WO2023010299A1 - 触发生成回传链路无线链路失败通知的方法及装置 - Google Patents

触发生成回传链路无线链路失败通知的方法及装置 Download PDF

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Publication number
WO2023010299A1
WO2023010299A1 PCT/CN2021/110408 CN2021110408W WO2023010299A1 WO 2023010299 A1 WO2023010299 A1 WO 2023010299A1 CN 2021110408 W CN2021110408 W CN 2021110408W WO 2023010299 A1 WO2023010299 A1 WO 2023010299A1
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WIPO (PCT)
Prior art keywords
node
timer
link failure
failure notification
iab
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PCT/CN2021/110408
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English (en)
French (fr)
Inventor
贾美艺
易粟
李国荣
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Fujitsu Ltd
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Fujitsu Ltd
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Priority to PCT/CN2021/110408 priority Critical patent/WO2023010299A1/zh
Priority to CN202180101212.7A priority patent/CN117751601A/zh
Publication of WO2023010299A1 publication Critical patent/WO2023010299A1/zh
Priority to US18/430,127 priority patent/US20240259907A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0019Control or signalling for completing the hand-off for data sessions of end-to-end connection adapted for mobile IP [MIP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/04Arrangements for maintaining operational condition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0069Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837Determination of triggering parameters for hand-off
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/30Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/305Handover due to radio link failure

Definitions

  • the present invention relates to the field of communication.
  • IAB Integrated access and backhaul
  • a relay node namely an IAB node (IAB-node)
  • IAB-node supports NR access and backhauling.
  • Backhaul can include a single hop or multiple hops.
  • the end point of the NR backhaul on the network side that is, the IAB donor (IAB-donor), indicates a gNB including additional functions supporting the IAB.
  • An IAB host may also be referred to as an IAB host node.
  • the IAB node supports the function of gNB-DU (Distributed Unit, distribution unit), that is, IAB-DU.
  • the IAB-DU terminates the NR access interface to the terminal device and the next-hop IAB node, and terminates the F1 protocol to the gNB-CU function on the IAB host.
  • an IAB node also supports a subset of terminal equipment functions (UE functions), namely IAB-MT, which includes, for example, a gNB-CU connected to an IAB host of a gNB-DU connected to another IAB node or an IAB host (Centralized Unit, centralized unit) and the physical layer, layer 2 (L2), RRC (Radio Resource Control, radio resource control) and NAS (Non-Access-Stratum, non-access stratum) functions connected to the core network.
  • UE functions terminal equipment functions
  • An IAB node is connected to an IAB host through one or more hops.
  • the IAB host is the root node
  • the adjacent nodes on the IAB-DU interface of the IAB node are called the descendant nodes of the IAB node, that is, the descendant IAB-node.
  • the adjacent node on the MT interface is called the parent node (parent node), that is, the parent IAB node (parent IAB-node).
  • Radio Link Failure Radio Link Failure
  • BH link backhaul link
  • BH RLF backhaul link radio link failure
  • BH RLF notifications or indications may include the following:
  • BH link RLF notifications or instructions include the following 4 types:
  • Type 1 "Plain" notification, that is, the child IAB node detects the indication that the wireless link of the backhaul link fails
  • Type 2 Attempt to recover, that is, the sub-IAB node detects that the wireless link of the backhaul link fails, and the sub-IAB node is trying to recover from the failure indication;
  • Type 3 The wireless link failure of the backhaul link has been recovered, that is, the indication that the backhaul link has successfully recovered from the wireless link failure;
  • Type 4/4X recovery failure/instruct the child node to perform the wireless link failure process, that is, the indication of the return link wireless link failure recovery failure, when the parent IAB node sends this indication is based on implementation, when receiving this indication
  • the child IAB node should perform the procedures related to the failure of the wireless link;
  • the IAB node can send a backhaul link radio link failure (BH RLF) notification or indication to its child nodes.
  • BH RLF backhaul link radio link failure
  • the BH RLF notification or indication here refers to the above Type 4 /4X backhaul link wireless link failure notification or indication;
  • a type 2 RLF indication is triggered.
  • the type 2 RLF notification or indication here refers to the above Type 1 or Type 2 backhaul link radio link failure notification or indication.
  • a terminal device or IAB-MT considers a radio link failure to be detected when one of the following conditions is met:
  • the BAP entity If connected as an IAB node, the BAP entity receives the BH RLF indication
  • the terminal device or IAB-MT When the terminal device or IAB-MT is not configured with Dual Connectivity (DC), or the terminal device or IAB-MT is configured with DC and the above conditions occur in the primary cell group (MCG) or secondary cell (PCell), the terminal device or IAB-MT thinks that MCG has detected RLF; if the terminal equipment or IAB-MT is configured with DC and the above conditions occur in the secondary cell group (SCG) or primary secondary cell (PSCell), the terminal equipment or IAB-MT thinks that SCG has detected RLF .
  • DC Dual Connectivity
  • SCG secondary cell group
  • PSCell primary secondary cell
  • DAPS HO dual-active protocol stack handover
  • a type 2 RLF indication is triggered, and when the above RLF is detected, including MCG RLF, SCG RLF, source RLF and target RLF, a type 2 radio link failure notification or indication is triggered .
  • the inventors have found that, according to the current mechanism, a variety of situations will trigger the generation of a type 2 wireless link failure notification or indication. This may cause a type 2 radio link failure notification or indication storm.
  • type 2 wireless link failure notifications or indications may be sent through BAP control PDUs.
  • BAP control PDUs are generated by IAB nodes and have no security protection. There are security issues. Type 2 wireless link failure notifications or indications increase the occurrence of storms Possibility of security issues.
  • embodiments of the present application provide a method and device for triggering generation of a backhaul link wireless link failure notification.
  • RLF indication storm can be avoided, resource overhead and security risk can be reduced.
  • an apparatus for triggering the generation of a radio link failure notification of a backhaul link the apparatus is applied to a first node, and the apparatus includes: when a radio link failure is detected , and when the first condition is met and/or based on the state of the timer, trigger or not trigger the generation of the backhaul link wireless link failure notification; or, based on the state of the timer, trigger or not trigger the generation of the backhaul link wireless link A link failure notification, or, when the first condition is met, triggering or not triggering generation of a backhaul link radio link failure notification based on the state of the timer.
  • an apparatus for triggering the generation of a backhaul link radio link failure notification the apparatus is applied to a first node, and the apparatus includes: when the second condition is met, triggering Generate a wireless link failure notification of the backhaul link, or, when a second condition is met, trigger or not trigger the generation of a wireless link failure notification of the backhaul link based on the state of the timer, the second condition includes the following At least one of: the first timer expires; the second timer expires; RRC connection reconfiguration fails; and an integrity check failure indication is received from a lower layer.
  • a network device is a first node, and the network device includes the apparatus according to the first aspect or the second aspect of the embodiments of the present application.
  • a communication system is provided, where the communication system includes the network device according to the third aspect of the embodiments of the present application.
  • a method for triggering the generation of a wireless link failure notification of a backhaul link the method is applied to a first node, and the method includes: when a wireless link failure is detected , and when the first condition is met and/or based on the state of the timer, trigger or not trigger the generation of the backhaul link wireless link failure notification; or, based on the state of the timer, trigger or not trigger the generation of the backhaul link wireless link A link failure notification, or, when the first condition is met, triggering or not triggering generation of a backhaul link radio link failure notification based on the state of the timer.
  • a method for triggering the generation of a backhaul link wireless link failure notification is applied to the first node, and the method includes: when the second condition is met, triggering Generate a wireless link failure notification of the backhaul link, or, when a second condition is met, trigger or not trigger the generation of a wireless link failure notification of the backhaul link based on the state of the timer, the second condition includes the following At least one of: the first timer expires; the second timer expires; RRC connection reconfiguration fails; and an integrity check failure indication is received from a lower layer.
  • a computer-readable program wherein when the program is executed in the device or network device that triggers the generation of the wireless link failure notification of the backhaul link, the The above program enables the device or network device that triggers the generation of the wireless link failure notification of the backhaul link to perform the method of triggering the generation of the wireless link failure notification of the backhaul link described in the fifth aspect or the sixth aspect of the embodiment of this application .
  • a storage medium storing a computer-readable program, wherein the computer-readable program causes a device or network device that triggers the generation of a backhaul link wireless link failure notification to execute this The method for triggering the generation of the wireless link failure notification of the backhaul link described in the fifth aspect or the sixth aspect of the application embodiment.
  • One of the beneficial effects of the embodiments of the present application is: when a wireless link failure is detected, and when the first condition is met and/or based on the state of the timer, triggering or not triggering the generation of a backhaul link wireless link failure notification ; or, based on the state of the timer, trigger or not trigger the generation of the wireless link failure notification of the backhaul link; or, when the first condition is met, trigger or not trigger the generation of the wireless link of the backhaul link based on the state of the timer Road failure notification.
  • RLF indication storm can be avoided, resource overhead can be reduced, and security risks can be reduced.
  • Fig. 1 is a schematic diagram of the overall structure of the IAB of the embodiment of the present application.
  • Fig. 2 is another schematic diagram of the overall structure of the IAB of the embodiment of the present application.
  • Fig. 3 is a schematic diagram of the protocol stack of the F1-U interface between IAB-DU and IAB-donor-CU;
  • Fig. 4 is a schematic diagram of the protocol stack of the F1-C interface between the IAB-DU and the IAB-donor-CU;
  • 5 is a schematic diagram of the protocol stack of the SRB between the IAB-MT and the IAB-donor-CU of the embodiment of the present application;
  • FIG. 6 is a schematic diagram of a single connection scenario in SA mode in an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a dual connectivity scenario in EN-DC mode according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a dual connectivity scenario in NR-DC mode according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a method for triggering and generating a wireless link failure notification of a backhaul link according to Embodiment 1 of the present application.
  • FIG. 10 is another schematic diagram of the method for triggering the generation of a backhaul link radio link failure notification according to Embodiment 1 of the present application;
  • FIG. 11 is another schematic diagram of the method for triggering the generation of a backhaul link wireless link failure notification according to Embodiment 1 of the present application;
  • FIG. 12 is another schematic diagram of the method for triggering the generation of a backhaul link radio link failure notification according to Embodiment 1 of the present application;
  • FIG. 13 is a schematic diagram of a method for triggering and generating a wireless link failure notification of a backhaul link according to Embodiment 2 of the present application;
  • FIG. 14 is a schematic diagram of a method for triggering and generating a backhaul link wireless link failure notification according to Embodiment 3 of the present application;
  • FIG. 15 is a schematic diagram of a method for triggering and generating a backhaul link wireless link failure notification according to Embodiment 3 of the present application;
  • FIG. 16 is a schematic diagram of a method for triggering and generating a backhaul link wireless link failure notification according to Embodiment 3 of the present application;
  • FIG. 17 is a schematic diagram of a method for triggering and generating a wireless link failure notification of a backhaul link according to Embodiment 3 of the present application;
  • FIG. 18 is a schematic diagram of a method for triggering and generating a backhaul link wireless link failure notification according to Embodiment 3 of the present application;
  • FIG. 19 is a schematic diagram of an apparatus for triggering and generating a wireless link failure notification of a backhaul link according to Embodiment 4 of the present application;
  • FIG. 20 is a schematic diagram of the first trigger unit of Embodiment 4 of the present application.
  • Fig. 21 is a schematic diagram of the second trigger unit of Embodiment 4 of the present application.
  • FIG. 22 is a schematic diagram of an apparatus for triggering and generating a wireless link failure notification of a backhaul link according to Embodiment 5 of the present application;
  • FIG. 23 is a schematic block diagram of the system configuration of the network device according to Embodiment 6 of the present application.
  • FIG. 24 is a schematic block diagram of a system configuration of a network device according to Embodiment 7 of the present application.
  • FIG. 25 is a schematic diagram of a communication system according to Embodiment 8 of the present application.
  • FIG. 26 is another schematic diagram of the communication system according to Embodiment 8 of the present application.
  • Fig. 27 is another schematic diagram of the communication system according to Embodiment 8 of the present application.
  • 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 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.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution
  • LTE-A Long Term Evolution-A
  • LTE- Advanced Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • High-Speed Packet Access High-Speed Packet Access
  • the communication between devices in the communication system can be carried out according to any stage of communication protocol, for example, it can include but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and future 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 user equipment to a communication network and provides services for the user equipment.
  • Network devices may include but are not limited to the following devices: “node” and/or “donor” under the IAB architecture, 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.
  • 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 node (such as femto, pico, etc.).
  • NodeB Node B
  • eNodeB or eNB evolved Node B
  • gNB 5G base station
  • RRH Remote Radio Head
  • RRU Remote Radio Unit
  • relay relay
  • low-power node such as femto, 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” refers to, for example, a device that accesses a communication network through a network device and receives network services, and may also be called “Terminal Equipment” (TE, Terminal Equipment).
  • 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, etc.
  • MS mobile station
  • SS subscriber station
  • AT Access Terminal
  • a station a station
  • 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
  • FIG. 1 is a schematic diagram of the overall architecture of the IAB in the embodiment of the present application.
  • the overall architecture of the IAB uses an independent (standalone, SA) mode
  • FIG. 2 is another schematic diagram of the overall architecture of the IAB in the embodiment of the present application.
  • the overall architecture of the IAB uses a dual connection (EN-DC) mode. In the dual connection mode, the IAB node is connected to a MeNB through E-UTRA, and the IAB host acts as the SgNB to terminate the X2-C.
  • EN-DC dual connection
  • Fig. 3 is a schematic diagram of the protocol stack of the F1-U interface between IAB-DU and IAB-donor-CU
  • Fig. 4 is a schematic diagram of the protocol stack of the F1-C interface between IAB-DU and IAB-donor-CU, in Fig. 3 and 4, F1-U and F1-C take 2-hop backhaul as an example for illustration.
  • F1-U and F1-C use the IP transport layer between IAB-DU and IAB-donor-CU, and in addition, F1-U and F1-C have security protection.
  • the IP layer is transmitted through the sublayer of the Backhaul Adaptation Protocol (BAP) to ensure multi-hop routing; the IP layer can also be used for non-F1 services, such as operation Maintenance management (Operation Administration and Maintenance, OAM) business.
  • BAP Backhaul Adaptation Protocol
  • OAM operation Maintenance management
  • BAP PDUs are transmitted by BH RLC channel (channel); on each BH link (BH link), multiple BH RLC channels can be configured , which allows traffic prioritization and QoS (Quality of Service) enforcement.
  • QoS Quality of Service
  • each IAB node and the BAP entity on the IAB-donor-DU perform BH RLC channel mapping of BAP PDUs.
  • FIG. 5 is a schematic diagram of the protocol stack of the SRB between the IAB-MT and the IAB-donor-CU according to the embodiment of the present application.
  • the IAB-MT also establishes one or more DRBs with the IAB-donor-CU, which can be used, for example, to transmit OAM services.
  • DRBs For SA mode, the establishment of DRBs is optional. These SRBs and DRBs are transmitted between this IAB-MT and its parent node via the Uu interface channel.
  • FIG. 6 is a schematic diagram of a single connection scenario in SA mode according to an embodiment of the present application.
  • the first IAB node uses a single connection to connect to the IAB host node, and the first IAB node detects the wireless link of the backhaul link between it and the parent IAB node, that is, the IAB host node way failed.
  • FIG. 7 is a schematic diagram of a dual connectivity scenario in EN-DC mode according to an embodiment of the present application.
  • the first IAB node can access the network through the IAB host node and the MeNB.
  • the backhauling service on the E-UTRA radio interface is not supported.
  • the first IAB node detects the MCG RLF with the MeNB
  • the first IAB node detects the SCG RLF with the IAB host node.
  • Fig. 8 is a schematic diagram of a dual connectivity scenario in NR-DC mode according to an embodiment of the present application.
  • the first IAB node can access the network through two parent IAB nodes, that is, the third IAB node and the fourth IAB node, the third IAB node is the master node, and the fourth IAB node The node is a child node.
  • the first IAB node detects the MCG RLF between the third IAB node
  • the SCG RLF between the first IAB node and the fourth IAB node is detected.
  • the embodiment of the present application provides a method for triggering the generation of a radio link failure notification of a backhaul link, and the method is used for a first IAB node.
  • FIG. 9 is a schematic diagram of a method for triggering generation of a wireless link failure notification of a backhaul link according to Embodiment 1 of the present application. As shown in Figure 9, the method includes:
  • Step 901 When a wireless link failure is detected, and when the first condition is met and/or based on the state of the timer, trigger or not trigger generation of a backhaul link wireless link failure notification; or,
  • Step 902 Based on the status of the timer, trigger or not trigger the generation of a backhaul link radio link failure notification; or,
  • Step 903 When the first condition is satisfied, based on the status of the timer, trigger or not trigger generation of a backhaul link wireless link failure notification.
  • the radio link failure may be a radio link failure of the backhaul link.
  • the backhaul link refers to the backhaul link between the IAB node and its parent IAB node
  • the wireless link failure of the backhaul link can be triggered by various reasons, for example, the timer T310 in the primary cell of the IAB node or IAB-MT expires, or the IAB node or IAB-MT receives a random reception from its MAC.
  • the Type 4BH RLF indication is the Type 4/4X BH link RLF notification or indication, which is used to notify/indicate recovery failure/instruct the child node to perform the wireless link failure process.
  • a type 4BH RLF indication may be sent to the IAB node.
  • the first node is connected as an IAB node, or the first node is an IAB node.
  • the first node is connected as an IAB node, or the first node is an IAB node, including at least one of the following:
  • the first node accesses the network as an IAB node
  • the first node is connected to the secondary node as an IAB node
  • the first node serves as an IAB node for child nodes or terminal devices
  • At least one connected IAB node has established a return link RLC channel with the first node.
  • a field is included in the RRCSetupComplete message, which is used to indicate that the connection is established by the IAB node, for example, the field is iab-NodeIndication-r16;
  • connection establishment process is part of the IAB-MT establishment phase or establishment phase of this node integration process.
  • the first node is connected to the secondary node as an IAB node during the process of adding and/or updating the secondary node
  • the process of adding a secondary node may be the SgNB addition phase of the IAB integration process working in NSA mode;
  • an IE is included in the SGNB ADDITION REQUEST message or the SGNB MODIFICATION REQUEST message to indicate that the request comes from an IAB node, for example, the IE is IAB Node Indication.
  • the broadcast supports IAB, that is, an IE or field is included in the system message to indicate IAB support and /or cell status of IAB, for example:
  • This IE or field is included in NPN-IdentityInfo or PLMN-IdentityInfo;
  • This field can be iab-support: when this field exists (present), the cell of this node supports IAB and the cell can also be regarded as a candidate for IAB node cell selection or reselection; when this field does not exist (absent), this The cell of the node does not support IAB and/or the cell is forbidden to the IAB node (bar);
  • a system message could be SIB1.
  • the wireless link failure notification of the backhaul link may also be referred to as the wireless link failure indication of the backhaul link, the wireless link failure notification, or the wireless link failure indication, etc., and is used to indicate to its child nodes
  • the wireless link failure notification of the backhaul link may be a type 2 or type 1 wireless link failure notification.
  • the type 2 radio link failure notification is used to indicate that the first node detects that the backhaul link radio link fails and the first node is trying to recover from the backhaul link radio link failure
  • the type 1 The wireless link failure notification is used to indicate that the first node detects that the wireless link of the backhaul link fails.
  • the type 2 or type 1 radio link failure notification is carried by the BAP control PDU.
  • the first condition may include: AS security has been activated and SRB2 has been established.
  • AS security has been activated means that the initial security activation process has been successfully completed between the first node and its main node or main IAB donor.
  • the initial security activation process has been successfully completed between the first IAB node and the IAB donor in Figure 6; the initial security activation process has been successfully completed between the first IAB node and the MeNB in Figure 7; and for example, the first IAB node in Figure 8
  • An initial security activation process has been successfully completed between an IAB node and an IAB donor.
  • the first condition also includes at least one of the following:
  • the SCG failure information process is not initiated or cannot be initiated;
  • the MCG failure information procedure is not initiated or cannot be initiated;
  • the first node is switching or transplanting.
  • the failure to initiate or fail to initiate the SCG failure information process includes at least one of the following:
  • the dual connectivity is NR-DC
  • MCG transmission is suspended, or, an MCG failure information procedure is initiated.
  • MCG transmission is suspended, or, an MCG failure information procedure is initiated, including:
  • MCG RLF When neither MCG nor SCG is suspended and t316 is configured, when it is detected that MCG RLF is configured with split (split) SRB1 or SRB3, T316 of this node is not running; or neither MCG nor SCG is suspended Next, when MCG RLF is detected, it also supports reporting MCG failure information to the IAB host through F1 interface messages.
  • the failure to initiate or fail to initiate the MCG failure information process includes at least one of the following:
  • the first timer is not configured; for example, the first timer is timer T316;
  • PSCell change or PSCell increase is in progress.
  • the unconfigured timer T316 includes: the node is not configured with split SRB1 or SRB3; or, the node is configured with split SRB1 and/or SRB3, but the network does not indicate the value of the timer T316, that is, the domain T316 is not included.
  • SCG transfers are suspended, including:
  • SCG failure information transmission MCG transmission or SCG transmission is not suspended, SCG RLF is detected, or, SCG reconfiguration with sync fails, or SCG configuration fails, or SCG lower layer indication A SRB3-related integrity check failed, or,
  • Initiated EUTRA SCG failure information transmission SCG RLF is detected when MCG transmission or SCG transmission is not suspended, or SCG change (change) fails, or due to exceeding the maximum uplink transmission when powerControlMode is configured to 1
  • the timing difference (timing difference) stops the uplink transmission to the PSCell.
  • ongoing PSCell changes or PSCell additions include:
  • the timer T304 of NR PSCell is running
  • the timer T304 is started, and/or, when the random access on the corresponding special cell is successfully completed or When the SCG is released, the timer T304 is stopped.
  • the timer T307 of the E-UTRA PSCell is running
  • the timer T304 is started; and/or, when the random access on the PSCell is successfully completed, reestablishment or SCG release is initiated, the timer T304 is stopped.
  • the first node is being switched or transplanted, including:
  • the two protocol stacks (dual protocol stacks) belong to an MT logical entity of the first node, Or, the two protocol stacks (dual protocol stacks) respectively belong to two MT logical entities of the first node.
