WO2020029868A1 - 电子装置、无线通信方法和计算机可读介质 - Google Patents

电子装置、无线通信方法和计算机可读介质 Download PDF

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Publication number
WO2020029868A1
WO2020029868A1 PCT/CN2019/098956 CN2019098956W WO2020029868A1 WO 2020029868 A1 WO2020029868 A1 WO 2020029868A1 CN 2019098956 W CN2019098956 W CN 2019098956W WO 2020029868 A1 WO2020029868 A1 WO 2020029868A1
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Prior art keywords
node
ssb
electronic device
relay
nodes
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PCT/CN2019/098956
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English (en)
French (fr)
Inventor
许晓东
孙梦颖
陈冠宇
原英婷
张文博
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索尼公司
许晓东
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Priority to US17/256,655 priority Critical patent/US11683137B2/en
Priority to CN201980047068.6A priority patent/CN112425255B/zh
Publication of WO2020029868A1 publication Critical patent/WO2020029868A1/zh
Priority to US18/143,119 priority patent/US11973711B2/en

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    • 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
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • 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
    • H04W56/004—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
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components

Definitions

  • the present disclosure relates generally to the field of wireless communications, and more particularly, to electronic devices, wireless communication methods, and computer-readable media related to integrated access backhaul links (IABs).
  • IABs integrated access backhaul links
  • IAB node A establishes a connection with the core network through a cable. This node is called an IAB donor node.
  • IAB nodes B and C establish a connection with the IAB donor through wireless backhual (BH), and then establish a connection with the core network. Nodes B and C are called IAB nodes.
  • BH wireless backhual
  • IAB nodes accessing the network need to be periodically discovered to detect surrounding candidate IAB nodes, as shown in FIG. 17 and FIG. 18. This discovery process helps to find suitable candidates to establish multiple BH connections or backup connections to provide the required robustness.
  • an electronic device for wireless communication includes a processing circuit.
  • the processing circuit is configured to control to send or receive configuration information related to the configuration of the reference signal used for the discovery process of the integrated access backhaul link node.
  • a wireless communication method includes: sending or receiving configuration information related to a configuration of a reference signal for a discovery process of an integrated access backhaul link node.
  • an electronic device for wireless communication includes a processing circuit.
  • the processing circuit is configured to obtain hop count information, which indicates the hop count of the relay node from the donor node.
  • the donor node is a comprehensive access backhaul link node that is wired to the core network, and the relay node is a node that is not wired to the core network.
  • a wireless communication method includes: acquiring hop count information, the hop count information indicating a relay hop distance from a donor node to a donor node.
  • the donor node is an integrated access backhaul link node that is wired to the core network
  • the relay node is a node that is not wired to the core network.
  • an electronic device for wireless communication includes a processing circuit.
  • the processing circuit is configured to determine an adjustment to a synchronization time of at least one of the different nodes based on a time deviation between signals of different nodes connected via a backhaul link.
  • a wireless communication method includes determining an adjustment to a synchronization time of at least one of the different nodes based on a time deviation between signals of different nodes connected via a backhaul link.
  • Embodiments of the present invention also include a computer-readable medium including executable instructions, which when executed by an information processing device, cause the information processing device to execute the method according to the above-mentioned embodiments.
  • Embodiments of the present invention can effectively implement discovery between IAB nodes.
  • FIG. 1 is a block diagram showing a configuration example of an electronic device for wireless communication according to an embodiment of the present invention
  • FIG. 2 is a block diagram showing a configuration example of an electronic device for wireless communication according to another embodiment
  • FIG. 3 is a block diagram showing a configuration example of an electronic device for wireless communication according to still another embodiment
  • FIG. 4 is a block diagram showing a configuration example of an electronic device for wireless communication according to still another embodiment
  • FIG. 5 is a block diagram showing a configuration example of an electronic device for wireless communication according to still another embodiment
  • FIG. 6 is a flowchart illustrating a process example of a wireless communication method according to an embodiment of the present invention
  • FIG. 7 is a block diagram showing a configuration example of an electronic device for wireless communication according to an embodiment of the present invention.
  • FIG. 8 is a block diagram showing a configuration example of an electronic device for wireless communication according to another embodiment
  • FIG. 9 is a flowchart illustrating a process example of a wireless communication method according to an embodiment of the present invention.
  • FIG. 10 is a block diagram showing a configuration example of an electronic device for wireless communication according to an embodiment of the present invention.
  • FIG. 11 is a block diagram showing a configuration example of an electronic device for wireless communication according to another embodiment
  • FIG. 12 is a flowchart illustrating a process example of a wireless communication method according to an embodiment of the present invention.
  • FIG. 13 is a block diagram showing an exemplary structure of a computer that implements the method and apparatus of the present disclosure
  • FIG. 14 is a block diagram showing an example of a schematic configuration of a smartphone to which the technology of the present disclosure can be applied;
  • 15 is a block diagram showing an example of a schematic configuration of a gNB (base station in a 5G system) to which the technology of the present disclosure can be applied;
  • 16 is a schematic diagram for explaining an IAB network scenario
  • 17 and 18 are schematic diagrams for explaining an IAB node discovery scenario
  • 19A, 19B, and 19C show examples of the configuration of a synchronization signal block (SSB);
  • FIG. 20 shows an example process of user equipment (UE) access performance evaluation
  • Figure 21 shows an example of an IAB scenario
  • FIG. 22 shows an example procedure of the configuration of a channel state information reference signal (CSI-RS).
  • CSI-RS channel state information reference signal
  • Figure 23 shows an example of an IAB scenario
  • FIG. 24 shows an example process of the configuration of the CSI-RS
  • Figure 25 shows an example of an IAB scenario
  • FIG. 26 shows an example process of the configuration of the CSI-RS
  • Figure 27 shows an example of an IAB scenario
  • FIG. 28 shows an example process of the configuration of the CSI-RS
  • Figure 29 shows an example of an IAB scenario
  • FIG. 30 shows an example process of the configuration of the CSI-RS
  • FIG. 31 is a schematic diagram for explaining a situation in which SSB transmission and reception conflicts between IAB nodes
  • 32 is a schematic diagram for explaining a situation of interference between SSBs of an IAB node
  • Figure 33 shows an example of IAB network deployment
  • Figure 40 shows an example of adjustment of the SSB for a backhaul link
  • Figure 41 shows an example of an IAB scenario
  • FIG. 42 shows an example process of the configuration of the SSB
  • Figure 43 shows an example of an IAB scenario
  • FIG. 44 shows an example process of the configuration of the SSB
  • Figure 45 shows an example of an IAB scenario
  • FIG. 46 shows an example process of the configuration of the SSB
  • Figure 47 shows an example of an IAB scenario
  • FIG. 48 shows an example process of the configuration of SSB mute
  • FIG. 49 shows another example process of the configuration of SSB mute
  • FIG. 50 shows still another example process of the configuration of SSB mute
  • 51A and 51B are schematic diagrams for explaining interference between IAB nodes
  • Figures 52 to 54 show example procedures for coordination between IAB nodes
  • 55 is a schematic diagram for explaining a scenario of IAB link reselection
  • FIG. 56 shows an example of the correspondence between the number of hops and the reference signal resources
  • 57 and 58 show an example of a process of link reselection
  • 59 and 60 show examples of a process of link reselection based on a plurality of candidate links
  • 61 and 62 show examples of a process of link reselection assisted by a donor node
  • FIG. 63 and FIG. 64 are schematic diagrams for explaining a scenario in which the nodes are synchronously measured
  • FIG. 65 is a diagram for explaining a configuration example of a timing maintenance signal.
  • FIG. 66 shows an example process of node synchronization using a timing maintenance signal.
  • the electronic device 100 for wireless communication includes a processing circuit 110.
  • the processing circuit 110 may be implemented as, for example, a specific chip, a chipset, or a central processing unit (CPU).
  • the processing circuit 110 includes a control unit 111. It should be noted that although the figure shows, for example, the control unit 111 in the form of functional blocks, it should be understood that the functions of each unit can also be implemented by the processing circuit as a whole, not necessarily by discrete processing circuits. The actual components to achieve. In addition, although the processing circuit is shown in a block in the figure, the electronic device may include multiple processing circuits, and the functions of each unit may be distributed into the multiple processing circuits so that the multiple processing circuits operate in cooperation to perform these functions. .
  • the control unit 111 is configured to perform control to transmit or receive configuration information related to the configuration of a reference signal for a discovery process of an integrated access backhaul link (IAB) node.
  • IAB integrated access backhaul link
  • the electronic device is used for discovery of an IAB node.
  • IAB In order to deploy cells more flexibly and densely, IAB was introduced to enable wireless connections between base stations.
  • the rest of the deployed access points small base stations or relay equipment (can be IAB relay nodes or IAB nodes in this article) ) It is connected to the IAB donor node by single-hop and multi-hop by wireless link.
  • IAB nodes connected to the network need to periodically discover surrounding candidate backhaul links (BH).
  • BH candidate backhaul links
  • a node closer to the donor node among two adjacent nodes on the link may be called an upper node or a parent node, and a node further away from the donor node may be called a lower node or Child node.
  • the electronic device can be implemented on the IAB donor node or IAB relay node side.
  • the electronic device may send configuration information to a lower node, for example.
  • the electronic device may receive configuration information from the donor node, or may send the configuration information to a lower node.
  • the electronic device can also be implemented on the UE side, and can be received from the access point, for example Configuration information.
  • a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS) may be used as a reference signal for a discovery process of an IAB node.
  • SSB synchronization signal block
  • CSI-RS channel state information reference signal
  • the configuration information includes a multiplexing manner of the SSB used for the access link and the SSB used for the backhaul link.
  • the SSB signal used by the UE for cell access is configured in units of one field.
  • the base station broadcasts periodically, and configures the measurement cycle and measurement duration for the UE through the system information blocks SIB2 and SIB4, and can also be configured through special signaling.
  • the SSB (AC, SSB) used for the access link and the SSB (BH, SSB) used for the return link are orthogonal in time.
  • part of the SSB resource locations within the period of the SSB for the access link may be allocated to the SSB for the backhaul link.
  • a part of SSB resource locations may be allocated to the BHSSB.
  • the period of the SSB for the access link may be increased, and the SSB for the backhaul link may be arranged in the increased period portion.
  • a period of one half frame (5 ms) is extended to a period of two half frames (10 ms), and the SSB resource location in the added one half frame is allocated to the BHSSB. It is pointed out in the need that instead of all the SSB resource locations in the increased period portion being allocated to the BHSSB, some SSB resource locations may be allocated to the ACSSB.
  • the present invention is not limited to the specific configuration in the above examples, such as the number and location of ACSSB and BHSSB.
  • a UE access quality supervision mechanism can be introduced. After the ACSSB and BHSSB are configured, the UE's access performance and synchronization performance can be periodically detected, and the Adjust accordingly.
  • the multiplexing mode of ACSSB and BHSSB can be adjusted based on the access performance of the user equipment. For example, in the case where the access performance is degraded, the SSB used for the access link may be increased.
  • the adjustment may be triggered when the access delay of the user equipment exceeds a predetermined threshold.
  • an access delay threshold may be introduced.
  • the UE access delay is greater than the threshold due to a decrease in ACSSB
  • the UE may apply for an ACSSB to the IAB node.
  • the threshold may be pre-configured or may be obtained from an SSB signal.
  • the IAB node can adjust the ACSSB position. As shown in Figure 20.
  • the adjustment of UE access monitoring SSB resources can follow the existing SSB monitoring configuration, including duration (number of sub-frames to be monitored) and monitoring period (5ms, 10ms, 20ms, 40ms, 80ms ).
  • the adjustment process of the ACSSB may include, for example, configuring an extra ACSSB position for the UE through a special signaling or reducing the period of the UESSB monitoring.
  • the BHSSB position in the half frame may be reduced or the BHSSB period may be increased for ACSSB.
  • the power level can be used to distinguish ACSSB and BHSSB. For example, when the received SSB is within a certain range, it is considered ACSSB. Alternatively, some SSB locations may be reserved for the AC (SSB) dedicated to the UE (not connected to the network).
  • different power levels may be applied to the SSB used for the access link and the SSB used for the backhaul link, respectively, or a specific SSB resource location may be set to be used for the access link.
  • SSB SSB
  • CSI-RS can also be used as a reference signal for the discovery process of IAB nodes.
  • CSI-RS transmissions can be individually configured for some connections without directly affecting other connections or measurements.
  • CSI-RS transmissions can be configured for narrower beams than SSB beams, so the possibility of beam evaluation can be provided for candidate BH links, which is beneficial for quickly switching connections to candidate links.
  • the reference signal used for the discovery process of the IAB node may include CSI-RS
  • the configuration information about the reference signal may include CSI-RS (AC-CSI-RS) for the access link and backhaul chain CSI-RS (BH CSI-RS) multiplexing mode.
  • the CSI-RS for the backhaul link may be transmitted in a directional beam, and the CSI-RS for the access link and the CSI-RS for the backhaul link multiplex time-frequency resources.
  • the donor node may configure the parameter information of the directional beam for the relay node based on the physical location information of the relay node and the connection relationship between the relay nodes. For example, the donor node can obtain the physical location information or connection status of the relay node from the core network. In addition, the physical location information of the relay nodes and the connection relationship between the relay nodes may also be reported to the donor node by the relay nodes.
  • the donor node may configure the BH SCI-RS directional beam parameter information for the relay node.
  • the parameters may include, for example, the transmission direction of the directional beam, time-frequency resources, and time-frequency resources of the directional beam being monitored.
  • FIG. 22 shows a signaling flow for configuration in the example scenario shown in FIG. 21.
  • hop1 represents a relay node with a hop number of 1 that is a child node of the donor node
  • hop2 represents a relay node with a hop number of 2 that is a child node of the hop1 node
  • hop3 represents a relay node that has a hop number of 3.
  • the donor node sends the CSI-RS transmission and reception configuration of the hop1 node, the hop2 node, and the hop3 node to the hop1 node.
  • the hop1 node sends the CSI-RS transmission and reception configuration of the hop2 node and the hop3 node to the hop2 node, hop2.
  • the node sends the CSI-RS transmission and reception configuration of the hop3 node to the hop3 node.
  • the new fields in the CSI-RS transmission and reception configuration provided by the donor node may include the configuration of all child nodes, and each child node obtains its configuration.
  • BH CSI-RS resource type (child node) ⁇ Non-periodic, semi-static, periodic ⁇ BH CSI-RS-ResourceSetList (child node) Bit string, resources used to send CSI-RS BH CSI-measConfig (child node) Unit, IAB node monitors CSI-RS resources
  • the donor node may configure parameter information of the directional beam for the relay node and the candidate node based on the direction information about the candidate nodes around the relay node detected and reported by the relay node.
  • Figure 23 shows an example scenario, where hop1 and IAB node 1 represent a relay node with a hop count of 1, hop1 and IAB node 2 represent another relay node with a hop count of 1, and hop2 and IAB node represent a hop with a hop count of 2.
  • the relay node is a child of hop1 and IAB node1.
  • the IAB node monitors the surrounding candidate IAB nodes according to the SSB signal and reports it to the donor node, as shown in FIG. 24.
  • the donor node indicates to the IAB node 1 the resources for CSI-RS reception and transmission, and indicates to the IAB node 2 the resources for CSI-RS reception and transmission.
  • the configured time-frequency resources may be periodic, aperiodic, or semi-statically scheduled.
  • the fields that can be added to the CSI-RS reception configuration are shown in Table 1-3 below.
  • the donor node can also instruct the corresponding relay node to transmit time-frequency resources and transmission direction information of the CSI-RS.
  • the relay node may set the parameter information of the directional beam based on the direction information detected by the candidate node around it, and report the set parameter information to the donor node.
  • an IAB node can monitor surrounding candidate IAB nodes based on the SSB signal, configure the direction of the CSI-RS according to the direction of the SSB signal, and configure the transmission direction of the CSI-RS directional beam by itself based on the remaining CSI-RS time resources Frequency resources, and report the time-frequency resources of the CSI-RS directional beam to the donor node.
  • the donor node can review and adjust, and configure the CSI-RS reception time-frequency resource location. IAB nodes can then transmit CSI-RS on the configured resources.
  • An example scenario and process is shown in Figure 25 and Figure 26.
  • the new fields in the CSI-RS configuration report are shown in Table 1-4 below.
  • the foregoing describes an example manner of transmitting a CSI-RS in a directional beam.
  • the CSI-RS for the backhaul link may be transmitted in an omnidirectional manner, and the CSI-RS for the access link and the CSI-RS for the backhaul link are orthogonal. Time-frequency resources.
  • a portion of the CSI-RS resources can be fixed exclusively for AC CSI-RS, and the remaining CSI-RS resources can be allocated according to the UE link quality.
  • the available AC CSI-RS receiving groups can be broadcasted through broadcast information, or through dedicated Higher layer signaling indicates the UE AC-CSI-RS receiving group.
  • the assigned BH CSI-RS receiving group can be configured for its child nodes through broadcast information, and can also be instructed to the IAB node by special high-level signaling.
  • Two CSI-RS configuration modes can be adopted, namely a centralized configuration mode and a distributed configuration mode.
  • the donor node configures time-frequency resources of the CSI-RS for the relay node based on the physical location information of the relay node and the connection relationship between the relay nodes.
  • the donor node may configure the CSI-RS reception and transmission time resource for the relay node according to the geographic location information and the connection relationship of each relay node.
  • An example scenario and process is shown in Figure 27 and Figure 28.
  • the donor node first configures the CSI-RS and RX resources for the hop1 IAB node, and then allocates the remaining BH CSI-RS time resources to the hop1 IAB node configuration.
  • the configuration can include BH CSI-RS transmission and BH CSI-RS reception (listen to the same-hop IAB node) ), And then configure an independent hop1 IAB node CSI-RS transmission time resource (can reuse any hop1 IAB node CSI-RS resource). Then, configure the CSI-RS receiving time resource for the hop2 IAB node according to hop1 connected to the hop2 IAB node, and then configure the CSI-RS sending resources for the hop2 IAB nodes connected to each other to ensure that the time resources are orthogonal and configure CSI-RS Receive, and then configure CSI-RS transmission for the independent hop2 IAB node. And so on until all the relay nodes are configured.
  • the fields added in the CSI-RS transmission and reception configuration can be shown in Table 1-5 below.
  • the relay node can configure time-frequency resources for its subordinate nodes and report the configured time-frequency resources to the donor node.
