，位置调整信息中可以包括不可用的时隙或系统帧信息，例如时隙编号或系统帧号。换句话说，位置调整信息指示第一PRACH资源中，哪些时隙或者系统帧上不可用，第一网络设备可以将配置有第一PRACH资源的时隙或系统帧中除不可用的时隙或系统帧之外，其他时隙或系统帧上的第一PRACH资源确定为第二PRACH资源。
作为又一种可能的实现方式，位置调整信息中可以包括符号偏移量(symbol offset)。
第一网络设备可以将第一PRACH资源中的至少一部分PRACH资源按照符号偏移量进行偏移，得到第二PRACH资源。
示例性的，第一网络设备根据第一PRACH资源的配置信息可以确定配置有第一PRACH资源的时隙信息和符号信息，例如时隙编号、PRACH时机、RO的符号个数、PRACH资源映射的起始符号编号等，将第一PRACH资源中的至少一部分PRACH资源按照位置调整信息指示的符号偏移量进行偏移，则第一网络设备可以将第一PRACH资源在符号上进行偏移后的PRACH资源和第一PRACH资源在符号上未进行偏移的PRACH资源确定为第二PRACH资源。
该符号偏移量可以是指示单独符号的偏移，也可以是指示RO起始符号索引的偏移。
例如，位置调整信息用于指示将第一PRACH资源的全部资源在符号上进行偏移，则第一网络设备可以将按照符号偏移量偏移到新的符号位置的第一PRACH资源的全部资源确定为第二PRACH资源。
又如，位置调整信息用于指示将第一PRACH资源中的一部分PRACH资源在符号上进行偏移，则第一网络设备可以将按照符号偏移量偏移到新的符号位置的一部分PRACH资源和未进行偏移的其余部分PRACH资源确定为第二PRACH资源。
示例性的，该位置调整信息还可以包括目标符号的位置信息，第一网络设备可以将目标符号上的PRACH资源进行偏移，以得到第二PRACH资源。该目标符号可以是第一PRACH资源与第三PRACH资源冲突的至少一部分符号，也可以是任意的一部分符号， 或是所有符号。
示例性的，目标符号为第一PRACH资源与第三PRACH资源冲突的符号，则位置调整信息指示将第一PRACH资源与第三PRACH资源在时隙或时域上重叠的PRACH资源在符号上进行偏移。第一网络设备可以确定偏移到新的符号位置的PRACH资源，以及第一PRACH资源与第三PRACH资源在符号上不重叠的PRACH资源为第二PRACH资源。
应理解，当接入链路和回传链路的PRACH使用不同的波形参数时，时隙号并不是相同的，但是接入链路和回传链路的不同时隙所对应的时域资源的位置可能是相同的，也会存在冲突。此时，可以通过将第一PRACH资源中时域上和第三PRACH资源冲突的符号进行偏移，避免冲突。
再如，位置调整信息可以包括RO起始符号索引偏移量，第一网络设备可以获取第一PRACH资源在时域上的PRACH时机和每个PRACH时机的长度(符号个数)，由于PRACH时机中符号可以是连续的，则位置调整信息指示了PRACH时机的起始符号索引的偏移量，即可以自行将该PRACH时机整体偏移，相当于将其中的每个符号上的PRACH资源进行偏移。类似地，当位置调整信息用于指示RO起始符号索引偏移量时，该方法同样适用于将第一PRACH资源在符号上进行整体偏移或部分偏移，第一网络设备确定第二PRACH资源的方式同上文所述的方法类似，为简洁，在此不再赘述。
可选地，若第一PRACH资源按照符号偏移量进行偏移后，该第一PRACH资源偏移出当前时隙或者是偏移至下一个时隙，则移出当前时隙的符号上的PRACH资源则不再有效，偏移后仍在当前时隙的符号上的PRACH资源仍有效。这样可以避免由于偏移出当前时隙可能对其他时隙上的信号传输产生的影响。
第一网络设备获取第一PRACH资源与第三PRACH资源重叠时隙中的冲突符号可以有多种方式。
应理解，重叠时隙或冲突时隙是指第一PRACH资源中冲突资源所在的时隙，和第三PRACH资源中冲突资源所在的时隙号可能相同或不同。当接入链路和回传链路的波形参数(如子载波间隔)不一致时，第一PRACH资源和第三PRACH资源的时隙号不同，重叠时隙或冲突时隙是指第一PRACH资源和第三PRACH资源在时域上处于同一位置时第一PRACH资源所对应的时隙。以下相同，不再赘述。
作为一个示例，可以由第一网络设备的上级节点或宿主基站确定冲突时隙和/或冲突符号后，通过位置调整信息通知第一网络设备，换句话说，位置调整信息中可以包括第一PRACH资源与第三PRACH资源存在冲突的时隙信息和/或符号信息，例如冲突时隙编号和/或冲突符号编号，该冲突符号可以理解为上述的目标符号。
作为另一个示例，可以由第一网络设备根据第一PRACH资源的配置信息和第三PRACH资源的配置信息确定第一PRACH资源与第三PRACH资源冲突的符号，例如，第一网络设备可以通过第一PRACH配置索引和第三PRACH配置索引确定相应的配置信息，确定配置有第一PRACH资源与第三PRACH资源的符号编号，进而确定均配置有第一PRACH资源与第三PRACH资源的符号编号，即为冲突符号。
作为又一种可能的实现方式，位置调整信息可以包括时隙或符号索引。该时隙或符号索引用于指示第一网络设备可以使用或不可以使用哪些时隙或符号上的随机接入资源。
作为又一种可能的实现方式，位置调整信息可以包括系统帧索引和/或周期，该系统 帧索引和/或周期用于指示第一网络设备可以使用或不可以使用哪些系统帧上的随机接入资源，或者可以理解为系统帧索引和/或周期用于指示第一网络设备间隔多久可以使用或不可以使用系统帧上的随机接入资源。所述周期可以理解为是第一网络设备发起两次随机接入的时间间隔，也就是指示第一网络设备使用第二PRACH资源的时间间隔。应理解，第一网络设备可以正常接收第一PRACH资源的配置信息，第一网络设备可以根据第一PRACH资源的配置信息确定配置给第一网络设备使用的第一PRACH资源，在位置调整信息包括周期时，第一网络设备还可以根据位置调整信息中的周期确定第一PRACH资源中可以使用哪些系统帧上的随机接入资源，不可以使用哪些系统帧上的随机接入资源，即根据位置调整信息中的周期确定间隔多久可以使用第一PRACH资源上的系统帧上的随机接入资源。
例如，位置调整信息可以包括可用符号索引，可用符号索引指示第一网络设备可以使用的符号，第一网络设备可以将可用符号索引对应的符号上的第一PRACH资源确定为第二PRACH资源。该情况下，可用符号索引适用于所有存在第一PRACH资源的时隙。该可用符号索引可以是上级节点或宿主基站显示配置的。
示例性的，位置调整信息指示了PRACH时机的编号或PRACH时机中起始符号的编号，第一网络设备可以将位置调整信息中指示的PRACH时机或符号上的第一PRACH资源确定为第二PRACH资源。
又如，位置调整信息可以包括冲突时隙中的可用符号索引，该情况下，该可用符号索引适用于冲突时隙，即位置调整信息指示在冲突时隙中哪些符号上的PRACH资源可用。第一PRACH资源和第三PRACH资源不存在重叠的时隙，第一PRACH资源均有效，因此第一网络设备可以将冲突时隙中可用符号上的PRACH资源和第一PRACH资源所在的时隙中除了冲突时隙之外的其他时隙上的PRACH资源确定为第二PRACH资源。
可选地，位置调整信息还可以包括冲突时隙的索引或编号，用于第一网络设备确定冲突时隙；或者第一网络设备根据第一PRACH资源和第三PRACH资源的配置信息自行确定冲突时隙，然后在冲突时隙中根据位置调整信息确定第一PRACH资源可用的符号。
再如，位置调整信息可以包括不可用符号索引，该不可用符号索引用于指示第一网络设备不可以使用冲突时隙中哪些符号上的PRACH资源，没有指示的其他符号上的PRACH资源可以使用。若该不可用符号索引适用于所有配置有第一PRACH资源的时隙，则第一网络设备可以将第一PRACH资源时隙中的符号中除了不可用符号之外的其他部分或全部符号确定为第二PRACH资源；若该不可用符号索引适用于冲突时隙中的配置有第一PRACH资源的符号，则第一网络设备可以将冲突时隙中除了不可用符号外的部分或全部其他符号和不冲突时隙上的PRACH资源(符号)确定为第二PRACH资源。
对于冲突时隙的确定方式同上述位置调整信息为可用符号时冲突时隙的确定方法类似，为简洁，在此不再赘述。
又例如，位置调整信息可以包括可用时隙索引，该可用时隙索引用于指示第一网络设备哪些时隙可以使用。若可用时隙索引适用于所有配置有第一PRACH资源的系统帧，则第一网络设备可以将可用时隙索引对应的时隙上的第一PRACH资源确定为第二PRACH资源；若可用时隙索引适用于第一PRACH资源与第三PRACH资源存在重叠/冲突的系统帧，则第一网络设备确定重叠/冲突的系统帧中可用时隙上的第一PRACH资源和不存在重 叠/冲突的系统帧中的第一PRACH资源为第二PRACH资源。该可用时隙索引可以是上级节点或宿主基站显示配置的，
上述这种可能的实现方式中，第一网络设备确定的第二PRACH资源是第一PRACH资源的子集。
上述是从第一网络设备的角度描述了第一节点确定第二PRACH资源的方法。从第二网络设备的角度，也需要确定位置调整信息和/或第二PRACH资源。第二网络设备获取位置调整信息，位置调整信息用于指示在时隙或符号上调整第一物理随机接入信道PRACH资源中的至少一部分PRACH资源的位置；第二网络设备向第一网络设备发送位置调整信息。
在一种可能的实现中，第二网络设备可以是宿主基站，此时，由于第二网络设备具有所有它所控制的IAB节点，即，第一网络设备的第三PRACH资源的配置信息，第三PRACH资源包括第一网络设备在接入链路上接收随机接入的资源，第二网络设备可以根据第一网络设备的上级节点的PRACH资源以及第一网络设备的第三PRACH资源确定位置调整信息。
