Method and device for updating configuration information of downstream devices during inter-host migration

Abstract

The present disclosure describes methods, systems, and devices for updating configuration information of downstream devices of a migrated access backhaul integrated node (IAB node) during an inter-host migration from a source IAB host to a target IAB host. The method includes providing updated configuration information to system information by an IAB host centralized unit (CU), the system information being included in a system information block (SIB) other than SIB1 carried in a SystemInformation (SI) message, and encoding the system information with the updated configuration information. The method also includes sending the system information including the updated configuration information as a radio resource control (RRC) container to a migrated IAB node distributed unit (DU) by the IAB host CU via an F1‑AP. The method also includes the migrated IAB node DU forwarding the system information including the updated configuration information to downstream devices via a dedicated RRC message.

Description

Technical Field

[0001] The disclosure is generally directed to wireless communications. In particular, the disclosure relates to methods and devices for updating configuration information of downstream devices during inter-host migration. Background Art

[0002] Wireless communication technology is driving the world towards an increasingly connected and networked society. Compared with Long Term Evolution (LTE), the fifth generation (5G) New Radio (NR) technology has a wider spectrum, for example, including millimeter wave (mmWave) bands. With the development of massive multiple input multiple output (MIMO) and / or multi-beam systems, 5G NR can provide faster speeds and shorter latency.

[0003] 5G NR may include an integrated access backhaul (IAB) implementation. An IAB implementation may include one or more IAB hosts and multiple connected IAB nodes. Currently, there are challenges and / or problems associated with configuring IAB nodes, particularly when an IAB node is migrated from one IAB host to another IAB host.

[0004] The present disclosure may address at least some of the challenges / problems associated with existing systems to improve the performance of wireless communications. Summary of the invention

[0005] The present application relates to methods, systems and devices for wireless communications, and more particularly, to methods, systems and devices for updating configuration information of downstream devices of a migrated integrated access backhaul node (IAB node) during inter-host migration.

[0006] In one embodiment, the present disclosure describes a method for wireless communication. The method includes: during inter-host migration from a source IAB host to a target IAB host, updating the configuration information of the downstream device of the migrated access backhaul integrated node (IAB node) by the following steps: providing the updated configuration information to the system information by the IAB host centralized unit (CU), the system information is included in the system information block (SIB) other than SIB1 carried in the SystemInformation (SI) message, and encoding the system information with the updated configuration information; and sending the system information including the updated configuration information as a radio resource control (RRC) container to the migrated IAB node distributed unit (DU) via F1-AP by the IAB host CU, so that the migrated IAB node DU forwards the system information including the updated configuration information to the downstream device through a dedicated RRC message.

[0007] In another embodiment, the present disclosure describes a method for wireless communication. The method includes: during an inter-host migration from a source IAB host to a target IAB host, updating configuration information of a downstream device of a migrated access backhaul integrated node (IAB node) by: providing the updated configuration information to system information by a migrated IAB node distributed unit (DU), the system information being included in a master information block (MIB) or a system information block-1 (SIB1), and encoding the system information with the updated configuration information; and sending the system information included in the MIB or SIB1 to the downstream device by the migrated IAB node DU through a dedicated RRC message.

[0008] In another embodiment, the present disclosure describes a method for wireless communication. The method includes: during an inter-host migration from a source IAB host to a target IAB host, updating the configuration information of a downstream device of a migrated access backhaul integrated node (IAB node) by the following steps: providing the updated configuration information to the system information by the IAB host centralized unit (CU), the system information is included in the system information block (SIB) other than SIB1 carried in the SystemInformation (SI) message, and encoding the system information with the updated configuration information; and sending the system information including the updated configuration information as a radio resource control (RRC) container to the migrated IAB node distributed unit (DU) via F1-AP by the IAB host CU, so that the migrated IAB node DU periodically broadcasts the SystemInformation (SI) message including the updated configuration information to the downstream device.

[0009] In another embodiment, the present disclosure describes a method for wireless communication. The method includes updating configuration information of downstream devices of a migrated access backhaul integrated node (IAB node) during an inter-host migration from a source IAB host to a target IAB host by: providing the updated configuration information to system information by a migrated IAB node distributed unit (DU), the system information being included in a master information block (MIB) or a system information block-1 (SIB1), and encoding the system information with the updated configuration information; and periodically broadcasting the system information in the MIB or SIB1 to downstream devices by the migrated IAB node DU.

[0010] In another embodiment, the present disclosure describes a method for wireless communication. The method includes: during an inter-host migration from a source IAB host to a target IAB host, updating configuration information of a downstream device of a migrated access backhaul integrated node (IAB node) by: providing the updated configuration information in an RRCReconfiguration message by a migrated IAB node distributed unit (DU); and sending an RRCReconfiguration message including the updated configuration information to the downstream device by the migrated IAB node DU.

[0011] In another embodiment, the present disclosure describes a method for wireless communication. The method includes updating configuration information of a downstream device of a migrated access backhaul integrated node (IAB node) during an inter-host migration from a source IAB host to a target IAB host by: providing the updated configuration information into a backhaul adaptation protocol (BAP) control protocol data unit (PDU) by a migrated IAB node distributed unit (DU); and sending the BAP control PDU including the updated configuration information to the downstream device by the migrated IAB node DU.