  • the second timer is a timer T304.
  • one MT logical entity of the first node includes 2 protocol stacks, that is, there are 2 separate sets of PHY, MAC and RLC, and a common or separate BAP is used.
  • the two protocol stacks may correspond to the backhaul link RLC channel.
  • any (any) dual protocol stack backhaul link RLC channel is configured; for example, the first field in IE BH-RLC-ChannelConfig uses To indicate that a BH RLC channel between the first node and its parent node is configured as a dual protocol stack BH RLC channel, for example, the first domain is a domain similar to daps-Config-r16.
  • the first field in the IE BH-RLC-ChannelConfig is used to indicate that the channel identifier between the first node and its parent node is a BH RLC channel identified by the first index and/or configured as a dual protocol stack BH RLC channel.
  • the first index may be bh-LogicalChannelIdentity-r16 or bh-RLC-ChannelID-r16.
  • a BH RLC channel is implicitly specified as a dual-stack BH RLC channel, that is, the first index of the BH RLC channel is not explicitly indicated as a dual-protocol BH RLC channel.
  • the configuration information of the dual protocol stack BH RLC channel in the configuration of a BH RLC channel this is to implicitly specify that the BH RLC channel is a dual protocol stack BH RLC channel.
  • the two protocol stacks may correspond to the RRC bearer.
  • the second field in IE DRB-ToAddMod is used to indicate that a bearer is configured as a dual protocol stack bearer.
  • this second domain is the domain daps-Config-r16.
  • the second field in the IE DRB-ToAddMod is used to indicate that the bearer identified by the second index and/or a bearer identified by the second index is configured as a dual protocol stack bearer.
  • the second index is drb-Identity.
  • a bearer is implicitly designated as a dual-protocol stack bearer, that is, the second index of the bearer is not explicitly indicated as a dual-protocol stack bearer.
  • the configuration information of the bearer of the dual protocol stack is included in the configuration of a bearer, which implicitly specifies that the bearer is a bearer of the dual protocol stack.
  • the generation of the return link wireless link failure notification is not triggered.
  • the radio link failure is the source radio link failure
  • trigger the generation of the backhaul link radio link failure notification for example,
  • the generation of a type 3 radio link failure notification is triggered in the protocol stack connected to the source parent node, that is, in the source;
  • the protocol stack connected to the target parent node that is, the target triggers the generation of a type 3 wireless link failure notification.
  • the type 3 radio link failure notification indicates that the backhaul link has successfully recovered from the radio link failure, and the type 3 radio link failure notification is carried by the BAP control PDU.
  • the first node switchover or migration is successfully completed, including at least one of the following:
  • the first node is synchronized to the target cell
  • the first node successfully completes random access in the target cell
  • the first node sends a RRCReconfigurationComplete message
  • the first node has received an L1 or L2 explicit indication that the source cell portion of the dual-stack operation is to be stopped and/or the source cell portion of the dual-stack configuration is to be released;
  • the first node has released the source cell as explicitly requested by the target node, eg, the target parent IAB node.
  • the generation of the backhaul link radio link failure notification is triggered or not triggered.
  • the method shown in FIG. 9 is used to trigger or not trigger the generation of the backhaul link wireless link failure notification;
  • the wireless link fails, the content of the first condition in the case where the first node is configured and/or uses dual connectivity and the wireless link failure is an MCG wireless link failure applies.
  • the detected wireless link failure is the source (inside) wireless link failure between the first node and the source parent node, that is, RLF in source or source RLF
  • the source (inside) wireless link is detected When the path fails, and when the first condition is met and/or based on the status of the timer, trigger or not trigger the generation of the source (inside) backhaul link wireless link failure notification; or, based on the status of the timer, trigger or Not triggering the generation of the source (inside) backhaul link radio link failure notification, or, when the first condition is met, based on the state of the timer, triggering or not triggering the generation of the source (inside) backhaul link radio link failure notification; and/or, 2) when the second condition is met, trigger generation of the source (inside) backhaul link wireless link failure notification, or, when the second condition is met, based on the state of the timer, trigger or The generation of the source (inside) backhaul link radio link failure notification is not triggered,
  • the detected wireless link failure is the failure of the target (in) wireless link between the first node and the target parent node, that is, RLF in target or target RLF
  • the target (in) wireless link is detected When the link fails, and when the first condition is met and/or based on the status of the timer, trigger or not trigger the generation of the target (inside) backhaul link wireless link failure notification; or, based on the status of the timer, trigger Or not trigger the generation of the target (inside) backhaul link wireless link failure notification, or, when the first condition is met, based on the state of the timer, trigger or not trigger the generation of the target (inside) backhaul link wireless link and/or, 2) when the second condition is met, trigger generation of target (inside) backhaul link wireless link failure notification, or, when the second condition is met, based on the state of the timer, trigger Or do not trigger the generation of target (inside) backhaul link radio link failure notification
  • the second condition includes at least one of
  • the source parent node and target parent node can be an IAB node or an IAB donor.
  • step 901 when a wireless link failure is detected, and when a first condition is met and/or based on a state of a timer, triggering or not triggering generation of a backhaul link wireless link failure notification.
  • a wireless link failure when a wireless link failure is detected, and when a first condition is met and/or based on a state of a timer, triggering or not triggering generation of a backhaul link wireless link failure notification.
  • FIG. 10 is another schematic diagram of the method for triggering the generation of a backhaul link wireless link failure notification according to Embodiment 1 of the present application. As shown in Figure 10, the method includes:
  • Step 1001 when a wireless link failure is detected and the first condition is met, trigger or generate or send a backhaul link wireless link failure notification; or,
  • Step 1002 When a wireless link failure is detected, and, when the third timer expires or is not configured, trigger or generate or send a backhaul link wireless link failure notification, or, when the third timer runs or When stopped, no backhaul link radio link failure notification is triggered or generated or sent; or,
  • Step 1003 When a wireless link failure is detected and the first condition is met, and when the third timer times out or is not configured, trigger or generate or send a backhaul link wireless link failure notification, or, when the third timer The backhaul link radio link failure notification is not triggered or generated or sent while the three-timer is running or stopped.
  • the third timer is an inhibit timer or a hysteresis timer.
  • the third timer is started or restarted.
  • the RRC layer or the BAP layer of the first node triggers or does not trigger the generation of the radio link failure notification of the backhaul link based on the state of the third timer.
  • the third timer operates or maintains at the RRC layer or the BAP layer.
  • the RRC layer considers the state of the third timer, e.g., running, timed out, stopped, etc., to determine whether to instruct the BAP to generate a backhaul link radio link failure notification .
  • RRC triggers or does not trigger the generation of a radio link failure notification of the backhaul link, for example, RRC instructs the BAP to generate a radio link failure notification of the backhaul link , or the RRC instructs the BAP not to generate a radio link failure notification of the backhaul link, or the RRC does not instruct the BAP to generate a radio link failure notification of the backhaul link.
  • the BAP when receiving an indication from the RRC layer or detecting RLF, the BAP considers the state of this timer, such as running, timeout, stop, etc., to determine whether to generate or Send a backhaul link radio link failure notification. Or the BAP considers the state of this timer, eg, running, timed out, stopped, etc., to determine whether to cancel a backhaul link radio link failure notification that has been triggered.
  • the BAP generates/does not generate or sends/does not send the backhaul link radio link failure notification based on the state of the timer;
  • RRC instructs the BAP to generate a backhaul link radio link failure notification
  • BAP generates/does not generate or Send/not send a backhaul link radio link failure notification
  • the BAP considers the radio link failure and/or the first condition is met, and based on the state of the timer, generates/does not generate or sends/does not send a backhaul link radio link notification.
  • Link failure notification when a radio link failure is detected and/or the first condition is met, RRC instructs the BAP to generate a backhaul link radio link failure notification; BAP generates/does not generate or Send/not send a backhaul link radio link failure notification; or the BAP considers the radio link failure and/or the first condition is met, and based on the state of the timer, generates/does not generate or sends/does not send a backhaul link radio link notification.
  • Link failure notification when a radio link failure is detected and/or the first condition
  • the third timer is stopped:
  • the reconfigurationWithSync message is included in the MAC or SCG's spCellConfig message, and the MAC of the NR cell group has successfully completed the RA process;
  • the third timer is reconfigured.
  • one third timer is configured/operated/maintained per IAB node or per IAB-MT or per cell group (CG) or per use case (use case).
  • the granularity of the third timer is based on IAB node or IAB-MT or cell group or use case.
  • the value of the third timer may be per IAB node or configured per IAB-MT configuration, e.g. the value of the third timer is included in IE BWP-UplinkDedicated;
  • the value of the third timer can be per cell group (CG) Configured, for example, the value of the third timer is included in the CellGroupConfig IE, or the value of the third timer can be configured per IAB node or per IAB-MT, for example, the value of the third timer is included in the IE BWP -UplinkDedicated;
  • the value of the third timer can be configured per use case, for example,
  • the value of the third timer is included in IE RLF-TimersAndConstants;
  • the value of the third timer is included in IE ReconfigurationWithSync
  • the value of the third timer may be configured per cell group (CG), for example, the value of the third timer is included in the CellGroupConfig IE, or the value of the third timer may be configured per IAB node or per IAB-MT Configured, for example, the value of the third timer included in IE BWP-UplinkDedicated;
  • the granularity of the third timer is based on the use case (use case) and is only suitable for including the first condition and the third timer in the conditions for judging triggering or generating or sending a backhaul link wireless link failure notification state of affairs;
  • the granularity of the third timer is based on the situation of the use case (use case), and the third X timer is used for the RLF situation, and the third Y timer is used for the RLF situation.
  • the granularity of the third X timer and the third Y timer is based on the IAB node or IAB-MT or cell group, for example, the third X timer is based on the cell group, for example, the third Y timer is based on the IAB node or IAB -MT's.
  • step 902 based on the state of the timer, the generation of the backhaul link radio link failure notification is triggered or not triggered. For example,
  • FIG. 11 is another schematic diagram of the method for triggering the generation of a backhaul link wireless link failure notification according to Embodiment 1 of the present application. As shown in Figure 11, the method includes:
  • Step 1101 When the third timer expires, trigger or generate or send a backhaul link wireless link failure notification, or,
  • Step 1102 When the third timer is running or stopped, the backhaul link radio link failure notification will not be triggered or generated or sent.
  • the third timer is stopped.
  • the type 3 radio link failure notification indicates that the backhaul link has successfully recovered from the radio link failure, and the type 3 radio link failure notification is carried by the BAP control PDU.
  • step 903 when the first condition is satisfied, based on the state of the timer, trigger or not trigger generation of the backhaul link radio link failure notification. For example,
  • FIG. 12 is another schematic diagram of the method for triggering the generation of a backhaul link wireless link failure notification according to Embodiment 1 of the present application. As shown in Figure 12, the method includes:
  • Step 1201 When the first condition is met, and when the third timer expires, trigger or generate or send a backhaul link wireless link failure notification, or,
  • Step 1202 When the first condition is met, and when the third timer is running or stopped, the backhaul link radio link failure notification will not be triggered or generated or sent.
  • the third timer is stopped.
  • the type 3 radio link failure notification indicates that the backhaul link has successfully recovered from the radio link failure, and the type 3 radio link failure notification is carried by the BAP control PDU.
  • the wireless link failure is an SCG wireless link failure
  • the SCG failure information process is not initiated or cannot be initiated. If it is connected as an IAB node, the lower layer is triggered to initiate the BH RLF indication process;
  • the radio link failure is an MCG radio link failure
  • the MCG failure information process is not initiated or cannot be initiated. If it is connected as an IAB node, the lower layer is triggered to initiate the BH RLF indication process.
  • the UE shall:
  • timer T304 for the NR PSCell is not running in case of NR-DC or timer T307 of the E-UTRA PSCell is not running as specified in TS 30.331], [cla 5.3.10.10, in NE-DC):
  • the UE shall:
  • the UE shall:
  • timer T304 for the NR PSCell is not running in case of NR-DC or timer T307 of the E-UTRA PSCell is not running as specified in TS 30.331], [cla 5.3.10.10, in NE-DC):
  • the UE shall:
  • the UE shall:
  • timer T304 for the NR PSCell is not running in case of NR-DC or timer T307 of the E-UTRA PSCell is not running as specified in TS 30.331], [cla 5.3.10.10, in NE-DC):
  • the UE shall:
  • the UE User Equipment in the above standard is, for example, IAB-MT.
  • the communication system in the above standard may include a UE (User Equipment) and a network node, where the UE includes an IAB-MT.
  • UE User Equipment
  • IAB-MT IAB-MT
  • Scenario 2 The generation of type 2 RLF indication is triggered when source RLF is detected during DAPS HO.
  • the UE shall:
  • the UE shall:
  • the UE configuration includes state variables and parameters of each radio bearer.
  • the UE shall:
  • the UE shall:
  • the UE configuration includes state variables and parameters of each radio bearer.
  • type 2 RLF instructions can be reduced by further restricting the conditions for generating type 2 RLF instructions, thereby avoiding source-side RLF instruction storms, reducing resource overhead, and reducing security risks.
  • the embodiment of the present application provides a method for triggering the generation of a radio link failure notification of a backhaul link, and the method is applied to a first node.
  • FIG. 13 is a schematic diagram of a method for triggering generation of a radio link failure notification of a backhaul link according to Embodiment 2 of the present application. As shown in Figure 13, the method includes:
  • Step 1301 When the second condition is met, trigger the generation of a backhaul link wireless link failure notification, or,
  • Step 1302 When the second condition is met, based on the state of the timer, trigger or not trigger the generation of the wireless link failure notification of the backhaul link,
  • the second condition includes at least one of the following:
  • the first timer expires
  • the second timer expires
  • An integrity check failure indication was received from a lower layer.
  • the first timer is a timer T316, and/or, the second timer is a timer T304.
  • the network configures the value of the first timer.
  • the first timer is started when the MCGFailureInformation message is sent or transmitted.
  • the first timer when receiving a RRCRelease message, a RRCReconfiguration message with PCell reconfigurationwithSync or a MobilityFromNRCommand message; or, when an RRC connection reestablishment process is initiated, the first timer is stopped.
  • the second timer expires, including:
  • the second timer of the MCG expires, and no DAPS bearer or dual protocol stack return link RLC channel is configured; or, the radio link failure is detected in the source PCell; or,
  • the second timer of SCG expires and NR-DC is used and MCG transmission is suspended.
  • the second timer when receiving the RRCReconfiguration message or the conditional reconfiguration execution message including reconfigurationWithSync, the second timer is started.
  • the second timer is stopped.
  • the RRC connection reconfiguration fails, including:
  • the IAB node or IAB-MT uses NR SA, NE-DC or NR-DC, and the IAB node or IAB-MT cannot comply with (comply) the partial configuration or embedded SCG configuration or partial MCG included in the RRCReconfiguration message received via SRB1
  • the IAB node or IAB-MT using NR SA or NR-DC cannot comply with the partial configuration included in the RRCReconfiguration message received via SRB3 and MCG transmission is suspended.
  • the integrity check failure indication from the lower layer includes at least one of the following:
  • the MAC CE integrity check from the MAC sublayer fails, for example, the SCell activation MAC CE integrity check fails;
  • Integrity check failure of e.g. BAP Control PDU from BAP sublayer e.g. BAP Control PDU from BAP sublayer.
  • the first node is connected as an IAB node, or the first node is an IAB node.
  • the wireless link failure notification of the backhaul link is a type 2 wireless link failure notification.
  • the fourth timer when a backhaul link wireless link failure notification is triggered or generated or sent, the fourth timer is started or restarted.
  • the RRC layer or the BAP layer of the first node triggers or does not trigger the generation of the radio link failure notification of the backhaul link based on the state of the fourth timer.
  • the fourth timer is stopped:
  • the reconfigurationWithSync message is included in the MAC or SCG's spCellConfig message, and the MAC of the NR cell group has successfully completed the RA process;
  • the fourth timer is reconfigured.
  • one fourth timer is configured for each IAB node or each IAB-MT or each cell group or each use case.
  • the fourth timer is an inhibit timer or a hysteresis timer.
  • the embodiment of the present application provides a method for triggering the generation of a backhaul link wireless link failure notification, which is used for the first node, that is, the first IAB node, the child IAB node of the first IAB node, and the first IAB node The parent IAB node.
  • This method corresponds to that described in Example 1.
  • FIG. 14 is a schematic diagram of a method for triggering generation of a backhaul link wireless link failure notification according to Embodiment 3 of the present application. As shown in Figure 14, the method includes:
  • Step 1401 The MT of the first IAB node detects that the wireless link of the backhaul link between the first IAB node and its parent IAB node fails;
  • Step 1402 When the first condition is met, trigger the generation of a backhaul link wireless link failure notification
  • Step 1403 the DU of the first IAB node sends a wireless link failure notification of the backhaul link to the sub-IAB nodes of the first IAB node.
  • FIG. 15 is a schematic diagram of a method for triggering generation of a backhaul link wireless link failure notification according to Embodiment 3 of the present application. As shown in Figure 15, the method includes:
  • Step 1501 the MT of the first IAB node detects that the wireless link of the backhaul link between the first IAB node and its parent IAB node fails;
  • Step 1502 Based on the status of the timer, trigger the generation of a wireless link failure notification of the backhaul link;
  • Step 1503 the DU of the first IAB node sends a wireless link failure notification of the backhaul link to the sub-IAB nodes of the first IAB node.
  • FIG. 16 is a schematic diagram of a method for triggering generation of a backhaul link wireless link failure notification according to Embodiment 3 of the present application. As shown in Figure 16, the method includes:
  • Step 1601 the MT of the first IAB node detects that the wireless link of the backhaul link between the first IAB node and its parent IAB node fails;
  • Step 1602 When the first condition is met, based on the status of the timer, trigger the generation of a backhaul link wireless link failure notification;
  • Step 1603 the DU of the first IAB node sends a wireless link failure notification of the backhaul link to the sub-IAB nodes of the first IAB node.
  • FIG. 17 is a schematic diagram of a method for triggering generation of a wireless link failure notification of a backhaul link according to Embodiment 3 of the present application. As shown in Figure 17, the method includes:
  • Step 1701 Based on the status of the timer, trigger the generation of a backhaul link wireless link failure notification
  • Step 1702 The DU of the first IAB node sends a wireless link failure notification of the backhaul link to the child IAB nodes of the first IAB node.
  • Fig. 18 is a schematic diagram of a method for triggering generation of a backhaul link wireless link failure notification according to Embodiment 3 of the present application. As shown in Figure 18, the method includes:
  • Step 1801 When the first condition is met, based on the status of the timer, trigger the generation of a backhaul link wireless link failure notification;
  • Step 1802 The DU of the first IAB node sends a wireless link failure notification of the backhaul link to the sub-IAB nodes of the first IAB node.
  • An embodiment of the present application provides an apparatus for triggering generation of a wireless link failure notification of a backhaul link, and the apparatus is used for a first node.
  • the device corresponds to the method described in Example 1.
  • FIG. 19 is a schematic diagram of an apparatus for triggering generation of a radio link failure notification of a backhaul link according to Embodiment 4 of the present application. As shown in Figure 19, the device 1900 includes:
  • the first triggering unit 1901 is configured to trigger or not trigger generation of a backhaul link wireless link failure notification when a wireless link failure is detected, and when the first condition is met and/or based on the state of the timer; or,
  • the second triggering unit 1902 based on the state of the timer, triggers or does not trigger the generation of a backhaul link radio link failure notification; or,
  • the third triggering unit 1903 when the first condition is met, triggers or does not trigger the generation of the wireless link failure notification of the backhaul link based on the state of the timer.
  • the first node is connected as an IAB node, or the first node is an IAB node.
  • the first node is connected as an IAB node, or the first node is an IAB node, including at least one of the following:
  • the first node accesses the network as an IAB node
  • the first node is connected to the secondary node as an IAB node
  • the first node serves as an IAB node for child nodes or terminal devices
  • At least one connected IAB node has established a return link RLC channel with the first node.
  • the first condition includes: AS security has been activated and SRB2 has been established.
  • the first condition also includes at least one of the following:
  • the SCG failure information process is not initiated or cannot be initiated;
  • the MCG failure information procedure is not initiated or cannot be initiated.
  • the first node is undergoing a handover or migration.
  • the failure to initiate or fail to initiate the SCG failure information process includes at least one of the following:
  • the dual connectivity is NR-DC
  • MCG transmission is suspended, or, an MCG failure information procedure is initiated.
  • the MCG failure information process that is not initiated or cannot be initiated includes at least one of the following:
  • the first timer is not configured
  • PSCell change or PSCell increase is in progress.
  • the first node is being switched or transplanted, including:
  • the two protocol stacks belong to one MT logical entity of the first node.
  • the first node is being switched or transplanted, including:
  • the second timer when two protocol stacks are used to connect to the source parent node and the target parent node respectively, the two protocol stacks respectively belong to the two MT logical entities of the first node.
  • the two protocol stacks correspond to the backhaul link RLC channel.
  • using the two protocol stacks to connect to the source parent node and the target parent node respectively means that any dual protocol stack backhaul link RLC channel is configured.
  • the first field in IE BH-RLC-ChannelConfig is used to indicate that a BH RLC channel between the first node and its parent node is configured as a dual protocol stack BH RLC channel.
  • the two protocol stacks correspond to RRC bearers.
  • using the two protocol stacks to connect to the source parent node and the target parent node respectively means that any dual protocol stack bearer is configured.
  • the second field in IE DRB-ToAddMod is used to indicate that a bearer is configured as a dual protocol stack bearer.
  • the generation of the return link wireless link failure notification is not triggered.
  • the wireless link failure is the failure of the source wireless link
  • the generation of the return link wireless link failure notification is triggered, wherein,
  • the protocol stack connected to the target parent node triggers the generation of a type 3 wireless link failure notification.
  • the type 3 radio link failure notification indicates that the backhaul link has successfully recovered from the radio link failure, and the type 3 radio link failure notification is carried by the BAP control PDU.
  • the first node switching or migration is successfully completed, including at least one of the following:
  • the first node is synchronized to the target cell
  • the first node successfully completes random access in the target cell
  • the first node sends a RRCReconfigurationComplete message
  • the first node has received an L1 or L2 explicit indication that the source cell portion of the dual-stack operation is to be stopped and/or the source cell portion of the dual-stack configuration is to be released;
  • the first node has released the source cell as explicitly requested by the target node.
