WO2023150968A1 - 收发信号的方法、装置和通信系统 - Google Patents

收发信号的方法、装置和通信系统 Download PDF

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Publication number
WO2023150968A1
WO2023150968A1 PCT/CN2022/075847 CN2022075847W WO2023150968A1 WO 2023150968 A1 WO2023150968 A1 WO 2023150968A1 CN 2022075847 W CN2022075847 W CN 2022075847W WO 2023150968 A1 WO2023150968 A1 WO 2023150968A1
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network node
rlf
signaling
iab
node
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PCT/CN2022/075847
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English (en)
French (fr)
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易粟
张磊
王昕�
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富士通株式会社
易粟
张磊
王昕�
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Priority to PCT/CN2022/075847 priority Critical patent/WO2023150968A1/zh
Publication of WO2023150968A1 publication Critical patent/WO2023150968A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements

Definitions

  • the embodiment of the present application relates to the technical field of communications.
  • IAB integrated access and backhaul
  • NG-RAN next generation radio access network
  • IAB-node The integrated access and backhaul node
  • NR New Radio
  • IAB-donor represents a network device (eg, gNB) that supports the IAB function.
  • IAB-node can connect to an IAB host (IAB-donor) through one or more hops. These multi-hop connections form a directed acyclic graph (DAG, Directed Acyclic Graph) topology with the IAB host as the root node.
  • DAG directed acyclic graph
  • the IAB host is responsible for performing centralized resource management, topology management, and routing management in the IAB network topology.
  • IAB-node supports the function of gNB-DU (distributed unit, distributed unit). IAB-node DU is also called IAB-DU. The end point of the NR access interface is also the end point of the F1 protocol to the gNB-CU (central unit, central unit) on the IAB-donor.
  • the IAB-DU can serve normal UEs and IAB sub-nodes.
  • the IAB-DU implements the network-side device function, connects to the downstream child IAB-node, provides NR air interface access to the UE and the downstream child IAB-node, and establishes an F1 connection with the IAB donor-CU.
  • IAB-node In addition to the gNB-DU function, IAB-node also supports some UE functions, called IAB-MT (Mobile Termination), IAB-MT includes functions such as physical layer, layer 2, RRC and NAS to connect to another IAB-node Or the gNB-DU of the IAB-donor, connected to the gNB-CU on the IAB-donor and connected to the core network. IAB-MT can support functions such as UE physical layer, access (access stratum, AS), radio resource control (radio resource control, RRC) layer and non-access (non-access stratum, NAS) layer, and can be connected to the IAB parent node.
  • IAB-MT Mobile Termination
  • IAB-MT Mobile Termination
  • IAB-MT Mobile Termination
  • IAB-MT includes functions such as physical layer, layer 2, RRC and NAS to connect to another IAB-node Or the gNB-DU of the IAB-donor, connected to the gNB-CU on the IAB-
  • the IAB-donor is the termination node on the network side, and the IAB-donor provides network access for the IAB-MT or UE through the backhaul or access link.
  • IAB-donor is further divided into IAB-donor-CU (central unit) and IAB-donor-DU.
  • IAB-DU and IAB-donor-CU are connected through F1 interface.
  • the gNB and the IAB-donor-CU are connected through the Xn interface.
  • BAP Backhaul Adaptation Protocol
  • RLC radio link control
  • FIG. 1 is a schematic diagram of the IAB topology.
  • IAB-node100 comprises IAB-MT functional unit 101 and IAB-DU functional unit 102, and the adjacent node on the interface of IAB-DU functional unit 102 is called child node (child node), as shown in Fig. 1, the child nodes 201, 202, 203, the IAB-DU functional unit 102 and the child nodes 201, 202, 203 can communicate through the air interface (Uu); the IAB-MT functional unit 101
  • the adjacent node on the interface is called parent node (parent node), as shown in Fig. 1 parent node 301,302, can pass air interface (Uu) to communicate.
  • IAB-donor (not shown) performs centralized resource, topology and routing management for the IAB topology 10 .
  • the IAB node In a multi-hop scenario, in order to realize the relay and forwarding of data packets, the IAB node needs to determine the target node where the data packet arrives, and then determine the next hop node corresponding to the target node according to the routing table and send it.
  • the donor-CU configures each uplink F1-U Tunnel, non-UE associated (Non-UE associated) F1AP message, and user equipment associated (UE-associated) F1AP message initiated from the IAB node for the IAB node through F1AP signaling , Non-F1 Traffic (Non-F1Traffic) to the mapping of the BAP routing identifier.
  • the IAB node determines the BAP routing identifiers corresponding to different types of uplink IP packets initiated from the IAB node according to the routing identifier mapping information, and encapsulates the BAP subheader containing the BAP routing identifier information for these uplink IP packets.
  • Donor-CU configures the mapping of different types of downlink data packets to BAP routing identifiers for donor-DU through F1AP signaling.
  • the Donor-DU determines the BAP routing identifier corresponding to the received downlink IP packets according to the routing identifier mapping information, and encapsulates the downlink BAP subheader containing the BAP routing identifier for these downlink IP packets.
  • the BAP routing identifier includes the destination BAP address and the path identity (path identity) from the IAB node to the donor-DU.
  • the BAP address is also called DESTINATION in the BAP header.
  • Each IAB node and donor-DU are configured with a BAP address.
  • F1-AP messages encapsulated into Stream Control Transmission Protocol/IP (SCTP/IP) or F1-C related SCTP/IP data packets can be Transfer through the BAP sublayer, or transfer through the Signaling Radio Bearer (SRB) between the IAB node and the corresponding non-F1-termination (non-F1-termination) node.
  • SRB Signaling Radio Bearer
  • the F1-C or F1-C-related data is transmitted through SRB to select different paths for F1-U and F1-C, that is, the control plane-user plane (control plane-user plane, CP- UP) separation.
  • the purpose is to better ensure the transmission of the control plane, and select a shorter path or a link with better wireless channel conditions for the control plane, such as selecting the link where FR1 (frequency range 1) is located.
  • Figure 2 is a schematic diagram of achieving CP-UP separation in two NR-DC scenarios.
  • Scenario 1 IAB node 1 (dual connection node in Figure 2 a)) and IAB-donor 2 (ie, F1-termination node (F1-termination node), secondary node in Figure 2 a)) access through NR
  • the link exchanges F1-AP messages encapsulated into SCTP/IP or F1-C related SCTP/IP data packets via the master node (non-F1 terminal node); through the backhaul link and SN (secondary node, secondary node ) to exchange F1-U traffic.
  • SRB2 is used to transmit F1-AP messages encapsulated into SCTP/IP or F1-C related SCTP/IP packets between IAB-MT and MN (master node, master node).
  • F1-AP messages encapsulated into SCTP/IP or F1-C related SCTP/IP data packets are transferred between the MN and the SN through XnAP as a container.
  • the master node (MN) is the M-NG-RAN node.
  • IAB node 1 and MN (F1 termination node, IAB-donor in Figure 2 b) 2) exchange F1 encapsulated into SCTP/IP via SN (non-F1 termination node) through NR access link - AP messages or F1-C related SCTP/IP data packets; F1-U traffic is exchanged with the MN through the backhaul link.
  • the split (split) SRB2 is used to transmit F1-AP messages encapsulated into SCTP/IP or F1-C related SCTP/IP data packets between the IAB-MT and the SN.
  • F1-AP messages encapsulated into SCTP/IP or F1-C related SCTP/IP data packets are transferred between SN and MN through XnAP as a container.
  • the secondary node (SN) is the S-NG-RAN node.
  • F1-AP messages encapsulated into SCTP/IP or F1-C related (SCTP/)IP packets can be passed through the BAP sublayer or SRB, but the simultaneous use of both on the same parent link is not supported. way. If RRC configures a BH RLC channel for transmitting F1-C traffic in the cell group indicated for F1-C traffic transmission, the F1-AP message encapsulated into SCTP/IP or F1-C related (SCTP/ ) IP packets are passed through the BAP sublayer.
  • the split SRB refers to the SRB between the MN and the terminal device (for example, UE) and the MCG and the SCG both have RLC bearer in the multi-radio dual connectivity (Multi-Radio Dual Connectivity, MR-DC).
  • the downlink transmission path depends on the network implementation; for the uplink, the UE is configured to use the MCG path or perform duplicate transmission on the MCG and SCG through the RRC signaling of the MN.
  • the F1-AP message encapsulated into SCTP/IP or the F1-C related (SCTP/ ) IP packets can be transmitted between IAB-donor and IAB nodes through E-UTRA (Evolved-UMTS Terrestrial Radio Access), if configured by IAB-donor.
  • SRB2 is used to transmit F1-AP messages encapsulated into SCTP/IP or F1-C related SCTP/IP data packets between IAB-MT and MN.
  • These F1-AP messages encapsulated into SCTP/IP or F1-C related SCTP/IP data packets are transmitted between the MN and the SN through the X2-AP as a container.
  • FIG. 3 is a schematic diagram of F1-C delivery via E-UTRA to achieve CP-UP separation.
  • the scenario shown in FIG. 3 is similar to the scenario shown in a) of FIG. 2, the difference is that in FIG. 3, the master node (MN) is the LTE master base station (MeNB) and the master node uses the interface corresponding to the MeNB, for example, IAB-node 1 communicates with MeNB through the LTE Uu interface, and IAB-donor 2 communicates with MeNB through the X2 interface.
  • MN the master node
  • MeNB LTE master base station
  • IAB-donor 2 communicates with MeNB through the X2 interface.
  • the inventors of the present application found that, in the several CP-UP separation scenarios shown in Fig. 2 and Fig. 3 above, if a radio link failure (RLF, radio link failure), because F1-C exchanges information with IAB-donor 2 through the access link instead of the backhaul link, so the local re-routing (local re-routing) method of the BAP layer is not applicable, and the IAB node and The F1-C signaling between IAB-donors cannot be exchanged successfully.
  • RLF radio link failure
  • the F1-C signaling of the dual-connectivity IAB node 1 passes through the MN (as shown in Fig. 2 a) or SN (Fig. 2 b)
  • the access link shown in ) is passed by the SRB; in some cases, there may be an intermediate IAB node between the IAB node and the MN or SN.
  • the dual-connection IAB node 1 there may be other IAB nodes between the dual-connection IAB node 1 and the MN, that is, a parent node (not shown);
  • the BH RLC channel used to transmit F1-U, that is, the dual-connection IAB node can also have a backhaul link on the MCG link, this configuration can be used in a topology redundant network; if the parent node occurs RLF is established and the child node sends a return wireless link failure detection indication (BH RLF detection indication), then the dual-connection node will receive the BH RLF detection indication from the MCG link.
  • BH RLF detection indication return wireless link failure detection indication
  • the uplink BH data that is, the uplink data passing through the BAP sublayer
  • the uplink BH data can be locally rerouted to another parent node backhaul link.
  • the F1-C message in the CP-UP separation scenario is transmitted in the RRC message through the SRB, local rerouting cannot be used. Since the donor-CU is configured that F1-C needs to pass through the MCG link, this will cause the F1-C signaling transmission of the dual-connection IAB node to fail.
  • the scenario in b) of FIG. 2 also has a similar problem, which will not be repeated here.
  • Embodiments of the present application provide a method, device, and communication system for sending and receiving signals.
  • F1 control plane F1-C
  • the network node switches the transmission path of F1-C signaling , thus, the smooth transmission of the F1-C signaling can be guaranteed.
  • a device for sending and receiving signals is provided, which is applied to a first network node, and the device includes:
  • the first processing unit detects that a radio link failure (RLF) has occurred in the transmission path of the F1-C signaling or has received a backhaul radio link failure (BH RLF) detection indication; and
  • RLF radio link failure
  • BH RLF backhaul radio link failure
  • a first switching unit which enables the first network node to switch the transmission path of the F1-C signaling.
  • a device for sending and receiving signals which is applied to a first network node, and the device includes:
  • the second switching unit is configured to enable the first network to complete the restoration of the radio link failure (RLF) or when the first network node receives a backhaul radio link failure (BH RLF) restoration indication.
  • the node switches the transmission path of the F1-C signaling.
  • a method for sending and receiving signals is provided, which is applied to a first network node, and the method includes:
  • the first network node detects that a radio link failure (RLF) has occurred on the transmission path of the F1-C signaling or has received a backhaul radio link failure (BH RLF) detection indication; and
  • RLF radio link failure
  • BH RLF backhaul radio link failure
  • the first network node switches the transmission path of the F1-C signaling.
  • a method for sending and receiving signals is provided, which is applied to a first network node, and the method includes:
  • the radio link failure (RLF) recovery is completed or the first network node has received a backhaul radio link failure (BH RLF) recovery indication;
  • the first network node switches the transmission path of the F1-C signaling.
  • the beneficial effect of the embodiment of the present application is that: when a wireless link failure occurs in the transmission path of the F1 control plane (F1-C) signaling, the network node switches the transmission path of the F1-C signaling, thereby ensuring that the F1-C Smooth transmission of signaling.
  • F1-C F1 control plane
  • Figure 1 is a schematic diagram of the IAB topology
  • Figure 2 is a schematic diagram of achieving CP-UP separation in two NR-DC scenarios
  • Figure 3 is a schematic diagram of F1-C transfer through E-UTRA to achieve CP-UP separation
  • Fig. 4 is a schematic diagram of a method for sending and receiving signals according to an embodiment of the first aspect
  • Fig. 5 is a schematic diagram of a method for sending and receiving signals according to an embodiment of the second aspect
  • Fig. 6 is a schematic diagram of the signals of the device for transmitting and receiving signals according to the embodiment of the third aspect
  • Fig. 7 is a schematic diagram of the signals of the device for transmitting and receiving signals according to the embodiment of the fourth aspect
  • Fig. 8 is a schematic structural diagram of the first network node in the embodiment of the fifth aspect.