  • the parent node may configure CSI-RS reception time resources (listening to the parent node and other IAB nodes) and CSI-RS transmission time resources for its children. Then, the child node configures its child nodes with CSI-RS transmission and reception resources, ensures that its child nodes' CSI-RS time resources are orthogonal, and reports to its parent node. It is assumed that all the parent nodes save the CSI-RS configuration information of all its child nodes, and adjust when the parent node detects a CSI-RS detection conflict. An example scenario and process are shown in Figures 29 and 30.
  • the fields added in the CSI-RS transmission and reception configuration can be shown in Table 1-6 below.
  • BH CSI-RS-ResourceSetList Bit string resources used to send CSI-RS BH CSI-measConfig Bit string, IAB node monitors CSI-RS resources
  • a BH / SSB / CSI-RS resource configuration mode can be provided while ensuring access performance of the UE.
  • IAB nodes cannot transmit and receive SSB signals at the same time in one time slot.
  • RN1 and RN2 if two adjacent IAB nodes (RN1 and RN2) transmit and receive SSBs at the same time, RN1 and RN2 cannot monitor each other's SSB signals.
  • RN3 if RN1 and RN2 transmit SSB signals at the same time, RN3 cannot accurately distinguish whether the SSB signals are from RN1 or RN2.
  • the time resources sent by the ISB nodes and neighboring nodes' SSBs should be orthogonal.
  • the IAB nodes are configured with SSB receiving groups, which can periodically Listening to as many surrounding candidate nodes as possible.
  • the configuration information related to the reference signal may include a multiplexing manner for SSB transmission and / or reception.
  • the multiplexing method may include orthogonality of time resources for transmission of SSBs of adjacent contacts.
  • the above multiplexing method can be determined in the following ways: the donor node configures the time resource for the SSB transmission for the relay node based on the physical location information of the relay node and the connection relationship between the relay nodes; the relay node is its subordinate node Configure the time resource and report the configured time resource to the donor node; or the relay node detects the SSB sent by the surrounding nodes based on the number of hops in which it is located, sets the time resource for itself based on the detection result, and reports the set time resource to Donor node.
  • FIG. 33 shows a structural example of an IAB network deployment.
  • FIG. 34 shows the SSB transmission position of the donor node DN.
  • FIG. 35 shows the reception and transmission positions of BH and SSB of RN1-1.
  • FIG. 36 shows the reception and transmission positions of BH and SSB of RN1-2.
  • FIG. 37 shows the receiving and transmitting positions of BH and SSB of RN1-3.
  • FIG. 38 shows the reception and transmission positions of the RN1-1 and the BHSSB of the child nodes.
  • Fig. 39 shows the receiving and transmitting positions of RN1-2 and BHSSB of the child nodes.
  • FIG. 40 shows a case where the SSB positions of RN2-2 and RN2-3 collide.
  • the donor node can obtain the geographic location information and interconnection information of all connected IAB nodes from the core network, including the number of hops where the IAB node is located and the situation of the connected IAB node, and centrally configure the IAB node for the backhaul link.
  • SSB resource location for sending and receiving.
  • the donor node may allocate all the IAB nodes of hop1 to the BHSSB.
  • the BH position of the donor node can be fixed, as shown in Figure 34.
  • the donor node can configure the hop1 IAB node, and firstly configure the hop1 IAB node (for example, RN1-1 and RN1-2 in FIG. 33) with a connection relationship, and configure orthogonal resources for it.
  • the TX / RX positions between RN1-1 and RN1-2 cannot be orthogonal at the second SSB TX position in different fields, but RN1-1 and RN1-2 and RN1-3 Can not monitor each other, RN1-1, RN1-2 can reuse the resources of RN1-3 for SSB TX. Or RN1-3 reuses BH, SSB, TX of RN1-1 and RN1-2.
  • RN1-1, RN1-2, and RN1-3 can select some DN, BH, and SSB locations (such as the locations indicated in Figure 24) for monitoring.
  • RN1-1 can configure its child nodes (RN2-1 and RN2-2) according to its remaining SSB
  • RN1-2 can configure its child nodes (RN2-3 and RN2-4) according to its remaining SSB location. It is possible that RN2-2 and RN2-3 are configured with the same resources (as shown in Figure 38 and Figure 39).
  • DN1 coordinates the SSB positions of RN2-2 and RN2-3 during the configuration process to avoid sending and receiving conflicts (as shown in Figure 40).
  • the fields added in the SSB send and receive configuration can be as shown in Table 2-1 below.
  • the BH and SSB TX positions of the donor node remain the same and the period is adjustable.
  • other spare positions may be allocated to the UE ACSSB.
  • the donor node configures the SSB TX / RX position of its child node, and the child node configures the BH TXB / RXB of the next node according to the position of its BH TXB TX ⁇ RX.
  • Each level node informs its parent node of the configuration results. If the parent node finds a conflict, it adjusts the SSB TX.
  • a time window can be configured to monitor all surrounding candidate IAB nodes. If SSB position conflicts occur, the SSB TX can be adjusted by itself.
  • the added fields of the SSB TX / RX configuration can be the same as those shown in Table 2-1.
  • the IAB node can determine the BH and SSB positions that it can occupy in a half frame according to the number of hops. If the number of hops is greater than the number of BH and SSBs in a field, then a fixed SSB position in the field can be occupied. Specifically, the SSB signal detection may be performed first. If no SSB signal is configured at the position, the position may be configured as SSB TX, and a part of the SSB signal is selected for monitoring. After the BHSSB is configured, the remaining SSB positions can be configured with its UE and ACSSB. The IAB node can report the configuration mode to the donor node. If a conflict occurs, the donor node can adjust it.
  • FIG. 47 shows an example process showing a mapping relationship between a hop number and an SSB position configured by a node to an IAB node.
  • the link quality of the backhaul link of the relay node is lower than a predetermined threshold
  • at least part of the time resources used for SSB transmission may be adjusted to be used for SSB reception.
  • the predetermined threshold may be configured by the donor node for the relay node.
  • the IAB node when the current path quality of the IAB node is lower than the threshold, the IAB node needs to increase the SSB RX position to find more candidate IAB nodes or donor nodes. Without affecting other IAB nodes, the configured TX and SSB of the ISB node are muted to monitor other SSB locations.
  • the donor node configures its child nodes with the SSB TX threshold condition and the SSB TX resource location.
  • the threshold condition is reached, the IAB node will monitor at SSB TX.
  • RRC radio resource control
  • the corresponding time-frequency resources may be adjusted for SSB transmission.
  • the donor node may appropriately adjust the SSB RX / TX positions of two adjacent IAB nodes according to the path quality of the IAB node and the load condition of the cell. This process is shown in Figure 49.
  • the newly added fields of RRC signaling may be similar to the Muting BH and SSB position fields in Table 2-4.
  • the adjustment may be performed in the following manner: When the link quality of the return link of the relay node is lower than a predetermined threshold, the relay node sends a request to the donor node, and the donor node is a relay based on the request. Nodes configure more time resources for SSB reception.
  • the IAB node may actively request to be configured with more SSB listening positions, and the donor node may instruct the SSB RX group according to the configuration around the IAB node. This process is shown in Figure 50.
  • the new field in the mute SSB resource can be similar to the Muting BH and SSB position fields in Table 2-4.
  • the above embodiments can coordinate the SSB / CSI-RS configuration mode between adjacent IAB nodes, so that adjacent IAB nodes can discover each other.
  • UE may be interfered by SSB (AC or BH) signals from neighboring cells.
  • the signal power of the BHSSB is large. If the main frequency band and sub-carrier frequency band of the IAB donor node and the IAB node adopt the same mode, then their SSB patterns (patterns) are the same. In this case, the BHSSB of the IAB donor node and the ACSSB of the IAB node are transmitted in the same time, and the BHSSB will affect the UE's monitoring of the ACSSB.
  • IAB node 1 and IAB node 2 have the same main frequency and the same subcarrier interval, then IAB node 1 sends BH and SIB and IAB node 2 sends ACSSB at the same time-frequency resource.
  • the power of BH / SSB is relatively large, then BH / SSB will affect AC / SSB.
  • the configuration information of the reference signal may include a manner in which an adjacent node sends an SSB for an access link and an SSB for a backhaul link.
  • This method may include that neighboring nodes send SSBs for access links and SSBs for backhaul links through orthogonal time resources.
  • the SSBs sent by the two IAB nodes to BH and AC are orthogonal.
  • the BHSSB position of the parent IAB node cannot be transmitted by the child IAB node to the ACSSB.
  • the configuration process is shown in Figure 52 and Figure 53.
  • the IAB donor node directly indicates the locations where the surrounding IAB nodes cannot send the ACSSB.
  • the IAB donor node directly indicates the locations where IAB node 1 and IAB node 2 cannot send the ACSSB.
  • UnavailableACSSB A bit string indicating the non-configurable AC / SSB resources of the IAB node
  • the manner in which the neighboring node sends the SSB for the access link and the SSB for the backhaul link may include: the neighboring node sends the SSB for the backhaul link in a directional beam.
  • a directional beam can be introduced to send the SSB, and at the same time, a UE within the beam direction can be configured not to monitor the SSB on the BH SSB time-frequency resource.
  • the IAB donor node may instruct the IAB node to transmit the SSB signal using a directional beam.
  • the fields added by the BH directional beam are shown in Table 3-2 below.
  • BH-SSB-Finerbeam-RXresource Receiving time-frequency resources of bit strings and SSB directional beams BH-SSB-Finerbeam-TXdirection Bit string, SSB directional beam transmission direction configuration BH-SSB-Finerbeam-period Bit string, SSB cycle configuration
  • the parameter configuration can coordinately ensure that the UE is not interfered by the neighboring IAB, BH, and SSB.
  • an IAB node receives an SSB signal or a CSI-RS signal
  • the delay of the selected cell may not meet the requirements or the selection may be increased. Problems with the load of a given cell.
  • the UE performs cell access based on the signal strength of the link, and selects the cell with the best signal strength for access. When the current link quality is lower than the threshold, the cell with the best link quality is selected. Switching process. If the IAB node performs cell selection or path reselection, if only path selection is performed based on link quality, it may easily cause a large delay in the transmission of the selected path, a heavy cell load, or a low data rate of the path. Causes the IAB node to switch again or the performance is reduced. For example, as shown in FIG. 55, if RN3 is only based on the link quality, RN2 may be selected to connect instead of RN1 with a smaller hop count, which may cause a large link transmission delay. In order to improve the performance quality of the path reselection performed by the IAB node, the embodiment described below provides a solution for the link reselection of the IAB node.
  • the electronic device 200 for wireless communication includes a processing circuit 210 including a control unit 211 and an acquisition unit 213.
  • the configuration of the control unit 211 is similar to the previously described embodiment, and repeated description is omitted here.
  • the obtaining unit 213 is configured to obtain hop count information, and the hop count information indicates a relay hop number of the relay node from the donor node.
  • the hop count of the IAB node in the IAB topology can affect the selection and reselection of other IAB nodes.
  • the definition and indication of the number of hops in the network are also issues that should be considered. Because the number of IAB nodes and the number of hops that an IAB donor node can connect to is uncertain, it is reasonable to start from the IAB donor node to calculate the number of hops where the IAB node is located. As the IAB node expands, the number of hops is increased stepwise can.
  • the number of relay hops of the relay node transmitting the reference signal may be determined based on a predetermined correspondence between the resource position of the reference signal and the number of relay hops.
  • the reference signal may include SSB and CSI-RS, for example.
  • the reference signal for determining the number of hops may also include a system information block signal such as MIB or SIB (which is a broadcast signal). The above-mentioned predetermined correspondence relationship may be notified to the relay node by the donor node.
  • the hop count information is implicitly indicated. More specifically, the number of hops where the IAB node is located is mapped to the location of the sending BH.
  • IAB node 1 listens to the SSB signal of IAB node 2, IAB node 1 learns the number of hops where IAB node 2 is located according to the location of the SSB. If node 1 joins IAB node 2, the number of hops of IAB node 1 can be increased by 1, and then IAB node 1 sends BHSSB at the SSB position corresponding to the number of hops.
  • hop count of the IAB donor node is hop0
  • hop count of the IAB node connected to the hop0 node (IAB donor node) is hop1
  • hop count of the IAB node connected to the hop1 node is hop2, and so on.
  • the hop number information is implicitly indicated to the child IAB node by discovering the resource position of the signal, or the resource position of the synchronization signal, or the resource position of the MIB / SIB signal.
  • the UE or the child IAB node obtains the hop count information according to the position of the resource of the received signal.
  • the location information of the resource can be configured by the IAB donor node, and the mapping list (signal resource and hop count) is sent to the child IAB node.
  • Table 4-1 shows an example of the mapping list of signal resources and hop counts.
  • the obtaining unit 213 may also be configured to obtain the hop count information from a main system information block, a radio resource control signaling, or a reference signal sent by the node.
  • the hop count information can be explicitly indicated.
  • the hop number information of the IAB node may be stored in the MIB information, and the IAB node may obtain the hop number of the connected IAB node by monitoring the MIB information of the connected IAB node.
  • the parent IAB node or the IAB donor node may indicate the number of hops of the child IAB node through RRC signaling (the indicated number may be the number of hops of the parent IAB node or the number of hops of the child IAB node).
  • the parent IAB node or IAB donor node can indicate the number of hops by the discovery signal (SSB signal or CSI-RS signal), so that the IAB can effectively select the appropriate parent IAB node or IAB donor node through the discovery signal .
  • the discovery signal SSB signal or CSI-RS signal
  • reselection of the backhaul link may be performed according to the hop count information.
  • the electronic device 300 for wireless communication includes a processing circuit 310 including a control unit 311, an acquisition unit 313, and a reselection unit 315.
  • the configurations of the control unit 311 and the acquisition unit 313 are similar to the previously described embodiments, and duplicate descriptions are omitted here.
  • the reselection unit 315 is configured to perform reselection of the return link based on the following conditions: the number of hops of the currently connected node and the candidate connection node; and / or the link quality of the currently connected node and the candidate connection node.
  • the reselection unit 315 may be configured to determine to switch to the candidate connection node if the condition of the candidate connection node is better than the current connection node.
  • the IAB node switches as long as it detects an appropriate link.
  • the IAB node obtains the link quality of the candidate IAB node and the number of hops based on the SSB signal. First, it can be determined whether the number of hops is greater than the current number of hops. If it is not greater than the current number of hops, the link quality is judged Whether it is better than the current link quality. If it is better than the current link quality, perform link reselection. If the measured link quality is not better than the current link quality, the current link is maintained and the candidate IAB node continues to be monitored.
  • the hop count of the candidate node is greater than the hop count of the current node, determine whether the current link quality is less than a certain threshold (emergency switching), and if it is less than the current threshold, then compare the link quality of the candidate node with the link of the current node Quality, if the link quality of the candidate node is greater than the link quality of the current node, the handover is performed.
  • the link quality threshold condition can be configured by the parent IAB node or by itself.
  • FIG. 58 shows the signaling flow of this example mode.
  • the threshold condition is configured by the donor node or the parent IAB node.
  • the new RRC fields can be shown in Table 4-5.
  • the reselection unit 315 may also be configured to select a candidate connection node to switch to according to a condition of a plurality of candidate connection nodes measured within a given time window.
  • the IAB node obtains the link quality and hop count of the candidate IAB node according to the SSB signal.
  • the IAB node opens a time window and counts all the Candidate path information. An optimal path is found according to the relevant parameters. If the optimal link quality is greater than the current path quality, switch is selected, otherwise, the current path is maintained.
  • the threshold condition can be configured by the parent IAB node, or it can be configured by itself.
  • FIG. 60 shows a signaling flow in this exemplary manner.
  • the threshold condition is configured by the donor node or the parent IAB node.
  • the new RRC fields can be shown in Table 4-7.
  • the reselection unit 315 may be further configured to report the conditions of the plurality of candidate connection nodes measured in a given time window to the donor node, and the donor node selects the candidate connection node to be switched to.
  • the handover can be assisted by the IAB donor node.
  • the IAB node informs the IAB donor node of all candidate IAB node information, and the IAB donor node assists the IAB node to decide which candidate cell to switch to.
  • the IAB node can measure the link quality of the candidate node and store the candidate node in the candidate node list when the measured link quality is greater than a threshold.
  • a threshold condition for the link quality of the current path can be set.
  • the IAB node reports the candidate link set and the measured link quality to the IAB donor node, and the IAB donor node instructs the IAB Whether the node performs the handover process, which link is selected for handover, and sends the context information of the IAB node to the selected candidate IAB node to assist its path reselection.
  • Threshold conditions can be configured by the parent IAB node or by itself. When it is determined that the link quality of a link is higher than the threshold, it can be put into the candidate node list, and the list information is periodically updated to avoid that the link with poor quality still exists in the list.
  • FIG. 62 shows the signaling flow of this example mode.
  • the threshold condition is configured by the donor node or the parent IAB node.
  • the new RRC fields can be shown in Table 4-8.
  • the manner and configuration of link selection in the above embodiments can provide a more efficient and high-quality IAB link reselection manner.
  • the electronic device 400 for wireless communication includes a processing circuit 410 including a control unit 411 and a determination unit 413.
  • the configuration of the control unit 411 is similar to the previously described embodiment, and repeated description is omitted here.
  • the determining unit 413 is configured to determine an adjustment of the synchronization time of at least one of the different nodes based on a time deviation between signals of different nodes connected via the backhaul link.
  • the adjustment may include adjusting a synchronization time of the lower node in a case where a deviation between the synchronization signal block SSB of the upper node and the lower node connected via the backhaul link exceeds a predetermined threshold.
  • the way for the UE to obtain synchronization is to obtain the position of subframe 0 of a frame by listening to the SSB signal.
  • both DN1 and RN1 need to send BHSSB, then DN1 and RN1 can obtain the position of subframe # 0 in a frame by listening to each other's BHSSB signal.
  • the deviation of the position of the frame # 0 from the detected counterpart # 0 is greater than the threshold value, then the child IAB node may readjust the synchronization time by, for example, changing the TA value.
  • the configuration of the reference signal used for IAB node discovery can be adjusted according to the synchronization situation.
  • the electronic device 500 for wireless communication includes a processing circuit 510 including a control unit 511, a determination unit 513, and an adjustment unit 515.
  • the configurations of the control unit 511 and the determination unit 513 are similar to the previously described embodiments, and duplicate descriptions are omitted here.
  • the adjusting unit 515 is configured to reduce the monitoring period of the SSB for the lower node or increase the monitoring position of the SSB when the deviation between the SSB of the upper node and the lower node is greater than a predetermined upper limit.
  • the adjusting unit 515 may be configured to increase the monitoring period of the SSB or decrease the monitoring position of the SSB for a lower node when the deviation between the SSB of the upper node and the lower node is less than a predetermined lower limit.
