WO2020063405A1 - 发送定时的确定方法及设备、计算机可读存储介质 - Google Patents

发送定时的确定方法及设备、计算机可读存储介质 Download PDF

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Publication number
WO2020063405A1
WO2020063405A1 PCT/CN2019/106259 CN2019106259W WO2020063405A1 WO 2020063405 A1 WO2020063405 A1 WO 2020063405A1 CN 2019106259 W CN2019106259 W CN 2019106259W WO 2020063405 A1 WO2020063405 A1 WO 2020063405A1
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WIPO (PCT)
Prior art keywords
timing
node
adjustment
transmission timing
information
Prior art date
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PCT/CN2019/106259
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English (en)
French (fr)
Inventor
邢卫民
卢有雄
毕峰
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中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to JP2021517383A priority Critical patent/JP7152601B2/ja
Priority to KR1020217012940A priority patent/KR102484250B1/ko
Priority to EP19866968.1A priority patent/EP3860235A4/en
Priority to BR112021005935-0A priority patent/BR112021005935A2/pt
Priority to US17/280,478 priority patent/US11576140B2/en
Publication of WO2020063405A1 publication Critical patent/WO2020063405A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
    • H04W56/006—Synchronisation arrangements determining timing error of reception due to propagation delay using known positions of transmitter and receiver
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
    • G01S19/05—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing aiding data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/005—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by adjustment in the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • the embodiments of the present disclosure relate to, but are not limited to, the field of 5G NR (New Radio) wireless communication technology.
  • 5G NR New Radio
  • Relay wireless relay
  • Time division multiplexing does not support space division multiplexing (SDM) and frequency division multiplexing (FDM).
  • SDM space division multiplexing
  • FDM frequency division multiplexing
  • IAB integrated access and backhaul
  • the present disclosure provides a method for determining transmission timing.
  • the method may include: a first node sends first timing adjustment information to a second node, and the first timing adjustment information is used to adjust the second timing.
  • the first sending timing of the node or instructing the second node to use the global navigation satellite system GNSS timing as the first sending timing of the second node, where the first sending timing is the downlink sending timing of the second node.
  • the present disclosure also provides a method for determining transmission timing.
  • the method may include: a second node receiving first timing adjustment information sent by a first node, and adjusting the first timing adjustment information according to the first timing adjustment information.
  • the first sending timing of the two nodes; or the second node uses the global navigation satellite system GNSS timing as the first sending timing, and the first sending timing is a downlink sending timing of the second node.
  • the present disclosure also provides a device for determining transmission timing.
  • the device may include: a sending module configured to send first timing adjustment information to a second node through a first node, the first timing adjustment The information is used to adjust the first sending timing of the second node, and / or, the synchronization type indication information is sent to the second node by the first node, and the synchronization type indication information includes at least one of the following: a global navigation satellite system GNSS timing, air interface OTA / base station timing; the synchronization type indication information is used to determine an adjustment manner of the first transmission timing, wherein the first node is a parent node of the second node, and the first transmission timing is The downlink sending timing of the second node.
  • a sending module configured to send first timing adjustment information to a second node through a first node, the first timing adjustment The information is used to adjust the first sending timing of the second node, and / or, the synchronization type indication information is sent to the second node by the first node, and
  • the present disclosure also provides a device for determining transmission timing.
  • the device may include: a receiving module configured to receive first timing adjustment information sent by a first node, and adjust a first time according to the first timing adjustment information.
  • the present disclosure also provides a communication device, which may include a processor, a memory, a communication unit, and a communication bus; the communication bus is configured to implement the processor, the communication unit, and the memory A communication connection between them; the processor is configured to execute one or more first programs stored in a memory to implement the steps of the method described herein; the processor is further configured to execute one or more stored in a memory A second program to implement the steps of the method described.
  • a communication device may include a processor, a memory, a communication unit, and a communication bus; the communication bus is configured to implement the processor, the communication unit, and the memory A communication connection between them; the processor is configured to execute one or more first programs stored in a memory to implement the steps of the method described herein; the processor is further configured to execute one or more stored in a memory A second program to implement the steps of the method described.
  • an embodiment of the present disclosure further provides a computer-readable storage medium, where the computer-readable storage medium stores one or more first computer programs and one or more second computer programs, the one or A plurality of first computer programs may be executed by one or more processors to implement the steps of the method described herein; the one or more second computer programs may be executed by one or more processors to achieve what is described herein. The steps of the method described.
  • FIG. 1 is a schematic structural diagram of a typical multi-hop network under IAB technology
  • FIG. 2 is a flowchart of a method for determining a transmission timing based on a parent node according to an embodiment of the present disclosure
  • FIG. 3 is a flowchart of a method for determining a transmission timing based on a child node according to an embodiment of the present disclosure
  • FIG. 4 is a flowchart of a method for determining a transmission timing based on a terminal side according to an embodiment of the present disclosure
  • FIG. 5 is a schematic structural diagram of a device for determining transmission timing according to an embodiment of the present disclosure
  • FIG. 6 is another schematic structural diagram of a device for determining transmission timing according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure.
  • FIG. 9 is another flowchart of a method for determining a transmission timing according to an embodiment of the present disclosure.
  • a typical structure is shown in Figure 1.
  • a node that has a direct connection (for example, a wired connection) with the core network is called an IAB donor or a donor node (donor node), which can obtain downlink data or send uplink data to the core network.
  • the IAB node (IAB node) is wirelessly connected to its associated parent IAB node.
  • the parent IAB node of IAB node 2 is IAB node 1
  • the parent IAB node of IAB node 1 is the donor node.
  • the IAB node accesses the parent IAB node in a similar manner to the UE.
  • IAB donors and IAB nodes support terminal (UE) access.
  • UE terminal
  • OTA time advance
  • the base station adjusts the uplink transmission timing of the UE, and the TA value is the propagation delay. double.
  • the IAB node For the IAB node to maintain synchronization with the parent, that is, the downlink timing is aligned, it is necessary to advance its own downlink transmission timing in advance by half the TA value indicated by the parent node, so that the IAB node can be determined through the traditional TA mechanism.
  • the sending timing when the child node or UE communicates with the parent node it also determines the sending timing of the IAB node as the base station serving its child node or UE.
  • the IAB node needs to receive the downlink data of the parent node and the uplink data of the child node (UE) or the UE, and / or send data to the parent node and the child node or UE simultaneously.
  • the TA value may no longer be twice the propagation delay.
  • the traditional TA process may not meet the requirements of OTA synchronization and FDM or SDM at the same time.
  • the synchronization process must also consider the scenario where the IAB node has GNSS (Global Navigation Navigation System) timing capability.
  • GNSS Global Navigation Navigation System
  • the present disclosure particularly provides a method and device for determining transmission timing, and a computer-readable storage medium, which substantially avoids one or more of the problems caused by the disadvantages and limitations of the related art.
  • FIG. 2 is a method for determining a transmission timing based on a parent node side according to an embodiment of the present disclosure.
  • a parent node is referred to as a first node
  • a child node under the parent node is referred to as a second node
  • a terminal UE respectively disposed under the parent node or the child node is referred to as a lower-level device.
  • the second node may include multiple nodes.
  • the plurality of second nodes may be all connected to the parent node, or may be connected in a chain.
  • the method for determining the transmission timing on the parent node side is mainly a process of sending synchronization adjustment timing to the subordinate node or terminal for realizing bidirectional transmission timing.
  • the method may include steps S201 and S202.
  • step S201 the first node determines the type of timing synchronization to be issued according to its own decision or network configuration.
  • the timing synchronization type may include global navigation satellite system GNSS timing and / or air interface OTA / base station timing.
  • the GNSS timing type may be preferred.
  • the GNSS is sent with the highest priority or indicates that the synchronization type is GNSS timing. If the first node does not support GNSS or does not want to use GNSS, or the network configuration or the first
  • the parent node of the node is configured not to use GNSS, so when sending the synchronization type indication information, it will not send with the highest priority of GNSS.
  • the OTA / base station timing type is the highest priority or the synchronization type is OTA / base station timing.
  • the synchronization type indication information is notified to the second node or the terminal, thereby ensuring that the timing between the two is normal.
  • step S202 the first node sends the first timing adjustment information to the second node, or instructs the second node to use the GNSS timing as the first sending timing of the second node.
  • the first timing adjustment information is used to adjust the first transmission timing of the second node
  • the synchronization type indication information includes at least one of the following: global navigation satellite system GNSS timing, and air interface OTA / Base station timing
  • the synchronization type indication information is used to determine an adjustment manner of a first sending timing, wherein the first node is a parent node of the second node, and the first sending timing is a downlink of the second node Send timing.
  • the first timing adjustment information when the first node uses OTA / base station timing adjustment, it directly issues the first timing adjustment information, and when it uses the GNSS timing method, it issues The GNSS timing type is sent, which directly instructs the second node to use the GNSS timing as the first transmission timing.
  • the first node can also be implemented by sending the synchronization type indication information in the following manner.
  • the first node When the first node supports two timing modes (ie, GNSS timing and OTA / base station timing), the first node will issue synchronization type indication information.
  • the synchronization type indicates information to determine the timing method. If it is determined that the OTA / base station timing adjustment is used, it directly sends the first timing adjustment information. If it is determined that the GNSS timing type is used, it directly instructs the second node to use it.
  • the GNSS timing is used as the first transmission timing.
  • the synchronization type indication information may also be used to indicate the timing synchronization type currently used on the first node, and the second node determines the timing synchronization type or mode of the second node according to the synchronization type indication information.
  • the first sending timing is a downlink sending timing of the second node
  • the second sending timing is an uplink sending timing of the second node
  • the timing synchronization type exists in the synchronization type indication information in one of the following ways: a GNSS enable flag, indicating timing synchronization type information, and indicating synchronization type priority information.
  • this method generally indicates whether to use GNSS or not to use GNSS.
  • the second node should use the GNSS timing type; otherwise, the second node should select the type of OTA / base station to use; or 2) directly push the corresponding supported type , Select the corresponding one according to the type indication; or push the corresponding type directly.
  • the second node should use the GNSS timing type if the GNSS timing type is indicated and the second node supports GNSS.
  • the second node should choose the type of OTA / base station to use; or 3) Push it in a priority manner, which indicates the priority order of multiple timing synchronization types, and then the second node selects itself according to the priority order It also supports ways to adjust the sending timing in synchronization with the first node.
  • the second node may also issue a timing synchronization type to its child node or terminal, and the synchronization type indication may be the same as the timing synchronization type indication issued by the first node.
  • the second node may send or the terminal itself may send indication information of whether to support a certain synchronization type to the first node, such as capability information of whether to support GNSS timing.
  • the first node when the first node sends the synchronization type indication information, after receiving the synchronization type indication information from the second node, if it is found that the second node or the terminal itself no longer supports the type indicated by the first node , Or when the indicated type is unavailable, the first node further includes receiving a request for a changed timing synchronization type from the second node or the terminal, and the request message may be pushed in the form of GNSS status information or capability information; or In this embodiment, for the synchronization type indication information received at the second node as GNSS, if the GNSS timing of the second node is unavailable at the beginning, the second node selects the OTA synchronization timing method, but the second node finds GNSS Become reliable and ready to use, the first node also includes receiving a request for a more timing synchronization type from the second node or the terminal. The request message may be pushed in the form of GNSS status information or capability information.
  • the push is not necessarily limited to the above
  • the first node adjusts the timing synchronization type of the second node according to the request message, and feeds back a response message to the second node or terminal, so that the second node or terminal learns to adjust, and finally, both Synchronize the transmission timing with the adjusted type, and finally determine the transmission timing.
  • the first timing adjustment information may include synchronization adjustment information
  • the synchronization adjustment information includes one of the following adjustment amounts: relative to a signal sent by the first node at the second node, a first downlink reception timing adjustment amount ⁇ T a, with respect to said second node sending a second timing adjustment amount ⁇ T b, with respect to the second node sends a third current first timing adjustment amount [Delta] T c .
  • adjustment can be performed in the following three ways.
  • Method 1 If the synchronization adjustment information is a first adjustment amount ⁇ T a , the downlink reception timing T 1 is obtained in advance to obtain the first transmission timing according to a value indicated in the first adjustment amount. A transmission timing is T 1 - ⁇ T a .
  • Method 2 If the synchronization adjustment information is a second adjustment amount ⁇ T b , adjust the current second transmission timing T 2 by ⁇ T b to obtain the first transmission timing, and the first transmission timing is T 2 - ⁇ T b .
  • the method for determining the transmission timing provided in this embodiment is implemented by using the synchronization type instruction information sent to the second node or the terminal to control the second node to adjust the first transmission timing of the second node by using the synchronization type instruction information.
  • the synchronization timing adjustment of the transmission timing between multiple terminals also makes it possible to ensure that in 5G NR, when the nodes implement the same reception or the same transmission, the transmission timing adjustment mechanism between nodes will not affect each other; at the same time, it will also improve In addition to the data transmission efficiency of the IAB network and the utilization rate of allocated resources, it can further better meet the needs of nodes or UEs and improve the user experience. This solution is easy to implement and is suitable for a variety of different scenarios.
  • FIG. 3 is a method for determining transmission timing based on a child node side according to an embodiment of the present disclosure.
  • a parent node is referred to as a first node
  • a child node under the parent node is referred to as a second node
  • a terminal UE respectively disposed under the parent node or the child node is referred to as a lower-level device.
  • the second node may include multiple nodes.
  • the plurality of second nodes may be all connected to the parent node, or may be connected in a chain.
  • the method for determining the transmission timing on the child node side is mainly to adjust its own first transmission timing and / or second transmission timing according to the synchronization type indication information issued by the first node (parent node), and Sending to its subordinate nodes or terminals a process for adjusting the timing synchronously to achieve bidirectional transmission timing.
  • the method may include steps S301 and S302.
  • step S301 the second node receives the first timing adjustment information issued by the first node, or uses GNSS timing.
  • the timing synchronization type indication may also be implemented by sending synchronization type indication information.
  • the first node supports both the GNSS timing and the OTA / base station timing.
  • the synchronization type indication information is used to determine the timing synchronization type currently used by the first node, and the timing synchronization type includes global navigation satellite system GNSS timing and / or air interface OTA / base station timing.
  • the first timing adjustment information when the first node uses OTA / base station timing adjustment, it directly issues the first timing adjustment information, and when it uses the GNSS timing method, it issues The GNSS timing type is sent, which directly instructs the second node to use the GNSS timing as the first transmission timing.
  • the first node can also be implemented by sending the synchronization type indication information in the following manner.
  • the first node When the first node supports two timing modes (ie, GNSS timing and OTA / base station timing), the first node will issue synchronization type indication information.
  • the synchronization type indicates information to determine the timing method. If it is determined that the OTA / base station timing adjustment is used, it directly sends the first timing adjustment information. If it is determined that the GNSS timing type is used, it directly instructs the second node to use it.
  • the GNSS timing is used as the first transmission timing.
  • the second node receives the synchronization type indication information indicating GNSS timing, and the second node does not support GNSS or considers that GNSS is unreliable, it will choose to interactively negotiate with the first node to re-determine the timing adjustment. the way.
  • the synchronization type indication information issued by the first node is basically sent with the highest priority of GNSS or indicates that the synchronization type is GNSS timing. If the first node does not support GNSS or does not want to use GNSS itself, or the network configuration or The parent node of the first node is configured not to use GNSS, so when sending synchronization type indication information, it does not send with the highest priority of GNSS. At the same time, the synchronization type indication information is also notified to the second node or the terminal, thereby ensuring that the timing between the two is normal.
  • step S302 the first transmission timing of the second node is adjusted according to the first timing adjustment information, or it is determined to use the GNSS timing as the first transmission timing of the second node.
  • the first sending timing is a downlink sending timing of the second node
  • the second sending timing is an uplink sending timing of the second node.
  • the second node when it adjusts the first transmission timing, it can also adjust by means of GNSS timing, that is, directly use the GNSS timing as the first transmission timing.
  • the second node may determine to use the GNSS timing according to its own decision or network configuration.
  • the second node may first receive the synchronization type indication information issued by the first node, and then determine the corresponding adjustment method according to the synchronization type indication information; if When the adjustment method is GNSS timing, directly use GNSS timing as the first sending timing; if the adjustment method is OTA / base station timing, the second node receives the first timing adjustment information issued by the first node and adjusts according to the first timing adjustment information The first sending timing.
  • the method before the second node receives the first timing adjustment information sent by the first node or before the second node uses the GNSS timing as the first transmission timing of the second node, the method further It may include: receiving, by the second node, synchronization type indication information sent by the first node, determining a timing synchronization type using GNSS timing and / or determining a timing synchronization type using OTA / base station timing; and determining the corresponding one according to the timing synchronization type
  • An adjustment manner of a first transmission timing; and adjusting the first transmission timing of the second node includes: adjusting the first transmission timing of the second node according to the first timing adjustment information received by the adjustment manner, Or use the used GNSS timing as the first sending timing of the second node.
  • the timing synchronization type exists in the synchronization type indication information in one of the following ways: a GNSS enable flag, and indicating timing synchronization.
  • Type information indicating synchronization type priority information.
  • the first node when it sends the timing synchronization type, it will choose the following three cases to send: 1) Push it in the way of the GNSS enable flag, but this method generally can only indicate that it supports GNSS or does not support GNSS. If it is not supported, the second node should automatically select the type of OTA / base station to use; or 2) directly push the corresponding supported type, and only select the corresponding one according to the type; or 3) push in a priority manner, The priority is preferably that the first node supports the method as the highest priority, and then the second node selects a method that it also supports in synchronization with the first node to adjust the sending timing according to the priority order.