  • the generation of the backhaul link radio link failure notification is triggered or not triggered.
  • FIG. 20 is a schematic diagram of a first trigger unit according to Embodiment 4 of the present application. As shown in Figure 20, the first trigger unit 1901 includes:
  • a fourth triggering unit 2001 which triggers or generates or sends a backhaul link wireless link failure notification when a wireless link failure is detected and the first condition is met; or,
  • the fifth triggering unit 2002 is configured to trigger or generate or send a return link wireless link failure notification when a wireless link failure is detected, and when the third timer expires or is not configured, or, when the third timer Backhaul link radio link failure notifications are not triggered or generated or sent while the server is running or stopped; or,
  • the sixth triggering unit 2003 is configured to trigger or generate or send a return link wireless link failure notification when a wireless link failure is detected and the first condition is met, and when the third timer expires or is not configured, Alternatively, when the third timer is running or stopped, the backhaul link radio link failure notification will not be triggered or generated or sent.
  • FIG. 21 is a schematic diagram of a second trigger unit according to Embodiment 4 of the present application. As shown in Figure 21, the second trigger unit 1902 includes:
  • a seventh triggering unit 2101 which triggers or generates or sends a backhaul link radio link failure notification when the third timer expires, or,
  • the eighth triggering unit 2102 when the third timer is running or stopped, it will not trigger or generate or send the backhaul link wireless link failure notification.
  • the third timer is stopped.
  • the third trigger unit 1903 includes:
  • a ninth triggering unit which triggers or generates or sends a backhaul link wireless link failure notification when the first condition is met and when the third timer expires, or,
  • a tenth triggering unit when the first condition is met, and when the third timer is running or stopped, it will not trigger or generate or send the backhaul link wireless link failure notification.
  • the third timer is stopped.
  • the third timer is started or restarted.
  • the RRC layer or the BAP layer of the first node triggers or does not trigger the generation of the radio link failure notification of the backhaul link based on the state of the third timer.
  • the third timer is stopped:
  • the reconfigurationWithSync message is included in the MAC or SCG's spCellConfig message, and the MAC of the NR cell group has successfully completed the RA process;
  • the third timer is reconfigured.
  • one third timer is configured for each IAB node or each IAB-MT or each cell group or each use case.
  • the third timer is an inhibit timer or a hysteresis timer.
  • the wireless link failure notification of the backhaul link is a type 2 or type 1 wireless link failure notification.
  • the type 2 wireless link failure notification is used to indicate that the first node detects that the wireless link of the backhaul link fails and the first node is trying to recover from the failure of the wireless link of the backhaul link ,
  • the type 1 radio link failure notification is used to indicate that the first node detects that the backhaul link radio link fails
  • the type 2 or type 1 wireless link failure notification is carried by the BAP control PDU.
  • the first timer is a timer T316.
  • the second timer is a timer T304.
  • the implementation of the functions of the above-mentioned units can refer to the implementation method of the relevant steps in Embodiment 1, and the description will not be repeated here.
  • An embodiment of the present application provides an apparatus for triggering generation of a wireless link failure notification of a backhaul link, and the apparatus is used for a first node.
  • the device corresponds to the method described in Example 2.
  • FIG. 22 is a schematic diagram of an apparatus for triggering generation of a wireless link failure notification of a backhaul link according to Embodiment 5 of the present application. As shown in Figure 22, the device 2200 includes:
  • the eleventh triggering unit 2201 when the second condition is met, triggers the generation of a backhaul link radio link failure notification, or,
  • the twelfth triggering unit 2202 when the second condition is met, based on the state of the timer, trigger or not trigger the generation of the backhaul link radio link failure notification,
  • the second condition includes at least one of the following:
  • the first timer expires
  • the second timer expires
  • An integrity check failure indication was received from a lower layer.
  • the network configures the value of the first timer only when the IAB node or the IAB-MT configures the split SRB1 or SRB3.
  • the first timer when the MCGFailureInformation message is sent or transmitted, the first timer is started.
  • the first timer when the RRCRelease message, the RRCReconfiguration message with PCell reconfigurationwithSync or the MobilityFromNRCommand message is received; or, when the RRC connection reestablishment process is initiated, the first timer is stopped.
  • the second timer expires, including:
  • the second timer of the MCG expires, and no DAPS bearer or dual protocol stack return link RLC channel is configured; or, the radio link failure is detected in the source PCell; or,
  • the second timer of SCG expires and NR-DC is used and MCG transmission is suspended.
  • the second timer when receiving the RRCReconfiguration message or the conditional reconfiguration execution message including reconfigurationWithSync, the second timer is started.
  • the second timer is stopped.
  • the RRC connection reconfiguration fails, including:
  • IAB node or IAB-MT using NR SA, NE-DC or NR-DC, IAB node or IAB-MT cannot follow the partial configuration or embedded SCG configuration or partial MCG configuration and partial configuration included in the RRCReconfiguration message received via SRB1
  • the IAB node or IAB-MT using NR SA or NR-DC cannot follow the partial configuration included in the RRCReconfiguration message received via SRB3 and MCG transmission is suspended.
  • the integrity check failure indication from the lower layer includes at least one of the following:
  • the first node is connected as an IAB node, or the first node is an IAB node.
  • the first timer is a timer T316, and/or, the second timer is a timer T304.
  • the wireless link failure notification of the backhaul link is a type 2 wireless link failure notification.
  • the twelfth triggering unit when the second condition is met, and when the fourth timer times out or is not configured, the twelfth triggering unit triggers or generates or sends a backhaul link wireless link failure notification, or, When the fourth timer is running or stopped, no backhaul link radio link failure notification will be triggered or generated or sent.
  • the fourth timer when a backhaul link wireless link failure notification is triggered or generated or sent, the fourth timer is started or restarted.
  • the RRC layer or the BAP layer of the first node triggers or does not trigger the generation of the radio link failure notification of the backhaul link based on the state of the fourth timer.
  • the fourth timer is stopped:
  • the reconfigurationWithSync message is included in the MAC or SCG's spCellConfig message, and the MAC of the NR cell group has successfully completed the RA process;
  • the fourth timer is reconfigured.
  • one fourth timer is configured for each IAB node or each IAB-MT or each cell group or each use case.
  • the fourth timer is an inhibit timer or a hysteresis timer.
  • An embodiment of the present application provides a network device, and the network device includes the sending device for triggering generation of a wireless link failure notification of a backhaul link as described in Embodiment 4.
  • FIG. 23 is a schematic block diagram of a system configuration of a network device according to Embodiment 6 of the present application.
  • the network device 2300 may include: a processor (processor) 2310 and a memory 2320 ; the memory 2320 is coupled to the processor 2310 .
  • the memory 2320 can store various data; in addition, it also stores an information processing program 2330, and executes the program 2330 under the control of the processor 2310 to receive various information sent by the terminal equipment and send various information to the terminal equipment .
  • the function of the device for triggering the generation of the wireless link failure notification of the backhaul link may be integrated into the processor 2310 .
  • the processor 2310 may be configured to: when a wireless link failure is detected, and when the first condition is met and/or based on the state of the timer, trigger or not trigger generation of the backhaul link wireless link failure notification; Or, based on the state of the timer, triggering or not triggering the generation of the wireless link failure notification of the backhaul link; or, when the first condition is met, based on the state of the timer, triggering or not triggering the generation of the wireless link of the backhaul link Failure notification.
  • the device for triggering the generation of the wireless link failure notification of the backhaul link may be configured separately from the processor 2310, for example, the device for triggering the generation of the wireless link failure notification of the backhaul link may be configured with the processor 2310
  • the connected chip is controlled by the processor 2310 to realize the function of triggering the device for generating the wireless link failure notification of the backhaul link.
  • the network device 2300 may further include: a transceiver 2340 and an antenna 2350 ; 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 network device 2300 does not necessarily include all components shown in FIG. 23 ; in addition, the network device 2300 may also include components not shown in FIG. 23 , and reference may be made to the prior art.
  • An embodiment of the present application provides a network device, and the network device includes the sending device for triggering generation of a wireless link failure notification of a backhaul link as described in Embodiment 5.
  • FIG. 24 is a schematic block diagram of a system configuration of a network device according to Embodiment 7 of the present application.
  • a network device 2400 may include: a processor (processor) 2410 and a memory 2420 ; the memory 2420 is coupled to the processor 2410 .
  • the memory 2420 can store various data; in addition, it also stores an information processing program 2430, and executes the program 2430 under the control of the processor 2410 to receive various information sent by the terminal equipment and send various information to the terminal equipment .
  • the function of the device for triggering the generation of the wireless link failure notification of the backhaul link may be integrated into the processor 2410 .
  • the processor 2410 may be configured to: when the second condition is met, trigger the generation of the backhaul link radio link failure notification, or, when the second condition is met, trigger or not trigger the generation of the backhaul link radio link failure notification based on the status of the timer
  • the second condition includes at least one of the following: the first timer expires; the second timer expires; RRC connection reconfiguration fails; and an integrity check failure indication is received from a lower layer.
  • the device for triggering the generation of the wireless link failure notification of the backhaul link may be configured separately from the processor 2410, for example, the device for triggering the generation of the wireless link failure notification of the backhaul link may be configured with the processor 2410
  • the connected chip is controlled by the processor 2410 to realize the function of triggering the device for generating the wireless link failure notification of the backhaul link.
  • the network device 2400 may further include: a transceiver 2440 and an antenna 2450 ; 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 network device 2400 does not necessarily include all the components shown in FIG. 24 ; in addition, the network device 2400 may also include components not shown in FIG. 24 , and reference may be made to the prior art.
  • An embodiment of the present application provides a communication system, where the communication system includes the network device described in Embodiment 6 or the network device described in Embodiment 7.
  • FIG. 25 is a schematic diagram of a communication system according to Embodiment 8 of the present application.
  • the communication system 2500 includes: a first IAB node 2501, a child IAB node 2502 of the first IAB node, a terminal device 2503 served by the first IAB node, and a parent IAB node 2504 of the first IAB node, that is, the IAB host node.
  • the first IAB node 2501 may be the network device described in Embodiment 6 or the network device described in Embodiment 7.
  • the first IAB node 2501 detects that the wireless link of the backhaul link between itself and the parent IAB node 2504, that is, the IAB host node, fails.
  • Fig. 26 is another schematic diagram of the communication system according to Embodiment 8 of the present application.
  • the communication system 2600 adopts the EN-DC framework, and the communication system 2600 includes: a first IAB node 2601, a child IAB node 2602 of the first IAB node, a terminal device 2603 served by the first IAB node, and an IAB host Node 2604 and MeNB2605.
  • the first IAB node 2601 can access the network through the IAB host node 2604 and the MeNB 2605 .
  • the first IAB node 2601 may be the network device described in Embodiment 6 or the network device described in Embodiment 7.
  • the first IAB node 2601 detects the MCG RLF between MeNB2605;
  • the first IAB node 2601 detects the SCG RLF with the IAB host node 2604.
  • Fig. 27 is another schematic diagram of the communication system according to Embodiment 8 of the present application.
  • the communication system 2700 adopts the NR-DC framework, and the communication system 2700 includes: a first IAB node 2701, a child IAB node 2702 of the first IAB node, a terminal device 2703 served by the first IAB node, a first The first parent IAB node 2704, the second parent IAB node 2705, and the IAB host node 2706 of the IAB node.
  • the first IAB node 2701 can access the network through the first parent IAB node 2704 and the second parent IAB node 2705 .
  • the first parent IAB node 2704 is the primary node
  • the second parent IAB node 2705 is the secondary node.
  • the first IAB node 2701 may be the network device described in Embodiment 6 or the network device described in Embodiment 7.
  • the first IAB node 2701 has detected the MCG RLF between the first parent IAB node 2704;
  • the first IAB node 2701 detects the SCG RLF between the second parent IAB node 2705.
  • the above is an example of the IAB architecture to which the method and device for generating the preemption cache status report according to the embodiments of the present application are applied, and it can also be applied to communication system structures under various other IAB architectures.
  • a device for triggering the generation of a wireless link failure notification of a backhaul link the device being applied to a first node, the device comprising:
  • a first triggering unit which, when detecting a wireless link failure, and when the first condition is met and/or based on the state of the timer, triggers or does not trigger the generation of a backhaul link wireless link failure notification; or,
  • the second triggering unit based on the state of the timer, triggers or does not trigger the generation of a backhaul link wireless link failure notification; or,
  • the third triggering unit when the first condition is met, triggers or does not trigger the generation of the wireless link failure notification of the backhaul link based on the state of the timer.
  • the first node is connected as an IAB node, or the first node is an IAB node.
  • the first node accesses the network as an IAB node
  • the first node is connected to the secondary node as an IAB node
  • the first node serves as an IAB node for child nodes or terminal devices
  • At least one connected IAB node has established a backhaul link RLC channel with the first node.
  • the first condition includes: AS security has been activated and SRB2 has been established.
  • the first condition also includes at least one of the following:
  • the SCG failure information procedure is not initiated or cannot be initiated;
  • the MCG failure information procedure is not initiated or cannot be initiated.
  • the first node is undergoing handover or migration.
  • non-initiated or unable to initiate SCG failure information process includes at least one of the following:
  • said dual connectivity is NR-DC
  • MCG transmission is suspended, or, an MCG failure information procedure is initiated.
  • failure to initiate or fail to initiate the MCG failure information process includes at least one of the following:
  • the first timer is not configured
  • PSCell change or PSCell increase is in progress.
  • the two protocol stacks belong to one MT logical entity of the first node.
  • the second timer when two protocol stacks are used to connect to the source parent node and the target parent node respectively, the two protocol stacks respectively belong to the two MT logical entities of the first node.
  • the two protocol stacks correspond to the backhaul link RLC channel.
  • any dual-protocol stack backhaul link RLC channel is configured.
  • the first field in the IE BH-RLC-ChannelConfig is used to indicate that a BH RLC channel between the first node and its parent node is configured as a dual protocol stack BH RLC channel.
  • the two protocol stacks correspond to RRC bearers.
  • the second field in IE DRB-ToAddMod is used to indicate that a bearer is configured as a dual protocol stack bearer.
  • the generation of the backhaul link wireless link failure notification is not triggered.
  • the wireless link failure is a source wireless link failure
  • trigger generation of a backhaul link wireless link failure notification When the wireless link failure is a source wireless link failure, trigger generation of a backhaul link wireless link failure notification.
  • the protocol stack connected to the source parent node triggers the generation of a type 3 radio link failure notification.
  • the protocol stack connected to the target parent node triggers the generation of a type 3 wireless link failure notification.
  • the type 3 wireless link failure notification indicates that the backhaul link has successfully recovered from the wireless link failure
  • the type 3 wireless link failure notification is carried by the BAP control PDU.
  • the first node is synchronized to the target cell
  • the first node successfully completes random access in the target cell
  • the first node sends an RRCReconfigurationComplete message
  • the first node has received an L1 or L2 explicit indication that the source cell part of the dual protocol stack operation is to be stopped and/or the source cell part of the dual protocol stack configuration is to be released;
  • the first node has released the source cell as explicitly requested by the target node.
  • a fourth triggering unit which triggers or generates or sends a backhaul link wireless link failure notification when a wireless link failure is detected and the first condition is met;
  • the fifth triggering unit is configured to trigger or generate or send a backhaul link wireless link failure notification when a wireless link failure is detected, and when the third timer expires or is not configured, or, when the third timer A backhaul link radio link failure notification is not triggered or generated or sent while running or stopped; or,
  • a sixth triggering unit which triggers or generates or sends a backhaul link wireless link failure notification when a wireless link failure is detected and the first condition is met, and when the third timer expires or is not configured, Alternatively, when the third timer is running or stopped, the backhaul link radio link failure notification will not be triggered or generated or sent.
  • a seventh triggering unit which triggers or generates or sends a backhaul link wireless link failure notification when the third timer expires, or,
  • An eighth triggering unit when the third timer is running or stopped, it will not trigger or generate or send the wireless link failure notification of the backhaul link.
  • the third timer is stopped.
  • a ninth triggering unit which triggers or generates or sends a backhaul link wireless link failure notification when the first condition is met and when the third timer expires, or,
  • a tenth triggering unit when the first condition is met, and when the third timer is running or stopped, it will not trigger or generate or send the backhaul link wireless link failure notification.
  • the RRC layer or the BAP layer of the first node triggers or does not trigger generation of a backhaul link radio link failure notification based on the state of the third timer.
  • stop the third timer When at least one of the following conditions is met, stop the third timer:
  • the reconfigurationWithSync message is included in the MAC or SCG's spCellConfig message, and the MAC of the NR cell group has successfully completed the RA process;
  • One third timer is configured per IAB node or per IAB-MT or per cell group or per use case.
  • the third timer is an inhibit timer or a hysteresis timer.
  • the wireless link failure notification of the backhaul link is a type 2 or type 1 wireless link failure notification.
  • the type 2 radio link failure notification is used to indicate that the first node detects that the backhaul link radio link fails and the first node is trying to recover from the backhaul link radio link failure
  • the type 1 wireless link failure notification is used to indicate that the first node detects that the backhaul link wireless link fails
  • the type 2 or type 1 wireless link failure notification is carried by the BAP control PDU.
  • the first timer is timer T316.
  • the second timer is timer T304.
  • An apparatus for triggering generation of a wireless link failure notification of a backhaul link the apparatus being applied to a first node, the apparatus comprising:
  • An eleventh triggering unit which triggers the generation of a backhaul link wireless link failure notification when the second condition is met, or,
  • the twelfth triggering unit when the second condition is met, based on the state of the timer, triggers or does not trigger the generation of the backhaul link wireless link failure notification,
  • the second condition includes at least one of the following:
  • the first timer expires
  • the second timer expires
  • An integrity check failure indication was received from a lower layer.
  • the network configures the value of the first timer.
  • the first timer is started when the MCGFailureInformation message is sent or transmitted.
  • the first timer When receiving a RRCRelease message, a RRCReconfiguration message with PCell reconfigurationwithSync or a MobilityFromNRCommand message; or, when an RRC connection reestablishment process is initiated, the first timer is stopped.
  • the second timer of the MCG expires, and no DAPS bearer or dual protocol stack return link RLC channel is configured; or, the radio link failure is detected in the source PCell; or,
  • the second timer of SCG expires and NR-DC is used and MCG transmission is suspended.
  • the second timer is stopped.
  • the RRC connection reconfiguration failed including:
  • IAB node or IAB-MT using NR SA, NE-DC or NR-DC, IAB node or IAB-MT cannot follow the partial configuration or embedded SCG configuration or partial MCG configuration and partial configuration included in the RRCReconfiguration message received via SRB1
  • the IAB node or IAB-MT using NR SA or NR-DC cannot follow the partial configuration included in the RRCReconfiguration message received via SRB3 and MCG transmission is suspended.
  • the integrity check failure indication from the lower layer includes at least one of the following:
  • the first node is connected as an IAB node, or the first node is an IAB node.
  • the first timer is timer T316, and/or
  • the second timer is timer T304.
  • the wireless link failure notification of the backhaul link is a type 2 wireless link failure notification.
  • the twelfth triggering unit triggers or generates or sends a backhaul link wireless link failure notification when the second condition is met, and when the fourth timer expires or is not configured, or, when the fourth timer runs Backhaul link radio link failure notifications are not triggered or generated or sent when active or stopped.
  • the RRC layer or the BAP layer of the first node triggers or does not trigger generation of a backhaul link radio link failure notification based on the state of the fourth timer.
  • stop the fourth timer When at least one of the following conditions is met, stop the fourth timer:
  • the reconfigurationWithSync message is included in the MAC or SCG's spCellConfig message, and the MAC of the NR cell group has successfully completed the RA process;
  • One fourth timer is configured per IAB node or per IAB-MT or per cell group or per use case.
  • the fourth timer is an inhibit timer or a hysteresis timer.
  • a network device is a first node, and the network device includes the apparatus according to any one of Supplements 1-52.
  • a communication system comprising the network device according to supplementary note 53.
  • a method for triggering the generation of a backhaul link wireless link failure notification the method being applied to a first node, the method comprising:
  • the first node is connected as an IAB node, or the first node is an IAB node.
  • the first node accesses the network as an IAB node
  • the first node is connected to the secondary node as an IAB node
  • the first node serves as an IAB node for child nodes or terminal devices
  • At least one connected IAB node has established a backhaul link RLC channel with the first node.
  • the first condition includes: AS security has been activated and SRB2 has been established.
  • the first condition also includes at least one of the following:
  • the SCG failure information procedure is not initiated or cannot be initiated;
  • the MCG failure information procedure is not initiated or cannot be initiated.
  • the first node is undergoing handover or migration.
  • non-initiated or unable to initiate SCG failure information process includes at least one of the following:
  • said dual connectivity is NR-DC
  • MCG transmission is suspended, or, an MCG failure information procedure is initiated.
  • the first timer is not configured
  • PSCell change or PSCell increase is in progress.
  • the two protocol stacks belong to one MT logical entity of the first node.
  • the second timer when two protocol stacks are used to connect to the source parent node and the target parent node respectively, the two protocol stacks respectively belong to the two MT logical entities of the first node.
  • the two protocol stacks correspond to the backhaul link RLC channel.
  • any dual-protocol stack backhaul link RLC channel is configured.
  • the first field in the IE BH-RLC-ChannelConfig is used to indicate that a BH RLC channel between the first node and its parent node is configured as a dual protocol stack BH RLC channel.
  • the two protocol stacks correspond to RRC bearers.
  • the second field in IE DRB-ToAddMod is used to indicate that a bearer is configured as a dual protocol stack bearer.
  • the generation of the backhaul link wireless link failure notification is not triggered.
  • the wireless link failure is a source wireless link failure
  • trigger generation of a backhaul link wireless link failure notification When the wireless link failure is a source wireless link failure, trigger generation of a backhaul link wireless link failure notification.
  • the protocol stack connected to the source parent node triggers the generation of a type 3 radio link failure notification.
  • the protocol stack connected to the target parent node triggers the generation of a type 3 wireless link failure notification.
  • the type 3 wireless link failure notification indicates that the backhaul link has successfully recovered from the wireless link failure
  • the type 3 wireless link failure notification is carried by the BAP control PDU.