[0012] In another embodiment, the present disclosure describes a method for wireless communication. The method includes updating configuration information of a downstream device of a migrated access backhaul integrated node (IAB node) during an inter-host migration from a source IAB host to a target IAB host by the following steps: providing the updated configuration information to a media access control (MAC) control element (CE) by a migrated IAB node distributed unit (DU), and sending a MAC CE including the updated configuration information to the downstream device by the migrated IAB node DU.

[0013] In some other embodiments, an apparatus for wireless communication may include a memory storing instructions and a processing circuit in communication with the memory. When the processing circuit executes the instructions, the processing circuit is configured to perform the above method.

[0014] In some other embodiments, a device for wireless communication may include a memory storing instructions and a processing circuit in communication with the memory. When the processing circuit executes the instructions, the processing circuit is configured to perform the above method.

[0015] In some other embodiments, a computer-readable medium includes instructions that, when executed by a computer, cause the computer to perform the above method.

[0016] The above and other aspects and embodiments thereof are described in more detail in the drawings, the description and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A An example of a wireless communication system including an Integrated Access Backhaul (IAB) system is shown.

[0018] Figure 1B Another example of the architecture of an IAB system is shown.

[0019] Figure 2 An example of an IAB host or an IAB node is shown.

[0020] Figure 3 An example of a user device is shown.

[0021] Figure 4 A schematic diagram showing migrating IAB nodes in inter-host migration.

[0022] Figure 5A A flow chart of a method for wireless communication is shown.

[0023] Figure 5B A flow chart of a method for wireless communication is shown.

[0024] Fig. 6A Shows Figure 5A An exemplary logic flow of a method for wireless communication in.

[0025] Figure 6B Shows Figure 5B An exemplary logic flow of a method for wireless communication in.

[0026] Fig. 7A A flow chart of a method for wireless communication is shown.

[0027] Figure 7B A flow chart of a method for wireless communication is shown.

[0028] Fig. 8A Shows Fig. 7A An exemplary logic flow of a method for wireless communication in.

[0029] Figure 8B Shows Figure 7B An exemplary logic flow of a method for wireless communication in.

[0030] Fig. 9 A flow chart of a method for wireless communication is shown.

[0031] Fig.10 Shows Fig. 9 An exemplary logic flow of a method for wireless communication in.

[0032] Fig.11 A flow chart of a method for wireless communication is shown.

[0033] Fig.12 Shows Fig.11 An exemplary logic flow of a method for wireless communication in.

[0034] Fig.13 A flow chart of a method for wireless communication is shown.

[0035] Fig.14 Shows Fig.13 An exemplary logic flow of a method for wireless communication in. DETAILED DESCRIPTION

[0036] The present disclosure will now be described in detail below with reference to the accompanying drawings, which form a part of the present disclosure and show specific examples of embodiments by way of illustration. However, it is noted that the present disclosure may be embodied in a variety of different forms, and therefore, the subject matter covered or claimed is intended to be construed as not limited to any embodiment to be set forth below.

[0037] Throughout the specification and claims, terms may have nuanced meanings suggested or implied by the context rather than just the explicitly stated meanings. Likewise, the phrases "in one embodiment" or "in some embodiments" as used herein do not necessarily refer to the same embodiment, and the phrases "in another embodiment" or "in other embodiments" as used herein do not necessarily refer to different embodiments. The phrases "in one embodiment" or "in some embodiments" as used herein do not necessarily refer to the same embodiment, and the phrases "in another embodiment" or "in other embodiments" as used herein do not necessarily refer to different embodiments. For example, the claimed subject matter is intended to include, in whole or in part, exemplary embodiments or combinations of embodiments.

[0038] In general, terms can be understood at least in part from their use in context. For example, terms such as "and", "or" or "and / or" as used herein can include various meanings that can depend at least in part on the context in which such terms are used. Typically, "or", if used in an association list such as A, B or C, is intended to represent A, B and C used in an inclusive sense here, and A, B or C used in an exclusive sense here. In addition, the terms "one or more" or "at least one" used herein (depending at least in part on the context) can be used to describe any feature, structure or characteristic in a singular sense, or can be used to describe a combination of features, structures or characteristics in a plural sense. Similarly, terms such as "a", "an" or "the" can also be understood to convey singular usage or to convey plural usage, depending at least in part on the context. In addition, the term "based on" or "determined by..." can be understood to not necessarily be intended to convey a set of exclusive factors, but on the contrary, additional factors that are not necessarily explicitly described can be allowed to exist, again, depending at least in part on the context.

[0039] The present disclosure describes methods and apparatus for updating configuration information for downstream devices of a migrating Integrated Access Backhaul Node (IAB Node) during inter-host migration.

