Method for mobile integrated access and backhaul

Abstract

A wireless communication method for use in a wireless terminal is disclosed. The method includes receiving at least one configuration parameter for the vehicle-mounted terminal from a wireless network node, identifying as the vehicle-mounted terminal, and performing an operation by using the at least one configuration parameter for the vehicle-mounted terminal.

Description

[0001] This document relates generally to wireless communications and, in particular, to fifth generation (5 th Generation, 5G) communications.

[0002] The demand for improved 5G cellular coverage and connectivity continues to increase, which can be challenging in many outdoor and mobile scenarios. In some outdoor environments, the use of vehicles equipped with mobile base station relays—either following a known / predictable route (e.g., buses, trams, etc.) or located in convenient locations (e.g., outside stadiums, hotspots, or emergency sites)—can provide a very beneficial boost to cellular coverage and capacity when and where needed. These relays, using 5G wireless backhaul to the macro network, can indeed provide improved 5G coverage and connectivity to adjacent user equipment (UEs). Vehicle relays are also clearly well-suited for improving connectivity for users or devices within the vehicle itself in various environments (e.g., for passengers, temporary / professional personnel, or equipment in buses, cars / taxi, or trains). Other target scenarios for vehicle relays include: vehicle relays can be used to reach users or devices that otherwise have no or poor macro coverage. For example, when first responders are dispersed throughout an indoor building / area, 5G relays can be placed on vehicles near or outside them to provide them with the necessary 5G coverage and connectivity.

[0003] The technical advantages of using vehicle relays include, but are not limited to, the ability of base station (BS) relays to achieve better macro coverage than nearby UEs, for example, by leveraging better radio frequency (RF) / antenna and power capabilities. In addition to the value to network operators and end users, it is also possible to find worthwhile incentives for other parties, such as encouraging vehicle manufacturers, vehicle / fleet owners, or suppliers to install and operate relays in their vehicles.

[0004] This document relates to methods, systems, and devices for cell selection / reselection of a mobile network node, and in particular to methods, systems, and devices for cell selection / reselection when a vehicle-mounted UE communicates with a mobile network node.

[0005] The present disclosure relates to a wireless communication method used in a wireless terminal. The method includes:

[0006] receiving at least one configuration parameter for the vehicle-mounted terminal from a wireless network node,

[0007] Identify as a vehicle-mounted terminal, and

[0008] The operation is performed by using at least one configuration parameter for the vehicle-mounted terminal.

[0009] Various embodiments may preferably implement the following features.

[0010] Preferably, the at least one configuration parameter includes at least one cell reselection parameter for the vehicle-mounted terminal.

[0011] Preferably, performing the operation by using at least one configuration parameter for the vehicle-mounted terminal includes performing a cell reselection process by using at least one cell reselection parameter.

[0012] Preferably, the at least one configuration parameter includes a hysteresis value and / or an offset value for a cell reselection process.

[0013] Preferably, performing the cell reselection process by using at least one cell reselection parameter includes:

[0014] determining a serving cell quality metric and / or at least one neighbor cell quality metric by using at least one cell reselection parameter, and

[0015] A cell reselection procedure is performed based on a serving cell quality metric and / or at least one neighbor cell quality metric.

[0016] Preferably, the at least one configuration parameter includes a low mobility relaxed measurement threshold and / or an edging cell relaxed measurement.

[0017] Preferably, performing the operation by using at least one configuration parameter for the vehicle-mounted terminal includes determining whether to perform relaxed measurement based on a low mobility relaxed measurement threshold and / or an edge cell relaxed measurement threshold.

[0018] Preferably, identifying as a vehicle-mounted terminal includes: if it is determined that the cell accessed by the wireless terminal is a mobile Integrated Access and Backhaul (IAB) node, identifying as a vehicle-mounted terminal.

[0019] Preferably, identifying as a vehicle-mounted terminal includes: if it is determined that the relative moving speed between the cell and the wireless terminal is less than a threshold, identifying as a vehicle-mounted terminal.

[0020] Preferably, identifying as a vehicle-mounted terminal includes: if it is determined that a closed access group (CAG) identifier of the cell is in an allowed CAG list, then identifying as a vehicle-mounted terminal, wherein the wireless terminal supports a CAG function.

[0021] Preferably, identifying as a vehicle-mounted terminal includes: if it is determined that at least one tracking area broadcast by a cell where the wireless terminal resides is not in a list of Forbidden Tracking Areas for Roaming, then identifying as a vehicle-mounted terminal, wherein the cell is provided by a mobile integrated access and backhaul node.

[0022] The present disclosure relates to a wireless communication method used in a wireless network node. The method comprises:

[0023] At least one configuration parameter for the vehicle-mounted terminal is transmitted to the wireless terminal.

[0024] Various embodiments may preferably implement the following features.

[0025] Preferably, the at least one configuration parameter includes at least one cell reselection parameter for the vehicle-mounted terminal.

[0026] Preferably, at least one cell reselection parameter is used in the cell reselection procedure.

[0027] Preferably, the at least one configuration parameter comprises a hysteresis value and / or an offset value for the cell reselection procedure.