  • the first node is synchronized to the target cell
  • the first node successfully completes random access in the target cell
  • the first node sends an RRCReconfigurationComplete message
  • the first node has received an L1 or L2 explicit indication that the source cell portion of the dual-stack operation is to be stopped and/or the source cell portion of the dual-stack configuration is to be released;
  • the first node has released the source cell as explicitly requested by the target node.
  • the third timer is stopped.

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Abstract

一种触发生成回传链路无线链路失败通知的方法及装置。所述方法应用于第一节点,所述方法包括:当检测到无线链路失败时,且当满足第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,当满足第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。

Description

触发生成回传链路无线链路失败通知的方法及装置 技术领域
本发明涉及通信领域。
背景技术
集成的接入和回传(Integrated access and backhaul,IAB)确保NG-RAN里的无线中继。中继节点,即IAB节点(IAB-node),支持NR接入和回传(backhauling)。回传可以包括单跳(hop)或多跳。网络侧NR回传的终点,即IAB宿主(IAB-donor),表示包括支持IAB的额外功能的gNB。IAB宿主也可以称为IAB宿主节点。
IAB节点支持gNB-DU(Distributed Unit,分布单元)的功能,即IAB-DU。IAB-DU终止到终端设备和下一跳IAB节点的NR接入接口,并终止到IAB宿主上的gNB-CU功能的F1协议。另外,IAB节点还支持终端设备功能(UE功能)的一个子集,即IAB-MT,其包括,例如连接到另一个IAB节点或IAB宿主的gNB-DU的、连接到IAB宿主上gNB-CU(Centralized Unit,集中单元)和连接到核心网的物理层、层2(L2)、RRC(Radio Resource Control,无线资源控制)和NAS(Non-Access-Stratum,非接入层)功能。
IAB节点通过一跳或多跳连接到一个IAB宿主。在拓扑中,该IAB宿主为根节点,IAB节点的IAB-DU接口上的邻节点被称为该IAB节点的子节点(descendant node),即子IAB节点(descendant IAB-node),在IAB-MT接口上的邻节点被称为父节点(parent node),即父IAB节点(parent IAB-node)。
应该注意,上面对技术背景的介绍只是为了方便,对本发明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发明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IAB节点与其父IAB节点之间的回传链路(BH link)发生无线链路失败(Radio Link Failure,RLF)的情况下,可能涉及回传链路无线链路失败(BH RLF)通知或指示的触发或生成或发送。
回传链路无线链路失败(BH RLF)通知或指示可以包括以下几种:
BH link RLF通知或指示包括以下4种:
Type 1:“Plain”通知,即,子IAB节点检测到回传链路无线链路失败的指示
Type 2:尝试恢复,即,子IAB节点检测到回传链路无线链路失败,且子IAB节点正在尝试从失败恢复的指示;
Type 3:回传链路无线链路失败已恢复,即回传链路从无线链路失败成功恢复的指示;
Type 4/4X:恢复失败/指示子节点进行无线链路失败过程,即,回传链路无线链路失败恢复失败的指示,父IAB节点何时发送这个指示基于实现,当收到这个指示时子IAB节点应该执行无线链路失败相关的过程;
根据当前机制,RRC重建过程失败时,IAB节点可以向其子节点发送一个回传链路无线链路失败(BH RLF)通知或指示,例如,这里的BH RLF通知或指示是指上面的Type 4/4X回传链路无线链路失败通知或指示;
另外,当检测到无线链路失败时,触发生成一个type 2 RLF指示例如,这里的type 2 RLF通知或指示是指上面的Type 1或Type 2回传链路无线链路失败通知或指示。
在NR里,满足以下一个条件时,终端设备或IAB-MT认为检测到了无线链路失败:
1)特殊小区里定时器T310/T312超时;
2)来自MAC的随机接入问题指示,同时T300/T301/T304/T311/T319均未运行;
3)来自RLC的已经达到最大重传数的指示;
4)如果作为一个IAB节点连接,BAP实体收到BH RLF指示;
5)来自MAC的持续上行LBT失败指示,同时T304未运行。
当终端设备或IAB-MT未配置双连接(Dual Connectivity,DC),或终端设备或IAB-MT配置了DC且以上条件发生在主小区组(MCG)或辅小区(PCell)时,终端设备或IAB-MT认为MCG检测到了RLF;如果终端设备或IAB-MT配置了DC且以上条件发生在辅小区组(SCG)或主辅小区(PSCell)时,终端设备或IAB-MT认为SCG检测到了RLF。
如果正在进行双活动协议栈切换(DAPS HO),以上条件1)-5)发生在目标PCell时,终端设备或IAB-MT认为目标MCG检测到了RLF;当源特殊小区里T310超时, 或来自源MCG MAC的随机接入问题指示,或来自源MCG RLC的已经达到最大重传数的指示,或来自源MCG MAC的持续上行LBT失败指示时,终端设备或IAB-MT认为源MCG检测到了RLF,即源RLF。
另外,当检测到RLF时,触发生成一个type 2 RLF指示,则在检测到上面的RLF时,包括MCG RLF、SCG RLF、源RLF和目标RLF,触发生成一个type 2无线链路失败通知或指示。
发明人发现,根据当前的机制,多种情况会触发生成一个type 2无线链路失败通知或指示。这可能造成type 2无线链路失败通知或指示风暴。
一方面,type 2无线链路失败通知或指示的传输占用回传链路资源,type 2无线链路失败通知或指示风暴将会消耗大量回传链路资源,从而造成数据传输的资源短缺;另外一方面,type 2无线链路失败通知或指示可能通过BAP控制PDU发送,BAP控制PDU是由IAB节点生成的、没有安全保护,存在安全问题,type 2无线链路失败通知或指示风暴增加了发生安全问题的可能性。
为了解决上述问题中的一个或多个,本申请实施例提供了一种触发生成回传链路无线链路失败通知的方法及装置。通过对触发回传链路无线链路失败通知的生成进行限制,能够避免RLF指示风暴,减少资源开销并降低安全风险。
根据本申请实施例的第一方面,提供了一种触发生成回传链路无线链路失败通知的装置,所述装置应用于第一节点,所述装置包括:当检测到无线链路失败时,且当满足第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,或者,当满足第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。
根据本申请实施例的第二方面,提供了一种触发生成回传链路无线链路失败通知的装置,所述装置应用于第一节点,所述装置包括:当满足第二条件时,触发生成回传链路无线链路失败通知,或者,当满足第二条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,所述第二条件包括以下中的至少一个:第一定时器超时;第二定时器超时;RRC连接重配置失败;以及收到来自低层的完整性检查失败指示。
根据本申请实施例的第三方面,提供了一种网络设备,所述网络设备是第一节点, 所述网络设备包括根据本申请实施例的第一方面或第二方面所述的装置。
根据本申请实施例的第四方面,提供了一种通信系统,所述通信系统包括根据本申请实施例的第三方面所述的网络设备。
根据本申请实施例的第五方面,提供了一种触发生成回传链路无线链路失败通知的方法,所述方法应用于第一节点,所述方法包括:当检测到无线链路失败时,且当满足第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,或者,当满足第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。
根据本申请实施例的第六方面,提供了一种触发生成回传链路无线链路失败通知的方法,所述方法应用于第一节点,所述方法包括:当满足第二条件时,触发生成回传链路无线链路失败通知,或者,当满足第二条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,所述第二条件包括以下中的至少一个:第一定时器超时;第二定时器超时;RRC连接重配置失败;以及收到来自低层的完整性检查失败指示。
根据本申请实施例的第七方面,提供了一种提供了一种计算机可读程序,其中当在触发生成回传链路无线链路失败通知的装置或网络设备中执行所述程序时,所述程序使得所述触发生成回传链路无线链路失败通知的装置或网络设备执行本申请实施例的第五方面或第六方面所述的触发生成回传链路无线链路失败通知的方法。
根据本申请实施例的第八方面,提供了一种存储有计算机可读程序的存储介质,其中所述计算机可读程序使得触发生成回传链路无线链路失败通知的装置或网络设备执行本申请实施例的第五方面或第六方面所述的触发生成回传链路无线链路失败通知的方法。
本申请实施例的有益效果之一在于:当检测到无线链路失败时,且当满足第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,当满足第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。这样,通过对触发回传链路无线链路失败通知的生成进行限制,能够避免RLF指示风暴,减少资源开销并降低安全风险。
参照后文的说明和附图,详细公开了本发明的特定实施方式,指明了本发明的原理可以被采用的方式。应该理解,本发明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,本发明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/具有”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。
所包括的附图用来提供对本申请实施例的进一步的理解,其构成了说明书的一部分,用于例示本发明的实施方式,并与文字描述一起来阐释本发明的原理。显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其它的附图。在附图中:
图1是本申请实施例的IAB整体架构的一示意图;
图2是本申请实施例的IAB整体架构的另一示意图;
图3是IAB-DU和IAB-donor-CU间F1-U接口的协议栈的一示意图;
图4是IAB-DU和IAB-donor-CU间F1-C接口的协议栈的一示意图;
图5是本申请实施例的IAB-MT与IAB-donor-CU间SRB的协议栈的一示意图;
图6是本申请实施例的SA模式的单连接场景的一示意图;
图7是本申请实施例的EN-DC模式的双连接场景的一示意图;
图8是本申请实施例的NR-DC模式的双连接场景的一示意图;
图9是本申请实施例1的触发生成回传链路无线链路失败通知的方法的一示意图;
图10是本申请实施例的1的触发生成回传链路无线链路失败通知的方法的另一示意图;
图11是本申请实施例1的触发生成回传链路无线链路失败通知的方法的又一示意图;
图12是本申请实施例1的触发生成回传链路无线链路失败通知的方法的又一示意图;
图13是本申请实施例2的触发生成回传链路无线链路失败通知的方法的一示意图;
图14是本申请实施例3的触发生成回传链路无线链路失败通知的方法的一示意图;
图15是本申请实施例3的触发生成回传链路无线链路失败通知的方法的一示意图;
图16是本申请实施例3的触发生成回传链路无线链路失败通知的方法的一示意图;
图17是本申请实施例3的触发生成回传链路无线链路失败通知的方法的一示意图;
图18是本申请实施例3的触发生成回传链路无线链路失败通知的方法的一示意图;
图19是本申请实施例4的触发生成回传链路无线链路失败通知的装置的一示意图;
图20是本申请实施例4的第一触发单元的一示意图;
图21是本申请实施例4的第二触发单元的一示意图;
图22是本申请实施例5的触发生成回传链路无线链路失败通知的装置的一示意图;
图23是本申请实施例6的网络设备的系统构成的一示意框图;
图24是本申请实施例7的网络设备的系统构成的一示意框图;
图25是本申请实施例8的通信系统的一示意图;
图26是本申请实施例8的通信系统的另一示意图;
图27是本申请实施例8的通信系统的又一示意图。
具体实施方式
参照附图,通过下面的说明书,本发明的前述以及其它特征将变得明显。在说明书和附图中,具体公开了本发明的特定实施方式,其表明了其中可以采用本发明的原则的部分实施方式,应了解的是,本发明不限于所描述的实施方式,相反,本发明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以及未来的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用户设备接入通信网络并为该用户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:IAB架构下的“节点(node)”和/或“宿主(donor)”、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femto、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)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,也可以称为“终端设备”(TE,Terminal Equipment)。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。例如,IAB架构下的由IAB节点或IAB宿主服务的终端设备。
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。
在本申请实施例中,“当……时”、“在……情况下”、“对于……的情况”以及“如果……”都表示基于某个或某些条件或状态等,另外,这些表述方式可以互相替换。
以下通过示例对本申请实施例的场景进行说明,但本发明不限于此。
图1是本申请实施例的IAB整体架构的一示意图。如图1所示,该IAB整体架构使用独立(standalone,SA)模式;图2是本申请实施例的IAB整体架构的另一示意图。如图2所示,该IAB整体架构使用双连接(EN-DC)模式。在双连接模式中,IAB节点通过E-UTRA连接到一个MeNB,IAB宿主作为SgNB终止X2-C。
图3是IAB-DU和IAB-donor-CU间F1-U接口的协议栈的一示意图,图4是IAB-DU和IAB-donor-CU间F1-C接口的协议栈的一示意图,在图3和图4中,F1-U和F1-C以2跳回传为例进行说明。
在本申请实施例中,F1-U和F1-C使用IAB-DU和IAB-donor-CU间的IP传输层,另外,F1-U和F1-C有安全保护。
在本申请实施例中,在无线回传上,IP层通过回传适配协议(Backhaul Adaptation Protocol,BAP)子层传输,以确保多跳路由;IP层也可以用于非F1业务,例如操作维护管理(Operation Administration and Maintenance,OAM)业务。
在本申请实施例中,在每个回传链路(backhaul link)上,BAP PDUs由BH RLC信道(channel)传输;在每个BH链路(BH link)上,可以配置多个BH RLC信道,这样允许通信优先化(traffic prioritization)和QoS(Quality of Service,服务质量)实施(QoS enforcement)。
在本申请实施例中,每个IAB节点和IAB-donor-DU上的BAP实体执行BAP PDUs的BH RLC信道的映射。
在本申请实施例中,IAB-MT与IAB-donor-CU建立用于承载RRC和NAS的SRBs。图5是本申请实施例的IAB-MT与IAB-donor-CU间SRB的协议栈的一示意图。
在本申请实施例中,对于工作在EN-DC模式下的IAB节点,IAB-MT还与IAB-donor-CU建立一个或多个DRBs,可以用于例如传输OAM业务。对于SA模式,DRBs的建立是可选的。这些SRBs和DRBs经Uu接口信道在这个IAB-MT和它的父节点间传输。
以下,对本申请实施例的应用场景进行示例性的说明。
图6是本申请实施例的SA模式的单连接场景的一示意图。如图6所示,在SA模式下,第一IAB节点使用单连接与IAB宿主节点连接,第一IAB节点检测到了其与父IAB节点,即IAB宿主节点之间的回传链路的无线链路失败。
图7是本申请实施例的EN-DC模式的双连接场景的一示意图。如图7所示,在EN-DC模式下,第一IAB节点可以通过IAB宿主节点以及MeNB接入网络。另外,在EN-DC里,不支持E-UTRA无线接口上的backhauling业务。
例如,第一IAB节点检测到了与MeNB间的MCG RLF;
又例如,第一IAB节点检测到了与IAB宿主节点间的SCG RLF。
图8是本申请实施例的NR-DC模式的双连接场景的一示意图。如图8所示,在NR-DC模式下,第一IAB节点可以通过两个父IAB节点,即第三IAB节点以及第四 IAB节点接入网络,第三IAB节点为主节点,第四IAB节点为辅节点。
例如,第一IAB节点检测到了与第三IAB节点间的MCG RLF;
又例如,第一IAB节点检测到了与第四IAB节点间的SCG RLF。
在本申请实施例中,
下面结合附图对本申请实施例的各种实施方式进行说明。这些实施方式只是示例性的,不是对本发明的限制。
实施例1
本申请实施例提供了一种触发生成回传链路无线链路失败通知的方法,该方法用于第一IAB节点。
图9是本申请实施例1的触发生成回传链路无线链路失败通知的方法的一示意图。如图9所示,该方法包括:
步骤901:当检测到无线链路失败时,且当满足第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,
步骤902:基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,
步骤903:当满足第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。
这样,通过对触发回传链路无线链路失败通知的生成进行限制,能够避免RLF指示风暴,减少资源开销并降低安全风险。
在本申请实施例中,无线链路失败可以是回传链路的无线链路失败。
例如,回传链路是指IAB节点与其父IAB节点之间的回传链路;
例如,回传链路的无线链路失败可以由多种原因触发,例如,IAB节点或IAB-MT的主小区里定时器T310超时,或者,IAB节点或IAB-MT从其MAC收到随机接入问题指示同时定时器T300/T301/T304/T311/T319都未运行,或者,IAB节点或IAB-MT从其RLC收到已经达到最大重传数的指示,或者,IAB节点或IAB-MT从其父IAB节点收到type 4BH RLF指示,或者,IAB节点或IAB-MT从其MAC收到连续上行LBT失败指示等。
例如,Type 4BH RLF指示即Type 4/4X BH link RLF通知或指示,用来通知/指示恢复失败/指示子节点进行无线链路失败过程。当父IAB节点RRC重建过程失败时, 可以向IAB节点发送type 4BH RLF指示。
在本申请实施例中,该第一节点作为一个IAB节点连接,或者,该第一节点是IAB节点。
例如,该第一节点作为一个IAB节点连接,或者,该第一节点是IAB节点,包括以下中的至少一个:
在连接建立过程中,该第一节点作为一个IAB节点接入网络;
在增加和/或更新辅节点过程中,该第一节点作为一个IAB节点连接到辅节点;
该第一节点作为一个IAB节点为子节点或终端设备服务;
至少有一个连接的IAB节点作为该第一节点的子节点;以及
至少有一个连接的IAB节点已经与该第一节点建立了回传链路RLC信道。
在本申请实施例中,对于在连接建立过程中,该第一节点作为一个IAB节点接入网络的情况,
例如,在RRCSetupComplete消息里包括一个域,这个域用来指示这个连接是由IAB节点建立的,例如,域为iab-NodeIndication-r16;
例如,连接建立过程是这个节点集成(integration)过程的IAB-MT建立阶段或建立阶段的一部分。
在本申请实施例中,对于在增加和/或更新辅节点过程中,该第一节点作为一个IAB节点连接到辅节点的情况,
例如,增加辅节点过程可以是在以NSA模式工作的IAB集成过程的SgNB添加阶段;
例如,在SGNB ADDITION REQUEST消息或SGNB MODIFICATION REQUEST消息里包括一个IE,用来指示这个请求来自IAB节点,例如IE为IAB Node Indication。
在本申请实施例中,对于该第一节点作为一个IAB节点为子节点或终端设备服务的情况,例如,广播支持IAB,即在系统消息里包括一个IE或域,用来指示IAB的支持和/或IAB的小区状态,例如:
这个IE或域包括在NPN-IdentityInfo或PLMN-IdentityInfo里;
这个域可以是iab-support:当这个域存在(present)时,这个节点的小区支持IAB且小区也可看作IAB节点小区选择或重新选择的候选;当这个域不存在(absent)时, 这个节点的小区不支持IAB和/或小区对IAB节点禁止(bar);
例如,系统消息可以是SIB1。
在本申请实施例中,回传链路无线链路失败通知也可以称为回传链路无线链路失败指示或无线链路失败通知或无线链路失败指示等,用来向其子节点指示自己与父节点之间发生的无线链路失败,即回传链路上的无线链路失败。
在本申请实施例中,该回传链路无线链路失败通知可以是type 2或type 1无线链路失败通知。
例如,该type 2无线链路失败通知用来指示该第一节点检测到回传链路无线链路失败且所述第一节点正在尝试从该回传链路无线链路失败恢复,该type 1无线链路失败通知用来指示该第一节点检测到回传链路无线链路失败。
例如,该type 2或type 1无线链路失败通知通过BAP控制PDU携带。
以下,对本申请实施例的第一条件的内容进行说明。
在本申请实施例中,该第一条件可以包括:AS安全已经激活且SRB2已经建立。
AS安全已经激活指第一节点与其主节点或主IAB donor之间已经成功完成了初始安全激活过程。例如,图6中第一IAB节点与IAB donor之间已经成功完成了初始安全激活过程;图7中第一IAB节点与MeNB之间已经成功完成了初始安全激活过程;又例如,图8中第一IAB节点与IAB donor之间已经成功完成了初始安全激活过程。
在本申请实施例中,该第一条件还包括以下中的至少一个:
1)在该第一节点配置了和/或使用双连接且该无线链路失败是SCG无线链路失败的情况下,未发起或无法发起SCG失败信息过程;
2)在该第一节点配置了和/或使用双连接且该无线链路失败是MCG无线链路失败的情况下,未发起或无法发起MCG失败信息过程;以及
3)该第一节点正在进行切换或移植。
在本申请实施例中,对于上述1),该未发起或无法发起SCG失败信息过程包括以下中的至少一个:
无法通过F1接口消息把SCG失败信息上报给该第一节点的IAB宿主;
该双连接是NR-DC;以及
MCG传输被挂起,或者,发起了MCG失败信息过程。
例如,MCG传输被挂起,或者,发起了MCG失败信息过程,包括:
MCG或SCG都没有被挂起且配置了t316的情况下,当检测到MCG RLF同时配置了分裂(split)SRB1或SRB3的这个节点的T316没有运行;或MCG或SCG都没有被挂起的情况下,当检测到MCG RLF同时支持通过F1接口消息把MCG失败信息上报给IAB宿主。
在本申请实施例中,对于上述2),该未发起或无法发起MCG失败信息过程包括以下中的至少一个:
无法通过F1接口消息把MCG失败信息上报给该第一节点的IAB宿主;
未配置第一定时器;例如,该第一定时器是定时器T316;
SCG传输被挂起;以及
正在进行PSCell改变或PSCell增加。
例如,未配置定时器T316包括:这个节点未配置分裂(split)SRB1或SRB3;或者,这个节点配置了split SRB1和/或SRB3,但网络未指示定时器T316的值,即未包括域T316。
例如,SCG传输被挂起,包括:
发起了SCG失败信息传输:MCG传输或SCG传输未被挂起的情况下,检测到SCG RLF,或者,SCG的同步重配置(reconfiguration with sync)失败,或者,SCG配置失败,或者,SCG低层指示SRB3相关的完整性检查失败,或者,
发起了EUTRA SCG失败信息传输:在MCG传输或SCG传输未被挂起的情况下,检测到SCG RLF,或者,SCG改变(change)失败,或者,powerControlMode配置为1的情况下由于超过最大上行传输定时差(timing difference)停止向PSCell的上行传输。
例如,正在进行PSCell改变或PSCell增加,包括:
对于双连接是NR-DC的情况,NR PSCell的定时器T304正在运行;
例如,收到包括reconfigurationWithSync的RRCReconfiguration消息或条件重配置执行,即应用存储的包括了reconfigurationWithSync的RRCReconfiguration消息时,启动定时器T304,和/或,当成功完成在相应的特殊小区上的随机接入或SCG释放时,停止定时器T304。
对于双连接是NE-DC的情况,E-UTRA PSCell的定时器T307正在运行;
例如,收到包括MobilityControlInfoSCG的RRCConnectionReconfiguration消息时,启动定时器T304;和/或,当成功完成在PSCell上的随机接入,发起重建或SCG释放时,停止定时器T304。
在本申请实施例中,对于上述3),该第一节点正在进行切换或移植,包括:
在第二定时器正在运行的情况下,当使用两个协议栈分别与源父节点和目标父节点连接时,该两个协议栈(双协议栈)属于该第一节点的一个MT逻辑实体,或者,该两个协议栈(双协议栈)分别属于该第一节点的两个MT逻辑实体。
在本申请实施例中,第二定时器是定时器T304。
类似于DAPS,第一节点的一个MT逻辑实体包括2个协议栈,即存在2套单独的PHY、MAC和RLC,使用公共或单独的BAP。
在本申请实施例中,该两个协议栈(双协议栈)可以对应于回传链路RLC信道。
例如,使用该两个协议栈分别与源父节点和目标父节点连接表示配置了任意一个(any)双协议栈回传链路RLC信道;例如,IE BH-RLC-ChannelConfig里的第一域用来指示该第一节点与其父节点之间的一个BH RLC信道配置为双协议栈BH RLC信道,例如,该第一域是一个类似daps-Config-r16的域。
例如,IE BH-RLC-ChannelConfig里的第一域用来指示第一节点与其父节点之间的信道标识为第一索引和/或标识的一个BH RLC信道配置为双协议栈BH RLC信道。例如,第一索引可以是bh-LogicalChannelIdentity-r16或者bh-RLC-ChannelID-r16。
例如,将BH RLC信道ID为第一索引的一个BH RLC信道配置为双协议栈BH RLC信道;例如,配置BH RLC channel index=x的一个BH RLC信道为双协议栈BH RLC信道。
又例如,隐式指定一个BH RLC信道是双协议栈BH RLC信道,即不显式通过指示BH RLC信道的第一索引为双协议栈BH RLC信道。例如,将双协议栈BH RLC信道的配置信息包括在一个BH RLC信道的配置里,这样就是隐式指定这个BH RLC信道是双协议栈BH RLC信道。
在本申请实施例中,该两个协议栈(双协议栈)可以对应于RRC承载。
例如,使用该两个协议栈分别与源父节点和目标父节点连接表示配置了任意一个(any)双协议栈承载。
例如,IE DRB-ToAddMod里的第二域用来指示一个承载配置为双协议栈承载。 例如,该第二域是域daps-Config-r16。
例如,IE DRB-ToAddMod里的第二域用来指示承载标识为第二索引和/或标识的一个承载配置为双协议栈承载。例如,第二索引是drb-Identity。
例如,将承载ID为第二索引的一个承载配置为双协议栈承载;例如,配置承载ID=y的一个承载为双协议栈承载。
又例如,隐式指定一个承载是双协议栈承载,即不显式通过指示承载的第二索引为双协议栈承载。例如,将双协议栈承载的配置信息包括在一个承载的配置里,这样就是隐式指定这个承载是双协议栈承载。
在本申请实施例中,当该无线链路失败是源无线链路失败时,不触发回传链路无线链路失败通知的生成。
或者,当该无线链路失败是源无线链路失败时,触发回传链路无线链路失败通知的生成,例如,
当源PCell里未检测到无线链路失败,且MCG的第二定时器超时时,与源父节点连接的协议栈里,即源里触发type 3无线链路失败通知的生成;和/或,
当无线链路失败后成功恢复或者第一节点切换或移植成功完成时,与目标父节点连接的协议栈里,即目标里触发type 3无线链路失败通知的生成。
在本申请实施例中,该type 3无线链路失败通知指示回传链路从无线链路失败成功恢复,该type 3无线链路失败通知通过BAP控制PDU携带。
例如,该第一节点切换或移植成功完成,包括以下中的至少一个:
该第一节点同步到目标小区;
该第一节点在目标小区里成功完成随机接入;
该第一节点发送了RRCReconfigurationComplete消息;
该第一节点收到了一个L1或L2的显式指示,该指示用于指示双协议栈操作的源小区部分将要被停止和/或双协议栈配置的源小区部分将要被释放;以及
该第一节点与目标节点,例如目标父IAB节点显式请求的一样,已经释放了源小区。
在本申请实施例中,当该无线链路失败是目标无线链路失败时,例如,
当检测到目标无线链路失败时,且当满足该第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,
基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,或者,
当满足该第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。
也就是说,当检测到目标无线链路失败时,没有进一步的条件,而采用与图9所示的方法来触发或不触发生成回传链路无线链路失败通知;或者,当检测到目标无线链路失败时,适用该第一节点配置了和/或使用双连接且该无线链路失败是MCG无线链路失败的情况下的第一条件的内容。