如果宿主基站是第一网络设备的上级节点，则第二网络设备也需要确定第二PRACH资源，方法同前述实施例，不再赘述。确定位置调整信息的方法如前所述，不再赘述。此时第二网络设备还可以在第二PRACH资源上接收第一网络设备发送的随机接入请求。
在一种可能的实现中，第二网络设备可以是另一个IAB节点。此时，如果第二网络设备获得的位置调整信息是从宿主节点接收到的，则，第二网络设备确定第二PRACH资源的方法同第一网络设备，不再赘述。如果第二网络设备是通过第三PRACH资源自行确定位置调整信息，则第二网络设备可以在确定位置调整信息的时候，确定第二PRACH资源。
当第二网络设备为另一个IAB节点时，第二网络设备还可以通过节点间的相互测量获得第一网络设备的第三PRACH资源，而不需要从宿主基站接收第一网络设备的第三PRACH资源。此时，在确定位置调整信息后，第二网络设备还可以向宿主基站发送第一网络设备的位置调整信息，宿主基站通过F1AP(F1 application protocol，F1AP)接口(F1应用协议接口)或F1AP增强接口向第一网络设备发送位置调整信息；或者第二网络设备通过MAC信令(MAC control element，MAC CE)(介质访问控制控制元素)直接向第一网络设备发送位置调整信息。还可以通过其他的信令方式将位置调整信息发送给第一网络设备，如RRC消息，专用信令等。具体的方式本申请不做限定。本申请中，用F1AP接口表示F1AP接口或者F1AP增强接口，不再赘述。
上述实现中，第二网络设备是另一个IAB节点，此时，第二网络设备向第一网络设备发送位置调整信息包括：第二网络设备通过宿主基站向第一网络设备发送位置调整信息，或者直接向第一网络设备发送位置调整信息。如果位置调整信息是第二网络设备生成的，此时，需要通过宿主基站将位置调整信息发送给第一网络设备，也可以直接向第一网络设备发送位置调整信息，如通过MAC CE。
如果位置调整信息是宿主基站发送给第二网络设备的，则位置调整信息也需要发送给第一网络设备。此时可以是宿主基站通过第二网络设备转发给第一网络设备，此时第二网络设备向第一网络设备发送位置调整信息主要是转发宿主基站的位置调整信息。而另一种可能的实现是，第二网络设备在收到宿主基站发送的位置调整信息后，通过空口，如MAC  CE向第一网络设备发送位置调整信息。
应理解，宿主基站可以通过RRC消息或F1AP接口或F1AP增强接口向第一网络设备发送位置调整信息，此时第二网络设备仅仅是转发宿主基站向第一网络设备发送的位置调整信息。
当第二网络设备是另一个IAB节点时，第二网络设备还可以包括：确定第二PRACH资源。确定第二PRACH资源的方法如前所述，不再赘述。
进一步地，第二网络设备还可以包括S440中在第二PRACH资源上接收第一网络设备发送的随机接入请求。具体如下所述，不再赘述。
在步骤S440，第一网络设备在第二PRACH资源上向第二网络设备发送随机接入请求。
经过步骤S430，第二PRACH资源与第三PRACH资源在时域位置上已经实现不重叠，因此，在第一网络设备接收UE或其子节点发送的随机接入请求时，若第一网络设备也需要向第二网络设备发送随机接入请求，由于第二PRACH资源与第三PRACH资源在时域位置上已错开时间，可以避免第一网络设备在接收随机接入请求的同时还需发送随机接入请求的情况。
第一网络设备根据第一PRACH资源的配置信息和位置调整信息，确定了第二PRACH资源，并在第二PRACH资源上向第二网络设备发送随机接入请求。第二网络设备若要成功接收第一网络设备发送的随机接入请求，第二网络设备也需确定第二PRACH资源。
作为一种可能的实现方式，第二网络设备可以根据第一PRACH资源的配置信息和第三PRACH资源的配置信息，确定位置调整信息和/或第二PRACH资源。
例如，第二网络设备若为宿主基站，宿主基站可以根据已知的第一PRACH资源的配置信息和第三PRACH资源的配置信息，确定第一PRACH资源和第三PRACH资源在时域的位置和冲突情况，从而确定出位置调整信息和第二PRACH资源。宿主基站可以将位置调整信息发送给第一网络设备，以使第一网络设备确定第二PRACH资源；宿主基站可以直接用确定的第二PRACH资源接收第一网络设备发送的随机接入请求。
又如，第二网络设备若为第一网络设备的上级节点，即，第一网络设备为另一个IAB节点，上级节点可以根据接收的位置调整信息和已知的第一PRACH资源的配置信息，确定第二PRACH资源。上级节点可以从宿主基站或核心网设备接收该位置调整信息。第二网络设备确定第二PRACH资源的方法与步骤S430所述的方法类似，为简洁，在此不再赘述。
再如，第二网络设备若为第一网络设备的上级节点，上级节点可以根据接收的第三PRACH资源的配置信息和已知的第一PRACH资源的配置信息，确定位置调整信息和/或第二PRACH资源。
上级节点接收第三PRACH资源的配置信息的方式可以有以下几种非限制性实现。
在一种可能的实现中，第二网络设备接收第一网络设备的第三PRACH资源的配置信息。具体地，第二网络设备可以接收来自宿主基站的关于下级节点的第三PRACH资源配置，或者第二网络设备接收来自第一网络设备发送的第三PRACH资源配置。
如果第二网络设备可以接收来自宿主基站的关于下级节点的第三PRACH资源配置，则通过第二网络设备的MT接收宿主基站的RRC消息，RRC消息中包含第三PRACH资 源配置。应理解，此时第二网络设备为另一个IAB节点。如果第二网络设备有多个下级节点，则RRC消息中应包含多个下级节点的第三PRACH资源配置。第二网络设备根据第三PRACH资源配置确定冲突时隙以及位置调整信息，具体的方法类似于前述实施例中的方法，不再赘述。
如果第二网络设备接收来自第一网络设备发送的第三PRACH资源配置，则可以通过MAC CE来进行第三PRACH资源配置通知。本申请对具体的MAC CE消息格式不做限定。
作为再一种可能的实现方式，第二PRACH资源可以由第二网络设备的上级节点或宿主基站确定后直接通知该第二网络设备的。也就是第二网络设备直接接收的第二PRACH资源。
通过上述实施例，第一网络设备能够在时隙或符号上调整所配置的第一PRACH资源，并使用调整后的第二PRACH资源进行随机接入，可以避免IAB节点接入链路和回传链路上PRACH资源的冲突而导致回传链路上或接入链路上随机接入资源不可用的情况。通过对回传链路上接入资源的时域位置进行调整，保持回传链路上接入资源可用，解决了IAB节点在接入链路和回传链路上的随机接入资源冲突时的配置问题，避免IAB节点在需要随机接入时而导致等待时间过长的问题。
需要说明的是，由于IAB节点支持终端的接入，也支持其下级节点的接入，当IAB节点与下级节点间的回传链路同IAB节点与上级节点间的回传链路上PRACH资源发生冲突，上述实施例中的方案也可以适用。换句话说，本申请实施例不限定是IAB节点的接入链路和回传链路上PRACH资源存在冲突，也可能是IAB节点的回传链路和回传链路上PRACH资源存在冲突。
下面将结合图5至图8更加详细地描述本申请实施例的一些具体的而非限制性的例子。
应理解，本申请实施例的方法，可以应用于两种PRACH配置资源在一些系统帧上重叠或冲突的场景，也可以应用于两种PRACH资源配置在每个系统帧上有重叠的场景，例如在PRACH配置索引表格中x＝1，y＝0时，根据资源映射规则，在每个系统帧上都有PRACH资源，当需要时分复用的两条链路中的一条链路使用x＝1，y＝0的配置索引时，另一条链路无论怎样设置x和y都无法在所有配置有PRACH资源的时隙上做到时分复用，也就是无法做到使两条链路使用的PRACH资源不重叠。为了更好的理解本申请的技术方案，本申请实施例中以两条链路使用的PRACH资源在每个系统帧上均重叠的情形为例进行说明，但正如上文所述，本申请实施例的方法也可以应用于两条链路的PRACH资源只在部分系统帧上重叠的场景。
图5是本申请一个实施例的通信资源的示意图。图中假定接入链路和回传链路使用相同的波形参数，如子载波间隔。该通信资源对应的PRACH配置索引及其他配置信息如表2所示。在该实施例中，位置调整信息包括时隙偏移量。
需要说明的是，在本申请实施例中，对于时隙和符号的编号均是从#0开始，即第0号时隙(#0)对应第一个时隙，第0号符号(#0)对应第一个符号，依次类推，时隙或符号增加1，时隙或符号的编号在前一个时隙编号的基础上增加1。本申请实施例中，为方便理解，以子载波间隔为60kHz为例，一个系统帧10ms拥有40个时隙，编号由时隙#0至时隙#39，一个时隙0.25ms拥有14个符号，编号由符号#0至符号#13。以下的实施例中 该示例同样适用，为简洁，下述实施例中不再赘述。
如表2所示，示例性的列举PRACH配置索引为127和128及其对应的PRACH配置信息，为描述方便，本申请实施例做如下假定：第一网络设备向UE广播的PRACH配置索引为127，第一网络设备接收上级节点或宿主基站发送的PRACH配置索引为128。也就是说，PRACH配置索引128对应的为第一PRACH资源的配置信息，PRACH配置索引127对应的为第三PRACH资源的配置信息；第一PRACH资源为第二网络设备为第一网络设备配置的初始PRACH资源，第三PRACH资源为第一网络设备为UE或其子节点配置的PRACH资源，第一网络设备可以在第三PRACH资源上接收UE或其子节点发送的随机接入请求。为描述方便，本申请实施例中以第一网络设备为IAB节点为例进行说明，第二网络设备可以为IAB节点的上级节点或宿主基站。
