WO2024138458A1 - 连接建立方法及装置 - Google Patents
连接建立方法及装置 Download PDFInfo
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- WO2024138458A1 WO2024138458A1 PCT/CN2022/143014 CN2022143014W WO2024138458A1 WO 2024138458 A1 WO2024138458 A1 WO 2024138458A1 CN 2022143014 W CN2022143014 W CN 2022143014W WO 2024138458 A1 WO2024138458 A1 WO 2024138458A1
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- node
- iab
- network layer
- configuration information
- layer configuration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0009—Control or signalling for completing the hand-off for a plurality of users or terminals, e.g. group communication or moving wireless networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
- H04W36/087—Reselecting an access point between radio units of access points
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
Definitions
- connection establishment method and device thereof which can be applied to a 5G system and is suitable for supporting scenarios of integrated access and backhaul IAB. It can support a second DU of a first node to establish a connection with a third node through a transmission path under a host node connected to the MT, and the third node is different from the host node connected to the first DU.
- the migration of the MT and the DU can be separated, and F1 connection establishment in various scenarios is supported.
- the second DU of the first node it is possible to support the second DU of the first node to establish a connection with a third node through a transmission path under a host node connected to the MT, and the third node is different from the host node connected to the first DU, and the migration of the MT and the DU can be separated, supporting the establishment of F1 connections in various scenarios.
- an embodiment of the present disclosure provides a communication device, which has the function of implementing some or all of the functions of the first node in the method described in the first aspect above, such as the function of the communication device may have the functions of some or all of the embodiments in the present disclosure, or may have the function of implementing any one of the embodiments in the present disclosure alone.
- the functions may be implemented by hardware, or may be implemented by hardware executing corresponding software.
- the hardware or software includes one or more units or modules corresponding to the above functions.
- the communication device includes: a transceiver module configured to receive transmission network layer configuration information, wherein the first node includes an MT, a first DU and a second DU, and the transmission network layer configuration information is used to indicate that the second DU establishes a connection with a third node through a transmission path under a host node connected to the MT, and the third node is different from the host node connected to the first DU.
- a transceiver module configured to receive transmission network layer configuration information, wherein the first node includes an MT, a first DU and a second DU, and the transmission network layer configuration information is used to indicate that the second DU establishes a connection with a third node through a transmission path under a host node connected to the MT, and the third node is different from the host node connected to the first DU.
- an embodiment of the present disclosure provides another communication device, which has some or all of the functions of the second node in the method example described in the second aspect above, such as the functions of the communication device may have the functions of some or all of the embodiments in the present disclosure, or may have the functions of implementing any one of the embodiments in the present disclosure alone.
- the functions may be implemented by hardware, or may be implemented by hardware executing corresponding software.
- the hardware or software includes one or more units or modules corresponding to the above functions.
- the structure of the communication device may include a transceiver module and a processing module, and the processing module is configured to support the communication device to perform the corresponding functions in the above method.
- the transceiver module is used to support communication between the communication device and other devices.
- the communication device may also include a storage module, which is coupled to the transceiver module and the processing module, and stores computer programs and data necessary for the communication device.
- an embodiment of the present disclosure provides another communication device, which has some or all of the functions of the third node in the method example described in the third aspect above, such as the functions of the communication device may have the functions of some or all of the embodiments in the present disclosure, or may have the functions of implementing any one of the embodiments in the present disclosure alone.
- the functions may be implemented by hardware, or by hardware executing corresponding software implementations.
- the hardware or software includes one or more units or modules corresponding to the above functions.
- the communication device includes: a transceiver module, configured to send first indication information to a second node, wherein the first indication information is used to instruct the second node to send transmission network layer configuration information to the first node, the first node includes an MT, a first DU and a second DU, and the transmission network layer configuration information is used to instruct the second DU to establish a connection with a third node through a transmission path under a host node connected to the MT, the third node is different from the host node connected to the first DU, and the second node is a host node connected to the MT and/or the first DU.
- a transceiver module configured to send first indication information to a second node, wherein the first indication information is used to instruct the second node to send transmission network layer configuration information to the first node, the first node includes an MT, a first DU and a second DU, and the transmission network layer configuration information is used to instruct the second DU to establish a connection with a third no
- an embodiment of the present disclosure provides a communication device, which includes a processor.
- the processor calls a computer program in a memory, the method described in the first aspect is executed.
- an embodiment of the present disclosure provides a communication device, which includes a processor.
- the processor calls a computer program in a memory, the method described in the third aspect is executed.
- an embodiment of the present disclosure provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the first aspect above.
- an embodiment of the present disclosure provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the second aspect above.
- an embodiment of the present disclosure provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in the second aspect above.
- an embodiment of the present disclosure provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in the third aspect above.
- an embodiment of the present disclosure provides a readable storage medium for storing instructions for the second node mentioned above, and when the instructions are executed, the second node executes the method described in the second aspect mentioned above.
- an embodiment of the present disclosure provides a readable storage medium for storing instructions used by the above-mentioned third node.
- the third node executes the method described in the above-mentioned third aspect.
- the present disclosure further provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in the first aspect above.
- the present disclosure further provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in the second aspect above.
- the present disclosure further provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in the third aspect above.
- the present disclosure provides a computer program which, when executed on a computer, enables the computer to execute the method described in the first aspect.
- the present disclosure provides a computer program which, when executed on a computer, enables the computer to execute the method described in the second aspect.