  • the terms “first”, “second”, etc. are used to distinguish different elements from the title, but do not indicate the spatial arrangement or time order of these elements, and these elements should not be referred to by these terms restricted.
  • the term “and/or” includes any and all combinations of one or more of the associated listed items.
  • the terms “comprising”, “including”, “having” and the like refer to the presence of stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.
  • the term “communication network” or “wireless communication network” may refer to a network conforming to any of the following communication standards, such as New Radio (NR, New Radio), Long Term Evolution (LTE, Long Term Evolution), Enhanced Long-term evolution (LTE-A, LTE-Advanced), wideband code division multiple access (WCDMA, Wideband Code Division Multiple Access), high-speed packet access (HSPA, High-Speed Packet Access), etc.
  • NR New Radio
  • New Radio Long Term Evolution
  • LTE-A Long-term evolution
  • LTE-A Long-term evolution
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • the communication between devices in the communication system can be carried out according to any stage of communication protocols, such as but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G , New Radio (NR, New Radio), etc., and/or other communication protocols that are currently known or will be developed in the future.
  • Network device refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device.
  • Network equipment may include but not limited to the following equipment: integrated access and backhaul node (IAB-node), relay (relay), base station (BS, Base Station), access point (AP, Access Point), sending and receiving Point (TRP, Transmission Reception Point), broadcast transmitter, mobile management entity (MME, Mobile Management Entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller) etc.
  • IAB-node integrated access and backhaul node
  • relay relay
  • base station BS, Base Station
  • AP Access Point
  • TRP Transmission Reception Point
  • broadcast transmitter mobile management entity
  • MME Mobile Management Entity
  • gateway server
  • RNC Radio Network Controller
  • BSC Base Station Controller
  • the base station may include but not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), and 5G base station (gNB), etc., and may also include Remote Radio Head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low-power nodes (such as femeto, pico, etc.).
  • Node B Node B
  • eNodeB or eNB evolved Node B
  • gNB 5G base station
  • RRH Remote Radio Head
  • RRU Remote Radio Unit
  • relay relay
  • low-power nodes such as femeto, pico, etc.
  • base station may include some or all of their functions, each base station may provide communication coverage for a particular geographic area.
  • the term "cell” can refer to a base station and/or its coverage area depending on the context in which the term is used.
  • the term "User Equipment” (UE, User Equipment) or “terminal equipment” (TE, Terminal Equipment or Terminal Device), for example, refers to a device that accesses a communication network through a network device and receives network services.
  • a terminal device may be fixed or mobile, and may also be called a mobile station (MS, Mobile Station), a terminal, a subscriber station (SS, Subscriber Station), an access terminal (AT, Access Terminal), a station, and the like.
  • the terminal equipment may include but not limited to the following equipment: Cellular Phone (Cellular Phone), Personal Digital Assistant (PDA, Personal Digital Assistant), wireless modem, wireless communication equipment, handheld equipment, machine type communication equipment, laptop computer, Cordless phones, smartphones, smart watches, digital cameras, and more.
  • Cellular Phone Cellular Phone
  • PDA Personal Digital Assistant
  • wireless modem wireless communication equipment
  • handheld equipment machine type communication equipment
  • laptop computer Cordless phones
  • Cordless phones smartphones, smart watches, digital cameras, and more.
  • the terminal device can also be a machine or device for monitoring or measurement, such as but not limited to: a machine type communication (MTC, Machine Type Communication) terminal, Vehicle communication terminal, device to device (D2D, Device to Device) terminal, machine to machine (M2M, Machine to Machine) terminal, etc.
  • MTC Machine Type Communication
  • Vehicle communication terminal device to device (D2D, Device to Device) terminal
  • M2M Machine to Machine
  • network side or “network device side” refers to a side of the network, which may be a certain base station, or may include one or more network devices as above.
  • user side or “terminal side” or “terminal device side” refers to a side of a user or a terminal, which may be a certain UE, or may include one or more terminal devices as above.
  • the high-level signaling may be, for example, radio resource control (RRC) signaling; for example, it is called an RRC message (RRC message), for example including MIB, system information (system information), and a dedicated RRC message; or It is called RRC IE (RRC information element).
  • RRC radio resource control
  • the high-level signaling may also be, for example, F1-C signaling, or the F1AP protocol. But the present application is not limited thereto.
  • the first network node is, for example, an IAB node (IAB-node).
  • IAB-node IAB node
  • This application will take a multi-hop IAB network deployment scenario as an example to describe each embodiment, wherein multiple UEs are connected through multiple
  • the jumping IAB node is connected to the IAB-donor, and finally connected to the network, such as a 5G network.
  • the embodiments of the present application may not be limited to the above scenarios, for example, the first network node may also be another type of network node.
  • the scenarios of the embodiments are not limited to the illustrated dual connectivity scenarios, nor are they limited to the scenario of CP-UP separation.
  • the embodiment of the first aspect of the present application provides a method for sending and receiving signals.
  • the method is applied to a first network node.
  • Fig. 4 is a schematic diagram of a method for sending and receiving signals according to an embodiment of the first aspect. As shown in Fig. 4, the method includes:
  • the first network node detects that a radio link failure (RLF) has occurred on the transmission path of the F1-C signaling or has received a backhaul radio link failure (BH RLF) detection indication; and
  • RLF radio link failure
  • BH RLF backhaul radio link failure
  • the first network node switches the transmission path of the F1-C signaling.
  • the network node when a radio link failure occurs in the transmission path of the F1-C signaling, switches the transmission path of the F1-C signaling, thereby ensuring smooth transmission of the F1-C signaling.
  • the first network node may be an IAB-node, for example, a) in FIG. 2 , b) in FIG. 2 or IAB-node 1 in FIG. 3 .
  • the embodiments of the first aspect will be described for different scenarios.
  • the first network node is a network node of New Radio Interface Dual Connectivity (NR-DC), for example, an IAB node of NR-DC.
  • NR-DC New Radio Interface Dual Connectivity
  • the first network node detects that a master cell group (MCG) RLF has occurred, or the first network node receives the BH RLF detection indication from the MCG.
  • MCG master cell group
  • the first network node switches the transmission path of the F1-C signaling, including: the first network node transmits the F1-C signaling through a Backhaul Adaptation Protocol (BAP) layer via a Secondary Cell Group (SCG). That is, the first network node transmits F1-C signaling using a BH RLC channel configured for F1-C traffic on the SCG link.
  • BAP Backhaul Adaptation Protocol
  • SCG Secondary Cell Group
  • the first network node selects or modifies a first parameter value configured for the first network node via RRC signaling, and the first parameter value is used to specify a transmission path of the F1-C signaling.
  • the first parameter is, for example, f1c-TransferPathNRDC.
  • the first parameter f1c-TransferPathNRDC may be configured for the IAB node in the RRC signaling. This parameter specifies the delivery path that the IAB-MT of the IAB node of the NR-DC should use when delivering the F1-C data packet to the IAB-donor-CU.
  • IAB-MT can only use MCG for F1-C transfer. If the IAB-MT is configured as "scg” (ie, the parameter value is scg), the IAB-MT can only use SCG for F1-C transfer. If the IAB-MT is configured as "both", the IAB-MT will select MCG or SCG for F1-C transfer.
  • the first network node of the NR-DC (for example, the IAB-node 1 of Figure 2 a) can use the IAB-donor 2 via the SCG (for example, Figure 2 a) to transmit the F1-C (F1 -C over BAP), regardless of the f1c-TransferPathNRDC configuration, i.e., use the BH RLC channel configured for F1-C traffic on the SCG link.
  • IAB-node 1 independently selects the f1c-TransferPathNRDC configuration, that is, IAB-node 1 modifies the parameter value of f1c-TransferPathNRDC in the network configuration to scg.
  • the receiving part of the BAP entity needs to indicate that the upper layer has received the BH RLF detection indication from a certain ingress link, the The ingress link is the ingress link that receives the BAP control PDU.
  • enhancements to the BAP layer standard can be made in TS 38.340.
  • An example of a modification to the standard is shown in Table 1 below.
  • the first network node is a network node of EN-DC, eg, an IAB node of NR-DC.
  • a first network node detects that a primary cell group (MCG) RLF has occurred.
  • MCG primary cell group
  • the first network node switches the transmission path of the F1-C signaling, including: the first network node transmits the F1-C signaling through a Backhaul Adaptation Protocol (BAP) layer via a Secondary Cell Group (SCG).
  • BAP Backhaul Adaptation Protocol
  • SCG Secondary Cell Group
  • the first network node selects or modifies a second parameter value configured for the first network node via RRC signaling, and the second parameter value is used to specify the transmission path of the F1-C signaling, specifically, the second parameter indicates In the case of long term evolution (lte), the second parameter is set to indicate new radio (nr).
  • Lte long term evolution
  • nr new radio
  • the second parameter is, for example, f1c-TransferPath.
  • the second parameter f1c-TransferPath may be configured for the IAB node in the RRC signaling.
  • the second parameter specifies the delivery path that the IAB-MT of the EN-DC should use when delivering the F1-C data packet to the IAB-donor-CU.
  • IAB-MT can only use LTE link for F1-C transfer. If the IAB-MT is configured as "nr”, the IAB-MT can only use the NR link for F1-C transfer. If the IAB-MT is configured as "both”, the IAB-MT will select the LTE or NR link for F1-C transfer. If not configured, the IAB node uses the NR link as the default configuration.
  • the first network node of the EN-DC (for example, IAB-node 1 of Figure 3) the IAB node of the EN-DC can use the IAB-donor 2 via the SCG (for example, a of Figure 2) to transmit the F1- C(F1-C over BAP), regardless of the f1c-TransferPath configuration. That is, use the BH RLC channel configured for F1-C traffic on the SCG link.
  • the IAB-node independently selects the f1c-TransferPath configuration, that is, the IAB-node modifies the f1c-TransferPath parameter value of the network configuration to nr.
  • enhancements to the RRC standard can be made in TS 38.331.
  • An example of a modification to the standard is shown in Table 2 below.
  • the first network node is a network node of New Radio Interface Dual Connectivity (NR-DC), for example, an IAB node of NR-DC.
  • NR-DC New Radio Interface Dual Connectivity
  • the first network node detects that secondary cell group (SCG) RLF has occurred, or the first network node receives the BH RLF detection indication from the SCG.
  • SCG secondary cell group
  • the first network node switches the transmission path of the F1-C signaling, including: the first network node transmits the F1-C signaling through a Backhaul Adaptation Protocol (BAP) layer via a Master Cell Group (MCG). That is, the first network node uses the BH RLC channel configured for F1-C traffic on the MCG link to transmit F1-C signaling (corresponding to the following method 1), or the first network node passes the RRC message via the primary cell group Carry F1-C signaling (corresponding to method 2 below).
  • BAP Backhaul Adaptation Protocol
  • MCG Master Cell Group
  • the first network node selects or modifies a first parameter value configured for the first network node via RRC signaling, where the first parameter is, for example, f1c-TransferPathNRDC.
  • the first network node may set the value of the first parameter to indicate the MCG.
  • the first network node of NR-DC (for example, the IAB-node 1 of Fig. 2 b) can use the IAB-donor 2) via the MCG (for example, Fig. 2 b) to transmit the F1-C (F1 -C over BAP), regardless of the f1c-TransferPathNRDC configuration, i.e., use the BH RLC channel configured for F1-C traffic on the MCG link.
  • IAB-node 1 independently selects the f1c-TransferPathNRDC configuration, that is, IAB-node 1 modifies the parameter value of f1c-TransferPathNRDC in the network configuration to mcg.
  • the receiving part of the BAP entity needs to indicate that the upper layer has received the BH RLF detection indication from a certain ingress link, the The ingress link is the ingress link that receives the BAP control PDU.
  • enhancements to the BAP layer standard can be made in TS 38.340.
  • An example of modification to the standard can be shown in Table 1 above, for example.
  • Method 1 Similar to the embodiment for scenario 1 of a) in FIG. 2 , that is, the first network node autonomously selects the f1c-TransferPathNRDC configuration, that is, the IAB-node modifies the f1c-TransferPathNRDC parameter value of the network configuration.
  • Method 2 Modify the value of the third parameter of the split SRB2 configured via RRC, where the third parameter is, for example, primaryPath.
  • the information element (IE) RadioBearerConfig in the RRC message is used to add, modify or release signaling and/or data radio bearers.
  • this IE carries Packet Data Convergence Protocol (PDCP) parameters and the like.
  • the IE PDCP-Config about PDCP parameters contains primaryPath (ie, the third parameter), which is used to indicate the cell group ID and logical channel of the primary RLC entity used for uplink data transmission when this PDCP entity is associated with more than one RLC entity Identification (Logical Channel Identification, LCID).
  • the network device uses logical channels of different cell groups to indicate the cell groups of the split bearers.
  • F1-C is carried by the split SRB2, and the network device configures the primaryPath to point to the SCG. Therefore, the primaryPath configuration can be independently selected by the IAB node, that is, the IAB modifies the primaryPath parameter value of the network configuration.
  • SRB2 is configured as a split SRB, and the packet data convergence protocol repetition (pdcp-Dupplication) is not configured, SRB2
  • the primaryPath in the PDCP entity points to the SCG, then set the primaryPath to point to the MCG.