[0040] Next generation (NG) or fifth generation (5G) wireless communications can provide a range of capabilities from high-speed downloads to supporting real-time low-latency communications. Compared to long-term evolution (LTE), 5G new radio (NR) technology has a wider spectrum, including, for example, millimeter wave (mmWave) bands. With the development of massive multiple-input multiple-output (MIMO) and / or multi-beam systems, 5G NR can provide faster speeds and shorter delays. 5G NR may include the development of integrated access backhaul (IAB) implementations. IAB implementations may include one or more IAB hosts and multiple connected IAB nodes. IAB implementations communicate between one or more IAB hosts and one or more IAB nodes via wireless backhaul and relay links. IAB implementations may provide flexible NR cell configurations and increase cell density without increasing the density of IAB hosts.

[0041] The IAB system may include one or more IAB hosts and one or more IAB nodes, which together provide wireless connection services to one or more user equipment (UE) (e.g., smartphones). The IAB host and the IAB node may be a wireless network base station including an NG radio access network (NG-RAN) base station, which may include a node B (NB, such as a gNB) in a mobile telecommunications environment. The IAB host may provide access backhaul to one or more connected sub-IAB nodes, and may be connected to the core network via wired communication. In one embodiment, the core network may include a 5G core network (5GC). In another embodiment, the wired communication may include optical fiber transmission communication. The IAB node may include a wireless access link and a wireless backhaul link. The wireless access link may be used for communication between the UE and the IAB node. The wireless backhaul link may be used for communication between the IAB node and the IAB host, and / or communication between one IAB node and another IAB node. Therefore, the IAB node does not require a wired communication network for data backhaul. In some embodiments, the IAB node does not include a wired communication network for data backhaul, making the IAB node more flexible and easier to implement, reducing the burden of implementing a wired communication network. The access link and the backhaul link may use transmission bands having the same frequency (referred to as in-band relaying) or use transmission bands having different frequencies (referred to as out-of-band relaying).

[0042] refer to Figure 1A and Figure 1B , the IAB host 130 may provide access backhaul 140 to one or more connected child IAB nodes (152 and 154). The IAB host 130 may be connected to the core network 110 via wired communication 120. In one embodiment, the core network 110 may include a 5G core network (5GC). In another embodiment, the wired communication 120 may include optical fiber transmission communication.

[0043] The IAB host can provide a wireless connection to one or more user equipment (UE). The UE can be a mobile device, such as a smart phone or a mobile communication module set in a vehicle. For example, the IAB host 130 can provide a wireless connection 160 to the UE 172.

[0044] Similarly, without limitation, a child IAB node may provide wireless connectivity to one or more UEs. For example, IAB node 152 may provide wireless connectivity 160 to UE 174.

[0045] Similarly, without limitation, a child IAB node may provide access backhaul to one or more connected grandchild IAB nodes. For example, IAB node 154 may provide access backhaul 140 to IAB node 156. Similarly, without limitation, a grandchild IAB node may also provide access backhaul to one or more connected great-grandchild IAB nodes, and / or provide wireless connectivity to one or more UEs.

[0046] refer to Figure 1B , the IAB system 100 may include more than one IAB host (130 and 135). Each of the IAB hosts may be connected to the core network (e.g., 5GC) 110 via wired communication 120. In one embodiment, the IAB host 135 may provide access backhaul 140 to one or more connected child IAB nodes 158; and the IAB node 158 may provide wireless connection 160 to one or more UEs 176.

[0047] IAB node 156 currently connected to IAB host 130 via IAB node 154 may migrate to IAB host 135. This may be referred to as an inter-host migration, and IAB node 156 may be referred to as a migrated IAB node. Currently, there are challenges and / or problems associated with configuring a migrated IAB node during an inter-host migration.

[0048] The present disclosure describes embodiments of methods and apparatus for updating configuration information for downstream devices of a migrating IAB node during inter-host migration, addressing at least some of the challenges discussed above.

[0049] Figure 2 An exemplary wireless communication base station 200 is shown. The wireless communication base station 200 may be Figure 1A and Figure 1B 200 and / or the like. The base station 200 may include wireless transmit / receive (Tx / Rx) circuitry 208 to send / receive communications with one or more UEs and / or communications with one or more other base stations. The base station may also include network interface circuitry 209 to enable the base station to communicate with other base stations and / or a core network (e.g., optical or wired interconnect, Ethernet, and / or other data transmission media / protocols). The base station 200 may optionally include an input / output (I / O) interface 206 to communicate with an operator or the like.

[0050] The base station may also include system circuitry 204. System circuitry 204 may include one or more processors 221 and / or memory 222. Memory 222 may include an operating system 224, instructions 226, and parameters 228. Instructions 226 may be configured for one or more processors 124 to perform functions of the base station. Parameters 228 may include parameters that support the execution of instructions 226. For example, the parameters may include network protocol settings, bandwidth parameters, radio frequency mapping allocations, and / or other parameters.