- the present disclosure provides a computer program which, when executed on a computer, enables the computer to execute the method described in the third aspect above.
- FIG1 is an architecture diagram of a communication system provided by an embodiment of the present disclosure.
- FIG3 is a schematic diagram of a backhaul link and an access link provided by an embodiment of the present disclosure
- FIG4 is an architecture diagram of an exemplary communication system applicable to an embodiment of the present disclosure.
- FIG5 is an architecture diagram of an exemplary communication system applicable to an embodiment of the present disclosure
- FIG6 is an architecture diagram of an exemplary communication system applicable to an embodiment of the present disclosure.
- FIG8 is a schematic diagram of another integrated access and backhaul IAB architecture provided by an embodiment of the present disclosure.
- FIG9 is a schematic diagram of an IAB-MT migration provided by an embodiment of the present disclosure.
- FIG10 is a schematic diagram of an IAB-DU migration provided by an embodiment of the present disclosure.
- FIG11 is a flow chart of a partial migration method provided by an embodiment of the present disclosure.
- FIG12 is a flow chart of a connection establishment method provided in an embodiment of the present disclosure.
- FIG13a is a schematic diagram of the migration separation of IAB-DU and IAB-MT provided by an embodiment of the present disclosure
- FIG14 is a flow chart of another connection establishment method provided in an embodiment of the present disclosure.
- FIG16 is a flow chart of another connection establishment method provided in an embodiment of the present disclosure.
- FIG18 is a flow chart of another connection establishment method provided in an embodiment of the present disclosure.
- FIG19 is a flow chart of another connection establishment method provided in an embodiment of the present disclosure.
- FIG20 is a flow chart of another connection establishment method provided in an embodiment of the present disclosure.
- FIG21 is a flow chart of another connection establishment method provided in an embodiment of the present disclosure.
- FIG22 is a flow chart of another connection establishment method provided in an embodiment of the present disclosure.
- FIG23 is a schematic diagram of the structure of a communication device provided in an embodiment of the present disclosure.
- FIG24 is a schematic diagram of the structure of another communication device provided in an embodiment of the present disclosure.
- FIG. 25 is a schematic diagram of the structure of a chip provided in an embodiment of the present disclosure.
- UE User equipment
- the user equipment involved in the present disclosure may be a terminal device or a terminal, or a hardware component inside the terminal device that can implement the functions of the terminal device.
- the user equipment may be referred to as a terminal device, a mobile station (MS), a mobile terminal (MT), etc., and may include, for example, a handheld device with a wireless connection function, or a processing device connected to a wireless modem.
- the terminal may communicate with a core network via a radio access network (RAN) and exchange voice and/or data with the RAN.
- RAN radio access network
- Some examples of terminal equipment are: personal communication service (PCS) telephone, cordless telephone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), barcode, radio frequency identification (RFID), sensor, satellite navigation system, such as global positioning system (GPS), Beidou positioning system, laser scanner and other information sensing devices and other devices.
- PCS personal communication service
- SIP session initiation protocol
- WLL wireless local loop
- PDA personal digital assistant
- RFID radio frequency identification
- sensor satellite navigation system, such as global positioning system (GPS), Beidou positioning system, laser scanner and other information
- Wearable devices can also be wearable devices. Wearable devices can also be called wearable smart devices. They are a general term for wearable devices that use wearable technology to intelligently design and develop wearable devices for daily wear, such as glasses, gloves, watches, clothing and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction.
- wearable smart devices include full-featured, large-sized, and independent of smartphones to achieve complete or partial functions, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets, smart helmets, and smart jewelry for vital sign monitoring.
- the terminal can also be a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a terminal device in a future evolved public land mobile network (PLMN), or a vehicle device in vehicle to everything (V2X), customer premises equipment (CPE), etc.
- VR virtual reality
- AR augmented reality
- PLMN future evolved public land mobile network
- V2X vehicle device in vehicle to everything
- CPE customer premises equipment
- Donor node also known as donor base station, refers to a node that can access the core network through this node. It is a device in the communication system that connects user equipment to the wireless network.
- the donor node is generally connected to the core network through a wired link (such as an optical fiber cable).
- the donor node can be responsible for receiving data from the core network and forwarding it to the wireless backhaul device, or receiving data from the wireless backhaul device and forwarding it to the core network.
- the donor node can generally be connected to the network through a wired connection.
- the donor node may include a centralized unit (CU) (abbreviated as Donor-CU or gNB-CU in this disclosure) and a distributed unit (DU) (abbreviated as Donor-DU or gNB-DU in this disclosure).
- the gNB-CU and the gNB-DU are connected through an F1 interface, and the F1 interface may further include a control plane interface (F1-C) and a user plane interface (F1-U).
- the CU and the core network are connected through a next generation (NG) interface.
- FIG1 shows an IAB system, where an IAB node provides wireless access and wireless backhaul of access services for user equipment.
- An IAB donor node IAB host node
- the IAB node is connected to the IAB donor node via a wireless backhaul link, thereby connecting the user equipment side device served by the IAB node to the core network.
- an F1 interface needs to be established between the DU of the IAB node and the CU of the IAB host, and the configuration of routing and bearer mapping is completed, so as to perform data transmission between the IAB node and the target IAB host according to the configuration.
- the F1 interface can also be called an F1* interface, and this embodiment does not limit the name of the interface.
- the interface is called an F1 interface as an example.
- the information indicated by the information is called the information to be indicated.