  • Enhancements to the RRC standard can be made in TS 38.331.
  • An example of a modification to the standard is shown in Table 3 below.
  • the network node when a radio link failure occurs in the transmission path of the F1-C signaling, switches the transmission path of the F1-C signaling, thereby ensuring smooth transmission of the F1-C signaling.
  • the embodiment of the second aspect of the present application provides a method for sending and receiving signals.
  • the method is applied to a first network node.
  • Fig. 5 is a schematic diagram of a method for sending and receiving signals according to an embodiment of the second aspect. As shown in Fig. 5, the method includes:
  • the first network node switches the transmission path of the F1-C signaling.
  • the network node when the transmission path of the F1-C signaling recovers from the radio link failure, switches the transmission path of the F1-C signaling, thereby ensuring the smooth operation of the F1-C signaling transmission.
  • the meaning of RLF recovery can refer to related technologies.
  • the completion of RLF recovery can refer to the completion of RRC re-establishment, or the selection of conditional handover (CHO, conditional handover) candidate cells and RRC re-establishment in the RRC re-establishment process The configuration is complete.
  • the first network node may be an IAB-node, for example, a) in FIG. 2 , b) in FIG. 2 or IAB-node 1 in FIG. 3 .
  • the embodiments of the second aspect will be described for different scenarios.
  • the first network node is a network node of New Radio Interface Dual Connectivity (NR-DC), for example, an IAB node of NR-DC.
  • NR-DC New Radio Interface Dual Connectivity
  • the primary cell group (MCG) RLF recovery of the first network node is completed, or the first network node has received a BH RLF recovery instruction from the MCG.
  • the first network node switches the transmission path of the F1-C signaling, including: the first network node transmits the F1-C signaling through an RRC message (for example, a ULInformationTransfer message) via a primary cell group (MCG). That is, the first network node uses the RRC message via the MCG link to carry the F1-C signaling for transmission.
  • RRC message for example, a ULInformationTransfer message
  • MCG primary cell group
  • the first network node restores the first parameter value configured for the first network node via RRC signaling to the configuration before MCG RLF occurs or before BH RLF detection indication is received.
  • the first parameter is, for example, f1c-TransferPathNRDC.
  • the first network node of the NR-DC may use the M-NG-RAN node via the MCG (for example, the M-NG-RAN node of Figure 2 a)) to transmit the F1-C through the RRC message (F1-C over RRC). For example, restore the f1c-TransferPathNRDC configuration to the configuration before RLF or before receiving the BH RLF detection indication.
  • the receiving part of the BAP entity needs to indicate that the upper layer has received the BH RLF detection indication from a certain ingress link, which The ingress link is the ingress link that receives the BAP control PDU.
  • enhancements to the BAP layer standard can be made in TS 38.340.
  • An example of a modification to the standard is shown in Table 4 below.
  • the first network node is a network node of EN-DC, eg, an IAB node of NR-DC.
  • the primary cell group (MCG) RLF recovery of the first network node is completed.
  • the first network node switches the transmission path of the F1-C signaling, including: the first network node transmits the F1-C signaling through RRC signaling via a primary cell group (MCG).
  • MCG primary cell group
  • the first network node restores the second parameter value configured for the first network node via RRC signaling to the configuration before RLF, where the second parameter value is, for example, f1c-TransferPath.
  • the first network node (for example, IAB-node 1 in FIG. 3 ) of the EN-DC may choose to perform F1-C transmission through RRC via MCG. For example, restore the f1c-TransferPath configuration to the configuration before RLF.
  • enhancements to the RRC standard can be made in TS 38.331.
  • An example of a modification to the standard is shown in Table 5 below.
  • the first network node is a network node of New Radio Interface Dual Connectivity (NR-DC), for example, an IAB node of NR-DC.
  • NR-DC New Radio Interface Dual Connectivity
  • the secondary cell group (SCG) RLF of the first network node recovers, or the first network node receives a BH RLF recovery indication from the SCG.
  • the first network node switches the transmission path of the F1-C signaling, including: the first network node transmits the F1-C signaling through RRC signaling via a secondary cell group (SCG). That is, the first network node uses the RRC message via the SCG link to carry the F1-C signaling for transmission.
  • SCG secondary cell group
  • the first network node restores the first parameter value configured for the first network node via RRC signaling to the configuration before SCG RLF or before receiving the BH RLF detection indication, where the first parameter is, for example, f1c-TransferPathNRDC.
  • the first parameter is, for example, f1c-TransferPathNRDC.
  • the first network node of NR-DC may use the S-NG-RAN node via the SCG (for example, Figure 2 b) to transmit F1- through RRC signaling C (F1-C over RRC).
  • the receiving part of the BAP entity needs to indicate that the upper layer has received the BH RLF recovery indication from a certain ingress link, which The ingress link is the ingress link that receives the BAP control PDU.
  • enhancements to the BAP layer standard can be made in TS 38.340.
  • An example of modification to the standard can be shown in Table 4 above, for example.
  • scenario 2 of b) in FIG. 2 the following method 1 or method 2 may be used to implement operation 502 .
  • Method 1 similar to the embodiment for scenario 1 in a) of FIG. 2 , that is, the first network node rolls back the f1c-TransferPathNRDC configuration.
  • Enhancements to the RRC standard can be made in TS 38.331.
  • An example of a modification to the standard is shown in Table 6 below.
  • Method 2 roll back the value of the third parameter of the split SRB2, where the third parameter is, for example, primaryPath.
  • the network node when the transmission path of the F1-C signaling recovers from the radio link failure, switches the transmission path of the F1-C signaling, thereby ensuring the smooth operation of the F1-C signaling transmission.
  • the embodiment of the third aspect provides a device for sending and receiving signals.
  • the device is applied to a first network node.
  • the device may be the first network node, and the device may also be a part of the first network node.
  • the apparatus corresponds to the method of an embodiment of the first aspect.
  • FIG. 6 is a schematic diagram of signals of the device for sending and receiving signals according to an embodiment of the present application.
  • the device for sending and receiving signals 600 includes: a first processing unit 601 and a first switching unit 602 .
  • the first processing unit 601 detects that a radio link failure (RLF) has occurred in the transmission path of the F1-C signaling or has received a backhaul radio link failure (BH RLF) detection indication; and
  • RLF radio link failure
  • BH RLF backhaul radio link failure
  • the first switching unit 602 enables the first network node to switch the transmission path of the F1-C signaling.
  • the first network node is a network node of New Radio Interface Dual Connectivity (NR-DC), and the first processing unit 601 detects that a primary cell group (MCG) RLF occurs, or the first processing unit 601 detects from MCG receives BH RLF detection indication.
  • switching the transmission path of the F1-C signaling by the first network node includes: the first network node transmits the F1-C signaling through a Backhaul Adaptation Protocol (BAP) layer via a Secondary Cell Group (SCG).
  • BAP Backhaul Adaptation Protocol
  • SCG Secondary Cell Group
  • the first network node selects or modifies a first parameter value configured for the first network node via RRC signaling, and the first parameter value is used to specify a transmission path of the F1-C signaling.
  • the first parameter indicates MCG
  • the first parameter is set to indicate SCG.
  • the first network node is an EN-DC (E-UTRA-NR Dual Connectivity) network node, and the first processing unit detects that a primary cell group (MCG) RLF occurs.
  • switching the transmission path of the F1-C signaling by the first network node includes: the first network node transmits the F1-C signaling through a Backhaul Adaptation Protocol (BAP) layer via a Secondary Cell Group (SCG).
  • BAP Backhaul Adaptation Protocol
  • SCG Secondary Cell Group
  • the first network node selects or modifies a second parameter value configured for the first network node via RRC signaling, and the second parameter value is used to specify a transmission path of the F1-C signaling.
  • the second parameter indicates long-term evolution (lte)
  • the second parameter is set to indicate new radio (nr).
  • the first network node is a network node of New Radio Interface Dual Connectivity (NR-DC), and the first processing unit detects that a Secondary Cell Group (SCG) RLF occurs, or, the first processing unit 601 receives from the SCG Received BH RLF detection indication.
  • switching the transmission path of the F1-C signaling by the first network node includes: the first network node transmits the F1-C signaling through a Backhaul Adaptation Protocol (BAP) layer via a Master Cell Group (MCG).
  • BAP Backhaul Adaptation Protocol
  • MCG Master Cell Group
  • the first network node selects or modifies a first parameter value configured for the first network node via RRC signaling, and the first parameter value is used to specify a transmission path of the F1-C signaling. For example, in case the first parameter indicates SCG, the first parameter is set to indicate MCG.
  • the first network node modifies the third parameter value in the PDCP entity of the split SRB2 configured via RRC. Specifically, when SRB2 is configured as a split SRB, packet data convergence protocol repetition (pdcp-Duplication) is not configured, and the third parameter in the PDCP entity of SRB2 points to the SCG, the first network node sets the third parameter to point to the MCG.
  • pdcp-Duplication packet data convergence protocol repetition
  • the receiving part of the BAP entity indicates that the upper layer has received the BH RLF detection indication and the ingress link of the BAP control PDU.
  • the embodiment of the fourth aspect provides a device for sending and receiving signals.
  • the device is applied to a first network node.
  • the device may be the first network node, and the device may also be a part of the first network node.
  • the apparatus corresponds to the method of an embodiment of the second aspect.
  • FIG. 7 is a schematic diagram of a device for sending and receiving signals according to an embodiment of the present application.
  • the device for sending and receiving signals 700 includes: a second switching unit 701 .
  • the second switching unit 701 When the recovery of the radio link failure (RLF) is completed or the first network node receives a backhaul radio link failure (BH RLF) recovery indication, the second switching unit 701 enables the first network node to switch the F1-C signaling transmission path.
  • RLF radio link failure
  • BH RLF backhaul radio link failure
  • the first network node is a new air interface dual connectivity (NR-DC) network node, and the primary cell group (MCG) RLF recovery of the first network node is completed, or the first network node is from The MCG receives the BH RLF recovery instruction.
  • switching the transmission path of the F1-C signaling by the first network node includes: switching by the first network node to transmit the F1-C signaling through an RRC message via a primary cell group (MCG).
  • MCG primary cell group
  • the first network node restores the first parameter value configured for the first network node via RRC signaling to the configuration before MCG RLF occurs or before receiving a BH RLF detection indication, and the first parameter value is used to specify Transmission path of F1-C signaling.
  • the value of the first parameter is set to the value before the MCG RLF occurs or before the BH RLF detection indication is received.
  • the first network node is an EN-DC (E-UTRA-NR Dual Connectivity) network node, and the primary cell group (MCG) RLF recovery of the first network node is completed.
  • switching the transmission path of the F1-C signaling by the first network node includes: the first network node transmits the F1-C signaling through RRC signaling via a primary cell group (MCG).
  • MCG primary cell group
  • the first network node restores the second parameter value configured for the first network node via RRC signaling to the configuration before RLF, and the second parameter value is used to specify the transmission path of the F1-C signaling.
  • the second parameter is not reconfigured by RRC signaling, the value of the second parameter is set to the value before MCG RLF occurs.
  • the first network node is a network node of New Radio Interface Dual Connectivity (NR-DC), and the Secondary Cell Group (SCG) RLF of the first network node is restored, or the first network node recovers from the SCG
  • the BH RLF recovery instruction is received.
  • switching the transmission path of the F1-C signaling by the first network node includes: the first network node transmits the F1-C signaling through RRC signaling via a secondary cell group (SCG).
  • the first network node restores the first parameter value configured for the first network node via RRC signaling to the configuration before SCG RLF or before receiving the BH RLF detection indication, and the first parameter value is used to specify F1- C signaling transmission path.
  • the first parameter is not reconfigured by RRC signaling, the value of the first parameter is set to the value before SCG RLF occurs or before BH RLF detection indication is received.
  • the first network node may also modify the third parameter value in the PDCP entity of the split SRB2 configured via RRC. For example, when SRB2 is configured as a split SRB, packet data convergence protocol repetition (pdcp-Duplication) is not configured, and the third parameter in the PDCP entity of SRB2 points to the MCG, the first network node sets the third parameter Set to point to SCG.
  • pdcp-Duplication packet data convergence protocol repetition
  • the receiving part of the BAP entity indicates that the upper layer has received the BH RLF recovery indication and the entry of the BAP control PDU link.
  • An embodiment of the present application also provides a communication system, where the communication system may include a first network node.
  • the first network node may be an IAB-node, for example, IAB-node 1 in FIG. 2 or FIG. 3 .
  • Fig. 8 is a schematic structural diagram of a first network node according to an embodiment of the present application.
  • the first network node 800 may include: a processor 810 (such as a central processing unit CPU) and a memory 820 ; the memory 820 is coupled to the processor 810 .
  • the memory 820 can store various data; in addition, it also stores a program 830 for information processing, and executes the program 830 under the control of the processor 810 .
  • the processor 810 may be configured to execute a program to implement the method performed by the IAB-node in the embodiment of the first aspect or the embodiment of the second aspect.
  • the first network node 800 may further include: a transceiver 840 and an antenna 850 ; wherein, the functions of the above components are similar to those of the prior art, and will not be repeated here. It should be noted that the first network node 800 does not necessarily include all components shown in FIG. 8 ; in addition, the first network node 800 may also include components not shown in FIG. 8 , and reference may be made to the prior art.
  • An embodiment of the present application also provides a computer program, wherein when the program is executed in the first network node, the program causes the first network node to execute the method described in the first aspect or the second aspect embodiment .