表2 PRACH配置索引(127、128)与对应的PRACH配置信息
Figure PCTCN2020071448-appb-000002
示例性的，该实施例中的具体流程如下。
步骤一：IAB节点可以通过接收上级节点广播的系统消息，或者接收上级节点或宿主基站发送的RRC配置，以获取第一PRACH资源配置。具体而言，IAB节点的MT功能接收上述配置。
步骤二：IAB节点接收上级节点或宿主基站发送的时隙偏移量。
本申请实施例中假设时隙偏移量为-1。具体而言，第二网络设备为IAB节点的上级节点时，该时隙偏移量可以由上级节点发送，也可以由宿主基站发送；第二网络设备为宿主基站时，也就是IAB节点的上级节点是宿主基站，该时隙偏移量由宿主基站发送。该时隙偏移量可以是宿主基站确定的，然后由宿主基站通知IAB节点的上级节点或IAB节点。
步骤三：IAB节点根据接收的第一PRACH资源的配置信息，确定该第一PRACH资源的配置信息所指示的配置有PRACH资源的时隙编号。
IAB节点根据步骤二中接收的时隙偏移量，确定上级节点或宿主基站实际配置的PRACH资源(即第二PRACH资源)的时域位置。
可选地，IAB节点可以将第一PRACH资源的全部资源进行偏移，这时，在该步骤中IAB节点可以不用获取第三PRACH资源所在的时隙。但为了更好的理解本申请实施例的技术方案，在表2和图5中均示出了第三PRACH资源的时隙位置，但应理解，第三PRACH资源的时隙位置的确定在该实施例中是非必须的步骤。
根据表2中第三列信息可知，上述两种PRACH资源配置中，x＝1，y＝0，PRACH资源在每个系统帧上均有重叠；进一步地，根据第四列参数可知，两种PRACH资源(即第 一PRACH资源和第三PRACH资源)在时隙#9、#19、#29、#39上均重叠。如图5所示，在一个系统帧上，第一PRACH资源和第三PRACH资源在时隙的位置如图。
图5中，第一行示出的是PRACH配置索引127对应的第三PRACH资源在一个系统帧内的时隙上的位置，其中，第三PRACH资源配置在时隙slot#9、slot#19、slot#29、slot#39(图中第一行中圆点背景填充的时隙位置)；第二行示出的是PRACH配置索引128对应的第一PRACH资源在一个系统帧内的时隙上的位置，其中第一PRACH资源配置在时隙slot#9、slot#19、slot#29、slot#39(图中第二行斜线背景填充的时隙位置)。
根据时隙偏移量-1，将第二行所示的配置有第一PRACH资源的时隙进行偏移。时隙偏移量为-1，表示将第一PRACH资源所在的时隙向前推移1个时隙，即图2中第二行里，将时隙slot#9、slot#19、slot#29、slot#39上的第一PRACH资源偏移至时隙slot#8、slot#18、slot#28、slot#38(图2第二行圆点背景填充的时隙位置)上。换句话说，时隙slot#8、slot#18、slot#28、slot#38上的PRACH资源即IAB节点确定的第二PRACH资源，也即上级节点为IAB节点实际配置的PRACH资源。应理解，这里偏移量为-1表示向前推移一个时隙仅是一个示例。
因此，结合第一PRACH资源的配置信息和时隙偏移量，在表2的第四列参数中，上级节点为IAB节点配置的存在PRACH资源的时隙编号实际为：8，18，28，38。
应理解，本申请实施例中给出的时隙偏移量为-1仅仅是示例性的，该时隙偏移量还可以是其他整数值，例如时隙偏移量为-2等。
可选地，若上级节点或宿主基站指示了上文提到的系统帧的偏移或指定，则本申请实施例中的时隙偏移量可以与系统帧的指示同时存在，或者是IAB节点可以根据系统帧的偏移量和时隙偏移量指示，共同确定第二PRACH资源的位置。例如，可以先按照系统帧偏移指示将配置有第一PRACH资源的系统帧进行偏移，然后在已经偏移的系统帧内按照时隙偏移量将配置有第一PRACH资源的时隙进行偏移，或者先进行时隙的偏移，再进行系统帧的偏移，本申请实施例不做限定。
可选地，若发送时隙偏移量的第二网络设备为IAB节点的上级节点，则该上级节点可以在确定自身与IAB节点之间的链路的PRACH资源(即第二PRACH资源)之前，接收宿主基站或核心网设备发送的该时隙偏移量指示，或者接收下级IAB节点的接入链路PRACH资源配置。该上级节点确定自身接收IAB节点发送的随机接入请求的资源位置(即第二PRACH资源)的方法与IAB节点确定第二PRACH资源的方法可以相同。
图5中给出的实施例中，第一PRACH资源与第三PRACH资源在时域上完全重叠，因此IAB节点可以根据时隙偏移量将配置有第一PRACH资源的所有时隙进行偏移，在其他一些实施例中，若第一PRACH资源与第三PRACH资源在时隙上部分重叠，则IAB节点可以根据时隙偏移量将所有配置有第一PRACH资源的时隙进行偏移，方法同图5所示的实施例中的方法类似，也可以仅将存在冲突的时隙进行偏移，下面以表3和图6中的情形为例进行描述。
图6是本申请另一个实施例的通信资源的示意图。该通信资源对应的PRACH配置索引及其他配置信息如表3所示。在该实施例中，位置调整信息包括时隙偏移量，该时隙偏移量仅对第一PRACH资源与第三PRACH资源存在冲突的时隙有效，在该实施例中，时隙偏移量仍假定为-1。
表3 PRACH配置索引(0、1)与对应的PRACH配置信息
Figure PCTCN2020071448-appb-000003
如表3所示，示例性的列举PRACH配置索引为0和1及其对应的PRACH配置信息。为描述方便，本申请实施例做如下假定：第一网络设备向UE广播的PRACH配置索引为0，第一网络设备接收上级节点或宿主基站发送的PRACH配置索引为1。也就是说，PRACH配置索引1对应的为第一PRACH资源的配置信息，PRACH配置索引0对应的为第三PRACH资源的配置信息；第一PRACH资源为第二网络设备为第一网络设备配置的初始PRACH资源，第三PRACH资源为第一网络设备为UE或其子节点配置的PRACH资源，第一网络设备可以在第三PRACH资源上接收UE或其子节点发送的随机接入请求。为描述方便，本申请实施例中以第一网络设备为IAB节点为例进行说明，第二网络设备可以为IAB节点的上级节点或宿主基站。
示例性的，该实施例中的具体流程中，步骤一至步骤三与图5示出的实施例中的步骤一至步骤三类似，不同的是，在图6所示的实施例的步骤三中，IAB节点确定第二PRACH资源的时域位置时，仅将存在冲突的时隙进行偏移，下面结合表3和图6进行详细描述。
由于本申请实施例中，时隙偏移量仅对第一PRACH资源与第三PRACH资源存在冲突的时隙有效，因此，IAB节点需要获取该冲突时隙。
可选地，IAB节点可以接收上级节点或宿主基站发送的冲突时隙的信息，例如冲突时隙编号索引。该冲突时隙的信息可以与时隙偏移量一同被发送至IAB节点，也可以与时隙偏移量分开被发送至IAB节点。
可选地，IAB节点可以自行确定冲突时隙的信息。例如，IAB节点可以根据其广播的第三PRACH资源配置索引，确定第三PRACH资源的配置信息，也就确定了存在第三PRACH资源的时隙位置，IAB节点根据上级节点发送的第一PRACH资源的配置信息，可以确定配置有第一PRACH资源的时隙位置，进而可以确定第一PRACH资源和第三PRACH资源存在冲突的时隙。为了更好的理解本申请的实施例的技术方案，本申请实施例以IAB节点自行确定冲突时隙为例，对本申请实施例的技术方案进行描述。
在表3和图6中均示出了第三PRACH资源的时隙位置，根据表3中第四列参数可知，两种PRACH资源(即第一PRACH资源和第三PRACH资源)在时隙#19、#39上存在冲突(或重叠)。如图6所示，在一个系统帧上，第一PRACH资源和第三PRACH资源在时隙的位置如图。
图6中，第一行示出的是PRACH配置索引0对应的第三PRACH资源在一个系统帧内的时隙上的位置，其中，第三PRACH资源配置在时隙slot#4、slot#9、slot#14、slot#19、slot#24、slot#29、slot#34、slot#39(图6中第一行中圆点背景填充的时隙位置)；第二行示出的是PRACH配置索引1对应的第一PRACH资源在一个系统帧内的时隙上的位置，其中第一PRACH资源配置在时隙slot#3、slot#7、slot#11、slot#15、slot#23、slot#27、slot#31、slot#35(图6中第二行圆点背景填充的时隙位置)，以及slot#19、slot#39(图6中第二行斜线背景填充的时隙位置)。第一PRACH资源与第三PRACH资源在slot#19、slot#39上存在冲突。
根据时隙偏移量-1，将第二行所示的配置有第一PRACH资源的冲突时隙进行偏移。时隙偏移量为-1，表示将第一PRACH资源所在的时隙向前推移1个时隙，即图2中第二行里，将时隙slot#19、slot#39上的第一PRACH资源偏移至时隙slot#18、slot#38(图2第二行圆点背景填充的时隙位置)上。第二PRACH资源包括第一PRACH资源偏移后的的资源和未进行偏移的第一PRACH资源。换句话说，slot#3、slot#7、slot#11、slot#15、slot#18、slot#23、slot#27、slot#31、slot#35、slot#38(图6中第二行所有由圆点背景填充的时隙位置)上的PRACH资源即IAB节点确定的第二PRACH资源，也即上级节点为IAB节点实际配置的PRACH资源。
因此，结合第一PRACH资源的配置信息和时隙偏移量，在表3的第四列参数中，上级节点为IAB节点配置的存在PRACH资源的时隙编号实际为：3，7，11，15，18，23，27，31，35，38。