  • the second node receives synchronization type indication information sent by the first node, determines a timing synchronization type using global navigation satellite system GNSS timing, and / or determines a timing synchronization type using air interface OTA / base station timing. After that, it may further include: determining a corresponding adjustment manner of the first transmission timing according to the timing synchronization type; and adjusting the first transmission timing based on the adjustment manner.
  • the method may further include: determining whether the second node itself supports GNSS timing; if it supports, then The GNSS timing is used as a timing synchronization type for the downlink sending timing of the second node; if it is not supported, a request for adjusting the timing synchronization type to OTA / base station timing is sent to the first node, and the request includes Own GNSS status information or capability information.
  • the synchronization type indication information indicates the timing synchronization type of GNSS timing, and it is determined that the second node itself supports GNSS timing, then it is determined that the timing synchronization type of the GNSS timing is used, and the GNSS is determined.
  • the timing is used as the first sending timing of the second node; otherwise, it is determined to use the timing synchronization type of the OTA / base station timing; receive the first timing adjustment information sent by the first node, and adjust the address according to the first timing adjustment information.
  • the first transmission timing of the second node is described.
  • the first node when it sends the timing synchronization type, it will choose the following three cases to send: 1) Push in the way of GNSS enable flag.
  • This method generally indicates the use of GNSS or does not use GNSS.
  • the second node if the use of GNSS is instructed and the second node supports GNSS, the second node should use the GNSS timing type; otherwise, the second node should choose the type of OTA / base station to use; or 2) directly use the corresponding supported type Push, just select the corresponding one according to the type indication; or push the corresponding type directly.
  • the second node should use the GNSS timing type Otherwise, the second node should choose the type of OTA / base station to use; or 3) Push it in a priority manner, which indicates the priority order of multiple timing synchronization types, and then the second node selects according to the priority order
  • the method also supports synchronization with the first node to adjust the sending timing.
  • the second node may also issue a timing synchronization type to its child node or terminal, and the synchronization type indication may be the same as the timing synchronization type indication issued by the first node.
  • the second node may send or the terminal itself may send indication information of whether to support a certain synchronization type to the first node, such as capability information of whether to support GNSS timing.
  • the adjustment of the first transmission timing and the second transmission timing by the second node directly uses the GNSS timing as the first transmission timing or the second transmission timing.
  • the timing in the GNSS timing is set as the first transmission timing of the second node.
  • the synchronization type indication information further includes information on the mode / type / mode of the OTA / base station timing, that is, the OTA / base station timing may include multiple Types.
  • the first node no longer sends synchronization type indication information, and the second node adopts the OTA / base station timing method by default.
  • the system or standard sets a default timing synchronization type. If no synchronization type indication is sent, it is equivalent to indicating that the timing synchronization type is the default timing synchronization type.
  • the default timing synchronization type can be OTA / base station timing or GNSS. Timing can also be a certain OTA / base station timing mode.
  • the sending timing includes receiving time adjustment information sent by the first node (parent node), and adjusting the first sending timing of the second node according to the adjustment information.
  • the way in which the node or terminal adjusts and determines the transmission timing in the two modes of GNSS timing and OTA / base station timing is different. Therefore, in the OTA / base station timing mode, it also needs to Receive time adjustment information for adjusting transmission timing from an upper node (parent node), and adjust the first transmission timing of the second node or terminal according to the adjustment information.
  • the adjustment information is received by receiving a first transmission timing adjustment message (for example, first timing adjustment information) issued by the first node and used to instruct downlink transmission timing adjustment of the second node. obtain.
  • a first transmission timing adjustment message for example, first timing adjustment information
  • multiple OTA / base station timing modes / types / methods can be used to determine the first transmission timing. Which one is used can be obtained from the synchronization type indication information sent by the first node, or can be adjusted from In the message.
  • the mode / type / mode of OTA / base station timing may include:
  • a mode / type / mode of OTA / base station timing is that the first sending timing adjustment message is synchronization adjustment information, and the synchronization adjustment information includes at least one of the following adjustment amounts: sent relative to the first node adjusting an amount of the first signal reception timing in a downlink of said second node ⁇ T a, with respect to the second transmission timing adjustment amount of the second node (e.g., node uplink transmission timing) ⁇ T b,
  • the third adjustment amount ⁇ T c or the third adjustment amount ⁇ T c relative to the current first transmission timing of the second node may also be understood as the change amount relative to the current first adjustment amount ⁇ T a of the second node.
  • the method may further include: obtaining OTA / base station timing mode indication information sent by the first node, and the OTA / base station timing mode indicated by the mode indication information includes at least one of the following:
  • the first sending timing adjustment message is mode one of synchronization adjustment information
  • the first sending timing adjustment message is mode two of time adjustment information
  • the first sending timing adjustment message is mode three of the time adjustment information.
  • the mode 1, mode 2 and mode 3 refer to the following adjustment process.
  • adjusting the first sending timing of the second node includes: The downlink reception timing T 1 of the second node is advanced by ⁇ T a to obtain the first transmission timing, and the first transmission timing is T 1 - ⁇ T a ;
  • adjusting the first sending timing of the second node includes: sending the current second sending The timing T 2 is adjusted by ⁇ T b to obtain the first transmission timing, and the first transmission timing is T 2 - ⁇ T b ; the second transmission timing is a transmission timing at which the second node sends to the first node .
  • adjusting the first transmission timing of the second node includes: sending the current first transmission The timing T old is adjusted by ⁇ T c to obtain a new first transmission timing, and the first transmission timing is T old - ⁇ T c .
  • the time adjustment information includes one of a time advance amount TA and a change adjustment amount ⁇ TA; the change adjustment amount ⁇ TA is relative to the previous time The amount of change in time advance TA.
  • the adjustment method when the first sending timing adjustment message is synchronization adjustment information, the adjustment method further includes the following three methods.
  • Method 1 If the synchronization adjustment information is a first adjustment amount ⁇ T a , adjusting the first transmission timing of the second node includes: adjusting the downlink reception timing according to a value indicated in the first adjustment amount. T 1 obtains the first transmission timing in advance, and the first transmission timing is T 1 - ⁇ T a .
  • adjusting the first transmission timing of the second node includes: adjusting the current second transmission timing T 2 by ⁇ T b to obtain the first A transmission timing, and the first transmission timing is T 2 - ⁇ T b .
  • the second node or terminal uses the traditional timing advance TA adjustment information to adjust its second transmission timing, that is, the uplink transmission timing.
  • other modes also include, when the first sending timing adjustment message is timing advance TA adjustment information, the timing advance TA adjustment information includes one of a timing advance TA and a change adjustment amount ⁇ TA ;
  • the change adjustment amount ⁇ TA is a change amount from the previous (ie, current) time advance amount TA.
  • the time advancement TA adjustment information includes one of a time advancement TA and a change adjustment amount ⁇ TA; the change adjustment The amount ⁇ TA is a change amount from the previous time advancement amount TA.
  • the first sending timing adjustment message is timing advance TA adjustment information, it also includes two modes / types / modes of OTA / base station timing.
  • An OTA / base station timing mode / type / method is that when the time advance TA adjustment information is time advance TA, that is, if the adjustment mode instruction information indicates mode two, the according to the TA Adjusting the first sending timing of the second node includes: obtaining the first sending timing in advance by the downlink receiving timing T 1 according to a value indicated by the timing advance TA, where the first sending timing is T 1- TA-Ta_offset, where Ta_offset is a pre-configured TA offset; when the time adjustment information is a change adjustment amount ⁇ TA, adjusting the first sending timing and / or the second of the second node according to the TA
  • the sending timing includes: obtaining the first sending timing according to the change adjustment amount ⁇ TA and a previous time advance amount TA adjustment.
  • the first sending timing is T 1 -TA old - ⁇ TA-Ta_offset, and Ta_offset is pre-configured. TA offset.
  • the first sending timing is equal to the second sending timing.
  • the second sending timing of the second node is adjusted according to the timing advance TA message.
  • An OTA / base station timing mode / type / method is that when the time adjustment information is a time advance TA, that is, if the adjustment mode indication information indicates mode three, the adjustment of the second node's the first transmission timing may include: the amount of time in advance value TA indicated according to the downlink reception timing T 1 is obtained in advance for the first transmission timing of the first transmission timing T 1 -TA / 2; in In an exemplary embodiment, the second transmission timing is T 1 -TA-Ta_offset, and Ta_offset is a pre-configured TA offset.
  • the adjusting the first sending timing and / or the second sending timing of the second node according to the TA includes:
  • the first transmission timing is obtained according to the change adjustment amount ⁇ TA and the last time advance amount TA adjustment, and the first transmission timing is T 1- (TA old + ⁇ TA) / 2.
  • the second transmission timing is T 1 -TA old - ⁇ TA -Ta_offset, and Ta_offset is a pre-configured TA offset.
  • the second node or terminal when the second node or terminal determines that the OTA / base station timing is used, the second node or terminal also needs to determine which synchronization timing mode is selected to adjust the transmission timing.
  • the synchronization type indication information sent by the first node further includes mode / type / mode indication information of OTA / base station timing, and then according to the mode / type indicated by the synchronization type indication information / Mode selection:
  • the synchronization timing mode is used to adjust the transmission timing, that is, one of the above-mentioned OTA / base station timing mode / type / mode is selected.
  • the first sending timing adjustment message further includes an indication synchronization timing mode
  • the indicated timing mode / type / mode is one of the above-mentioned OTA / base station timing mode / type / mode.
  • the adjusting the first transmission timing and / or the second transmission timing of the second node according to the adjustment information includes: adjusting the first transmission timing according to a synchronization mode selected from a mode / type / mode indicating the OTA / base station timing. A transmission timing and / or a second transmission timing.
  • the synchronization timing method For example, by instructing the synchronization timing method to adjust the transmission timing by using the synchronization adjustment information, when adjusting, select one of the methods in the synchronization adjustment information for adjustment, or even directly instruct the synchronization timing method to the Select which of the synchronization adjustment information to adjust.
  • the timing synchronization type needs to be changed, and specific requirements are requested.
  • the parent node changes at the same time.
  • the changing steps include:
  • the second node sends a request to the first node to adjust the timing synchronization type to the air interface OTA / base station timing, and the request includes its own GNSS status information or Capability information
  • the first node starts sending the timing adjustment information for adjusting the first sending timing to the second node, That is, it starts sending synchronization adjustment information to the second node.
  • the second node sends the first node to the first node.
  • the second node selects the OTA / base station timing method to adjust the first transmission timing, but the second node Then it is found that GNSS becomes reliable and ready for use, the second node sends a request message with a changed timing synchronization type to the first node.
  • the request message can be pushed in the form of GNSS status information or capability information, such as requesting a change to GNSS timing.
  • the second node may no longer adjust the first transmission timing according to the timing adjustment information sent by the first node, that is, use the GNSS timing as the first transmission timing.
  • the first sending timing adjustment message is synchronization adjustment information
  • the first node may no longer send the timing adjustment for adjusting the first sending timing to the second node.
  • Information that is, stop sending synchronization adjustment information to the second node.
  • the method further includes: sending the received synchronization type indication information to a lower-level node or terminal, where the lower-level node is the The child node of the second node, and the terminal is a subordinate device of the second node.
  • the second node when the second node delivers the synchronization type indication information, the second node may issue the synchronization method in the following manner:
  • One is to directly forward the synchronization type indication information sent by the first node
  • the second node itself regenerates the synchronization type indication information and sends it to the subordinate node or terminal.
  • the synchronization indication information sent to the subordinate node here also uses the GNSS enable flag, indicates the timing synchronization type information, and indicates synchronization.
  • One way in type priority information is that the second node itself regenerates the synchronization type indication information and sends it to the subordinate node or terminal.
  • the synchronization instruction information sent to a lower node here may further include that if the timing synchronization type is OTA / base station timing, the synchronization type indication information also includes a mode / type / mode of the OTA / base station timing. Instructions.
  • the second node adjusts the first sending timing and / or the second sending timing of the second node according to the timing synchronization type indicated in the synchronization type indication information by receiving the synchronization type indication information issued by the first node.
  • the adjustment mechanism of the transmission timing between nodes will not affect each other; at the same time, the data transmission efficiency of the IAB network and the utilization rate of allocated resources are improved, which can further better meet the needs of nodes or UEs and improve user experience .
  • This solution is easy to implement and is suitable for a variety of different scenarios.
  • FIG. 4 is a method for determining transmission timing based on a terminal side according to an embodiment of the present disclosure.
  • a parent node is referred to as a first node
  • a child node under the parent node is referred to as a second node.
  • a terminal UE under a parent node or a child node is called a lower-level device.
  • the terminal may include multiple terminals. The multiple terminals may all be connected to a parent node or a child node.
  • the method for determining the transmission timing on the terminal side is mainly to adjust the synchronization of the second transmission timing of itself according to the synchronization type indication information issued by the first node (parent node) or the second node (child node).
  • the process of adjusting timing As shown in FIG. 4, the method may include steps S401 and S402.
  • step S401 the terminal receives synchronization type indication information issued by the first node or the second node.
  • the synchronization type indication information is used to determine a timing synchronization type currently used by the first node or the second node, and the timing synchronization type includes a global navigation satellite system GNSS timing and an air interface OTA / base station timing.
  • the synchronization type indication information issued by the first node or the second node is basically sent with the highest priority of GNSS. If neither the first node nor the second node supports GNSS, the synchronization type is sent.
  • the instruction information is sent in a priority order manner, and it also informs the terminal of its own support information to ensure that the timing between the two is normal.
  • step S402 the second transmission timing of itself is adjusted by the timing synchronization type indicated in the synchronization type indication information.
  • the second transmission timing is an uplink transmission timing of the second node
  • the timing synchronization type exists in the synchronization type indication information in one of the following ways: a GNSS enable flag, Indicates timing synchronization type information and indicates synchronization type priority information.
  • the first node when it sends the timing synchronization type, it will choose the following three cases to send: 1) Push it in the way of the GNSS enable flag, but this method generally can only indicate that it supports GNSS or does not support GNSS. If it is not supported, the second node should automatically select the type of OTA / base station to use; or 2) directly push the corresponding supported type and select the corresponding one according to the type indication; or 3) push in a priority manner, The priority is preferably that the first node supports the method as the highest priority, and then the second node selects a method that it also supports in synchronization with the first node to adjust the sending timing according to the priority order.
  • the method further includes: determining whether the terminal itself supports GNSS timing; if it does, the GNSS timing is determined. As the timing synchronization type of the terminal for its downlink transmission timing; if not supported, sending a request to the first node or the second node to adjust the timing synchronization type to OTA / base station timing, the request includes itself GNSS status information or capability information.
  • the terminal receives the synchronization type indication information issued by the first node or the second node, and adjusts the terminal ’s second transmission timing according to the timing synchronization type indicated in the synchronization type indication information, thereby achieving multi-end communication.
  • the synchronization timing adjustment of the transmission timing of 5G also ensures that in 5G NR, when the nodes achieve the same reception or the same transmission, the adjustment mechanism of the transmission timing between the nodes will not affect each other; at the same time, it improves the IAB network. Data transmission efficiency and utilization of allocated resources can further better meet the needs of nodes or UEs, and improve user experience. This solution is easy to implement and is suitable for a variety of different scenarios.
  • the method for determining the transmission timing provided in the embodiment of the present disclosure is described in detail below with reference to various application scenarios, and the IAB network structure shown in FIG. 1 is taken as an example for description.
  • a simple way is to let all IAB nodes use absolute time for timing, such as using satellite systems to obtain timing, such as GNSS timing. Therefore, different IAB nodes can derive the same downlink frame, sub-frame, slot, and symbol number and position boundary.
  • the synchronization here can be the timing frame boundary, sub-frame boundary, Slot boundaries or symbol boundaries are aligned, but GNSS may not be supported by every IAB.
  • GNSS may fail due to various factors. For example, in severe weather, satellite signals and GNSS timing may not be obtained. At this time, It may still use the base station for synchronization through air interface interaction. So considering GNSS timing, a method for determining the synchronization or transmission timing of IAB nodes can be described in the following example.
  • the network structure is shown in FIG. 1, which includes a core network and a donor node connected to the core network in a wired manner, and IAB node 1, IAB node 2 wirelessly connected to the donor node, and IAB node 1 and IAB connected to the donor node.
  • the fake facility master node and IAB node 2 support GNSS.
  • IAB node 1 does not support GNSS.
  • the donor node determines to use GNSS timing according to its own decision or network configuration. The control process is as follows:
  • the donor node notifies the IAB node 1 of the synchronization type indication information.
  • the information may be a GNSS enable flag, or indicate the synchronization (source) type (for example, the type may be OTA / base station, GNSS), or indicate the synchronization priority.
  • the method for the donor node to notify or enable GNSS can be: the GNSS enable flag is true, or the synchronization type or / highest priority is set to GNSS.
  • IAB node 1 obtains the synchronization type indication and finds that the donor node is enabled or using GNSS timing, but IAB node 1 does not support GNSS, so IAB node 1 still needs to use OTA to synchronize with the donor node.
  • IAB node 1 can send GNSS status or capability information to the donor node, indicating whether to support GNSS or whether GNSS is available, so that the donor node can determine whether to use the OTA process for synchronization.