  • the embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program causes the first network node to execute the method described in the embodiment of the first aspect or the second aspect.
  • the above devices and methods in this application can be implemented by hardware, or by combining hardware and software.
  • the present application relates to a computer-readable program that, when executed by a logic component, enables the logic component to realize the above-mentioned device or constituent component, or enables the logic component to realize the above-mentioned various methods or steps.
  • the present application also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memories, and the like.
  • the method/device described in conjunction with the embodiments of the present application may be directly embodied as hardware, a software module executed by a processor, or a combination of both.
  • one or more of the functional block diagrams shown in the figure and/or one or more combinations of the functional block diagrams may correspond to each software module or each hardware module of the computer program flow.
  • These software modules may respectively correspond to the steps shown in the figure.
  • These hardware modules for example, can be realized by solidifying these software modules by using a Field Programmable Gate Array (FPGA).
  • FPGA Field Programmable Gate Array
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other form of storage medium known in the art.
  • a storage medium can be coupled to the processor such that the processor can read information from, and write information to, the storage medium, or it can be an integral part of the processor.
  • the processor and storage medium can be located in the ASIC.
  • the software module can be stored in the memory of the mobile terminal, or can be stored in a memory card that can be inserted into the mobile terminal.
  • the software module can be stored in the MEGA-SIM card or large-capacity flash memory device.
  • One or more of the functional blocks described in the accompanying drawings and/or one or more combinations of the functional blocks can be implemented as a general-purpose processor, a digital signal processor (DSP) for performing the functions described in this application ), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any suitable combination thereof.
  • DSP digital signal processor
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • One or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors processor, one or more microprocessors in communication with a DSP, or any other such configuration.
  • a method for sending and receiving signals, applied to a first network node comprising:
  • the first network node detects that a radio link failure (RLF) has occurred on the transmission path of the F1-C signaling or has received a backhaul radio link failure (BH RLF) detection indication; and
  • RLF radio link failure
  • BH RLF backhaul radio link failure
  • the first network node switches the transmission path of the F1-C signaling.
  • the first network node is a new air interface dual connectivity (NR-DC) network node,
  • the first network node detects that a master cell group (MCG) RLF has occurred, or the first network node receives the BH RLF detection indication from the MCG.
  • MCG master cell group
  • Switching the transmission path of the F1-C signaling by the first network node includes:
  • the first network node transmits the F1-C signaling through the backhaul adaptation protocol (BAP) layer via the secondary cell group (SCG).
  • BAP backhaul adaptation protocol
  • SCG secondary cell group
  • the first network node selects or modifies a first parameter value configured for the first network node via RRC signaling, where the first parameter value is used to specify a transmission path of the F1-C signaling.
  • the first network node is a network node of EN-DC (E-UTRA-NR Dual Connectivity),
  • the first network node detects that a Master Cell Group (MCG) RLF has occurred.
  • MCG Master Cell Group
  • Switching the transmission path of the F1-C signaling by the first network node includes:
  • the first network node transmits the F1-C signaling through the backhaul adaptation protocol (BAP) layer via the secondary cell group (SCG).
  • BAP backhaul adaptation protocol
  • SCG secondary cell group
  • the first network node selects or modifies a second parameter value configured for the first network node via RRC signaling, where the second parameter value is used to specify a transmission path of the F1-C signaling.
  • the first parameter indicates MCG
  • the first parameter is set to indicate SCG
  • the second parameter indicates long term evolution (lte)
  • the second parameter is set to indicate new radio (nr).
  • the first network node is a new air interface dual connectivity (NR-DC) network node,
  • the first network node detects that secondary cell group (SCG) RLF occurs, or the first network node receives the BH RLF detection indication from the SCG.
  • SCG secondary cell group
  • Switching the transmission path of the F1-C signaling by the first network node includes:
  • the first network node transmits the F1-C signaling through the Backhaul Adaptation Protocol (BAP) layer via the Master Cell Group (MCG).
  • BAP Backhaul Adaptation Protocol
  • MCG Master Cell Group
  • the first network node selects or modifies a first parameter value configured for the first network node via RRC signaling, where the first parameter value is used to specify a transmission path of F1-C signaling.
  • the first parameter indicates SCG
  • the first parameter is set to indicate MCG
  • the first network node modifies the third parameter value in the PDCP entity of the split SRB2 configured via RRC.
  • SRB2 When SRB2 is configured as a split SRB, packet data convergence protocol duplication (pdcp-Duplication) is not configured, and the third parameter in the PDCP entity of SRB2 points to SCG, the first network node sets the third The parameter is set to point to the MCG.
  • pdcp-Duplication packet data convergence protocol duplication
  • the receiving part of the BAP entity indicates that the upper layer has received the BH RLF detection indication and received the BAP control The ingress link of the PDU.
  • PDU BAP control protocol data unit
  • a method for sending and receiving signals, applied to a first network node comprising:
  • said first network node receives a BAP control protocol data unit (PDU) indicating a backhaul radio link failure (BH RLF) detection from a lower layer; and
  • PDU BAP control protocol data unit
  • BH RLF backhaul radio link failure
  • the receiving part of the BAP entity indicates that the upper layer has received the BH RLF detection indication and received the ingress link of the BAP control PDU.
  • a method for transmitting and receiving signals, applied to a first network node comprising:
  • the radio link failure (RLF) recovery is completed or the first network node has received a backhaul radio link failure (BH RLF) recovery indication;
  • the first network node switches the transmission path of the F1-C signaling.
  • the first network node is a new air interface dual connectivity (NR-DC) network node,
  • the primary cell group (MCG) RLF recovery of the first network node is completed, or the first network node receives the BH RLF recovery instruction from the MCG.
  • Switching the transmission path of the F1-C signaling by the first network node includes:
  • the first network node switches to transmit the F1-C signaling through an RRC message via a primary cell group (MCG).
  • MCG primary cell group
  • the first network node restores the first parameter value configured for the first network node via RRC signaling to the configuration before MCG RLF occurs or before receiving a BH RLF detection indication, and the first parameter value is used for Specifies the transmission path of F1-C signaling.
  • the first network node is a network node of EN-DC (E-UTRA-NR Dual Connectivity),
  • the primary cell group (MCG) RLF recovery of the first network node is completed.
  • Switching the transmission path of the F1-C signaling by the first network node includes:
  • the first network node transmits the F1-C signaling through the primary cell group (MCG) through RRC signaling.
  • MCG primary cell group
  • the first network node restores the second parameter value configured for the first network node via RRC signaling to the configuration before RLF, and the second parameter value is used to specify a transmission path of the F1-C signaling.
  • the first parameter is not reconfigured by RRC signaling, set the value of the first parameter to the value before MCG RLF occurs or before BH RLF detection indication is received.
  • the first network node is a new air interface dual connectivity (NR-DC) network node,
  • the secondary cell group (SCG) RLF of the first network node recovers, or the first network node receives the BH RLF recovery indication from the SCG.
  • Switching the transmission path of the F1-C signaling by the first network node includes:
  • the first network node transmits the F1-C signaling through the secondary cell group (SCG) through RRC signaling.
  • SCG secondary cell group
  • the first network node restores the first parameter value configured for the first network node via RRC signaling to the configuration before SCG RLF or before receiving a BH RLF detection indication, and the first parameter value is used to specify F1 -C signaling transmission path.
  • the first parameter is not reconfigured by RRC signaling, set the value of the first parameter to the value before SCG RLF occurs or before BH RLF detection indication is received.
  • the first network node modifies the third parameter value in the PDCP entity of the split SRB2 configured via RRC.
  • SRB2 When SRB2 is configured as a split SRB, packet data convergence protocol repetition (pdcp-Duplication) is not configured, and the third parameter in the PDCP entity of SRB2 points to MCG, the first network node sets the third The parameter is set to point to the SCG.
  • pdcp-Duplication packet data convergence protocol repetition
  • the receiving part of the BAP entity indicates that the upper layer has received the BH RLF recovery indication and received the BAP control The ingress link of the PDU.
  • PDU BAP control protocol data unit
  • a method for transmitting and receiving signals, applied to a first network node comprising:
  • said first network node receives a BAP control protocol data unit (PDU) from a lower layer for a Backhaul Radio Link Failure (BH RLF) recovery indication; and
  • PDU BAP control protocol data unit
  • BH RLF Backhaul Radio Link Failure
  • the receiving part of the BAP entity indicates that the upper layer has received the BH RLF recovery indication, and received the ingress link of the BAP control PDU.

Abstract

本申请实施例提供一种收发信号的方法、装置和通信系统,该收发信号的装置应用于第一网络节点,该装置包括:第一处理单元,其检测到F1-C信令的传输路径发生了无线链路失败(RLF)或者收到了回传无线链路失败(BH RLF)检测指示;以及第一切换单元,其使所述第一网络节点切换F1-C信令的传输路径。

Description

收发信号的方法、装置和通信系统 技术领域
本申请实施例涉及通信技术领域。
背景技术
集成的接入和回传(Integrated access and backhaul,IAB)又称接入回传一体化,在下一代无线接入网络(NG-RAN:next generation radio access network)中实现了无线中继的功能。集成的接入和回传节点(IAB-node)支持通过新无线(New Radio,NR)的接入和回传。NR回传在网络侧中终止点被称为IAB-donor,它表示一个具有支持IAB功能的网络设备(例如,gNB)。
IAB-node可以通过一跳或者多跳来连接到一个IAB宿主(IAB-donor)。这些多跳连接形成了一个以IAB宿主为根节点的有向无环图(DAG,Directed Acyclic Graph)拓扑结构。IAB宿主负责执行IAB网络拓扑中集中式的资源管理、拓扑管理和路由管理。
IAB-node支持gNB-DU(distributed unit,分布式单元)的功能,IAB-node DU也被称为IAB-DU,IAB-DU是到终端设备(UE)和下一跳IAB-node的无线接入(NR access)接口的终点,也是到IAB-donor上的gNB-CU(central unit,中心单元)的F1协议的终点。IAB-DU可以服务普通的UE和IAB子节点。IAB-DU实现网络侧设备功能,连接到下游的child IAB-node,对UE以及下游child IAB-node提供NR空口接入并与IAB donor-CU之间建立有F1连接。
除了gNB-DU功能,IAB-node也支持一部分UE的功能,被称为IAB-MT(Mobile Termination),IAB-MT包括比如物理层、层2、RRC和NAS功能来连接到另一个IAB-node或IAB-donor的gNB-DU、连接到IAB-donor上的gNB-CU和连接到核心网。IAB-MT可支持如UE物理层、接入(access stratum,AS)、无线资源控制(radio resource control,RRC)层和非接入(non-access stratum,NAS)层功能,可以连接到IAB父节点。
IAB-donor是网络侧的终结节点,IAB-donor通过回传或接入链路为IAB-MT或UE提供网络接入。IAB-donor又进一步分为IAB-donor-CU(central unit)和 IAB-donor-DU。IAB-DU和IAB-donor-CU之间通过F1接口连接。在独立组网场景下,gNB与IAB-donor-CU之间通过Xn接口连接。
为了支持数据包的多跳路由转发,IAB引入了回传适配协议(Backhaul Adaptation Protocol,BAP)子层。BAP子层位于无线链路控制(RLC)子层之上、IP层之下,支持数据包目的节点及路径选择、数据包路由转发、承载映射、流控反馈、回传链路失败通知等功能。
图1是IAB拓扑结构的一个示意图。如图1所示,在IAB拓扑结构10中,IAB-node100包括IAB-MT功能单元101和IAB-DU功能单元102,IAB-DU功能单元102的接口上的邻节点被称为子节点(child node),如图1中所示的子节点201、202、203,IAB-DU功能单元102与子节点201、202、203之间可以通过空中接口(Uu)进行通信;IAB-MT功能单元101的接口上的邻节点被称为父节点(parent node),如图1中所示的父节点301、302,IAB-MT功能单元101与父节点301、302之间可以通过空中接口(Uu)进行通信。
如图1所示,IAB-node 100到子节点201、202、203的方向被称为下游(downstream)方向,IAB-node 100到父节点301、302的方向被称为上游(upstream)方向。IAB-donor(未图示)为该IAB拓扑结构10执行集中式的资源、拓扑和路由管理。
应该注意,上面对技术背景的介绍只是为了方便对本申请的技术方案进行清楚、完整的说明,并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本申请的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
在多跳场景下,为了实现数据包的中继转发,IAB节点需要确定数据包到达的目标节点,然后根据路由表确定到达目标节点对应的下一跳节点并发送。由donor-CU通过F1AP信令为IAB节点配置从IAB节点发起的上行每个F1-U Tunnel、非用户设备关联的(Non-UE associated)F1AP消息、用户设备关联的(UE-associated)F1AP消息、非F1运输(Non-F1Traffic)到BAP路由标识的映射。
IAB节点根据路由标识映射信息确定从IAB节点发起的不同类型上行IP包对应的BAP路由标识,并为这些上行IP包封装包含BAP路由标识信息的BAP子头。Donor-CU通过F1AP信令为donor-DU配置不同类型的下行数据包到BAP路由标识 的映射。Donor-DU根据路由标识映射信息确定收到的下行IP包对应的BAP路由标识,并为这些下行IP包封装包含BAP路由标识下行的BAP子头。
BAP路由标识包括目的BAP地址和从IAB节点到donor-DU之间的路径标识(path identity)。BAP地址在BAP报头中也被称为DESTINATION(目的地)。每个IAB节点及donor-DU都被配置了一个BAP地址。
在新空口双连接(NR-NR Dual Connectivity,NR-DC)中,被封装到流控制传输协议/IP(SCTP/IP)中的F1-AP消息或者F1-C相关的SCTP/IP数据包可以通过BAP子层传递(transfer),也可以通过IAB节点和对应的非F1终结(non-F1-termination)节点之间的信令无线承载(Signalling Radio Bearer,SRB)传递。当主小区组(master cell group,MCG)和辅小区组(secondary cell group,SCG)都被配置成可以传递被封装到SCTP/IP中的F1-AP消息或者F1-C相关的SCTP/IP数据包时,由IAB的实现来选择路径。
对F1-C或者F1-C相关的数据通过SRB来进行传输(transport)是为了对F1-U和F1-C选择不同的路径,也就是控制平面-用户平面(control plane-user plane,CP-UP)分离。目的是为了更好地保证控制平面的传输,为控制平面选择更短的路径或者是无线信道条件更好的链路,比如选择FR1(frequency range 1)所在的链路。
图2是在两种NR-DC场景下达到CP-UP分离的示意图。
场景1:IAB节点1(图2的a)中的双连接节点)和IAB-donor 2(即,F1终结节点(F1-termination node),图2的a)中的辅节点)通过NR接入链路经由主节点(非F1终结节点)来交换被封装到SCTP/IP中的F1-AP消息或者F1-C相关的SCTP/IP数据包;通过回传链路和SN(secondary node,辅节点)来交换F1-U流量。SRB2被用来传输IAB-MT和MN(master node,主节点)之间的被封装到SCTP/IP中的F1-AP消息或者F1-C相关的SCTP/IP数据包。这些被封装到SCTP/IP中的F1-AP消息或者F1-C相关的SCTP/IP数据包在MN和SN之间通过XnAP作为一个容器进行传递。在图2的a)中,主节点(MN)是M-NG-RAN node。
场景2:IAB节点1和MN(F1终结节点,图2的b)中的IAB-donor 2)通过NR接入链路经由SN(非F1终结节点)来交换被封装到SCTP/IP中的F1-AP消息或者F1-C相关的SCTP/IP数据包;通过回传链路和MN来交换F1-U流量。分裂的(split)SRB2被用来传输IAB-MT和SN之间的被封装到SCTP/IP中的F1-AP消息或者F1-C 相关的SCTP/IP数据包。这些被封装到SCTP/IP中的F1-AP消息或者F1-C相关的SCTP/IP数据包在SN和MN之间通过XnAP作为一个容器进行传递。在图2的b)中,辅节点(SN)是S-NG-RAN node。
这些被封装到SCTP/IP中的F1-AP消息或者F1-C相关的(SCTP/)IP数据包可以通过BAP子层或SRB传递,但是不支持在同一个父节点链路上同时使用这两种方法。如果RRC在指示用于F1-C流量传输的小区组配置了用于传输F1-C流量的BH RLC信道,则被封装到SCTP/IP中的F1-AP消息或者F1-C相关的(SCTP/)IP数据包通过BAP子层传递。
分裂的SRB指在多重无线双连接(Multi-Radio Dual Connectivity,MR-DC)中,MN和终端设备(例如,UE)之间的和MCG和SCG都有RLC承载的SRB。对于分裂的SRB,下行的发送路径取决于网络实现;对于上行,UE通过被MN的RRC信令配置成使用MCG路径或者是在MCG和SCG上进行复制发送。
在演进的通用陆地无线接入-新无线双连接(E-UTRA-NR Dual Connectivity,EN-DC)场景下,被封装到SCTP/IP中的F1-AP消息或者F1-C相关的(SCTP/)IP数据包可以在IAB-donor和IAB节点之间通过E-UTRA(Evolved-UMTS Terrestrial Radio Access)来传递,如果被IAB-donor配置了的话。SRB2被用来传输IAB-MT和MN之间的被封装到SCTP/IP中的F1-AP消息或者F1-C相关的SCTP/IP数据包。这些被封装到SCTP/IP中的F1-AP消息或者F1-C相关的SCTP/IP数据包在MN和SN之间通过X2-AP作为一个容器进行传输。