  • the parent IAB node can configure the period and SSB position of the monitoring child BH and SSB according to the current timing accuracy. If the current accuracy is unstable and a large deviation occurs, then the period of monitoring the SSB can be reduced and the position of the monitoring SSB can be increased. If the accuracy of the current SSB is stable and the deviation value of each measurement is small, then the period of monitoring the SSB and the position of the monitoring SSB can be reduced.
  • the adjustment determined by the determining unit 413 may also include: in a case where the deviation between the synchronization signal blocks SSB received by the second node from the first node and the third node exceeds a predetermined threshold , Adjust the synchronization time of the third node.
  • the first node is an upper node of the second node
  • the second node is an upper node of the third node.
  • RN1 receives data from DN1 and RN2 at the same point in time.
  • time of receiving data from DN1 and RN2 deviates, if the deviation value is greater than a certain threshold, then RN1 readjusts RN2, so that RN2 is synchronized with DN1.
  • RN1 can first determine the alignment with the parent IAB node, then adjust the time position of its own SSB, and then adjust the synchronization time of the child BH.
  • This threshold can be configured by RN1.
  • the second node may also adjust the transition gap (UL-DL transition gap) between uplink and downlink according to the above-mentioned deviation.
  • the transition gap may be configured by the donor node or may be configured by a superior node of the second node.
  • This conversion gap can also be referred to as the receiving / transmitting conversion time or gap (RX / TX switching time / gap).
  • Tx / Rx gap (TTG) and Rx / Tx gap (RTG) are set between the downlink burst (DL burst) and the uplink burst (UL burst) to support base station transceiver conversion .
  • TTG time division duplex
  • RG Rx / Tx gap
  • a similar gap can be set to ensure the transmission and reception conversion between the relay node or the donor node. By adjusting the conversion gap according to the synchronization deviation, the transmission and reception conversion of the IAB node can be better guaranteed.
  • the determining unit 413 may determine the adjustment of the synchronization time in the following manner: the first node sends a timing configuration to a second node connected to the first node via a backhaul link; the second node is based on The timing configuration sends a synchronization maintenance signal to the first node; the first node determines the adjustment of the synchronization time of the first node or the second node based on the timing configuration and the timing of the synchronization maintenance signal.
  • a timing maintenance signal is introduced for the backhaul link.
  • a new timing synchronization signal is introduced.
  • the parent IAB node configures the child IAB node with time-frequency resources to send synchronization maintenance signals, and the parent IAB node starts the timer at the corresponding time position.
  • the parent IAB node receives the synchronization maintenance signal, it terminates the timer and calculates the duration. Compare the deviation between the duration and the previous value. If the deviation is greater than the threshold, readjust the TA to provide synchronization accuracy.
  • FIG. 66 shows the signaling flow of this example mode.
  • the timing maintenance configuration field may include time-frequency resources of the timing maintenance signal, a period for sending the timing maintenance signal, and a threshold for configuring and adjusting the TA.
  • the wireless communication method includes a step S610 of sending or receiving configuration information related to the configuration of a reference signal for a discovery process of an integrated access backhaul link IAB node.
  • FIG. 7 illustrates a configuration example of an electronic device for wireless communication according to one embodiment.
  • the electronic device 700 includes a processing circuit 710, and the processing circuit 710 includes an obtaining unit 711.
  • the obtaining unit 711 is configured to obtain hop count information, which indicates the hop count of the relay node from the donor node.
  • the donor node is an IAB node that is wired to the core network
  • the relay node is an IAB node that is not wired to the core network.
  • the obtaining of the hop count information may include determining a relay hop count of a relay node sending the SSB based on a predetermined correspondence between a time resource position of the SSB and the relay hop count.
  • the obtaining of the hop count information may include obtaining the hop count information from a main system information block sent by the relay node, radio resource control signaling, or a reference signal used for a discovery process of the IAB node.
  • FIG. 8 illustrates a configuration example of an electronic device for wireless communication according to another embodiment.
  • the electronic device 800 includes a processing circuit 810.
  • the processing circuit 810 includes an obtaining unit 811 and a reselection unit 813.
  • the obtaining unit 811 is similar to the obtaining unit 711 described previously.
  • the reselection unit 813 is configured to perform reselection of the return link based on the number of hops of the currently connected node and the candidate connected node and / or the link quality of the currently connected node and the candidate connected node.
  • the reselection unit 813 may be configured to: determine to switch to the candidate connection node if the condition of the candidate connection node is better than the current connection node; according to the conditions of multiple candidate connection nodes measured within a given time window Select the candidate connection node to switch to; or report the conditions of multiple candidate connection nodes measured within a given time window to the donor node, and the donor node selects the candidate connection node to switch to.
  • FIG. 9 shows a process example of the corresponding wireless communication method.
  • the wireless communication method includes step S910 of obtaining hop number information, where the hop number information indicates the number of hops of the relay node from the donor node.
  • the donor node is an IAB node that is wired to the core network
  • the relay node is an IAB node that is not wired to the core network.
  • FIG. 10 illustrates a configuration example of an electronic device for wireless communication according to one embodiment.
  • the electronic device 1000 includes a processing circuit 1010, and the processing circuit 1010 includes a determination unit 1011.
  • the determination unit 1011 is configured to determine an adjustment to a synchronization time of at least one of the different nodes based on a time deviation between signals of different nodes connected via a backhaul link.
  • the adjustment may include adjusting the synchronization time of the lower node if the deviation between the SSB of the upper node and the lower node connected via the backhaul link exceeds a predetermined threshold.
  • the determining unit 1011 may also determine the adjustment mode as follows: if the deviation between the synchronization signal blocks SSB received by the second node from the first node and the third node exceeds a predetermined threshold, adjust the synchronization time of the third node.
  • the first node, the second node, and the third node are connected via a backhaul link, the first node is an upper node of the second node, and the second node is an upper node of the third node.
  • the determining unit 1011 may also determine the adjustment mode as follows: the second node adjusts a transition gap between uplink and downlink according to the deviation.
  • the transition gap may be configured by the donor node or a superior node of the second node.
  • the determining unit 1011 may be configured to determine the adjustment mode by: sending the timing configuration by the first node to the second node connected to the first node via the backhaul link; and sending the synchronization maintenance to the first node by the second node based on the timing configuration Signals; and the first node determines adjustment of the synchronization time of the first node or the second node based on the timing configuration and the timing of the synchronization maintenance signal.
  • FIG. 11 illustrates a configuration example of an electronic device for wireless communication according to another embodiment.
  • the electronic device 1100 includes a processing circuit 1110, and the processing circuit 1110 includes a determination unit 1111 and an adjustment unit 1113.
  • the determination unit 1111 is similar to the determination unit 1011 described previously.
  • the adjustment unit 1113 is configured to make the lower node reduce the monitoring period of the SSB or increase the monitoring position of the SSB when the deviation between the SSB of the upper node and the lower node is greater than a predetermined upper limit; and / or If the deviation between the SSBs of the lower-level nodes is less than the predetermined lower limit, the lower-level node increases the SSB monitoring period or decreases the SSB monitoring position.
  • FIG. 12 shows a process example of the corresponding wireless communication method.
  • the wireless communication method includes a step S1210 of determining adjustment of a synchronization time of at least one of the different nodes based on a time deviation between signals of different nodes connected via a backhaul link.
  • Embodiments of the present invention further include a computer-readable medium including executable instructions that, when executed by the information processing device, cause the information processing device to execute the method according to the above-mentioned embodiments.
  • each step of the above method and each constituent module and / or unit of the above device may be implemented as software, firmware, hardware, or a combination thereof.
  • a computer for example, a general-purpose computer 1300 shown in FIG. 13
  • a program constituting software for implementing the above method from a storage medium or a network.
  • various programs various functions can be executed.
  • an arithmetic processing unit (ie, CPU) 1301 performs various processes according to a program stored in a read-only memory (ROM) 1302 or a program loaded from a storage section 1308 to a random access memory (RAM) 1303.
  • ROM read-only memory
  • RAM random access memory
  • data required when the CPU 1301 performs various processes and the like is also stored as necessary.
  • the CPU 1301, the ROM 1302, and the RAM 1303 are linked to each other via a bus 1304.
  • the input / output interface 1305 is also linked to the bus 1304.
  • the following components are linked to the input / output interface 1305: input section 1306 (including keyboard, mouse, etc.), output section 1307 (including displays, such as cathode ray tubes (CRT), liquid crystal displays (LCD), etc., and speakers, etc.)
  • input section 1306 including keyboard, mouse, etc.
  • output section 1307 including displays, such as cathode ray tubes (CRT), liquid crystal displays (LCD), etc., and speakers, etc.
  • a storage section 1308 including a hard disk, etc.
  • a communication section 1309 including a network interface card such as a LAN card, a modem, etc.
  • the communication section 1309 performs communication processing via a network such as the Internet.
  • the driver 1310 can also be linked to the input / output interface 1305 as needed.
  • a removable medium 1311 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc. is installed on the drive 1310 as needed, so that a computer program read out there
  • a program constituting the software is installed from a network such as the Internet or a storage medium such as a removable medium 1311.
  • a storage medium is not limited to the removable medium 1311 shown in FIG. 13 in which the program is stored and distributed separately from the device to provide the program to the user.
  • the removable medium 1311 include a magnetic disk (including a floppy disk (registered trademark)), an optical disk (including a compact disk read-only memory (CD-ROM) and a digital versatile disk (DVD)), and a magneto-optical disk (including a mini disk (MD) (registered trademark) ))
  • the storage medium may be a ROM 1302, a hard disk included in the storage section 1308, and the like, in which programs are stored, and are distributed to users along with the device containing them.
  • Embodiments of the present invention also relate to a program product storing a machine-readable instruction code.
  • the instruction code is read and executed by a machine, the method according to the embodiment of the present invention may be executed.
  • a storage medium for a program product carrying the above-mentioned storage machine-readable instruction code is also included in the disclosure of the present invention.
  • the storage medium includes, but is not limited to, a floppy disk, an optical disk, a magneto-optical disk, a memory card, a memory stick, and the like.
  • Embodiments of the present application also relate to the following electronic devices.
  • the electronic device can be implemented as any type of gNB or evolved Node B (eNB), such as a macro eNB and a small eNB.
  • eNB evolved Node B
  • a small eNB may be an eNB covering a cell smaller than a macro cell, such as a pico eNB, a pico eNB, and a home (femto) eNB.
  • the electronic device may be implemented as any other type of base station, such as a NodeB and a base transceiver station (BTS).
  • BTS base transceiver station
  • the electronic device may include: a main body (also referred to as a base station device) configured to control wireless communication; and one or more remote wireless headends (RRH) disposed at a place different from the main body.
  • a main body also referred to as a base station device
  • RRH remote wireless headends
  • various types of terminals described below can work as base stations by temporarily or semi-persistently performing base station functions.
  • the electronic device can be implemented as a mobile terminal (such as a smart phone, a tablet personal computer (PC), a notebook PC, a portable game terminal, a portable / dongle-type mobile router, and a digital camera)
  • Car terminals such as car navigation equipment.
  • the electronic device may be a wireless communication module (such as an integrated circuit module including a single or multiple chips) mounted on each of the terminals described above.
  • FIG. 14 is a block diagram showing an example of a schematic configuration of a smartphone 2500 to which the technology of the present disclosure can be applied.
  • the smartphone 2500 includes a processor 2501, a memory 2502, a storage device 2503, an external connection interface 2504, a camera device 2506, a sensor 2507, a microphone 2508, an input device 2509, a display device 2510, a speaker 2511, a wireless communication interface 2512, one or more An antenna switch 2515, one or more antennas 2516, a bus 2517, a battery 2518, and an auxiliary controller 2519.
  • the processor 2501 may be, for example, a CPU or a system on chip (SoC), and controls functions of an application layer and another layer of the smartphone 2500.
  • the memory 2502 includes a RAM and a ROM, and stores data and programs executed by the processor 2501.
  • the storage device 2503 may include a storage medium such as a semiconductor memory and a hard disk.
  • the external connection interface 2504 is an interface for connecting external devices such as a memory card and a universal serial bus (USB) device to the smartphone 2500.
  • the imaging device 2506 includes an image sensor such as a charge-coupled device (CCD) and a complementary metal oxide semiconductor (CMOS), and generates a captured image.
  • the sensor 2507 may include a set of sensors such as a measurement sensor, a gyroscope sensor, a geomagnetic sensor, and an acceleration sensor.
  • the microphone 2508 converts sound input to the smartphone 2500 into an audio signal.
  • the input device 2509 includes, for example, a touch sensor, a keypad, a keyboard, a button, or a switch configured to detect a touch on the screen of the display device 2510, and receives an operation or information input from a user.
  • the display device 2510 includes a screen such as a liquid crystal display (LCD) and an organic light emitting diode (OLED) display, and displays an output image of the smartphone 2500.
  • the speaker 2511 converts an audio signal output from the smartphone 2500 into a sound.
  • the wireless communication interface 2512 supports any cellular communication scheme such as LTE and LTE-Advanced, and performs wireless communication.
  • the wireless communication interface 2512 may generally include, for example, a baseband (BB) processor 2513 and a radio frequency (RF) circuit 2514.
  • the BB processor 2513 can perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing for wireless communication.
  • the RF circuit 2514 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives a wireless signal via the antenna 2516.
  • the wireless communication interface 2512 may be a chip module on which a BB processor 2513 and an RF circuit 2514 are integrated.
  • the wireless communication interface 2512 may include multiple BB processors 2513 and multiple RF circuits 2514.
  • FIG. 14 shows an example in which the wireless communication interface 2512 includes a plurality of BB processors 2513 and a plurality of RF circuits 2514, the wireless communication interface 2512 may also include a single BB processor 2513 or a single RF circuit 2514.
  • the wireless communication interface 2512 may support another type of wireless communication scheme, such as a short-range wireless communication scheme, a near field communication scheme, and a wireless local area network (LAN) scheme.
  • the wireless communication interface 2512 may include a BB processor 2513 and an RF circuit 2514 for each wireless communication scheme.
  • Each of the antenna switches 2515 switches a connection destination of the antenna 2516 between a plurality of circuits included in the wireless communication interface 2512 (for example, circuits for different wireless communication schemes).
  • Each of the antennas 2516 includes a single or multiple antenna elements, such as multiple antenna elements included in a MIMO antenna, and is used for the wireless communication interface 2512 to transmit and receive wireless signals.
  • the smartphone 2500 may include a plurality of antennas 2516.
  • FIG. 14 illustrates an example in which the smartphone 2500 includes a plurality of antennas 2516, the smartphone 2500 may include a single antenna 2516.
  • the smartphone 2500 may include an antenna 2516 for each wireless communication scheme.
  • the antenna switch 2515 may be omitted from the configuration of the smartphone 2500.
  • the bus 2517 connects the processor 2501, the memory 2502, the storage device 2503, the external connection interface 2504, the camera device 2506, the sensor 2507, the microphone 2508, the input device 2509, the display device 2510, the speaker 2511, the wireless communication interface 2512, and the auxiliary controller 2519 to each other. connection.
  • the battery 2518 supplies power to each block of the smartphone 2500 shown in FIG. 14 via a feeder, and the feeder is partially shown as a dotted line in the figure.
  • the auxiliary controller 2519 operates the minimum necessary functions of the smartphone 2500 in the sleep mode, for example.
  • the transmitting and receiving device of the device on the user equipment side may be implemented by a wireless communication interface 2512.
  • the processor 2501 or the auxiliary controller 2519 may also be implemented by the processor 2501 or the auxiliary controller 2519.
  • the power consumption of the battery 2518 can be reduced by performing a part of the functions of the processor 2501 by the auxiliary controller 2519.
  • the processor 2501 or the auxiliary controller 2519 may execute a program stored in the memory 2502 or the storage device 2503 to execute a processing circuit of an electronic device on the user equipment side or an information processing device according to an embodiment of the present invention and / or the processing unit of each unit. At least part of the function.
  • FIG. 15 is a block diagram showing an example of a schematic configuration of a gNB to which the technology of the present disclosure can be applied.
  • the gNB 2300 includes multiple antennas 2310 and a base station device 2320.
  • the base station device 2320 and each antenna 2310 may be connected to each other via a radio frequency (RF) cable.
  • RF radio frequency
  • Each of the antennas 2310 includes a single or multiple antenna elements (such as multiple antenna elements included in a multiple-input multiple-output (MIMO) antenna), and is used for the base station device 2320 to transmit and receive wireless signals.
  • the gNB 2300 may include multiple antennas 2310.
  • multiple antennas 2310 may be compatible with multiple frequency bands used by gNB 2300.
  • the base station device 2320 includes a controller 2321, a memory 2322, a network interface 2323, and a wireless communication interface 2325.
  • the controller 2321 may be, for example, a CPU or a DSP, and operates various functions of a higher layer of the base station device 2320. For example, the controller 2321 generates a data packet based on data in a signal processed by the wireless communication interface 2325, and transmits the generated packet via the network interface 2323. The controller 2321 may bundle data from multiple baseband processors to generate a bundled packet, and transfer the generated bundled packet. The controller 2321 may have a logical function that performs control such as radio resource control, radio bearer control, mobility management, admission control, and scheduling. This control can be performed in conjunction with nearby gNB or core network nodes.
  • the memory 2322 includes a RAM and a ROM, and stores a program executed by the controller 2321 and various types of control data such as a terminal list, transmission power data, and scheduling data.
  • the network interface 2323 is a communication interface for connecting the base station device 2320 to the core network 2324.
  • the controller 2321 may communicate with a core network node or another gNB via the network interface 2323.
  • the gNB 2300 and the core network node or other gNBs can be connected to each other through logical interfaces such as the S1 interface and the X2 interface.
  • the network interface 2323 may also be a wired communication interface or a wireless communication interface for a wireless backhaul line. If the network interface 2323 is a wireless communication interface, compared to the frequency band used by the wireless communication interface 2325, the network interface 2323 can use a higher frequency band for wireless communication.
  • the wireless communication interface 2325 supports any cellular communication scheme such as Long Term Evolution (LTE) and LTE-Advanced, and provides a wireless connection to a terminal located in a cell of the gNB 2300 via the antenna 2310.
  • the wireless communication interface 2325 may generally include, for example, a BB processor 2326 and an RF circuit 2327.
  • the BB processor 2326 can perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and execute layers such as L1, Medium Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP)).
  • the BB processor 2326 may have a part or all of the above-mentioned logic functions.
  • the BB processor 2326 may be a memory storing a communication control program or a module including a processor and related circuits configured to execute the program. Updating the program can change the functions of the BB processor 2326.
  • the module may be a card or a blade inserted into a slot of the base station device 2320. Alternatively, the module may be a chip mounted on a card or a blade.