[0051] Figure 3 An exemplary user equipment (UE) 300 is shown. UE 300 may be a mobile device, such as a smartphone or a mobile communication module provided in a vehicle. UE 300 may be Figure 1A and Figure 1B UE 300 may include a communication interface 302, a system circuit 304, an input / output interface (I / O) 306, a display circuit 308, and a memory 309. The display circuit may include a user interface 310. The system circuit 304 may include any combination of hardware, software, firmware, or other logic / circuitry. The system circuit 304 may be implemented, for example, with one or more system-on-chips (SoCs), application-specific integrated circuits (ASICs), discrete analog and digital circuits, and other circuits. The system circuit 304 may be part of the implementation of any desired functionality in the UE 300. In this regard, the system circuit 304 may include logic to facilitate operations such as decoding and playing music and video (e.g., MP3, MP4, MPEG, AVI, FLAC, AC3, or WAV decoding and playback); running applications; accepting user input; saving and retrieving application data; establishing, maintaining, and terminating a cellular phone call or, as an example, a data connection for an Internet connection; establishing, maintaining, and terminating a wireless network connection, a Bluetooth connection, or other connection; and displaying relevant information on a user interface 310. The user interface 310 and input / output (I / O) interface 306 may include a graphical user interface, a touch-sensitive display, tactile feedback or other tactile output, voice or facial recognition input, buttons, switches, speakers, and other user interface elements. Additional examples of I / O interface 306 may include microphones, video and still image cameras, temperature sensors, vibration sensors, rotation and orientation sensors, headphone and microphone input / output jacks, universal serial bus (USB) connectors, memory card slots, radiation sensors (e.g., IR sensors), and other types of inputs.

[0052] refer to Figure 3, the communication interface 302 may include radio frequency (RF) transmit (Tx) and receive (Rx) circuits 316 that handle the transmission and reception of signals through one or more antennas 314. The communication interface 302 may include one or more transceivers. The transceiver may be a wireless transceiver that includes modulation / demodulation circuitry, digital-to-analog converters (DACs), shaping tables, analog-to-digital converters (ADCs), filters, waveform shapers, filters, preamplifiers, power amplifiers, and / or other logic for transmitting and receiving through one or more antennas or (for some devices) through a physical (e.g., wired) medium. The signals transmitted and received may follow any of a variety of arrays of formats, protocols, modulations (e.g., QPSK, 16-QAM, 64-QAM, or 256-QAM), channels, bit rates, and encodings. As a specific example, the communication interface 302 may include a transceiver that supports transmission and reception under 2G, 3G, BT, WiFi, Universal Mobile Telecommunications System (UMTS), High Speed ​​Packet Access (HSPA) +, 4G / Long Term Evolution (LTE), and 5G standards. However, the techniques described below are applicable to other wireless communication technologies, whether derived from the Third Generation Partnership Project (3GPP), GSM Association, 3GPP2, IEEE, or other partners or standards bodies.

[0053] refer to Figure 3 , the system circuit 304 may include one or more processors 321 and a memory 322. The memory 322 stores, for example, an operating system 324, instructions 326, and parameters 328. The processor 321 is configured to execute the instructions 326 to perform the desired functions of the UE 300. The parameters 328 may provide and specify configuration and operating options for the instructions 326. The memory 322 may also store any BT, WiFi, 3G, 4G, 5G, or other data that the UE 300 will send or has received through the communication interface 302. In various embodiments, the system power of the UE 300 may be provided by a power storage device such as a battery or a transformer.

[0054] The present disclosure describes several embodiments of methods and devices for updating configuration information of downstream devices of a migrated IAB node during inter-host migration, which may be partially or completely described in the above Figure 2 and Figure 3 The method is implemented on one or more wireless network base stations and / or one or more user devices described in the method.

[0055] refer to Figure 4, the IAB system 400 may include two IAB hosts (410 and 420). The IAB node 450 currently connected to the IAB host 410 via the IAB node 430 may be migrated to the IAB host 420 via the IAB node 440. This may be referred to as inter-host migration. The IAB host 450 may be a migrated IAB node; the IAB host 410 may be a source IAB host; the IAB node 430 may be a source parent IAB node; the IAB host 420 may be a target IAB host; and the IAB node 440 may be a target parent IAB node.

[0056] The source IAB host 410 may include a centralized unit (CU) 412 and a distributed unit (DU) 414, and the source IAB host CU 412 may communicate with the source IAB host DU 414. The source parent IAB node 430 communicating with the source IAB host 410 may include a mobile terminal (MT) 432 and a distributed unit (DU) 434. The target IAB host 420 may include a CU 422 and a DU 424, and the target IAB host CU 422 may communicate with the target IAB host DU 424. The target IAB node 440 communicating with the target IAB host 420 may include a MT 442 and a DU 444.

[0057] Prior to inter-host migration, the migrated IAB node 450 may communicate with the source parent IAB node 430. The migrated IAB node 450 may include an MT 452 and a DU 454. In one embodiment, the migrated IAB node 450 may communicate with a UE 470. In another embodiment, the migrated IAB node 450 may communicate with a child IAB node 460. The child IAB node 460 may include an MT 462 and a DU 464.