应理解，本申请实施例中给出的时隙偏移量为-1仅仅是示例性的，该时隙偏移量还可以是其他整数值，例如时隙偏移量为-2等。-1表示向前推移一个时隙也是示例性的，也可以表示向后推移，具体是向前还是向后推移本申请不做限定。
可选地，若上级节点或宿主基站指示了上文提到的系统帧的偏移或指定，则本申请实施例中的时隙偏移量可以与系统帧的指示同时存在，或者是IAB节点可以根据系统帧的偏移量和时隙偏移量指示，共同确定第二PRACH资源的位置。例如，若两条链路的PRACH资源在每个系统帧上均冲突，则可以根据时隙偏移量确定第二PRACH资源的位置；若两条链路的PRACH资源在一些系统帧上冲突，则可以仅根据系统帧偏移量进行偏移，或根据系统帧偏移量和时隙偏移量进行偏移，或者仅根据时隙偏移量进行偏移。
可选地，若发送时隙偏移量的第二网络设备为IAB节点的上级节点，则该上级节点可以在确定自身与IAB节点之间的链路的PRACH资源(即第二PRACH资源)之前，接收宿主基站发送的该时隙偏移量指示，和冲突时隙信息或第三PRACH资源的配置信息。该上级节点确定自身接收IAB节点发送的随机接入请求的资源位置(即第二PRACH资源)的方法与IAB节点确定第二PRACH资源的方法可以相同。
作为另一种可能的实现方式，上级节点可以不发送时隙偏移量信息，而仅指示IAB节点哪些时隙或系统帧上的第一PRACH资源不可用。以表3中内容为例，宿主基站或上级节点指示IAB节点使用PRACH配置索引1对应的PRACH资源后，同时指示IAB节点时隙#19和时隙#39上的PRACH资源不可用，IAB节点可以使用除时隙#19和时隙#39之外的其他时隙上的第一PRACH资源。上级节点指示不可用系统帧的情况与之类似，在此不再举例说明。冲突时隙不用于第一网络设备在回传链路上的PRACH资源也可以是协议 定义的，而不需要通过协议显式通知。
上述实施例中，通过引入时隙级别的偏移，使IAB节点在第三PRACH资源接收UE或其子节点发送的随机接入请求时，不会出现向上级节点或宿主接站发送随机接入请求的情况，也就是使IAB节点在接收随机接入请求的时隙与发送随机接入请求的时隙不重叠，这样可以避免IAB节点在有PRACH资源的时隙上发生资源冲突，进而满足IAB节点的半双工约束。
以上两个实施例是在时隙级别上使第一PRACH资源与第三PRACH资源在时域位置上不冲突，还可以在符号级别上使第一PRACH资源与第三PRACH资源在时域位置上不冲突，下面以表4和图7为例进行详细描述。
图7是本申请又一个实施例的通信资源的示意图。图7中接入链路和回传链路假定使用相同的波形参数，如子载波间隔。该通信资源对应的PRACH配置索引及其他配置信息如表4所示。在该实施例中，位置调整信息包括符号偏移量。
表4 PRACH配置索引(102、78)与对应的PRACH配置信息
Figure PCTCN2020071448-appb-000004
如表4所示，示例性的列举PRACH配置索引为78和102及其对应的PRACH配置信息，为描述方便，本申请实施例做如下假定：第一网络设备向UE广播的PRACH配置索引为78，第一网络设备接收上级节点或宿主基站发送的PRACH配置索引为102。也就是说，PRACH配置索引102对应的为第一PRACH资源的配置信息，PRACH配置索引78对应的为第三PRACH资源的配置信息；第一PRACH资源为第二网络设备为第一网络设备配置的初始PRACH资源，第三PRACH资源为第一网络设备为UE或其子节点配置的PRACH资源，第一网络设备可以在第三PRACH资源上接收UE或其子节点发送的随机接入请求。为描述方便，本申请实施例中以第一网络设备为IAB节点为例进行说明，第二网络设备可以为IAB节点的上级节点或宿主基站。
示例性的，该实施例中的具体流程如下。
步骤一：IAB节点可以通过接收上级节点广播的系统消息，或者接收上级节点或宿主基站发送的RRC配置，以获取第一PRACH资源的配置信息。具体而言，IAB节点的MT功能接收上述配置。
步骤二：IAB节点接收上级节点或宿主基站发送的符号偏移量，本申请实施例中假设符号偏移量为-8。具体而言，第二网络设备为IAB节点的上级节点时，该符号偏移量可以由上级节点发送，也可以由宿主基站发送；第二网络设备为宿主基站时，也就是IAB节点 的上级节点是宿主基站，该符号偏移量由宿主基站发送。该时隙偏移量可以是宿主基站确定的，然后由宿主基站通知IAB节点的上级节点或IAB节点。
步骤三：IAB节点根据接收的第一PRACH资源的配置信息，确定该第一PRACH资源的配置信息所指示的配置有PRACH资源的时隙编号。IAB节点根据步骤二中接收的符号偏移量，确定上级节点或宿主基站实际配置的PRACH资源(即第二PRACH资源)的时域位置。
可选地，IAB节点可以将第一PRACH资源的全部资源均进行偏移，这时，在该步骤中IAB节点可以不用获取第三PRACH资源所在的时隙或符号。但为了更好的理解本申请实施例的技术方案，在表4和图7中均示出了第三PRACH资源的符号位置，但应理解，第三PRACH资源的符号位置的确定在该实施例中是非必须的步骤。
根据表4中第三列信息可知，上述两种PRACH资源配置中，x＝1，y＝0，PRACH资源在每个系统帧上均有重叠；进一步地，根据第四列参数可知，两种PRACH资源(即第一PRACH资源和第三PRACH资源)在时隙#23、#27、#31、#35、#39上均重叠；进一步地，根据第五列至第八列的参数可知，在上述重叠的任意一个时隙中，第一PRACH资源占用符号#8至符号#13，共6个符号，也就是占用3个连续的PRACH时机，第三PRACH资源占用符号#7至符号#12，共6个符号，也是占用3个连续的PRACH时机。如图7所示，在一个时隙上，第一PRACH资源和第三PRACH资源在符号上的位置如图。
图7中，第一行或第二行示出的是PRACH配置索引102对应的第一PRACH资源在一个重叠时隙内的符号上的位置，其中，第一PRACH资源配置在符号#8至符号#13(图7中左侧第一行或第二行中圆点背景填充的符号位置)；第三行或第四行示出的是PRACH配置索引78对应的第三PRACH资源在一个重叠时隙内的符号上的位置，其中第三PRACH资源配置在符号#7至符号#12(图7中左边第三行或第四行圆点背景填充的符号位置)，可以看出第一PRACH资源和第三PRACH资源在符号#8至符号#12上冲突。
需要说明的是，图7中第一行示出的是上级节点中的DU功能为IAB节点配置的PRACH资源在符号上的位置，第二行示出的是IAB节点中的MT功能接收的PRACH资源在符号上的位置，上级节点接收随机接入请求所使用的PRACH资源与IAB节点向上级节点发送随机接入请求所使用的PRACH资源相同，均为表4中PRACH配置索引102对应的第一PRACH资源；同理，图7中第三行示出的是IAB节点中的DU功能为UE配置的PRACH资源在符号上的位置，第四行示出的是UE接收的PRACH资源在符号上的位置，IAB节点接收UE发送的随机接入请求所使用的PRACH资源与UE向IAB节点发送随机接入请求所使用的PRACH资源相同，均为表4中PRACH配置索引78对应的第三PRACH资源。为方便理解，下面仅以IAB节点的MT功能接收上级节点配置的第一PRACH资源和IAB节点的DU功能为UE配置的第三PRACH资源在符号上的位置为例进行描述。
根据符号偏移量-8，将第二行所示的配置有第一PRACH资源的符号进行偏移。符号偏移量为-8，表示将第一PRACH资源所在的符号向前推移8个符号，即图7中右侧第二行里，将符号#8至符号#13(图7右侧第二行斜线背景填充的时隙位置)上的第一PRACH资源一一对应的偏移至符号#0至符号#5(图7右侧第二行圆点背景填充的时隙位置)上。换句话说，符号#0至符号#5上的PRACH资源即IAB节点确定的第二PRACH资源，也即上级节点为IAB节点实际配置的PRACH资源。
因此，结合第一PRACH资源的配置信息和符号偏移量，在表4的第五列参数中，上级节点为IAB节点配置的存在PRACH资源的符号起始编号实际为：0。
应理解，本申请实施例中给出的符号偏移量为-8仅仅是示例性的，该符号偏移量还可以是其他整数值。
上述实施例中，第一PRACH资源和第三PRACH资源在时隙上均冲突，因此可将所有时隙中存在第一PRACH资源的符号进行偏移，在其他一些实施例中，若第一PRACH资源和第三PRACH资源仅在部分时隙上有重叠/冲突，则该符号偏移量可以仅对PRACH资源存在冲突的时隙有效。示例性的，可以将冲突时隙中存在第一PRACH资源的符号按照符号偏移量进行偏移，将不冲突时隙中的第一PRACH资源不进行偏移，则第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。冲突时隙可以通过上级节点指示，也可以由IAB自行确定。
可选地，位置调整信息可以包括PRACH时机的起始符号索引的偏移量。例如，可以根据该PRACH时机的起始符号索引的偏移量，将PRACH时机整体进行偏移，而无需将每个冲突的符号进行单独偏移。
在一些实施例中，可能会出现第一PRACH资源所在的符号移出当前时隙的情况，为了不对其他时隙上的资源造成影响，可以将移出当前时隙的符号或PRACH时机视作无效。如图8所示的通信资源的示意图，第一行示出的是移位前PRACH资源所在的符号位置，占用符号#8至符号#13，若符号偏移量为2，则需将符号#8至符号#13上的PRACH资源偏移至当前时隙的符号#10至符号#13、以及下一个时隙的符号#0和符号#1上，在这种情况下，可以将偏移至下一个时隙的符号#0和符号#1上的PRACH资源视为无效，而当前时隙中，PRACH资源有效的时机的数量由3个变为2个。