  • the RF circuit 2327 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 2310.
  • the wireless communication interface 2325 may include a plurality of BB processors 2326.
  • multiple BB processors 2326 may be compatible with multiple frequency bands used by the gNB 2300.
  • the wireless communication interface 2325 may include a plurality of RF circuits 2327.
  • multiple RF circuits 2327 may be compatible with multiple antenna elements.
  • FIG. 15 shows an example in which the wireless communication interface 2325 includes a plurality of BB processors 2326 and a plurality of RF circuits 2327, the wireless communication interface 2325 may also include a single BB processor 2326 or a single RF circuit 2327.
  • the transceiver device of the wireless communication device on the base station side may be implemented by the wireless communication interface 2325.
  • At least a part of the functions of the processing circuit and / or the processing unit of the electronic device or the wireless communication device on the base station side may be implemented by the controller 2321.
  • the controller 2321 may execute at least a part of a function of a processing circuit and / or each unit of an electronic device or a wireless communication device on the base station side by executing a program stored in the memory 2322.
  • the method of the present invention is not limited to being performed in the chronological order described in the specification, but may also be performed in other chronological order, in parallel, or independently. Therefore, the execution order of the methods described in this specification does not limit the technical scope of the present invention.
  • embodiments of the present invention further include:
  • An electronic device for wireless communication includes a processing circuit configured to:
  • Control is performed to send or receive configuration information related to the configuration of the reference signal for the discovery process of the integrated access backhaul link IAB node.
  • the configuration information includes a multiplexing mode of the SSB used for the access link and the SSB used for the backhaul link.
  • the period of the SSB used for the access link is increased, and the SSB used for the backhaul link is arranged in the increased period part.
  • the SSB used for the access link is increased.
  • the reference signal includes a channel state information reference signal CSI-RS
  • the configuration information includes a multiplexing manner of a CSI-RS used for an access link and a CSI-RS used for a backhaul link.
  • the CSI-RS for the backhaul link is transmitted in a directional beam, and the CSI-RS for the access link and the CSI-RS for the backhaul link multiplex time-frequency resources.
  • the donor node configures parameter information of a directional beam for the relay node based on the physical location information of the relay node and the connection relationship between the relay nodes;
  • the donor node configures parameter information of a directional beam for the relay node and the candidate node based on the direction information about the candidate nodes around the relay node detected and reported by the relay node; or
  • the relay node sets the parameter information of the directional beam based on the direction information about the candidate nodes detected by the relay node, and reports the set parameter information to the donor node.
  • the CSI-RS for the backhaul link is transmitted in an omnidirectional manner, and the CSI-RS for the access link and the CSI-RS for the backhaul link use orthogonal time-frequency resources.
  • the donor node configures the time-frequency resource for the relay node based on the physical location information of the relay node and the connection relationship between the relay nodes; or
  • the relay node configures the time-frequency resources for its subordinate nodes, and reports the configured time-frequency resources to the donor node.
  • the configuration information includes a multiplexing manner for SSB transmission and / or reception.
  • the time resources of the SSB transmissions of adjacent nodes are orthogonal.
  • the relay node configures the time resource for its subordinate nodes, and reports the configured time resource to the donor node;
  • the relay node detects the SSB sent by the surrounding nodes based on the number of hops, and sets the time resource for itself based on the detection result, and reports the set time resource to the donor node.
  • the link quality of the backhaul link of the relay node is lower than a predetermined threshold, at least part of the time resources used for SSB transmission are adjusted to be used for SSB reception.
  • a corresponding time-frequency resource is adjusted to be used for SSB transmission.
  • the relay node If the link quality of the backhaul link of the relay node is lower than a predetermined threshold, the relay node sends a request to the donor node;
  • the donor node configures the relay node with more time resources for SSB reception based on the request.
  • the configuration information includes a manner in which an adjacent node sends an SSB for an access link and an SSB for a backhaul link.
  • the neighboring nodes send the SSB for the access link and the SSB for the backhaul link through orthogonal time resources;
  • the neighboring node sends the SSB for the backhaul link in a directional beam.
  • Acquire hop count information which indicates the hop count of the relay node from the donor node.
  • the reference signal includes a synchronization signal block SSB, a channel state information reference signal CSI-RS signal, or a system information block signal, and
  • the predetermined correspondence relationship is notified to the relay node by the donor node.
  • the link quality of the currently connected node and the candidate connected node is the link quality of the currently connected node and the candidate connected node.
  • the condition of a plurality of candidate connection nodes measured within a given time window is reported to the donor node, and the donor node selects the candidate connection node to be switched to.
  • the adjustment of the synchronization time of at least one of the different nodes is determined based on a time deviation between signals of different nodes connected via a backhaul link.
  • the synchronization time of the lower node is adjusted.
  • determining the configuration information for the lower-level node as reducing a monitoring period of the SSB or increasing the SSB Listening position; and / or
  • the configuration information is determined for the lower-level node to increase a monitoring period of the SSB or decrease the SSB Listening position.
  • the synchronization time of the third node is adjusted, wherein the first node, all The second node and the third node are connected via a backhaul link, the first node is an upper node of the second node, and the second node is an upper node of the third node.
  • the first node determines the adjustment of the synchronization time of the first node or the second node based on the timing configuration and the timing of the synchronization maintenance signal.
  • a wireless communication method including:
  • Send or receive configuration information which is related to the configuration of the reference signal used in the discovery process of the integrated access backhaul link IAB node.
  • An electronic device for wireless communication includes a processing circuit configured to:
  • hop count information which indicates the hop count of the relay node from the donor node
  • the donor node is an integrated access backhaul link IAB node that is wired to the core network
  • the relay node is an integrated access backhaul IAB node that is not wired to the core network.
  • the number of relay hops of the relay node sending the SSB is determined based on a predetermined correspondence between the time resource position of the synchronization signal block SSB and the number of relay hops.
  • the hop number information is obtained from a main system information block sent by the relay node, radio resource control signaling, or a reference signal used for the discovery process of the integrated access backhaul IAB node.
  • the link quality of the currently connected node and the candidate connected node is the link quality of the currently connected node and the candidate connected node.
  • the condition of a plurality of candidate connection nodes measured within a given time window is reported to the donor node, and the donor node selects the candidate connection node to be switched to.
  • a wireless communication method including:
  • hop count information which indicates the hop count of the relay node from the donor node
  • the donor node is an integrated access backhaul link IAB node that is wired to the core network
  • the relay node is an integrated access backhaul IAB node that is not wired to the core network.
  • An electronic device for wireless communication including a processing circuit configured to:
  • the synchronization time of the lower node is adjusted.
  • the deviation between the upper-level node and the SSB of the lower-level node is greater than a predetermined upper limit, causing the lower-level node to reduce the monitoring period of the SSB or increase the monitoring position of the SSB; and / or