在本申请实施例中,对于两个协议栈分别属于第一节点的两个MT逻辑实体的情况,根据与源父节点的无线链路失败或者根据与目标父节点的无线链路失败,触发或不触发生成回传链路无线链路失败通知,分别与单协议栈非切换期间触发一致。
例如,1)如果检测到的无线链路失败是第一节点与源父节点的源(里的)无线链路失败,即RLF in source或者source RLF,那么当检测到源(里的)无线链路失败时,且当满足第一条件时和/或基于定时器的状态,触发或不触发生成源(里的)回传链路无线链路失败通知;或者,基于定时器的状态,触发或不触发生成源(里的)回传链路无线链路失败通知,或者,当满足第一条件时,基于定时器的状态,触发或不触发生成源(里的)回传链路无线链路失败通知;和/或,2)当满足第二条件时,触发生成源(里的)回传链路无线链路失败通知,或者,当满足第二条件时,基于定时器的状态,触发或不触发生成源(里的)回传链路无线链路失败通知,所述第二条件包括以下中的至少一个:第一定时器超时;第二定时器超时;RRC连接重配置失败;以及收到来自低层的完整性检查失败指示。
又例如,1)如果检测到的无线链路失败是第一节点与目标父节点的目标(里的)无线链路失败,即RLF in target或者target RLF,那么当检测到目标(里的)无线链路失败时,且当满足第一条件时和/或基于定时器的状态,触发或不触发生成目标(里的)回传链路无线链路失败通知;或者,基于定时器的状态,触发或不触发生成目标(里的)回传链路无线链路失败通知,或者,当满足第一条件时,基于定时器的状态,触发或不触发生成目标(里的)回传链路无线链路失败通知;和/或,2)当满足第二条件时,触发生成目标(里的)回传链路无线链路失败通知,或者,当满足第二条件时,基于定时器的状态,触发或不触发生成目标(里的)回传链路无线链路失败通知,所述第二条件包括以下中的至少一个:第一定时器超时;第二定时器超时;RRC连 接重配置失败;以及收到来自低层的完整性检查失败指示。
源父节点和目标父节点可以是一个IAB节点,也可以是IAB宿主(IAB donor)。
具体的内容可以参考上面的记载,相同的内容不再重复说明。
以上,对本申请实施例中的第一条件进行了具体的说明。
在步骤901中,当检测到无线链路失败时,且当满足第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。例如,
图10是本申请实施例的1的触发生成回传链路无线链路失败通知的方法的另一示意图。如图10所示,该方法包括:
步骤1001:当检测到无线链路失败且满足该第一条件时,触发或生成或发送回传链路无线链路失败通知;或者,
步骤1002:当检测到无线链路失败时,并且,当第三定时器超时或未配置时,触发或生成或发送回传链路无线链路失败通知,或者,当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知;或者,
步骤1003:当检测到无线链路失败且满足该第一条件时,并且,当第三定时器超时或未配置时,触发或生成或发送回传链路无线链路失败通知,或者,当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
例如,该第三定时器是禁止定时器或迟滞定时器。
在本申请实施例中,当触发或生成或发送了一个回传链路无线链路失败通知时,启动或重启该第三定时器。
在本申请实施例中,该第一节点的RRC层或BAP层基于该第三定时器的状态,触发或不触发生成回传链路无线链路失败通知。
也就是说,第三定时器工作或维持在RRC层或BAP层。
例如,对于第三定时器工作或维持在RRC层的情况,RRC层考虑第三定时器的状态,例如,运行、超时、停止等,以确定是否指示BAP生成回传链路无线链路失败通知。
在本申请实施例中,如果第三定时器工作或维持在RRC层,那么RRC触发或不触发生成回传链路无线链路失败通知,例如RRC指示BAP生成回传链路无线链路失败通知,或RRC指示BAP不生成回传链路无线链路失败通知,或RRC不指示BAP生成回传链路无线链路失败通知。
例如,对于第三定时器工作或维持在BAP层的情况,当收到RRC层的指示或检测到RLF,BAP考虑这个定时器的状态,例如,运行、超时、停止等,以确定是否生成或发送一个回传链路无线链路失败通知。或者BAP考虑这个定时器的状态,例如,运行、超时、停止等,以确定是否取消已经触发的一个回传链路无线链路失败通知。
例如,对于仅考虑定时器状态的情况,BAP基于定时器的状态,生成/不生成或发送/不发送回传链路无线链路失败通知;
对于其他情况:检测到无线链路失败和/或第一条件满足时,RRC指示BAP生成回传链路无线链路失败通知;BAP基于RRC的指示和第三定时器状态,生成/不生成或发送/不发送回传链路无线链路失败通知;或者BAP考虑无线链路失败和/或第一条件满足,并基于定时器的状态,生成/不生成或发送/不发送回传链路无线链路失败通知。
在本申请实施例中,当满足以下条件中的至少一个时,停止该第三定时器:
收到RRCSetup消息、RRCRelease消息以及reconfigurationWithSync消息中的至少一个;
发起RRC连接重建过程;
进入RRC空闲状态(going to RRC_IDLE);
reconfigurationWithSync消息包括在MAC或SCG的spCellConfig消息里,且NR小区组的MAC成功完成了RA过程;
第二小区组释放或MR-DC释放;以及
重新配置该第三定时器。
在本申请实施例中,每IAB节点或每IAB-MT或每小区组(CG)或每用例(use case)配置/运行/维持一个该第三定时器。
也就是说,该第三定时器的粒度是基于IAB节点或IAB-MT或小区组或用例的。
对于该每IAB节点或每IAB-MT配置/运行/维持的第三定时器,即第三定时器的粒度是基于IAB节点或IAB-MT的情况,第三定时器的值可以是每IAB节点或每IAB-MT配置配置的,例如,第三定时器的值包括在IE BWP-UplinkDedicated里;
对于该每小区组(CG)配置/运行/维持的第三定时器,即第三定时器的粒度是基于小区组(CG)的情况,第三定时器的值可以是每小区组(CG)配置的,例如,第 三定时器的值包括在CellGroupConfig IE里,或者第三定时器的值可以是每IAB节点或每IAB-MT配置配置的,例如,第三定时器的值包括在IE BWP-UplinkDedicated里;
对于该每用例配置/运行/维持的第三定时器,即第三定时器的粒度是基于用例(use case)的情况,第三定时器的值可以是每用例配置的,例如,
对于RLF,例如,第三定时器的值包括在IE RLF-TimersAndConstants里;
对于HOF,例如,第三定时器的值包括在IE ReconfigurationWithSync里;
或者第三定时器的值可以是每小区组(CG)配置的,例如,第三定时器的值包括在CellGroupConfig IE里,或者第三定时器的值可以是每IAB节点或每IAB-MT配置配置的,例如,第三定时器的值包括在IE BWP-UplinkDedicated里;
另外,例如,该第三定时器的粒度是基于用例(use case)的仅适用于在判断触发或生成或发送回传链路无线链路失败通知的条件中包括第一条件以及第三定时器状态的情况;
另外,对于该每用例配置/运行/维持的第三定时器,即第三定时器的粒度是基于用例(use case)的情况,还包括第三X定时器用于RLF情况,第三Y定时器用于HOF情况。第三X定时器和第三Y定时器的粒度分别是基于IAB节点或IAB-MT或小区组,例如第三X定时器是基于小区组的,例如第三Y定时器是基于IAB节点或IAB-MT的。
在步骤902中,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。例如,
图11是本申请实施例1的触发生成回传链路无线链路失败通知的方法的又一示意图。如图11所示,该方法包括:
步骤1101:当第三定时器超时时,触发或生成或发送回传链路无线链路失败通知,或者,
步骤1102:当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
例如,当触发或生成或发送type 3回传链路无线链路失败通知时,或者,当检测到的无线链路失败被恢复时,停止该第三定时器。
例如,该type 3无线链路失败通知指示回传链路从无线链路失败成功恢复,该type  3无线链路失败通知通过BAP控制PDU携带。
另外,有关第三定时器的其他内容,可参见上面的记载,此处不再重复说明。
在步骤903中,当满足第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。例如,
图12是本申请实施例1的触发生成回传链路无线链路失败通知的方法的又一示意图。如图12所示,该方法包括:
步骤1201:当满足第一条件时,并且,当第三定时器超时时,触发或生成或发送回传链路无线链路失败通知,或者,
步骤1202:当满足第一条件时,并且,当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
例如,当触发或生成或发送type 3回传链路无线链路失败通知时,或者,当检测到的无线链路失败被恢复时,停止该第三定时器。
例如,该type 3无线链路失败通知指示回传链路从无线链路失败成功恢复,该type 3无线链路失败通知通过BAP控制PDU携带。
另外,有关第三定时器的其他内容,可参见上面的记载,此处不再重复说明。
在本申请实施例中,以下,以具体的场景为例进行说明。
场景1)在配置了双链接(DC)的情况下,检测到RLF时触发type 2 RLF指示的生成。
例如,当AS安全已经激活且SRB2已经建立时,如果作为一个IAB节点连接,触发低层发起BH RLF指示进程;
又例如,在该无线链路失败是SCG无线链路失败的情况下,未发起或无法发起SCG失败信息过程,如果作为一个IAB节点连接,触发低层发起BH RLF指示进程;
又例如,该无线链路失败是MCG无线链路失败的情况下,未发起或无法发起MCG失败信息过程,如果作为一个IAB节点连接,触发低层发起BH RLF指示进程。
新的标准例如是:
5.3.10.3 Detection of radio link failure
The UE shall:
1>if any DAPS bearer is configured and T304 is running:
2>upon T310 expiry in source SpCell; or
2>upon random access problem indication from source MCG MAC; or
2>upon indication from source MCG RLC that the maximum number of retransmissions has been reached; or
2>upon consistent uplink LBT failure indication from source MCG MAC:
3>consider radio link failure to be detected for the source MCG i.e. source RLF;
3>suspend the transmission and reception of all DRBs in the source MCG;
3>reset MAC for the source MCG;
3>release the source connection.
1>else:
2>during a DAPS handover: the following only applies for the target PCell;
2>upon T310 expiry in PCell; or
2>upon T312 expiry in PCell; or
2>upon random access problem indication from MCG MAC while neither T300, T301, T304, T311 nor T319 are running; or
2>upon indication from MCG RLC that the maximum number of retransmissions has been reached; or
2>if connected as an IAB-node, upon BH RLF indication received on BAP entity from the MCG; or
2>upon consistent uplink LBT failure indication from MCG MAC while T304 is not running:
3>if the indication is from MCG RLC and CA duplication is configured and activated for MCG, and for the corresponding logical channel allowedServingCells only includes SCell (s) :
4>initiate the failure information procedure as specified in 5.7.5 to report RLC failure.
3>else:
4>consider radio link failure to be detected for the MCG, i.e. MCG RLF;
4>discard any segments of segmented RRC messages stored according to 5.7.6.3;
NOTE: Void.
4>if AS security has not been activated:
5>perform the actions upon going to RRC_IDLE as specified in 5.3.11, with release cause 'other' ; -
4>else if AS security has been activated but SRB2 and at least one DRB or, for IAB, SRB2, have not been setup:
5>store the radio link failure information in the VarRLF-Report as described in subclause 5.3.10.5;
5>perform the actions upon going to RRC_IDLE as specified in 5.3.11, with release cause 'RRC connection failure';
4>else:
5> if connected as an IAB-node:
6> trigger the lower layer to initiate the BH RLF indication procedure;
5>store the radio link failure information in the VarRLF-Report as described in subclause 5.3.10.5;
5>if T316 is configured; and
5>if SCG transmission is not suspended; and
5>if neither PSCell change nor PSCell addition is ongoing (i.e. timer T304 for the NR PSCell is not running in case of NR-DC or timer T307 of the E-UTRA PSCell is not running as specified in TS 36.331 [10] , clause 5.3.10.10, in NE-DC) :
6>initiate the MCG failure information procedure as specified in 5.7.3b to report MCG radio link failure.
5>else:
6>initiate the connection re-establishment procedure as specified in 5.3.7.
The UE shall:
1>upon T310 expiry in PSCell; or
1>upon T312 expiry in PSCell; or
1>upon random access problem indication from SCG MAC; or
1>upon indication from SCG RLC that the maximum number of retransmissions has been reached; or
1>if connected as an IAB-node, upon BH RLF indication received on BAP entity from the SCG; or
1>upon consistent uplink LBT failure indication from SCG MAC:
2>if the indication is from SCG RLC and CA duplication is configured and activated for SCG, and for the corresponding logical channel allowedServingCells only includes SCell (s) :
3>initiate the failure information procedure as specified in 5.7.5 to report RLC failure.
2>else:
3>consider radio link failure to be detected for the SCG, i.e. SCG RLF;
3> if connected as an IAB-node:
4> trigger the lower layer to initiate the BH RLF indication procedure;
3>if MCG transmission is not suspended:
4>initiate the SCG failure information procedure as specified in 5.7.3 to report SCG radio link failure.
3>else:
4>if the UE is in NR-DC:
5>initiate the connection re-establishment procedure as specified in 5.3.7;
4>else (the UE is in (NG) EN-DC) :
5>initiate the connection re-establishment procedure as specified in TS 36.331 [10] , clause 5.3.7;
新的标准又例如是:
5.3.10.3 Detection of radio link failure
The UE shall:
1>if any DAPS bearer is configured and T304 is running:
2>upon T310 expiry in source SpCell; or
2>upon random access problem indication from source MCG MAC; or
2>upon indication from source MCG RLC that the maximum number of retransmissions has been reached; or
2>upon consistent uplink LBT failure indication from source MCG MAC:
3>consider radio link failure to be detected for the source MCG i.e. source RLF;
3>suspend the transmission and reception of all DRBs in the source MCG;
3>reset MAC for the source MCG;
3>release the source connection.
1>else:
2>during a DAPS handover: the following only applies for the target PCell;
2>upon T310 expiry in PCell; or
2>upon T312 expiry in PCell; or
2>upon random access problem indication from MCG MAC while neither T300, T301, T304, T311 nor T319 are running; or
2>upon indication from MCG RLC that the maximum number of retransmissions has been reached; or
2>if connected as an IAB-node, upon BH RLF indication received on BAP entity from the MCG; or
2>upon consistent uplink LBT failure indication from MCG MAC while T304 is not running:
3>if the indication is from MCG RLC and CA duplication is configured and activated for MCG, and for the corresponding logical channel allowedServingCells only includes SCell (s) :
4>initiate the failure information procedure as specified in 5.7.5 to report RLC failure.
3>else:
4>consider radio link failure to be detected for the MCG, i.e. MCG RLF;
4>discard any segments of segmented RRC messages stored according to 5.7.6.3;
NOTE: Void.
4>if AS security has not been activated:
5>perform the actions upon going to RRC_IDLE as specified in 5.3.11, with release cause 'other' ; -
4>else if AS security has been activated but SRB2 and at least one DRB or, for IAB, SRB2, have not been setup:
5>store the radio link failure information in the VarRLF-Report as described in subclause 5.3.10.5;
5>perform the actions upon going to RRC_IDLE as specified in 5.3.11, with release cause 'RRC connection failure' ;
4>else:
5>store the radio link failure information in the VarRLF-Report as described in subclause 5.3.10.5;
5>if T316 is configured; and
5>if SCG transmission is not suspended; and
5>if neither PSCell change nor PSCell addition is ongoing (i.e. timer T304 for the NR PSCell is not running in case of NR-DC or timer T307 of the E-UTRA PSCell is not running as specified in TS 36.331 [10] , clause 5.3.10.10, in NE-DC) :
6>initiate the MCG failure information procedure as specified in 5.7.3b to report MCG radio link failure.
5>else:
6>if connected as an IAB-node:
7>trigger the lower layer to initiate the BH RLF indication procedure;
6>initiate the connection re-establishment procedure as specified in 5.3.7.
The UE shall:
1>upon T310 expiry in PSCell; or
1>upon T312 expiry in PSCell; or
1>upon random access problem indication from SCG MAC; or
1>upon indication from SCG RLC that the maximum number of retransmissions has been reached; or
1>if connected as an IAB-node, upon BH RLF indication received on BAP entity from the SCG; or
1>upon consistent uplink LBT failure indication from SCG MAC:
2>if the indication is from SCG RLC and CA duplication is configured and activated for SCG, and for the corresponding logical channel allowedServingCells only includes SCell (s) :
3>initiate the failure information procedure as specified in 5.7.5 to report RLC failure.
2>else:
3>consider radio link failure to be detected for the SCG, i.e. SCG RLF;
3>if MCG transmission is not suspended:
4>initiate the SCG failure information procedure as specified in 5.7.3 to report SCG radio link failure.
3>else:
4>if the UE is in NR-DC:
5> if connected as an IAB-node:
6> trigger the lower layer to initiate the BH RLF indication procedure;
5>initiate the connection re-establishment procedure as specified in 5.3.7;
4>else (the UE is in (NG) EN-DC) :
5>initiate the connection re-establishment procedure as specified in TS 36.331 [10] , clause 5.3.7;
新的标准又例如是:
5.3.10.3 Detection of radio link failure
The UE shall:
1>if any DAPS bearer is configured and T304 is running:
2>upon T310 expiry in source SpCell; or
2>upon random access problem indication from source MCG MAC; or
2>upon indication from source MCG RLC that the maximum number of retransmissions has been reached;or
2>upon consistent uplink LBT failure indication from source MCG MAC:
3>consider radio link failure to be detected for the source MCG i.e. source RLF;
3>suspend the transmission and reception of all DRBs in the source MCG;
3>reset MAC for the source MCG;
3>release the source connection.
1>else:
2>during a DAPS handover: the following only applies for the target PCell;
2>upon T310 expiry in PCell; or
2>upon T312 expiry in PCell; or
2>upon random access problem indication from MCG MAC while neither T300, T301, T304, T311 nor T319 are running; or
2>upon indication from MCG RLC that the maximum number of retransmissions has been reached; or
2>if connected as an IAB-node, upon BH RLF indication received on BAP entity from the MCG; or
2>upon consistent uplink LBT failure indication from MCG MAC while T304 is not running:
3>if the indication is from MCG RLC and CA duplication is configured and activated for MCG, and for the corresponding logical channel allowedServingCells only includes SCell (s) :
4>initiate the failure information procedure as specified in 5.7.5 to report RLC failure.