[0028] Preferably, the at least one configuration parameter includes a low mobility relaxation measurement threshold and / or an edge cell relaxation measurement.

[0029] Preferably, the serving cell quality metric and / or at least one neighbor cell quality metric is used to determine whether to perform relaxation measurements by the wireless terminal.

[0030] The present disclosure relates to a wireless communication method for use in a first wireless network node. The method comprises:

[0031] receiving location information of the wireless terminal from the second radio network node, and

[0032] Transmits location information to access and mobility management functions.

[0033] Various embodiments may preferably implement the following features.

[0034] Preferably, the wireless communication method further comprises: transmitting a request for location information of the wireless terminal to the second wireless network node.

[0035] Preferably, the first radio network node and the second radio network node are integrated access and backhaul donor sites (IAB-donors) for wireless terminals.

[0036] Preferably, the first radio network node is an F1-terminating IAB-donor for the wireless terminal, and the second radio network node is a non-F1-terminating IAB-donor for the wireless terminal.

[0037] The present disclosure relates to a wireless communication method used in a second wireless network node. The method includes: transmitting location information of a wireless terminal to a first wireless network node.

[0038] Various embodiments may preferably implement the following features.

[0039] Preferably, the wireless communication method further comprises: receiving a request for location information of the wireless terminal from the first wireless network node.

[0040] Preferably, the first radio network node and the second radio network node are integrated access and backhaul donor sites for the wireless terminal.

[0041] Preferably, the first radio network node is an F1-terminated integrated access and backhaul donor site for the wireless terminal, and the second radio network node is a non-F1-terminated integrated access and backhaul donor site for the wireless terminal.

[0042] The present disclosure relates to a wireless communication method used in a third wireless network node. The method comprises:

[0043] receiving, from a fourth radio network node, Tracking Area Code (TAC) related information associated with the mobile network node, and

[0044] Perform operations for the mobile network node based on the TAC-related information.

[0045] Various embodiments may preferably implement the following features.

[0046] Preferably, the transport migration process transfers a distributed unit (DU) of a mobile network node from (a path via a source parent node) to (another path via a target parent node) to connect to an F1 terminating IAB donor site.

[0047] Preferably, performing an operation for the mobile network node based on the TAC information includes:

[0048] determining the TAC based on the TAC-related information, and

[0049] The determined TAC is transmitted to the mobile network node.

[0050] Preferably, the determined TAC is not in the supported tracking area list.

[0051] Preferably, the wireless communication method further comprises: transmitting to an access and mobility management function a supported tracking area list updated to include the determined TAC.

[0052] Preferably, the wireless communication method further comprises: triggering complete migration of a mobile terminal (Mobile Termination, MT) of the mobile network node and a distributed unit (Distributed Unit, DU) of the mobile network node.

[0053] Preferably, migration of a distributed unit of a mobile network node is triggered.

[0054] Preferably, during the transport migration process, the determined TAC is transmitted to the mobile network node in F1 signaling.

[0055] Preferably, the third radio network node is an F1-terminated integrated access and backhaul donor site associated with the mobile network node, the fourth radio network node is a non-F1-terminated integrated access and backhaul donor site associated with the mobile network node, and the mobile network node is an integrated access and backhaul node.

[0056] Preferably, the mobile terminal of the mobile network node is transferred from a source donor site to a target donor site, wherein the fourth radio network node is the source donor site or the target donor site.

[0057] The present disclosure relates to a wireless communication method used in a fourth wireless network node. The method comprises:

[0058] Tracking area code (TAC) related information associated with the mobile network node is transmitted to a third radio network node.

[0059] Various embodiments may preferably implement the following features.

[0060] Preferably, the third radio network node is an F1-terminated integrated access and backhaul donor site associated with the mobile network node, the fourth radio network node is a non-F1-terminated integrated access and backhaul donor site associated with the mobile network node, and the mobile network node is an integrated access and backhaul node.

[0061] Preferably, a mobile terminal (Mobile Termination, MT) of the mobile network node moves from a source donor site to a target donor site, wherein the fourth radio network node is the source donor site or the target donor site.

[0062] The present disclosure relates to a wireless communication method for a mobile network node. The method comprises:

[0063] Migrating the mobile terminal of the mobile network node to the fifth radio network node,

[0064] receiving a tracking area code (TAC) allocated for the mobile network node from the fifth radio network node, and

[0065] The TAC is transmitted to a sixth radio network node.

[0066] Various embodiments may preferably implement the following features.

[0067] Preferably, the TAC is received in radio resource control signaling or a system information block from the fifth radio network node.

[0068] Preferably, the wireless communication method further includes:

[0069] receiving an acknowledgement message from the sixth radio network node, and

[0070] TAC information is broadcast in the system information block.

[0071] Preferably, the sixth radio network node is an F1-terminated integrated access and backhaul donor site associated with the mobile network node, the fifth radio network node is a non-F1-terminated integrated access and backhaul donor site associated with the mobile network node, and the mobile network node is an integrated access and backhaul node.