  • the synchronization time of the third node is adjusted, wherein The second node and the third node are connected via a backhaul link, the first node is an upper node of the second node, and the second node is an upper node of the third node; and / or
  • the second node adjusts a transition gap between uplink and downlink according to the deviation, wherein the transition gap is configured by a donor node or a superior node of the second node.
  • the first node determines the adjustment of the synchronization time of the first node or the second node based on the timing configuration and the timing of the synchronization maintenance signal.
  • a wireless communication method including:
  • a computer-readable medium including executable instructions that, when executed by an information processing device, cause the information processing device to perform any of the operations according to (32), (38), (44) The method of one item.

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Abstract

本公开涉及电子装置、无线通信方法和计算机可读介质。根据一个实施例的用于无线通信的电子装置包括处理电路。处理电路被配置为进行控制以发送或接收配置信息，该配置信息与用于综合接入回传链路（IAB）节点的发现过程的参考信号的配置有关。

Description

电子装置、无线通信方法和计算机可读介质 技术领域
本公开一般涉及无线通信领域，更具体地，涉及与综合接入回传链路(IAB)有关的电子装置、无线通信方法以及计算机可读介质。
背景技术
为了实现5G NR(新无线)基站的灵活部署，已开始研究IAB技术，首先研究的是位置固定的中继节点。如图16所示，IAB节点A通过线缆与核心网建立连接，该节点称为IAB施主节点(donor node)。IAB节点B和C通过无线回传(backhual，BH)的方式与IAB施主建立连接，进而与核心网建立连接，节点B和C被称为IAB节点。
接入网络的IAB节点之间需要进行周期性地发现以检测周围候选的IAB节点，如图17和图18所示。该发现过程有助于找到合适的候选者建立多个BH连接或是备用连接以提供所需的稳健性。
发明内容
在下文中给出了关于本发明实施例的简要概述，以便提供关于本发明的某些方面的基本理解。应当理解，以下概述并不是关于本发明的穷举性概述。它并不是意图确定本发明的关键或重要部分，也不是意图限定本发明的范围。其目的仅仅是以简化的形式给出某些概念，以此作为稍后论述的更详细描述的前序。
根据一个实施例，一种用于无线通信的电子装置包括处理电路。处理电路被配置为：进行控制以发送或接收配置信息，该配置信息与用于综合接入回传链路节点的发现过程的参考信号的配置有关。
根据另一个实施例，一种无线通信方法包括：发送或接收配置信息，该配置信息与用于综合接入回传链路节点的发现过程的参考信号的配置有关。
根据又一个实施例，一种用于无线通信的电子装置包括处理电路。处理电路被配置为：获取跳数信息，该跳数信息指示中继节点距施主节点的中继跳数。施主节点是与核心网有线连接的综合接入回传链路节点，中继节点是 未与核心网有线连接的节点。
根据再一个实施例，一种无线通信方法包括：获取跳数信息，该跳数信息指示中继节点距施主节点的中继跳数。施主节点是与核心网有线连接的综合接入回传链路节点，中继节点是未与所述核心网有线连接的节点。
根据又一个实施例，一种用于无线通信的电子装置包括处理电路。处理电路被配置为：基于经由回传链路连接的不同节点的信号间的时间偏差，确定对不同节点中至少一个节点的同步时间的调整。
根据再一个实施例，一种无线通信方法包括：基于经由回传链路连接的不同节点的信号间的时间偏差，确定对不同节点中至少一个节点的同步时间的调整。
本发明实施例还包括一种计算机可读介质，其包括可执行指令，当可执行指令被信息处理设备执行时，使得信息处理设备执行根据上述实施例的方法。
本发明实施例，能够有效地实现IAB节点间的发现。
附图说明
本发明可以通过参考下文中结合附图所给出的描述而得到更好的理解，其中在所有附图中使用了相同或相似的附图标记来表示相同或者相似的部件。所述附图连同下面的详细说明一起包含在本说明书中并且形成本说明书的一部分，而且用来进一步举例说明本发明的优选实施例和解释本发明的原理和优点。在附图中：
图1是示出根据本发明的一个实施例的用于无线通信的电子装置的配置示例的框图；
图2是示出根据另一个实施例的用于无线通信的电子装置的配置示例的框图；
图3是示出根据又一个实施例的用于无线通信的电子装置的配置示例的框图；
图4是示出根据再一个实施例的用于无线通信的电子装置的配置示例的框图；
图5是示出根据又一个实施例的用于无线通信的电子装置的配置示例的 框图；
图6是示出根据本发明的一个实施例的无线通信方法的过程示例的流程图；
图7是示出根据本发明的一个实施例的用于无线通信的电子装置的配置示例的框图；
图8是示出根据另一个实施例的用于无线通信的电子装置的配置示例的框图；
图9是示出根据本发明的一个实施例的无线通信方法的过程示例的流程图；
图10是示出根据本发明的一个实施例的用于无线通信的电子装置的配置示例的框图；
图11是示出根据另一个实施例的用于无线通信的电子装置的配置示例的框图；
图12是示出根据本发明的一个实施例的无线通信方法的过程示例的流程图；
图13是示出实现本公开的方法和设备的计算机的示例性结构的框图；
图14是示出可以应用本公开内容的技术的智能电话的示意性配置的示例的框图；
图15是示出可以应用本公开内容的技术的gNB(5G系统中的基站)的示意性配置的示例的框图；
图16是用于说明IAB网络场景的示意图；
图17和图18是用于说明IAB节点发现场景的示意图；
图19A、图19B和图19C示出了同步信号块(SSB)的配置的示例；
图20示出了用户设备(UE)接入性能评估的示例过程；
图21示出了IAB场景的示例；
图22示出了信道状态信息参考信号(CSI-RS)的配置的示例过程；
图23示出了IAB场景的示例；
图24示出了CSI-RS的配置的示例过程；
图25示出了IAB场景的示例；
图26示出了CSI-RS的配置的示例过程；
图27示出了IAB场景的示例；
图28示出了CSI-RS的配置的示例过程；
图29示出了IAB场景的示例；
图30示出了CSI-RS的配置的示例过程；
图31是用于说明IAB节点间SSB收发冲突的情形的示意图；
图32是用于说明IAB节点的SSB间的干扰的情形的示意图；
图33示出了IAB网络部署的示例；
图34至图39示出了用于回传链路的SSB的布置的示例；
图40示出了用于回传链路的SSB的调整的示例；
图41示出了IAB场景的示例；
图42示出了SSB的配置的示例过程；
图43示出了IAB场景的示例；
图44示出了SSB的配置的示例过程；
图45示出了IAB场景的示例；
图46示出了SSB的配置的示例过程；
图47示出了IAB场景的示例；
图48示出了SSB静音的配置的示例过程；
图49示出了SSB静音的配置的另一示例过程；
图50示出了SSB静音的配置的又一示例过程；
图51A和图51B是用于说明IAB节点间的干扰的示意图；
图52至图54示出了IAB节点间的协调的示例过程；
图55是用于说明IAB链路重选的场景的示意图；
图56示出了跳数与参考信号资源的对应关系的示例；
图57和图58示出了链路重选的过程示例；
图59和图60示出了基于多个候选链路进行链路重选的过程示例；
图61和图62示出了由施主节点辅助的链路重选的过程示例；
图63和图64是用于说明节点同步测量的场景的示意图；
图65是用于说明定时维护信号的配置示例的示意图；以及
图66示出了利用定时维护信号进行节点同步的示例过程。
具体实施方式
下面将参照附图来说明本发明的实施例。在本发明的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。应当注意，为了清楚的目的，附图和说明中省略了与本发明无关的、本领域普通技术人员已知的部件和处理的表示和描述。
如图1所示，根据本实施例的用于无线通信的电子装置100包括处理电路110。处理电路110例如可以实现为特定芯片、芯片组或者中央处理单元(CPU)等。
处理电路110包括控制单元111。需要指出，虽然附图中以功能块的形式示出了例如控制单元111等，然而应理解，各单元的功能也可以由处理电路作为一个整体来实现，而并不一定是通过处理电路中分立的实际部件来实现。另外，虽然图中以一个框示出处理电路，然而电子装置可以包括多个处理电路，并且可以将各单元的功能分布到多个处理电路中，从而由多个处理电路协同操作来执行这些功能。
控制单元111被配置为进行控制以发送或接收配置信息，该配置信息与用于综合接入回传链路(IAB)节点的发现过程的参考信号的配置有关。
如前所述，根据本公开实施例的电子装置用于IAB节点的发现。为了更加灵活且密集地部署蜂窝小区，IAB被引入以实现基站之间的无线连接。网络中存在部分基站(IAB施主节点)采用例如光纤线缆的方式与核心网连接，其余部署的接入点(小基站或是中继设备)(在本文中可以成为IAB中继节点或IAB节点)通过无线链路的方式通过单跳和多跳的方式与IAB施主节点连接。连接到网络中的IAB节点需要周期性地发现周围候选的回程链路(BH)。在存在多跳连接的情况下，链路上相邻的两个节点中距离施主节点更近的节点可以被称为上级节点或父节点，距离施主节点更远的节点可以被称为下级节点或子节点。
根据本实施例的电子装置可以实现在IAB施主节点或IAB中继节点侧。当实现在施主节点侧时，电子装置例如可以将配置信息发送给下级节点。当 实现在中继节点侧时，电子装置可以从施主节点接收配置信息，或者可以将配置信息发送给下级节点。
此外，当配置信息还与用户设备(UE)与接入点(IAB节点)之间的接入链路(AC)有关时，电子装置也可以实现在UE侧，并且例如可以从接入点接收配置信息。
作为示例，同步信号块(SSB)或信道状态信息参考信号(CSI-RS)可以作为用于IAB节点的发现过程的参考信号。
根据一个实施例，配置信息包括用于接入链路的SSB与用于回传链路的SSB的复用方式。
UE进行小区接入的SSB信号是以一个半帧为单元进行配置的。基站进行周期性地广播，通过系统信息块SIB2和SIB 4给UE配置测量周期以及测量持续时间，也可以通过专门的信令进行配置。为了不对UE的接入造成干扰，用于接入链路的SSB(AC SSB)和用于回传链路的SSB(BH SSB)在时间上是正交的。
根据一个示例方式，可以将用于接入链路的SSB的周期内的部分SSB资源位置分配给用于回传链路的SSB。
如图19A的所示，在以一个半帧(5ms)为单元进行配置的SSB信号中，可以将一部分SSB资源位置(例如后面两个)分配给BH SSB。
根据另一个示例方式，可以增大用于接入链路的SSB的周期，在增加的周期部分中布置用于回传链路的SSB。
如图19B所示，将以一个半帧(5ms)为周期扩展为以两个半帧(10ms)为周期，并且将所增加的一个半帧内的SSB资源位置配置给BH SSB。需要中指出，可以不将增加的周期部分中的全部SSB资源位置配置给BH SSB，而是可以将部分SSB资源位置配置给AC SSB。
此外，也可以采样上述方式的组合，即，在将AC SSB的原有周期内的部分SSB资源位置分配给BH SSB的同时，增大AC SSB的周期并在增加的周期部分中布置BH SSB，如图19C所示。
本发明不限于上述示例中的具体配置，例如AC SSB与BH SSB的数量和位置等。
此外，为了降低对接入UE的影响，可以引入UE接入质量监督机制，当AC SSB和BH SSB配置好之后，可以周期性检测UE的接入性能以及同 步性能，并且在接入性能下降的情况下进行相应调整。
根据一个实施例，可以基于用户设备的接入性能调整AC SSB和BH SSB的复用方式。例如，在接入性能降低的情况下，可以增加用于接入链路的SSB。
例如，该调整可以是在用户设备的接入时延超过预定阈值的情况下被触发的。
更具体地，可以引入接入时延阈值，当由于AC SSB减少而导致UE接入时延大于阈值的时候，UE可以向IAB节点申请AC SSB。该阈值可以是预先配置好的，或者可以是从SSB信号中获取的。响应于UE的请求，IAB节点可以调整AC SSB位置。如图20所示。
例如，可以通过在SSB信号中增加字段信息来指示接入延迟阈值，如下面的表1-1所示。
表1-1
字段 值和描述
AC latency threshold 位串，UE接入时延阈值
UE接入监听SSB资源的调整可以遵循现有的SSB监听配置,包括持续时间(监听的子帧数)和监听周期(5ms,10ms,20ms,40ms,80ms…)。
此外，对AC SSB的调整过程例如可以包括通过专门的信令给UE配置额外的AC SSB位置或者减小UE SSB监听的周期。或者，可以减少半帧内BH SSB位置或者增加BH SSB周期以用于AC SSB。
此外，对于未接入网络的UE来说，由于UE在接入小区之前并不知道小区的AC SSB位置，很可能检测到BH SSB。
为了使UE能够判断所接收的SSB是AC SSB还是BH SSB，可以采用功率级别来区分AC SSB和BH SSB，例如当接收到的SSB在某个范围内则认为是AC SSB。或者，可以保留部分SSB位置专门用于UE(未接入网络)的AC SSB。
相应地，根据一个实施例，可以对用于接入链路的SSB和用于回传链路的SSB分别应用不同的功率级，或者可以将特定SSB资源位置设置为用于接入链路的SSB。
上面描述了利用SSB作为IAB节点发现过程的参考信号的示例实施例。如前所述，CSI-RS也可以作为用于IAB节点的发现过程的参考信号。CSI-RS传输可以单独配置用于某些连接，而不会对其他连接或测量产生直接影响。此外，CSI-RS传输可以被配置用于比SSB的波束更窄的波束，因此可以为候选BH链路提供波束评估的可能性，这对于快速切换到候选链路的连接是有益的。
相应地，用于IAB节点的发现过程的参考信号可以包括CSI-RS，并且关于参考信号的配置信息可以包括用于接入链路的CSI-RS(AC CSI-RS)与用于回传链路的CSI-RS(BH CSI-RS)的复用方式。
根据一个实施例，可以以定向波束发送用于回传链路的CSI-RS，并且用于接入链路的CSI-RS与用于回传链路的CSI-RS复用时频资源。
更具体地，施主节点可以基于中继节点的物理位置信息以及中继节点间的连接关系，为中继节点配置定向波束的参数信息。例如，施主节点可以从核心网获取中继节点的物理位置信息或者连接情况。另外，中继节点的物理位置信息以及中继节点间的连接关系也可以是由中继节点上报给施主节点的。
施主节点可以给中继节点配置BH SCI-RS的定向波束的参数信息，参数例如可以包括定向波束的发射方向、时频资源以及所监听的定向波束的时频资源等。
施主节点配置的时频资源可以是周期地、非周期地或者半静态地调度的。图22示出了在图21所示的示例场景下进行配置的信令流程。在图22中，hop1表示跳数为1的中继节点即施主节点的子节点，hop2表示跳数为2的中继节点即hop1节点的子节点，hop3表示跳数为3的中继节点即hop2节点的子节点。如图22所示，施主节点将hop1节点、hop2节点和hop3节点的CSI-RS发送接收配置发送给hop1节点，hop1节点将hop2节点和hop3节点的CSI-RS发送接收配置发送给hop2节点，hop2节点将hop3节点的CSI-RS发送接收配置发送给hop3节点。
施主节点提供的CSI-RS发送接收配置中新增的字段(如下面的表1-2所示)可以包括全部子节点的配置，每个子节点获取其配置。
表1-2
字段 值和描述
BH CSI-RS beam direction(子节点) 位串
BH CSI-RS resource type(子节点) {非周期，半静态、周期}
BH CSI-RS-ResourceSetList(子节点) 位串，发送CSI-RS所用的资源
BH CSI-measConfig(子节点) 单元，IAB节点监听CSI-RS的资源
此外，施主节点可以基于中继节点检测并上报的关于中继节点周围的候选节点的方向信息，为中继节点和候选节点配置定向波束的参数信息。
图23示出了一个示例场景，其中hop1 IAB节点1表示跳数为1的一个中继节点，hop1 IAB节点2表示跳数为1的另一个中继节点，hop2 IAB节点表示跳数为2的中继节点即hop1 IAB节点1的子节点。
IAB节点根据SSB信号监测周围的候选的IAB节点，并上报给施主节点，如图24所示。施主节点一方面对IAB节点1指示CSI-RS接收和发送的资源，一方面对IAB节点2指示CSI-RS接收和发送的资源。
所配置的时频资源可以是周期的、非周期的、半静态调度的。
作为示例，CSI-RS接收配置可以增加的字段如下面的表1-3所示。
表1-3
Figure PCTCN2019098956-appb-000001
同时施主节点还可以指示相应的中继节点传输CSI-RS的时频资源以及传输方向信息。
另外，中继节点可以基于其检测的关于周围的候选节点的方向信息设置定向波束的参数信息，并将所设置的参数信息上报给施主节点。
例如，IAB节点可以根据SSB信号监测周围的候选的IAB节点，并根据SSB信号方向配置CSI-RS的方向，并根据剩余的CSI-RS时间资源，自行配置CSI-RS定向波束的发送方向以及时频资源，并将CSI-RS定向波束的时频资源上报给施主节点。施主节点可以进行审核和调整，并配置CSI-RS接收时频资源位置。然后IAB节点可以在被配置的资源上传输CSI-RS。其示例场景和过程如图25和图26所示。
CSI-RS配置报告的新增的字段例如如下面的表1-4所示。
表1-4
字段 值和描述
BH CSI-RS-ResourceSetList(子节点) 位串，发送CSI-RS所用的资源
前面描述了以定向波束发送CSI-RS的示例方式。此外，根据一个实施例，可以以全向的方式发送用于回传链路的CSI-RS，并且用于接入链路的CSI-RS与用于回传链路的CSI-RS采用正交的时频资源。
例如，可以固定一部分CSI-RS资源专门用于AC CSI-RS，将剩余CSI-RS资源根据UE链路质量进行分配，可以通过广播信息广播可用的AC CSI-RS接收组，也可以通过专门的高层信令指示UE AC CSI-RS接收组。同样地，将被分配的BH CSI-RS接收组通过广播的信息为其子节点进行配置，也可以通过专门的高层信令给IAB节点进行指示。可以采用两种CSI-RS配置方式，即集中配置方式和分布式配置方式。
相应地，根据一个实施例，施主节点基于中继节点的物理位置信息以及中继节点间的连接关系，为中继节点配置CSI-RS的时频资源。
更具体地，施主节点可以根据地理位置信息以及每个中继节点的连接关系为中继节点配置CSI-RS接收发送时间资源。其示例场景和过程如图27和图28所示。施主节点首先为hop1 IAB节点配置CSI-RS RX资源，然后将剩余的BH CSI-RS时间资源配置给hop1 IAB节点配置。首先给具有连接关系以及相邻关系的hop1 IAB节点进行配置,保证其CSI-RS在时间上是正交的，其配置可以包括BH CSI-RS发送和BH CSI-RS接收(监听同跳IAB节点)，然后配置独立的hop1 IAB节点CSI-RS发送时间资源(可以复用任意hop1 IAB节点的CSI-RS资源)。然后，根据hop2 IAB节点所连接的hop1 IAB节 点为hop2 IAB节点配置CSI-RS接收时间资源，然后为相互连接的hop2 IAB节点配置CSI-RS发送资源，保证时间资源正交，同时配置CSI-RS接收，再为独立的hop2 IAB节点配置CSI-RS发送。依次类推，直至配置完所有的中继节点。
CSI-RS发送接收配置中所增加的字段可以如下面的表1-5所示。
表1-5
Figure PCTCN2019098956-appb-000002
上面描述了集中配置方式。另一方面，中继节点可以为其下级节点配置时频资源，并将所配置的时频资源上报给施主节点。
更具体地，父节点可以为其子节点配置CSI-RS接收时间资源(监听父节点和监听其他的IAB节点)和CSI-RS发送时间资源。然后，子节点再为其子节点配置CSI-RS发送接收资源，保障其子节点CSI-RS时间资源正交，并向其父节点报告。假设所有的父节点保存所有其子节点的CSI-RS配置信息，当父节点检测到CSI-RS检测冲突的时候进行调节。其示例场景和过程如图29和图30所示。
CSI-RS发送接收配置中所增加的字段可以如下面的表1-6所示。