[0058] refer to Figure 4 , the migrated IAB node 450 may change its attachment point from the source parent IAB node 430 connected to the source IAB host 410 to the target IAB node 440 connected to the target IAB host 420. In one embodiment, a handover (HO) process may occur during inter-host migration, and this may be an inter-CU HO scenario. The migrated IAB node DU 454 may communicate with the target IAB host CU 422 via the F1-AP 482.

[0059] refer to Figure 5A and Figure 5BThe present disclosure describes various embodiments of a method for updating configuration information of a downstream device of a migrated IAB node using a radio resource control (RRC) message during inter-host migration. In one embodiment, the downstream device may include one or more user equipments (UEs) and / or one or more child IAB node mobile terminals (MTs). The updated configuration information may include at least one of a new radio (NR) physical cell identity (PCI) or a NR cell global identity (CGI).

[0060] refer to Figure 5A , method 500 may include part or all of the following steps: step 510: the IAB host centralized unit (CU) provides updated configuration information to the system information, which is included in the system information block (SIB) other than SIB1 carried in the SystemInformation (SI) message, and encodes the system information with the updated configuration information; step 520: the IAB host CU sends the system information containing the updated configuration information as a radio resource control (RRC) container to the migrated IAB node distributed unit (DU) via F1-AP; and step 530: the migrated IAB node DU forwards the system information including the updated configuration information to the downstream device through a dedicated RRC message.

[0061] refer to Figure 5B , method 550 may include some or all of the following steps: step 560: the migrated IAB node distributed unit (DU) provides updated configuration information to system information, which is included in a master information block (MIB) or a system information block-1 (SIB1), and encodes the system information with the updated configuration information; and step 570: the migrated IAB node DU sends the system information included in the MIB or SIB1 to the downstream device through a dedicated RRC message.

[0062] Fig. 6A and Figure 6B A logic flow of various methods for updating configuration information of downstream devices of a migrated IAB node using RRC messages during inter-host migration is shown.

[0063] refer to Fig. 6AIn step 610 of the embodiment, the IAB host CU 602 may provide the updated configuration information to the system information, which is included in the system information block (SIB) other than SIB1 carried in the SystemInformation (SI) message, and encodes the system information with the updated configuration information. In one embodiment, the IAB host CU 602 may include a source IAB host CU. In another embodiment, the IAB host CU 602 may include a target IAB host CU.

[0064] refer to Fig. 6A In step 620, the IAB host CU 602 may send the system information as a radio resource control (RRC) container to the migrated IAB node distributed unit (DU) 454 via the F1-AP. The system information includes updated configuration information.

[0065] refer to Fig. 6A In step 630a, upon receiving the system information as an RRC container, the migrated IAB node DU 454 may forward the system information including the updated configuration information to the downstream UE 470 via a dedicated RRC message. The updated configuration information may include one or more of the following: a new radio (NR) physical cell identity (PCI) or an NR cell global identity (CGI).

[0066] refer to Fig. 6A In step 630b, upon receiving the system information as an RRC container, the migrated IAB node DU454 may forward the system information including the updated configuration information to the downstream child IAB node MT462 via a dedicated RRC message. The updated configuration information may include one or more of the following: a new radio (NR) physical cell identity (PCI), or an NR cell global identity (CGI).

[0067] In one embodiment, step 630a may be performed earlier than step 630b. In another embodiment, step 630a may be performed later than step 630b.

[0068] Optionally and alternatively, reference Figure 6B In step 660 of the embodiment, the migrated IAB node distributed unit (DU) 454 may provide updated configuration information to system information, which is included in a master information block (MIB) or a system information block-1 (SIB1), and may encode the system information with the updated configuration information. Figure 6B In step 670a of the embodiment, the migrated IAB node DU 454 may send the system information contained in the MIB or SIB1 to the downstream UE 470 via a dedicated RRC message. Figure 6BIn step 670b, the migrated IAB node DU 454 may send the system information contained in the MIB or SIB1 to the downstream child IAB node MT 462 through a dedicated RRC message. The updated configuration information may include one or more of the following: a new radio (NR) physical cell identity (PCI) or an NR cell global identity (CGI). In one embodiment, step 670a may be performed earlier than step 670b. In another embodiment, step 670a may be performed later than step 670b.

[0069] refer to Fig. 7A and Figure 7B The present disclosure describes various embodiments of a method for broadcasting updated configuration information for downstream devices of a migrating IAB node during inter-host migration. In one embodiment, the downstream devices may include one or more user equipment (UE) and / or one or more child IAB node mobile terminals (MT). The updated configuration information may include at least one of a new radio (NR) physical cell identity (PCI) or a NR cell global identity (CGI).

[0070] refer to Fig. 7A , method 700 may include part or all of the following steps: step 710: the IAB host centralized unit (CU) provides updated configuration information to the system information, which is included in the system information block (SIB) other than SIB1 carried in the SystemInformation (SI) message, and encodes the system information with the updated configuration information; step 720: the IAB host CU sends the system information including the updated configuration information as a radio resource control (RRC) container to the migrated IAB node distributed unit (DU) via F1-AP; and step 730: the migrated IAB node DU periodically broadcasts the SystemInformation (SI) message including the updated configuration information to the downstream device.