[0072] The present disclosure relates to a wireless communication method used in a fifth wireless network node. The method comprises:

[0073] A tracking area code (TAC) allocated for the mobile network node is transmitted to the mobile network node, wherein a mobile terminal of the mobile network node is migrated to the fifth radio network node.

[0074] Various embodiments may preferably implement the following features.

[0075] Preferably, the TAC is transmitted to the mobile network node in a system information block or a radio resource control.

[0076] Preferably, the sixth radio network node is an F1-terminated integrated access and backhaul donor site associated with the mobile network node, the fifth radio network node is a non-F1-terminated integrated access and backhaul donor site associated with the mobile network node, and the mobile network node is an integrated access and backhaul node.

[0077] The present disclosure relates to a wireless communication method for use in a mobile network node, the method comprising:

[0078] migrating the distributed unit of the mobile network node from the seventh radio network node to the eighth radio network node,

[0079] receiving a new radio cell global identity from the seventh radio network node or the eighth radio network node, and

[0080] The old radio cell global identity is replaced with the new radio cell global identity.

[0081] Various embodiments may preferably implement the following features.

[0082] Preferably, the mobile network node is an integrated access and backhaul node, and the seventh radio network node and the eighth radio network node are F1 terminating integrated access and backhaul donor sites for the mobile network node.

[0083] The present disclosure relates to a wireless communication method for use in a seventh wireless network node. The method comprises:

[0084] receiving a new radio cell global identity of a mobile network node from an eighth radio network node, wherein a distributed unit of the mobile network node migrates from a seventh radio network node to the eighth radio network node, and

[0085] The new radio cell global identity is transmitted to the mobile network node.

[0086] Various embodiments may preferably implement the following features.

[0087] Preferably, the mobile network node is an integrated access and backhaul node, and the seventh radio network node and the eighth radio network node are F1 terminating integrated access and backhaul donor sites for the mobile network node.

[0088] The present disclosure relates to a wireless communication method used in an eighth wireless network node. The method comprises:

[0089] The new radio cell global identifier is transmitted to the mobile network node or the seventh radio network node, wherein the distributed unit of the mobile network node migrates from the seventh radio network node to the eighth radio network node.

[0090] The present disclosure relates to a wireless terminal. The wireless terminal includes:

[0091] a communication unit configured to receive at least one configuration parameter for the vehicle-mounted terminal from a wireless network node, and

[0092] The processor is configured to:

[0093] Identify as a vehicle-mounted terminal, and

[0094] The operation is performed by using at least one configuration parameter for the vehicle-mounted terminal.

[0095] Various embodiments may preferably implement the following features.

[0096] Preferably, the processor is further configured to perform any of the aforementioned wireless communication methods.

[0097] The present disclosure relates to a wireless network node. The wireless network node includes:

[0098] The communication unit is configured to transmit at least one configuration parameter for the vehicle-mounted terminal to the wireless terminal.

[0099] Various embodiments may preferably implement the following features.

[0100] Preferably, the radio network node further comprises a processor configured to execute any of the aforementioned wireless communication methods.

[0101] The present disclosure relates to a first wireless network node. The first wireless network node includes:

[0102] The communication unit is configured to:

[0103] receiving location information of the wireless terminal from the second radio network node, and

[0104] Transmits location information to access and mobility management functions.

[0105] Various embodiments may preferably implement the following features.

[0106] Preferably, the first radio network node further comprises a processor configured to execute any of the aforementioned wireless communication methods.

[0107] The present disclosure relates to a second wireless network node. The second wireless network node includes:

[0108] The communication unit is configured to transmit the location information of the wireless terminal to the first radio network node.

[0109] Various embodiments may preferably implement the following features.

[0110] Preferably, the second radio network node further comprises a processor configured to execute any of the aforementioned wireless communication methods.

[0111] The present disclosure relates to a third wireless network node. The third wireless network node includes:

[0112] a communication unit configured to receive tracking area code (TAC) related information associated with the mobile network node from a fourth radio network node, and

[0113] The processor is configured to perform operations for the mobile network node based on the TAC-related information.

[0114] Various embodiments may preferably implement the following features.

[0115] Preferably, the processor is further configured to perform any of the aforementioned wireless communication methods.

[0116] The present disclosure relates to a fourth wireless network node. The fourth wireless network node includes:

[0117] The communication unit is configured to transmit tracking area code (TAC) related information associated with the mobile network node to a third radio network node.

[0118] Various embodiments may preferably implement the following features.

[0119] Preferably, the fourth radio network node further comprises a processor configured to execute any of the aforementioned wireless communication methods.

[0120] The present disclosure relates to a mobile network node. The mobile network node includes:

[0121] a processor configured to migrate the mobile terminal of the mobile network node to a fifth radio network node, and

[0122] The communication unit is configured to:

[0123] receiving a tracking area code (TAC) allocated for the mobile network node from the fifth radio network node,

[0124] The TAC is transmitted to a sixth radio network node.

[0125] Various embodiments may preferably implement the following features.

[0126] Preferably, the processor is further configured to perform any of the aforementioned wireless communication methods.