表1-6
字段 值和描述
BH CSI-RS resource type {非周期，半静态、周期}
BH CSI-RS-ResourceSetList 位串，发送CSI-RS所用的资源
BH CSI-measConfig 位串，IAB节点监听CSI-RS的资源
通过上述实施例，可以在保障UE接入性能的情况下，提供BH SSB/CSI-RS资源配置方式。
此外，由于半双工的限制，IAB节点不能在一个时隙内同时传输和接收SSB信号。如图31所示，若两个相邻的IAB节点(RN1和RN2)在相同的时间内传输和同时接收SSB，那么RN1和RN2无法监听到彼此的SSB信号。此外，如图32所示，若RN1和RN2同时传输SSB信号，导致RN3无法准确区分SSB信号是来自RN1还是RN2。
为了保障所有的IAB节点能够周期性监听到周围的候选的IAB节点以备不时之需，那么首先IAB节点与相邻节点的SSB发送的时间资源应该正交，IAB节点配置SSB接收组，能够周期性地监听尽可能多的周围的候选节点。
相应地，根据一个实施例，与参考信号有关的配置信息可以包括针对SSB的发送和/或接收的复用方式。
复用方式可以包括相邻接点的SSB的发送的时间资源正交。
例如，可以通过以下方式确定上述复用方式：施主节点基于中继节点的物理位置信息以及中继节点间的连接关系，为中继节点配置SSB的发送的时间资源；中继节点为其下级节点配置时间资源，并将所配置的时间资源上报给施主节点；或者中继节点基于其所在跳数检测周围节点发送的SSB，根据检测结果为自己设置时间资源，并将所设置的时间资源上报给施主节点。
下面，结合具体示例对上述三种方式进行说明。
首先，说明由施主节点集中控制SSB配置的示例方式。图33示出了IAB网络部署的结构示例。图34示出了施主节点DN的SSB发送位置。图35示出了RN1-1的BH SSB的接收和发送位置。图36示出了RN1-2的BH SSB的接收和发送位置。图37示出了RN1-3的BH SSB的接收和发送位置。图38示出了RN1-1和子节点的BH SSB的接收和发送位置。图39示出了RN1-2和子节点的BH SSB的接收和发送位置。图40示出了RN2-2和RN2-3的SSB位置冲突的情况。
施主节点可以从核心网获取所连接的所有的IAB节点的地理位置信息以及相互连接信息，包括IAB节点所在的跳数和所连接的IAB节点的情况，集中给IAB节点配置用于回传链路的SSB的发送接收的资源位置。
在已经根据前述实施例的方式分配了AC SSB位置和BH SSB位置的情况下，施主节点可以将所有的给hop1的IAB节点分配BH SSB。根据SSB的复用方式，例如对于在每个半帧内都存在AC SSB和BH SSB的情况，可以固定施主节点的BH SSB位置，如图34，每个半帧的第一个位置配置为BH SSB。
然后，施主节点可以配置hop1 IAB节点，首先配置具有连接关系的hop1 IAB节点(例如图33中的RN1-1和RN1-2)，为其配置正交的资源。如图35所示，在不同的半帧的第二个SSB TX位置，RN1-1和RN1-2之间的TX/RX位置不可以正交，但是RN1-1和RN1-2与RN1-3互相无法监听到，RN1-1,RN1-2可以复用RN1-3的资源进行SSB TX。或者RN1-3复用RN1-1和RN1-2的BH SSB TX。RN1-1、RN1-2和RN1-3可以选择部分DN BH SSB位置(如图24中指示的位置)进行监听。
RN1-1可以根据其剩余的SSB配置其子节点(RN2-1和RN2-2)，RN1-2可以根据其剩余的SSB位置配置其子节点(RN2-3和RN2-4)。有可能RN2-2和RN2-3配置了相同的资源(如图38和图39所示)。DN1在配置过程中集中协调RN2-2和RN2-3的SSB位置，避免发送和接收冲突(如图40所示)。
上述配置方式的示例场景和过程如图41和图42所示。
SSB发送接收配置中增加的字段可以如下面的表2-1。
表2-1
Figure PCTCN2019098956-appb-000003
Figure PCTCN2019098956-appb-000004
接下来，说明逐级配置IAB节点的BH SSB的示例方式。
在这种方式下，施主节点的BH SSB TX位置依旧，并且周期可调。当增加周期时，可以将空余的其他位置配置给UE AC SSB。施主节点配置其子节点的SSB TX/RX位置，子节点根据其BH SSB TX\RX的位置，配置下一级节点的BH SSB TX/RX。
每级节点将配置结果告知其父节点，父节点若发现冲突，进行SSB TX调整。
另外，对于每级节点，可以配置一个时间窗去监听周围所有的候选IAB节点，若出现SSB位置冲突则可以自行调整SSB TX。
上述配置方式的示例场景和过程如图43和图44所示。
SSB TX/RX配置增加的字段可以与表2-1所示的相同。
接下来，说明分布式IAB节点自配置BH SSB TX/RX的示例方式。
IAB节点根据其所在的跳数，可以判断其在半帧内可占用的BH SSB位置。若跳数大于半帧内BH SSB数量，那么可以占用半帧内的固定的SSB位置。具体地，可以先进行SSB信号检测，若发现该位置没有SSB信号被配置，则可以将该位置配置为SSB TX，并选择部分SSB信号进行监听。配置好BH SSB之后，可以将剩余的SSB位置配置其UE AC SSB。IAB节点可以将配置方式上报给施主节点，若产生冲突，施主节点可以进行调整。
上述配置方式的示例场景和过程如图45和图46所示。
SSB配置报告和SSB配置调整中增加的字段可以如下面的表2-2所示。
表2-2
字段 值和描述
BH SSB-TX-period 位串，SSB信号的发送周期
BH SSB-TX-resource 位串，SSB信号的发送的子帧位置
图47示出了示出节点给IAB节点配置跳数与SSB位置的映射关系的示例过程。
该过程所增加的字段可以如下面的表2-3所示。
表2-3
Figure PCTCN2019098956-appb-000005
此外，根据一个实施例，在中继节点的回传链路的链路质量低于预定阈值的情况下，可以将用于SSB发送的至少部分时间资源调整为用于SSB接收。该预定阈值可以是施主节点为中继节点配置的。
换句话说，当IAB节点的当前的路径质量低于阈值的时候，IAB节点需要增加SSB RX位置以发现更多的候选的IAB节点或施主节点。在对其它的IAB节点不产生影响的情况下，将其被配置的TX SSB静音(muting)，来监听其它的SSB位置。
其示例过程如图48所示，施主节点为其子节点配置SSB TX静音阈值条件以及SSB TX的资源位置，当阈值条件达到的时候，IAB节点将在SSB TX进行监听。
无线资源控制(RRC)信令中应该增加的字段例如如下面的表2-4所示。
表2-4
字段 值和描述
Muting threshold 位串，触发静音的链路状态阈值
Muting BH SSB position 位串，被静音的BH SSB位置
此外，在将至少部分时间资源调整为用于SSB接收的情况下，针对中继节点的邻近节点，可以将相应时频资源调整为用于SSB发送。
更具体地，施主节点可以根据IAB节点的路径质量以及小区的负载状况，适当调整相邻的两个IAB节点的SSB RX/TX位置。该过程如图49所示。
RRC信令新增的字段可以类似于表2-4中Muting BH SSB position字段。
另外，该调整可以是通过以下方式进行的：在中继节点的回传链路的链路质量低于预定阈值的情况下，由中继节点向施主节点发出请求，施主节点基于请求为中继节点配置更多的用于SSB接收的时间资源。
更具体地，当IAB节点的路径质量低于阈值时，IAB节点可以主动请求被配置更多的SSB监听位置，施主节点可以根据IAB节点周围配置情况指示SSB RX组。该过程如图50所示。
静音SSB资源中新增的字段可以类似于表2-4中Muting BH SSB position字段。
上述实施例能够协调相邻的IAB node之间SSB/CSI-RS配置方式，使得相邻的IAB node能够发现彼此。
此外，在一个IAB节点的AC和BH SSB位置相互正交，并且相邻小区的BH SSB TX和RX相互协调的情况下，由于相邻的两个IAB节点有重叠的覆盖范围，那么重叠范围内的UE有可能会受到来自邻小区的SSB(AC或BH)信号的干扰。
更具体地，如图51A所示，由于IAB施主节点和IAB节点之间的距离较远，所以BH SSB的信号功率较大。如果IAB施主节点和IAB节点的主频段和子载波频段采用相同的模式，那么它们的SSB模式(pattern)是相同的。在这种情况下，IAB施主节点的BH SSB和IAB节点的AC SSB在相同的时间内传输，BH SSB会对UE监听AC SSB产生影响。
另外，如图51B所示，IAB节点1和IAB节点2若具有相同的主频和相同的子载波间隔，那么IAB节点1发送BH SSB和IAB节点2发送AC SSB在相同的时频资源，由于BH SSB的功率相对较大，那么BH SSB就会对AC SSB产生影响。
针对上述问题，根据一个实施例，参考信号的配置信息可以包括相邻节点发送用于接入链路的SSB和用于回传链路的SSB的方式。该方式可以包括相邻节点通过正交的时间资源发送用于接入链路的SSB和用于回传链路的SSB。
更具体地，若两个相邻的IAB节点具有相同的主频资源或是具有相同的子载波带宽，那么两个IAB节点发送BH和AC的SSB是正交的。父IAB节点的BH SSB位置不能被子IAB节点传输AC SSB。
该配置过程如图52和图53所示。在图52所示的方式中，IAB施主节点直接指示周围IAB节点不可发送AC SSB的位置。在图53所示的方式中，IAB施主节点直接指示IAB节点1和IAB节点2不可发送AC SSB的位置。
关于不可用AC SSB的指示中新增加的字段例如如下面的表3-1所示。
表3-1
字段 值和描述
UnavailableACSSB 位串，指示IAB节点不可配置的AC SSB资源
根据另一个实施例，相邻节点发送用于接入链路的SSB和用于回传链路的SSB的方式可以包括：相邻节点以定向波束发送用于回传链路的SSB。
由于IAB节点的位置是固定的，因此可以引入定向波束的方式发送SSB，同时可以配置波束方向范围内的UE不在该BH SSB时频资源上监听SSB。
如图54所示，当IAB施主节点检测到IAB节点1和IAB节点2具有相同的SSB模式时，IAB施主节点可以指示IAB节点使用定向波束传输SSB信号。
BH定向波束所新增的字段例如如下面的表3-2所示。
表3-2
字段 值和描述
BH-SSB-Finerbeam-TXresource 位串，SSB定向波束的传输时频资源
BH-SSB-Finerbeam-RXresource 位串，SSB定向波束的接收时频资源
BH-SSB-Finerbeam-TXdirection 位串，SSB定向波束的传输方向配置
BH-SSB-Finerbeam-period 位串，SSB周期配置
上述实施例中，通过参数配置，能够协调保证UE不受相邻IAB BH SSB的干扰。
此外，当一个IAB节点收到了SSB信号或CSI-RS信号时，如果根据现有小区接入方案，有可能出现选定的小区的时延(由于跳数太多)不能满足要求或是加重选定小区的负载的问题。
具体来说，UE进行小区接入的方式根据链路的信号强度，选择信号强度最好的小区进行接入，在当前的链路质量低于阈值的时候，选择链路质量最好的小区进行切换过程。若IAB节点进行小区选择或是进行路径重选时，若只根据链路质量进行路径选择，则容易造成所选择路径传输时延较大，小区负载较重或是路径的数据速率较低，进而造成IAB节点的再次切换或者性能下降。例如，如图55所示，如果RN3仅根据链路质量，则可能选择RN2进行连接，而不与跳数更小的RN1进行连接，从而有可能造成较大的链路传输时延。为了提高IAB节点进行路径重选的性能质量，接下来说明的实施例提供IAB节点链路重选的方案。
如图2所示，根据一个实施例的用于无线通信的电子装置200包括处理电路210，处理电路210包括控制单元211和获取单元213。控制单元211的配置与前面描述的实施例类似，在此省略重复说明。
获取单元213被配置为获取跳数信息，跳数信息指示中继节点距施主节点的中继跳数。
IAB节点在IAB拓扑结构中所在的跳数可以对其它IAB节点的选择和重选产生影响。跳数的定义和以及跳数在网络中的指示也是应该考虑的问题。因为一个IAB施主节点所能连接的IAB节点的数量和跳数是不确定的，从IAB施主节点开始计算IAB节点所在的跳数是比较合理的，随着IAB节点扩展，逐级增加跳数即可。
关于跳数的指示方式，根据一个实施例，可以基于参考信号的资源位置 与中继跳数之间的预定对应关系来确定发送参考信号的中继节点的中继跳数。如前所述，参考信号例如可以包括SSB和CSI-RS。另外，用于确定跳数的参考信号也可以包括系统信息块信号例如MIB或SIB(其为广播信号)。上述预定对应关系可以是由施主节点通知给中继节点的。
在该方式中，隐式地指示跳数信息。更具体地，IAB节点所在的跳数与发送BH SSB位置映射，当IAB节点1监听到IAB节点2的SSB信号时，IAB节点1根据SSB的位置得知IAB节点2所在的跳数，若IAB节点1加入IAB节点2，则在IAB节点1的跳数的基础上增加1即可，然后IAB节点1在与跳数相应的SSB位置上发送BH SSB。假定IAB施主节点的跳数是hop0，与hop0节点(IAB施主节点)连接的IAB节点的跳数为hop1，与hop1节点相连接的IAB节点的跳数为hop2，依次类推。
如图56所示，通过发现信号的资源位置，或是同步信号的资源位置，或是MIB/SIB信号的资源位置，将跳数信息隐性地指示给子IAB节点。UE或子IAB节点根据接收的信号的资源的位置获取跳数信息。资源的位置信息可以由IAB施主节点配置，将映射列表(信号资源与跳数)发送给子IAB节点。
表4-1给出了信号资源与跳数的映射列表的示例。
表4-1
跳数 资源
跳数1 资源组1
跳数2 资源组2
… …
根据另一个实施例，获取单元213也可以被配置为从节点发送的主系统信息块、无线资源控制信令或参考信号中获取跳数信息。
换句话说，可以显式地指示跳数信息。
更具体地，IAB节点的跳数信息可以存储在MIB信息里，IAB节点可以通过监听所连接的IAB节点的MIB信息，获取所连接的IAB节点的跳数。
MIB中应该增加的字段的示例如下面的表4-2所示。
表4-2
字段 值和描述
hop-order 位串(大小3-4)，IAB节点所在的跳数
或者，父IAB节点或IAB施主节点可以通过RRC信令指示子IAB节点所在的跳数(所指示的可以是父IAB节点的跳数或是子IAB节点的跳数)。
RRCReconfiguration中应该增加的字段的示例如下面的表4-3所示。
表4-3
字段 值和描述
hop-order 位串(大小3-4)，IAB节点所在的跳数
又或者，父IAB节点或IAB施主节点可以通过发现信号(SSB信号或是CSI-RS信号)指示其所在的跳数信息，这样IAB可以通过发现信号有效地选择合适的父IAB节点或IAB施主节点。
发现信号中应该增加的字段为的示例如下面的表4-4所示。
表4-4
字段 值和描述
hop-order 位串(大小3-4)，IAB节点所在的跳数
此外，根据一个实施例，还可以根据跳数信息进行回传链路的重选。
如图3所示，根据一个实施例的用于无线通信的电子装置300包括处理电路310，处理电路310包括控制单元311、获取单元313和重选单元315。控制单元311和获取单元313的配置与前面描述的实施例类似，在此省略重复说明。
重选单元315被配置为基于以下条件进行回传链路的重选：当前连接节点和候选连接节点的跳数；以及/或者当前连接节点和候选连接节点的链路质量。
更具体地，重选单元315可以被配置为在候选连接节点的条件优于当前 连接节点的情况下，则确定切换至候选连接节点。
根据本示例方式，IAB节点只要测得合适的链路就进行切换。如图57所示，IAB节点根据SSB信号获得候选IAB节点的链路质量以及所在的跳数，首先可以判断跳数是否大于当前的跳数,若不大于当前的跳数,则判断链路质量是否优于当前的链路质量，若优于当前的链路质量，进行链路重选。若测得的链路质量没有优于当前的链路质量，则保持当前链路，继续监听候选的IAB节点。若候选节点的跳数大于当前节点的跳数，则判断当前的链路质量是否小于一定的阈值(急需切换)，若小于当前阈值，再比较候选的节点的链路质量与当前节点的链路质量，若候选节点的链路质量大于当前节点的链路质量，则进行切换。链路质量的阈值条件可以由父IAB节点配置，也可以由自己配置。
图58示出了该示例方式的信令流程。在该示例中，阈值条件由施主节点或父IAB节点配置。
相应地，RRC新增字段可以如表4-5所示。
表4-5
Figure PCTCN2019098956-appb-000006
此外，重选单元315也可以被配置为根据在给定时间窗内测量的多个候选连接节点的条件选择要切换至的候选连接节点。
换句话说，在给定时间窗内测得多个候选节点，并选择最优的节点进行切换。如图59所示，IAB节点根据SSB信号获得候选IAB节点的链路质量以及所在的跳数，当IAB节点的链路质量低于阈值时，IAB节点开启时间窗，在时间窗内统计所有的候选路径的信息。根据相关参数找到最优的一条路径，若最优的链路质量大于当前的路径质量，选择切换，否则，维持当前的路径。 阈值条件可以由父IAB节点来配置，也可以自己配置。当测得某条链路的链路质量高于阈值时，将其放入候选节点列表(如下面的表4-6所示)，并且可以周期性更新列表信息，避免链路质量变差仍然存在于候选列表中。
表4-6
Figure PCTCN2019098956-appb-000007
图60示出了该示例方式的信令流程。在该示例中，阈值条件由施主节点或父IAB节点配置。
相应地，RRC新增字段可以如表4-7所示。
表4-7
Figure PCTCN2019098956-appb-000008
此外，重选单元315还可以被配置为将给定时间窗内测量的多个候选连接节点的条件上报给施主节点，并由施主节点选择要切换至的候选连接节点。
换句话说，可以由IAB施主节点辅助进行切换。如图61所示，IAB节点将所有的候选IAB节点信息告知IAB施主节点，IAB施主节点辅助IAB节点决定切换到哪个候选小区。为了降低IAB节点向IAB施主节点报告候选BH的信令开销，IAB节点可以测量候选节点的链路质量，当测得的链路质量大于阈值时将候选节点存入候选节点列表。
可以设定当前路径的链路质量的阈值条件，在当前链路质量情况低于一定阈值的时候，IAB节点向IAB施主节点报告候选链路集合以及测得的链路质量，IAB施主节点指示IAB节点是否执行切换过程，选择哪条链路进行切 换，并将该IAB节点的上下文信息发送给选定的候选的IAB节点，辅助其路径重选。阈值条件可以由父IAB节点配置也可以自己配置阈值。当测得某条链路的链路质量高于阈值时，可以将其放入候选节点列表，并且周期性更新列表信息，避免质量变差的链路仍然存在于列表中。
图62示出了该示例方式的信令流程。在该示例中，阈值条件由施主节点或父IAB节点配置。
相应地，RRC新增字段可以如表4-8所示。
表4-8
Figure PCTCN2019098956-appb-000009
上述实施例中的链路选择的方式与配置能够提供更为高效且优质的IAB链路重选方式。
此外，随着网络跳数的增加，同步误差会随着拓扑结构的增加的累积，对每条链路的同步精确度的要求也越来越高，但是根据现有的基于定时提前(TA)的同步方式难以满足同步精确度的需求，因此下面描述的实施例涉及提高同步精确度的方案。
如图4所示，根据一个实施例的用于无线通信的电子装置400包括处理电路410，处理电路410包括控制单元411和确定单元413。控制单元411的配置与前面描述的实施例类似，在此省略重复说明。
确定单元413被配置为基于经由回传链路连接的不同节点的信号间的时间偏差，确定对不同节点中至少一个节点的同步时间的调整。该调整可以包括在经由回传链路连接的上级节点与下级节点的同步信号块SSB之间的偏差超过预定阈值的情况下，调整下级节点的同步时间。
常规地，UE获取同步的方式是通过监听SSB信号来获取一个帧的子帧 0的位置。在图63中，在IAB多跳拓扑结构中，DN1和RN1都需要发送BH SSB，那么DN1和RN1通过监听彼此的BH SSB信号可以获取一个帧中的子帧#0的位置，若自己的子帧#0的位置与检测到的对方的#0的偏差大于阈值，那么子IAB节点可以例如通过更改TA值来重新调整同步时间。
此外，还可以根据同步情况调整用于IAB节点发现的参考信号的配置。
如图5所示，根据一个实施例的用于无线通信的电子装置500包括处理电路510，处理电路510包括控制单元511、确定单元513和调整单元515。控制单元511和确定单元513的配置与前面描述的实施例类似，在此省略重复说明。
调整单元515被配置为：在上级节点与下级节点的SSB之间的偏差大于预定上限的情况下，针对下级节点减小SSB的监听周期或者增加SSB的监听位置。
或者，调整单元515可以被配置为：在上级节点与下级节点的SSB之间的偏差小于预定下限的情况下，针对下级节点增大SSB的监听周期或者减少SSB的监听位置。
例如，父IAB节点可以根据当前的定时精确度情况，自行配置监听子BH SSB的周期和SSB位置。若当前的精确度不稳定，产生较大的偏差，那么可以减少监听SSB的周期和增加监听SSB的位置。若当前的SSB的精确度稳定，每次测量的偏差值较小，那么可以增加监听SSB的周期和减少监听SSB的位置。
上面描述了双向SSB监听和定时计算的示例方式。返回参照图4，根据一个实施例，确定单元413所确定调整也可以包括：在第二节点接收到的来自第一节点和第三节点的同步信号块SSB之间的偏差超过预定阈值的情况下，调整第三节点的同步时间。第一节点是第二节点的上级节点，第二节点是第三节点的上级节点。