上述实施例中，通过引入符号级别的偏移，使IAB节点在第三PRACH资源接收UE或其子节点发送的随机接入请求时，不会出现向上级节点或宿主接站发送随机接入请求的情况，也就是使IAB节点在接收随机接入请求的符号与发送随机接入请求的符号不重叠，这样可以避免IAB节点在有PRACH资源的符号上发生资源冲突，进而满足IAB节点的半双工约束。
上述实施例中是将符号的第一PRACH资源进行偏移，以使第一PRACH资源与第三PRACH资源在时域位置上不冲突，在一些实施例中，若配置有第一PRACH资源在一个时隙中为占满的或前导码为长格式的，则在一个时隙中通过符号偏移的方法效果是有限的。例如，长格式的前导码最大可以占用6个符号，在一个时隙中若存在两个长格式的随机接入时机，则会占用14个符号中的12个符号，在这种情况下，本申请实施例还可以通过指示IAB节点在有效的符号上使用PRACH资源的方式，使第一PRACH资源与第三PRACH资源在时域位置上不冲突。下面结合表5和图9进行详细描述。
表5 PRACH配置索引(166、167)与对应的PRACH配置信息
Figure PCTCN2020071448-appb-000005
如表5所示，示例性的列举PRACH配置索引为166和167及其对应的PRACH配置信息，为描述方便，本申请实施例做如下假定：第一网络设备的接入链路和回传链路使用相同的波形参数，如子载波间隔；第一网络设备向UE广播的PRACH配置索引为166，第一网络设备接收上级节点或宿主基站发送的PRACH配置索引为167。也就是说，PRACH配置索引167对应的为第一PRACH资源的配置信息，PRACH配置索引166对应的为第三PRACH资源的配置信息；第一PRACH资源为第二网络设备为第一网络设备配置的初始PRACH资源，第三PRACH资源为第一网络设备为UE或其子节点配置的PRACH资源，第一网络设备可以在第三PRACH资源上接收UE或其子节点发送的随机接入请求。为描述方便，本申请实施例中以第一网络设备为IAB节点为例进行说明，第二网络设备可以为IAB节点的上级节点或宿主基站。
示例性的，该实施例中具体流程如下。
步骤一：IAB节点可以通过接收上级节点广播的系统消息，或者接收上级节点或宿主基站发送的RRC配置，以获取第一PRACH资源的配置信息。具体而言，IAB节点的MT功能接收上述配置。
步骤二：IAB节点接收上级节点或宿主基站配置的符号索引，该符号索引用于指示IAB节点只在符号索引指示有效的PRACH时机上使用PRACH资源。在本申请实施例中，假定符号索引为(1，2，3)，指示的是一个时隙内有效的PRACH时机。
为了更好的理解本申请实施例的技术方案，在表5和图8中均示出了第三PRACH资源的符号位置，但应理解，第三PRACH资源的符号位置的确定在该实施例中是非必须的步骤。
根据表5中第三列信息可知，上述两种PRACH资源配置中，x＝1，y＝0，PRACH资源在每个系统帧上均有重叠；进一步地，根据第四列参数可知，两种PRACH资源(即第一PRACH资源和第三PRACH资源)在时隙#4、#9、#14、#19、#24、#29、#34、#39上均重叠；进一步地，根据第五列至第八列的参数可知，在上述重叠的任意一个时隙中，第一PRACH资源占用符号#0至符号#13，共14个符号，也就是占用7个连续的PRACH时机，第三PRACH资源占用符号#8至符号#13，共6个符号，也是占用3个连续的PRACH时机。如图9所示，在一个时隙上，第一PRACH资源和第三PRACH资源在符号上的位置如图。
图9中，第一行示出的是PRACH配置索引167对应的第一PRACH资源在一个重叠 时隙内的符号上的位置，其中，第一PRACH资源配置在符号#0至符号#13；第二行示出的是PRACH配置索引166对应的第三PRACH资源在一个重叠时隙内的符号上的位置，其中第三PRACH资源配置在符号#8至符号#13(图9中第二行圆点背景填充的符号位置)，可以看出第一PRACH资源和第三PRACH资源在符号#8至符号#13上冲突。
根据符号索引指示的有效PRACH时机为(1，2，3)，IAB节点可以只使用图9中第一行所示的前3个PRACH时机进行映射，即RO91、RO92和RO93，而不使用重叠时隙内的符号#6至符号#13。换句话说，符号#0至符号#5上的PRACH资源即IAB节点确定的第二PRACH资源，也即上级节点为IAB节点实际配置的PRACH资源。
应理解，本申请实施例给出的符号索引指示(1，2，3)仅仅是示例性的，该符号索引还可以是其他数值，例如(2，3)或(5)等。
还应理解，本申请实施例中符号索引指示的(1，2，3)是指一个时隙内的前3个PRACH时机有效，若符号索引指示(5)，则指示一个时隙内的第5个PRACH时机有效。
作为另一种可能的实现方式，符号索引还可以指示一个时隙内失效的PRACH时机，则IAB节点可以使用除符号索引指示的PRACH时机之外的其他符号。
上述实施例中，第一PRACH资源和第三PRACH资源在时隙上均冲突，因此可将符号索引指示的有效的PRACH时机应用于所有时隙，在其他一些实施例中，若第一PRACH资源和第三PRACH资源仅在部分时隙上有重叠/冲突，则该符号索引可以仅对PRACH资源存在冲突的时隙有效。示例性的，IAB节点可以使用冲突时隙中的有效的PRACH时机，还可以使用不冲突时隙中的第一PRACH资源，则第二PRACH资源包括冲突时隙中有效第一PRACH资源和其他不冲突时隙中的第一PRACH资源。冲突时隙可以通过上级节点指示，也可以由IAB自行确定。
作为又一种可能的实现方式，符号索引可以指示有效的符号或失效的符号或可用符号索引或不可用符号索引，而非PRACH时机，具体的实现方式与符号索引指示有效或失效的PRACH时机的方式相同，在此不再赘述。
类似地，位置调整信息还可以指示配置有第一PRACH资源的时隙中，哪些时隙是有效的，则IAB节点可以只使用有效的时隙上的第一PRACH资源。
在另一种可能的实现中，位置调整信息包括偏移类型指示。偏移类型指示用于指示偏移量指示的是时隙偏移，还是符号偏移。针对前述实施例中不同的偏移方法，有必要使得第一节点知道是基于时隙偏移还是基于符号进行偏移，以保证PRACH资源配置的一致性。
上述实施例中，PRACH资源符号索引指示IAB节点使用有效的PRACH资源，该符号索引指示的有效的符号或PRACH时机上，第一PRACH资源与第三PRACH资源不冲突，从而使IAB节点在接收随机接入请求的符号与发送随机接入请求的符号不重叠，这样可以避免IAB节点在有PRACH资源的符号上发生资源冲突，进而满足IAB节点的半双工约束。
上文结合图1至图9详细的描述了本申请实施例的方法实施例，下面结合图10至图15，详细描述本申请实施例的装置实施例。应理解，方法实施例的描述与装置实施例的描述相互对应，因此，未详细描述的部分可以参见前面方法实施例。
图10是本申请实施例提供的通信装置的示意性结构图。图10中的通信装置1000可以是上文提及的第一网络设备，可以是图1或图2中的中继站120的一个具体的例子，例 如IAB子节点。图10所示的装置可以用于实现上文中的由第一网络设备执行的方法，具体地，该通信装置1000可以用于执行图4的方法，并且可以具体实现图5至图9所示的实施例，为避免冗余，不再重复描述。
图10所示的通信装置1000包括收发单元1010和处理单元1020。
收发单元1010，用于接收第一物理随机接入信道PRACH资源的配置信息。
收发单元1010，还用于接收位置调整信息，所述位置调整信息用于指示在时隙或符号上调整所述第一PRACH资源中的至少一部分PRACH资源的位置。
处理单元1020，用于根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源。
收发单元1010，还用于在所述第二PRACH资源上向第二网络设备发送随机接入请求。
可选地，所述位置调整信息包括时隙或符号的偏移量，所述处理单元1020具体用于将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源。
可选地，所述第二PRACH资源是所述第一PRACH资源中的全部资源按照所述时隙或符号的偏移量进行偏移之后得到的。
可选地，所述位置调整信息还包括目标时隙或符号的位置信息，所述处理单元1020具体用于将所述目标时隙或符号上的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
可选地，所述处理单元1020具体用于确定所述第一PRACH资源与第三PRACH资源在时域上冲突的目标时隙或符号，所述第三PRACH资源用于所述第一网络设备接收随机接入请求；所述处理单元1020具体用于将所述目标时隙或符号中的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
可选地，所述位置调整信息包括时隙和/或符号索引，所述时隙和/或符号索引用于指示所述第一PRACH资源中的至少一部分PRACH资源有效，所述处理单元1020具体用于确定所述时隙或符号索引指示的所述第一PRACH资源中的至少一部分PRACH资源为所述第二PRACH资源。
可选地，所述第一PRACH资源的配置信息承载于系统广播消息或无线资源控制配置消息中。