[0127] The present disclosure relates to a fifth wireless network node. The fifth wireless network node includes:

[0128] The communication unit is configured to transmit a tracking area code (TAC) allocated for the mobile network node to a mobile network node, wherein a mobile terminal of the mobile network node is migrated to a fifth radio network node.

[0129] Various embodiments may preferably implement the following features.

[0130] Preferably, the fifth radio network node further comprises a processor configured to execute any of the aforementioned wireless communication methods.

[0131] The present disclosure relates to a mobile network node. The mobile network node includes:

[0132] a processor configured to migrate the distributed unit of the mobile network node from the seventh radio network node to the eighth radio network node, and

[0133] a communication unit configured to receive a new radio cell global identifier from the seventh radio network node or the eighth radio network node,

[0134] The processor is further configured to replace the old wireless cell global identifier with the new wireless cell global identifier.

[0135] Various embodiments may preferably implement the following features.

[0136] Preferably, the processor is further configured to perform any of the aforementioned wireless communication methods.

[0137] The present disclosure relates to a seventh wireless network node, including:

[0138] The communication unit is configured to:

[0139] receiving a new radio cell global identity of a mobile network node from an eighth radio network node, wherein a distributed unit of the mobile network node migrates from a seventh radio network node to the eighth radio network node, and

[0140] The new radio cell global identity is transmitted to the mobile network node.

[0141] Various embodiments may preferably implement the following features.

[0142] Preferably, the seventh radio network node further comprises a processor configured to execute any of the aforementioned wireless communication methods.

[0143] The present disclosure relates to an eighth wireless network node. The eighth wireless network node includes:

[0144] The communication node is configured to transmit a new radio cell global identifier to a mobile network node or a seventh radio network node, wherein the distributed unit mobile terminal of the mobile network node migrates from the seventh radio network node to the eighth radio network node.

[0145] The present disclosure relates to a computer program product, comprising a computer-readable program medium code stored thereon, which, when executed by a processor, causes the processor to implement the wireless communication method recited in any one of the aforementioned methods.

[0146] The exemplary embodiments disclosed herein are intended to provide features that will become apparent by reference to the following description when taken in conjunction with the accompanying drawings. According to various embodiments, exemplary systems, methods, devices, and computer program products are disclosed herein. However, it should be understood that these embodiments are presented by way of example and not limitation, and that various modifications may be made to the disclosed embodiments while remaining within the scope of the present disclosure as will be apparent to those skilled in the art reading this disclosure.

[0147] Therefore, the present disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. In addition, the specific order and / or hierarchy of steps in the methods disclosed herein are merely exemplary methods. Based on design preferences, the specific order or hierarchy of steps of the disclosed methods or processes can be rearranged while remaining within the scope of the present disclosure. Therefore, it will be understood by those of ordinary skill in the art that the methods and techniques disclosed herein present various steps or actions in a sample order, and unless expressly stated otherwise, the present disclosure is not limited to the specific order or hierarchy presented.

[0148] The present invention is specified by the independent claims. Preferred embodiments are defined in the dependent claims. In the following description, although many features may be specified as optional, it should be appreciated that not all features included in the independent claims should be considered optional.

[0149] These and other aspects and embodiments thereof are described in more detail in the drawings, the description, and the claims.

[0150] Figure 1 A schematic diagram of a network according to an embodiment of the present disclosure is shown.

[0151] Figure 2 A schematic diagram illustrating a process according to an embodiment of the present disclosure is shown.

[0152] Figure 3 A schematic diagram illustrating a process according to an embodiment of the present disclosure is shown.

[0153] Figure 4 A schematic diagram illustrating a process according to an embodiment of the present disclosure is shown.

[0154] Figure 5 A schematic diagram illustrating a process according to an embodiment of the present disclosure is shown.

[0155] Figure 6 A schematic diagram illustrating a process according to an embodiment of the present disclosure is shown.

[0156] Figure 7 A schematic diagram illustrating a process according to an embodiment of the present disclosure is shown.

[0157] Figure 8 A schematic diagram illustrating a process according to an embodiment of the present disclosure is shown.

[0158] Figure 9 A schematic diagram illustrating a process according to an embodiment of the present disclosure is shown.

[0159] Figure 10 An example of a schematic diagram of a wireless terminal according to an embodiment of the present disclosure is shown.

[0160] Figure 11 An example of a schematic diagram of a wireless network node according to an embodiment of the present disclosure is shown.

[0161] In this disclosure, from the perspective of advanced 5G systems, the target scenario includes a mobile vehicle equipped with a small on-board base station (BS) relay, which provides 5G coverage and communication to UEs (inside and / or near the vehicle) and is wirelessly connected to the 5G network via a Radio Access Network (RAN) (donor site) node.

[0162] Figure 1 Schematic diagram of a network (architecture) according to an embodiment of the present disclosure is shown. Figure 1 In the embodiment, the network includes UE, mobile base station relay and donor RAN (radio access network (node)). In an embodiment, the mobile base station relay is installed on a vehicle.