图3是通过E-UTRA进行F1-C传递从而达到CP-UP分离的示意图。图3所示的场景和图2的a)所示的场景类似,区别在于:在图3中,主节点(MN)是LTE主基站(MeNB)并且主节点使用与MeNB对应的接口,例如,IAB-node 1与MeNB通过LTE Uu接口进行通信,IAB-donor 2与MeNB通过X2接口进行通信。
本申请的发明人发现,在以上图2和图3所示的几种CP-UP分离的场景中,如果在F1控制平面(F1-C)所在的路径发生了无线链路失败(RLF,radio link failure),由于F1-C是通过接入链路,而非回传链路与IAB-donor 2进行信息交换,所以BAP层的本地重新路由(local re-routing)方法不适用,IAB节点和IAB-donor之间的F1-C信令无法成功进行交换。
另外,在NR-DC的两种CP-UP分离场景中,双连接IAB节点1的F1-C信令通 过和MN(如图2的a)中所示)或SN(如图2的b)中所示)的接入链路由SRB进行消息传递;在某种情况下,IAB节点和该MN或SN之间可能还存在中间IAB节点。比如图2的a)中,双连接IAB节点1和MN之间可能会有其他IAB节点,也就是有父节点(未图示);这样,双连接IAB节点和该父节点之间可能会建立用于传输F1-U的BH RLC信道,也就是说,双连接IAB节点在MCG链路上也可以有回传链路,这种配置可以用于拓扑冗余的网络中;如果该父节点发生了RLF且给子节点发送回传无线链路失败检测指示(BH RLF detection indication),那么双连接节点会从MCG链路收到BH RLF检测指示。目前,针对上行BH数据,也就是经过BAP子层的上行数据,可以本地重新路由到另外的父节点回传链路。但是,由于CP-UP分离场景的F1-C消息是通过SRB放在RRC消息里传输,就不能使用本地重新路由。由于donor-CU配置的是F1-C需经由MCG链路,这样会导致双连接IAB节点的F1-C信令传输失败。图2的b)中的场景也存在类似的问题,不再赘述。
本申请的实施例提供一种收发信号的方法、装置和通信系统,在F1控制平面(F1-C)信令的传输路径发生无线链路失败时,网络节点切换F1-C信令的传输路径,由此,能够保证F1-C信令的顺利传输。
根据本申请实施例的一个方面,提供一种收发信号的装置,应用于第一网络节点,该装置包括:
第一处理单元,其检测到F1-C信令的传输路径发生了无线链路失败(RLF)或者收到了回传无线链路失败(BH RLF)检测指示;以及
第一切换单元,其使所述第一网络节点切换F1-C信令的传输路径。
根据本申请实施例的另一个方面,提供一种收发信号的装置,应用于第一网络节点,该装置包括:
第二切换单元,在无线链路失败(RLF)恢复完成或者所述第一网络节点收到了回传无线链路失败(BH RLF)恢复指示的情况下,所述第二切换单元使第一网络节点切换F1-C信令的传输路径。
根据本申请实施例的一个方面,提供一种收发信号的方法,应用于第一网络节点,该方法包括:
所述第一网络节点检测到F1-C信令的传输路径发生了无线链路失败(RLF)或者收到了回传无线链路失败(BH RLF)检测指示;以及
所述第一网络节点切换F1-C信令的传输路径。
根据本申请实施例的一个方面,提供一种收发信号的方法,应用于第一网络节点,该方法包括:
无线链路失败(RLF)恢复完成或者所述第一网络节点收到了回传无线链路失败(BH RLF)恢复指示;以及
所述第一网络节点切换F1-C信令的传输路径。
本申请实施例的有益效果在于:在F1控制平面(F1-C)信令的传输路径发生无线链路失败时,网络节点切换F1-C信令的传输路径,由此,能够保证F1-C信令的顺利传输。
参照后文的说明和附图,详细公开了本申请的特定实施方式,指明了本申请的原理可以被采用的方式。应该理解,本申请的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内,本申请的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以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、整件、步骤或组件的存在,但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
在本申请实施例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。此外,在附图中,类似的标号表示几个附图中对应的部件,并可用于指示多于一种实施方式中使用的对应部件。
图1是IAB拓扑结构的一个示意图;
图2是在两种NR-DC场景下达到CP-UP分离的示意图;
图3是通过E-UTRA进行F1-C传递从而达到CP-UP分离的示意图;
图4是第一方面的实施例的收发信号的方法的一个示意图;
图5是第二方面的实施例的收发信号的方法的一个示意图;
图6是第三方面的实施例的收发信号的装置信号的一示意图;
图7是第四方面的实施例的收发信号的装置信号的一示意图;
图8是第五方面的实施例的第一网络节点的一个构成示意图。
具体实施方式
参照附图,通过下面的说明书,本申请的前述以及其它特征将变得明显。在说明书和附图中,具体公开了本申请的特定实施方式,其表明了其中可以采用本申请的原则的部分实施方式,应了解的是,本申请不限于所描述的实施方式,相反,本申请包括落入所附权利要求的范围内的全部修改、变型以及等同物。
在本申请实施例中,术语“第一”、“第二”等用于对不同元素从称谓上进行区分,但并不表示这些元素的空间排列或时间顺序等,这些元素不应被这些术语所限制。术语“和/或”包括相关联列出的术语的一种或多个中的任何一个和所有组合。术语“包含”、“包括”、“具有”等是指所陈述的特征、元素、元件或组件的存在,但并不排除存在或添加一个或多个其他特征、元素、元件或组件。
在本申请实施例中,单数形式“一”、“该”等包括复数形式,应广义地理解为“一种”或“一类”而并不是限定为“一个”的含义;此外术语“所述”应理解为既包括单数形式也包括复数形式,除非上下文另外明确指出。此外术语“根据”应理解为“至少部分根据……”,术语“基于”应理解为“至少部分基于……”,除非上下文另外明确指出。
在本申请实施例中,术语“通信网络”或“无线通信网络”可以指符合如下任意通信标准的网络,例如新无线(NR,New Radio)、长期演进(LTE,Long Term Evolution)、增强的长期演进(LTE-A,LTE-Advanced)、宽带码分多址接入(WCDMA,Wideband Code Division Multiple Access)、高速报文接入(HSPA,High-Speed Packet Access)等等。
并且,通信系统中设备之间的通信可以根据任意阶段的通信协议进行,例如可以包括但不限于如下通信协议:1G(generation)、2G、2.5G、2.75G、3G、4G、4.5G以及5G、新无线(NR,New Radio)等等,和/或其他目前已知或未来将被开发的通信协议。
在本申请实施例中,术语“网络设备”例如是指通信系统中将终端设备接入通信网络并为该终端设备提供服务的设备。网络设备可以包括但不限于如下设备:集成的接入和回传节点(IAB-node)、中继(relay)、基站(BS,Base Station)、接入点(AP、Access Point)、发送接收点(TRP,Transmission Reception Point)、广播发射机、移动 管理实体(MME、Mobile Management Entity)、网关、服务器、无线网络控制器(RNC,Radio Network Controller)、基站控制器(BSC,Base Station Controller)等等。
其中,基站可以包括但不限于:节点B(NodeB或NB)、演进节点B(eNodeB或eNB)以及5G基站(gNB),等等,此外还可包括远端无线头(RRH,Remote Radio Head)、远端无线单元(RRU,Remote Radio Unit)、中继(relay)或者低功率节点(例如femeto、pico等等)。并且术语“基站”可以包括它们的一些或所有功能,每个基站可以对特定的地理区域提供通信覆盖。术语“小区”可以指的是基站和/或其覆盖区域,这取决于使用该术语的上下文。
在本申请实施例中,术语“用户设备”(UE,User Equipment)或者“终端设备”(TE,Terminal Equipment或Terminal Device)例如是指通过网络设备接入通信网络并接收网络服务的设备。终端设备可以是固定的或移动的,并且也可以称为移动台(MS,Mobile Station)、终端、用户台(SS,Subscriber Station)、接入终端(AT,Access Terminal)、站,等等。
其中,终端设备可以包括但不限于如下设备:蜂窝电话(Cellular Phone)、个人数字助理(PDA,Personal Digital Assistant)、无线调制解调器、无线通信设备、手持设备、机器型通信设备、膝上型计算机、无绳电话、智能手机、智能手表、数字相机,等等。
再例如,在物联网(IoT,Internet of Things)等场景下,终端设备还可以是进行监控或测量的机器或装置,例如可以包括但不限于:机器类通信(MTC,Machine Type Communication)终端、车载通信终端、设备到设备(D2D,Device to Device)终端、机器到机器(M2M,Machine to Machine)终端,等等。
此外,术语“网络侧”或“网络设备侧”是指网络的一侧,可以是某一基站,也可以包括如上的一个或多个网络设备。术语“用户侧”或“终端侧”或“终端设备侧”是指用户或终端的一侧,可以是某一UE,也可以包括如上的一个或多个终端设备。
在本申请的各实施例中,高层信令例如可以是无线资源控制(RRC)信令;例如称为RRC消息(RRC message),例如包括MIB、系统信息(system information)、专用RRC消息;或者称为RRC IE(RRC information element)。高层信令例如还可以是F1-C信令,或者叫F1AP协议。但本申请不限于此。
在本申请的各实施例中,第一网络节点例如是IAB节点(IAB-node),本申请将 以多跳IAB网络部署场景为例,对各实施例进行说明,其中,多个UE通过多跳的IAB节点,连接到IAB-donor,最后接入网络,该网络例如是5G网络。需要说明的是,本申请的各实施例可以不限于上述场景,例如,第一网络节点也可以是其它类型的网络节点。例如,实施例的场景也不局限于图示的几种双连接场景,也不仅限于CP-UP分离的场景。
第一方面的实施例
本申请第一方面的实施例提供一种收发信号的方法。该方法应用于第一网络节点。
图4是第一方面的实施例的收发信号的方法的一个示意图,如图4所示,该方法包括:
操作401、第一网络节点检测到F1-C信令的传输路径发生了无线链路失败(RLF)或者收到了回传无线链路失败(BH RLF)检测指示;以及
操作402、第一网络节点切换F1-C信令的传输路径。
根据第一方面的实施例,在F1-C信令的传输路径发生无线链路失败时,网络节点切换F1-C信令的传输路径,由此,能够保证F1-C信令的顺利传输。
第一方面的实施例中,第一网络节点可以是IAB-node,例如,图2的a)、图2的b)或图3中的IAB-node 1。
下面,以第一网络节点是IAB-node为例,针对不同场景,对第一方面的实施例进行说明。
针对图2的a)所示的场景1:
第一网络节点是新空口双连接(NR-DC)的网络节点,例如,NR-DC的IAB节点。
在操作401中,第一网络节点检测到发生了主小区组(MCG)RLF,或者,第一网络节点从MCG收到了该BH RLF检测指示。
在操作402中,第一网络节点切换F1-C信令的传输路径,包括:第一网络节点经由辅小区组(SCG)通过回传适应协议(BAP)层传输F1-C信令。即,第一网络节点使用在SCG链路上为F1-C流量配置的BH RLC信道传输F1-C信令。
例如,第一网络节点选择或修改经由RRC信令为所述第一网络节点配置的第一参数值,第一参数值用于指定F1-C信令的传输路径。
其中,第一参数例如是f1c-TransferPathNRDC。RRC信令中可以为IAB节点配置该第一参数f1c-TransferPathNRDC。该参数指定了NR-DC的IAB节点的IAB-MT在向IAB-donor-CU传递F1-C数据包时应该使用的传递路径。
如果IAB-MT的该参数被配置成“mcg”(即,参数值为mcg),IAB-MT只能使用MCG来进行F1-C传递。如果IAB-MT被配置成“scg”(即,参数值为scg),IAB-MT只能使用SCG来进行F1-C传递。如果IAB-MT被配置成“both”,由IAB-MT来选择MCG或者是SCG来进行F1-C传递。
例如,针对图2的a)所示的CP-UP分离的场景1,如果发生了MCG RLF,或者第一网络节点(例如,IAB-node 1)从MCG收到了BH RLF检测指示;
NR-DC的第一网络节点(例如,图2的a)的IAB-node 1)可以使用经由SCG(例如,图2的a)的IAB-donor 2)通过BAP层来传输F1-C(F1-C over BAP),而不管f1c-TransferPathNRDC配置如何,即,使用在SCG链路上为F1-C流量配置的BH RLC信道。例如,IAB-node 1自主选择f1c-TransferPathNRDC配置,即,IAB-node 1将网络配置的f1c-TransferPathNRDC的参数值修改为scg。
在针对图2的a)的场景1的实施例中,在定义BAP层的BH RLF相关指示的接收操作时,可以增加如下行为(该行为可以不限于针对双连接的网络节点):
当第一网络节点从低层(即,入口BH RLC信道)收到一个关于BH RLF检测指示的BAP控制PDU时,BAP实体的接收部分需要指示高层从某入口链路收到了BH RLF检测指示,该入口链路为收到该BAP控制PDU的入口链路。
例如,可以在TS 38.340中对BAP层标准进行增强。一个对标准的修改示例如下面的表1所示。
表1
Figure PCTCN2022075847-appb-000001
针对图3所示的场景:
第一网络节点是EN-DC的网络节点,例如,NR-DC的IAB节点。
在操作401中,第一网络节点检测到发生了主小区组(MCG)RLF。
在操作402中,第一网络节点切换F1-C信令的传输路径,包括:第一网络节点经由辅小区组(SCG)通过回传适应协议(BAP)层传输F1-C信令。例如,第一网络节点选择或修改经由RRC信令为第一网络节点配置的第二参数值,该第二参数值用于指定F1-C信令的传输路径,具体地,在第二参数指示长期演进(lte)的情况下,将该第二参数设置为指示新无线(nr)。
其中,第二参数例如是f1c-TransferPath。RRC信令中可以为IAB节点配置该第二参数f1c-TransferPath。该第二参数指定了EN-DC的IAB-MT在向IAB-donor-CU传递F1-C数据包时应该使用的传递路径。
如果IAB-MT的该参数被配置成“lte”,IAB-MT只能使用LTE链路来进行F1-C传递。如果IAB-MT被配置成“nr”,IAB-MT只能使用NR链路来进行F1-C传递。如果IAB-MT被配置成“both”,由IAB-MT来选择LTE或者是NR链路来进行F1-C传递。如果没有配置,IAB节点使用NR链路作为缺省配置。
例如,针对图3所示的EN-DC的IAB-node在CP-UP分离的场景中(即,通过E-UTRA进行F1-C传递),如果发生了MCG RLF;
EN-DC的第一网络节点(例如,图3的IAB-node 1)EN-DC的IAB节点可以使用经由SCG(例如,图2的a)的IAB-donor 2)通过BAP层来传输F1-C(F1-C over BAP),而不管f1c-TransferPath配置如何。即,使用在SCG链路上为F1-C流量配置的BH RLC信道。例如,IAB-node自主选择f1c-TransferPath配置,即IAB-node修改网络配置的f1c-TransferPath参数值为nr。
针对图2的a)所示的场景1以及图3所示的场景,在至少一些实施例中,在定义RRC和RLF相关行为时,可以增加如下行为:
如果是NR-DC连接状态的IAB节点(即,图2的a)的IAB-node 1),当MCG RLF时,或者是从MCG的BAP实体收到BH RLF检测指示时,如果f1c-TransferPathNRDC指示“mcg”,那么将f1c-TransferPathNRDC设为“scg”;
如果是EN-DC连接状态的IAB节点(即,图3的IAB-node 1),当MCG RLF时,如果f1c-TransferPath指示“lte”,那么将f1c-TransferPath设为“nr”。
例如,可以在TS 38.331中对RRC标准进行增强。一个对标准的修改示例如下面的表2所示。
表2
Figure PCTCN2022075847-appb-000002
针对图2的b)所示的场景2:
第一网络节点是新空口双连接(NR-DC)的网络节点,例如,NR-DC的IAB节点。
在操作401中,第一网络节点检测到发生了辅小区组(SCG)RLF,或者,第一网络节点从SCG收到了该BH RLF检测指示。