3>else:
4>consider radio link failure to be detected for the MCG, i.e. MCG RLF;
4>discard any segments of segmented RRC messages stored according to 5.7.6.3;
NOTE: Void.
4>if AS security has not been activated:
5>perform the actions upon going to RRC_IDLE as specified in 5.3.11, with release cause 'other' ; -
4>else if AS security has been activated but SRB2 and at least one DRB or, for IAB, SRB2, have not been setup:
5>store the radio link failure information in the VarRLF-Report as described in subclause 5.3.10.5;
5>perform the actions upon going to RRC_IDLE as specified in 5.3.11, with release cause 'RRC connection failure';
4>else:
5>store the radio link failure information in the VarRLF-Report as described in subclause 5.3.10.5;
5>if T316 is configured; and
5>if SCG transmission is not suspended; and
5>if neither PSCell change nor PSCell addition is ongoing (i.e. timer T304 for the NR PSCell is not running in case of NR-DC or timer T307 of the E-UTRA PSCell is not running as specified in TS 36.331 [10] , clause 5.3.10.10, in NE-DC) :
6>initiate the MCG failure information procedure as specified in 5.7.3b to report MCG radio link failure.
5>else:
6> trigger the lower layer to initiate the BH RLF indication procedure;
6>initiate the connection re-establishment procedure as specified in 5.3.7.
The UE shall:
1>upon T310 expiry in PSCell; or
1>upon T312 expiry in PSCell; or
1>upon random access problem indication from SCG MAC; or
1>upon indication from SCG RLC that the maximum number of retransmissions has been reached; or
1>if connected as an IAB-node, upon BH RLF indication received on BAP entity from the SCG; or
1>upon consistent uplink LBT failure indication from SCG MAC:
2>if the indication is from SCG RLC and CA duplication is configured and activated for SCG, and for the corresponding logical channel allowedServingCells only includes SCell(s):
3>initiate the failure information procedure as specified in 5.7.5 to report RLC failure.
2>else:
3>consider radio link failure to be detected for the SCG, i.e. SCG RLF;
3>if MCG transmission is not suspended:
4>initiate the SCG failure information procedure as specified in 5.7.3 to report SCG radio link failure.
3>else:
4>if the UE is in NR-DC:
5> trigger the lower layer to initiate the BH RLF indication procedure;
5>initiate the connection re-establishment procedure as specified in 5.3.7;
4>else (the UE is in (NG) EN-DC) :
5>initiate the connection re-establishment procedure as specified in TS 36.331 [10] , clause 5.3.7;
在本申请实施例中,上述标准中的UE(用户设备)例如是IAB-MT。
另外,在本申请实施例中,上述标准中的通信系统可以包括UE(用户设备)和网络节点,其中,UE包括IAB-MT。
这样,在IAB节点配置了双连接或多连接的情况下,通过进一步限制type 2 RLF指示生成的条件,减少type 2 RLF指示的生成,从而避免双连接或多连接情况下RLF指示风暴,减少资源开销、降低安全风险。
场景2)DAPS HO期间检测到源RLF时触发type 2 RLF指示的生成。
新的标准例如是:
5.3.10.3 Detection of radio link failure
The UE shall:
1>if any DAPS bearer is configured and T304 is running:
2>upon T310 expiry in source SpCell; or
2>upon random access problem indication from source MCG MAC; or
2>upon indication from source MCG RLC that the maximum number of retransmissions has been reached; or
2>upon consistent uplink LBT failure indication from source MCG MAC:
3>consider radio link failure to be detected for the source MCG i.e. source RLF;
3>if connected as an IAB-node:
4>trigger the lower layer for the source MCG to initiate the BH RLF indication procedure;
3>suspend the transmission and reception of all DRBs in the source MCG;
3>reset MAC for the source MCG;
3>release the source connection.
此外,对于type 3 RLF指示的生成:
5.3.5.8.3 T304 expiry(Reconfiguration with sync Failure)
The UE shall:
1>if T304 of the MCG expires:
2>release dedicated preambles provided in rach-ConfigDedicated if configured;
2>release dedicated msgA PUSCH resources provided in rach-ConfigDedicated if configured;
2>if any DAPS bearer is configured,and radio link failure is not detected in the source PCell, according to subclause 5.3.10.3:
3>if connected as an IAB-node:
4>trigger the lower layer for the source MCG to initiate the BH RLF indication procedure;
3>reset MAC for the target PCell and release the MAC configuration for the target PCell;
3>for each DAPS bearer:
4>release the RLC entity or entities as specified in TS 38.322 [4] , clause 5.1.3, and the associated logical channel for the target PCell;
4>reconfigure the PDCP entity to release DAPS as specified in TS 38.323 [5] ;
3>for each SRB:
4>if the masterKeyUpdate was not received:
5>configure the PDCP entity for the source PCell with state variables continuation as specified in TS 38.323 [5] , the state variables as the PDCP entity for the target PCell;
4>release the PDCP entity for the target PCell;
4>release the RLC entity as specified in TS 38.322 [4] , clause 5.1.3, and the associated logical channel for the target PCell;
4>trigger the PDCP entity for the source PCell to perform SDU discard as specified in TS 38.323 [5] ;
4>re-establish the RLC entity for the source PCell;
3>release the physical channel configuration for the target PCell;
3>revert back to the SDAP configuration used in the source PCell;
3>discard the keys used in target PCell (the K gNB key, the K RRCenc key, the K RRCint key, the K UPint key and the K UPenc key) , if any;
3>resume suspended SRBs in the source PCell;
3>for each non DAPS bearer:
4>revert back to the UE configuration used for the DRB in the source PCell, includes PDCP, RLC states variables, the security configuration and the data stored in transmission and reception buffers in PDCP and RLC entities;
3>revert back to the UE measurement configuration used in the source PCell;
3>initiate the failure information procedure as specified in subclause 5.7.5 to report DAPS handover failure.
2>else:
3>revert back to the UE configuration used in the source PCell;
3>store the handover failure information in VarRLF-Report as described in the subclause 5.3.10.5;
3>initiate the connection re-establishment procedure as specified in subclause 5.3.7.
NOTE 1: In the context above, "the UE configuration" includes state variables and parameters of each radio bearer.
1>else if T304 of a secondary cell group expires:
2>if MCG transmission is not suspended:
3>release dedicated preambles provided in rach-ConfigDedicated, if configured;
3>initiate the SCG failure information procedure as specified in subclause 5.7.3 to report SCG reconfiguration with sync failure, upon which the RRC reconfiguration procedure ends;
2>else:
3>if the UE is in NR-DC:
4>initiate the connection re-establishment procedure as specified in subclause 5.3.7;
3>else (the UE is in (NG) EN-DC) :
4>initiate the connection re-establishment procedure as specified in TS 36.331 [10] , subclause 5.3.7;
1>else if T304 expires when RRCReconfiguration is received via other RAT (HO to NR failure) :
2>reset MAC;
2>perform the actions defined for this failure case as defined in the specifications applicable for the other RAT.
NOTE 2: In this clause, the term 'handover failure' has been used to refer to 'reconfiguration with sync failure' .
新的标准又例如是:
5.3.10.3 Detection of radio link failure
The UE shall:
1>if any DAPS bearer/ BH RLC channel is configured and T304 is running:
2>upon T310 expiry in source SpCell; or
2>upon random access problem indication from source MCG MAC; or
2>upon indication from source MCG RLC that the maximum number of retransmissions has been reached; or
2>upon consistent uplink LBT failure indication from source MCG MAC:
3>consider radio link failure to be detected for the source MCG i.e. source RLF;
3>if any DAPS BH RLC channel is configured:
4>trigger the lower layer for the source MCG to initiate the BH RLF indication procedure;
3>suspend the transmission and reception of all DRBs in the source MCG;
3>reset MAC for the source MCG;
3>release the source connection.
此外,对于type 3 RLF指示的生成:
5.3.5.8.3 T304 expiry (Reconfiguration with sync Failure)
The UE shall:
1>if T304 of the MCG expires:
2>release dedicated preambles provided in rach-ConfigDedicated if configured;
2>release dedicated msgA PUSCH resources provided in rach-ConfigDedicated if configured;
2>if any DAPS bearer is configured,and radio link failure is not detected in the source PCell, according to subclause 5.3.10.3:
3>reset MAC for the target PCell and release the MAC configuration for the target PCell;
3>if any DAPS BH RLC channel is configured:
4>trigger the lower layer for the source MCG to initiate the BH RLF indication procedure;
3>for each DAPS bearer:
4>release the RLC entity or entities as specified in TS 38.322 [4] , clause 5.1.3, and the associated logical channel for the target PCell;
4>reconfigure the PDCP entity to release DAPS as specified in TS 38.323 [5] ;
3>for each SRB:
4>if the masterKeyUpdate was not received:
5>configure the PDCP entity for the source PCell with state variables continuation as specified in TS 38.323 [5] , the state variables as the PDCP entity for the target PCell;
4>release the PDCP entity for the target PCell;
4>release the RLC entity as specified in TS 38.322 [4] , clause 5.1.3, and the associated logical channel for the target PCell;
4>trigger the PDCP entity for the source PCell to perform SDU discard as specified in TS 38.323 [5] ;
4>re-establish the RLC entity for the source PCell;
3>release the physical channel configuration for the target PCell;
3>revert back to the SDAP configuration used in the source PCell;
3>discard the keys used in target PCell (the K gNB key, the K RRCenc key, the K RRCint key, the K UPint key and the K UPenc key) , if any;
3>resume suspended SRBs in the source PCell;
3>for each non DAPS bearer:
4>revert back to the UE configuration used for the DRB in the source PCell, includes PDCP, RLC states variables, the security configuration and the data stored in transmission and reception buffers in PDCP and RLC entities;
3>revert back to the UE measurement configuration used in the source PCell;
3>initiate the failure information procedure as specified in subclause 5.7.5 to report DAPS handover failure.
2>else:
3>revert back to the UE configuration used in the source PCell;
3>store the handover failure information in VarRLF-Report as described in the subclause 5.3.10.5;
3>initiate the connection re-establishment procedure as specified in subclause 5.3.7.
NOTE 1: In the context above, "the UE configuration" includes state variables and parameters of each radio bearer.
1>else if T304 of a secondary cell group expires:
2>if MCG transmission is not suspended:
3>release dedicated preambles provided in rach-ConfigDedicated, if configured;
3>initiate the SCG failure information procedure as specified in subclause 5.7.3 to report SCG reconfiguration with sync failure, upon which the RRC reconfiguration procedure ends;
2>else:
3>if the UE is in NR-DC:
4>initiate the connection re-establishment procedure as specified in subclause 5.3.7;
3>else (the UE is in (NG) EN-DC) :
4>initiate the connection re-establishment procedure as specified in TS 36.331 [10] , subclause 5.3.7;
1>else if T304 expires when RRCReconfiguration is received via other RAT (HO to NR failure) :
2>reset MAC;
2>perform the actions defined for this failure case as defined in the specifications applicable for the other RAT.
NOTE 2: In this clause, the term 'handover failure' has been used to refer to 'reconfiguration with sync failure' .
这样,在IAB节点进行DAPS切换或移植的情况下,通过进一步限制type 2 RLF指示生成的条件,减少type 2 RLF指示的生成,从而避免源侧RLF指示风暴,减少资源开销、降低安全风险。
由上述实施例可知,通过对触发回传链路无线链路失败通知的生成进行限制,能够避免RLF指示风暴,减少资源开销并降低安全风险。
实施例2
本申请实施例提供了一种触发生成回传链路无线链路失败通知的方法,该方法应用于第一节点。
图13是本申请实施例2的触发生成回传链路无线链路失败通知的方法的一示意图。如图13所示,该方法包括:
步骤1301:当满足第二条件时,触发生成回传链路无线链路失败通知,或者,
步骤1302:当满足第二条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,
该第二条件包括以下中的至少一个:
第一定时器超时;
第二定时器超时;
RRC连接重配置失败;以及
收到来自低层的完整性检查失败指示。
在本申请实施例中,该第一定时器是定时器T316,和/或,该第二定时器是定时器T304。
例如,仅当IAB节点或IAB-MT配置了分裂SRB1或SRB3时,网络配置该第一定时器的值。
例如,当发送或传输MCGFailureInformation消息时,启动该第一定时器。
例如,当收到RRCRelease消息、有PCell的reconfigurationwithSync的RRCReconfiguration消息或MobilityFromNRCommand消息时;或者,当发起RRC连 接重建过程时,停止该第一定时器。
在本申请实施例中,该第二定时器超时,包括:
在RRCReconfiguration消息不是从其他RAT收到的情况下,
MCG的第二定时器超时,且没有配置任何DAPS承载或双协议栈回传链路RLC信道;或者,源PCell里检测到无线链路失败;或者,
SCG的第二定时器超时,且使用NR-DC且MCG传输被挂起。
在本申请实施例中,当收到包括reconfigurationWithSync的RRCReconfiguration消息或条件重配置执行消息时,启动该第二定时器。
在本申请实施例中,当成功完成在相应的特殊小区上的随机接入或SCG释放时,停止该第二定时器。
在本申请实施例中,该RRC连接重配置失败,包括:
在RRCReconfiguration通过NR收到且IAB节点或IAB-MT不是EN-DC的情况下,
IAB节点或IAB-MT使用NR SA、NE-DC或NR-DC,IAB节点或IAB-MT不能遵循(comply)包括在经SRB1接收的RRCReconfiguration消息里的部分配置或内嵌的SCG配置或部分MCG配置与部分SCG配置的组合或内嵌的V2X sidelink配置,或高层指示nas-Container无效(invalid);且已经激活了AS安全并已经建立了SRB2;和/或,
IAB节点或IAB-MT使用NR SA或NR-DC,IAB节点或IAB-MT不能遵循(comply)包括在经SRB3接收的RRCReconfiguration消息里的部分配置且MCG传输被挂起。
在本申请实施例中,该来自低层的完整性检查失败指示,包括以下中的至少一个:
来自物理层的例如DCI或PDCCH完整性检查失败;
来自MAC子层的MAC CE完整性检查失败,例如,SCell激活MAC CE完整性检查失败;
来自RLC子层的例如RLC控制PDU完整性检查失败;以及
来自BAP子层的例如BAP控制PDU完整性检查失败。