  • IAB node 1 indicates the synchronization type indication information to the child node IAB node 2.
  • IAB node 1 can directly forward the synchronization type indication information sent by the donor node, or generate the synchronization type indication information and send it to the child node itself. It is assumed here that GNSS is enabled in the synchronization instruction information sent to the child nodes, although IAB node 1 cannot use GNSS timing.
  • IAB node 2 obtains the synchronization type indication information and finds that IAB node 1 enables GNSS timing and IAB node 2 supports GNSS timing. At this time, IAB node 2 will use GNSS as the downlink transmission timing without the need for an OTA synchronization process. Similarly, IAB node 2 can send GNSS status or capability information to IAB node 1.
  • the master node of the fake facility does not enable GNSS.
  • the type indication information sent indicates that the base station is used. Synchronize in timing or OTA mode. At this time, even if IAB node 1 supports GNSS, it is necessary to use OTA to synchronize with the donor node. Similarly, IAB node 2 also uses OTA to synchronize with IAB node 1.
  • the terminal in the process of using the GNSS timing to adjust the transmission timing, if the transmission GNSS timing is not reliable, the timing synchronization type needs to be changed. In this case, the terminal needs to request a higher-level node to make a simultaneous change.
  • the changing step may include: if it is determined that the GNSS timing is unreliable, the terminal sends to the first node or the second node a
  • the timing synchronization type is adjusted to an air interface OTA / base station timing request, and the request includes its own GNSS status information or capability information; and the first sending timing and / or the first time are readjusted according to the adjusted OTA / base station timing.
  • Second sending timing which will be discussed in the following example.
  • the network structure is shown in Figure 1.
  • the fake facility master node and IAB node 2 support GNSS.
  • IAB node 1 does not support GNSS, and the donor node determines to use GNSS timing according to its own decision or network configuration, as in the above example.
  • IAB node 1 will use OTA to synchronize with the donor node to determine the sending timing; IAB node 2 will use GNSS timing.
  • IAB node 2 needs to send an OTA synchronization request or GNSS status information to IAB node 1 to request the use of OTA synchronization. Or, IAB node 1 changes the synchronization type indication information and no longer uses GNSS. For example, the synchronization type is set to OTA synchronization. At this time, IAB node 2 also needs to perform synchronization according to the OTA method to determine its own downlink transmission timing.
  • the network structure is shown in Figure 1.
  • the fake facility master node, IAB node 1, and IAB node 2 all support GNSS, but IAB node 1 is not available at the beginning, and the donor node determines to use GNSS according to its own decision or network configuration. Timing, as described in the above example, IAB node 1 will use OTA to synchronize with the donor node to determine the sending timing; IAB node 2 will use GNSS timing.
  • IAB node 1 needs to send GNSS status information to the donor node to request the use of GNSS timing.
  • the donor node can stop the OTA synchronization process with IAB node 1, and IAB node 1 uses GNSS to determine its own downlink transmission timing.
  • a terminal or an IAB node when a terminal or an IAB node synchronizes the timing of transmission in an OTA / base station timing manner, it is implemented by receiving synchronization adjustment information or time adjustment information.
  • the synchronization adjustment information or time adjustment information may be Divided into the following three adjustment modes.
  • the first timing adjustment (advance) message indicates the synchronization adjustment information sent by the node downstream, for example, indicates the adjustment amount ⁇ T a , which is relative to the timing (downlink reception timing) of the signal sent by the parent node at the node.
  • An adjustment amount; or an adjustment amount ⁇ T b is indicated as an adjustment amount relative to the second transmission timing of the node; or an adjustment amount ⁇ T c is indicated as an adjustment relative to the current first transmission timing of the node
  • the amount can also be said to be an adjustment amount relative to the adjustment amount of the current first timing;
  • the synchronous adjustment information can uniquely determine the ⁇ T a , ⁇ T b , or ⁇ T c , it is equivalent to indicating ⁇ T a , ⁇ T b, or ⁇ T c .
  • the adjustment information indicates A multiple of ⁇ T a or a value based on ⁇ T a operation (such as adding ⁇ T a to or subtracting several symbol lengths), or an index indicating ⁇ T a , which can be obtained through the index (indicator or indicator) ⁇ T a , these ways are equivalent to indicate ⁇ T a .
  • the first timing adjustment (advance) message is TA adjustment (advance) information.
  • the TA adjustment (advance) information indicates the adjustment amount TA, or the adjustment amount ⁇ TA.
  • the first timing adjustment amount TA is determined.
  • TA old + ⁇ TA where TA old is the adjustment amount used before receiving the adjustment message
  • the first timing is T 1 -TA-TAoffset
  • T 1 is the timing of the signal sent by the parent node at the node (downlink reception timing)
  • the above ⁇ T 1 is TA + TA_offset, where TA_offset is a pre-configured TA offset.
  • the first timing adjustment (advance) message is TA adjustment (advance) information.
  • the TA adjustment (advance) information indicates the adjustment amount TA, or the adjustment amount ⁇ TA.
  • the first timing adjustment amount TA is determined.
  • the ⁇ T 1 is TA / 2.
  • Mode 2 is taken as an example to explain:
  • the downlink transmission timing of IAB node 1 is the same as the uplink transmission timing.
  • the downlink transmission timing is the timing used when sending to IAB node 2 or the UE connected to IAB node 1.
  • the uplink transmission timing is the sending to the parent node. (The donor node in this scenario).
  • the uplink sending TA process can be used to determine the uplink sending timing, and the downlink sending timing is also determined at the same time.
  • the donor node will send TA adjustment information to IAB node 1, including two types.
  • One type of TA adjustment (advance) information directly indicates the adjustment amount TA, that is, the downlink reception timing is directly advanced according to the indicated value, and the other type indicates
  • TA old is the adjustment amount used before receiving the adjustment message, so the first timing, that is, the downlink transmission timing is equal to the first.
  • the second sending timing (that is, the uplink sending timing) is T 1 -TA-TAoffset
  • T 1 is the timing (downlink receiving timing) of the signal sent by the parent node at the node
  • TA_offset is the pre-configured TA offset.
  • the value may be related to the frequency band or the way the carrier is used. It is a predefined value for the system. For example, the value is changed to 0 for FDD carriers (using a pair of carriers corresponding to uplink and downlink), and for TDD carriers (time division duplex, not a pair). Carrier) is generally not 0, which is a value preset according to the carrier frequency band protocol. Generally, this value corresponds to the time of receiving and transmitting or transmitting and receiving of the TDD carrier. That is, finally, the adjustment amount ⁇ T 1 at the first timing here is TA + TA_offset.
  • the donor node will send TA adjustment information to IAB node 1, including two types.
  • One type of TA adjustment (advance) information directly indicates the adjustment amount TA, that is, the downlink reception timing is directly advanced according to the indicated value, and the other type indicates
  • T 1 is the timing of the signal sent by the parent node at the node (downlink reception).
  • Timing TA_offset here is as described in the above example. That is, finally, the adjustment amount ⁇ T 1 at the first timing here is TA / 2.
  • the new signaling may indicate an adjustment amount ⁇ T a for the synchronization adjustment information, which is an adjustment amount relative to the timing (downlink reception timing) of the signal sent by the parent node at the node; or it indicates an adjustment amount ⁇ T b , which is a relative amount.
  • An adjustment amount at the second transmission timing of the node; or, an adjustment amount ⁇ T c is indicated, which is an adjustment amount relative to the current first transmission timing of the node, which can also be said to be an adjustment relative to the current first timing The amount of adjustment.
  • adjusting the first sending timing of the second node according to the TA includes: adjusting the first transmission timing according to the value indicated in the first adjustment amount.
  • the downlink reception timing is performed to obtain the first transmission timing in advance, and the first transmission timing is T 1 - ⁇ T a .
  • adjusting the first transmission timing of the second node according to the TA includes: adjusting the current second transmission timing by ⁇ T b to obtain the The first transmission timing is T 2 - ⁇ T b .
  • the synchronous adjustment information can uniquely determine the ⁇ T a , ⁇ T b , or ⁇ T c , it is equivalent to indicating ⁇ T a , ⁇ T b , or ⁇ T c .
  • the adjustment information indicates A multiple of ⁇ T a or a value based on ⁇ T a operation (such as adding ⁇ T a to or subtracting several symbol lengths), or an index indicating ⁇ T a , which can be obtained through the index (indicator or indicator) ⁇ T a , these ways are equivalent to indicate ⁇ T a .
  • the donor node will send the OTA adjustment information to the IAB node 1, that is, the synchronization adjustment information, indicating the adjustment amount ⁇ T 1 , which is the adjustment amount at the timing of the node (downlink reception timing) relative to the signal sent by the parent node.
  • the adjustment information of the OTA just indicates the adjustment amount relative to the previous OTA adjustment amount, that is, ⁇ T 1 is only a relative amount, that is, the indication Compared with the previous adjustment, the newly added adjustment amount only needs to adjust the first transmission timing currently used by ⁇ T 1 , and it can also be considered that the previous adjustment amount is adjusted by ⁇ T 1 ; or the adjustment information of the OTA indicates The adjustment amount or offset ⁇ T 1 from the currently used uplink transmission timing, that is, adjusting the current second transmission timing (uplink transmission timing) ⁇ T 1 to obtain the first transmission timing.
  • the methods in the above embodiments may also be used in combination, for example, using the first type of TA adjustment command (directly indicating the value of TA) to determine the initial first sending timing, such as the first A type of TA adjustment command is generally used during the access process.
  • the initial adjustment amount of the first transmission timing ⁇ T 1 is TA / 2.
  • the above-mentioned dedicated first timing adjustment information can be used to further adjust the first transmission timing.
  • the second type of TA adjustment command to further adjust the first transmission timing, that is, the initial signaling equivalent to the first transmission timing and the second transmission timing is one, but subsequent tracking adjustments use their own adjustment signaling. .
  • the parent node when the network can select multiple OTA methods for synchronization, the parent node must indicate which method or mode the child node uses. For example, the parent node can indicate that its OTA synchronization mode is one of the above embodiments, or other Type, the child node determines the first timing according to the downlink transmission timing determination method corresponding to the indicated type. That is, this implementation is used to explain that a parent node sends information of an OTA or a first timing determination method to a child node.
  • the indication may be carried in the synchronization type indication information, or the first timing adjustment information may be used for indication.
  • the first node no longer needs to indicate the OTA / base station timing mode, and the second node defaults to using only the OTA / base station in the system or standard. Timing mode.
  • the system or standard sets a default OTA / base station timing mode. If no mode indication information is received, the default OTA / base station timing mode is used.
  • the default OTA / base station timing mode can be the above mode 1, 2, One of three adjustment methods.
  • the above-mentioned method for determining the transmission timing may also be implemented in the following manner. That is, notification is performed by sending synchronization type indication information directly. As shown in FIG. 9, it may include steps S901 and steps. S902.
  • step S901 the second node receives synchronization type indication information issued by the first node.
  • the synchronization type indication information is used to determine a timing synchronization type currently used by the first node, and the timing synchronization type includes a global navigation satellite system GNSS timing and an air download OTA / base station timing.
  • the synchronization type indication information sent by the first node is basically sent with the highest priority of GNSS. If the first node does not support GNSS, it is sent in a priority order when the synchronization type indication information is sent, and It also informs the second node or terminal of its own support information to ensure that the timing between the two is normal.
  • step S902 the first transmission timing and / or the second transmission timing are adjusted according to the timing synchronization type indicated in the synchronization type indication information.
  • the first sending timing is a downlink sending timing of the second node
  • the second sending timing is an uplink sending timing of the second node.
  • the timing synchronization type exists in the synchronization type indication information in one of the following ways: a GNSS enable flag, indicating timing synchronization type information, and indicating synchronization type priority information.
  • the first node when it sends the timing synchronization type, it will choose the following three cases to send: 1) Push it in the way of the GNSS enable flag, but this method generally can only indicate support for GNSS or does not support GNSS If it is not supported, the second node should automatically select the type of OTA / base station to use; or 2) directly push the corresponding supported type, and only select the corresponding one according to the type; or 3) push in a priority manner,
  • the priority is preferably that the first node supports the method as the highest priority, and then the second node selects a method that it also supports in synchronization with the first node to adjust the sending timing according to the priority order.
  • the GNSS timing is indicated in the synchronization type indication information, before step S902, it may further include: determining whether the second node itself supports GNSS timing; if it does, the GNSS timing is determined. As the timing synchronization type of the downlink sending timing of the second node; if not supported, sending a request to the first node to adjust the timing synchronization type to OTA / base station timing, the request including its own GNSS Status information or capability information.
  • the adjustment of the first transmission timing and the second transmission timing by the second node directly uses the GNSS timing as the first transmission timing or the second transmission timing.
  • the timing in the GNSS timing is set as the first transmission timing of the second node.
  • adjusting the first transmission timing and / or the second transmission timing by using the timing synchronization type indicated in the synchronization type indication information includes: receiving a parent
  • the timing advance TA sent by the node is adjusted according to the TA to the first sending timing and / or the second sending timing of the second node.
  • a timing advance TA for adjusting transmission timing needs to be received from an upper node (parent node), and the first transmission timing and / or the second transmission timing of the second node or terminal is adjusted according to the TA.
  • the TA is obtained by receiving a first sending timing adjustment message sent by the first node and used to instruct downlink transmission timing adjustment of the second node.
  • the received first sending timing adjustment message may include two cases: synchronization adjustment information and timing advance TA adjustment information;
  • the synchronization adjustment information includes one of the following adjustment amounts: relative to the downlink reception timing of the signal sent by the first node at the second node.
  • a first adjustment amount ⁇ T a a first adjustment amount ⁇ T a , a second adjustment amount ⁇ T b relative to a second transmission timing of the second node, and a third adjustment amount ⁇ T c relative to a current first transmission timing of the second node;
  • the time advance amount TA adjustment information includes one of a time advance amount TA and a change adjustment amount ⁇ TA; the change adjustment amount ⁇ TA is relative to The amount of change in the previous timing advance TA.
  • the adjustment method when the first sending timing adjustment message is synchronization adjustment information, the adjustment method further includes the following methods:
  • adjusting the first sending timing of the second node according to the TA includes: adjusting the first transmission timing according to the value indicated in the first adjustment amount.
  • the downlink reception timing is performed to obtain the first transmission timing in advance, and the first transmission timing is T 1 - ⁇ T a .
  • adjusting the first transmission timing of the second node according to the TA includes: adjusting the current second transmission timing by ⁇ T b to obtain the The first transmission timing is T 1 - ⁇ T b .
  • adjusting the first transmission timing of the second node according to the TA includes: adjusting the current second transmission timing T 2 by ⁇ T c to obtain The first transmission timing is T 2 - ⁇ T c .
  • the time advancement TA adjustment information includes one of a time advancement TA and a change adjustment amount ⁇ TA; the change adjustment The amount ⁇ TA is a change amount from the previous time advancement amount TA.
  • the first sending timing adjustment message is timing advance TA adjustment information, it also includes two cases: one is that the first sending timing is the same as the second sending timing, and the other is the first sending timing and the first The two sending timings are different.
  • the timing advance TA adjustment information is a timing advance TA
  • the adjusting the first transmission timing of the second node according to the TA and / Or the second sending timing includes:
  • timing advance value TA indicated to the downlink reception timing T 1 is obtained in advance for the first transmission timing of the first transmission timing T 1 -TA-Ta_offset, Ta_offset offset preconfigured for the TA ;
  • the adjusting the first sending timing and / or the second sending timing of the second node according to the TA includes:
  • the first transmission timing is obtained according to the change adjustment amount ⁇ TA and the last time advance amount TA adjustment.
  • the first transmission timing is T 1 -TA old - ⁇ TA -Ta_offset, and Ta_offset is a pre-configured TA offset.
  • the timing advance TA adjustment information is a timing advance TA
  • the adjusting the first transmission of the second node according to the TA include:
  • the second sending timing is T 1 -TA-Ta_offset, and Ta_offset is a pre-configured TA offset
  • the second sending timing is T 1 -TA / 2;
  • the adjusting the first sending timing and / or the second sending timing of the second node according to the TA includes:
  • the second transmission timing is T 1 -TA old - ⁇ TA -Ta_offset
  • Ta_offset is a pre-configured TA offset
  • the second transmission timing is T 1- (TA old + ⁇ TA) / 2.
  • the second node or terminal when the second node or terminal determines that the OTA / base station timing is used, the second node or terminal further includes: it needs to determine which synchronization timing mode is selected to adjust the transmission timing, specifically:
  • the first sending timing adjustment message further includes an indication synchronization timing mode, and the indication timing mode includes: a synchronization mode using the synchronization adjustment information and a synchronization mode using the timing advance TA adjustment information;
  • the adjusting the first sending timing and / or the second sending timing of the second node according to the TA includes: adjusting the first sending timing and / or the second sending timing according to a synchronization mode selected from the indicated synchronization timing modes. Send timing.
  • the synchronization timing method For example, by instructing the synchronization timing method to adjust the transmission timing by using the synchronization adjustment information, when adjusting, select one of the methods in the synchronization adjustment information for adjustment, or even directly instruct the synchronization timing method to the Select which of the synchronization adjustment information to adjust.
  • the steps of which include:
  • the second node sends a request to the first node to adjust the timing synchronization type to download OTA / base station timing over the air, the request including its own GNSS status information or Capability information
  • the method further includes: sending the received synchronization type indication information to A lower node or a terminal, the lower node is a child node of the second node, and the terminal is a lower device of the second node.