如图64所示，RN1在同一个时间点接收来自DN1和RN2的数据，当接收来自DN1和RN2的数据时间产生偏差的时候，若该偏差值大于一定的阈值，那么RN1重新调整RN2，令RN2与DN1同步。
此外，当该偏差值大于阈值时，RN1可以首先判断与父IAB节点的对齐情况，然后调整自己的SSB的时间位置，然后调整子BH的同步时间。该阈值可以由RN1自行配置。
另外，还可以由第二节点根据上述偏差调整上行和下行之间的转换间隙 (UL-DL transition gap)。该转换间隙可以是由施主节点配置或者可以是第二节点的上级节点配置的。该转换间隙也可以称为接收送转换时间或间隙(RX TX switching time/gap)。对于时分双工(TDD)帧，Tx/Rx间隙(TTG)、Rx/Tx间隙(RTG)被设置在下行突发(DL burst)与上行突发(UL burst)之间，来支持基站收发转换。对于IAB节点，可以设置类似的间隙来保证中继节点或是施主节点之间的收发转换。通过根据同步偏差调整该转换间隙，能够更好地保证IAB节点的收发转换。
继续参照图4，根据一个实施例，确定单元413可以通过以下方式确定同步时间的调整：由第一节点向经由回传链路与第一节点连接的第二节点发送定时配置；第二节点基于定时配置向第一节点发送同步维持信号；第一节点基于定时配置和同步维持信号的定时来确定第一节点或第二节点的同步时间的调整。
在本实施例中，针对回传链路引入了定时维持信号。如图65，引入了新的定时同步信号，在这种方式下，父IAB节点给子IAB节点配置时频资源发送同步维持信号，并且父IAB节点在相应的时间位置上开启定时器，当父IAB节点收到同步维持信号时，终止该计时器，并计算持续时间。比较持续时间与之前的值的偏差值，若偏差值大于阈值，则重新调整TA来提供同步的精确度。
图66示出了该示例方式的信令流程。定时维护配置字段可以包括定时维护信号的时频资源，以及发送定时维护信号的周期，以及配置调整TA的阈值。
相应地，RRC新增字段可以如表5所示。
表5
Figure PCTCN2019098956-appb-000010
通过上述实施例，能够实现IAB节点之间更为精确的同步。
在前面对装置实施例的描述中，显然也公开了一些过程和方法。接下来， 在不重复前面描述过的细节的情况下，给出对根据本发明实施例的无线通信方法的说明。
如图6所示，根据一个实施例的无线通信方法包括发送或接收配置信息的步骤S610，该配置信息与用于综合接入回传链路IAB节点的发现过程的参考信号的配置有关。
此外，图7示出了根据一个实施例的用于无线通信的电子装置的配置示例。如图7所示，电子装置700包括处理电路710，处理电路710包括获取单元711。
获取单元711被配置为获取跳数信息，该跳数信息指示中继节点距施主节点的中继跳数。施主节点是与核心网有线连接的IAB节点，中继节点是未与核心网有线连接的IAB节点。
跳数信息的获取可以包括基于SSB的时间资源位置与中继跳数之间的预定对应关系来确定发送该SSB的中继节点的中继跳数。
跳数信息的获取可以包括从中继节点发送的主系统信息块、无线资源控制信令或用于IAB节点的发现过程的参考信号中获取跳数信息。
图8示出了根据另一个实施例的用于无线通信的电子装置的配置示例。如图8所示，电子装置800包括处理电路810，处理电路810包括获取单元811和重选单元813。获取单元811与前面描述的获取单元711类似。
重选单元813被配置为基于当前连接节点和候选连接节点的跳数和/或当前连接节点和候选连接节点的链路质量进行回传链路的重选。
更具体地，重选单元813可以被配置为：在候选连接节点的条件优于当前连接节点的情况下确定切换至候选连接节点；根据在给定时间窗内测量的多个候选连接节点的条件选择要切换至的候选连接节点；或者将给定时间窗内测量的多个候选连接节点的条件上报给施主节点，并由施主节点选择要切换至的候选连接节点。
图9示出了相应无线通信方法的过程示例。如图9所示，无线通信方法包括获取跳数信息的步骤S910，该跳数信息指示中继节点距施主节点的中继跳数。施主节点是与核心网有线连接的IAB节点，中继节点是未与核心网有线连接的IAB节点。
此外，图10示出了根据一个实施例的用于无线通信的电子装置的配置示例。如图10所示，电子装置1000包括处理电路1010，处理电路1010包括 确定单元1011。
确定单元1011被配置为基于经由回传链路连接的不同节点的信号间的时间偏差确定对不同节点中至少一个节点的同步时间的调整。
该调整可以包括在经由回传链路连接的上级节点与下级节点的SSB之间的偏差超过预定阈值的情况下调整下级节点的同步时间。
确定单元1011还可以将调整方式确定为：在第二节点接收到的来自第一节点和第三节点的同步信号块SSB之间的偏差超过预定阈值的情况下，调整第三节点的同步时间。第一节点、第二节点和第三节点经由回传链路连接，第一节点是第二节点的上级节点，第二节点是第三节点的上级节点。
确定单元1011还可以将调整方式确定为：由第二节点根据偏差调整上行和下行之间的转换间隙。转换间隙可以是由施主节点配置或者第二节点的上级节点配置的。
确定单元1011可以被配置为通过以下方式确定调整方式：由第一节点向经由回传链路与第一节点连接的第二节点发送定时配置；第二节点基于定时配置向第一节点发送同步维持信号；以及第一节点基于定时配置和同步维持信号的定时来确定第一节点或第二节点的同步时间的调整。
图11示出了根据另一个实施例的用于无线通信的电子装置的配置示例。如图11所示，电子装置1100包括处理电路1110，处理电路1110包括确定单元1111和调整单元1113。确定单元1111与前面描述的确定单元1011类似。
调整单元1113被配置为：在上级节点与下级节点的SSB之间的偏差大于预定上限的情况下使下级节点减小所述SSB的监听周期或者增加SSB的监听位置；以及/或者在上级节点与下级节点的SSB之间的偏差小于预定下限的情况下使下级节点增大SSB的监听周期或者减少SSB的监听位置。
图12了相应无线通信方法的过程示例。如图12所示，无线通信方法包括基于经由回传链路连接的不同节点的信号间的时间偏差确定对不同节点中至少一个节点的同步时间的调整的步骤S1210。
本发明实施例还包括计算机可读介质，其包括可执行指令，当可执行指令被信息处理设备执行时，使得信息处理设备执行根据上述实施例的方法。
作为示例，上述方法的各个步骤以及上述装置的各个组成模块和/或单元可以实施为软件、固件、硬件或其组合。在通过软件或固件实现的情况下，可以从存储介质或网络向具有专用硬件结构的计算机(例如图13所示的通用 计算机1300)安装构成用于实施上述方法的软件的程序，该计算机在安装有各种程序时，能够执行各种功能等。
在图13中，运算处理单元(即CPU)1301根据只读存储器(ROM)1302中存储的程序或从存储部分1308加载到随机存取存储器(RAM)1303的程序执行各种处理。在RAM 1303中，也根据需要存储当CPU 1301执行各种处理等等时所需的数据。CPU 1301、ROM 1302和RAM 1303经由总线1304彼此链路。输入/输出接口1305也链路到总线1304。
下述部件链路到输入/输出接口1305：输入部分1306(包括键盘、鼠标等等)、输出部分1307(包括显示器，比如阴极射线管(CRT)、液晶显示器(LCD)等，和扬声器等)、存储部分1308(包括硬盘等)、通信部分1309(包括网络接口卡比如LAN卡、调制解调器等)。通信部分1309经由网络比如因特网执行通信处理。根据需要，驱动器1310也可链路到输入/输出接口1305。可拆卸介质1311比如磁盘、光盘、磁光盘、半导体存储器等等根据需要被安装在驱动器1310上，使得从中读出的计算机程序根据需要被安装到存储部分1308中。
在通过软件实现上述系列处理的情况下，从网络比如因特网或存储介质比如可拆卸介质1311安装构成软件的程序。
本领域的技术人员应当理解，这种存储介质不局限于图13所示的其中存储有程序、与设备相分离地分发以向用户提供程序的可拆卸介质1311。可拆卸介质1311的例子包含磁盘(包含软盘(注册商标))、光盘(包含光盘只读存储器(CD-ROM)和数字通用盘(DVD))、磁光盘(包含迷你盘(MD)(注册商标))和半导体存储器。或者，存储介质可以是ROM 1302、存储部分1308中包含的硬盘等等，其中存有程序，并且与包含它们的设备一起被分发给用户。
本发明的实施例还涉及一种存储有机器可读取的指令代码的程序产品。所述指令代码由机器读取并执行时，可执行上述根据本发明实施例的方法。
相应地，用于承载上述存储有机器可读取的指令代码的程序产品的存储介质也包括在本发明的公开中。所述存储介质包括但不限于软盘、光盘、磁光盘、存储卡、存储棒等等。
本申请的实施例还涉及以下电子设备。在电子设备用于基站侧的情况下，电子设备可以被实现为任何类型的gNB或演进型节点B(eNB)，诸如宏eNB和小eNB。小eNB可以为覆盖比宏小区小的小区的eNB，诸如微微eNB、微eNB和家庭(毫微微)eNB。代替地，电子设备可以被实现为任何其他类 型的基站，诸如NodeB和基站收发台(BTS)。电子设备可以包括：被配置为控制无线通信的主体(也称为基站设备)；以及设置在与主体不同的地方的一个或多个远程无线头端(RRH)。另外，下面将描述的各种类型的终端均可以通过暂时地或半持久性地执行基站功能而作为基站工作。
电子设备用于用户设备侧的情况下，可以被实现为移动终端(诸如智能电话、平板个人计算机(PC)、笔记本式PC、便携式游戏终端、便携式/加密狗型移动路由器和数字摄像装置)或者车载终端(诸如汽车导航设备)。此外，电子设备可以为安装在上述终端中的每个终端上的无线通信模块(诸如包括单个或多个晶片的集成电路模块)。
[关于终端设备的应用示例]
图14是示出可以应用本公开内容的技术的智能电话2500的示意性配置的示例的框图。智能电话2500包括处理器2501、存储器2502、存储装置2503、外部连接接口2504、摄像装置2506、传感器2507、麦克风2508、输入装置2509、显示装置2510、扬声器2511、无线通信接口2512、一个或多个天线开关2515、一个或多个天线2516、总线2517、电池2518以及辅助控制器2519。
处理器2501可以为例如CPU或片上系统(SoC)，并且控制智能电话2500的应用层和另外层的功能。存储器2502包括RAM和ROM，并且存储数据和由处理器2501执行的程序。存储装置2503可以包括存储介质，诸如半导体存储器和硬盘。外部连接接口2504为用于将外部装置(诸如存储卡和通用串行总线(USB)装置)连接至智能电话2500的接口。
摄像装置2506包括图像传感器(诸如电荷耦合器件(CCD)和互补金属氧化物半导体(CMOS))，并且生成捕获图像。传感器2507可以包括一组传感器，诸如测量传感器、陀螺仪传感器、地磁传感器和加速度传感器。麦克风2508将输入到智能电话2500的声音转换为音频信号。输入装置2509包括例如被配置为检测显示装置2510的屏幕上的触摸的触摸传感器、小键盘、键盘、按钮或开关，并且接收从用户输入的操作或信息。显示装置2510包括屏幕(诸如液晶显示器(LCD)和有机发光二极管(OLED)显示器)，并且显示智能电话2500的输出图像。扬声器2511将从智能电话2500输出的音频信号转换为声音。
无线通信接口2512支持任何蜂窝通信方案(诸如LTE和LTE-先进)，并且执行无线通信。无线通信接口2512通常可以包括例如基带(BB)处理器2513和射频(RF)电路2514。BB处理器2513可以执行例如编码/解码、 调制/解调以及复用/解复用，并且执行用于无线通信的各种类型的信号处理。同时，RF电路2514可以包括例如混频器、滤波器和放大器，并且经由天线2516来传送和接收无线信号。无线通信接口2512可以为其上集成有BB处理器2513和RF电路2514的一个芯片模块。如图14所示，无线通信接口2512可以包括多个BB处理器2513和多个RF电路2514。虽然图14示出其中无线通信接口2512包括多个BB处理器2513和多个RF电路2514的示例，但是无线通信接口2512也可以包括单个BB处理器2513或单个RF电路2514。
此外，除了蜂窝通信方案之外，无线通信接口2512可以支持另外类型的无线通信方案，诸如短距离无线通信方案、近场通信方案和无线局域网(LAN)方案。在此情况下，无线通信接口2512可以包括针对每种无线通信方案的BB处理器2513和RF电路2514。
天线开关2515中的每一个在包括在无线通信接口2512中的多个电路(例如用于不同的无线通信方案的电路)之间切换天线2516的连接目的地。
天线2516中的每一个均包括单个或多个天线元件(诸如包括在MIMO天线中的多个天线元件)，并且用于无线通信接口2512传送和接收无线信号。如图14所示，智能电话2500可以包括多个天线2516。虽然图14示出其中智能电话2500包括多个天线2516的示例，但是智能电话2500也可以包括单个天线2516。
此外，智能电话2500可以包括针对每种无线通信方案的天线2516。在此情况下，天线开关2515可以从智能电话2500的配置中省略。
总线2517将处理器2501、存储器2502、存储装置2503、外部连接接口2504、摄像装置2506、传感器2507、麦克风2508、输入装置2509、显示装置2510、扬声器2511、无线通信接口2512以及辅助控制器2519彼此连接。电池2518经由馈线向图14所示的智能电话2500的各个块提供电力，馈线在图中被部分地示为虚线。辅助控制器2519例如在睡眠模式下操作智能电话2500的最小必需功能。
在图14所示的智能电话2500中，根据本发明实施例的用户设备侧的设备的收发装置可以由无线通信接口2512实现。根据本发明实施例的用户设备侧的电子装置或信息处理设备的处理电路和/或各单元的功能的至少一部分也可以由处理器2501或辅助控制器2519实现。例如，可以通过由辅助控制器2519执行处理器2501的部分功能而减少电池2518的电力消耗。此外，处理器2501或辅助控制器2519可以通过执行存储器2502或存储装置2503中 存储的程序而执行根据本发明实施例的用户设备侧的电子装置或信息处理设备的处理电路和/或各单元的功能的至少一部分。
[关于基站的应用示例]
图15是示出可以应用本公开内容的技术的gNB的示意性配置的示例的框图。gNB 2300包括多个天线2310以及基站设备2320。基站设备2320和每个天线2310可以经由射频(RF)线缆彼此连接。
天线2310中的每一个均包括单个或多个天线元件(诸如包括在多输入多输出(MIMO)天线中的多个天线元件)，并且用于基站设备2320发送和接收无线信号。如图15所示，gNB 2300可以包括多个天线2310。例如，多个天线2310可以与gNB 2300使用的多个频带兼容。
基站设备2320包括控制器2321、存储器2322、网络接口2323以及无线通信接口2325。
控制器2321可以为例如CPU或DSP，并且操作基站设备2320的较高层的各种功能。例如，控制器2321根据由无线通信接口2325处理的信号中的数据来生成数据分组，并经由网络接口2323来传递所生成的分组。控制器2321可以对来自多个基带处理器的数据进行捆绑以生成捆绑分组，并传递所生成的捆绑分组。控制器2321可以具有执行如下控制的逻辑功能：该控制诸如为无线资源控制、无线承载控制、移动性管理、接纳控制和调度。该控制可以结合附近的gNB或核心网节点来执行。存储器2322包括RAM和ROM，并且存储由控制器2321执行的程序和各种类型的控制数据(诸如终端列表、传输功率数据以及调度数据)。
网络接口2323为用于将基站设备2320连接至核心网2324的通信接口。控制器2321可以经由网络接口2323而与核心网节点或另外的gNB进行通信。在此情况下，gNB 2300与核心网节点或其他gNB可以通过逻辑接口(诸如S1接口和X2接口)而彼此连接。网络接口2323还可以为有线通信接口或用于无线回传线路的无线通信接口。如果网络接口2323为无线通信接口，则与由无线通信接口2325使用的频带相比，网络接口2323可以使用较高频带用于无线通信。
无线通信接口2325支持任何蜂窝通信方案(诸如长期演进(LTE)和LTE-先进)，并且经由天线2310来提供到位于gNB 2300的小区中的终端的无线连接。无线通信接口2325通常可以包括例如BB处理器2326和RF电路2327。 BB处理器2326可以执行例如编码/解码、调制/解调以及复用/解复用，并且执行层(例如L1、介质访问控制(MAC)、无线链路控制(RLC)和分组数据汇聚协议(PDCP))的各种类型的信号处理。代替控制器2321，BB处理器2326可以具有上述逻辑功能的一部分或全部。BB处理器2326可以为存储通信控制程序的存储器，或者为包括被配置为执行程序的处理器和相关电路的模块。更新程序可以使BB处理器2326的功能改变。该模块可以为插入到基站设备2320的槽中的卡或刀片。可替代地，该模块也可以为安装在卡或刀片上的芯片。同时，RF电路2327可以包括例如混频器、滤波器和放大器，并且经由天线2310来传送和接收无线信号。
如图15所示，无线通信接口2325可以包括多个BB处理器2326。例如，多个BB处理器2326可以与gNB 2300使用的多个频带兼容。如图15所示，无线通信接口2325可以包括多个RF电路2327。例如，多个RF电路2327可以与多个天线元件兼容。虽然图15示出其中无线通信接口2325包括多个BB处理器2326和多个RF电路2327的示例，但是无线通信接口2325也可以包括单个BB处理器2326或单个RF电路2327。
在图15所示的gNB 2300中，基站侧的无线通信设备的收发装置可以由无线通信接口2325实现。基站侧的电子装置或无线通信设备的处理电路和/或各单元的功能的至少一部分也可以由控制器2321实现。例如，控制器2321可以通过执行存储在存储器2322中的程序而执行基站侧的电子装置或无线通信设备的处理电路和/或各单元的功能的至少一部分。
在上面对本发明具体实施例的描述中，针对一种实施方式描述和/或示出的特征可以用相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的特征。
应该强调，术语“包括/包含”在本文使用时指特征、要素、步骤或组件的存在，但并不排除一个或更多个其它特征、要素、步骤或组件的存在或附加。
在上述实施例和示例中，采用了数字组成的附图标记来表示各个步骤和/或单元。本领域的普通技术人员应理解，这些附图标记只是为了便于叙述和绘图，而并非表示其顺序或任何其他限定。
此外，本发明的方法不限于按照说明书中描述的时间顺序来执行，也可以按照其他的时间顺序地、并行地或独立地执行。因此，本说明书中描述的方法的执行顺序不对本发明的技术范围构成限制。
尽管上面已经通过对本发明的具体实施例的描述对本发明进行了披露，但是，应该理解，上述的所有实施例和示例均是示例性的，而非限制性的。本领域的技术人员可在所附权利要求的精神和范围内设计对本发明的各种修改、改进或者等同物。这些修改、改进或者等同物也应当被认为包括在本发明的保护范围内。
此外，本发明实施例还包括：
(1)一种用于无线通信的电子装置，其包括处理电路，所述处理电路被配置为：
进行控制以发送或接收配置信息，所述配置信息与用于综合接入回传链路IAB节点的发现过程的参考信号的配置有关。
(2)根据(1)所述的电子装置，其中，所述参考信号包括同步信号块SSB，并且
所述配置信息包括用于接入链路的SSB与用于回传链路的SSB的复用方式。
(3)根据(2)所述的电子装置，其中，所述复用方式包括：
将用于接入链路的SSB的周期内的部分SSB资源位置分配给用于回传链路的SSB；以及/或者
增大用于接入链路的SSB的周期，在增加的周期部分中布置用于回传链路的SSB。
(4)根据(2)所述的电子装置，其中，所述复用方式是基于用户设备的接入性能调整的，所述调整包括：
在所述接入性能降低的情况下，增加用于接入链路的SSB。
(5)根据(4)所述的电子装置，其中，所述调整是在所述用户设备的接入时延超过预定阈值的情况下被触发的。
(6)根据(2)所述的电子装置，其中，所述复用方式包括：
对用于接入链路的SSB和用于回传链路的SSB分别应用不同的功率级；以及/或者
将特定SSB资源位置设置为用于接入链路的SSB。
(7)根据(1)所述的电子装置，其中，所述参考信号包括信道状态信息参考信号CSI-RS，并且
所述配置信息包括用于接入链路的CSI-RS与用于回传链路的CSI-RS的复用方式。
(8)根据(7)所述的电子装置，其中，所述复用方式包括：
以定向波束发送用于回传链路的CSI-RS，并且用于接入链路的CSI-RS与用于回传链路的CSI-RS复用时频资源。
(9)根据(8)所述的电子装置，其中，所述节点包括施主节点以及中继节点，并且所述复用方式是通过以下方式确定的：
所述施主节点基于所述中继节点的物理位置信息以及所述中继节点间的连接关系，为所述中继节点配置定向波束的参数信息；
所述施主节点基于所述中继节点检测并上报的关于所述中继节点周围的候选节点的方向信息，为所述中继节点和所述候选节点配置定向波束的参数信息；或者
所述中继节点基于其检测的关于周围的候选节点的方向信息设置定向波束的参数信息，并将所设置的参数信息上报给所述施主节点。
(10)根据(9)所述的电子装置，其中，所述中继节点的物理位置信息以及所述中继节点间的连接关系是由所述中继节点上报给所述施主节点的。
(11)根据(7)所述的电子装置，其中，所述复用方式包括：
以全向的方式发送用于回传链路的CSI-RS，并且用于接入链路的CSI-RS与用于回传链路的CSI-RS采用正交的时频资源。
(12)根据(11)所述的电子装置，其中，所述节点包括施主节点以及中继节点，并且所述复用方式是通过以下方式确定的：
所述施主节点基于所述中继节点的物理位置信息以及所述中继节点间的连接关系，为所述中继节点配置所述时频资源；或者
所述中继节点为其下级节点配置所述时频资源，并将所配置的时频资源上报给所述施主节点。