在操作402中,第一网络节点切换F1-C信令的传输路径,包括:第一网络节点经由主小区组(MCG)通过回传适应协议(BAP)层传输F1-C信令。即,第一网络节点使用在MCG链路上为F1-C流量配置的BH RLC信道传输F1-C信令(对应下述的方法1),或者,第一网络节点经由主小区组通过RRC消息携带F1-C信令(对应下述的方法2)。
例如,第一网络节点选择或修改经由RRC信令为所述第一网络节点配置的第一参数值,其中,第一参数例如是f1c-TransferPathNRDC。具体地,在第一参数指示SCG的情况下,第一网络节点可以将第一参数值设置为指示MCG。
在一个具体实施方式中,针对图2的b)所示的CP-UP分离的场景2,如果发生了SCG RLF,或者第一网络节点(例如,IAB-node 1)从SCG收到了BH RLF检测指示:
NR-DC的第一网络节点(例如,图2的b)的IAB-node 1)可以使用经由MCG(例如,图2的b)的IAB-donor 2)通过BAP层来传输F1-C(F1-C over BAP),而 不管f1c-TransferPathNRDC配置如何,即,使用在MCG链路上为F1-C流量配置的BH RLC信道。例如,IAB-node 1自主选择f1c-TransferPathNRDC配置,即,IAB-node 1将网络配置的f1c-TransferPathNRDC的参数值修改为mcg。
在针对图2的b)的场景2的实施例中,在定义BAP层的BH RLF相关指示的接收操作时,可以增加如下行为:
当第一网络节点从低层(即,入口BH RLC信道)收到一个关于BH RLF检测指示的BAP控制PDU时,BAP实体的接收部分需要指示高层从某入口链路收到了BH RLF检测指示,该入口链路为收到该BAP控制PDU的入口链路。
例如,可以在TS 38.340中对BAP层标准进行增强。一个对标准的修改示例例如可以如上面的表1所示。
在针对图2的b)的场景2的实施例中,可以使用如下的方法1或者方法2来实现操作402。
方法1:与针对图2的a)的场景1的实施例类似,即,第一网络节点自主选择f1c-TransferPathNRDC配置,即,IAB-node修改网络配置的f1c-TransferPathNRDC参数值。
例如,在定义RRC的和RLF相关行为时,可以增加如下行为:
如果是作为IAB节点连接,当SCG RLF时,或者是从SCG的BAP实体收到BH RLF检测指示时,如果f1c-TransferPathNRDC指示“scg”,那么将f1c-TransferPathNRDC设为“mcg”。
方法2:修改经由RRC配置的分裂的SRB2的第三参数值,第三参数例如是primaryPath。
RRC消息中的信息元素(IE)RadioBearerConfig用来增加、修改或者释放信令和/或数据无线承载。具体来说,这个IE携带了分组数据汇聚协议(PDCP)参数等。其中关于PDCP参数的IE PDCP-Config包含primaryPath(即,第三参数),用于指示当这个PDCP实体关联了多于一个RLC实体时用于上行数据传输的主RLC实体的小区组ID和逻辑信道标识(Logical Channel Identification,LCID)。网络设备使用不同小区组的逻辑信道来指示分裂的承载的小区组。
在场景2中,F1-C由分裂的SRB2来承载,且网络设备会配置primaryPath指向SCG。因此,可以由IAB节点自主选择primaryPath配置,也即,IAB修改网络配置的primaryPath参数值。
例如,在定义RRC的和RLF相关行为时,可以增加如下行为:
如果是作为IAB节点连接,当SCG RLF时,或者是从SCG的BAP实体收到BH RLF检测指示时,如果SRB2被配置成分裂的SRB,分组数据汇聚协议重复(pdcp-Duplication)没有配置,SRB2的PDCP实体中的primaryPath指向SCG,那么将primaryPath设为指向MCG。
可以在TS 38.331中对RRC标准进行增强。一个对标准的修改示例如下面的表3所示。
表3
Figure PCTCN2022075847-appb-000003
根据第一方面的实施例,在F1-C信令的传输路径发生无线链路失败时,网络节点切换F1-C信令的传输路径,由此,能够保证F1-C信令的顺利传输。
第二方面的实施例
本申请第二方面的实施例提供一种收发信号的方法。该方法应用于第一网络节点。
图5是第二方面的实施例的收发信号的方法的一个示意图,如图5所示,该方法包括:
操作501、无线链路失败(RLF)恢复完成或者第一网络节点收到了回传无线链路失败(BH RLF)恢复指示;以及
操作502、第一网络节点切换F1-C信令的传输路径。
根据第二方面的实施例,在F1-C信令的传输路径从无线链路失败中恢复时,网络节点切换F1-C信令的传输路径,由此,能够保证F1-C信令的顺利传输。
第二方面的实施例中,RLF恢复的含义可以参考相关技术,例如,RLF恢复完成可以指RRC重建完成,或者是RRC重建过程中执行了选择条件切换(CHO,conditional handover)候选小区并RRC重配置完成。
第二方面的实施例中,第一网络节点可以是IAB-node,例如,图2的a)、图2的b)或图3中的IAB-node 1。
下面,以第一网络节点是IAB-node为例,针对不同场景,对第二方面的实施例进行说明。
针对图2的a)所示的场景1:
第一网络节点是新空口双连接(NR-DC)的网络节点,例如,NR-DC的IAB节点。
在操作501中,第一网络节点的主小区组(MCG)RLF恢复完成,或者,第一网络节点从MCG收到了BH RLF恢复指示。
在操作502中,第一网络节点切换F1-C信令的传输路径,包括:第一网络节点经由主小区组(MCG)通过RRC消息(例如,ULInformationTransfer消息)传输F1-C信令。即,第一网络节点使用经由MCG链路的RRC消息携带F1-C信令进行传递。
例如,第一网络节点将经由RRC信令为第一网络节点配置的第一参数值恢复成MCG RLF发生之前或者是收到BH RLF检测指示之前的配置。其中,第一参数例如是f1c-TransferPathNRDC。
例如,针对图2的a)所示的CP-UP分离的场景1,如果MCG RLF恢复完成,或者从MCG收到了BH RLF恢复指示;
NR-DC的第一网络节点(例如,图2的a)的IAB-node 1)可以使用经由MCG(例如,图2的a)的M-NG-RAN node)通过RRC消息来传输F1-C(F1-C over RRC)。例如,将f1c-TransferPathNRDC配置恢复成RLF之前或者是收到BH RLF检测指示之前的配置。
在针对图2的a)的场景1的实施例中,在定义BAP层的BH RLF相关指示的接收操作时,可以增加如下行为:
当第一网络节点从低层(即,入口BH RLC信道)收到一个关于BH RLF恢复指示的BAP控制PDU时,BAP实体的接收部分需要指示高层从某入口链路收到了BH RLF检测指示,该入口链路为收到该BAP控制PDU的入口链路。
例如,可以在TS 38.340中对BAP层标准进行增强。一个对标准的修改示例如下面的表4所示。
表4
Figure PCTCN2022075847-appb-000004
针对图3所示的场景:
第一网络节点是EN-DC的网络节点,例如,NR-DC的IAB节点。
在操作501中,第一网络节点的主小区组(MCG)RLF恢复完成。
在操作502中,第一网络节点切换F1-C信令的传输路径,包括:第一网络节点经由主小区组(MCG)通过RRC信令传输F1-C信令。例如,第一网络节点将经由RRC信令为该第一网络节点配置的第二参数值恢复成RLF之前的配置,其中,该第二参数值例如是f1c-TransferPath。
例如,针对图3所示的EN-DC的IAB-node在CP-UP分离的场景中(即,通过E-UTRA进行F1-C传递),如果MCG RLF恢复完成;
EN-DC的第一网络节点(例如,图3的IAB-node 1)节点可以选择经由MCG来通过RRC进行F1-C传输。比如将f1c-TransferPath配置恢复成RLF之前的配置。
针对图2的a)所示的场景1以及图3所示的场景,在至少一些实施例中,在定义RRC和RLF相关行为时,可以增加如下行为:
如果是NR-DC连接状态的IAB节点(即,图2的a)的IAB-node 1),当MCG RLF恢复完成时,或者是从MCG的BAP实体收到BH RLF恢复指示时,如果没有被网络重新配置的话,将f1c-TransferPathNRDC的值设为MCG RLF发生之前或者收到BH RLF检测指示之前的值;
如果是EN-DC连接状态的IAB节点(即,图3的IAB-node 1),当MCG RLF恢复完成时,如果没有被网络重新配置的话,将f1c-TransferPath的值设为MCG RLF发生之前的值。
例如,可以在TS 38.331中对RRC标准进行增强。一个对标准的修改示例如下面的表5所示。
表5
Figure PCTCN2022075847-appb-000005
针对图2的b)所示的场景2:
第一网络节点是新空口双连接(NR-DC)的网络节点,例如,NR-DC的IAB节点。
在操作501中,第一网络节点的辅小区组(SCG)RLF恢复,或者,第一网络节点从SCG收到BH RLF恢复指示。
在操作502中,第一网络节点切换F1-C信令的传输路径,包括:第一网络节点经由辅小区组(SCG)通过RRC信令传输F1-C信令。即,第一网络节点使用经由SCG链路的RRC消息携带F1-C信令进行传递。
例如,第一网络节点将经由RRC信令为第一网络节点配置的第一参数值恢复成SCG RLF之前或者收到BH RLF检测指示之前的配置,其中,第一参数例如是f1c-TransferPathNRDC。在一个具体实施方式中,针对图2的b)所示的CP-UP分离的场景2,如果SCG RLF恢复完成,或者第一网络节点(例如,IAB-node 1)从SCG收到了BH RLF恢复指示:
NR-DC的第一网络节点(例如,图2的b)的IAB-node 1)可以使用经由SCG(例如,图2的b)的S-NG-RAN node)通过RRC信令来传输F1-C(F1-C over RRC)。
在针对图2的b)的场景2的实施例中,在定义BAP层的BH RLF相关指示的接收操作时,可以增加如下行为:
当第一网络节点从低层(即,入口BH RLC信道)收到一个关于BH RLF恢复指示的BAP控制PDU时,BAP实体的接收部分需要指示高层从某入口链路收到了BH RLF恢复指示,该入口链路为收到该BAP控制PDU的入口链路。
例如,可以在TS 38.340中对BAP层标准进行增强。一个对标准的修改示例例如可以如上面的表4所示。
在针对图2的b)的场景2的实施例中,可以使用如下的方法1或者方法2来来实现操作502。
方法1:与针对图2的a)的场景1的实施例类似,即,第一网络节点回退f1c-TransferPathNRDC配置。
例如,在定义RRC的和RLF相关行为时,可以增加如下行为:
如果是作为IAB节点连接,当SCG RLF恢复完成时,或者是从SCG的BAP实体收到BH RLF恢复指示时,如果没有被网络重新配置的话,将f1c-TransferPathNRDC的值设为SCG RLF发生之前或者收到BH RLF检测指示之前的值。
可以在TS 38.331中对RRC标准进行增强。一个对标准的修改示例如下面的表6所示。
表6
Figure PCTCN2022075847-appb-000006
方法2:回退分裂的SRB2的第三参数值,第三参数例如是primaryPath。
例如,在定义RRC的和RLF相关行为时,可以增加如下行为:
如果是作为IAB节点连接,当SCG RLF恢复完成时,或者是从SCG的BAP实体收到BH RLF恢复指示时,如果SRB2被配置成分裂的SRB,pdcp-Duplication没有配置,SRB2的PDCP实体中的primaryPath指向MCG,那么将primaryPath设为指向SCG。可以在TS 38.331中对RRC标准进行增强。一个对标准的修改示例如下面的表7所示。
表7
Figure PCTCN2022075847-appb-000007
根据第二方面的实施例,在F1-C信令的传输路径从无线链路失败中恢复时,网络节点切换F1-C信令的传输路径,由此,能够保证F1-C信令的顺利传输。
第三方面的实施例
第三方面的实施例提供一种收发信号的装置。该装置应用于第一网络节点。该装置可以是第一网络节点,该装置也可以是第一网络节点的一部分单元。该装置对应于第一方面的实施例的方法。
图6是本申请实施例的收发信号的装置信号的一示意图,如图6所示,收发信号的装置600包括:第一处理单元601和第一切换单元602。
第一处理单元601其检测到F1-C信令的传输路径发生了无线链路失败(RLF)或者收到了回传无线链路失败(BH RLF)检测指示;以及
第一切换单元602使第一网络节点切换F1-C信令的传输路径。
在至少一个实施例中,第一网络节点是新空口双连接(NR-DC)的网络节点,第一处理单元601检测到发生了主小区组(MCG)RLF,或者,第一处理单元601从MCG收到BH RLF检测指示。其中,第一网络节点切换F1-C信令的传输路径,包括:第一网络节点经由辅小区组(SCG)通过回传适应协议(BAP)层传输F1-C信令。例如,第一网络节点选择或修改经由RRC信令为第一网络节点配置的第一参数值, 第一参数值用于指定F1-C信令的传输路径。具体地,在第一参数指示MCG的情况下,将第一参数设置为指示SCG。
在至少一个实施例中,第一网络节点是EN-DC(E-UTRA-NR Dual Connectivity)的网络节点,第一处理单元检测到发生了主小区组(MCG)RLF。其中,第一网络节点切换F1-C信令的传输路径,包括:第一网络节点经由辅小区组(SCG)通过回传适应协议(BAP)层传输F1-C信令。例如,第一网络节点选择或修改经由RRC信令为第一网络节点配置的第二参数值,第二参数值用于指定F1-C信令的传输路径。具体地,在第二参数指示长期演进(lte)的情况下,将第二参数设置为指示新无线(nr)。
在至少一个实施例中,第一网络节点是新空口双连接(NR-DC)的网络节点,第一处理单元检测到发生了辅小区组(SCG)RLF,或者,第一处理单元601从SCG收到BH RLF检测指示。其中,第一网络节点切换F1-C信令的传输路径,包括:第一网络节点经由主小区组(MCG)通过回传适应协议(BAP)层传输F1-C信令。其中,第一网络节点选择或修改经由RRC信令为第一网络节点配置的第一参数值,第一参数值用于指定F1-C信令的传输路径。例如,在第一参数指示SCG的情况下,将第一参数设置为指示MCG。
例如,第一网络节点修改经由RRC配置的分裂的SRB2的PDCP实体中的第三参数值。具体地,在SRB2被配置成分裂的SRB,分组数据汇聚协议重复(pdcp-Duplication)没有配置,SRB2的PDCP实体中的第三参数指向SCG的情况下,第一网络节点将第三参数设为指向MCG。
第一网络节点从低层收到关于BH RLF检测指示的BAP控制协议数据单元(PDU)时,BAP实体的接收部分指示高层收到了BH RLF检测指示,以及收到该BAP控制PDU的入口链路。
第四方面的实施例
第四方面的实施例提供一种收发信号的装置。该装置应用于第一网络节点。该装置可以是第一网络节点,该装置也可以是第一网络节点的一部分单元。该装置对应于第二方面的实施例的方法。
图7是本申请实施例的收发信号的装置的一示意图,如图7所示,收发信号的装置700包括:第二切换单元701。
在无线链路失败(RLF)恢复完成或者该第一网络节点收到了回传无线链路失败(BH RLF)恢复指示的情况下,第二切换单元701使第一网络节点切换F1-C信令的传输路径。
在至少一个实施例中,该第一网络节点是新空口双连接(NR-DC)的网络节点,该第一网络节点的主小区组(MCG)RLF恢复完成,或者,该第一网络节点从MCG收到该BH RLF恢复指示。其中,该第一网络节点切换F1-C信令的传输路径,包括:该第一网络节点切换为经由主小区组(MCG)通过RRC消息传输F1-C信令。例如,该第一网络节点将经由RRC信令为该第一网络节点配置的第一参数值恢复成MCG RLF发生之前或者是收到BH RLF检测指示之前的配置,该第一参数值用于指定F1-C信令的传输路径。具体地,如果该第一参数没有被RRC信令再次配置,将该第一参数的值设为MCG RLF发生之前或者收到BH RLF检测指示之前的值。
在至少一个实施例中,该第一网络节点是EN-DC(E-UTRA-NR Dual Connectivity)的网络节点,该第一网络节点的主小区组(MCG)RLF恢复完成。其中,该第一网络节点切换F1-C信令的传输路径,包括:该第一网络节点经由主小区组(MCG)通过RRC信令传输F1-C信令。例如,该第一网络节点将经由RRC信令为该第一网络节点配置的第二参数值恢复成RLF之前的配置,该第二参数值用于指定F1-C信令的传输路径。具体地,如果该第二参数没有被RRC信令再次配置,将该第二参数的值设为MCG RLF发生之前的值。
在至少一个实施例中,该第一网络节点是新空口双连接(NR-DC)的网络节点,该第一网络节点的辅小区组(SCG)RLF恢复,或者,该第一网络节点从SCG收到该BH RLF恢复指示。其中,该第一网络节点切换F1-C信令的传输路径,包括:该第一网络节点经由辅小区组(SCG)通过RRC信令传输F1-C信令。例如,该第一网络节点将经由RRC信令为该第一网络节点配置的第一参数值恢复成SCG RLF之前或者收到BH RLF检测指示之前的配置,该第一参数值用于指定F1-C信令的传输路径。具体地,如果该第一参数没有被RRC信令再次配置,将该第一参数的值设为SCG RLF发生之前或者收到BH RLF检测指示之前的值。