  • the second node when the second node delivers the synchronization type indication information, the second node may issue the synchronization method in the following manner:
  • One is to directly forward the synchronization type indication information sent by the first node
  • the second node itself regenerates the synchronization type indication information and sends it to the subordinate node or terminal.
  • the synchronization indication information sent to the subordinate node here also uses the GNSS enable flag, indicates the timing synchronization type information, and indicates synchronization.
  • One way in type priority information is that the second node itself regenerates the synchronization type indication information and sends it to the subordinate node or terminal.
  • processing method on the side of the first node is:
  • the first node determines a timing synchronization type to be used according to its own decision or network configuration, and the timing synchronization type includes global navigation satellite system GNSS timing and over-the-air download OTA / base station timing;
  • Sending synchronization type indication information carrying the timing synchronization type to a second node or terminal, where the synchronization type indication information is used to adjust a first sending timing and / or a second sending timing of the second node, where The first node is a parent node of the second node; the timing synchronization type exists in the synchronization type indication information in one of the following ways: a GNSS enable flag, information indicating a timing synchronization type, and indication synchronization Type priority information.
  • An embodiment of the present disclosure provides a device for determining transmission timing, which can be applied to various base stations or terminals, especially a base station with an integrated IAB for access and backhaul.
  • the device is mainly applied to one end of an IAB node Controlling a device for controlling transmission timing, as shown in FIG.
  • the device may include: a sending module 51, configured to send first timing adjustment information to a second node, where the first timing adjustment information is used to adjust The first sending timing of the second node is described, and / or the first node sends synchronization type indication information to the second node, the synchronization type indication information includes at least one of the following: global navigation satellite system GNSS timing, and air interface OTA / Base station timing; the synchronization type indication information is used to determine an adjustment manner of a first sending timing, wherein the first node is a parent node of the second node, and the first sending timing is a second node's Downlink transmission timing, specifically, the timing synchronization type is determined by the first node according to its own decision or network configuration, and is implemented for each module in the device. And specific process steps, the above-described embodiments may be illustrated with reference to the uplink, downlink transmission timing adjusting process, are not repeated here.
  • the second node may also adjust its second sending timing according to the timing synchronization type, where the second sending timing is the uplink data sending time of the second node.
  • this disclosure also provides Another structure of a device for determining transmission timing.
  • the device is a device constructed based on a child node. As shown in FIG. 6, the device includes a receiving module 61 configured to receive first timing adjustment information sent by a first node. Adjusting the first transmission timing of the second node according to the first timing adjustment information, or the second node uses GNSS timing as the first transmission timing, and the first transmission timing is a downlink transmission timing of the second node.
  • the steps and specific processes implemented by the modules in the device reference may be made to the determination process of the uplink and downlink transmission timings shown in the foregoing embodiments, and details are not described herein again.
  • the method before the second node receives the first timing adjustment information sent by the first node or before the second node uses the GNSS timing as the first transmission timing of the second node, the method further includes:
  • the second node receives the synchronization type indication information sent by the first node, determines the timing synchronization type using GNSS timing, and / or determines the timing synchronization type using OTA / base station timing;
  • the adjusting the first sending timing of the second node includes:
  • the second node may also obtain the timing synchronization type by receiving the synchronization type indication information.
  • GNSS timing as the timing synchronization type for the second node to send its downlink transmission timing
  • the request includes its own GNSS status information or capability information.
  • the first timing adjustment (advance) message indicates synchronization adjustment information sent by the node downstream.
  • ⁇ T a Indicates an adjustment amount ⁇ T a , which is an adjustment amount at a timing (downlink reception timing) of the signal sent by the parent node at the node;
  • an adjustment amount ⁇ T b is indicated, which is an adjustment amount relative to a second transmission timing of the node;
  • an adjustment amount ⁇ T c is indicated, which is an adjustment amount relative to the current first transmission timing of the node, and can also be said to be an adjustment amount relative to the current first timing adjustment amount;
  • the first timing adjustment (advance) message is TA adjustment (advance) information. Specifically:
  • the first timing adjustment (advance) message is TA adjustment (advance) information. Specifically:
  • this embodiment also provides another terminal that cooperates with the second node or the first node.
  • the terminal includes a second receiving module 71 configured to receive the first node or the second node.
  • Synchronization type indication information is used to determine the timing synchronization type currently used by the first node or the second node, and the timing synchronization type includes global navigation satellite system GNSS timing and air interface OTA / base station timing
  • a second synchronization timing module 72 configured to adjust its second transmission timing by using the timing synchronization type indicated in the synchronization type indication information.
  • the apparatus by receiving synchronization type indication information issued by the first node, and adjusting the first transmission timing and / or the second transmission timing of the second node itself according to the timing synchronization type indicated in the synchronization type indication information, And control the uplink transmission timing of the child nodes or terminals under the second node, thereby achieving the synchronization timing adjustment of the transmission timing between multiple terminals, and also in 5GNR, it can ensure that nodes can achieve the same reception or transmission There is no mutual influence on the adjustment mechanism of the transmission timing between nodes; at the same time, the data transmission efficiency of the IAB network and the utilization ratio of the allocated resources are improved, which can further better meet the needs of the nodes or UEs and improve the user experience.
  • This solution is easy to implement and is suitable for a variety of different scenarios.
  • An embodiment of the present disclosure provides a communication device. As shown in FIG. 8, the device includes a processor 211, a memory 212, a communication unit 213, and a communication bus 214.
  • the communication bus 214 is used to implement a communication connection between the processor 2111, the communication unit 213, and the memory 212;
  • the processor 211 is configured to execute one or more first programs stored in a memory, so as to implement the steps of the method for determining transmission timing in the foregoing embodiments;
  • the processor 211 is configured to execute one or more second programs stored in the memory, so as to implement the steps of the method for determining transmission timing in the foregoing embodiments.
  • the processor 211 is configured to execute one or more third programs stored in the memory, so as to implement the steps of the method for determining transmission timing in the foregoing embodiments.
  • This embodiment also provides a computer-readable storage medium that is implemented in any method or technology for storing information, such as computer-readable instructions, data structures, computer program modules, or other data. Volatile or non-volatile, removable or non-removable media.
  • Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory, Read-Only Memory), EEPROM (Electrically Erasable, Programmable, Read-Only Memory, and Erasable Programmable Read-Only Memory) ), Flash memory or other memory technology, CD-ROM (Compact Disc Read-Only Memory), digital versatile disk (DVD) or other optical disk storage, magnetic box, magnetic tape, disk storage or other magnetic storage devices, Or any other medium that can be used to store desired information and can be accessed by a computer.
  • the computer-readable storage medium in this embodiment may be used to store one or more first computer programs, and the one or more first computer programs may be executed by one or more processors to implement the above. Steps of the method for determining transmission timing in the embodiments.
  • the computer-readable storage medium in this embodiment may be used to store one or more second computer programs, and the one or more second computer programs may be executed by one or more processors to implement Steps of the method for determining transmission timing in the above embodiments.
  • the computer-readable storage medium in this embodiment may be used to store one or more third computer programs, and the one or more third computer programs may be executed by one or more processors to implement Steps of the method for determining transmission timing in the above embodiments.
  • This embodiment also provides a first computer program (or computer software).
  • the first computer program may be distributed on a computer-readable medium and executed by a computable device to implement the sending as shown in the above embodiments. At least one step of the timing determination method; and in some cases, at least one step shown or described may be performed in an order different from that described in the above embodiments.
  • This embodiment also provides a second computer program (also referred to as computer software), which can be distributed on a computer-readable medium and executed by a computable device to implement the sending as shown in the above embodiments. At least one step of the timing determination method; and in some cases, at least one step shown or described may be performed in an order different from that described in the above embodiments.
  • a second computer program also referred to as computer software
  • This embodiment also provides a computer program product, which includes a computer-readable device.
  • the computer-readable device stores the first computer program, the second computer program, or the third computer program as shown above.
  • the computer-readable device in this embodiment may include a computer-readable storage medium as shown above.
  • a communication medium typically contains computer-readable instructions, data structures, computer program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium. Therefore, the present disclosure is not limited to any particular combination of hardware and software.

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Abstract

本申请提供一种发送定时的确定方法及设备、计算机可读存储介质，通过接收第一节点下发的第一定时调整信息，根据第一定时调整信息调整第二节点的第一发送定时，或者是使用GNSS定时作为第一发送定时，以及根据同步类型指示信息确定第一发送定时的调整方式。

Description

发送定时的确定方法及设备、计算机可读存储介质 技术领域
本公开实施例涉及但不限于5G NR(New Radio)无线通信技术领域。
背景技术
无线通信的需求的一个目标就是追求在任何地方任何时间可以和任何人通信，这就需要无线网络有良好的覆盖。所以无线技术的一个重要课题就是在保证覆盖的同时提高小区布置的灵活性及系统容量，但是这种灵活性往往可能需要更多的基础设施的投入，所以在考虑成本的情况下，无线中继(relay)被认为是一个扩展覆盖和提高系统容量的一种方案。其中，在3GPP release10阶段中继(Relay)技术中，中继节点(RN,Relay Node)通过无线与基站相连实现回程(backhaul)，并以“基站”的身份向下属终端提供服务。在这个两跳网络中，由于RN自干扰，双工方式等因素的限制，“RN到基站的回程链路(backhaul link)”与“RN到终端的接入链路(Access link)”之间通过时分的方式复用(TDM)，并不支持空分复用(SDM)以及频分复用(FDM)。在当前的第五代(5G)无线通信系统标准化讨论中，提出了融合接入与回程(IAB，Integrated access and backhaul)技术，支持IAB的节点可以称为IAB node，IAB node与Release 10 RN不同，IAB可以支持多跳网络和更灵活的复用方式(TDM/FDM/SDM)。
发明内容
一方面，本公开提供了一种发送定时的确定方法，所述方法可以包括：第一节点下发第一定时调整信息给第二节点，所述第一定时调整信息用于调整所述第二节点的第一发送定时；或者，指示第二节点使用全球导航卫星系统GNSS定时作为所述第二节点的第一发送定时，所述第一发送定时为所述第二节点的下行发送定时。
另一方面，本公开还提供了一种发送定时的确定方法，所述方 法可以包括：第二节点接收第一节点发送的第一定时调整信息，根据所述第一定时调整信息调整所述第二节点的第一发送定时；或者第二节点使用全球导航卫星系统GNSS定时作为第一发送定时，所述第一发送定时为所述第二节点的下行发送定时。
另一方面，本公开还提供了一种发送定时的确定设备，所述设备可以包括：发送模块，配置为通过第一节点下发第一定时调整信息给第二节点，所述第一定时调整信息用于调整所述第二节点的第一发送定时，和/或，通过第一节点下发同步类型指示信息给第二节点，所述同步类型指示信息包括以下至少之一：全球导航卫星系统GNSS定时，空中接口OTA/基站定时；所述同步类型指示信息用于确定第一发送定时的调整方式，其中所述第一节点为所述第二节点的父节点，所述第一发送定时为所述第二节点的下行发送定时。
另一方面，本公开还提供了一种发送定时的确定设备，所述设备可以包括：接收模块，配置为接收第一节点发送的第一定时调整信息，根据所述第一定时调整信息调整第二节点的第一发送定时；或者使用GNSS定时作为第一发送定时，所述第一发送定时为所述第二节点的下行发送定时。
另一方面，本公开还提供了一种通信设备，所述设备可以包括处理器、存储器、通信单元和通信总线；所述通信总线配置为实现所述处理器、所述通信单元和所述存储器之间的通信连接；所述处理器配置为执行存储器中存储的一个或者多个第一程序，以实现本文所述的方法的步骤；所述处理器还配置为执行存储器中存储的一个或者多个第二程序，以实现本所述的方法的步骤。
另一方面，本公开实施例还提供了一种计算机可读存储介质，所述计算机可读存储介质存储有一个或者多个第一计算机程序和一个或多个第二计算机程序，所述一个或者多个第一计算机程序可被一个或者多个处理器执行，以实现本文所述的方法的步骤；所述一个或者多个第二计算机程序可被一个或者多个处理器执行，以实现本文所述的方法的步骤。
附图说明
图1为IAB技术下的典型的多跳网络的结构示意图；
图2为本公开实施例基于父节点侧的发送定时的确定方法的流程图；
图3为本公开实施例基于子节点侧的发送定时的确定方法的流程图；
图4为本公开实施例基于终端侧的发送定时的确定方法的流程图；
图5为本公开实施例的发送定时的确定设备的结构示意图；
图6为本公开实施例的发送定时的确定设备的另一种结构示意图；
图7为本公开实施例的终端的结构示意图；
图8为本公开实施例的通信设备的结构示意图；
图9为本公开实施例的发送定时的确定方法的另一流程图。
具体实施方式
为了使本公开的目的、技术方案及优点更加清楚明白，下面通过具体实施方式结合附图对本公开实施例作进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本公开，并不用于限定本公开。
对于IAB技术下的多跳网络，一种典型的结构如图1所示。其中，与核心网存在直接连接(例如存在有线连接)的节点称为IAB donor，或者donor node(施主节点)，其可以获得下行数据或者将上行数据发送给核心网。IAB节点(IAB node)通过无线连接到其关联的parent IAB node(父IAB节点)，例如图中，IAB节点2的parent IAB node为IAB节点1，而IAB节点1的parent IAB node就是施主节点。IAB node以类似UE的方式接入到parent IAB node。
无论是IAB donor还是IAB node均支持终端(UE)的接入，为了避免不同跳数(hop)的IAB node在服务UE时互相干扰，保持所有IAB node(包括donor node)之间互相同步是非常重要的，一种保持 同步的简单方式为使用OTA(over the air)的方式进行同步，例如在传统的TA(time advance)机制下，基站调整UE的上行发送定时，TA值为传播时延的两倍。对于IAB node若要和parent保持同步，即下行定时对齐，则需要提前自己的下行发送定时，提前量为parent node指示的TA值的一半，这样就可以通过传统的TA机制，即确定了IAB node作为child node或UE与parent node通信时的发送定时，又确定了IAB node作为基站服务其下属的child node或UE的发送定时。但是在支持FDM或SDM的场景下，需要IAB node可以同时接收parent node的下行数据以及child node(子节点)或UE的上行数据，和/或同时发送数据给parent node以及child node或UE。为了支持FDM或SDM，会对传统的TA机制有影响，例如TA值可能不再是传播时延的两倍，此时传统的TA过程可能无法同时满足OTA同步和FDM或SDM的需求，另外，同步过程也必须要考虑IAB node有GNSS(Global Navigation Satellite System)定时能力的场景。
因此，本公开特别提供了发送定时的确定方法及设备、计算机可读存储介质，其基本上避免了由于相关技术的缺点和局限所导致的问题中的一个或多个。
图2为本公开实施例提供的一种基于父节点侧的发送定时的确定方法。在本实施例中，父节点称为第一节点，父节点下的子节点称为第二节点，而分别设置于父节点或者子节点下的终端UE称为下级设备。在本实施例中，所述第二节点可以包括多个。该多个第二节点可以是都与父节点连接，也可以是链式的依次连接。
在本实施例中，对于父节点一侧的发送定时的确定方法主要是向其下级节点或者终端发送用于实现双向的发送定时的同步调整定时的过程。所述方法可以包括步骤S201和步骤S202。
在步骤S201，第一节点根据自身的决定或者网络配置确定下发的定时同步类型。
例如，所述定时同步类型可以包括全球导航卫星系统GNSS定时和/或空中接口OTA/基站定时。
在实际应用中，并不是所有的节点或者终端都支持GNSS的定时类型，但是所有的节点或者终端都支持OTA/基站的定时类型，而两种定时类型中，GNSS定时的类型可以是优选的。此时，在第一节点下发的同步类型指示信息中，以GNSS的优先级最高发送或者指示同步类型为GNSS定时，如果第一节点不支持GNSS或者自身不想使用GNSS，或网络配置或者第一节点的父节点配置为不使用GNSS，则在发送同步类型指示信息时不以GNSS的优先级最高发送，例如以OTA/基站定时类型为最高优先级或者指示同步类型为OTA/基站定时，同时还会将同步类型指示信息告知第二节点或者终端，从而保证两者之间的定时正常。
在步骤S202，第一节点下发第一定时调整信息给第二节点，或指示第二节点使用GNSS定时作为所述第二节点的第一发送定时。
在本实施例中，所述第一定时调整信息用于调整所述第二节点的第一发送定时，所述同步类型指示信息包括以下至少之一：全球导航卫星系统GNSS定时，空中接口OTA/基站定时，所述同步类型指示信息用于确定第一发送定时的调整方式，其中所述第一节点为所述第二节点的父节点，所述第一发送定时为所述第二节点的下行发送定时。
在本实施例中，第一定时调整信息主要是针对于第一节点使用OTA/基站定时的方式调整时，其直接下发的是第一定时调整信息，而对于GNSS定时的方式时，其下发的是GNSS定时类型，直接指示第二节点使用GNSS定时作为第一发送定时。
进一步的，其还可以是以下发同步类型指示信息的方式来实现，第一节点支持两种定时方式(即GNSS定时和OTA/基站定时)时，第一节点会下发同步类型指示信息，通过同步类型指示信息来确定定时的方式，如果确定是使用OTA/基站定时的方式调整时，其直接下发的是第一定时调整信息，如果确定使用的是GNSS定时类型，直接指示第二节点使用GNSS定时作为第一发送定时。
在实际应用中，所述同步类型指示信息还可以用于指示第一节点上当前使用的定时同步类型，而第二节点则根据同步类型指示信息确定第二节点的定时同步类型或者模式。
根据确定的定时同步类型或模式确定所述第二节点的第一发送定时和/或第二发送定时的确定方法，其中所述第一节点为所述第二节点的父节点，也即是用于控制第二节点的上行发送定时或者下行发送定时的定时调整使用的方法。
在本实施例中，所述第一发送定时为所述第二节点的下行发送定时，所述第二发送定时为所述第二节点的上行发送定时。
所述定时同步类型以以下方式中的一种存在于所述同步类型指示信息中：GNSS使能标志、指示定时同步类型信息、指示同步类型优先级信息。
也即是说，第一节点在下发定时同步类型时，会选择以下三种情况进行发送：1)以GNSS使能标志的方式来推送，该种方式一般指示使用GNSS或者不使用GNSS，在一个示例性实施例中，若指示使用GNSS且第二节点支持GNSS则第二节点应使用GNSS定时类型，否则，第二节点应当选择OTA/基站的类型使用；或者2)直接将对应支持的类型推送，根据类型的指示选择对应的即可；或者直接将对应使用的类型推送，在一个示例性实施例中，若指示GNSS定时类型，且第二节点支持GNSS则第二节点应使用GNSS定时类型，否则,第二节点应当选择OTA/基站的类型使用；或者3)以优先级的方式推送，该优先级指示了多种定时同步类型的优先顺序，然后第二节点根据优先级的先后顺序选择自身也支持的方式与第一节点进行同步调整发送定时。在一个示例性实施例中，第二节点也可以下发定时同步类型给其子节点或终端，该同步类型指示可以与第一节点下发的定时同步类型指示相同。
在本实施例中，第二节点可以发送或者终端自身可以发送是否支持某种同步类型的指示信息给第一节点，例如是否支持GNSS定时的能力信息。
在本实施例中，当第一节点下发的是同步类型指示信息时，对于在第二节点接收到同步类型指示信息后，若发现第二节点或者终端自身不再支持第一节点指示的类型时，或者指示的类型不可用时，则第一节点还包括接收来自第二节点或者终端的更变定时同步类型的 请求消息，该请求消息可以是以GNSS状态信息或者能力信息的方式推送；又或者，在本实施例中，对于在第二节点接收到同步类型指示信息为GNSS，若开始时第二节点的GNSS定时不可用，第二节点选择了OTA同步定时方式，但是第二节点之后发现GNSS变得可靠，即可用，则第一节点还包括接收来自第二节点或者终端的更变定时同步类型的请求消息，该请求消息可以是以GNSS状态信息或者能力信息的方式推送。但是本实施例中，并不限定一定是以上述的两种方式进行推送，只要能体现需要变更定时同步类型的方式都可以。
在一个示例性实施例中，第一节点根据请求消息调整上述第二节点的定时同步类型，并向第二节点或者终端反馈应答消息，从而使得第二节点或者终端获知以调整，最后，两者以调整后的类型进行发送定时的同步调整，最终确定发送定时。
在本实施例中，所述第一定时调整信息可以包括同步调整信息，所述同步调整信息包括以下调整量中的一种：相对于所述第一节点发送的信号在所述第二节点的下行接收定时的第一调整量ΔT a、相对于所述第二节点的第二发送定时的第二调整量ΔT b、相对于所述第二节点当前的第一发送定时的第三调整量ΔT c。相应地，在下发定时同步类型对第二节点的所述第一发送定时的调整时，可以通过以下三种方式进行调整。
方式一，若所述同步调整信息为第一调整量ΔT a时，根据所述第一调整量中指示的数值将所述下行接收定时T 1进行提前得到所述第一发送定时，所述第一发送定时为T 1-ΔT a。
方式二，若所述同步调整信息为第二调整量ΔT b时，将当前的第二发送定时T 2调整ΔT b得到所述第一发送定时，所述第一发送定时为T 2-ΔT b。
方式三，若所述同步调整信息为第三调整量ΔT c时，将当前的第一发送定时T old调整ΔT c得到所述第一发送定时，所述第一发送定时为T 2-ΔT c，或者将当前的第一发送定时的调整量ΔT a，old调整ΔT c得到所述第一发送定时新的调整量ΔT a，new＝ΔT a，old+ΔT c,所述第一发送定时为T 1-ΔT a，new。
本实施例提供的发送定时的确定方法，通过向第二节点或者终端下发的同步类型指示信息，以同步类型指示信息控制第二节点调整第二节点自身的第一发送定时的方式，从而实现了多端之间的发送定时的同步定时调整，也使得了在5G NR中，可以保证了节点在实现同收或者同发时，节点间的发送定时的调整机制不会存在相互影响；同时也提高了IAB网络的数据传输效率和分配资源的利用率，进一步的还可以更好的满足节点或者UE的需求，提升用户体验。本方案易于实现，并且适用于各种不同场景。