图11是本申请实施例提供的通信装置的示意性结构图。图11所示的通信装置1100可对应于前文描述的第一网络设备。通信装置1100包括：处理器1102。在本申请的实施例中，处理器1102用于对该第一网络设备的动作进行控制管理，例如，处理器1102用于支持第一网络设备执行前述实施例中图5到图9所示的方法或操作或功能，以及用于支持前述实施例中接收位置调整信息，并根据位置调整信息确定第二PRACH资源。可选的，第一网络设备还可以包括：存储器1101和通信接口1103；处理器1102、通信接口1103以及存储器1101可以相互连接或者通过总线1104相互连接。其中，通信接口1103用于支持该第一网络设备进行通信，存储器1101用于存储第一网络设备的程序代码和数据。处理器1102调用存储器1101中存储的代码进行控制管理。该存储器1101可以跟处理器 耦合在一起，也可以不耦合在一起。
其中，处理器1102可以是中央处理器单元，通用处理器，数字信号处理器，专用集成电路，现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，数字信号处理器和微处理器的组合等等。总线1104可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图11中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
图12是本申请实施例提供的通信装置的示意性结构图。图12中的通信装置1200可以是上文提及的第二网络设备，可以是图1或图2中的宿主基站110的一个具体的例子。图12所示的装置可以用于实现上文中的由第二网络设备执行的方法，具体地，该通信装置1200可以用于执行图4的方法，并且可以具体实现图5至图9所示的实施例，为避免冗余，不再重复描述。
图12所示的通信装置1200包括收发单元1210和处理单元1220。
处理单元1220用于获取位置调整信息，所述位置调整信息用于指示在时隙或符号上调整第一物理随机接入信道PRACH资源中的至少一部分PRACH资源的位置。
收发单元1210用于向第一网络设备发送所述位置调整信息。
可选地，所述通信装置为宿主基站。
可选地，所述处理单元1220具体用于根据所述第一PRACH资源的配置信息和第三PRACH资源的配置信息确定所述位置调整信息和/或第二PRACH资源，所述第三PRACH资源用于所述第一网络设备接收随机接入请求，所述第二PRACH资源用于接收所述第一网络设备发送的随机接入请求。
可选地，所述位置调整信息包括以下信息中的至少一种：时隙的偏移量，符号的偏移量，时隙索引或符号索引。
可选地，所述收发单元1210用于向第一网络设备发送第三PRACH资源的配置信息。
可选地，所述收发单元1210用于向第一网络设备的上级节点发送第三PRACH资源的配置信息。
可选地，所述收发单元1210用于向第一网络设备发送所述位置调整信息。
可选地，所述收发单元1210还可以用于向第一网络设备的上级节点发送所述位置调整信息。
可选地，所述收发单元1210具体用于通过F1AP接口或无线资源控制RRC消息或者介质访问控制控制元素MAC CE向所述第一网络设备发送所述位置调整信息。
图13是本申请实施例提供的通信装置的示意性结构图。图13所示的通信装置1300可对应于前文描述的第二网络设备为宿主基站。通信装置1300包括：处理器1302。在本申请的实施例中，处理器1302用于对该第二网络设备的动作进行控制管理，例如，处理器1302用于支持第二网络设备执行前述实施例中图5到图9所示的方法或操作或功能，以及用于支持前述实施例中第二网络设备获取位置调整信息，或者确定第二PRACH资源。可选的，第二网络设备还可以包括：存储器1301和通信接口1303；处理器1302、通信接 口1303以及存储器1301可以相互连接或者通过总线1304相互连接。其中，通信接口1303用于支持该第二网络设备进行通信，存储器1301用于存储第二网络设备的程序代码和数据。处理器1302调用存储器1301中存储的代码进行控制管理。该存储器1301可以跟处理器耦合在一起，也可以不耦合在一起。
其中，处理器1302可以是中央处理器单元，通用处理器，数字信号处理器，专用集成电路，现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，数字信号处理器和微处理器的组合等等。总线1304可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图13中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
图14是本申请实施例提供的通信装置的示意性结构图。图14中的通信装置1400可以是上文提及的第二网络设备，可以是第一网络设备的上级节点的一个具体的例子，例如另一个IAB节点。图14所示的装置可以用于实现上文中的由第二网络设备执行的方法，具体地，该通信装置1400可以用于执行图4的方法，并且可以具体实现图5至图9所示的实施例，为避免冗余，不再重复描述。
图14所示的通信装置1400包括收发单元1410和处理单元1420。
处理单元1420用于获取位置调整信息，所述位置调整信息用于指示在时隙或符号上调整第一物理随机接入信道PRACH资源中的至少一部分PRACH资源的位置；
收发单元1410用于向第一网络设备发送所述位置调整信息。
可选地，通信装置为所述第一网络设备的上级节点。
可选地，所述处理单元1420具体用于根据所述第一PRACH资源的配置信息和第三PRACH资源的配置信息确定所述位置调整信息，所述第三PRACH资源用于所述第一网络设备接收随机接入请求；所述收发单元1410具体用于通过宿主基站向所述第一网络设备发送所述位置调整信息，或者所述收发单元1410具体用于直接向所述第一网络设备发送所述位置调整信息。
可选地，所述收发单元1410还用于接收宿主基站或所述第一网络设备发送的所述第三PRACH资源的配置信息。
可选地，所述收发单元1410具体用于接收宿主基站或核心网设备发送的所述位置调整信息。
可选地，所述收发单元1410具体用于通过空口转发宿主基站或核心网设备发送的所述位置调整信息，或者所述收发单元1410具体用于通过空口向所述第一网络设备发送所述位置调整信息。
可选地，所述位置调整信息包括以下信息中的至少一种：时隙的偏移量，符号的偏移量，时隙索引或符号索引。
可选地，所述处理单元1420还用于根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源，所述第二PRACH资源用于接收所述第一网络设备发送的随机接入请求。
可选地，所述位置调整信息包括时隙或符号的偏移量，所述处理单元1420具体用于将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源。
可选地，所述位置调整信息还包括目标时隙或符号的位置信息，所述处理单元1420具体用于将所述目标时隙或符号上的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
可选地，所述处理单元1420具体用于确定所述第一PRACH资源与第三PRACH资源在时域上冲突的目标时隙或符号，所述第三PRACH资源用于所述第一网络设备接收随机接入请求；所述处理单元1420具体用于将所述目标时隙或符号中的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
可选地，所述位置调整信息包括时隙和/或符号索引，所述时隙和/或符号索引用于指示所述第一PRACH资源中的至少一部分PRACH资源有效，所述处理单元1420具体用于确定所述时隙和/或符号索引指示的所述第一PRACH资源中的至少一部分PRACH资源为所述第二PRACH资源。
可选地，所述收发单元1410具体用于通过F1AP接口或无线资源控制RRC消息或者介质访问控制控制元素MAC CE向所述第一网络设备发送所述位置调整信息。
图15是本申请实施例提供的通信装置的示意性结构图。图15所示的通信装置1500可对应于前文描述的第二网络设备为第一网络设备的上级节点。通信装置1500包括：处理器1502。在本申请的实施例中，处理器1502用于对该第二网络设备的动作进行控制管理，例如，处理器1502用于支持第二网络设备执行前述实施例中图5到图9所示的方法或操作或功能，以及用于支持前述实施例中第二网络设备获取位置调整信息，或者确定第二PRACH资源。可选的，第二网络设备还可以包括：存储器1501和通信接口1503；处理器1502、通信接口1503以及存储器1501可以相互连接或者通过总线1504相互连接。其中，通信接口1503用于支持该第二网络设备进行通信，存储器1501用于存储第二网络设备的程序代码和数据。处理器1502调用存储器1501中存储的代码进行控制管理。该存储器1501可以跟处理器耦合在一起，也可以不耦合在一起。
其中，处理器1502可以是中央处理器单元，通用处理器，数字信号处理器，专用集成电路，现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，数字信号处理器和微处理器的组合等等。总线1504可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图15中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可 以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (66)