在本申请实施例中,该第一节点作为一个IAB节点连接,或者,该第一节点是IAB节点。
在本申请实施例中,该回传链路无线链路失败通知是type 2无线链路失败通知。
在本申请实施例中,当满足第二条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,包括:
当满足该第二条件时,并且,当第四定时器超时或未配置时,触发或生成或发送回传链路无线链路失败通知,或者,当第四定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
在本申请实施例中,当触发或生成或发送了一个回传链路无线链路失败通知时,启动或重启该第四定时器。
在本申请实施例中,该第一节点的RRC层或BAP层基于该第四定时器的状态,触发或不触发生成回传链路无线链路失败通知。
在本申请实施例中,当满足以下条件中的至少一个时,停止该第四定时器:
收到RRCSetup消息、RRCRelease消息以及reconfigurationWithSync消息中的至少一个;
发起RRC连接重建过程;
进入RRC空闲状态(going to RRC_IDLE);
reconfigurationWithSync消息包括在MAC或SCG的spCellConfig消息里,且NR小区组的MAC成功完成了RA过程;
第二小区组释放或MR-DC释放;以及
重新配置该第四定时器。
在本申请实施例中,每IAB节点或每IAB-MT或每小区组或每用例配置一个该第四定时器。
在本申请实施例中,该第四定时器是禁止定时器或迟滞定时器。
在本申请实施例中,与实施例1相同或相关的内容可以参照实施例1中的记载,此处不再重复说明。
由上述实施例可知,通过对触发回传链路无线链路失败通知的生成进行限制,能够避免RLF指示风暴,减少资源开销并降低安全风险。
实施例3
本申请实施例提供了一种触发生成回传链路无线链路失败通知的方法,该方法用于第一节点,即第一IAB节点、该第一IAB节点的子IAB节点以及第一IAB节点的 父IAB节点。该方法对应于实施例1所述的方法。
图14是本申请实施例3的触发生成回传链路无线链路失败通知的方法的一示意图。如图14所示,该方法包括:
步骤1401:第一IAB节点的MT检测到第一IAB节点与其父IAB节点之间的回传链路的无线链路失败;
步骤1402:当满足第一条件时,触发生成回传链路无线链路失败通知;
步骤1403:第一IAB节点的DU向第一IAB节点的子IAB节点发送回传链路无线链路失败通知。
图15是本申请实施例3的触发生成回传链路无线链路失败通知的方法的一示意图。如图15所示,该方法包括:
步骤1501:第一IAB节点的MT检测到第一IAB节点与其父IAB节点之间的回传链路的无线链路失败;
步骤1502:基于定时器的状态,触发生成回传链路无线链路失败通知;
步骤1503:第一IAB节点的DU向第一IAB节点的子IAB节点发送回传链路无线链路失败通知。
图16是本申请实施例3的触发生成回传链路无线链路失败通知的方法的一示意图。如图16所示,该方法包括:
步骤1601:第一IAB节点的MT检测到第一IAB节点与其父IAB节点之间的回传链路的无线链路失败;
步骤1602:当满足第一条件时,基于定时器的状态,触发生成回传链路无线链路失败通知;
步骤1603:第一IAB节点的DU向第一IAB节点的子IAB节点发送回传链路无线链路失败通知。
图17是本申请实施例3的触发生成回传链路无线链路失败通知的方法的一示意图。如图17所示,该方法包括:
步骤1701:基于定时器的状态,触发生成回传链路无线链路失败通知;
步骤1702:第一IAB节点的DU向第一IAB节点的子IAB节点发送回传链路无线链路失败通知。
图18是本申请实施例3的触发生成回传链路无线链路失败通知的方法的一示意 图。如图18所示,该方法包括:
步骤1801:当满足第一条件时,基于定时器的状态,触发生成回传链路无线链路失败通知;
步骤1802:第一IAB节点的DU向第一IAB节点的子IAB节点发送回传链路无线链路失败通知。
在本申请实施例中,上述各个步骤的具体实现方法可以参考实施例1中的记载,此处不再重复说明。
由上述实施例可知,通过对触发回传链路无线链路失败通知的生成进行限制,能够避免RLF指示风暴,减少资源开销并降低安全风险。
实施例4
本申请实施例提供一种触发生成回传链路无线链路失败通知的装置,该装置用于第一节点。该装置对应于实施例1所述的方法。
图19是本申请实施例4的触发生成回传链路无线链路失败通知的装置的一示意图。如图19所示,装置1900包括:
第一触发单元1901,其当检测到无线链路失败时,且当满足第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,
第二触发单元1902,其基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,
第三触发单元1903,其当满足第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。
在本申请实施例中,该第一节点作为一个IAB节点连接,或者,该第一节点是IAB节点。
在本申请实施例中,该第一节点作为一个IAB节点连接,或者,该第一节点是IAB节点,包括以下中的至少一个:
在连接建立过程中,该第一节点作为一个IAB节点接入网络;
在增加和/或更新辅节点过程中,该第一节点作为一个IAB节点连接到辅节点;
该第一节点作为一个IAB节点为子节点或终端设备服务;
至少有一个连接的IAB节点作为该第一节点的子节点;以及
至少有一个连接的IAB节点已经与该第一节点建立了回传链路RLC信道。
在本申请实施例中,该第一条件包括:AS安全已经激活且SRB2已经建立。
在本申请实施例中,该第一条件还包括以下中的至少一个:
在该第一节点配置了和/或使用双连接且该无线链路失败是SCG无线链路失败的情况下,未发起或无法发起SCG失败信息过程;
在该第一节点配置了和/或使用双连接且该无线链路失败是MCG无线链路失败的情况下,未发起或无法发起MCG失败信息过程;以及
该第一节点正在进行切换或移植。
在本申请实施例中,该未发起或无法发起SCG失败信息过程包括以下中的至少一个:
无法通过F1接口消息把SCG失败信息上报给该第一节点的IAB宿主;
该双连接是NR-DC;以及
MCG传输被挂起,或者,发起了MCG失败信息过程。
在本申请实施例中,该未发起或无法发起MCG失败信息过程包括以下中的至少一个:
无法通过F1接口消息把MCG失败信息上报给该第一节点的IAB宿主;
未配置第一定时器;
SCG传输被挂起;以及
正在进行PSCell改变或PSCell增加。
在本申请实施例中,该第一节点正在进行切换或移植,包括:
在第二定时器正在运行的情况下,当使用两个协议栈分别与源父节点和目标父节点连接时,该两个协议栈属于该第一节点的一个MT逻辑实体。
在本申请实施例中,该第一节点正在进行切换或移植,包括:
在第二定时器正在运行的情况下,当使用两个协议栈分别与源父节点和目标父节点连接时,该两个协议栈分别属于该第一节点的两个MT逻辑实体。
在本申请实施例中,该两个协议栈对应于回传链路RLC信道。
在本申请实施例中,使用该两个协议栈分别与源父节点和目标父节点连接表示配置了任意一个双协议栈回传链路RLC信道。
例如,IE BH-RLC-ChannelConfig里的第一域用来指示该第一节点与其父节点之间的一个BH RLC信道配置为双协议栈BH RLC信道。
在本申请实施例中,该两个协议栈对应于RRC承载。
在本申请实施例中,使用该两个协议栈分别与源父节点和目标父节点连接表示配置了任意一个双协议栈承载。
例如,IE DRB-ToAddMod里的第二域用来指示一个承载配置为双协议栈承载。
在本申请实施例中,当该无线链路失败是源无线链路失败时,不触发回传链路无线链路失败通知的生成。
在本申请实施例中,当该无线链路失败是源无线链路失败时,触发回传链路无线链路失败通知的生成,其中,
当源PCell里未检测到无线链路失败,且MCG的第二定时器超时时,与源父节点连接的协议栈里触发type 3无线链路失败通知的生成;和/或,
当无线链路失败后成功恢复或者第一节点切换或移植成功完成时,与目标父节点连接的协议栈里触发type 3无线链路失败通知的生成。
在本申请实施例中,该type 3无线链路失败通知指示回传链路从无线链路失败成功恢复,该type 3无线链路失败通知通过BAP控制PDU携带。
在本申请实施例中,该第一节点切换或移植成功完成,包括以下中的至少一个:
该第一节点同步到目标小区;
该第一节点在目标小区里成功完成随机接入;
该第一节点发送了RRCReconfigurationComplete消息;
该第一节点收到了一个L1或L2的显式指示,该指示用于指示双协议栈操作的源小区部分将要被停止和/或双协议栈配置的源小区部分将要被释放;以及
该第一节点与目标节点显式请求的一样,已经释放了源小区。
在本申请实施例中,当该无线链路失败是目标无线链路失败时,
当检测到目标无线链路失败时,且当满足该第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,
基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,或者,
当满足该第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。
图20是本申请实施例4的第一触发单元的一示意图。如图20所示,第一触发单元1901包括:
第四触发单元2001,其当检测到无线链路失败且满足该第一条件时,触发或生成或发送回传链路无线链路失败通知;或者,
第五触发单元2002,其当检测到无线链路失败时,并且,当第三定时器超时或未配置时,触发或生成或发送回传链路无线链路失败通知,或者,当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知;或者,
第六触发单元2003,其当检测到无线链路失败且满足该第一条件时,并且,当第三定时器超时或未配置时,触发或生成或发送回传链路无线链路失败通知,或者,当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
图21是本申请实施例4的第二触发单元的一示意图。如图21所示,第二触发单元1902包括:
第七触发单元2101,其当第三定时器超时时,触发或生成或发送回传链路无线链路失败通知,或者,
第八触发单元2102,其当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
在本申请实施例中,当触发或生成或发送type 3回传链路无线链路失败通知时,或者,当检测到的无线链路失败被恢复时,停止该第三定时器。
在本申请实施例中,第三触发单元1903包括:
第九触发单元,其当满足第一条件时,并且,当第三定时器超时时,触发或生成或发送回传链路无线链路失败通知,或者,
第十触发单元,其当满足第一条件时,并且,当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
在本申请实施例中,当触发或生成或发送type 3回传链路无线链路失败通知时,或者,当检测到的无线链路失败被恢复时,停止该第三定时器。
在本申请实施例中,当触发或生成或发送了一个回传链路无线链路失败通知时,启动或重启该第三定时器。
在本申请实施例中,该第一节点的RRC层或BAP层基于该第三定时器的状态,触发或不触发生成回传链路无线链路失败通知。
在本申请实施例中,当满足以下条件中的至少一个时,停止该第三定时器:
收到RRCSetup消息、RRCRelease消息以及reconfigurationWithSync消息中的至 少一个;
发起RRC连接重建过程;
进入RRC空闲状态(going to RRC_IDLE);
reconfigurationWithSync消息包括在MAC或SCG的spCellConfig消息里,且NR小区组的MAC成功完成了RA过程;
第二小区组释放或MR-DC释放;以及
重新配置该第三定时器。
在本申请实施例中,每IAB节点或每IAB-MT或每小区组或每用例配置一个该第三定时器。
在本申请实施例中,该第三定时器是禁止定时器或迟滞定时器。
在本申请实施例中,该回传链路无线链路失败通知是type 2或type 1无线链路失败通知。
在本申请实施例中,该type 2无线链路失败通知用来指示该第一节点检测到回传链路无线链路失败且该第一节点正在尝试从该回传链路无线链路失败恢复,
该type 1无线链路失败通知用来指示该第一节点检测到回传链路无线链路失败,
该type 2或type 1无线链路失败通知通过BAP控制PDU携带。
在本申请实施例中,该第一定时器是定时器T316。
在本申请实施例中,该第二定时器是定时器T304。
在本申请实施例中,上述各个单元的功能的实现可以参照实施例1中相关步骤的实现方法,此处不再重复说明。
由上述实施例可知,通过对触发回传链路无线链路失败通知的生成进行限制,能够避免RLF指示风暴,减少资源开销并降低安全风险。
实施例5
本申请实施例提供一种触发生成回传链路无线链路失败通知的装置,该装置用于第一节点。该装置对应于实施例2所述的方法。
图22是本申请实施例5的触发生成回传链路无线链路失败通知的装置的一示意图。如图22所示,装置2200包括:
第十一触发单元2201,其当满足第二条件时,触发生成回传链路无线链路失败通知,或者,
第十二触发单元2202,其当满足第二条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,
该第二条件包括以下中的至少一个:
第一定时器超时;
第二定时器超时;
RRC连接重配置失败;以及
收到来自低层的完整性检查失败指示。
在本申请实施例中,仅当IAB节点或IAB-MT配置了分裂SRB1或SRB3时,网络配置该第一定时器的值。
在本申请实施例中,当发送或传输MCGFailureInformation消息时,启动该第一定时器。
在本申请实施例中,当收到RRCRelease消息、有PCell的reconfigurationwithSync的RRCReconfiguration消息或MobilityFromNRCommand消息时;或者,当发起RRC连接重建过程时,停止该第一定时器。
在本申请实施例中,该第二定时器超时,包括:
在RRCReconfiguration消息不是从其他RAT收到的情况下,
MCG的第二定时器超时,且没有配置任何DAPS承载或双协议栈回传链路RLC信道;或者,源PCell里检测到无线链路失败;或者,
SCG的第二定时器超时,且使用NR-DC且MCG传输被挂起。
在本申请实施例中,当收到包括reconfigurationWithSync的RRCReconfiguration消息或条件重配置执行消息时,启动该第二定时器。
在本申请实施例中,当成功完成在相应的特殊小区上的随机接入或SCG释放时,停止该第二定时器。
在本申请实施例中,该RRC连接重配置失败,包括:
在RRCReconfiguration通过NR收到且IAB节点或IAB-MT不是EN-DC的情况下,
IAB节点或IAB-MT使用NR SA、NE-DC或NR-DC,IAB节点或IAB-MT不能遵循包括在经SRB1接收的RRCReconfiguration消息里的部分配置或内嵌的SCG配置或部分MCG配置与部分SCG配置的组合或内嵌的V2X sidelink配置,或高层指示 nas-Container无效;且已经激活了AS安全并已经建立了SRB2;和/或,
IAB节点或IAB-MT使用NR SA或NR-DC,IAB节点或IAB-MT不能遵循包括在经SRB3接收的RRCReconfiguration消息里的部分配置且MCG传输被挂起。
在本申请实施例中,该来自低层的完整性检查失败指示,包括以下中的至少一个:
来自物理层的DCI或PDCCH完整性检查失败;
来自MAC子层的MAC CE完整性检查失败;
来自RLC子层的RLC控制PDU完整性检查失败;以及
来自BAP子层的BAP控制PDU完整性检查失败。
在本申请实施例中,该第一节点作为一个IAB节点连接,或者,该第一节点是IAB节点。
在本申请实施例中,该第一定时器是定时器T316,和/或,该第二定时器是定时器T304。
在本申请实施例中,该回传链路无线链路失败通知是type 2无线链路失败通知。
在本申请实施例中,第十二触发单元当满足该第二条件时,并且,当第四定时器超时或未配置时,触发或生成或发送回传链路无线链路失败通知,或者,当第四定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
在本申请实施例中,当触发或生成或发送了一个回传链路无线链路失败通知时,启动或重启该第四定时器。
在本申请实施例中,该第一节点的RRC层或BAP层基于该第四定时器的状态,触发或不触发生成回传链路无线链路失败通知。
在本申请实施例中,当满足以下条件中的至少一个时,停止该第四定时器:
收到RRCSetup消息、RRCRelease消息以及reconfigurationWithSync消息中的至少一个;
发起RRC连接重建过程;
进入RRC空闲状态(going to RRC_IDLE);
reconfigurationWithSync消息包括在MAC或SCG的spCellConfig消息里,且NR小区组的MAC成功完成了RA过程;
第二小区组释放或MR-DC释放;以及
重新配置该第四定时器。
在本申请实施例中,每IAB节点或每IAB-MT或每小区组或每用例配置一个该第四定时器。
在本申请实施例中,该第四定时器是禁止定时器或迟滞定时器。
由上述实施例可知,通过对触发回传链路无线链路失败通知的生成进行限制,能够避免RLF指示风暴,减少资源开销并降低安全风险。
实施例6
本申请实施例提供了一种网络设备,该网络设备包括如实施例4所述的触发生成回传链路无线链路失败通知的发送装置。
图23是本申请实施例6的网络设备的系统构成的一示意框图。如图23所示,网络设备2300可以包括:处理器(processor)2310和存储器2320;存储器2320耦合到处理器2310。其中该存储器2320可存储各种数据;此外还存储信息处理的程序2330,并且在处理器2310的控制下执行该程序2330,以接收终端设备发送的各种信息、并且向终端设备发送各种信息。
在一个实施方式中,触发生成回传链路无线链路失败通知的装置的功能可以被集成到处理器2310中。
例如,处理器2310可以被配置为:当检测到无线链路失败时,且当满足第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,当满足第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。
在另一个实施方式中,触发生成回传链路无线链路失败通知的装置可以与处理器2310分开配置,例如可以将触发生成回传链路无线链路失败通知的装置配置为与处理器2310连接的芯片,通过处理器2310的控制来实现触发生成回传链路无线链路失败通知的装置的功能。
此外,如图23所示,网络设备2300还可以包括:收发机2340和天线2350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,网络设备2300也并不是必须要包括图23中所示的所有部件;此外,网络设备2300还可以包括图23中没有示出的部件,可以参考现有技术。
由上述实施例可知,通过对触发回传链路无线链路失败通知的生成进行限制,能够避免RLF指示风暴,减少资源开销并降低安全风险。
实施例7
本申请实施例提供了一种网络设备,该网络设备包括如实施例5所述的触发生成回传链路无线链路失败通知的发送装置。
图24是本申请实施例7的网络设备的系统构成的一示意框图。如图24所示,网络设备2400可以包括:处理器(processor)2410和存储器2420;存储器2420耦合到处理器2410。其中该存储器2420可存储各种数据;此外还存储信息处理的程序2430,并且在处理器2410的控制下执行该程序2430,以接收终端设备发送的各种信息、并且向终端设备发送各种信息。
在一个实施方式中,触发生成回传链路无线链路失败通知的装置的功能可以被集成到处理器2410中。
例如,处理器2410可以被配置为:当满足第二条件时,触发生成回传链路无线链路失败通知,或者,当满足第二条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,该第二条件包括以下中的至少一个:第一定时器超时;第二定时器超时;RRC连接重配置失败;以及收到来自低层的完整性检查失败指示。
在另一个实施方式中,触发生成回传链路无线链路失败通知的装置可以与处理器2410分开配置,例如可以将触发生成回传链路无线链路失败通知的装置配置为与处理器2410连接的芯片,通过处理器2410的控制来实现触发生成回传链路无线链路失败通知的装置的功能。
此外,如图24所示,网络设备2400还可以包括:收发机2440和天线2450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,网络设备2400也并不是必须要包括图24中所示的所有部件;此外,网络设备2400还可以包括图24中没有示出的部件,可以参考现有技术。
由上述实施例可知,通过对触发回传链路无线链路失败通知的生成进行限制,能够避免RLF指示风暴,减少资源开销并降低安全风险。
实施例8
本申请实施例提供了一种通信系统,该通信系统包括实施例6所述的网络设备或实施例7所述的网络设备。
图25是本申请实施例8的通信系统的一示意图。如图25所示,通信系统2500包括:第一IAB节点2501、第一IAB节点的子IAB节点2502、第一IAB节点服务 的终端设备2503、第一IAB节点的父IAB节点2504,即IAB宿主节点。
例如,第一IAB节点2501可以是实施例6所述的网络设备或实施例7所述的网络设备。
例如,第一IAB节点2501检测到了其与父IAB节点2504,即IAB宿主节点之间的回传链路的无线链路失败。
图26是本申请实施例8的通信系统的另一示意图。如图26所示,通信系统2600采用的是EN-DC构架,通信系统2600包括:第一IAB节点2601、第一IAB节点的子IAB节点2602、第一IAB节点服务的终端设备2603、IAB宿主节点2604以及MeNB2605。第一IAB节点2601可以通过IAB宿主节点2604以及MeNB2605接入网络。
例如,第一IAB节点2601可以是实施例6所述的网络设备或实施例7所述的网络设备。
例如,第一IAB节点2601检测到了与MeNB2605间的MCG RLF;
又例如,第一IAB节点2601检测到了与IAB宿主节点2604间的SCG RLF。
图27是本申请实施例8的通信系统的又一示意图。如图27所示,通信系统2700采用的是NR-DC构架,通信系统2700包括:第一IAB节点2701、第一IAB节点的子IAB节点2702、第一IAB节点服务的终端设备2703、第一IAB节点的第一父IAB节点2704和第二父IAB节点2705、IAB宿主节点2706。第一IAB节点2701可以通过第一父IAB节点2704和第二父IAB节点2705接入网络。第一父IAB节点2704为主节点,第二父IAB节点2705为辅节点。
例如,第一IAB节点2701可以是实施例6所述的网络设备或实施例7所述的网络设备。
例如,第一IAB节点2701检测到了与第一父IAB节点2704间的MCG RLF;
又例如,第一IAB节点2701检测到了第二父IAB节点2705间的SCG RLF。
以上是对应用本申请实施例的抢占缓存状态报告的生成方法及装置的IAB架构的示例,其也可以适用于其他各种IAB架构下的通信系统结构。
由上述实施例可知,通过对触发回传链路无线链路失败通知的生成进行限制,能够避免RLF指示风暴,减少资源开销并降低安全风险。
以上结合具体的实施方式对本发明进行了描述,但本领域技术人员应该清楚,这些描述都是示例性的,并不是对本发明保护范围的限制。本领域技术人员可以根据本 发明的精神和原理对本发明做出各种变型和修改,这些变型和修改也在本发明的范围内。
根据本申请实施例公开的各种实施方式,还公开了如下附记:
附记一
1、一种触发生成回传链路无线链路失败通知的装置,所述装置应用于第一节点,所述装置包括:
第一触发单元,其当检测到无线链路失败时,且当满足第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,
第二触发单元,其基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,
第三触发单元,其当满足第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。
2、根据附记1所述的装置,其中,
所述第一节点作为一个IAB节点连接,或者,所述第一节点是IAB节点。
3、根据附记2所述的装置,其中,所述第一节点作为一个IAB节点连接,或者,所述第一节点是IAB节点,包括以下中的至少一个:
在连接建立过程中,所述第一节点作为一个IAB节点接入网络;
在增加和/或更新辅节点过程中,所述第一节点作为一个IAB节点连接到辅节点;
所述第一节点作为一个IAB节点为子节点或终端设备服务;
至少有一个连接的IAB节点作为所述第一节点的子节点;以及
至少有一个连接的IAB节点已经与所述第一节点建立了回传链路RLC信道。
4、根据附记1-3中的任一项所述的装置,其中,
所述第一条件包括:AS安全已经激活且SRB2已经建立。
5、根据附记4所述的装置,其中,
所述第一条件还包括以下中的至少一个:
在所述第一节点配置了和/或使用双连接且所述无线链路失败是SCG无线链路失败的情况下,未发起或无法发起SCG失败信息过程;
在所述第一节点配置了和/或使用双连接且所述无线链路失败是MCG无线链路失败的情况下,未发起或无法发起MCG失败信息过程;以及
所述第一节点正在进行切换或移植。
6、根据附记5所述的装置,其中,所述未发起或无法发起SCG失败信息过程包括以下中的至少一个:
无法通过F1接口消息把SCG失败信息上报给所述第一节点的IAB宿主;
所述双连接是NR-DC;以及
MCG传输被挂起,或者,发起了MCG失败信息过程。
7、根据附记5所述的装置,其中,所述未发起或无法发起MCG失败信息过程包括以下中的至少一个:
无法通过F1接口消息把MCG失败信息上报给所述第一节点的IAB宿主;
未配置第一定时器;
SCG传输被挂起;以及
正在进行PSCell改变或PSCell增加。
8、根据附记5所述的装置,其中,所述第一节点正在进行切换或移植,包括:
在第二定时器正在运行的情况下,当使用两个协议栈分别与源父节点和目标父节点连接时,所述两个协议栈属于所述第一节点的一个MT逻辑实体。
9、根据附记5所述的装置,其中,所述第一节点正在进行切换或移植,包括:
在第二定时器正在运行的情况下,当使用两个协议栈分别与源父节点和目标父节点连接时,所述两个协议栈分别属于所述第一节点的两个MT逻辑实体。
10、根据附记8所述的装置,其中,
所述两个协议栈对应于回传链路RLC信道。
11、根据附记10所述的装置,其中,
使用所述两个协议栈分别与源父节点和目标父节点连接表示配置了任意一个双协议栈回传链路RLC信道。
12、根据附记11所述的装置,其中,
IE BH-RLC-ChannelConfig里的第一域用来指示所述第一节点与其父节点之间的一个BH RLC信道配置为双协议栈BH RLC信道。
13、根据附记8或9所述的装置,其中,
所述两个协议栈对应于RRC承载。
14、根据附记13所述的装置,其中,
使用所述两个协议栈分别与源父节点和目标父节点连接表示配置了任意一个双协议栈承载。
15、根据附记14所述的装置,其中,
IE DRB-ToAddMod里的第二域用来指示一个承载配置为双协议栈承载。
16、根据附记8或9所述的装置,其中,
当所述无线链路失败是源无线链路失败时,不触发回传链路无线链路失败通知的生成。
17、根据附记8或9所述的装置,其中,
当所述无线链路失败是源无线链路失败时,触发回传链路无线链路失败通知的生成。
17a、根据附记17所述的装置,其中,
当源PCell里未检测到无线链路失败,且MCG的第二定时器超时时,与源父节点连接的协议栈里触发type 3无线链路失败通知的生成。
17b、根据附记17所述的装置,其中,
当无线链路失败后成功恢复或者第一节点切换或移植成功完成时,与目标父节点连接的协议栈里触发type 3无线链路失败通知的生成。
18、根据附记17或17a或17b所述的装置,其中,
所述type 3无线链路失败通知指示回传链路从无线链路失败成功恢复,
所述type 3无线链路失败通知通过BAP控制PDU携带。
19、根据附记17或17a或17b或18所述的装置,其中,所述第一节点切换或移植成功完成,包括以下中的至少一个:
所述第一节点同步到目标小区;
所述第一节点在目标小区里成功完成随机接入;
所述第一节点发送了RRCReconfigurationComplete消息;
所述第一节点收到了一个L1或L2的显式指示,所述指示用于指示双协议栈操作的源小区部分将要被停止和/或双协议栈配置的源小区部分将要被释放;以及
所述第一节点与目标节点显式请求的一样,已经释放了源小区。
20、根据附记8或9所述的装置,其中,
当所述无线链路失败是目标无线链路失败时,
当检测到目标无线链路失败时,且当满足所述第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,
基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,或者,
当满足所述第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。