(13)根据(1)所述的电子装置，其中，所述参考信号包括同步信号块SSB，并且
所述配置信息包括针对SSB的发送和/或接收的复用方式。
(14)根据(13)所述的电子装置，其中，所述复用方式包括：
相邻接点的SSB的发送的时间资源正交。
(15)根据(14)所述的电子装置，其中，所述节点包括施主节点以及中继节点，并且所述复用方式是通过以下方式确定的：
所述施主节点基于所述中继节点的物理位置信息以及所述中继节点间的连接关系，为所述中继节点配置SSB的发送的时间资源；
所述中继节点为其下级节点配置所述时间资源，并将所配置的时间资源上报给所述施主节点；或者
所述中继节点基于其所在跳数检测周围节点发送的SSB，根据检测结果为自己设置所述时间资源，并将所设置的时间资源上报给所述施主节点。
(16)根据(12)所述的电子装置，其中，所述节点包括施主节点以及中继节点，并且所述复用方式包括：
在所述中继节点的回传链路的链路质量低于预定阈值的情况下，将用于SSB发送的至少部分时间资源调整为用于SSB接收。
(17)根据(16)所述的电子装置，其中，所述预定阈值是所述施主节点为所述中继节点配置的。
(18)根据(16)所述的电子装置，其中，所述复用方式还包括：
在将所述至少部分时间资源调整为用于SSB接收的情况下，针对所述中继节点的邻近节点，将相应时频资源调整为用于SSB发送。
(19)根据(16)所述的电子装置，其中，所述调整是通过以下方式进行的：
在所述中继节点的回传链路的链路质量低于预定阈值的情况下，由所述中继节点向所述施主节点发出请求；以及
所述施主节点基于所述请求为所述中继节点配置更多的用于SSB接收的时间资源。
(20)根据(1)所述的电子装置，其中，所述参考信号包括同步信号块SSB，并且
所述配置信息包括相邻节点发送用于接入链路的SSB和用于回传链路的SSB的方式。
(21)根据(20)所述的电子装置，其中，所述方式包括：
所述相邻节点通过正交的时间资源发送用于接入链路的SSB和用于回传链路的SSB；或者
所述相邻节点以定向波束发送用于回传链路的SSB。
(22)根据(1)至(21)中任一项所述的电子装置，其中，所述节点包括施主节点以及中继节点，并且所述处理电路还被配置为：
获取跳数信息，所述跳数信息指示所述中继节点距所述施主节点的中继跳数。
(23)根据(22)所述的电子装置，其中，所述跳数信息的获取包括：
基于所述参考信号的资源位置与所述中继跳数之间的预定对应关系来确定发送所述参考信号的中继节点的中继跳数，
其中，所述参考信号包括同步信号块SSB、信道状态信息参考信号CSI-RS信号或系统信息块信号，并且
其中，所述预定对应关系是由所述施主节点通知给所述中继节点的。
(24)根据(22)所述的电子装置，其中，所述跳数信息的获取包括：
从节点发送的主系统信息块、无线资源控制信令或所述参考信号中获取所述跳数信息。
(25)根据(22)所述的电子装置，其中，所述处理电路还被配置为基于以下条件进行回传链路的重选：
当前连接节点和候选连接节点的跳数；以及/或者
当前连接节点和候选连接节点的链路质量。
(26)根据(25)所述的电子装置，其中，通过以下方式进行所述重选：
在候选连接节点的所述条件优于当前连接节点的情况下，确定切换至所述候选连接节点；
根据在给定时间窗内测量的多个候选连接节点的所述条件，选择要切换至的候选连接节点；或者
将给定时间窗内测量的多个候选连接节点的所述条件上报给所述施主节点，并由所述施主节点选择要切换至的候选连接节点。
(27)根据(1)至(21)中任一项所述的电子装置，其中，所述处理电路还被配置为：
基于经由回传链路连接的不同节点的信号间的时间偏差，确定对所述 不同节点中至少一个节点的同步时间的调整。
(28)根据(27)所述的电子装置，其中，所述调整包括：
在经由回传链路连接的上级节点与下级节点的同步信号块SSB之间的偏差超过预定阈值的情况下，调整所述下级节点的同步时间。
(29)根据(28)所述的电子装置，其中，所述处理电路还被配置为：
在所述上级节点与所述下级节点的所述SSB之间的偏差大于预定上限的情况下，针对所述下级节点将所述配置信息确定为减小所述SSB的监听周期或者增加所述SSB的监听位置；以及/或者
在所述上级节点与所述下级节点的所述SSB之间的偏差小于预定下限的情况下，针对所述下级节点将所述配置信息确定为增大所述SSB的监听周期或者减少所述SSB的监听位置。
(30)根据(27)所述的电子装置，其中，所述调整包括：
在第二节点接收到的来自第一节点和第三节点的同步信号块SSB之间的偏差超过预定阈值的情况下，调整所述第三节点的同步时间，其中，所述第一节点、所述第二节点和所述第三节点经由回传链路连接，所述第一节点是所述第二节点的上级节点，所述第二节点是所述第三节点的上级节点。
(31)根据(27)所述的电子装置，其中，所述调整是通过以下方式确定的：
由第一节点向经由回传链路与所述第一节点连接的第二节点发送定时配置；
所述第二节点基于所述定时配置向所述第一节点发送同步维持信号；以及
所述第一节点基于所述定时配置和所述同步维持信号的定时来确定所述第一节点或所述第二节点的同步时间的调整。
(32)一种无线通信方法，包括：
发送或接收配置信息，所述配置信息与用于综合接入回传链路IAB节点的发现过程的参考信号的配置有关。
(33)一种用于无线通信的电子装置，其包括处理电路，所述处理电路被配置为：
获取跳数信息，所述跳数信息指示中继节点距施主节点的中继跳数，
其中，所述施主节点是与核心网有线连接的综合接入回传链路IAB节点，所述中继节点是未与所述核心网有线连接的综合接入回传IAB节点。
(34)根据(33)所述的电子装置，其中，所述跳数信息的获取包括：
基于同步信号块SSB的时间资源位置与中继跳数之间的预定对应关系来确定发送所述SSB的中继节点的中继跳数。
(35)根据(33)所述的电子装置，其中，所述跳数信息的获取包括：
从所述中继节点发送的主系统信息块、无线资源控制信令或用于综合接入回传IAB节点的发现过程的参考信号中获取所述跳数信息。
(36)根据(33)所述的电子装置，其中，所述处理电路还被配置为基于以下条件进行回传链路的重选：
当前连接节点和候选连接节点的跳数；以及/或者
当前连接节点和候选连接节点的链路质量。
(37)根据(36)所述的电子装置，其中，通过以下方式进行所述重选：
在候选连接节点的所述条件优于当前连接节点的情况下，确定切换至所述候选连接节点；
根据在给定时间窗内测量的多个候选连接节点的所述条件，选择要切换至的候选连接节点；或者
将给定时间窗内测量的多个候选连接节点的所述条件上报给所述施主节点，并由所述施主节点选择要切换至的候选连接节点。
(38)一种无线通信方法，包括：
获取跳数信息，所述跳数信息指示中继节点距施主节点的中继跳数，
其中，所述施主节点是与核心网有线连接的综合接入回传链路IAB节点，所述中继节点是未与所述核心网有线连接的综合接入回传IAB节点。
(39)一种用于无线通信的电子装置，其包括处理电路，所述处理电路被配置为：
基于经由回传链路连接的不同节点的信号间的时间偏差，确定对所述不同节点中至少一个节点的同步时间的调整。
(40)根据(39)所述的电子装置，其中，所述调整包括：
在经由回传链路连接的上级节点与下级节点的同步信号块SSB之间的偏差超过预定阈值的情况下，调整所述下级节点的同步时间。
(41)根据(40)所述的电子装置，其中，所述处理电路还被配置为：
在所述上级节点与所述下级节点的所述SSB之间的偏差大于预定上限的情况下，使所述下级节点减小所述SSB的监听周期或者增加所述SSB的监听位置；以及/或者
在所述上级节点与所述下级节点的所述SSB之间的偏差小于预定下限的情况下，使所述下级节点增大所述SSB的监听周期或者减少所述SSB的监听位置。
(42)根据(39)所述的电子装置，其中，所述调整包括：
在第二节点接收到的来自第一节点和第三节点的同步信号块SSB之间的偏差超过预定阈值的情况下，调整所述第三节点的同步时间，其中，所述第一节点、所述第二节点和所述第三节点经由回传链路连接，所述第一节点是所述第二节点的上级节点，所述第二节点是所述第三节点的上级节点；以及/或者
由所述第二节点根据所述偏差调整上行和下行之间的转换间隙,其中所述转换间隙是由施主节点配置或者所述第二节点的上级节点配置的。
(43)根据(39)所述的电子装置，其中，所述调整是通过以下方式确定的：
由第一节点向经由回传链路与所述第一节点连接的第二节点发送定时配置；
所述第二节点基于所述定时配置向所述第一节点发送同步维持信号；
所述第一节点基于所述定时配置和所述同步维持信号的定时来确定所述第一节点或所述第二节点的同步时间的调整。
(44)一种无线通信方法，包括：
基于经由回传链路连接的不同节点的信号间的时间偏差，确定对所述不同节点中至少一个节点的同步时间的调整。
(45)一种计算机可读介质，其包括可执行指令，当所述可执行指令被信息处理设备执行时，使得所述信息处理设备执行根据(32)、(38)、(44)中任一项所述的方法。

Claims (45)

  1. 一种用于无线通信的电子装置，其包括处理电路，所述处理电路被配置为：
    进行控制以发送或接收配置信息，所述配置信息与用于综合接入回传链路IAB节点的发现过程的参考信号的配置有关。
  2. 根据权利要求1所述的电子装置，其中，所述参考信号包括同步信号块SSB，并且
    所述配置信息包括用于接入链路的SSB与用于回传链路的SSB的复用方式。
  3. 根据权利要求2所述的电子装置，其中，所述复用方式包括：
    将用于接入链路的SSB的周期内的部分SSB资源位置分配给用于回传链路的SSB；以及/或者
    增大用于接入链路的SSB的周期，在增加的周期部分中布置用于回传链路的SSB。
  4. 根据权利要求2所述的电子装置，其中，所述复用方式是基于用户设备的接入性能调整的，所述调整包括：
    在所述接入性能降低的情况下，增加用于接入链路的SSB。
  5. 根据权利要求4所述的电子装置，其中，所述调整是在所述用户设备的接入时延超过预定阈值的情况下被触发的。
  6. 根据权利要求2所述的电子装置，其中，所述复用方式包括：
    对用于接入链路的SSB和用于回传链路的SSB分别应用不同的功率级；以及/或者
    将特定SSB资源位置设置为用于接入链路的SSB。
  7. 根据权利要求1所述的电子装置，其中，所述参考信号包括信道状态信息参考信号CSI-RS，并且
    所述配置信息包括用于接入链路的CSI-RS与用于回传链路的CSI-RS的复用方式。
  8. 根据权利要求7所述的电子装置，其中，所述复用方式包括：
    以定向波束发送用于回传链路的CSI-RS，并且用于接入链路的CSI-RS与用于回传链路的CSI-RS复用时频资源。
  9. 根据权利要求8所述的电子装置，其中，所述节点包括施主节点以及中继节点，并且所述复用方式是通过以下方式确定的：
    所述施主节点基于所述中继节点的物理位置信息以及所述中继节点间的连接关系，为所述中继节点配置定向波束的参数信息；
    所述施主节点基于所述中继节点检测并上报的关于所述中继节点周围的候选节点的方向信息，为所述中继节点和所述候选节点配置定向波束的参数信息；或者
    所述中继节点基于其检测的关于周围的候选节点的方向信息设置定向波束的参数信息，并将所设置的参数信息上报给所述施主节点。
  10. 根据权利要求9所述的电子装置，其中，所述中继节点的物理位置信息以及所述中继节点间的连接关系是由所述中继节点上报给所述施主节点的。
  11. 根据权利要求7所述的电子装置，其中，所述复用方式包括：
    以全向的方式发送用于回传链路的CSI-RS，并且用于接入链路的CSI-RS与用于回传链路的CSI-RS采用正交的时频资源。
  12. 根据权利要求11所述的电子装置，其中，所述节点包括施主节点以及中继节点，并且所述复用方式是通过以下方式确定的：
    所述施主节点基于所述中继节点的物理位置信息以及所述中继节点间的连接关系，为所述中继节点配置所述时频资源；或者
    所述中继节点为其下级节点配置所述时频资源，并将所配置的时频资源上报给所述施主节点。
  13. 根据权利要求1所述的电子装置，其中，所述参考信号包括同步信号块SSB，并且
    所述配置信息包括针对SSB的发送和/或接收的复用方式。
  14. 根据权利要求13所述的电子装置，其中，所述复用方式包括：
    相邻接点的SSB的发送的时间资源正交。
  15. 根据权利要求14所述的电子装置，其中，所述节点包括施主节点以及中继节点，并且所述复用方式是通过以下方式确定的：
    所述施主节点基于所述中继节点的物理位置信息以及所述中继节点间的 连接关系，为所述中继节点配置SSB的发送的时间资源；
    所述中继节点为其下级节点配置所述时间资源，并将所配置的时间资源上报给所述施主节点；或者
    所述中继节点基于其所在跳数检测周围节点发送的SSB，根据检测结果为自己设置所述时间资源，并将所设置的时间资源上报给所述施主节点。
  16. 根据权利要求12所述的电子装置，其中，所述节点包括施主节点以及中继节点，并且所述复用方式包括：
    在所述中继节点的回传链路的链路质量低于预定阈值的情况下，将用于SSB发送的至少部分时间资源调整为用于SSB接收。
  17. 根据权利要求16所述的电子装置，其中，所述预定阈值是所述施主节点为所述中继节点配置的。
  18. 根据权利要求16所述的电子装置，其中，所述复用方式还包括：
    在将所述至少部分时间资源调整为用于SSB接收的情况下，针对所述中继节点的邻近节点，将相应时频资源调整为用于SSB发送。
  19. 根据权利要求16所述的电子装置，其中，所述调整是通过以下方式进行的：
    在所述中继节点的回传链路的链路质量低于预定阈值的情况下，由所述中继节点向所述施主节点发出请求；以及
    所述施主节点基于所述请求为所述中继节点配置更多的用于SSB接收的时间资源。
  20. 根据权利要求1所述的电子装置，其中，所述参考信号包括同步信号块SSB，并且
    所述配置信息包括相邻节点发送用于接入链路的SSB和用于回传链路的SSB的方式。
  21. 根据权利要求20所述的电子装置，其中，所述方式包括：
    所述相邻节点通过正交的时间资源发送用于接入链路的SSB和用于回传链路的SSB；或者
    所述相邻节点以定向波束发送用于回传链路的SSB。
  22. 根据权利要求1至21中任一项所述的电子装置，其中，所述节点包括施主节点以及中继节点，并且所述处理电路还被配置为：
    获取跳数信息，所述跳数信息指示所述中继节点距所述施主节点的中继跳数。
  23. 根据权利要求22所述的电子装置，其中，所述跳数信息的获取包括：
    基于所述参考信号的资源位置与所述中继跳数之间的预定对应关系来确定发送所述参考信号的中继节点的中继跳数，
    其中，所述参考信号包括同步信号块SSB、信道状态信息参考信号CSI-RS信号或系统信息块信号，并且
    其中，所述预定对应关系是由所述施主节点通知给所述中继节点的。
  24. 根据权利要求22所述的电子装置，其中，所述跳数信息的获取包括：
    从节点发送的主系统信息块、无线资源控制信令或所述参考信号中获取所述跳数信息。
  25. 根据权利要求22所述的电子装置，其中，所述处理电路还被配置为基于以下条件进行回传链路的重选：
    当前连接节点和候选连接节点的跳数；以及/或者
    当前连接节点和候选连接节点的链路质量。
  26. 根据权利要求25所述的电子装置，其中，通过以下方式进行所述重选：
    在候选连接节点的所述条件优于当前连接节点的情况下，确定切换至所述候选连接节点；
    根据在给定时间窗内测量的多个候选连接节点的所述条件，选择要切换至的候选连接节点；或者
    将给定时间窗内测量的多个候选连接节点的所述条件上报给所述施主节点，并由所述施主节点选择要切换至的候选连接节点。
  27. 根据权利要求1至21中任一项所述的电子装置，其中，所述处理电路还被配置为：
    基于经由回传链路连接的不同节点的信号间的时间偏差，确定对所述不同节点中至少一个节点的同步时间的调整。
  28. 根据权利要求27所述的电子装置，其中，所述调整包括：
    在经由回传链路连接的上级节点与下级节点的同步信号块SSB之间的偏差超过预定阈值的情况下，调整所述下级节点的同步时间。
  29. 根据权利要求28所述的电子装置，其中，所述处理电路还被配置为：
    在所述上级节点与所述下级节点的所述SSB之间的偏差大于预定上限的情况下，针对所述下级节点将所述配置信息确定为减小所述SSB的监听周期或者增加所述SSB的监听位置；以及/或者
    在所述上级节点与所述下级节点的所述SSB之间的偏差小于预定下限的情况下，针对所述下级节点将所述配置信息确定为增大所述SSB的监听周期或者减少所述SSB的监听位置。
  30. 根据权利要求27所述的电子装置，其中，所述调整包括：
    在第二节点接收到的来自第一节点和第三节点的同步信号块SSB之间的偏差超过预定阈值的情况下，调整所述第三节点的同步时间，其中，所述第一节点、所述第二节点和所述第三节点经由回传链路连接，所述第一节点是所述第二节点的上级节点，所述第二节点是所述第三节点的上级节点。
  31. 根据权利要求27所述的电子装置，其中，所述调整是通过以下方式确定的：
    由第一节点向经由回传链路与所述第一节点连接的第二节点发送定时配置；
    所述第二节点基于所述定时配置向所述第一节点发送同步维持信号；以及
    所述第一节点基于所述定时配置和所述同步维持信号的定时来确定所述第一节点或所述第二节点的同步时间的调整。
  32. 一种无线通信方法，包括：
    发送或接收配置信息，所述配置信息与用于综合接入回传链路IAB节点的发现过程的参考信号的配置有关。
  33. 一种用于无线通信的电子装置，其包括处理电路，所述处理电路被配置为：
    获取跳数信息，所述跳数信息指示中继节点距施主节点的中继跳数，
    其中，所述施主节点是与核心网有线连接的综合接入回传链路IAB节点，所述中继节点是未与所述核心网有线连接的综合接入回传IAB节点。
  34. 根据权利要求33所述的电子装置，其中，所述跳数信息的获取包括：
    基于同步信号块SSB的时间资源位置与中继跳数之间的预定对应关系来确定发送所述SSB的中继节点的中继跳数。
  35. 根据权利要求33所述的电子装置，其中，所述跳数信息的获取包括：
    从所述中继节点发送的主系统信息块、无线资源控制信令或用于综合接入回传IAB节点的发现过程的参考信号中获取所述跳数信息。
  36. 根据权利要求33所述的电子装置，其中，所述处理电路还被配置为基于以下条件进行回传链路的重选：
    当前连接节点和候选连接节点的跳数；以及/或者
    当前连接节点和候选连接节点的链路质量。
  37. 根据权利要求36所述的电子装置，其中，通过以下方式进行所述重选：
    在候选连接节点的所述条件优于当前连接节点的情况下，确定切换至所述候选连接节点；
    根据在给定时间窗内测量的多个候选连接节点的所述条件，选择要切换至的候选连接节点；或者
    将给定时间窗内测量的多个候选连接节点的所述条件上报给所述施主节点，并由所述施主节点选择要切换至的候选连接节点。
  38. 一种无线通信方法，包括：
    获取跳数信息，所述跳数信息指示中继节点距施主节点的中继跳数，
    其中，所述施主节点是与核心网有线连接的综合接入回传链路IAB节点，所述中继节点是未与所述核心网有线连接的综合接入回传IAB节点。
  39. 一种用于无线通信的电子装置，其包括处理电路，所述处理电路被配置为：
    基于经由回传链路连接的不同节点的信号间的时间偏差，确定对所述不同节点中至少一个节点的同步时间的调整。
  40. 根据权利要求39所述的电子装置，其中，所述调整包括：
    在经由回传链路连接的上级节点与下级节点的同步信号块SSB之间的偏差超过预定阈值的情况下，调整所述下级节点的同步时间。
  41. 根据权利要求40所述的电子装置，其中，所述处理电路还被配置为：
    在所述上级节点与所述下级节点的所述SSB之间的偏差大于预定上限的情况下，使所述下级节点减小所述SSB的监听周期或者增加所述SSB的监听位置；以及/或者
    在所述上级节点与所述下级节点的所述SSB之间的偏差小于预定下限的情况下，使所述下级节点增大所述SSB的监听周期或者减少所述SSB的监听位置。
  42. 根据权利要求39所述的电子装置，其中，所述调整包括：
    在第二节点接收到的来自第一节点和第三节点的同步信号块SSB之间的偏差超过预定阈值的情况下，调整所述第三节点的同步时间，其中，所述第一节点、所述第二节点和所述第三节点经由回传链路连接，所述第一节点是所述第二节点的上级节点，所述第二节点是所述第三节点的上级节点；以及/或者
    由所述第二节点根据所述偏差调整上行和下行之间的转换间隙,其中所述转换间隙是由施主节点配置或者所述第二节点的上级节点配置的。
  43. 根据权利要求39所述的电子装置，其中，所述调整是通过以下方式确定的：
    由第一节点向经由回传链路与所述第一节点连接的第二节点发送定时配置；
    所述第二节点基于所述定时配置向所述第一节点发送同步维持信号；
    所述第一节点基于所述定时配置和所述同步维持信号的定时来确定所述第一节点或所述第二节点的同步时间的调整。
  44. 一种无线通信方法，包括：
    基于经由回传链路连接的不同节点的信号间的时间偏差，确定对所述不同节点中至少一个节点的同步时间的调整。
  45. 一种计算机可读介质，其包括可执行指令，当所述可执行指令被 信息处理设备执行时，使得所述信息处理设备执行根据权利要求32、38、44中任一项所述的方法。
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