- the information to be indicated there are many ways to indicate the information to be indicated, such as but not limited to, directly indicating the information to be indicated, such as the information to be indicated itself or the index of the information to be indicated.
- the information to be indicated can also be indirectly indicated by indicating other information, wherein there is an association between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance.
- the indication of specific information can also be achieved by means of the arrangement order of each information agreed in advance (such as specified by the protocol), thereby reducing the indication overhead to a certain extent.
- the first, second and various digital numbers are only used for the convenience of description and are not used to limit the scope of the embodiments of the present disclosure. For example, to distinguish different information.
- the mobile IAB research work focuses on scenarios where vehicle-mounted mobile IAB nodes provide 5G coverage or capability enhancement for vehicle-mounted and/or surrounding terminals.
- the IAB-DU needs to establish a connection with IAB-donor1 through the transmission path under IAB-donor2.
- the switch is from a logical cell of IAB-DU1 to a logical cell of IAB-DU2, and there will be no connection interruption. In this way, the legacy switching process can be reused and the service interruption time can be reduced, as shown in Figure 11.
- DU2 establishes a connection with a target host node different from host node 1 connected to DU1 through a transmission path under host node 2 connected to MT, which is a problem that needs to be solved urgently.
- the “transmission path under the host node” may also be understood as the “transmission path in the host node topology” or the “transmission path passing through the sub-nodes in the host node topology”.
- the first node receives transmission network layer configuration information, which is used to instruct the second DU to establish a connection with a third node through a transmission path under the host node connected to the MT, and the third node is different from the host node connected to the first DU.
- the first node may be an IAB node, and the IAB node may also be a mobile IAB node, i.e., an mIAB node.
- the first node may include one or more logical sub-nodes, which may include MT (or IAB-MT) and DU (or IAB-DU).
- MT or IAB-MT
- DU or IAB-DU
- the first node may include one or more DUs, for example, a first DU and a second DU.
- the second DU establishes a connection with the third node through the transmission path under the host node connected to the MT.
- the second DU can establish a connection with the third node through the transmission path in the host node topology connected to the MT, or the transmission path for the second DU to establish a connection with the third node passes through a sub-node in the host node connected to the MT.
- the second DU establishes a connection with a third node through a transmission path under the host node to which the MT is connected, and the third node is different from the host node to which the MT is connected.
- the first node receives the transmission network layer configuration information sent by the second node, wherein the second node is a host node to which the MT and/or the first DU is connected.
- the first node may receive the transmission network layer configuration information sent by the second node, where the second node is a host node to which the MT and/or the first DU is connected.
- the first node receives transmission network layer configuration information sent by a host node to which the MT is connected.
- the first node receives transmission network layer configuration information sent by a host node to which the first DU is connected.
- the first node receives transmission network layer configuration information sent by a host node to which the MT and the first DU are connected.
- the MT and the first DU can be connected to the same host node, or the MT and the first DU can be connected to different host nodes respectively.
- the second node when the MT and the first DU are connected to the same host node, the second node may be the host node to which the MT and the first DU are connected.
- the first node may receive the transmission network layer configuration information sent by the second node to which the MT and the first DU are connected.
- the second node can be the host node connected to the MT, for example, the second node is the source host node of the MT of the first node, or the destination host node of the MT of the first node.
- the second node may also be the host node connected to the first DU.
- the first node may receive the transport network layer configuration information sent by the second node connected to the MT, or the first node may receive the transport network layer configuration information sent by the second node connected to the first DU.
- the first node receives the transmission network layer configuration information sent by the second node, including: receiving an RRC reconfiguration message sent by the second node, wherein the RRC reconfiguration message includes the transmission network layer configuration information; or receiving an F1AP message sent by the second node; wherein the F1AP message includes the transmission network layer configuration information.
- a first node may receive a radio resource control (RRC) reconfiguration message sent by a second node, wherein the RRC reconfiguration message includes transmission network layer configuration information.
- RRC radio resource control
- the first node can receive an F1 application protocol (F1 application protocol, F1AP) sent by the second node, wherein the F1AP message includes transmission network layer configuration information.
- F1 application protocol F1 application protocol, F1AP
- the first node receives the RRC reconfiguration message sent by the second node, including: receiving the RRC reconfiguration message sent by the second node during the process of MT switching connection to the second node; or receiving the RRC reconfiguration message sent by the second node after the MT switches connection to the second node.
- the transmission network layer configuration information includes at least one of the following:
- the transmission network layer configuration information includes at least one of the following:
- BAP address information is used to indicate a BAP address of the second DU in the host node topology to which the MT is connected;
- BAP routing identifier configuration information where the BAP routing identifier configuration information is used to indicate the default BAP routing identifier configuration of the second DU in the host node topology connected to the MT;
- Transmission network layer TNL address information where the TNL address information is used to indicate the TNL address of the second DU in the host node topology to which the MT is connected;
- Usage indication information where the usage indication information is used to indicate that the transport network layer configuration is used for the second DU.
- the BAP address information is used to indicate a BAP address of a boundary node in a host node topology to which the second DU is connected to the MT;
- the BAP routing identifier configuration information is used to configure a default BAP routing identifier for the second DU to be upstream in the host node topology connected to the MT;
- the transmission network layer configuration information includes BAP routing identifier configuration information, and the BAP routing identifier configuration information is used to indicate the default BAP routing identifier configuration of the second DU in the host node topology connected to the MT.
- the usage indication information may be a second DU identifier, which is used to indicate that the transmission network layer configuration is used for the second DU.