[0163] In an embodiment, the UE communicates with the donor RAN and / or core network (e.g., 5G Core network (5GC)) via a mobile base station relay.

[0164] In an embodiment, the mobile base station relay is referred to as an Integrated Access and Backhaul (IAB) node.

[0165] In an embodiment, the donor RAN is referred to as an IAB-donor site (IAB-donor).

[0166] Figure 2 A schematic diagram of a process according to an embodiment of the present disclosure is shown. Figure 2In the embodiment, the mobile IAB node broadcasts the cell reselection parameters Qhyst-onboard and / or Qoffset-onboard in the system information. The UE identifies itself as a vehicle-mounted UE through the implementation. The vehicle-mounted UE performs cell reselection based on the cell reselection parameters Qhyst-onboard and / or Qoffset-onboard. For example, the UE can determine Rs and / or Rn of the cell reselection process based on Qhyst-onboard and / or Qoffset-onboard, for example:

[0167] Rs=Qmeas,s+Qhyst-onboard-QoffsetTemp

[0168] Rn=Qmeas,n-Qoffset-onboard-QoffsetTemp

[0169] or

[0170] Rs=Qmeas,s+Qhyst+Qhyst-onboard-QoffsetTemp

[0171] Rn=Qmeas,n-Qoffset-Qoffset-onboard-QoffsetTemp

[0172] In an embodiment, Rs refers to a signal quality metric of a serving cell of a UE (eg, Reference Signal Received Power (RSRP) or Reference Signal Received Quality (RSRQ)).

[0173] In an embodiment, Rn refers to a signal quality metric (eg, RSRP or RSRQ) of a neighboring cell of the UE.

[0174] In an embodiment, Qmeas refers to the (RSRP) measurement quantity used in cell reselection. That is, Qmeas,s refers to the (RSRP) measurement quantity used in cell reselection of the serving cell, and Qmeas,n refers to the (RSRP) measurement quantity used in cell reselection of the neighboring cell.

[0175] In an embodiment, Qoffsettemp refers to an offset temporarily applied to a cell.

[0176] In an embodiment, if it is determined that the cell accessed by the UE is a mobile IAB node, the UE identifies itself as a vehicle-mounted UE. For example, a system information block (SIB) broadcast by the mobile IAB node may include a mobile IAB indication.

[0177] In an embodiment, if it is determined that the relative moving speed between the cell (eg, mobile IAB node) and the wireless terminal is less than a threshold, the UE identifies itself as a vehicular UE.

[0178] In an embodiment of a UE supporting a closed access group (CAG), the UE identifies itself as a vehicular UE if it is determined that the closed access group (CAG) identifier of a cell is in an allowed CAG.

[0179] In an embodiment, if it is determined that at least one tracking area broadcast by the cell in which the wireless terminal resides is not in the roaming prohibited tracking area list, the UE identifies itself as a vehicular UE. In an embodiment, the cell is provided by a mobile IAB node.

[0180] Figure 3 A schematic diagram of a process according to an embodiment of the present disclosure is shown. Figure 3 In this embodiment, the mobile IAB node broadcasts the cell reselection parameter SsearchDeltaP-onboard in the system information. In this embodiment, the UE identifies itself as a vehicle-mounted UE. The vehicle-mounted UE performs relaxation measurement identification by considering SsearchDeltaP-onboard. For example, the UE may determine whether to perform relaxation measurement based on whether the following conditions are met:

[0181] (SrxlevRef-Srxlev) <SSearchDeltaP-onboard,

[0182] in:

[0183] -Srxlev = current Srxlev value of the serving cell (dB);

[0184] -SrxlevRef = the reference Srxlev value of the serving cell (dB), set as follows:

[0185] - after selecting or reselecting a new cell, or

[0186] - If (Srxlev - SrxlevRef) > 0, or

[0187] - If the relaxed measurement criteria for TSearchDeltaP-onboard are not met:

[0188] - The UE sets the value of SrxlevRef to the current Srxlev value of the serving cell.

[0189] Figure 4 A schematic diagram of a process according to an embodiment of the present disclosure is shown. Figure 4 In the system information, the mobile IAB node broadcasts the cell reselection parameters SsearchDeltaP-onboard and SsearchThresholdQ-onboard (if configured).

[0190] In this embodiment, the UE identifies itself as a vehicle-mounted UE. The vehicle-mounted UE performs relaxation measurement identification by considering SsearchDeltaP-onboard and SsearchThresholdQ-onboard (if configured). For example, the UE may determine whether to perform relaxation measurement based on whether the following conditions are met:

[0191] -Srxlev>SSearchThresholdP-onboard, and,

[0192] -Squal>SSearchThresholdQ-onboard, if SSearchThresholdQ-onboard is configured,

[0193] in:

[0194] - Srxlev = the current Srxlev value of the serving cell (dB); and

[0195] - Squal = current Squal value of the serving cell (dB).