[0071] refer to Figure 7B , method 750 may include part or all of the following steps: step 760: the migrated IAB node distributed unit (DU) provides updated configuration information to system information, which is included in a master information block (MIB) or a system information block-1 (SIB1), and encodes the system information with the updated configuration information; and step 770: the migrated IAB node DU periodically broadcasts the system information in the MIB or SIB1 to downstream devices.

[0072] Fig. 8A and Figure 8BA logical flow of various methods for broadcasting updated configuration information for downstream devices of a migrating IAB node during an inter-host migration is shown.

[0073] refer to Fig. 8A In step 810 of the embodiment, the IAB host CU 802 may provide updated configuration information to the system information, which is included in the system information block (SIB) other than SIB1 carried in the SystemInformation (SI) message, and encodes the system information with the updated configuration information. In one embodiment, the IAB host CU 802 may include a source IAB host CU. In another embodiment, the IAB host CU 802 may include a target IAB host CU.

[0074] refer to Fig. 8A In step 820, the IAB host CU 802 may send the IAB node distributed unit (DU) of the migration as a radio resource control (RRC) container via F1-AP system information. The system information includes updated configuration information.

[0075] refer to Fig. 8A In step 830a, upon receiving the SIB message, the source IAB host CU 412 may periodically broadcast a System Information (SI) message including updated configuration information to the downstream UE 470. The updated configuration information may include one or more of the following: a new radio (NR) physical cell identity (PCI), or an NR cell global identity (CGI).

[0076] refer to Fig. 8A In step 830b, upon receiving the SIB message, the source IAB host CU 412 may periodically broadcast a System Information (SI) message including updated configuration information to the downstream child IAB node MT 462. The updated configuration information may include one or more of the following: a new radio (NR) physical cell identity (PCI) or an NR cell global identity (CGI).

[0077] In one embodiment, step 830a may be performed earlier than step 830b. In another embodiment, step 830a may be performed later than step 830b.

[0078] Optionally and alternatively, reference Figure 8B In step 860 of the embodiment, the migrated IAB node distributed unit (DU) 454 may provide updated configuration information to system information, which is included in a master information block (MIB) or a system information block-1 (SIB1), and may encode the system information with the updated configuration information. Figure 8B In step 870a of FIG. 8 , the migrated IAB node DU 454 may periodically broadcast system information contained in the MIB or SIB1 to the downstream UE 470. Figure 8B In step 870b, the migrated IAB node DU 454 may periodically broadcast system information contained in the MIB or SIB1 to the downstream child IAB node MT 462. The updated configuration information may include one or more of the following: a new radio (NR) physical cell identifier (PCI), or a NR cell global identifier (CGI). In one embodiment, step 870a may be performed earlier than step 870b. In another embodiment, step 870a may be performed later than step 870b.

[0079] refer to Fig. 9 , the present disclosure describes various embodiments of a method 900 for updating configuration information of a downstream device of a migrated IAB node using an RRCReconfigeration message during inter-host migration. In one embodiment, the downstream device may include one or more user equipment (UE) and / or one or more sub-IAB node mobile terminals (MT). The updated configuration information may include at least one of a new radio (NR) physical cell identity (PCI), an NR cell global identity (CGI), or a public land mobile network (PLMN) identity. In another embodiment, when the downstream device includes a sub-IAB node MT, the updated configuration information may include an Internet Protocol (IP) address.

[0080] Method 900 may include part or all of the following steps: Step 910: The migrated IAB node distributed unit (DU) provides updated configuration information into an RRCReconfigeration message; and Step 920: The migrated IAB node DU sends an RRCReconfigeration message including the updated configuration information to a downstream device.

[0081] Fig.10 A logic flow of a method 1000 for updating configuration information of downstream devices of a migrated IAB node using RRCReconfiguration messages during inter-host migration is shown.

[0082] refer to Fig.10 In step 1010, the migrated IAB node DU 454 may provide updated configuration information in an RRCReconfiguration message. The RRCReconfiguration message includes the updated configuration information.

[0083] refer to Fig.10In step 1020a, the migrated IAB node DU 454 may send an RRCReconfiguration message including updated configuration information to the downstream UE 470. The updated configuration information may include one or more of the following: a new radio (NR) physical cell identity (PCI), an NR cell global identity (CGI), or a public land mobile network (PLMN) identity.

[0084] refer to Fig.10 In step 1020b, the migrated IAB node DU 454 may send an RRCReconfiguration message including updated configuration information to the downstream child IAB node MT 462. The updated configuration information may include one or more of the following: a new radio (NR) physical cell identity (PCI), an NR cell global identity (CGI), a public land mobile network (PLMN) identity, or an Internet Protocol (IP) address. In another embodiment, the updated configuration information may include an Internet Protocol (IP) address.

[0085] In one embodiment, step 1020a may be performed earlier than step 1020b. In another embodiment, step 1020a may be performed later than step 1020b.