- FIG. 13 is a flowchart of another connection establishment method provided by an embodiment of the present disclosure.
- the connection establishment method of the embodiment of the present disclosure can be executed by a first node.
- the first node can be an IAB node (IAB-node).
- IAB-node IAB node
- the method can include but is not limited to the following steps:
- S131 Receive transmission network layer configuration information, wherein the first node includes an MT, a first DU, and a second DU, and the transmission network layer configuration information is used to indicate that the second DU establishes a connection with a third node through a transmission path under a host node connected to the MT, and the third node is different from the host node connected to the first DU.
- the second node may send an establishment request to establish a connection with the third node through a transmission path under the host node of the MT connection.
- the first node receives the transmission network layer configuration information, and according to the transmission network layer configuration information, a connection with the third node can be established, and the IAB-DU can be migrated to an IAB-donor-CU that is different from the IAB-donor-CU of the IAB-MT.
- the BH RLC channel information is used to configure a default BH RLC channel for uplink F1-C/non-F1 traffic mapping of the second DU on a target path in a host node topology connected to the MT;
- the transmission network layer configuration information includes BAP routing identifier configuration information, and the BAP routing identifier configuration information is used to indicate the default BAP routing identifier configuration of the second DU in the host node topology connected to the MT.
- the transport network layer configuration information includes transport network layer (TNL) address information, and the TNL address information is used to indicate the TNL address of the second DU in the host node topology to which the MT is connected.
- TNL transport network layer
- FIG. 15 is a flowchart of another connection establishment method provided by an embodiment of the present disclosure.
- the connection establishment method of the embodiment of the present disclosure can be executed by a second node.
- the second node can be the host node of the MT of the first node and/or the first DU connection.
- the method can include but is not limited to the following steps:
- the second node may be the host node connected to the MT of the first node and/or the first DU, and the second node may receive the first indication information sent by the third node, and the first indication information is used to instruct the second node to send transmission network layer configuration information to the first node.
- the third node may be a node for configuring the transmission network layer to establish a connection with the second DU through a transmission path under the host node to which the MT is connected.
- the second node receives the first indication information sent by the third node, wherein the first indication information is used to instruct the second node to obtain the transmission network layer configuration information, and send the transmission network layer configuration information to the first node, and send the transmission network layer configuration information to the first node, wherein the first node includes MT, the first DU and the second DU, and the transmission network layer configuration information is used to instruct the second DU to establish a connection with the third node through the transmission path under the host node connected to the MT, the third node is different from the host node connected to the first DU, and the second node is the host node connected to the MT and/or the first DU.
- connection establishment method of the embodiment of the present disclosure can be executed by a second node.
- the second node can be the host node of the MT of the first node.
- the method can include but is not limited to the following steps:
- S161 In response to the MT being connected to the second node and the first DU not being connected to the second node, receiving first indication information sent by a host node to which the first DU is connected, wherein the first indication information is used to instruct the second node to send transmission network layer configuration information to the first node.
- the second node may receive first indication information sent by the host node to which the first DU is connected, wherein the first indication information is used to instruct the second node to send transmission network layer configuration information to the first node.
- the first indication information includes at least one of the following:
- the identifier of the MT of the first node on the second node is the identifier of the MT of the first node on the second node.
- the indication for configuring the transport network layer configuration information for the first section may be an optional IE (information element), such as request of TNL configuration for IAB-DU2, where the IE is an enumeration type and a value of "True" indicates that the transport network layer configuration needs to be requested for IAB-DU2.
- an optional IE information element
- the second node when the second node is not the host node of the first DU, after receiving the first indication information sent by the host node connected to the first DU, it can obtain the transmission network layer configuration information, and send the transmission network layer configuration information to the first node according to the first indication information, and execute S162.
- S162 can refer to the relevant description in the above embodiment, and will not be repeated here.
- the second node in response to the MT being connected to the second node and the first DU not being connected to the second node, the second node receives the first indication information sent by the host node to which the first DU is connected, wherein the first indication information is used to instruct the second node to send the transmission network layer configuration information to the first node, and to send the transmission network layer configuration information to the first node, wherein the first node includes the MT, the first DU and the second DU, and the transmission network layer configuration information is used to instruct the second DU to establish a connection with the third node through the transmission path under the host node to which the MT is connected, the third node is different from the host node to which the first DU is connected, and the second node is the host node to which the MT is connected.
- the second DU of the first node can establish a connection with the third node through the transmission path under the host node to which the MT is connected according to the transmission network layer configuration information, and the third node is different from the host node to which the first DU is connected. It is possible to support the second DU of the first node to establish a connection with the third node through the transmission path under the host node to which the MT is connected, and the third node is different from the host node to which the first DU is connected, and the migration of the MT and the DU can be separated, supporting the establishment of F1 connections in various scenarios.
- connection establishment method of the embodiment of the present disclosure can be executed by a second node.
- the second node can be a host node of the first DU of the first node.
- the method can include but is not limited to the following steps:
- S171 In response to the first DU being connected to the second node and the MT not being connected to the second node, receiving first indication information sent by the host node to which the MT is connected; wherein the first indication information is used to instruct the second node to send transmission network layer configuration information to the first node.
- the second node may be a host node of the first DU of the first node, the first DU of the first node is connected to the second node, and the MT is not connected to the second node, that is, the host node of the MT is different from the second node.
- the second node may receive first indication information sent by the host node to which the MT is connected, wherein the first indication information is used to instruct the second node to obtain transmission network layer configuration information and send the transmission network layer configuration information to the first node.