[0196] Figure 5 A schematic diagram of a process according to an embodiment of the present disclosure is shown. In the present disclosure, a non-F1 terminating IAB-donor is used for a border IAB node and refers to an IAB donor site that has a Radio Resource Control (RRC) connection with a border node but does not terminate the F1 (interface) of the border node. In addition, an F1 terminating IAB donor site is used for a border node and refers to an IAB donor site that terminates the F1 (interface) of the border IAB node. In an embodiment of partial migration, inter-donor site redundancy or inter-donor site RLF recovery is involved. A border IAB node refers to an IAB node whose RRC interface terminates at an IAB donor site central unit (CU) (i.e., IAB-donor-CU) that is different from the F1 interface.

[0197] Specifically, the F1-terminating IAB donor site sends a UE Location Information (ULI) request to the non-F1-terminating IAB donor site, for example, to obtain the ULI of the mobile IAB node. The non-F1-terminating IAB donor site sends the ULI (of the mobile IAB node) to the F1-terminating IAB donor site. The F1-terminating IAB donor site sends the received ULI to the Access and Mobility Management Function (AMF). After receiving the additional ULI, the AMF determines the UE location by considering the ULI of the IAB-UE, such as registration area management, the presence of the UE in the area of interest, and provides the UE location to other network functions (NF) (e.g., Session Management Function (SMF)) during PDU session establishment.

[0198] In an embodiment, the ULI request may be optional. That is, the non-F1 terminating IAB donor site may transmit the ULI to the F1 terminating IAB donor site without receiving the ULI request.

[0199] Figure 6 A schematic diagram of a process according to an embodiment of the present disclosure is shown. Figure 6 In the embodiment of the present invention, a mobile IAB-MT (i.e., a mobile terminal (MT) of a (mobile) IAB node) handover is performed. For example, a mobile IAB-MT (or mobile IAB node) may be transferred / migrated from a source IAB donor site to a target IAB donor site. In this embodiment, the source / target IAB donor site is a non-F1 terminating IAB donor site of the mobile IAB node.

[0200] A non-F1 terminating IAB donor site (e.g., a source IAB donor site of a mobile IAB node or a target donor site of a mobile IAB node) sends Tracking Area Code (TAC) information to the F1 terminating IAB donor site via an Xn or NG interface. The TAC information may include the TAC of the parent node of the mobile IAB node or the TAC (one or more TACs) of the cell of the donor site of the mobile IAB-MT, or an allowed TAC list, for example, sent to the F1 terminating IAB donor site via an Xn or NG interface.

[0201] Upon / after receiving the TAC information, the non-F1 terminating IAB donor site may perform at least one of the following operations:

[0202] - Deciding to perform transport migration (F1 connection is transferred from the source donor site DU to the target donor site DU) or full migration (both the MT and DU of the mobile IAB node are migrated) based on the TAC information, wherein transport migration can be used to enable the DU to connect / access the F1 termination donor site via different parent nodes (e.g., via the source parent node before transport migration and via the target parent node after transport migration);

[0203] - Select one or more TACs based on the cell ID of the mobile IAB-DU (e.g. if / when the TAC information includes multiple TACs): the F1 terminating donor site needs to update the supported TA list to the AMF if the selected TAC is not in its supported TA list; or

[0204] - Select one or more TACs (e.g., if / when the TAC information includes multiple TACs), and configure the TACs to the mobile IAB node via F1 signaling (e.g., GNB-DU CONFIGURATION UPDATE ACKNOWLEDGE) or RRC Reconfiguration message during transport migration.

[0205] Upon / after receiving a new TAC, the mobile IAB-DU broadcasts the received TAC in its SIB.

[0206] Figure 7 A schematic diagram of a process according to an embodiment of the present disclosure is shown. Figure 7 In the embodiment of the present invention, a mobile IAB-MT (i.e., the MT of a (mobile) IAB node) handover is performed. For example, a mobile IAB-MT (or mobile IAB node) may be transferred / migrated from a source IAB donor site to a target IAB donor site. In this embodiment, the source / target IAB donor site is a non-F1 terminating IAB donor site of the mobile IAB node.

[0207] The non-F1 termination donor site (eg, the target IAB donor site of the IAB-MT) sends one or more TACs to the mobile IAB node.

[0208] Upon / after receiving the TAC from the SIB of the non-F1 terminating donor site or parent node, the mobile IAB node reports the TAC to the F1 terminating donor site via F1 signaling (eg, GNB-DU CONFIGURATION UPDATE).

[0209] In response to the F1 signaling, the F1 termination donor site transmits an acknowledgement to the mobile IAB node. Upon / after receiving the acknowledgement from the F1 termination donor site, the mobile IAB-DU broadcasts the received TAC in its SIB.

[0210] Figure 8 A schematic diagram of a process according to an embodiment of the present disclosure is shown. Figure 8 In the embodiment, the handover of the DU of the mobile IAB is performed. For example, the DU of the mobile IAB can be transferred / migrated from the source IAB donor site to the target IAB donor site. In this embodiment, the target IAB donor site is the F1 termination donor site for the mobile IAB node (i.e., Figure 8 The target F1 terminating donor site configures a new Radio Cell Global Identity (NGCI) to the mobile IAB node, for example, via an F1 Setup Response.