图3为本公开实施例提供的一种基于子节点侧的发送定时的确定方法。在本实施例中，父节点称为第一节点，父节点下的子节点称为第二节点，而分别设置于父节点或者子节点下的终端UE称为下级设备。在本实施例中，所述第二节点可以包括多个。该多个第二节点可以是都与父节点连接，也可以是链式的依次连接。
在本实施例中，对于子节点一侧的发送定时的确定方法主要是根据第一节点(父节点)下发的同步类型指示信息调整自身的第一发送定时和/或第二发送定时，以及向其下级节点或者终端发送用于实现双向的发送定时的同步调整定时的过程。所述方法可以包括步骤S301和步骤S302。
在步骤S301，第二节点接收第一节点下发第一定时调整信息，或者使用GNSS定时。
在该步骤中，还可以通过下发同步类型指示信息的方式来实现定时同步类型的指示，在一个示例性实施例中，是基于第一节点同时支持所述GNSS定时和OTA/基站定时两种类型的情况下发送，所述同步类型指示信息用于确定所述第一节点当前使用的定时同步类型，所述定时同步类型包括全球导航卫星系统GNSS定时和/或空中接口OTA/基站定时。
在本实施例中，第一定时调整信息主要是针对于第一节点使用OTA/基站定时的方式调整时，其直接下发的是第一定时调整信息，而对于GNSS定时的方式时，其下发的是GNSS定时类型，直接指示第二 节点使用GNSS定时作为第一发送定时。
进一步的，其还可以是以下发同步类型指示信息的方式来实现，第一节点支持两种定时方式(即GNSS定时和OTA/基站定时)时，第一节点会下发同步类型指示信息，通过同步类型指示信息来确定定时的方式，如果确定是使用OTA/基站定时的方式调整时，其直接下发的是第一定时调整信息，如果确定使用的是GNSS定时类型，直接指示第二节点使用GNSS定时作为第一发送定时。
进一步的，若第二节点在接收到同步类型指示信息指示的是GNSS定时时，而第二节点又不支持GNSS或者是认为GNSS不可靠，则会选择与第一节点交互协商来重新确定定时调整方式。
在实际应用中，并不是所有的节点或者终端都支持GNSS的定时类型，但是所有的节点或者终端都支持OTA/基站的定时类型，而两种类型中，GNSS定时的类型可以是优选的。此时，在第一节点下发的同步类型指示信息中基本上是以GNSS的优先级最高发送或者指示同步类型为GNSS定时，如果第一节点不支持GNSS或者自身不想使用GNSS，或网络配置或者第一节点的父节点配置为不使用GNSS，则在发送同步类型指示信息时不以GNSS的优先级最高发送，例如以OTA/基站定时类型为最高优先级或者指示同步类型为OTA/基站定时，同时还会将同步类型指示信息告知第二节点或者终端，从而保证两者之间的定时正常。
在步骤S302，根据所述第一定时调整信息调整所述第二节点的第一发送定时，或者确定使用GNSS定时作为所述第二节点的第一发送定时。
所述第一发送定时为所述第二节点的下行发送定时，所述第二发送定时为所述第二节点的上行发送定时。
在本实施例中，所述第二节点在调整所述第一发送定时时，还可以通过GNSS定时的方式来调整，即是直接使用GNSS定时作为第一发送定时。第二节点可以根据自身的决定或者网络配置确定使用GNSS定时。
在本实施例中，对于所述第一定时调整信息的获取，还可以是 第二节点首先接收到第一节点下发的同步类型指示信息后，根据同步类型指示信息确定对应的调整方式；若调整方式为GNSS定时时，直接使用GNSS定时作为第一发送定时；若调整方式为OTA/基站定时时，第二节点接收第一节点下发的第一定时调整信息，根据第一定时调整信息调整所述第一发送定时。
在本实施例中，在所述第二节点接收第一节点发送的第一定时调整信息或者在所述第二节点使用GNSS定时作为所述第二节点的第一发送定时之前，所述方法还可以包括：第二节点接收第一节点发送的同步类型指示信息，确定使用GNSS定时的定时同步类型和/或确定使用OTA/基站定时的定时同步类型；根据所述定时同步类型确定对应的所述第一发送定时的调整方式；所述调整所述第二节点的第一发送定时包括：根据所述调整方式接收到的所述第一定时调整信息调整所述第二节点的第一发送定时，或者将使用的GNSS定时作为所述第二节点的第一发送定时。
在本实施例中，若第一节点下发的是同步类型指示信时，所述定时同步类型以以下方式中的一种存在于所述同步类型指示信息中：GNSS使能标志、指示定时同步类型信息、指示同步类型优先级信息。
也即是说，第一节点在下发定时同步类型时，会选择以下三种情况进行发送：1)以GNSS使能标志的方式来推送，但是该种方式一般只能指示支持GNSS或者不支持GNSS，若不支持，则第二节点应当自动选择OTA/基站的类型使用；或者2)直接将对应支持的类型推送，根据类型的只是选择对应的即可；或者3)以优先级的方式推送，该优先级是优选的以第一节点的支持方式为最高优先级，然后第二节点根据优先级的先后顺序选择自身也支持的方式与第一节点进行同步调整发送定时。
在本实施例中，在所述第二节点接收第一节点发送的同步类型指示信息，确定使用全球导航卫星系统GNSS定时的定时同步类型和/或确定使用空中接口OTA/基站定时的定时同步类型之后，还可以包括：根据所述定时同步类型确定对应的所述第一发送定时的调整方式；以及基于所述调整方式调整所述第一发送定时。
在本实施例中，若所述同步类型指示信息中指示的是GNSS定时，在步骤S302之前，所述方法还可以包括：确定所述第二节点本身是否支持GNSS定时；若支持，则将所述GNSS定时作为所述第二节点对其下行发送定时的定时同步类型；若不支持，则向所述第一节点发送将所述定时同步类型调整为OTA/基站定时的请求，所述请求包括自身的GNSS状态信息或者能力信息。
也即是说若所述同步类型指示信息中指示的是GNSS定时的定时同步类型，且确定所述第二节点本身支持GNSS定时，则确定使用所述GNSS定时的定时同步类型，将所述GNSS定时作为所述第二节点的第一发送定时；否则，确定使用所述OTA/基站定时的定时同步类型；接收第一节点发送的第一定时调整信息，根据所述第一定时调整信息调整所述第二节点的第一发送定时。
对于不支持的情况，第一节点在下发定时同步类型时，会选择以下三种情况进行发送：1)以GNSS使能标志的方式来推送，该种方式一般指示使用GNSS或者不使用GNSS，在一个示例性实施例中，若指示使用GNSS且第二节点支持GNSS则第二节点应使用GNSS定时类型，否则，第二节点应当选择OTA/基站的类型使用；或者2)直接将对应支持的类型推送，根据类型的指示选择对应的即可；或者直接将对应使用的类型推送，在一个示例性实施例中，若指示GNSS定时类型，且第二节点支持GNSS则第二节点应使用GNSS定时类型，否则,第二节点应当选择OTA/基站的类型使用；或者3)以优先级的方式推送，该优先级指示了多种定时同步类型的优先顺序，然后第二节点根据优先级的先后顺序选择自身也支持的方式与第一节点进行同步调整发送定时。在一个示例性实施例中，第二节点也可以下发定时同步类型给其子节点或终端，该同步类型指示可以与第一节点下发的定时同步类型指示相同。
在本实施例中，第二节点可以发送或者终端自身可以发送是否支持某种同步类型的指示信息给第一节点，例如是否支持GNSS定时的能力信息。
在第二节点本身支持GNSS定时的情况下，第二节点对于第一发 送定时和第二发送定时的调整直接将GNSS定时作为第一发送定时，或者是第二发送定时。或者是将所述GNSS定时中定时设置作为所述第二节点的第一发送定时。
在本实施例中，若所述定时同步类型为OTA/基站定时时，所述同步类型指示信息中还包括，OTA/基站定时的模式/类型/方式的信息，即OTA/基站定时可以包括多种类型。
在本实施例中，若系统或标准只支持OTA/基站定时时，则第一节点不再发送同步类型指示信息，第二节点默认采用OTA/基站定时的方式。又或者系统或标准设置一种默认的定时同步类型，若没有发送同步类型指示信息时，则相当于指示定时同步类型为默认的定时同步类型，默认的定时同步类型可以是OTA/基站定时或GNSS定时，也可以是某一种OTA/基站定时的模式。
若确定的所述定时同步类型为OTA/基站定时或默认使用OTA/基站定时时，所述通过所述同步类型指示信息中指示的定时同步类型确定的方式或者通过OTA/基站定时方式调整第一发送定时包括：接收第一节点(父节点)发送的时间调整信息，根据所述调整信息调整所述第二节点的第一发送定时。
在实际应用中，节点或者终端在通过GNSS定时和OTA/基站定时的两种方式中，其调整和确定发送定时的方式是不相同的，因此，在以OTA/基站定时的方式中，还需要从上级节点(父节点)接收用于调整发送定时的时间调整信息，根据所述调整信息调整所述第二节点或者终端的第一发送定时。
在本实施例中，所述调整信息通过接收所述第一节点下发的用于指示所述第二节点的下行发送定时调整的第一发送定时调整消息(例如，第一定时调整信息)中获得。
在本实施例中，可以使用多种OTA/基站定时的模式/类型/方式确定第一发送定时，具体的使用哪一种可以从第一节点发送的同步类型指示信息中获得，也可以从调整消息中获得。在一个示例性实施例中，OTA/基站定时的模式/类型/方式可以包括：
一种OTA/基站定时的模式/类型/方式为，所述第一发送定时调 整消息为同步调整信息，所述同步调整信息包括以下调整量中的至少一种：相对于所述第一节点发送的信号在所述第二节点的下行接收定时的第一调整量ΔT a、相对于所述第二节点的第二发送定时(例如第二节点的上行发送定时)的第二调整量ΔT b、相对于所述第二节点当前的第一发送定时的第三调整量ΔT c，或第三调整量ΔT c也可以理解为相对于所述第二节点当前的第一调整量ΔT a的变化量。
在本实施例中，所述方法还可以包括：获取所述第一节点发送的OTA/基站定时的模式指示信息，所述模式指示信息指示的OTA/基站定时的模式包括以下至少之一：
所述第一发送定时调整消息为同步调整信息的模式一；
所述第一发送定时调整消息为时间调整信息的模式二；
所述第一发送定时调整消息为时间调整信息的模式三。
在本实施例中，所述模式一、模式二和模式三指的是下面的调整过程。
在本实施例中，若所述模式指示信息指示为模式一，且所述同步调整信息为第一调整量ΔT a时，所述调整所述第二节点的第一发送定时包括：将所述第二节点的下行接收定时T 1进行提前ΔT a得到所述第一发送定时，所述第一发送定时为T 1-ΔT a；
或者，若所述调整模式指示信息指示为模式一，且所述同步调整信息为第二调整量ΔT b时，所述调整所述第二节点的第一发送定时包括：将当前的第二发送定时T 2调整ΔT b得到所述第一发送定时，所述第一发送定时为T 2-ΔT b；所述第二发送定时为所述第二节点向所述第一节点进行发送的发送定时。
或者，若所述调整模式指示信息指示为模式一，且所述同步调整信息为第三调整量ΔT c时，所述调整所述第二节点的第一发送定时包括：将当前的第一发送定时T old调整ΔT c得到新的所述第一发送定时，所述第一发送定时为T old-ΔT c。
在本实施例中，若所述调整模式指示信息指示为模式二时，所述时间调整信息包括时间提前量TA、变化调整量ΔTA中的一种；所述变化调整量ΔTA为相对于上一次的时间提前量TA的变化量。
在本实施例中，在所述第一发送定时调整消息为同步调整信息时，其调整方式还包括以下三种方式。
方式一，若所述同步调整信息为第一调整量ΔT a时，所述调整所述第二节点的第一发送定时包括：根据所述第一调整量中指示的数值将所述下行接收定时T 1进行提前得到所述第一发送定时，所述第一发送定时为T 1-ΔT a。
方式二，若所述同步调整信息为第二调整量ΔT b时，所述调整所述第二节点的第一发送定时包括：将当前的第二发送定时T 2调整ΔT b得到所述第一发送定时，所述第一发送定时为T 2-ΔT b。
方式三，若所述同步调整信息为第三调整量ΔT c时，所述调整所述第二节点的第一发送定时包括：将当前的第一发送定时T old调整ΔT c得到所述第一发送定时，所述第一发送定时为T 2-ΔT c，或者将当前的第一发送定时的调整量ΔT a，old调整ΔT c得到所述第一发送定时新的调整量ΔT a，new＝ΔT a，old+ΔT c,所述第一发送定时为T 1-ΔT a，new。
在该模式下，第二节点或终端使用传统的时间提前量TA调整信息调整自己的第二发送定时，即上行发送定时。
除了上述模式，其他的模式还包括，在所述第一发送定时调整消息为时间提前量TA调整信息时，所述时间提前量TA调整信息包括时间提前量TA、变化调整量ΔTA中的一种；所述变化调整量ΔTA为相对于上一次的(即当前的)时间提前量TA的变化量。
在本实施例中，所述第一发送定时调整消息为时间提前量TA调整信息时，所述时间提前量TA调整信息包括时间提前量TA、变化调整量ΔTA中的一种；所述变化调整量ΔTA为相对于上一次的时间提前量TA的变化量。
基于在所述第一发送定时调整消息为时间提前量TA调整信息时，其也包括两种OTA/基站定时的模式/类型/方式。
一种OTA/基站定时的模式/类型/方式为，当所述时间提前量TA调整信息为时间提前量TA时，即是若所述调整模式指示信息指示为模式二，所述根据所述TA调整所述第二节点的第一发送定时，包括：根据所述时间提前量TA指示的数值将所述下行接收定时T 1进行提前 获得所述第一发送定时，所述第一发送定时为T 1-TA-Ta_offset，Ta_offset为预配置的TA偏移；当所述时间调整信息为变化调整量ΔTA时，所述根据所述TA调整所述第二节点的第一发送定时和/或第二发送定时包括：根据所述变化调整量ΔTA以及上一次的时间提前量TA调整获得所述第一发送定时，所述第一发送定时为T 1-TA old-ΔTA–Ta_offset，Ta_offset为预配置的TA偏移。
在一个示例性实施例中，所述第一发送定时与所述第二发送定时相等，同样的，根据上述时间提前量TA消息调整所述第二节点的第二发送定时。
一种OTA/基站定时的模式/类型/方式为，当所述时间调整信息为时间提前量TA时，即是若所述调整模式指示信息指示为模式三，所述调整所述第二节点的第一发送定时可以包括：根据所述时间提前量TA指示的数值将所述下行接收定时T 1进行提前获得所述第一发送定时，所述第一发送定时为T 1-TA/2；在一个示例性实施例中，所述第二发送定时为T 1-TA-Ta_offset，Ta_offset为预配置的TA偏移。
当所述时间提前量TA调整信息为变化调整量ΔTA时，所述根据所述TA调整所述第二节点的第一发送定时和/或第二发送定时包括：
根据所述变化调整量ΔTA以及上一次的时间提前量TA调整获得所述第一发送定时，所述第一发送定时为T 1-(TA old+ΔTA)/2。在一个示例性实施例中，所述第二发送定时为T 1-TA old-ΔTA–Ta_offset，Ta_offset为预配置的TA偏移。
在本实施例中，在第二节点或者终端确定是采用OTA/基站定时时，所述第二节点或者终端还需要确定选择以哪一种同步定时方式对发送定时进行调整。
在一个示例性实施例中，所述第一节点发送的同步类型指示信息中还包括，OTA/基站定时的模式/类型/方式的指示信息，则根据所述同步类型指示信息指示的模式/类型/方式选择同步定时方式对发送定时进行调整，即选择上述OTA/基站定时的模式/类型/方式的一种。
或者，所述第一发送定时调整消息还包括指示同步定时方式， 所述指示的定时模式/类型/方式为上述OTA/基站定时的模式/类型/方式的一种。
所述根据所述调整信息调整所述第二节点的第一发送定时和/或第二发送定时包括：根据所述指示OTA/基站定时的模式/类型/方式中选择的同步方式调整所述第一发送定时和/或第二发送定时。
例如通过指示同步定时方式指示了采用同步调整信息的方式进行调整发送定时，则在调整时，根据同步调整信息中的方式中选择一种进行调整，甚至还可以是通过指示同步定时方式直接指示到选择同步调整信息中哪一种进行调整。
在本实施例中，对于第二节点或者终端，在使用GNSS定时作为第一发送定时的过程中，若发送GNSS定时不可靠/不可用了，则需要进行定时同步类型的变更，具体的需要请求上级节点进行同时变更，其变更步骤包括：
若确定所述GNSS定时不可靠时，则所述第二节点向所述第一节点发送将所述定时同步类型调整为空中接口OTA/基站定时的请求，所述请求包括自身的GNSS状态信息或者能力信息；
根据调整后的所述OTA/基站定时重新调整所述第一发送定时和/或第二发送定时。可选的，所述第一发送定时调整消息为同步调整信息时，第一节点收到所述请求后，开始向所述第二节点发送所述用于调整第一发送定时的定时调整信息，即开始发送同步调整信息给第二节点。
又或者，在本实施例中，若所述同步类型指示信息中指示的是GNSS定时的定时同步类型,且确定所述GNSS定时可靠/可用时，则所述第二节点向所述第一节点发送将所述定时同步类型调整为GNSS定时的请求，所述请求包括自身的GNSS状态信息或者能力信息。也即是说对于在第二节点接收到同步类型指示信息为GNSS，若开始时第二节点的GNSS定时不可用，第二节点选择了OTA/基站定时方式调整第一发送定时，但是第二节点之后发现GNSS变得可靠，即可用，则第二节点向所述第一节点发送更变定时同步类型的请求消息，该请求消息可以是以GNSS状态信息或者能力信息的方式推送，例如请求 变更为GNSS定时。
若调整为GNSS为所述第一发送定时，则第二节点可以不再根据第一节点发送的定时调整信息调整第一发送定时，即使用GNSS定时作为第一发送定时。可选的，所述第一发送定时调整消息为同步调整信息时，第一节点收到所述请求后，可以不再向所述第二节点发送所述用于调整第一发送定时的定时调整信息，即停止发送同步调整信息给第二节点。
在本实施例中，在从所述第一节点接收所述同步类型指示信息之后，还包括：将接收到的所述同步类型指示信息下发至下级节点或者终端，所述下级节点为所述第二节点的子节点，所述终端为所述第二节点的下级设备。
在一些实施例中，所述第二节点在下发同步类型指示信息时，可以通过以下方式下发：
一种是可以直接转发第一节点发送的同步类型指示信息；
另一种是第二节点自己重新生成同步类型指示信息并发送给下级节点或者终端，同样的，这里发送给下级节点的同步指示信息中也是以GNSS使能标志、指示定时同步类型信息、指示同步类型优先级信息中的一种方式体现。
另外，这里发送给下级节点的同步指示信息中还可以包括，若所述定时同步类型为OTA/基站定时时，所述同步类型指示信息中还包括，OTA/基站定时的模式/类型/方式的指示信息。
在本实施例中，第二节点通过接收第一节点下发的同步类型指示信息，根据同步类型指示信息中指示的定时同步类型调整第二节点自身的第一发送定时和/或第二发送定时，以及控制第二节点下的子节点或者终端的上行发送定时，从而实现了多端之间的发送定时的同步定时调整，也使得了在5G NR中，可以保证了节点在实现同收或者同发时，节点间的发送定时的调整机制不会存在相互影响；同时也提高了IAB网络的数据传输效率和分配资源的利用率，进一步的还可以更好的满足节点或者UE的需求，提升用户体验。本方案易于实现，并且适用于各种不同场景。
图4为本公开实施例提供的一种基于终端侧的发送定时的确定方法，在本实施例中，父节点称为第一节点，父节点下的子节点称为第二节点，而分别设置于父节点或者子节点下的终端UE称为下级设备，当然在本实施例中，所述终端可以包括多个。该多个终端可以是都与父节点或者子节点连接。
在本实施例中，对于终端侧的发送定时的确定方法主要是根据第一节点(父节点)或者是第二节点(子节点)下发的同步类型指示信息调整自身的第二发送定时的同步调整定时的过程。如图4所示，所述方法可以包括步骤S401和S402。
在步骤S401，终端接收第一节点或第二节点下发的同步类型指示信息。
其中，所述同步类型指示信息用于确定所述第一节点或第二节点当前使用的定时同步类型，所述定时同步类型包括全球导航卫星系统GNSS定时和空中接口OTA/基站定时。
在实际应用中，并不是所有的终端都支持GNSS的定时类型，但是所有的终端都支持OTA/基站的定时类型，而两种定时类型中，GNSS定时的类型是优选的。此时，在第一节点或者第二节点下发的同步类型指示信息中，基本上是以GNSS的优先级最高发送，如果第一节点或者第二节点都不支持GNSS的话，则在发送同步类型指示信息时以优先级排列的方式发送，同时还会将其自身的支持信息告知终端，从而保证两者之间的定时正常。
在步骤S402，通过所述同步类型指示信息中指示的定时同步类型调整自身的第二发送定时。
在本实施例中，所述第二发送定时为所述第二节点的上行发送定时，所述定时同步类型以以下方式中的一种存在于所述同步类型指示信息中：GNSS使能标志、指示定时同步类型信息、指示同步类型优先级信息。
也即是说，第一节点在下发定时同步类型时，会选择以下三种情况进行发送：1)以GNSS使能标志的方式来推送，但是该种方式一 般只能指示支持GNSS或者不支持GNSS，若不支持，则第二节点应当自动选择OTA/基站的类型使用；或者2)直接将对应支持的类型推送，根据类型的指示选择对应的即可；或者3)以优先级的方式推送，该优先级是优选的以第一节点的支持方式为最高优先级，然后第二节点根据优先级的先后顺序选择自身也支持的方式与第一节点进行同步调整发送定时。