[0086] refer to Fig.11 , the present disclosure describes various embodiments of a method 1100 for updating configuration information of a downstream device of a migrated IAB node using a backhaul adaptation protocol (BAP) control protocol data unit (PDU) during inter-host migration. In one embodiment, the downstream device may include one or more child IAB node mobile terminals (MTs). The updated configuration information may include at least one of a new radio (NR) physical cell identity (PCI), an NR cell global identity (CGI), or a public land mobile network (PLMN) identity.

[0087] Method 1100 may include some or all of the following steps: step 1110: the migrated IAB node distributed unit (DU) provides updated configuration information into a backhaul adaptation protocol (BAP) control protocol data unit (PDU); and step 1120: the migrated IAB node DU sends the BAP control PDU including the updated configuration information to a downstream device.

[0088] Fig.12 A logic flow of a method 1200 for updating configuration information of downstream devices of a migrating IAB node using a BAP Control PDU during inter-host migration is shown.

[0089] refer to Fig.12In step 1210 of , the migrated IAB node DU 454 may provide updated configuration information into a BAP control PDU.

[0090] refer to Fig.12 In step 1220, the migrated IAB node DU 454 may send a BAP control PDU to the downstream child IAB node MT 462. The BAP control PDU includes updated configuration information. The updated configuration information may include one or more of the following: a new radio (NR) physical cell identity (PCI), an NR cell global identity (CGI), or a public land mobile network (PLMN) identity.

[0091] refer to Fig.13 The present disclosure describes various embodiments of a method 1300 for updating configuration information of a downstream device of a migrated IAB node using a medium access control (MAC) control element (CE) during inter-host migration. In one embodiment, the downstream device may include one or more user equipment (UE) and / or one or more child IAB node mobile terminals (MT). The updated configuration information may include at least one of a new radio (NR) physical cell identity (PCI), an NR cell global identity (CGI), or a public land mobile network (PLMN) identity.

[0092] Method 1300 may include part or all of the following steps: step 1310: the migrated IAB node distributed unit (DU) provides updated configuration information to a media access control (MAC) control element (CE), and step 1320: the migrated IAB node DU sends a MAC CE including the updated configuration information to a downstream device.

[0093] Fig.14 A logic flow of a method 1400 for updating configuration information of downstream devices of a migrating IAB node using MAC CE during inter-host migration is shown.

[0094] refer to Fig.14 In step 1410, the migrated IAB node DU 454 may provide updated configuration information into the MAC CE.

[0095] refer to Fig.14 In step 1420a of the embodiment, the migrated IAB node DU 454 may send a MAC CE including updated configuration information to the downstream UE 470. The updated configuration information may include one or more of the following: a new radio (NR) physical cell identity (PCI), an NR cell global identity (CGI), or a public land mobile network (PLMN) identity.

[0096] refer to Fig.14In step 1420b, the migrated IAB node DU 454 may send a MAC CE including updated configuration information to the downstream child IAB node MT 462. The updated configuration information may include one or more of the following: a new radio (NR) physical cell identity (PCI), an NR cell global identity (CGI), or a public land mobile network (PLMN) identity.

[0097] In one embodiment, step 1420a may be performed earlier than step 1420b. In another embodiment, step 1420a may be performed later than step 1420b.

[0098] The present disclosure describes methods, apparatus, and computer-readable media for wireless communications. The present disclosure solves the problem of updating configuration information of downstream devices of a migrating integrated access backhaul node (IAB node) during inter-host migration. The methods, apparatus, and computer-readable media described in the present disclosure can facilitate the performance of wireless communications by using dedicated RRC messages, or broadcasting system information messages, or using RRCReconfiguration messages, or using BAP control PDUs, or using MAC CEs to update the configuration information of downstream devices of the migrated IAB node during inter-host migration, thereby improving migration efficiency and overall wireless network performance. The methods, apparatus, and computer-readable media described in the present disclosure can improve the overall efficiency of wireless communication systems.

[0099] References to features, advantages, or similar language throughout this specification do not imply that all features and advantages that may be achieved with the present solution should be present or included in any single embodiment thereof. Rather, language referring to features and advantages is understood to mean that a particular feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the present solution. Thus, throughout this specification, discussions of features and advantages and similar language may, but do not necessarily, refer to the same embodiment.

[0100] In addition, in one or more embodiments, the described features, advantages, and characteristics of the present solution may be combined in any suitable manner. One of ordinary skill in the relevant art will recognize, based on the description herein, that the present solution may be practiced without one or more specific features or advantages of a particular embodiment. In other cases, additional features and advantages that may not be present in all embodiments of the present solution may be recognized in certain embodiments.

Claims

1. A method for wireless communication, comprising: During inter-host migration from a source IAB host to a target IAB host, configuration information of downstream devices of the migrated access backhaul integrated node (IAB node) is updated by the following steps: The IAB host centralized unit CU provides the updated configuration information to the system information, the system information is included in the system information block SIB other than the system information block-1 (SIB1) carried in the SystemInformation (SI) message, and encodes the system information with the updated configuration information; as well as The IAB host CU sends the system information including the updated configuration information as a radio resource control RRC container to the migrated IAB node distributed unit DU via the F1-AP, so that the migrated IAB node DU forwards the system information including the updated configuration information to the downstream device through a dedicated RRC message, The updated configuration information includes the new wireless NR physical cell identifier PCI and the NR cell global identity CGI.