[0211] Upon / after receiving the new NGCI, the mobile IAB node replaces the old NCGI with the new NCGI.

[0212] In an embodiment, the target F1 termination donor site also replaces the old NCGI with the new NCGI of the mobile IAB node.

[0213] Figure 9 A schematic diagram of a process according to an embodiment of the present disclosure is shown. Figure 9 In the embodiment, the handover of the DU of the mobile IAB is performed. For example, the DU of the mobile IAB can be transferred / migrated from the source IAB donor site to the target IAB donor site. In this embodiment, the source / target IAB donor site is the F1 termination donor site for the mobile IAB node (i.e., Figure 9 Source / Destination F1 shown in Figure 1 terminates the donor site).

[0214] The source F1 terminating donor site obtains the new NCGI of the mobile IAB node from the target F1 terminating donor site, eg, via an Xn or NG message. In an embodiment, the source F1 terminating donor site replaces the old NCGI associated with the mobile IAB node with the new NCGI of the mobile IAB node.

[0215] Upon / after receiving the new NCGI, the source F1 terminating donor site configures the new NCGI to the mobile IAB node, eg, via F1 or RRC messages.

[0216] After receiving the new NCGI, the mobile IAB node replaces the old NCGI with the new NCGI.

[0217] Figure 10A schematic diagram of a wireless terminal 100 according to an embodiment of the present disclosure is provided. The wireless terminal 100 may be a user equipment (UE), a mobile phone, a laptop computer, a tablet computer, an e-book, or a portable computer system, and is not limited thereto. The wireless terminal 100 may include a processor 1000, such as a microprocessor or an application specific integrated circuit (ASIC), a storage unit 1010, and a communication unit 1020. The storage unit 1010 may be any data storage device that stores program code 1012 accessed and executed by the processor 1000. Embodiments of the storage unit 1010 include, but are not limited to, a subscriber identity module (SIM), a read-only memory (ROM), a flash memory, a random-access memory (RAM), a hard disk, and an optical data storage device. The communication unit 1020 may be a transceiver, and is used to transmit and receive signals (such as messages or packets) based on the processing results of the processor 1000. In an embodiment, the communication unit 1020 transmits data to the user via a memory card. Figure 10 At least one antenna 1022 is shown for transmitting and receiving signals.

[0218] In an embodiment, the storage unit 1010 and the program code 1012 may be omitted, and the processor 1000 may include the storage unit with the stored program code.

[0219] The processor 1000 may implement any one of the steps of the exemplary embodiments on the wireless terminal 100 , for example, by executing the program code 1012 .

[0220] The communication unit 1020 may be a transceiver. The communication unit 1020 may alternatively or additionally combine a transmitting unit and a receiving unit, which are configured to transmit signals to and receive signals from a wireless network node (eg, a base station), respectively.

[0221] Figure 11A schematic diagram of a radio network node 110 according to an embodiment of the present disclosure is provided. The radio network node 110 may be, but is not limited to, a satellite, a base station (BS), a network entity, a mobility management entity (MME), a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), a radio access network (RAN) node, a next generation RAN (NG-RAN) node, a gNB, an eNB, a gNB central unit (gNB-CU), a gNB distributed unit (gNB-DU), a data network, a core network, or a radio network controller (RNC). In addition, the radio network node 110 may include (execute) at least one network function, such as an Access and Mobility Management Function (AMF), a Session Management Function (SMF), a User Place Function (UPF), a Policy Control Function (PCF), an Application Function (AF), etc. The radio network node 110 may include a processor 1100 such as a microprocessor or an ASIC, a storage unit 1110, and a communication unit 1120. The storage unit 1110 may be any data storage device that stores program code 1112 accessed and executed by the processor 1100. Examples of the storage unit 1110 include, but are not limited to, a SIM, a ROM, a flash memory, a RAM, a hard disk, and an optical data storage device. The communication unit 1120 may be a transceiver and is configured to transmit and receive signals (such as messages or packets) according to the processing results of the processor 1100. In an example, the communication unit 1120 transmits data via a SIM card. Figure 11 At least one antenna 1122 is shown for transmitting and receiving signals.

[0222] In an embodiment, the storage unit 1110 and the program code 1112 may be omitted. The processor 1100 may include a storage unit having stored program code.

[0223] The processor 1100 may implement any steps described in the exemplary embodiments on the radio network node 110 , for example, by executing the program code 1112 .

[0224] The communication unit 1120 may be a transceiver. The communication unit 1120 may alternatively or additionally combine a transmitting unit and a receiving unit, which are configured to transmit and receive signals to and from a wireless terminal (eg, a user equipment or another wireless network node), respectively.

[0225] Although various embodiments of the present disclosure have been described above, it should be understood that they are given by way of example only and not by way of limitation. Similarly, various figures may depict example architectures or configurations, which are provided to enable those of ordinary skill in the art to understand the exemplary features and functions of the present disclosure. However, these personnel will understand that the present disclosure is not limited to the example architectures or configurations shown, but may be implemented using a variety of alternative architectures and configurations. In addition, as will be understood by those of ordinary skill in the art, one or more features of an embodiment may be combined with one or more features of another embodiment described herein. Therefore, the breadth and scope of the present disclosure should not be limited by any of the above-mentioned exemplary embodiments.