  1. 一种随机接入资源配置方法，其特征在于，包括：
    第一网络设备接收第一物理随机接入信道PRACH资源的配置信息；
    所述第一网络设备接收位置调整信息，所述位置调整信息用于指示调整所述第一PRACH资源中的至少一部分PRACH资源的位置；
    所述第一网络设备根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源；
    所述第一网络设备在所述第二PRACH资源上向第二网络设备发送随机接入请求。
  2. 根据权利要求1所述的方法，其特征在于，所述位置调整信息包括时隙或符号的偏移量。
  3. 根据权利要求1或2所述的方法，其特征在于，所述位置调整信息包括系统帧偏移量。
  4. 根据权利要求2所述的方法，其特征在于，所述第一网络设备根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源，包括：
    所述第一网络设备将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源。
  5. 根据权利要求3所述的方法，其特征在于，所述第二PRACH资源是所述第一PRACH资源中的至少一部分PRACH资源按照所述系统帧偏移量进行偏移之后得到的。
  6. 根据权利要求3所述的方法，其特征在于，所述第二PRACH资源是所述第一PRACH资源中的至少一部分PRACH资源按照所述系统帧偏移量和所述时隙的偏移量进行偏移之后得到的。
  7. 根据权利要求2至6中任一项所述的方法，其特征在于，所述时隙的偏移量为正数或负数。
  8. 根据权利要求1至7中任一项所述的方法，其特征在于，所述位置调整信息还包括周期，所述周期用于指示所述第一网络设备使用所述第二PRACH资源的时间间隔。
  9. 根据权利要求1至8中任一项所述的方法，其特征在于，所述第一网络设备接收位置调整信息，包括：
    所述第一网络设备通过F1接口应用协议或无线资源控制RRC消息或者介质访问控制元素MAC CE接收所述位置调整信息。
  10. 根据权利要求4所述的方法，其特征在于，所述第二PRACH资源是所述第一PRACH资源中的全部资源按照所述时隙或符号的偏移量进行偏移之后得到的。
  11. 根据权利要求4所述的方法，其特征在于，所述位置调整信息还包括目标时隙或符号的位置信息，
    所述第一网络设备将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源，包括：
    将所述目标时隙或符号上的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资 源。
  12. 根据权利要求4或10所述的方法，其特征在于，所述第一网络设备将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源，包括：
    所述第一网络设备确定所述第一PRACH资源与第三PRACH资源在时域上冲突的目标时隙或符号，所述第三PRACH资源用于所述第一网络设备接收随机接入请求；
    将所述目标时隙或符号中的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
  13. 根据权利要求1至12中任一项所述的方法，其特征在于，所述位置调整信息包括时隙和/或符号索引，所述时隙和/或符号索引用于指示所述第一PRACH资源中的至少一部分PRACH资源有效，
    所述第一网络设备根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源，包括：
    所述第一网络设备确定所述时隙和/或符号索引指示的所述第一PRACH资源中的至少一部分PRACH资源为所述第二PRACH资源。
  14. 根据权利要求1至13中任一项所述的方法，其特征在于，所述第一PRACH资源的配置信息承载于系统广播消息或无线资源控制配置消息中。
  15. 一种随机接入资源配置方法，其特征在于，包括：
    第二网络设备获取位置调整信息，所述位置调整信息用于指示调整第一物理随机接入信道PRACH资源中的至少一部分PRACH资源的位置；
    所述第二网络设备向第一网络设备发送所述位置调整信息。
  16. 根据权利要求15所述的方法，其特征在于，所述第二网络设备为宿主基站，
    所述第二网络设备获取位置调整信息，包括：
    所述第二网络设备根据所述第一PRACH资源的配置信息和第三PRACH资源的配置信息确定所述位置调整信息和/或第二PRACH资源，所述第三PRACH资源用于所述第一网络设备接收随机接入请求，所述第二PRACH资源用于接收所述第一网络设备发送的随机接入请求。
  17. 根据权利要求15所述的方法，其特征在于，所述第二网络设备为所述第一网络设备的上级节点，
    所述第二网络设备获取位置调整信息，包括：
    所述第二网络设备根据所述第一PRACH资源的配置信息和第三PRACH资源的配置信息确定所述位置调整信息，所述第三PRACH资源用于所述第一网络设备接收随机接入请求；
    所述第二网络设备向第一网络设备发送所述位置调整信息，包括：
    所述第二网络设备通过宿主基站向所述第一网络设备发送所述位置调整信息，或者所述第二网络设备直接向所述第一网络设备发送所述位置调整信息。
  18. 根据权利要求17所述的方法，其特征在于，还包括：
    所述第二网络设备接收所述宿主基站或所述第一网络设备发送的所述第三PRACH资 源的配置信息。
  19. 根据权利要求15所述的方法，其特征在于，所述第二网络设备为所述第一网络设备的上级节点，
    所述第二网络设备获取位置调整信息，包括：
    所述第二网络设备接收宿主基站或核心网设备发送的所述位置调整信息。
  20. 根据权利要求17至19中任一项所述的方法，其特征在于，所述第二网络设备向第一网络设备发送位置调整信息，包括：
    所述第二网络设备通过空口转发宿主基站或核心网设备发送的所述位置调整信息，或者所述第二网络设备通过空口向所述第一网络设备发送所述位置调整信息。
  21. 根据权利要求15至20中任一项所述的方法，其特征在于，所述位置调整信息包括以下信息中的至少一种：
    时隙的偏移量，符号的偏移量，时隙索引或符号索引。
  22. 根据权利要求15至21中任一项所述的方法，其特征在于，所述位置调整信息包括系统帧偏移量。
  23. 根据权利要求17至22中任一项所述的方法，其特征在于，还包括：
    所述第二网络设备根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源，所述第二PRACH资源用于接收所述第一网络设备发送的随机接入请求。
  24. 根据权利要求23所述的方法，其特征在于，所述位置调整信息包括时隙或符号的偏移量，
    所述第二网络设备根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源，包括：
    所述第二网络设备将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源。
  25. 根据权利要求22所述的方法，其特征在于，所述第二PRACH资源是所述第一PRACH资源中的至少一部分PRACH资源按照所述系统帧偏移量进行偏移之后得到的。
  26. 根据权利要求22所述的方法，其特征在于，所述第二PRACH资源是所述第一PRACH资源中的至少一部分PRACH资源按照所述系统帧偏移量和所述时隙的偏移量进行偏移之后得到的。
  27. 根据权利要求21至26中任一项所述的方法，其特征在于，所述时隙的偏移量为正数或负数。
  28. 根据权利要求15至27中任一项所述的方法，其特征在于，所述位置调整信息还包括周期，所述周期用于指示所述第一网络设备使用所述第二PRACH资源的时间间隔。
  29. 根据权利要求24所述的方法，其特征在于，所述位置调整信息还包括目标时隙或符号的位置信息，
    所述第二网络设备将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源，包括：
    将所述目标时隙或符号上的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
  30. 根据权利要求24所述的方法，其特征在于，所述第二网络设备将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源，包括：
    所述第二网络设备确定所述第一PRACH资源与第三PRACH资源在时域上冲突的目标时隙或符号，所述第三PRACH资源用于所述第一网络设备接收随机接入请求；
    将所述目标时隙或符号中的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
  31. 根据权利要求23至30中任一项所述的方法，其特征在于，所述位置调整信息包括时隙和/或符号索引，所述时隙和/或符号索引用于指示所述第一PRACH资源中的至少一部分PRACH资源有效，
    所述第二网络设备根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源，包括：