在本实施例中，若所述同步类型指示信息中指示的是GNSS定时，在步骤S402之前，所述方法还包括：确定所述终端本身是否支持GNSS定时；若支持，则将所述GNSS定时作为所述终端对其下行发送定时的定时同步类型；若不支持，则向所述第一节点或者第二节点发送将所述定时同步类型调整为OTA/基站定时的请求，所述请求包括自身的GNSS状态信息或者能力信息。
在本实施例中，终端通过接收第一节点或者第二节点下发的同步类型指示信息，根据同步类型指示信息中指示的定时同步类型调整终端自身的第二发送定时，从而实现了多端之间的发送定时的同步定时调整，也使得了在5G NR中，可以保证了节点在实现同收或者同发时，节点间的发送定时的调整机制不会存在相互影响；同时也提高了IAB网络的数据传输效率和分配资源的利用率，进一步的还可以更好的满足节点或者UE的需求，提升用户体验。本方案易于实现，并且适用于各种不同场景。
下面结合各种应用场景来对本公开实施例提供发送定时的确定方法进行详细说明，以图1所示的IAB网络结构为例进行说明。
基于图1的网络结构，IAB网络中为了保证所有IAB节点的下行发送能够同步，一种简单的方式为让所有IAB node都使用绝对的时间进行定时，例如利用卫星系统获得定时，例如GNSS定时，从而不同的IAB node都可以衍生出相同的下行发送的帧、子帧、slot以及符号的编号和位置边界，需要说明的是这里的同步可以是所有IAB node的定时的帧边界、子帧边界、slot边界或符号边界是对齐的，但是GNSS并不一定会每个IAB都会支持，另外，由于各种因素，GNSS 也可能失效，例如在恶劣天气下，卫星信号以及GNSS定时可能无法获取，此时可能仍然使用基站通过空口(over the air)的交互进行同步。所以考虑GNSS定时，一种IAB节点的同步或发送定时确定方法可以如下面例子所述。
在一个示例中，网络结构如图1所示，其包括核心网，以及与核心网有线连接的施主节点，以及与施主节点无线连接的IAB节点1、IAB节点2和连接在IAB节点1、IAB节点2下的终端UE。
在本实施例中，假设施主节点和IAB节点2支持GNSS，IAB节点1不支持GNSS，而施主节点根据自身的决定或者网络的配置确定使用GNSS定时，其控制过程如下：
1)施主节点向IAB节点1通知同步类型指示信息，这些信息可以为，GNSS使能标志，或者指示同步(源)类型(例如类型可以为OTA/基站,GNSS)，或指示同步优先级。并且施主节点通知使能GNSS或使用GNSS的方法可以为：GNSS使能标志为真，或者将同步类型或/最高优先级设为GNSS。
2)IAB节点1获得同步类型指示信息，发现施主节点使能或正在使用GNSS定时，但是IAB节点1并不支持GNSS，所以IAB节点1仍然需要使用OTA的方式与施主节点同步；另外，IAB节点1可以向施主节点发送GNSS的状态或能力信息，指示是否支持GNSS或GNSS是否可用，这样施主节点可以确定是否使用OTA过程进行同步。
3)同时,IAB节点1将同步类型指示信息指示给子节点IAB节点2，IAB节点1可以直接转发施主节点发送的同步类型指示信息，或者自己生成同步类型指示信息并发送给子节点，同样的，这里假设发送给子节点的同步指示信息里使能了GNSS，虽然IAB节点1无法使用GNSS定时。
4)IAB节点2获得同步类型指示信息，发现IAB节点1使能GNSS定时，且IAB节点2的支持GNSS定时，此时IAB节点2将使用GNSS作为下行发送定时，而不需要OTA同步过程。同样的，IAB节点2可以向IAB节点1发送GNSS的状态或能力信息。
在另一个例子中，仍然如图1所示(两个IAB节点的场景可以很 容易扩展到其他跳数的场景)，假设施主节点不使能GNSS，例如发送的类型指示信息中指示使用基站的定时或者OTA方式进行同步，此时即使IAB节点1支持GNSS也要使用OTA的方式和施主节点进行同步，同样的，IAB节点2也要使用OTA方式与IAB节点1进行同步。
在本实施例中，对于终端，在使用GNSS定时来调整发送定时的过程中，若发送GNSS定时不可靠了，则需要进行定时同步类型的变更。在这种情况下，终端需要请求上级节点进行同时变更，其变更步骤可以包括：若确定所述GNSS定时不可靠时，则所述终端向所述第一节点或者所述第二节点发送将所述定时同步类型调整为空中接口OTA/基站定时的请求，所述请求包括自身的GNSS状态信息或者能力信息；根据调整后的所述OTA/基站定时重新调整所述第一发送定时和/或第二发送定时，这将在以下示例中讨论。
在一个示例中，网络结构如图1所示，假设施主节点和IAB节点2支持GNSS，IAB节点1不支持GNSS，而施主节点根据自身的决定或者网络的配置确定使用GNSS定时，如上述示例中所述，IAB节点1将使用OTA的方式与施主节点进行同步，确定发送定时；IAB节点2将使用GNSS定时。
但是由于各种因素，IAB节点2的GNSS定时不再可靠，此时IAB节点2需要向IAB节点1发送OTA同步请求或者GNSS状态信息，用于请求使用OTA同步。又或者，IAB节点1更改了同步类型指示信息，不再使用GNSS，例如将同步类型设为OTA同步，此时，IAB节点2也需要按照OTA的方式进行同步，确定自己的下行发送定时。
或者，网络结构如图1所示，假设施主节点、IAB节点1和IAB节点2都支持GNSS，但IAB节点1在开始时GNSS不可用，而施主节点根据自身的决定或者网络的配置确定使用GNSS定时，如上述示例所述，IAB节点1将使用OTA的方式与施主节点进行同步，确定发送定时；IAB节点2将使用GNSS定时。
若IAB节点1的GNSS定时变的可靠或可用，此时IAB节点1需要向施主节点发送GNSS状态信息，用于请求使用GNSS定时。此时， 施主节点可以停止和IAB节点1的OTA同步过程，IAB节点1使用GNSS确定自己的下行发送定时。
在本公开中，对于终端或者IAB节点是以OTA/基站定时的方式进行发送的定时的同步时，其通过接收同步调整信息或者时间调整信息的方式实现，在同步调整信息或者时间调整信息中可以分为以下三个调整模式。
模式一，第一定时调整(提前)消息指示了节点下行发送的同步调整信息，例如，指示了调整量ΔT a，为相对于父节点发送的信号在所述节点的定时(下行接收定时)的调整量；或者，指示了调整量ΔT b，为相对于所述节点的第二发送定时的调整量；或者，指示了调整量ΔT c，为相对于所述节点当前的第一发送定时的调整量，也可以说为相对于当前第一定时的调整量的调整量；
这里需要说明的是，若同步调整信息可以唯一确定所述ΔT a，ΔT b，或者ΔT c，则等同于指示了ΔT a，ΔT b，或者ΔT c，例如以ΔT a为例如果调整信息指示了ΔT a的倍数或者一个基于ΔT a运算得到的值(例如将ΔT a加上或减去若干个符号长度)，或者指示了ΔT a的一个索引，通过该索引(index or indicator)可以获得相应的ΔT a，这些方式都等同指示了ΔT a。
模式二，第一定时调整(提前)消息为TA调整(提前)信息，具体的：TA调整(提前)信息指示了调整量TA，或者指示了调整量ΔTA，则确定第一定时调整量TA＝TA old+ΔTA，TA old为收到调整消息之前使用的调整量，则第一定时为T 1-TA-TAoffset，T 1为父节点发送的信号在所述节点的定时(下行接收定时)，上述ΔT 1为TA+TA_offset，这里的TA_offset为预配置的TA偏移。
模式三，第一定时调整(提前)消息为TA调整(提前)信息，具体的：TA调整(提前)信息指示了调整量TA，或者指示了调整量ΔTA，则确定第一定时调整量TA＝TA old+ΔTA，TA old为收到调整消息之前使用的调整量，则第一定时为T 1-TA/2，T 1为父节点发送的信号在所述节点的定时(下行接收定时)，上述ΔT 1为TA/2。
在本实施例中，以模式二为例说明：
如图1所示，假设IAB节点1的下行发送定时与上行发送定时相同，下行发送定时为发送给IAB节点2或者连接到IAB节点1的UE时使用的定时，上行发送定时为发送给父节点(此场景中为施主节点)的定时。此时，可以使用上行发送TA过程确定上行发送定时，同时也就确定了下行发送定时。
施主节点会给IAB节点1发送TA调整信息，包括两类，一类TA调整(提前)信息直接指示了调整量TA，即直接根据指示的数值将下行接收定时进行提前，另一类则指示了调整量ΔTA，即指示相对于以前的TA调整量新增的调整量，即TA＝TA old+ΔTA，TA old为收到调整消息之前使用的调整量，则第一定时即下行发送定时等于第二发送定时(即为上行发送定时)为T 1-TA-TAoffset，T 1为父节点发送的信号在所述节点的定时(下行接收定时)，这里的TA_offset为预配置的TA偏移，该值可能跟频段，或者载波使用的方式有关，为系统预定义的值，例如，对于FDD载波(使用一对载波分别对应上下行)改值为0,对于TDD载波(时分双工，不是一对载波)一般不为0，为根据载波频段协议预设的值，一般该值对应该TDD载波的收发或发收转换时间。即最终，这里第一定时的调整量ΔT 1为TA+TA_offset。
对于模式三，如图1所示，假设IAB节点1的下行发送定时与上行发送定时虽然不同，但是仍然可以从上行发送定时调整的TA信令中获取下行发送定时。
施主节点会给IAB节点1发送TA调整信息，包括两类，一类TA调整(提前)信息直接指示了调整量TA，即直接根据指示的数值将下行接收定时进行提前，另一类则指示了调整量ΔTA，即指示相对于以前的TA调整量新增的调整量，即TA＝TA old+ΔTA，TA old为收到调整消息之前使用的调整量，则如上述示例所述第二发送定时(即为上行发送定时)仍然为T 1-TA-TAoffset，但是第一定时即下行发送定时则为T 1-TA/2，T 1为父节点发送的信号在所述节点的定时(下行接收定时)，这里的TA_offset如上述示例所述。即最终，这里第一定时的调整量 ΔT 1为TA/2。
在一个示例性实施例中，如图1所示，假设IAB节点1的下行发送定时单独进行调整和维护，不再使用TA调整信令，即需要新的信令，第二发送定时还是按照上述示例的方法进行调整。
新的信令可以为同步调整信息指示了调整量ΔT a，为相对于父节点发送的信号在所述节点的定时(下行接收定时)的调整量；或者，指示了调整量ΔT b，为相对于所述节点的第二发送定时的调整量；或者，指示了调整量ΔT c，为相对于所述节点当前的第一发送定时的调整量，也可以说为相对于当前第一定时的调整量的调整量。
方式一，若所述同步调整信息为第一调整量ΔT a时，所述根据所述TA调整所述第二节点的第一发送定时包括：根据所述第一调整量中指示的数值将所述下行接收定时进行提前得到所述第一发送定时，所述第一发送定时为T 1-ΔT a。
方式二，若所述同步调整信息为第二调整量ΔT b时，所述根据所述TA调整所述第二节点的第一发送定时包括：将当前的第二发送定时调整ΔT b得到所述第一发送定时，所述第一发送定时为T 2-ΔT b。
方式三，若所述同步调整信息为第三调整量ΔT c时，所述根据所述TA调整所述第二节点的第一发送定时包括：将当前的第一发送定时T old调整ΔT c得到所述第一发送定时，所述第一发送定时为T 2-ΔT c，或者将当前的第一发送定时的调整量ΔT a，old调整ΔT c得到所述第一发送定时新的调整量ΔT a，new＝ΔT a，old+ΔT c,所述第一发送定时为T 1-ΔT a，new。
这里需要说明的是，若同步调整信息可以唯一确定所述ΔT a，ΔT b，或者ΔT c，则等同于指示了ΔT a，ΔT b，或者ΔT c，例如以ΔT a为例如果调整信息指示了ΔT a的倍数或者一个基于ΔT a运算得到的值(例如将ΔT a加上或减去若干个符号长度)，或者指示了ΔT a的一个索引，通过该索引(index or indicator)可以获得相应的ΔT a，这些方式都等同指示了ΔT a。
又或者，施主节点会给IAB节点1发送OTA的调整信息,即同步调整信息，指示了调整量ΔT 1，为相对于父节点发送的信号在所述节点的定时(下行接收定时)的调整量；即直接根据指示的数值将下行接收定时进行提前ΔT 1获得第一发送定时；或者OTA的调整信息只是指示了相对于以前的OTA调整量的的调整量，即ΔT 1只是相对量，即指示相对于以前的调整量新增的调整量，此时只需要将当前使用的第一发送定时调整ΔT 1，也可以认为将以前的调整量调整了ΔT 1；又或者，OTA的调整信息指示了相对于当前使用的上行发送定时的调整量或偏移ΔT 1，即将当前的第二发送定时(上行发送定时)调整ΔT 1获得第一发送定时。
在一个实施例中，在不违背原则的情况下，也可以结合使用上述实施例中的方法，例如使用第一类TA调整命令(直接指示TA的数值)确定初始的第一发送定时，例如第一类TA调整命令一般在接入过程中使用，例如初始的第一发送定时的调整量ΔT 1为TA/2,在此之后，可以使用上述专用的第一定时调整信息进一步调整第一发送定时，而不是使用第二类TA调整命令来进一步调整第一发送定时，即是相当于第一发送定时和第二发送定时的初始信令是一个，但是后续的跟踪调整则使用各自的调整信令。
在本公开实施例中，对于在OTA/基站定时的方式中，存在模式一、二、三的调整方式，而在每个模式中还存在多个调整方式，因此，在上述的多个调整方式或者模式中，当网络可以选择多种OTA方式进行同步时，父节点必须指示子节点使用哪种方式或模式，例如父节点可以指示其OTA的同步模式为以上实施例中的一种，或者其他种类，子节点按照指示的种类对应的下行发送定时确定方法确定第一定时。即本实施用于说明，父节点发送OTA或者第一定时确定方式的信息给子节点。具体的可以携带在同步类型指示信息进行指示，或者使用第一定时调整信息进行指示。同样的，若系统或标准中只存在一种OTA/基站定时模式时，则第一节点不再需要指示OTA/基站定时模式的方式，第二节点默认采用系统或标准中只存在的OTA/基站定时模式。又或者系统或标准设置一种默认的OTA/基站定时模式，若没有收到 模式指示信息时，则使用默认的OTA/基站定时模式，默认的OTA/基站定时模式可以为上述模式一、二、三的调整方式中的一种。
在本公开实施例中，对于上述的发送定时的确定方法，还可以通过以下方式来实现，即是直接以发送同步类型指示信息的方式来通知，如图9所示，可以包括步骤S901和步骤S902。
在步骤S901，第二节点接收第一节点下发的同步类型指示信息。
其中，所述同步类型指示信息用于确定所述第一节点当前使用的定时同步类型，所述定时同步类型包括全球导航卫星系统GNSS定时和空中下载OTA/基站定时。
在实际应用中，并不是所有的节点或者终端都支持GNSS的定时类型，但是所有的节点或者终端都支持OTA/基站的定时类型，而两种定时类型中，GNSS定时的类型是优选的。在第一节点下发的同步类型指示信息中基本上是以GNSS的优先级最高发送，如果第一节点都不支持GNSS的话，则在发送同步类型指示信息时以优先级排列的方式发送，同时还会将其自身的支持信息告知第二节点或者终端，从而保证两者之间的定时正常。
在步骤S902，通过所述同步类型指示信息中指示的定时同步类型调整第一发送定时和/或第二发送定时。
其中，所述第一发送定时为所述第二节点的下行发送定时，所述第二发送定时为所述第二节点的上行发送定时。
所述定时同步类型以以下方式中的一种存在于所述同步类型指示信息中：GNSS使能标志、指示定时同步类型信息、指示同步类型优先级信息。
也即是说，第一节点在下发定时同步类型时，会选择以下三种情况进行发送：1)以GNSS使能标志的方式来推送，但是该种方式一般只能指示支持GNSS或者不支持GNSS，若不支持，则第二节点应当自动选择OTA/基站的类型使用；或者2)直接将对应支持的类型推送，根据类型的只是选择对应的即可；或者3)以优先级的方式推送，该优先级是优选的以第一节点的支持方式为最高优先级，然后第二节点 根据优先级的先后顺序选择自身也支持的方式与第一节点进行同步调整发送定时。
在本实施例中，若所述同步类型指示信息中指示的是GNSS定时，在步骤S902之前，还可以包括：确定所述第二节点本身是否支持GNSS定时；若支持，则将所述GNSS定时作为所述第二节点对其下行发送定时的定时同步类型；若不支持，则向所述第一节点发送将所述定时同步类型调整为OTA/基站定时的请求，所述请求包括自身的GNSS状态信息或者能力信息。
在第二节点本身支持GNSS定时的情况下，第二节点对于第一发送定时和第二发送定时的调整直接将GNSS定时作为第一发送定时，或者是第二发送定时。或者是将所述GNSS定时中定时设置作为所述第二节点的第一发送定时。
在本实施例中，若所述定时同步类型为OTA/基站定时时，所述通过所述同步类型指示信息中指示的定时同步类型调整第一发送定时和/或第二发送定时包括：接收父节点发送的时间提前量TA，根据所述TA调整所述第二节点的第一发送定时和/或第二发送定时。
在实际应用中，节点或者终端在通过GNSS定时和OTA/基站定时的两种方式中是，其调整和确定发送定时的方式是不相同的，因此，在以OTA/基站定时的方式中，还需要从上级节点(父节点)接收用于调整发送定时的时间提前量TA，根据所述TA调整所述第二节点或者终端的第一发送定时和/或第二发送定时。
在本实施例中，所述TA通过接收所述第一节点下发的用于指示所述第二节点的下行发送定时调整的第一发送定时调整消息中获得。
在本实施例中，对于接收到的第一发送定时调整消息中，可以包括两种情况：同步调整信息和时间提前量TA调整信息；
在所述第一发送定时调整消息为同步调整信息时，所述同步调整信息包括以下调整量中的一种：相对于所述第一节点发送的信号在所述第二节点的下行接收定时的第一调整量ΔT a、相对于所述第二节点的第二发送定时的第二调整量ΔT b、相对于所述第二节点当前的第一发送定时的第三调整量ΔT c；
在所述第一发送定时调整消息为时间提前量TA调整信息时，所述时间提前量TA调整信息包括时间提前量TA、变化调整量ΔTA中的一种；所述变化调整量ΔTA为相对于上一次的时间提前量TA的变化量。
在本实施例中，在所述第一发送定时调整消息为同步调整信息时，其调整方式还包括以下方式：
方式一，若所述同步调整信息为第一调整量ΔT a时，所述根据所述TA调整所述第二节点的第一发送定时包括：根据所述第一调整量中指示的数值将所述下行接收定时进行提前得到所述第一发送定时，所述第一发送定时为T 1-ΔT a。
方式二，若所述同步调整信息为第二调整量ΔT b时，所述根据所述TA调整所述第二节点的第一发送定时包括：将当前的第二发送定时调整ΔT b得到所述第一发送定时，所述第一发送定时为T 1-ΔT b。
方式三，若所述同步调整信息为第三调整量ΔT c时，所述根据所述TA调整所述第二节点的第一发送定时包括：将当前的第二发送定时T 2调整ΔT c得到所述第一发送定时，所述第一发送定时为T 2-ΔT c。
在本实施例中，所述第一发送定时调整消息为时间提前量TA调整信息时，所述时间提前量TA调整信息包括时间提前量TA、变化调整量ΔTA中的一种；所述变化调整量ΔTA为相对于上一次的时间提前量TA的变化量。
基于在所述第一发送定时调整消息为时间提前量TA调整信息时，其也包括两种情况：一种是第一发送定时和第二发送定时相同，另一种是第一发送定时和第二发送定时不相同。
在所述第一发送定时等于所述第二发送定时，当所述时间提前量TA调整信息为时间提前量TA时，所述根据所述TA调整所述第二节点的第一发送定时和/或第二发送定时包括：
根据所述时间提前量TA指示的数值将所述下行接收定时T 1进行提前获得所述第一发送定时，所述第一发送定时为T 1-TA-Ta_offset，Ta_offset为预配置的TA偏移；
当所述时间提前量TA调整信息为变化调整量ΔTA时，所述根据所述TA调整所述第二节点的第一发送定时和/或第二发送定时包括：
根据所述变化调整量ΔTA以及上一次的时间提前量TA调整获得所述第一发送定时，所述第一发送定时为T 1-TA old-ΔTA–Ta_offset，Ta_offset为预配置的TA偏移。
在所述第一发送定时与所述第二发送定不相等时，当所述时间提前量TA调整信息为时间提前量TA时，所述根据所述TA调整所述第二节点的第一发送定时和/或第二发送定时包括：
根据所述时间提前量TA指示的数值将所述下行接收定时T 1进行提前获得所述第二发送定时，所述第二发送定时为T 1-TA-Ta_offset，Ta_offset为预配置的TA偏移，所述第二发送定时为T 1-TA/2；
当所述时间提前量TA调整信息为变化调整量ΔTA时，所述根据所述TA调整所述第二节点的第一发送定时和/或第二发送定时包括：
根据所述变化调整量ΔTA以及上一次的时间提前量TA调整获得所述第二发送定时，所述第二发送定时为T 1-TA old-ΔTA–Ta_offset，Ta_offset为预配置的TA偏移，所述第二发送定时为T 1-(TA old+ΔTA)/2。
在本实施例中，在第二节点或者终端确定是采用OTA/基站定时时，所述第二节点或者终端还包括：需要确定选择以哪一种同步定时方式对发送定时进行调整，具体的：
所述第一发送定时调整消息还包括指示同步定时方式，所述指示定时方式包括：采用所述同步调整信息的同步方式和采用所述时间提前量TA调整信息的同步方式；