21、根据附记1-20中的任一项所述的装置,其中,所述第一触发单元包括:
第四触发单元,其当检测到无线链路失败且满足所述第一条件时,触发或生成或发送回传链路无线链路失败通知;或者,
第五触发单元,其当检测到无线链路失败时,并且,当第三定时器超时或未配置时,触发或生成或发送回传链路无线链路失败通知,或者,当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知;或者,
第六触发单元,其当检测到无线链路失败且满足所述第一条件时,并且,当第三定时器超时或未配置时,触发或生成或发送回传链路无线链路失败通知,或者,当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
22、根据附记1-20中的任一项所述的装置,其中,所述第二触发单元包括:
第七触发单元,其当第三定时器超时时,触发或生成或发送回传链路无线链路失败通知,或者,
第八触发单元,其当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
23、根据附记22所述的装置,其中,
当触发或生成或发送type 3回传链路无线链路失败通知时,或者,当检测到的无线链路失败被恢复时,停止所述第三定时器。
24、根据附记1-20中的任一项所述的装置,其中,所述第三触发单元包括:
第九触发单元,其当满足第一条件时,并且,当第三定时器超时时,触发或生成或发送回传链路无线链路失败通知,或者,
第十触发单元,其当满足第一条件时,并且,当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
25、根据附记24所述的装置,其中,
当触发或生成或发送type 3回传链路无线链路失败通知时,或者,当检测到的无 线链路失败被恢复时,停止所述第三定时器。
26、根据附记21-25中的任一项所述的装置,其中,
当触发或生成或发送了一个回传链路无线链路失败通知时,启动或重启所述第三定时器。
27、根据附记21-26中的任一项所述的装置,其中,
所述第一节点的RRC层或BAP层基于所述第三定时器的状态,触发或不触发生成回传链路无线链路失败通知。
28、根据附记21所述的装置,其中,
当满足以下条件中的至少一个时,停止所述第三定时器:
收到RRCSetup消息、RRCRelease消息以及reconfigurationWithSync消息中的至少一个;
发起RRC连接重建过程;
进入RRC空闲状态(going to RRC_IDLE);
reconfigurationWithSync消息包括在MAC或SCG的spCellConfig消息里,且NR小区组的MAC成功完成了RA过程;
第二小区组释放或MR-DC释放;以及
重新配置所述第三定时器。
29、根据附记21-28中的任一项所述的装置,其中,
每IAB节点或每IAB-MT或每小区组或每用例配置一个所述第三定时器。
30、根据附记21-29中的任一项所述的装置,其中,
所述第三定时器是禁止定时器或迟滞定时器。
31、根据附记1-30中的任一项所述的装置,其中,
所述回传链路无线链路失败通知是type 2或type 1无线链路失败通知。
32、根据附记31所述的装置,其中,
所述type 2无线链路失败通知用来指示所述第一节点检测到回传链路无线链路失败且所述第一节点正在尝试从所述回传链路无线链路失败恢复,
所述type 1无线链路失败通知用来指示所述第一节点检测到回传链路无线链路失败,
所述type 2或type 1无线链路失败通知通过BAP控制PDU携带。
33、根据附记7所述的装置,其中,
所述第一定时器是定时器T316。
34、根据附记8或9所述的装置,其中,
所述第二定时器是定时器T304。
35、一种触发生成回传链路无线链路失败通知的装置,所述装置应用于第一节点,所述装置包括:
第十一触发单元,其当满足第二条件时,触发生成回传链路无线链路失败通知,或者,
第十二触发单元,其当满足第二条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,
所述第二条件包括以下中的至少一个:
第一定时器超时;
第二定时器超时;
RRC连接重配置失败;以及
收到来自低层的完整性检查失败指示。
36、根据附记35所述的装置,其中,
仅当IAB节点或IAB-MT配置了分裂SRB1或SRB3时,网络配置所述第一定时器的值。
37、根据附记35所述的装置,其中,
当发送或传输MCGFailureInformation消息时,启动所述第一定时器。
38、根据附记35所述的装置,其中,
当收到RRCRelease消息、有PCell的reconfigurationwithSync的RRCReconfiguration消息或MobilityFromNRCommand消息时;或者,当发起RRC连接重建过程时,停止所述第一定时器。
39、根据附记35所述的装置,其中,所述第二定时器超时,包括:
在RRCReconfiguration消息不是从其他RAT收到的情况下,
MCG的第二定时器超时,且没有配置任何DAPS承载或双协议栈回传链路RLC信道;或者,源PCell里检测到无线链路失败;或者,
SCG的第二定时器超时,且使用NR-DC且MCG传输被挂起。
40、根据附记35所述的装置,其中,
当收到包括reconfigurationWithSync的RRCReconfiguration消息或条件重配置执行消息时,启动所述第二定时器。
41、根据附记35所述的装置,其中,
当成功完成在相应的特殊小区上的随机接入或SCG释放时,停止所述第二定时器。
42、根据附记35所述的装置,其中,
所述RRC连接重配置失败,包括:
在RRCReconfiguration通过NR收到且IAB节点或IAB-MT不是EN-DC的情况下,
IAB节点或IAB-MT使用NR SA、NE-DC或NR-DC,IAB节点或IAB-MT不能遵循包括在经SRB1接收的RRCReconfiguration消息里的部分配置或内嵌的SCG配置或部分MCG配置与部分SCG配置的组合或内嵌的V2X sidelink配置,或高层指示nas-Container无效;且已经激活了AS安全并已经建立了SRB2;和/或,
IAB节点或IAB-MT使用NR SA或NR-DC,IAB节点或IAB-MT不能遵循包括在经SRB3接收的RRCReconfiguration消息里的部分配置且MCG传输被挂起。
43、根据附记35所述的装置,其中,
所述来自低层的完整性检查失败指示,包括以下中的至少一个:
来自物理层的DCI或PDCCH完整性检查失败;
来自MAC子层的MAC CE完整性检查失败;
来自RLC子层的RLC控制PDU完整性检查失败;以及
来自BAP子层的BAP控制PDU完整性检查失败。
44、根据附记35所述的装置,其中,
所述第一节点作为一个IAB节点连接,或者,所述第一节点是IAB节点。
45、根据附记35所述的装置,其中,
所述第一定时器是定时器T316,和/或
所述第二定时器是定时器T304。
46、根据附记35所述的装置,其中,
所述回传链路无线链路失败通知是type 2无线链路失败通知。
47、根据附记35-46中任一项所述的装置,其中,
第十二触发单元当满足所述第二条件时,并且,当第四定时器超时或未配置时,触发或生成或发送回传链路无线链路失败通知,或者,当第四定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
48、根据附记46所述的装置,其中,
当触发或生成或发送了一个回传链路无线链路失败通知时,启动或重启所述第四定时器。
49、根据附记46-48中的任一项所述的装置,其中,
所述第一节点的RRC层或BAP层基于所述第四定时器的状态,触发或不触发生成回传链路无线链路失败通知。
50、根据附记46所述的装置,其中,
当满足以下条件中的至少一个时,停止所述第四定时器:
收到RRCSetup消息、RRCRelease消息以及reconfigurationWithSync消息中的至少一个;
发起RRC连接重建过程;
进入RRC空闲状态(going to RRC_IDLE);
reconfigurationWithSync消息包括在MAC或SCG的spCellConfig消息里,且NR小区组的MAC成功完成了RA过程;
第二小区组释放或MR-DC释放;以及
重新配置所述第四定时器。
51、根据附记46-50中的任一项所述的装置,其中,
每IAB节点或每IAB-MT或每小区组或每用例配置一个所述第四定时器。
52、根据附记46-51中的任一项所述的装置,其中,
所述第四定时器是禁止定时器或迟滞定时器。
53、一种网络设备,所述网络设备是第一节点,所述网络设备包括根据附记1-52中的任一项所述的装置。
54、一种通信系统,所述通信系统包括根据附记53所述的网络设备。
附记二
1、一种触发生成回传链路无线链路失败通知的方法,所述方法应用于第一节点,所述方法包括:
当检测到无线链路失败时,且当满足第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,
基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,
当满足第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。
2、根据附记1所述的方法,其中,
所述第一节点作为一个IAB节点连接,或者,所述第一节点是IAB节点。
3、根据附记2所述的方法,其中,所述第一节点作为一个IAB节点连接,或者,所述第一节点是IAB节点,包括以下中的至少一个:
在连接建立过程中,所述第一节点作为一个IAB节点接入网络;
在增加和/或更新辅节点过程中,所述第一节点作为一个IAB节点连接到辅节点;
所述第一节点作为一个IAB节点为子节点或终端设备服务;
至少有一个连接的IAB节点作为所述第一节点的子节点;以及
至少有一个连接的IAB节点已经与所述第一节点建立了回传链路RLC信道。
4、根据附记1-3中的任一项所述的方法,其中,
所述第一条件包括:AS安全已经激活且SRB2已经建立。
5、根据附记4所述的方法,其中,
所述第一条件还包括以下中的至少一个:
在所述第一节点配置了和/或使用双连接且所述无线链路失败是SCG无线链路失败的情况下,未发起或无法发起SCG失败信息过程;
在所述第一节点配置了和/或使用双连接且所述无线链路失败是MCG无线链路失败的情况下,未发起或无法发起MCG失败信息过程;以及
所述第一节点正在进行切换或移植。
6、根据附记5所述的方法,其中,所述未发起或无法发起SCG失败信息过程包括以下中的至少一个:
无法通过F1接口消息把SCG失败信息上报给所述第一节点的IAB宿主;
所述双连接是NR-DC;以及
MCG传输被挂起,或者,发起了MCG失败信息过程。
7、根据附记5所述的方法,其中,所述未发起或无法发起MCG失败信息过程包括以下中的至少一个:
无法通过F1接口消息把MCG失败信息上报给所述第一节点的IAB宿主;
未配置第一定时器;
SCG传输被挂起;以及
正在进行PSCell改变或PSCell增加。
8、根据附记5所述的方法,其中,所述第一节点正在进行切换或移植,包括:
在第二定时器正在运行的情况下,当使用两个协议栈分别与源父节点和目标父节点连接时,所述两个协议栈属于所述第一节点的一个MT逻辑实体。
9、根据附记5所述的方法,其中,所述第一节点正在进行切换或移植,包括:
在第二定时器正在运行的情况下,当使用两个协议栈分别与源父节点和目标父节点连接时,所述两个协议栈分别属于所述第一节点的两个MT逻辑实体。
10、根据附记8所述的方法,其中,
所述两个协议栈对应于回传链路RLC信道。
11、根据附记10所述的方法,其中,
使用所述两个协议栈分别与源父节点和目标父节点连接表示配置了任意一个双协议栈回传链路RLC信道。
12、根据附记11所述的方法,其中,
IE BH-RLC-ChannelConfig里的第一域用来指示所述第一节点与其父节点之间的一个BH RLC信道配置为双协议栈BH RLC信道。
13、根据附记8或9所述的方法,其中,
所述两个协议栈对应于RRC承载。
14、根据附记13所述的方法,其中,
使用所述两个协议栈分别与源父节点和目标父节点连接表示配置了任意一个双协议栈承载。
15、根据附记14所述的方法,其中,
IE DRB-ToAddMod里的第二域用来指示一个承载配置为双协议栈承载。
16、根据附记8或9所述的方法,其中,
当所述无线链路失败是源无线链路失败时,不触发回传链路无线链路失败通知的生成。
17、根据附记8或9所述的方法,其中,
当所述无线链路失败是源无线链路失败时,触发回传链路无线链路失败通知的生成。
17a、根据附记17所述的方法,其中,
当源PCell里未检测到无线链路失败,且MCG的第二定时器超时时,与源父节点连接的协议栈里触发type 3无线链路失败通知的生成。
17b、根据附记17所述的方法,其中,
当无线链路失败后成功恢复或者第一节点切换或移植成功完成时,与目标父节点连接的协议栈里触发type 3无线链路失败通知的生成。
18、根据附记17或17a或17b所述的方法,其中,
所述type 3无线链路失败通知指示回传链路从无线链路失败成功恢复,
所述type 3无线链路失败通知通过BAP控制PDU携带。
19、根据附记17或17a或17b或18所述的方法,其中,所述第一节点切换或移植成功完成,包括以下中的至少一个:
所述第一节点同步到目标小区;
所述第一节点在目标小区里成功完成随机接入;
所述第一节点发送了RRCReconfigurationComplete消息;
所述第一节点收到了一个L1或L2的显式指示,所述指示用于指示双协议栈操作的源小区部分将要被停止和/或双协议栈配置的源小区部分将要被释放;以及
所述第一节点与目标节点显式请求的一样,已经释放了源小区。
20、根据附记8或9所述的方法,其中,
当所述无线链路失败是目标无线链路失败时,
当检测到目标无线链路失败时,且当满足所述第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,
基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,或者,
当满足所述第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。
21、根据附记1-20中的任一项所述的方法,其中,当检测到无线链路失败时,且当满足第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,包括:
当检测到无线链路失败且满足所述第一条件时,触发或生成或发送回传链路无线链路失败通知;或者,
当检测到无线链路失败时,并且,当第三定时器超时或未配置时,触发或生成或发送回传链路无线链路失败通知,或者,当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知;或者,
当检测到无线链路失败且满足所述第一条件时,并且,当第三定时器超时或未配置时,触发或生成或发送回传链路无线链路失败通知,或者,当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
22、根据附记1-20中的任一项所述的方法,其中,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,包括:
当第三定时器超时时,触发或生成或发送回传链路无线链路失败通知,或者,
当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
23、根据附记22所述的方法,其中,
当触发或生成或发送type 3回传链路无线链路失败通知时,或者,当检测到的无线链路失败被恢复时,停止所述第三定时器。
24、根据附记1-20中的任一项所述的方法,其中,当满足第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,包括:
当满足第一条件时,并且,
当第三定时器超时时,触发或生成或发送回传链路无线链路失败通知,或者,
当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
25、根据附记24所述的方法,其中,
当触发或生成或发送type 3回传链路无线链路失败通知时,或者,当检测到的无线链路失败被恢复时,停止所述第三定时器。
26、根据附记21-25中的任一项所述的方法,其中,
当触发或生成或发送了一个回传链路无线链路失败通知时,启动或重启所述第三定时器。
27、根据附记21-26中的任一项所述的方法,其中,
所述第一节点的RRC层或BAP层基于所述第三定时器的状态,触发或不触发生成回传链路无线链路失败通知。
28、根据附记21所述的方法,其中,
当满足以下条件中的至少一个时,停止所述第三定时器:
收到RRCSetup消息、RRCRelease消息以及reconfigurationWithSync消息中的至少一个;
发起RRC连接重建过程;
进入RRC空闲状态(going to RRC_IDLE);
reconfigurationWithSync消息包括在MAC或SCG的spCellConfig消息里,且NR小区组的MAC成功完成了RA过程;
第二小区组释放或MR-DC释放;以及
重新配置所述第三定时器。
29、根据附记21-28中的任一项所述的方法,其中,
每IAB节点或每IAB-MT或每小区组或每用例配置一个所述第三定时器。
30、根据附记21-29中的任一项所述的方法,其中,
所述第三定时器是禁止定时器或迟滞定时器。
31、根据附记1-30中的任一项所述的方法,其中,
所述回传链路无线链路失败通知是type 2或type 1无线链路失败通知。
32、根据附记31所述的方法,其中,
所述type 2无线链路失败通知用来指示所述第一节点检测到回传链路无线链路失败且所述第一节点正在尝试从所述回传链路无线链路失败恢复,
所述type 1无线链路失败通知用来指示所述第一节点检测到回传链路无线链路失败,
所述type 2或type 1无线链路失败通知通过BAP控制PDU携带。
33、根据附记7所述的方法,其中,
所述第一定时器是定时器T316。
34、根据附记8或9所述的方法,其中,
所述第二定时器是定时器T304。
35、一种触发生成回传链路无线链路失败通知的方法,所述方法应用于第一节点,所述方法包括:
当满足第二条件时,触发生成回传链路无线链路失败通知,或者,
当满足第二条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,
所述第二条件包括以下中的至少一个:
第一定时器超时;
第二定时器超时;
RRC连接重配置失败;以及
收到来自低层的完整性检查失败指示。
36、根据附记35所述的方法,其中,
仅当IAB节点或IAB-MT配置了分裂SRB1或SRB3时,网络配置所述第一定时器的值。
37、根据附记35所述的方法,其中,
当发送或传输MCGFailureInformation消息时,启动所述第一定时器。
38、根据附记35所述的方法,其中,
当收到RRCRelease消息、有PCell的reconfigurationwithSync的RRCReconfiguration消息或MobilityFromNRCommand消息时;或者,当发起RRC连接重建过程时,停止所述第一定时器。
39、根据附记35所述的方法,其中,所述第二定时器超时,包括:
在RRCReconfiguration消息不是从其他RAT收到的情况下,
MCG的第二定时器超时,且没有配置任何DAPS承载或双协议栈回传链路RLC信道;或者,源PCell里检测到无线链路失败;或者,
SCG的第二定时器超时,且使用NR-DC且MCG传输被挂起。
40、根据附记35所述的方法,其中,
当收到包括reconfigurationWithSync的RRCReconfiguration消息或条件重配置执行消息时,启动所述第二定时器。
41、根据附记35所述的方法,其中,
当成功完成在相应的特殊小区上的随机接入或SCG释放时,停止所述第二定时器。
42、根据附记35所述的方法,其中,
所述RRC连接重配置失败,包括:
在RRCReconfiguration通过NR收到且IAB节点或IAB-MT不是EN-DC的情况下,
IAB节点或IAB-MT使用NR SA、NE-DC或NR-DC,IAB节点或IAB-MT不能遵循包括在经SRB1接收的RRCReconfiguration消息里的部分配置或内嵌的SCG配置或部分MCG配置与部分SCG配置的组合或内嵌的V2X sidelink配置,或高层指示nas-Container无效;且已经激活了AS安全并已经建立了SRB2;和/或,
IAB节点或IAB-MT使用NR SA或NR-DC,IAB节点或IAB-MT不能遵循包括在经SRB3接收的RRCReconfiguration消息里的部分配置且MCG传输被挂起。
43、根据附记35所述的方法,其中,
所述来自低层的完整性检查失败指示,包括以下中的至少一个:
来自物理层的DCI或PDCCH完整性检查失败;
来自MAC子层的MAC CE完整性检查失败;
来自RLC子层的RLC控制PDU完整性检查失败;以及
来自BAP子层的BAP控制PDU完整性检查失败。
44、根据附记35所述的方法,其中,
所述第一节点作为一个IAB节点连接,或者,所述第一节点是IAB节点。
45、根据附记35所述的方法,其中,
所述第一定时器是定时器T316,和/或
所述第二定时器是定时器T304。
46、根据附记35所述的方法,其中,
所述回传链路无线链路失败通知是type 2无线链路失败通知。
47、根据附记35-46中任一项所述的方法,其中,当满足第二条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知,包括:
当满足所述第二条件时,并且,当第四定时器超时或未配置时,触发或生成或发 送回传链路无线链路失败通知,或者,当第四定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
48、根据附记46所述的方法,其中,
当触发或生成或发送了一个回传链路无线链路失败通知时,启动或重启所述第四定时器。
49、根据附记46-48中的任一项所述的方法,其中,
所述第一节点的RRC层或BAP层基于所述第四定时器的状态,触发或不触发生成回传链路无线链路失败通知。
50、根据附记46所述的方法,其中,
当满足以下条件中的至少一个时,停止所述第四定时器:
收到RRCSetup消息、RRCRelease消息以及reconfigurationWithSync消息中的至少一个;
发起RRC连接重建过程;
进入RRC空闲状态(going to RRC_IDLE);
reconfigurationWithSync消息包括在MAC或SCG的spCellConfig消息里,且NR小区组的MAC成功完成了RA过程;
第二小区组释放或MR-DC释放;以及
重新配置所述第四定时器。
51、根据附记46-50中的任一项所述的方法,其中,
每IAB节点或每IAB-MT或每小区组或每用例配置一个所述第四定时器。
52、根据附记46-51中的任一项所述的方法,其中,
所述第四定时器是禁止定时器或迟滞定时器。

Claims (20)

  1. 一种触发生成回传链路无线链路失败通知的装置,所述装置应用于第一节点,所述装置包括:
    第一触发单元,其当检测到无线链路失败时,且当满足第一条件时和/或基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,
    第二触发单元,其基于定时器的状态,触发或不触发生成回传链路无线链路失败通知;或者,
    第三触发单元,其当满足第一条件时,基于定时器的状态,触发或不触发生成回传链路无线链路失败通知。
  2. 根据权利要求1所述的装置,其中,
    所述第一节点作为一个IAB节点连接,或者,所述第一节点是IAB节点。
  3. 根据权利要求2所述的装置,其中,所述第一节点作为一个IAB节点连接,或者,所述第一节点是IAB节点,包括以下中的至少一个:
    在连接建立过程中,所述第一节点作为一个IAB节点接入网络;
    在增加和/或更新辅节点过程中,所述第一节点作为一个IAB节点连接到辅节点;
    所述第一节点作为一个IAB节点为子节点或终端设备服务;
    至少有一个连接的IAB节点作为所述第一节点的子节点;以及
    至少有一个连接的IAB节点已经与所述第一节点建立了回传链路RLC信道。
  4. 根据权利要求1所述的装置,其中,
    所述第一条件包括:AS安全已经激活且SRB2已经建立。
  5. 根据权利要求4所述的装置,其中,
    所述第一条件还包括以下中的至少一个:
    在所述第一节点配置了和/或使用双连接且所述无线链路失败是SCG无线链路失败的情况下,未发起或无法发起SCG失败信息过程;
    在所述第一节点配置了和/或使用双连接且所述无线链路失败是MCG无线链路失败的情况下,未发起或无法发起MCG失败信息过程;以及
    所述第一节点正在进行切换或移植。
  6. 根据权利要求5所述的装置,其中,所述未发起或无法发起SCG失败信息过程包括以下中的至少一个:
    无法通过F1接口消息把SCG失败信息上报给所述第一节点的IAB宿主;
    所述双连接是NR-DC;以及
    MCG传输被挂起,或者,发起了MCG失败信息过程。
  7. 根据权利要求5所述的装置,其中,所述未发起或无法发起MCG失败信息过程包括以下中的至少一个:
    无法通过F1接口消息把MCG失败信息上报给所述第一节点的IAB宿主;
    未配置第一定时器;
    SCG传输被挂起;以及
    正在进行PSCell改变或PSCell增加。
  8. 根据权利要求5所述的装置,其中,所述第一节点正在进行切换或移植,包括:
    在第二定时器正在运行的情况下,当使用两个协议栈分别与源父节点和目标父节点连接时,所述两个协议栈属于所述第一节点的一个MT逻辑实体。
  9. 根据权利要求5所述的装置,其中,所述第一节点正在进行切换或移植,包括:
    在第二定时器正在运行的情况下,当使用两个协议栈分别与源父节点和目标父节点连接时,所述两个协议栈分别属于所述第一节点的两个MT逻辑实体。
  10. 根据权利要求8所述的装置,其中,
    使用所述两个协议栈分别与源父节点和目标父节点连接表示配置了任意一个双协议栈回传链路RLC信道。
  11. 根据权利要求1所述的装置,其中,所述第一触发单元包括:
    第四触发单元,其当检测到无线链路失败且满足所述第一条件时,触发或生成或发送回传链路无线链路失败通知;或者,
    第五触发单元,其当检测到无线链路失败时,并且,当第三定时器超时或未配置时,触发或生成或发送回传链路无线链路失败通知,或者,当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知;或者,
    第六触发单元,其当检测到无线链路失败且满足所述第一条件时,并且,当第三 定时器超时或未配置时,触发或生成或发送回传链路无线链路失败通知,或者,当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
  12. 根据权利要求1所述的装置,其中,所述第二触发单元包括:
    第七触发单元,其当第三定时器超时时,触发或生成或发送回传链路无线链路失败通知,或者,
    第八触发单元,其当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
  13. 根据权利要求12所述的装置,其中,
    当触发或生成或发送type 3回传链路无线链路失败通知时,或者,当检测到的无线链路失败被恢复时,停止所述第三定时器。
  14. 根据权利要求1所述的装置,其中,所述第三触发单元包括:
    第九触发单元,其当满足第一条件时,并且,当第三定时器超时时,触发或生成或发送回传链路无线链路失败通知,或者,
    第十触发单元,其当满足第一条件时,并且,当第三定时器运行时或停止时,不会触发或生成或发送回传链路无线链路失败通知。
  15. 根据权利要求14所述的装置,其中,
    当触发或生成或发送type 3回传链路无线链路失败通知时,或者,当检测到的无线链路失败被恢复时,停止所述第三定时器。
  16. 根据权利要求11所述的装置,其中,
    当触发或生成或发送了一个回传链路无线链路失败通知时,启动或重启所述第三定时器。
  17. 根据权利要求11所述的装置,其中,
    所述第一节点的RRC层或BAP层基于所述第三定时器的状态,触发或不触发生成回传链路无线链路失败通知。
  18. 根据权利要求11所述的装置,其中,
    所述第三定时器是禁止定时器或迟滞定时器。
  19. 根据权利要求1所述的装置,其中,
    所述回传链路无线链路失败通知是type 2或type 1无线链路失败通知。
  20. 根据权利要求19所述的装置,其中,
    所述type 2无线链路失败通知用来指示所述第一节点检测到回传链路无线链路失败且所述第一节点正在尝试从所述回传链路无线链路失败恢复,
    所述type 1无线链路失败通知用来指示所述第一节点检测到回传链路无线链路失败,
    所述type 2或type 1无线链路失败通知通过BAP控制PDU携带。
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