    所述第二网络设备确定所述时隙和/或符号索引指示的所述第一PRACH资源中的至少一部分PRACH资源为所述第二PRACH资源。
  32. 根据权利要求15至31中任一项所述的方法，其特征在于，所述第二网络设备向第一网络设备发送所述位置调整信息，包括：
    所述第二网络设备通过F1接口应用协议或无线资源控制RRC消息或者介质访问控制元素MAC CE向所述第一网络设备发送所述位置调整信息。
  33. 一种通信装置，其特征在于，包括：
    收发单元和处理单元，
    所述收发单元，用于接收第一物理随机接入信道PRACH资源的配置信息；
    所述收发单元，还用于接收位置调整信息，所述位置调整信息用于指示调整所述第一PRACH资源中的至少一部分PRACH资源的位置；
    所述处理单元，用于根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源；
    所述收发单元，还用于在所述第二PRACH资源上向第二网络设备发送随机接入请求。
  34. 根据权利要求33所述的通信装置，其特征在于，所述位置调整信息包括时隙或符号的偏移量。
  35. 根据权利要求33或34所述的通信装置，其特征在于，所述位置调整信息包括系统帧偏移量。
  36. 根据权利要求34所述的通信装置，其特征在于，所述处理单元，具体用于将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源。
  37. 根据权利要求35所述的通信装置，其特征在于，所述第二PRACH资源是所述第一PRACH资源中的至少一部分PRACH资源按照所述系统帧偏移量进行偏移之后得到的。
  38. 根据权利要求35所述的通信装置，其特征在于，所述第二PRACH资源是所述第一PRACH资源中的至少一部分PRACH资源按照所述系统帧偏移量和所述时隙的偏移 量进行偏移之后得到的。
  39. 根据权利要求34至38中任一项所述的通信装置，其特征在于，所述时隙的偏移量为正数或负数。
  40. 根据权利要求33至39中任一项所述的通信装置，其特征在于，所述位置调整信息还包括周期，所述周期用于指示所述第一网络设备使用所述第二PRACH资源的时间间隔。
  41. 根据权利要求33至40中任一项所述的通信装置，其特征在于，所述收发单元具体用于通过F1接口应用协议或无线资源控制RRC消息或者介质访问控制元素MAC CE接收所述位置调整信息。
  42. 根据权利要求34所述的通信装置，其特征在于，所述第二PRACH资源是所述第一PRACH资源中的全部资源按照所述时隙或符号的偏移量进行偏移之后得到的。
  43. 根据权利要求34所述的通信装置，其特征在于，所述位置调整信息还包括目标时隙或符号的位置信息，
    所述处理单元，具体用于将所述目标时隙或符号上的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
  44. 根据权利要求36或42所述的通信装置，其特征在于，所述处理单元，具体用于确定所述第一PRACH资源与第三PRACH资源在时域上冲突的目标时隙或符号，所述第三PRACH资源用于所述第一网络设备接收随机接入请求；
    将所述目标时隙或符号中的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
  45. 根据权利要求33至44中任一项所述的通信装置，其特征在于，所述位置调整信息包括时隙和/或符号索引，所述时隙和/或符号索引用于指示所述第一PRACH资源中的至少一部分PRACH资源有效，
    所述处理单元，具体用于确定所述时隙或符号索引指示的所述第一PRACH资源中的至少一部分PRACH资源为所述第二PRACH资源。
  46. 根据权利要求33至45中任一项所述的通信装置，其特征在于，所述第一PRACH资源的配置信息承载于系统广播消息或无线资源控制配置消息中。
  47. 一种通信装置，其特征在于，包括：
    处理单元和收发单元，
    所述处理单元，用于获取位置调整信息，所述位置调整信息用于指示调整第一物理随机接入信道PRACH资源中的至少一部分PRACH资源的位置；
    所述收发单元，用于向第一网络设备发送所述位置调整信息。
  48. 根据权利要求47所述的通信装置，其特征在于，所述通信装置为宿主基站，
    所述处理单元，具体用于根据所述第一PRACH资源的配置信息和第三PRACH资源的配置信息确定所述位置调整信息和/或第二PRACH资源，所述第三PRACH资源用于所述第一网络设备接收随机接入请求，所述第二PRACH资源用于接收所述第一网络设备发送的随机接入请求。
  49. 根据权利要求47所述的通信装置，其特征在于，所述通信装置为所述第一网络设备的上级节点，
    所述处理单元，具体用于根据所述第一PRACH资源的配置信息和第三PRACH资源的配置信息确定所述位置调整信息，所述第三PRACH资源用于所述第一网络设备接收随机接入请求；
    所述收发单元，具体用于通过宿主基站向所述第一网络设备发送所述位置调整信息，或者所述收发单元，具体用于直接向所述第一网络设备发送所述位置调整信息。
  50. 根据权利要求49所述的通信装置，其特征在于，所述收发单元，还用于接收所述宿主基站或所述第一网络设备发送的所述第三PRACH资源的配置信息。
  51. 根据权利要求47所述的通信装置，其特征在于，所述通信装置为所述第一网络设备的上级节点，
    所述收发单元，具体用于接收宿主基站或核心网设备发送的所述位置调整信息。
  52. 根据权利要求49至51中任一项所述的通信装置，其特征在于，所述收发单元，具体用于通过空口转发宿主基站或核心网设备发送的所述位置调整信息，或者所述收发单元，具体用于通过空口向所述第一网络设备发送所述位置调整信息。
  53. 根据权利要求47至52中任一项所述的通信装置，其特征在于，所述位置调整信息包括以下信息中的至少一种：
    时隙的偏移量，符号的偏移量，时隙索引或符号索引。
  54. 根据权利要求47至53中任一项所述的通信装置，其特征在于，所述位置调整信息包括系统帧偏移量。
  55. 根据权利要求49至53中任一项所述的通信装置，其特征在于，所述处理单元，还用于根据所述第一PRACH资源的配置信息和所述位置调整信息确定第二PRACH资源，所述第二PRACH资源用于接收所述第一网络设备发送的随机接入请求。
  56. 根据权利要求55所述的通信装置，其特征在于，所述位置调整信息包括时隙或符号的偏移量，
    所述处理单元，具体用于将所述第一PRACH资源中的至少一部分PRACH资源按照所述时隙或符号的偏移量进行偏移，得到所述第二PRACH资源。
  57. 根据权利要求54所述的通信装置，其特征在于，所述第二PRACH资源是所述第一PRACH资源中的至少一部分PRACH资源按照所述系统帧偏移量进行偏移之后得到的。
  58. 根据权利要求54所述的通信装置，其特征在于，所述第二PRACH资源是所述第一PRACH资源中的至少一部分PRACH资源按照所述系统帧偏移量和所述时隙的偏移量进行偏移之后得到的。
  59. 根据权利要求53至58中任一项所述的通信装置，其特征在于，所述时隙的偏移量为正数或负数。
  60. 根据权利要求47至59中任一项所述的通信装置，其特征在于，所述位置调整信息还包括周期，所述周期用于指示所述第一网络设备使用所述第二PRACH资源的时间间隔。
  61. 根据权利要求56所述的通信装置，其特征在于，所述位置调整信息还包括目标 时隙或符号的位置信息，
    所述处理单元，具体用于将所述目标时隙或符号上的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
  62. 根据权利要求56所述的通信装置，其特征在于，所述处理单元，具体用于确定所述第一PRACH资源与第三PRACH资源在时域上冲突的目标时隙或符号，所述第三PRACH资源用于所述第一网络设备接收随机接入请求；
    所述处理单元，具体用于将所述目标时隙或符号中的PRACH资源进行偏移，得到所述第二PRACH资源，所述第二PRACH资源包括第一PRACH资源偏移后的资源和未进行偏移的第一PRACH资源。
  63. 根据权利要求55至62中任一项所述的通信装置，其特征在于，所述位置调整信息包括时隙和/或符号索引，所述时隙和/或符号索引用于指示所述第一PRACH资源中的至少一部分PRACH资源有效，
    所述处理单元，具体用于确定所述时隙和/或符号索引指示的所述第一PRACH资源中的至少一部分PRACH资源为所述第二PRACH资源。
  64. 根据权利要求47至63中任一项所述的通信装置，其特征在于，所述收发单元，具体用于通过F1接口应用协议或无线资源控制RRC消息或者介质访问控制元素MAC CE向所述第一网络设备发送所述位置调整信息。
  65. 一种通信装置，其特征在于，包括处理器，用于执行如权利要求1至14中任一项所述的方法，或者于执行如权利要求15至32中任一项所述的方法。
  66. 一种计算机可读存储介质，其特征在于，存储有计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1至14中任一项所述的方法，或者使得所述计算机执行如权利要求15至32中任一项所述的方法。
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