所述根据所述TA调整所述第二节点的第一发送定时和/或第二发送定时包括：根据所述指示同步定时方式中选择的同步方式调整所述第一发送定时和/或第二发送定时。
例如通过指示同步定时方式指示了采用同步调整信息的方式进行调整发送定时，则在调整时，根据同步调整信息中的方式中选择一种进行调整，甚至还可以是通过指示同步定时方式直接指示到选择同步调整信息中哪一种进行调整。
在本实施例中，对于第二节点或者终端，在使用GNSS定时来调整发送定时的过程中，若发送GNSS定时不可靠了，则需要进行定时同步类型的变更，具体的需要请求上级节点进行同时变更，其变更步骤包括：
若确定所述GNSS定时不可靠时，则所述第二节点向所述第一节点发送将所述定时同步类型调整为空中下载OTA/基站定时的请求，所述请求包括自身的GNSS状态信息或者能力信息；
根据调整后的所述OTA/基站定时重新调整所述第一发送定时和/或第二发送定时。
在本实施例中，在通过所述同步类型指示信息中指示的定时同步类型调整第一发送定时和/或第二发送定时之后，还包括：将接收到的所述同步类型指示信息下发至下级节点或者终端，所述下级节点为所述第二节点的子节点，所述终端为所述第二节点的下级设备。
在一些实施例中，所述第二节点在下发同步类型指示信息时，可以通过以下方式下发：
一种是可以直接转发第一节点发送的同步类型指示信息；
另一种是第二节点自己重新生成同步类型指示信息并发送给下级节点或者终端，同样的，这里发送给下级节点的同步指示信息中也是以GNSS使能标志、指示定时同步类型信息、指示同步类型优先级信息中的一种方式体现。
进一步的，在第一节点一侧的处理方式是：
第一节点根据自身的决定或者网络配置确定使用的定时同步类型，所述定时同步类型包括全球导航卫星系统GNSS定时和空中下载OTA/基站定时；
将携带有所述定时同步类型的同步类型指示信息下发至第二节点或者终端，所述同步类型指示信息用于调整所述第二节点的第一发送定时和/或第二发送定时，其中所述第一节点为所述第二节点的父节点；所述定时同步类型以以下方式中的一种存在于所述同步类型指示信息中：GNSS使能标志、指示定时同步类型信息、指示同步类型优先级信息。
本公开实施例提供了一种发送定时的确定设备，其可应用于各种基站或者终端，尤其是具有接入和回传一体化IAB的基站，对此，该设备主要是应用于IAB节点一端控制用于控制发送定时的装置，参见图5所示，该设备可以包括：发送模块51，用于将下发第一定时调整信息给第二节点，所述第一定时调整信息用于调整所述第二节点的第一发送定时，和/或，第一节点下发同步类型指示信息给第二节点，所述同步类型指示信息包括以下至少之一：全球导航卫星系统GNSS定时，空中接口OTA/基站定时；所述同步类型指示信息用于确定第一发送定时的调整方式，其中所述第一节点为所述第二节点的父节点，所述第一发送定时为所述第二节点的下行发送定时，具体的，对于所述定时同步类型是第一节点根据自身的决定或者网络配置确定，对于该设备中的各个模块所实现的步骤和具体过程，可参照上述各实施例所示的上行、下行发送定时的调整过程，在此不再赘述。
在本实施例中，所述第二节点还可以根据定时同步类型调整其第二发送定时，该第二发送定时为第二节点的上行数据发送时刻。
在本实施例中，对于IAB节点一端接收到的上级节点donor下发的同步类型指示信息时，需要根据同步类型指示信息调整自身的上行、下行发送定时，对此，本公开中，还提供了另一种发送定时的确定设备的结构，该设备是基于子节点来构建的装置，参见图6所示，该设备包括：接收模块61，配置为接收第一节点发送的第一定时调整信息，根据所述第一定时调整信息调整所述第二节点的第一发送定时，或者第二节点使用GNSS定时作为第一发送定时，所述第一发送定时为所述第二节点的下行发送定时。对于该装置中的模块所实现的步骤和具体过程，可参照上述各实施例所示的上行、下行发送定时的确定过程，在此不再赘述。
在本实施例中，在所述第二节点接收第一节点发送的第一定时调整信息或者在所述第二节点使用GNSS定时作为所述第二节点的第一发送定时之前，还包括：
第二节点接收第一节点发送的同步类型指示信息，确定使用 GNSS定时的定时同步类型和/或确定使用OTA/基站定时的定时同步类型；
根据所述定时同步类型确定对应的所述第一发送定时的调整方式；
所述调整所述第二节点的第一发送定时包括：
根据所述调整方式接收到的所述第一定时调整信息调整所述第二节点的第一发送定时，或者将使用的GNSS定时作为所述第二节点的第一发送定时。
在本实施例中，第二节点还可以通过接收到同步类型指示信息来获取定时同步类型。
进一步的，在获取到定时同步类型后，其还需要确定所述第二节点本身是否支持GNSS定时；
若支持，则将所述GNSS定时作为所述第二节点对其下行发送定时的定时同步类型；
若不支持，则向所述第一节点发送将所述定时同步类型调整为OTA/基站定时的请求，所述请求包括自身的GNSS状态信息或者能力信息。
在以OTA/基站定时时，还需要根据对应的调整量选择不同的调整方式，具体如下模式所示：
模式一，第一定时调整(提前)消息指示了节点下行发送的同步调整信息，具体的，
指示了调整量ΔT a，为相对于父节点发送的信号在所述节点的定时(下行接收定时)的调整量；
或者，指示了调整量ΔT b，为相对于所述节点的第二发送定时的调整量；
或者，指示了调整量ΔT c，为相对于所述节点当前的第一发送定时的调整量，也可以说为相对于当前第一定时的调整量的调整量；
模式二，第一定时调整(提前)消息为TA调整(提前)信息，具体的：
TA调整(提前)信息指示了调整量TA，或者指示了调整量ΔTA， 则确定第一定时调整量TA＝TA old+ΔTA，TA old为收到调整消息之前使用的调整量，则第一定时为T 1-TA-TAoffset，T 1为父节点发送的信号在所述节点的定时(下行接收定时)，上述ΔT 1为TA+TA_offset，这里的TA_offset为预配置的TA偏移；
模式三，第一定时调整(提前)消息为TA调整(提前)信息，具体的：
TA调整(提前)信息指示了调整量TA，或者[指示了调整量ΔTA，则确定第一定时调整量TA＝TA old+ΔTA，TA old为收到调整消息之前使用的调整量]，则第一定时为T 1-TA/2，T 1为父节点发送的信号在所述节点的定时(下行接收定时)，上述ΔT 1为TA/2。
进一步的，本实施例还提供了另一种与第二节点或者第一节点配合的终端，参见图7，该终端包括：第二接收模块71，配置为接收第一节点或第二节点下发的同步类型指示信息；所述同步类型指示信息用于确定所述第一节点或第二节点当前使用的定时同步类型，所述定时同步类型包括全球导航卫星系统GNSS定时和空中接口OTA/基站定时；第二同步定时模块72，配置为通过所述同步类型指示信息中指示的定时同步类型调整自身的第二发送定时。对于该终端中的各模块所实现的步骤和具体过程，可参照上述各实施例所示的上行、下行发送定时的确定过程，在此不再赘述。
本实施例提供的装置中，通过接收第一节点下发的同步类型指示信息，根据同步类型指示信息中指示的定时同步类型调整第二节点自身的第一发送定时和/或第二发送定时，以及控制第二节点下的子节点或者终端的上行发送定时，从而实现了多端之间的发送定时的同步定时调整，也使得了在5G NR中，可以保证了节点在实现同收或者同发时，节点间的发送定时的调整机制不会存在相互影响；同时也提高了IAB网络的数据传输效率和分配资源的利用率，进一步的还可以更好的满足节点或者UE的需求，提升用户体验。本方案易于实现，并且适用于各种不同场景。
本公开实施例提供了一种通信设备，参见图8所示，该设备包 括处理器211、存储器212、通信单元213和通信总线214；
通信总线214用于实现处理器2111、通信单元213和存储器212之间的通信连接；
一种实例中，所述处理器211用于执行存储器中存储的一个或者多个第一程序，以实现如上各个实施例中的发送定时的确定方法的步骤；
在另一实例中，所述处理器211用于执行存储器中存储的一个或者多个第二程序，以实现如上各个实施例中的发送定时的确定方法的步骤。
在另一实例中，所述处理器211用于执行存储器中存储的一个或者多个第三程序，以实现如上各个实施例中的发送定时的确定方法的步骤。
本实施例还提供了一种计算机可读存储介质，该计算机可读存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、计算机程序模块或其他数据)的任何方法或技术中实施的易失性或非易失性、可移除或不可移除的介质。计算机可读存储介质包括但不限于RAM(Random Access Memory，随机存取存储器)，ROM(Read-Only Memory，只读存储器)，EEPROM(Electrically Erasable Programmable read only memory，带电可擦可编程只读存储器)、闪存或其他存储器技术、CD-ROM(Compact Disc Read-Only Memory，光盘只读存储器)，数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。
在一种示例中，本实施例中的计算机可读存储介质可用于存储一个或者多个第一计算机程序，该一个或者多个第一计算机程序可被一个或者多个处理器执行，以实现如上各实施例中的发送定时的确定方法的步骤。
在另一种示例中，本实施例中的计算机可读存储介质可用于存储一个或者多个第二计算机程序，该一个或者多个第二计算机程序可被一个或者多个处理器执行，以实现如上各实施例中的发送定时的确 定方法的步骤。
在另一种示例中，本实施例中的计算机可读存储介质可用于存储一个或者多个第三计算机程序，该一个或者多个第三计算机程序可被一个或者多个处理器执行，以实现如上各实施例中的发送定时的确定方法的步骤。
本实施例还提供了一种第一计算机程序(或称计算机软件)，该第一计算机程序可以分布在计算机可读介质上，由可计算装置来执行，以实现如上各实施例所示的发送定时的确定方法的至少一个步骤；并且在某些情况下，可以采用不同于上述实施例所描述的顺序执行所示出或描述的至少一个步骤。
本实施例还提供了一种第二计算机程序(或称计算机软件)，该第二计算机程序可以分布在计算机可读介质上，由可计算装置来执行，以实现如上各实施例所示的发送定时的确定方法的至少一个步骤；并且在某些情况下，可以采用不同于上述实施例所描述的顺序执行所示出或描述的至少一个步骤。
本实施例还提供了一种计算机程序产品，包括计算机可读装置，该计算机可读装置上存储有如上所示的第一计算机程序或第二计算机程序或第三计算机程序。本实施例中该计算机可读装置可包括如上所示的计算机可读存储介质。
可见，本领域的技术人员应该明白，上文中所公开方法中的全部或某些步骤、系统、装置中的功能模块/单元可以被实施为软件(可以用计算装置可执行的计算机程序代码来实现)、固件、硬件及其适当的组合。在硬件实施方式中，在以上描述中提及的功能模块/单元之间的划分不一定对应于物理组件的划分；例如，一个物理组件可以具有多个功能，或者一个功能或步骤可以由若干物理组件合作执行。某些物理组件或所有物理组件可以被实施为由处理器，如中央处理器、数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。
此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、计算机程序模块或者诸如载波或其他传输机 制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。所以，本公开不限制于任何特定的硬件和软件结合。
以上内容是结合示例性的实施方式对本公开实施例所作的进一步详细说明，不能认定本公开的具体实施只局限于这些说明。对于本公开所属技术领域的普通技术人员来说，在不脱离本公开构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本公开的保护范围。

Claims (21)

  1. 一种发送定时的确定方法，包括：
    第一节点下发第一定时调整信息给第二节点，所述第一定时调整信息用于调整所述第二节点的第一发送定时；或者，指示第二节点使用全球导航卫星系统(GNSS)定时作为所述第二节点的第一发送定时，所述第一发送定时为所述第二节点的下行发送定时。
  2. 如权利要求1所述的发送定时的确定方法，还包括：第一节点下发同步类型指示信息给第二节点；
    所述同步类型指示信息包括以下至少之一：GNSS定时，空中接口(OTA)/基站定时；所述同步类型指示信息用于确定第一发送定时的调整方式，其中所述第一节点为所述第二节点的父节点，所述调整方式为GNSS定时或OTA/基站定时。
  3. 如权利要求2所述的发送定时的确定方法，其中，所述同步类型指示信息包括以下信息中的至少一种：GNSS使能标志、指示定时同步类型信息、指示同步类型优先级信息。
  4. 如权利要求3所述的发送定时的确定方法，其中，若所述第一节点下发的同步类型指示信息包括OTA/基站定时时，所述方法还包括：下发OTA/基站定时的模式指示信息给所述第二节点，所述OTA/基站定时的模式指示信息携带在所述第一定时调整信息或所述同步类型指示信息中。
  5. 一种发送定时的确定方法，包括：
    第二节点接收第一节点发送的第一定时调整信息，根据所述第一定时调整信息调整所述第二节点的第一发送定时；或者，
    第二节点使用全球导航卫星系统(GNSS)定时作为所述第二节点的第一发送定时，所述第一发送定时为所述第二节点的下行发送定 时。
  6. 如权利要求5所述的发送定时的确定方法，其中，在所述第二节点接收第一节点发送的第一定时调整信息或者在所述第二节点使用GNSS定时作为所述第二节点的第一发送定时之前，所述方法还包括：
    第二节点接收第一节点发送的同步类型指示信息，确定使用GNSS定时的定时同步类型和/或确定使用空中接口(OTA)/基站定时的定时同步类型；
    根据所述定时同步类型确定对应的所述第一发送定时的调整方式，所述调整方式为GNSS定时或OTA/基站定时。
  7. 如权利要求6所述的发送定时的确定方法，其中，所述同步类型指示信息包括以下信息中的至少一种：GNSS使能标志、指示定时同步类型信息、指示同步类型优先级信息。
  8. 如权利要求7所述的发送定时的确定方法，其中，所述根据所述定时同步类型确定对应的所述第一发送定时的调整方式包括：
    若所述同步类型指示信息中指示的是GNSS定时的定时同步类型，且确定所述第二节点本身支持GNSS定时，则确定使用所述GNSS定时的定时同步类型，将所述GNSS定时作为所述第二节点的第一发送定时；
    否则，确定使用所述OTA/基站定时的定时同步类型；接收第一节点发送的第一定时调整信息，根据所述第一定时调整信息调整所述第二节点的第一发送定时。
  9. 如权利要求8所述的发送定时的确定方法，还包括：向所述第一节点发送第二节点自身的GNSS状态信息或者能力信息。
  10. 如权利要求8所述的发送定时的确定方法，其中，在将所 述GNSS定时设置作为所述第二节点的第一发送定时之后，所述方法还包括：
    若确定所述GNSS定时不可靠/不可用时，则所述第二节点向所述第一节点发送将所述定时同步类型调整为OTA/基站定时的请求，所述请求包括自身的GNSS状态信息或者能力信息。
  11. 如权利要求8所述的发送定时的确定方法，其中，若所述同步类型指示信息中指示的是GNSS定时的定时同步类型，在确定使用所述OTA/基站定时的定时同步类型之后，所述方法还包括：
    所述第二节点确定所述GNSS定时可靠/可用时，则所述第二节点向所述第一节点发送将所述定时同步类型调整为GNSS定时的请求，所述请求包括自身的GNSS状态信息或者能力信息。
  12. 如权利要求5所述的发送定时的确定方法，其中，所述第一定时调整信息包括同步调整信息，所述同步调整信息包括以下调整量中的一种：相对于所述第一节点发送的信号在所述第二节点的下行接收定时的第一调整量ΔT a、相对于所述第二节点的第二发送定时的第二调整量ΔT b、相对于所述第二节点当前的第一发送定时的第三调整量ΔT c。
  13. 如权利要求12所述的发送定时的确定方法，还包括：获取所述第一节点发送的OTA/基站定时的模式指示信息，所述模式指示信息指示的OTA/基站定时的模式包括以下至少之一：
    所述第一定时调整信息为同步调整信息的模式一；
    所述第一定时调整信息为时间调整信息的模式二；
    所述第一定时调整信息为时间调整信息的模式三。
  14. 如权利要求13所述的发送定时的确定方法，其中，
    若所述模式指示信息指示为模式一，所述调整所述第二节点的第一发送定时为按照所述模式一对所述第一发送定时进行调整，所述 模式一的调整包括以下一种：
    若所述同步调整信息为第一调整量ΔT a时，将所述第二节点的下行接收定时T 1进行提前ΔT a得到所述第一发送定时，所述第一发送定时为T 1-ΔT a；
    若所述同步调整信息为第二调整量ΔT b时，将当前的第二发送定时T 2调整ΔT b得到所述第一发送定时，所述第一发送定时为T 2-ΔT b；所述第二发送定时为所述第二节点向所述第一节点进行发送的发送定时；
    若所述同步调整信息为第三调整量ΔT c时，将当前的第一发送定时T old调整ΔT c得到新的所述第一发送定时，所述第一发送定时为T old-ΔT c。
  15. 如权利要求13所述的发送定时的确定方法，其中，若所述调整模式指示信息指示为模式二时，所述时间调整信息包括时间提前量TA、变化调整量ΔTA中的一种；所述变化调整量ΔTA为相对于上一次的时间提前量TA的变化量；所述调整所述第二节点的第一发送定时为按照所述模式二对所述第一发送定时进行调整，所述模式二的调整包括以下一种：
    所述时间调整信息为时间提前量TA时，根据所述时间提前量TA将所述下行接收定时T 1进行提前获得所述第一发送定时，所述第一发送定时为T 1-TA-Ta_offset，Ta_offset为预配置的TA偏移；
    所述时间调整信息为变化调整量ΔTA时，根据所述变化调整量ΔTA以及上一次的时间提前量TA old调整获得所述第一发送定时，所述第一发送定时为T 1-TA old-ΔTA–Ta_offset，Ta_offset为预配置的TA偏移。
  16. 如权利要求13所述的发送定时的确定方法，其中，若所述调整模式指示信息指示为模式三时，所述时间调整信息包括时间提前量TA、变化调整量ΔTA中的一种；所述变化调整量ΔTA为相对于上一次的时间提前量TA的变化量，所述调整所述第二节点的第一发送 定时为按照所述模式三对所述第一发送定时进行调整，所述模式三的调整包括以下一种：
    所述时间调整信息为时间提前量TA时，根据所述时间提前量TA将所述下行接收定时T 1进行提前获得所述第一发送定时，所述第一发送定时为T 1-TA/2；
    所述时间调整信息为变化调整量ΔTA时，根据所述变化调整量ΔTA以及上一次的时间提前量TA old调整获得所述第一发送定时，所述第一发送定时为T 1-(TA old+ΔTA)/2。
  17. 如权利要求6至16中任一项所述的发送定时的确定方法，还包括：将接收到的所述同步类型指示信息下发至下级节点或者终端，所述下级节点为所述第二节点的子节点，所述终端为所述第二节点的下级设备。
  18. 一种发送定时的确定设备，包括：
    发送模块，配置为通过第一节点下发第一定时调整信息给第二节点，所述第一定时调整信息用于调整所述第二节点的第一发送定时，和/或，通过第一节点下发同步类型指示信息给第二节点，所述同步类型指示信息包括以下至少之一：全球导航卫星系统(GNSS)定时，空中接口(OTA)/基站定时；所述同步类型指示信息用于确定第一发送定时的调整方式，其中所述第一节点为所述第二节点的父节点，所述第一发送定时为所述第二节点的下行发送定时。
  19. 一种发送定时的确定设备，包括：
    接收模块，配置为接收第一节点发送的第一定时调整信息，根据所述第一定时调整信息调整第二节点的第一发送定时；或者使用GNSS定时作为所述第一发送定时，所述第一发送定时为所述第二节点的下行发送定时。
  20. 一种通信设备，包括处理器、存储器、通信单元和通信总 线；
    所述通信总线配置为实现所述处理器、所述通信单元和所述存储器之间的无线通信连接；
    所述处理器配置为执行存储器中存储的一个或者多个第一程序，以实现如权利要求1至4中任一项所述的发送定时的确定方法的步骤；
    所述处理器配置为执行存储器中存储的一个或者多个第二程序，以实现如权利要求5至17中任一项所述的发送定时的确定方法的步骤。
  21. 一种计算机可读存储介质，所述计算机可读存储介质存储有一个或者多个第一计算机程序和一个或多个第二计算机程序，所述一个或者多个第一计算机程序可被一个或者多个处理器执行，以实现如权利要求1至4任一项所述的发送定时的确定方法的步骤；
    所述一个或者多个第二计算机程序可被一个或者多个处理器执行，以实现如权利要求5至17中任一项所述的发送定时的确定方法的步骤。
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