- the first indication information includes at least one of the following:
- the first indication information includes an indication for configuring transmission network layer configuration information for the first node.
- the indication for configuring the transport network layer configuration information for the first section may be an optional IE (information element), such as request of TNL configuration for IAB-DU2, where the IE is an enumeration type and a value of "True" indicates that the transport network layer configuration needs to be requested for IAB-DU2.
- an optional IE information element
- the first indication information includes an identifier of the MT of the first node on the second node.
- the second node when the second node is not the host node of the MT, after receiving the first indication information sent by the host node to which the MT is connected, the second node can obtain the transmission network layer configuration information, and send the transmission network layer configuration information to the first node according to the first indication information, and execute S172.
- the second node in response to the first DU being connected to the second node and the MT not being connected to the second node, the second node receives the first indication information sent by the host node to which the MT is connected; wherein the first indication information is used to instruct the second node to send the transmission network layer configuration information to the first node, and to send the transmission network layer configuration information to the first node, wherein the first node includes the MT, the first DU and the second DU, and the transmission network layer configuration information is used to instruct the second DU to establish a connection with the third node through the transmission path under the host node to which the MT is connected, the third node is different from the host node to which the first DU is connected, and the second node is the host node to which the first DU is connected.
- the second DU of the first node can establish a connection with the third node through the transmission path under the host node to which the MT is connected according to the transmission network layer configuration information, and the third node is different from the host node to which the first DU is connected. It is possible to support the second DU of the first node to establish a connection with the third node through the transmission path under the host node to which the MT is connected, and the third node is different from the host node to which the first DU is connected, and the migration of the MT and the DU can be separated, supporting the establishment of F1 connections in various scenarios.
- S181 Sending first indication information to the second node, wherein the first indication information is used to instruct the second node to send transmission network layer configuration information to the first node, the first node includes MT, a first DU and a second DU, the transmission network layer configuration information is used to instruct the second DU to establish a connection with a third node through a transmission path under a host node connected to the MT, the third node is different from the host node connected to the first DU, and the second node is a host node connected to the MT and/or the first DU.
- the third node may send first indication information to the second node, wherein the second node is a host node connected to the MT and/or the first DU.
- the first indication information is used to instruct the second node to send transmission network layer configuration information to the first node, the first node includes the MT, the first DU and the second DU, and the transmission network layer configuration information is used to instruct the second DU to establish a connection with the third node through a transmission path under the host node connected to the MT, and the third node is different from the host node connected to the first DU.
- a transmission path under a host node may also be understood as “a transmission path in a host node topology” or “a transmission path passing through a sub-node in a host node topology”.
- the second DU establishes a connection with the third node through the transmission path under the host node connected to the MT.
- the second DU can establish a connection with the third node through the transmission path in the host node topology connected to the MT, or the transmission path for the second DU to establish a connection with the third node passes through a sub-node in the host node connected to the MT.
- the identifier of the MT of the first node on the second node is the identifier of the MT of the first node on the second node.
- a third node sends a first indication message to a second node, and the first indication message is used to instruct the second node to send transmission network layer configuration information to the first node.
- the second node can obtain the transmission network layer configuration information and send the transmission network layer configuration information to the first node.
- It can support the second DU of the first node to establish a connection with the third node through the transmission path under the host node connected by MT, and the third node is different from the host node connected by the first DU.
- the migration of MT and DU can be separated, and F1 connection establishment in various scenarios is supported.
- the transmission network layer configuration information includes at least one of the following:
- the transmission network layer configuration information includes at least one of the following:
- BAP address information is used to indicate a BAP address of the second DU in the host node topology to which the MT is connected;
- Wireless backhaul radio link control BH RLC channel information where the BH RLC channel information is used to indicate the default BH RLC channel of the second DU in the host node topology connected to the MT;
- the second DU of the first node can establish a connection with the third node through the transmission path under the host node connected to the MT according to the transmission network layer configuration information, and the third node is different from the host node connected to the first DU. It is possible to support the second DU of the first node to establish a connection with the third node through the transmission path under the host node connected to the MT, and the third node is different from the host node connected to the first DU.
- the migration of the MT and the DU can be separated, and the establishment of F1 connections in various scenarios is supported.
- the identifier of the MT of the first node on the second node is the identifier of the MT of the first node on the second node.
- the third node receives the second indication information sent by the host node connected to the first DU, wherein the second indication information is used to instruct the third node to send the first indication information to the second node, and send the first indication information to the second node, wherein the first indication information is used to instruct the second node to send the transmission network layer configuration information to the first node, the first node includes MT, the first DU and the second DU, the transmission network layer configuration information is used to instruct the second DU to establish a connection with the third node through the transmission path under the host node connected to the MT, the third node is different from the host node connected to the first DU, and the second node is the host node connected to the MT and/or the first DU.
- IAB-MT s IAB-donor-CU’s Global NG-RAN node ID
- the transport network layer configuration information includes a BH RLC configuration and a BAP configuration for the first logical connection.
- the first logical connection refers to the F1-C connection between IAB-DU2 and IAB-DU’s IAB-donor-CU.
- the IAB-MT’s IAB-donor-CU can be the IAB-MT’s target IAB-donor-CU.
- Step 106-Step 107 after IAB-DU2 on the IAB-node obtains the transport network layer configuration, it sends a feedback message to IAB-MT’s target IAB-donor-CU through IAB-MT’s target IAB-donor-DU to indicate that the RRC reconfiguration is completed.