2. The method according to claim 1, wherein: The downstream device includes a user equipment UE or a sub-IAB node mobile terminal MT.

3. A method for wireless communication, comprising: During inter-host migration from a source IAB host to a target IAB host, configuration information of downstream devices of the migrated access backhaul integrated node (IAB node) is updated by the following steps: The migrated IAB node distributed unit DU provides updated configuration information to system information, the system information is included in a master information block MIB or a system information block-1 (SIB1), and the system information is encoded with the updated configuration information; as well as The migrated IAB node DU sends the system information contained in the MIB or the SIB1 to the downstream device through a dedicated RRC message, The updated configuration information includes the new wireless NR physical cell identifier PCI and the NR cell global identity CGI.

4. The method according to claim 3, wherein: The downstream device includes a user equipment UE or a sub-IAB node mobile terminal MT.

5. A method for wireless communication, comprising: During inter-host migration from a source IAB host to a target IAB host, configuration information of downstream devices of the migrated access backhaul integrated node (IAB node) is updated by the following steps: The IAB host centralized unit CU provides the updated configuration information to the system information, the system information is included in the system information block SIB other than the system information block-1 (SIB1) carried in the SystemInformation (SI) message, and encodes the system information with the updated configuration information; as well as The IAB host CU sends the system information including the updated configuration information as a radio resource control RRC container to the migrated IAB node distributed unit DU via the F1-AP, so that the migrated IAB node DU periodically broadcasts the SystemInformation (SI) message including the updated configuration information to the downstream device, The updated configuration information includes the new wireless NR physical cell identifier PCI and the NR cell global identity CGI.

6. The method according to claim 5, wherein: The downstream device includes a user equipment UE or a child IAB node MT.

7. A method for wireless communication, comprising: During inter-host migration from a source IAB host to a target IAB host, configuration information of downstream devices of the migrated access backhaul integrated node (IAB node) is updated by the following steps: The migrated IAB node distributed unit DU provides updated configuration information to system information, the system information is included in a master information block MIB or a system information block-1 (SIB1), and the system information is encoded with the updated configuration information; as well as The migrated IAB node DU periodically broadcasts the system information in the MIB or the SIB1 to the downstream device, The updated configuration information includes the new wireless NR physical cell identifier PCI and the NR cell global identity CGI.

8. The method according to claim 7, wherein: The downstream device includes a user equipment UE or a child IAB node MT.

9. A method for wireless communication, comprising: During inter-host migration from a source IAB host to a target IAB host, configuration information of downstream devices of the migrated access backhaul integrated node (IAB node) is updated by the following steps: The migrated IAB node distributed unit DU provides the updated configuration information in the RRCReconfiguration message; as well as The migrated IAB node DU sends the RRCReconfiguration message including the updated configuration information to the downstream device, The updated configuration information includes the new wireless NR physical cell identifier PCI and the NR cell global identity CGI.

10. The method according to claim 9, wherein: The downstream device includes a user equipment UE or a sub-IAB node mobile terminal MT.

11. The method according to claim 9, wherein: The updated configuration information includes a public land mobile network PLMN ID.

12. The method according to claim 9, wherein: The downstream device includes a child IAB node MT; and The updated configuration information includes an Internet Protocol (IP) address.

13. A method for wireless communication, comprising: During inter-host migration from a source IAB host to a target IAB host, configuration information of downstream devices of the migrated access backhaul integrated node (IAB node) is updated by the following steps: The migrated IAB node distributed unit DU provides the updated configuration information into the backhaul adaptation protocol BAP control protocol data unit PDU; as well as The migrated IAB node DU sends the BAP control PDU including the updated configuration information to the downstream device, The updated configuration information includes the new wireless NR physical cell identifier PCI and the NR cell global identity CGI.

14. A method according to claim 13, wherein: The downstream device includes a child IAB node MT.

15. The method of claim 13, wherein: The updated configuration information includes a public land mobile network PLMN ID.

16. A method for wireless communication, comprising: During inter-host migration from a source IAB host to a target IAB host, configuration information of downstream devices of the migrated access backhaul integrated node (IAB node) is updated by the following steps: The migrated IAB node distributed unit DU provides the updated configuration information to the medium access control MAC control element CE, and The migrated IAB node DU sends the MAC CE including the updated configuration information to the downstream device, The updated configuration information includes the new wireless NR physical cell identifier PCI and the NR cell global identity CGI.

17. The method of claim 16, wherein: The downstream device includes a user equipment UE or a child IAB node MT.

18. The method of claim 16, wherein: The updated configuration information includes a public land mobile network PLMN ID.

19. A wireless communication device comprising a processor and a memory, wherein the processor is configured to read a code from the memory and implement the method according to any one of claims 1 to 18.

20. A computer program product comprising computer readable program medium code stored thereon, which, when executed by a processor, causes the processor to implement the method according to any one of claims 1 to 18.

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