在一个实施方式中,第一网络节点还可以修改经由RRC配置的分裂的SRB2的PDCP实体中的第三参数值。例如,在SRB2被配置成分裂的SRB,分组数据汇聚协 议重复(pdcp-Duplication)没有配置,SRB2的PDCP实体中的该第三参数指向MCG的情况下,该第一网络节点将该第三参数设为指向SCG。
该第一网络节点从低层收到关于该BH RLF恢复指示的BAP控制协议数据单元(PDU)时,BAP实体的接收部分指示高层收到了该BH RLF恢复指示,以及收到该BAP控制PDU的入口链路。
第五方面的实施例
本申请实施例还提供一种通信系统,该通信系统可以包括第一网络节点。该第一网络节点可以是IAB-node,例如,图2或图3的IAB-node 1。
图8是本申请实施例的第一网络节点的一个构成示意图。如图8所示,第一网络节点800可以包括:处理器810(例如中央处理器CPU)和存储器820;存储器820耦合到处理器810。其中该存储器820可存储各种数据;此外还存储信息处理的程序830,并且在处理器810的控制下执行该程序830。
例如,处理器810可以被配置为执行程序而实现如第一方面的实施例或第二方面的实施例中由IAB-node执行的方法。
此外,如图8所示,第一网络节点800还可以包括:收发机840和天线850等;其中,上述部件的功能与现有技术类似,此处不再赘述。值得注意的是,第一网络节点800也并不是必须要包括图8中所示的所有部件;此外,第一网络节点800还可以包括图8中没有示出的部件,可以参考现有技术。
本申请实施例还提供一种计算机程序,其中当在第一网络节点中执行所述程序时,所述程序使得所述第一网络节点执行第一方面或第二方面的实施例所述的方法。
本申请实施例还提供一种存储有计算机程序的存储介质,其中所述计算机程序使得第一网络节点执行第一方面或第二方面的实施例所述的方法。
本申请以上的装置和方法可以由硬件实现,也可以由硬件结合软件实现。本申请涉及这样的计算机可读程序,当该程序被逻辑部件所执行时,能够使该逻辑部件实现上文所述的装置或构成部件,或使该逻辑部件实现上文所述的各种方法或步骤。本申请还涉及用于存储以上程序的存储介质,如硬盘、磁盘、光盘、DVD、flash存储器等。
结合本申请实施例描述的方法/装置可直接体现为硬件、由处理器执行的软件模块或二者组合。例如,图中所示的功能框图中的一个或多个和/或功能框图的一个或 多个组合,既可以对应于计算机程序流程的各个软件模块,亦可以对应于各个硬件模块。这些软件模块,可以分别对应于图中所示的各个步骤。这些硬件模块例如可利用现场可编程门阵列(FPGA)将这些软件模块固化而实现。
软件模块可以位于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动磁盘、CD-ROM或者本领域已知的任何其它形式的存储介质。可以将一种存储介质耦接至处理器,从而使处理器能够从该存储介质读取信息,且可向该存储介质写入信息;或者该存储介质可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。该软件模块可以存储在移动终端的存储器中,也可以存储在可插入移动终端的存储卡中。例如,若设备(如移动终端)采用的是较大容量的MEGA-SIM卡或者大容量的闪存装置,则该软件模块可存储在该MEGA-SIM卡或者大容量的闪存装置中。
针对附图中描述的功能方框中的一个或多个和/或功能方框的一个或多个组合,可以实现为用于执行本申请所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图描述的功能方框中的一个或多个和/或功能方框的一个或多个组合,还可以实现为计算设备的组合,例如,DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处理器或者任何其它这种配置。
以上结合具体的实施方式对本申请进行了描述,但本领域技术人员应该清楚,这些描述都是示例性的,并不是对本申请保护范围的限制。本领域技术人员可以根据本申请的精神和原理对本申请做出各种变型和修改,这些变型和修改也在本申请的范围内。
关于包括以上实施例的实施方式,还公开下述的附记:
1.一种收发信号的方法,应用于第一网络节点,该方法包括:
所述第一网络节点检测到F1-C信令的传输路径发生了无线链路失败(RLF)或者收到了回传无线链路失败(BH RLF)检测指示;以及
所述第一网络节点切换F1-C信令的传输路径。
2.如附记1所述的方法,其中,
所述第一网络节点是新空口双连接(NR-DC)的网络节点,
所述第一网络节点检测到发生了主小区组(MCG)RLF,或者,所述第一网络节点从MCG收到所述BH RLF检测指示。
3.如附记2所述的方法,其中,
所述第一网络节点切换F1-C信令的传输路径,包括:
所述第一网络节点经由辅小区组(SCG)通过回传适应协议(BAP)层传输F1-C信令。
4.如附记3所述的方法,其中,
所述第一网络节点选择或修改经由RRC信令为所述第一网络节点配置的第一参数值,所述第一参数值用于指定F1-C信令的传输路径。
5.如附记1所述的方法,其中,
所述第一网络节点是EN-DC(E-UTRA-NR Dual Connectivity)的网络节点,
所述第一网络节点检测到发生了主小区组(MCG)RLF。
6.如附记5所述的方法,其中,
所述第一网络节点切换F1-C信令的传输路径,包括:
所述第一网络节点经由辅小区组(SCG)通过回传适应协议(BAP)层传输F1-C信令。
7.如附记6所述的方法,其中,
所述第一网络节点选择或修改经由RRC信令为所述第一网络节点配置的第二参数值,所述第二参数值用于指定F1-C信令的传输路径。
8.如附记4所述的方法,其中,
在所述第一参数指示MCG的情况下,将所述第一参数设置为指示SCG。
9.如附记7所述的方法,其中,
在所述第二参数指示长期演进(lte)的情况下,将所述第二参数设置为指示新无线(nr)。
10.如附记1所述的方法,其中,
所述第一网络节点是新空口双连接(NR-DC)的网络节点,
所述第一网络节点检测到发生了辅小区组(SCG)RLF,或者,所述第一网络节点从SCG收到所述BH RLF检测指示。
11.如附记10所述的方法,其中,
所述第一网络节点切换F1-C信令的传输路径,包括:
所述第一网络节点经由主小区组(MCG)通过回传适应协议(BAP)层传输F1-C信令。
12.如附记11所述的方法,其中,
所述第一网络节点选择或修改经由RRC信令为所述第一网络节点配置的第一参数值,所述第一参数值用于指定F1-C信令的传输路径。
13.如权利要12所述的方法,其中,
在所述第一参数指示SCG的情况下,将所述第一参数设置为指示MCG。
14.如附记10所述的方法,其中,
所述第一网络节点修改经由RRC配置的分裂的SRB2的PDCP实体中的第三参数值。
15.如附记14所述的方法,其中,
在SRB2被配置成分裂的SRB,分组数据汇聚协议重复(pdcp-Duplication)没有配置,SRB2的PDCP实体中的所述第三参数指向SCG的情况下,所述第一网络节点将所述第三参数设为指向MCG。
16.如附记2~4,8,10~15中任一项所述的方法,其中,
所述第一网络节点从低层收到关于所述BH RLF检测指示的BAP控制协议数据单元(PDU)时,BAP实体的接收部分指示高层收到了所述BH RLF检测指示,以及收到该BAP控制PDU的入口链路。
17.一种收发信号的方法,应用于第一网络节点,所述方法包括:
所述第一网络节点从低层收到关于回传无线链路失败(BH RLF)检测指示的BAP控制协议数据单元(PDU);以及
BAP实体的接收部分指示高层收到了所述BH RLF检测指示,以及收到该BAP控制PDU的入口链路。
18.一种收发信号的方法,应用于第一网络节点,该方法包括:
无线链路失败(RLF)恢复完成或者所述第一网络节点收到了回传无线链路失败(BH RLF)恢复指示;以及
所述第一网络节点切换F1-C信令的传输路径。
19.如附记18所述的方法,其中,
所述第一网络节点是新空口双连接(NR-DC)的网络节点,
所述第一网络节点的主小区组(MCG)RLF恢复完成,或者,所述第一网络节点从MCG收到所述BH RLF恢复指示。
20.如附记19所述的方法,其中,
所述第一网络节点切换F1-C信令的传输路径,包括:
所述第一网络节点切换为经由主小区组(MCG)通过RRC消息传输F1-C信令。
21.如附记20所述的方法,其中,
所述第一网络节点将经由RRC信令为所述第一网络节点配置的第一参数值恢复成MCG RLF发生之前或者是收到BH RLF检测指示之前的配置,所述第一参数值用于指定F1-C信令的传输路径。
22.如附记18所述的方法,其中,
所述第一网络节点是EN-DC(E-UTRA-NR Dual Connectivity)的网络节点,
所述第一网络节点的主小区组(MCG)RLF恢复完成。
23.如附记22所述的方法,其中,
所述第一网络节点切换F1-C信令的传输路径,包括:
所述第一网络节点经由主小区组(MCG)通过RRC信令传输F1-C信令。
24.如附记23所述的方法,其中,
所述第一网络节点将经由RRC信令为所述第一网络节点配置的第二参数值恢复成RLF之前的配置,所述第二参数值用于指定F1-C信令的传输路径。
25.如附记21所述的方法,其中,
如果所述第一参数没有被RRC信令再次配置,将所述第一参数的值设为MCG RLF发生之前或者收到BH RLF检测指示之前的值。
26.如附记24所述的方法,其中,
如果所述第二参数没有被RRC信令再次配置,将所述第二参数的值设为MCG RLF发生之前的值。
27.如附记18所述的方法,其中,
所述第一网络节点是新空口双连接(NR-DC)的网络节点,
所述第一网络节点的辅小区组(SCG)RLF恢复,或者,所述第一网络节点从SCG收到所述BH RLF恢复指示。
28.如附记27所述的方法,其中,
所述第一网络节点切换F1-C信令的传输路径,包括:
所述第一网络节点经由辅小区组(SCG)通过RRC信令传输F1-C信令。
29.如附记28所述的方法,其中,
所述第一网络节点将经由RRC信令为所述第一网络节点配置的第一参数值恢复成SCG RLF之前或者收到BH RLF检测指示之前的配置,所述第一参数值用于指定F1-C信令的传输路径。
30.如权利要29所述的方法,其中,
如果所述第一参数没有被RRC信令再次配置,将所述第一参数的值设为SCG RLF发生之前或者收到BH RLF检测指示之前的值。
31.如附记27所述的方法,其中,
所述第一网络节点修改经由RRC配置的分裂的SRB2的PDCP实体中的第三参数值。
32.如附记31所述的方法,其中,
在SRB2被配置成分裂的SRB,分组数据汇聚协议重复(pdcp-Duplication)没有配置,SRB2的PDCP实体中的所述第三参数指向MCG的情况下,所述第一网络节点将所述第三参数设为指向SCG。
33.如附记19~21,25,27~32中任一项所述的方法,其中,
所述第一网络节点从低层收到关于所述BH RLF恢复指示的BAP控制协议数据单元(PDU)时,BAP实体的接收部分指示高层收到了所述BH RLF恢复指示,以及收到该BAP控制PDU的入口链路。
34.一种收发信号的方法,应用于第一网络节点,所述方法包括:
所述第一网络节点从低层收到关于回传无线链路失败(BH RLF)恢复指示的BAP控制协议数据单元(PDU);以及
BAP实体的接收部分指示高层收到了所述BH RLF恢复指示,以及收到该BAP控制PDU的入口链路。

Claims (20)

  1. 一种收发信号的装置,应用于第一网络节点,该装置包括:
    第一处理单元,其检测到F1-C信令的传输路径发生了无线链路失败(RLF)或者收到了回传无线链路失败(BH RLF)检测指示;以及
    第一切换单元,其使所述第一网络节点切换F1-C信令的传输路径。
  2. 如权利要求1所述的装置,其中,
    所述第一处理单元检测到发生了主小区组(MCG)RLF,或者,所述第一处理单元从MCG收到所述BH RLF检测指示。
  3. 如权利要求2所述的装置,其中,
    所述第一网络节点选择或修改经由RRC信令为所述第一网络节点配置的第一参数值,所述第一参数值用于指定F1-C信令的传输路径。
  4. 如权利要求2所述的装置,其中,
    所述第一网络节点选择或修改经由RRC信令为所述第一网络节点配置的第二参数值,所述第二参数值用于指定F1-C信令的传输路径。
  5. 如权利要求3所述的装置,其中,
    在所述第一参数指示MCG的情况下,将所述第一参数设置为指示SCG。
  6. 如权利要求4所述的装置,其中,
    在所述第二参数指示长期演进(lte)的情况下,将所述第二参数设置为指示新无线(nr)。
  7. 如权利要求1所述的装置,其中,
    所述第一处理单元检测到发生了辅小区组(SCG)RLF,或者,所述第一处理单元从SCG收到所述BH RLF检测指示。
  8. 如权利要求7所述的装置,其中,
    所述第一网络节点选择或修改经由RRC信令为所述第一网络节点配置的第一参数值,所述第一参数值用于指定F1-C信令的传输路径。
  9. 如权利要8所述的装置,其中,
    在所述第一参数指示SCG的情况下,将所述第一参数设置为指示MCG。
  10. 如权利要求7所述的装置,其中,
    所述第一网络节点修改经由RRC配置的分裂的SRB2的PDCP实体中的第三参 数值。
  11. 如权利要求10所述的装置,其中,
    在SRB2被配置成分裂的SRB,分组数据汇聚协议重复(pdcp-Duplication)没有配置,SRB2的PDCP实体中的所述第三参数指向SCG的情况下,所述第一网络节点将所述第三参数设为指向MCG。
  12. 如权利要求1所述的装置,其中,
    所述第一网络节点从低层收到关于所述BH RLF检测指示的BAP控制协议数据单元(PDU)时,BAP实体的接收部分指示高层收到了所述BH RLF检测指示,以及收到该BAP控制PDU的入口链路。
  13. 一种收发信号的装置,应用于第一网络节点,该装置包括:
    第二切换单元,在无线链路失败(RLF)恢复完成或者所述第一网络节点收到了回传无线链路失败(BH RLF)恢复指示的情况下,所述第二切换单元使第一网络节点切换F1-C信令的传输路径。
  14. 如权利要求13所述的装置,其中,
    所述第一网络节点的主小区组(MCG)RLF恢复完成,或者,所述第一网络节点从MCG收到所述BH RLF恢复指示。
  15. 如权利要求14所述的装置,其中,
    所述第一网络节点将经由RRC信令为所述第一网络节点配置的第一参数值恢复成MCG RLF发生之前或者是收到BH RLF检测指示之前的配置,所述第一参数值用于指定F1-C信令的传输路径。
  16. 如权利要求14所述的装置,其中,
    所述第一网络节点将经由RRC信令为所述第一网络节点配置的第二参数值恢复成RLF之前的配置,所述第二参数值用于指定F1-C信令的传输路径。
  17. 如权利要求13所述的装置,其中,
    所述第一网络节点的辅小区组(SCG)RLF恢复,或者,所述第一网络节点从SCG收到所述BH RLF恢复指示。
  18. 如权利要求17所述的装置,其中,
    所述第一网络节点将经由RRC信令为所述第一网络节点配置的第一参数值恢复成SCG RLF之前或者收到BH RLF检测指示之前的配置,所述第一参数值用于指定 F1-C信令的传输路径。
  19. 如权利要求17所述的装置,其中,
    所述第一网络节点修改经由RRC配置的分裂的SRB2的PDCP实体中的第三参数值。
  20. 如权利要求13所述的装置,其中,
    所述第一网络节点从低层收到关于所述BH RLF恢复指示的BAP控制协议数据单元(PDU)时,BAP实体的接收部分指示高层收到了所述BH RLF恢复指示,以及收到该BAP控制PDU的入口链路。
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110536351A (zh) * 2019-02-15 2019-12-03 中兴通讯股份有限公司 Iab网络中信息处理方法、iab及计算机存储介质
CN113556794A (zh) * 2020-04-23 2021-10-26 华为技术有限公司 通信方法、装置及系统

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110536351A (zh) * 2019-02-15 2019-12-03 中兴通讯股份有限公司 Iab网络中信息处理方法、iab及计算机存储介质
CN113556794A (zh) * 2020-04-23 2021-10-26 华为技术有限公司 通信方法、装置及系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FUJITSU: "Control plane behavior upon receiving BH RLF detection indication", 3GPP DRAFT; R2-2200562, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Online; 20220117 - 20220125, 11 January 2022 (2022-01-11), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052093710 *

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