- Step 108 IAB-MT’s target IAB-donor-CU sends a feedback message to IAB-DU’s target IAB-donor-CU, and the feedback message is used to feedback step 102.
- Step 110 IAB-DU’s source IAB-donor-CU notifies IAB-node to initiate F1 connection establishment between IAB-DU2 and IAB-DU’s target IAB-donor-CU.
- step 111 the IAB-node sends an F1 Setup Request (F1Setup Request, or F1 Setup) message to the IAB-DU’s target IAB-donor-CU according to the transport network layer configuration obtained in step 105.
- F1Setup Request F1Setup Request, or F1 Setup
- Step 112 IAB-DU’s target IAB-donor-CU sends an F1 setup response (F1Setup Response, or F1 setup feedback) message to IAB-DU2 on the IAB-node.
- F1 setup response F1Setup Response, or F1 setup feedback
- the mAB-node obtains the transmission network layer configuration for establishing the F1 connection, and supports the F1 connection establishment process in various scenarios.
- connection establishment method is provided in an embodiment of the present disclosure.
- the following steps omit the content that is not related to this solution: the embodiment of the present disclosure takes IAB-node as the first node, IAB-DU’s Target IAB-donor-CU as the third node, IAB-MT’s target IAB-donor-CU and/or IAB-DU’s source IAB-donor-CU as the second node as an example to illustrate the connection establishment method.
- Step 200 is the same as step 100 and will not be described again here.
- the DU migration process is negotiated between the IAB-DU's source IAB-donor and the IAB-DU's target IAB-donor.
- the IAB-DU's source IAB-donor obtains the transport network layer configuration for F1-C in the IAB-DU's target IAB-donor.
- F1-C is the first logical connection between IAB-DU2 and IAB-DU's target IAB-donor.
- the message for requesting transport network layer configuration is an XnAP message.
- Steps 204 to 208 are consistent with steps 103 to 107 and will not be described again here.
- Step 209 IAB-MT’s target IAB-donor-CU sends a feedback message to IAB-DU’s source IAB-donor-CU.
- the feedback message is an XnAP message, which is a message used to feedback the transport network layer configuration.
- the feedback message is used to feedback step 203.
- Steps 210 to 212 are consistent with steps 110 to 112 and are not described again here.
- connection establishment method is provided in an embodiment of the present disclosure.
- the following steps omit the content that is not related to this solution: the embodiment of the present disclosure takes IAB-node as the first node, IAB-DU’s Target IAB-donor-CU as the third node, IAB-MT’s target IAB-donor-CU and/or IAB-DU’s source IAB-donor-CU as the second node as an example to illustrate the connection establishment method.
- the IAB-DU’s source IAB-donor-CU decides to perform DU migration, negotiates DU migration with the IAB-DU’s target IAB-donor-CU, and obtains the transport network layer configuration for F1-C in the IAB-DU's target IAB-donor.
- Step 301 if the IAB-MT’s source IAB-donor-CU decides to instruct the IAB-MT to switch, before preparing for the switch, the IAB-MT’s source IAB-donor-CU sends a switch start notification message to the IAB-DU’s source IAB-donor-CU, and the switch start notification message includes the NG-RAN ID of the IAB-MT’s target IAB-donor-CU.
- the switching start notification information is included in the XnAP message.
- Step 302 the IAB-DU’s source IAB-donor-CU sends DU migration notification information to the IAB-MT’s source IAB-donor-CU, and the information includes the transport network layer configuration information for F1-C in the IAB-DU's target IAB-donor.
- the DU migration notification information is included in the XnAP message.
- Step 303 IAB-MT’s source IAB-donor-CU sends a switching request message to IAB-MT’s target IAB-donor-CU, wherein the message includes the transmission network layer configuration request information of IAB-DU2 and/or the transmission network layer configuration information for F1-C in IAB-DU's target IAB-donor.
- Step 304 IAB-MT’s target IAB-donor-CU sends a switching request confirmation message to IAB-MT’s source IAB-donor-CU, and the message includes an RRC reconfiguration message.
- the content included in the RRC reconfiguration message is consistent with that described in step 104 and will not be repeated here.
- Step 305 IAB-MT’s source IAB-donor-CU sends an RRC reconfiguration message to IAB-MT.
- Step 308 IAB-MT’s source IAB-donor-CU notifies IAB-DU’s source IAB-donor-CU, and IAB-MT switching is completed.
- step 310 the IAB-node sends an F1 Setup Request (F1 Setup Request, or F1 Setup) message to the IAB-DU’s target IAB-donor-CU based on the transport network layer configuration information obtained in step 304.
- F1 Setup Request F1 Setup Request, or F1 Setup
- the methods provided by the embodiments of the present disclosure are introduced from the perspectives of the first node, the second node and the third node respectively.
- the device includes: a transceiver module 11.
- the device further includes a processing module 12 .
- the processing module 12 is configured to establish a connection with the third node according to the transmission network layer configuration information.
- the transceiver module 11 is further configured to receive transmission network layer configuration information sent by a second node, wherein the second node is a host node to which the MT and/or the first DU is connected.
- the transmission network layer configuration information includes at least one of the following:
- the transceiver module 11 is configured to send a first indication message to the second node, wherein the first indication message is used to instruct the second node to send transmission network layer configuration information to the first node, the first node includes an MT, a first DU and a second DU, and the transmission network layer configuration information is used to instruct the second DU to establish a connection with a third node through a transmission path under a host node connected to the MT, the third node is different from the host node connected to the first DU, and the second node is a host node connected to the MT and/or the first DU.
- the communication device 1000 may include one or more processors 1001.
- the processor 1001 may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processing unit.
- the baseband processor may be used to process the communication protocol and the communication data
- the central processing unit may be used to control the communication device (such as a network side device, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a computer program, and process the data of the computer program.
- the communication device 1000 may further include one or more memories 1002, on which a computer program 1004 may be stored, and the memory 1002 executes the computer program 1004 so that the communication device 1000 executes the method described in the above method embodiment.
- data may also be stored in the memory 1002.
- the communication device 1000 and the memory 1002 may be provided separately or integrated together.
- the communication device 1000 may further include a transceiver 1005 and an antenna 1006.
- the transceiver 1005 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., for implementing a transceiver function.
- the transceiver 1005 may include a receiver and a transmitter, the receiver may be referred to as a receiver or a receiving circuit, etc., for implementing a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., for implementing a transmitting function.
- the communication device 1000 may further include one or more interface circuits 1007.
- the interface circuit 1007 is used to receive code instructions and transmit them to the processor 1001.
- the processor 1001 executes the code instructions to enable the communication device 1000 to execute the method described in the above method embodiment.
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Abstract
Description
Claims (23)
- 一种连接建立方法,其特征在于,所述方法由第一节点执行,所述方法包括:接收传输网络层配置信息,其中,所述第一节点包括MT、第一DU和第二DU,所述传输网络层配置信息用于指示所述第二DU通过所述MT连接的宿主节点下的传输路径与第三节点建立连接,所述第三节点不同于所述第一DU连接的宿主节点。
- 如权利要求1所述的方法,其特征在于,所述方法还包括:根据所述传输网络层配置信息,建立与所述第三节点之间的连接。
- 如权利要求1或2所述的方法,其特征在于,所述接收传输网络层配置信息,包括:接收所述第二节点发送的所述传输网络层配置信息,其中,所述第二节点为所述第一节点中的MT和/或第一DU连接的宿主节点。
- 如权利要求3所述的方法,其特征在于,所述接收所述第二节点发送的所述传输网络层配置信息,包括:接收所述第二节点发送的无线资源控制RRC重配置消息,其中,所述RRC重配置消息中包括所述传输网络层配置信息;或者接收所述第二节点发送的F1应用协议F1AP消息;其中,所述F1AP消息中包括所述传输网络层配置信息。
- 如权利要求4所述的方法,其特征在于,所述接收所述第二节点发送的RRC重配置消息,包括:接收所述第二节点在所述MT切换连接至所述第二节点的过程中发送的所述RRC重配置消息;或者接收所述第二节点在所述MT切换连接至所述第二节点后发送的所述RRC重配置消息。
- 如权利要求1至5中任一项所述的方法,其特征在于,所述传输网络层配置信息,包括以下至少一种:回传适配协议BAP地址信息;无线回传无线链路控制BH RLC通道信息;BAP路由标识配置信息;传输网络层TNL地址信息;用途指示信息。
- 一种连接建立方法,其特征在于,所述方法由第二节点执行,包括:向第一节点发送传输网络层配置信息,其中,所述第一节点包括MT、第一DU和第二DU,所述传输网络层配置信息用于指示所述第二DU通过所述MT连接的宿主节点下的传输路径与第三节点建立连接,所述第三节点不同于所述第一DU连接的宿主节点,所述第二节点为所述MT和/或所述第一DU连接的宿主节点。
- 如权利要求7所述的方法,其特征在于,所述向第一节点发送传输网络层配置信息,包括:向所述第一节点的MT发送RRC重配置消息,其中,所述RRC重配置消息中包括所述传输网络层配置信息;或者向所述第一节点的第一DU发送F1AP消息;其中,所述F1AP消息中包括所述传输网络层配置信息。
- 如权利要求8所述的方法,其特征在于,所述向所述第一节点的MT发送RRC重配置消息,包括:在所述第一节点的MT切换连接至所述第二节点的过程中,向所述第一节点的MT发送RRC重配置消息;或者在所述第一节点的MT切换连接至所述第二节点后,向所述第一节点的MT发送RRC重配置消息。
- 如权利要求7至9中任一项所述的方法,其特征在于,所述传输网络层配置信息,包括以下至少一种:回传适配协议BAP地址信息;无线回传无线链路控制BH RLC通道信息;BAP路由标识配置信息;传输网络层TNL地址信息;用途指示信息。
- 如权利要求7至10中任一项所述的方法,其特征在于,所述方法还包括:接收所述第三节点发送的第一指示信息;或者响应于所述MT与所述第二节点连接且所述第一DU未与所述第二节点连接,接收所述第一DU连接的宿主节点发送的第一指示信息;或者响应于所述第一DU与所述第二节点连接且所述MT未与所述第二节点连接,接收所述MT连接的宿主节点发送的第一指示信息;其中,所述第一指示信息用于指示所述第二节点向所述第一节点发送所述传输网络层配置信息。
- 如权利要求11所述方法,其特征在于,所述第一指示信息,包括以下至少一项:用于为所述第一节点配置所述传输网络层配置信息的指示;所述第一节点的MT在所述第二节点上的标识。
- 一种连接建立方法,其特征在于,所述方法由第三节点执行,所述方法包括:向第二节点发送第一指示信息,其中,所述第一指示信息用于指示所述第二节点向所述第一节点发送所述传输网络层配置信息,所述第一节点包括MT、第一DU和第二DU,所述传输网络层配置信息用于指示所述第二DU通过所述MT连接的宿主节点下的传输路径与第三节点建立连接,所述第三节点不同于所述第一DU连接的宿主节点,所述第二节点为所述MT和/或所述第一DU连接的宿主节点。
- 如权利要求13所述方法,其特征在于,所述第一指示信息,包括以下至少一项:用于为所述第一节点配置所述传输网络层配置信息的指示;所述第一节点的MT在所述第二节点上的标识。
- 如权利要求13或14所述的方法,其特征在于,所述传输网络层配置信息,包括以下至少一种:回传适配协议BAP地址信息;无线回传无线链路控制BH RLC通道信息;BAP路由标识配置信息;传输网络层TNL地址信息;用途指示信息。
- 如权利要求13至15中任一项所述的方法,其特征在于,所述方法包括:接收所述第一DU连接的宿主节点发送的第二指示信息,其中,所述第二指示信息用于指示所述第三节点向所述第二节点发送所述第一指示信息。
- 如权利要求16所述的方法,其特征在于,所述第二指示信息,包括以下至少一项:用于为所述第一节点配置所述传输网络层配置信息的指示;所述第二节点的标识;所述第一节点的MT在所述第二节点上的标识。
- 一种通信装置,其特征在于,应用于第一节点,所述装置包括:收发模块,被配置为接收传输网络层配置信息,其中,所述第一节点包括MT、第一DU和第二DU,所述传输网络层配置信息用于指示所述第二DU通过所述MT连接的宿主节点下的传输路径与第三节点建立连接,所述第三节点不同于所述第一DU连接的宿主节点。
- 一种通信装置,其特征在于,应用于第二节点,所述装置包括:收发模块,被配置为向第一节点发送传输网络层配置信息,其中,所述第一节点包括MT、第一DU和第二DU,所述传输网络层配置信息用于指示所述第二DU通过所述MT连接的宿主节点下的传输路径与第三节点建立连接,所述第三节点不同于所述第一DU连接的宿主节点,所述第二节点为所述MT和/或所述第一DU连接的宿主节点。
- 一种通信装置,其特征在于,应用于第三节点,所述装置包括:收发模块,被配置为向第二节点发送第一指示信息,其中,所述第一指示信息用于指示所述第二节点向所述第一节点发送所述传输网络层配置信息,所述第一节点包括MT、第一DU和第二DU,所述传输网络层配置信息用于指示所述第二DU通过所述MT连接的宿主节点下的传输路径与第三节点建立连接,所述第三节点不同于所述第一DU连接的宿主节点,所述第二节点为所述MT和/或所述第一DU连接的宿主节点。
- 一种通信装置,其特征在于,所述装置包括处理器和存储器,所述存储器中存储有计算机程序,所述处理器执行所述存储器中存储的计算机程序,以使所述装置执行如权利要求1至6中任一项所述的方法,或者,以使所述装置执行如权利要求7至12中任一项所述的方法,或者,以使所述装置执行如权利要求13至17中任一项所述的方法。
- 一种通信装置,其特征在于,包括:处理器和接口电路;所述接口电路,用于接收代码指令并传输至所述处理器;所述处理器,用于运行所述代码指令以执行如权利要求1至6中任一项所述的方法,或用于运行所述代码指令以执行如权利要求7至12中任一项所述的方法,或用于运行所述代码指令以执行如权利要求13至17中任一项所述的方法。
- 一种计算机可读存储介质,用于存储有指令,当所述指令被执行时,使如权利要求1至6中任一项所述的方法被实现,或者,使如权利要求7至12中任一项所述的方法被实现,或者,使如权利要求13至17中任一项所述的方法被实现。
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| EP4173363A1 (en) * | 2020-06-25 | 2023-05-03 | Telefonaktiebolaget LM ERICSSON (PUBL) | Improved f1 setup during iab handover |
| CN113873587B (zh) * | 2020-06-30 | 2023-09-22 | 华为技术有限公司 | 一种用于iab网络通信的方法及相关设备 |
| KR20230091856A (ko) * | 2020-10-22 | 2023-06-23 | 지티이 코포레이션 | 도너 간 모빌리티를 위한 방법 및 장치 |
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2022
- 2022-12-28 CN CN202280006121.XA patent/CN118575517A/zh active Pending
- 2022-12-28 WO PCT/CN2022/143014 patent/WO2024138458A1/zh not_active Ceased
- 2022-12-28 EP EP22969609.1A patent/EP4645954A4/en active Pending
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| US20220312287A1 (en) * | 2019-08-16 | 2022-09-29 | Nokia Technologies Oy | Device, method, apparatus and computer readable medium for inter-cu topology adaptation |
| US20210410031A1 (en) * | 2020-06-29 | 2021-12-30 | Qualcomm Incorporated | Techniques for associating integrated access and backhaul (iab) nodes with different upstream nodes |
| CN114390601A (zh) * | 2020-10-16 | 2022-04-22 | 大唐移动通信设备有限公司 | 控制信令传输方法、装置、iab节点、源宿主和目标宿主 |
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| YING HUANG, ZTE: "Discussion on enhancements to UE migration in mobile IAB scenario", 3GPP TSG-RAN WG3 #118 R3-226383, 4 November 2022 (2022-11-04), XP052223867 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4645954A4 (en) | 2026-02-18 |
| CN118575517A (zh) | 2024-08-30 |
| EP4645954A1 (en) | 2025-11-05 |
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