[0226] It should also be understood that any reference to an element herein using designations such as "first," "second," etc., does not generally limit the quantity or order of those elements. Rather, these designations may be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some manner.

[0227] In addition, persons of ordinary skill in the art will appreciate that information and signals may be represented using any of a variety of different technologies. For example, references to data, instructions, commands, information, signals, bits, and symbols in the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0228] Those skilled in the art will further understand that any of the various illustrative logical blocks, modules, processors, devices, circuits, methods, and functions described in connection with the aspects disclosed herein may be implemented by electronic hardware (e.g., digital implementation, analog implementation, or a combination of both), firmware, various forms of programs or design code containing instructions (for convenience, referred to herein as "software" or "software module"), or any combination of these technologies.

[0229] To clearly illustrate this interchangeability of hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software, or a combination of these technologies, depends on the specific application and the design constraints imposed on the overall system. A skilled person may implement the described functionality in various ways for each specific application, but such implementation decisions do not cause a departure from the scope of this disclosure. According to various embodiments, processors, devices, components, circuits, structures, machines, modules, etc. may be configured to perform one or more of the functions described herein. As used herein with respect to a particular operation or function, the term "configured to" or "configured for" refers to a processor, device, component, circuit, structure, machine, module, etc. that is physically constructed, programmed, and / or arranged to perform the specified operation or function.

[0230] In addition, those skilled in the art will understand that the various illustrative logic blocks, modules, devices, components, and circuits described herein may be implemented within or executed by an integrated circuit (IC), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device, including a general-purpose processor, or any combination thereof. The logic blocks, modules, and circuits may also include an antenna and / or a transceiver to communicate with various components within a network or within a device. A general-purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors combined with a DSP core, or any other suitable configuration to perform the functions described herein. If implemented in software, the functions may be stored as one or more instructions or codes on a computer-readable medium. Thus, the steps of the methods or algorithms disclosed herein may be implemented as software stored on a computer-readable medium.

[0231] Computer-readable media include computer storage media and communication media, including any medium that enables a computer program or code to be transferred from one place to another. Storage media can be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.

[0232] As used herein, the term "unit" refers to software, firmware, hardware, and any combination of these elements to perform the relevant functions described herein. In addition, for the purpose of discussion, various units are described as discrete units; however, it is obvious to those skilled in the art that two or more units can be combined to form a single unit that performs the relevant functions according to the embodiments of the present disclosure.

[0233] In addition, memory or other storage and communication components may be employed in embodiments of the present disclosure. It will be understood that, for the sake of clarity, the above description has described embodiments of the present disclosure with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without departing from the present disclosure. For example, functions illustrated as being performed by separate processing logic elements or controllers may be performed by the same processing logic element or controller. Therefore, references to specific functional units are merely references to suitable devices for providing the described functionality, rather than indicating a strict logical or physical structure or organization.

[0234] Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the scope of the claims. Therefore, the present disclosure is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as set forth in the following claims.

Claims

1. A wireless communication method used in a wireless terminal, the method comprising: receiving at least one configuration parameter for the vehicle-mounted terminal from a wireless network node, Identify as the vehicle-mounted terminal, and An operation is performed by using the at least one configuration parameter for the vehicle-mounted terminal.

2. The wireless communication method according to claim 1, wherein: The at least one configuration parameter includes at least one cell reselection parameter for the vehicle-mounted terminal, and Wherein, performing the operation by using the at least one configuration parameter for the vehicle-mounted terminal includes: A cell reselection procedure is performed by using the at least one cell reselection parameter.

3. The wireless communication method according to claim 2, wherein: The at least one configuration parameter comprises a hysteresis value and / or an offset value for the cell reselection procedure.

4. The wireless communication method according to claim 2 or 3, wherein: Performing the cell reselection procedure by using the at least one cell reselection parameter includes: determining a serving cell quality metric and / or at least one neighbor cell quality metric by using the at least one cell reselection parameter, and The cell reselection procedure is performed based on the serving cell quality metric and / or the at least one neighbor cell quality metric.

5. The wireless communication method according to any one of claims 1 to 4, wherein: The at least one configuration parameter includes a low mobility relaxation measurement threshold and / or an edge cell relaxation measurement, and Wherein, performing the operation by using the at least one configuration parameter for the vehicle-mounted terminal includes: Whether to perform the relaxed measurement is determined based on the low mobility relaxed measurement threshold and / or the edge cell relaxed measurement threshold.

6. The wireless communication method according to any one of claims 1 to 5, wherein: Identifying the vehicle-mounted terminal includes: If the following conditions occur, it is identified as the vehicle terminal: determining that the cell accessed by the wireless terminal is a mobile integrated access and backhaul node, determining that the relative moving speed between the cell and the wireless terminal is less than a threshold, determining that a closed access group (CAG) identifier of the cell is in an allowed closed access group list, wherein the wireless terminal supports CAG functionality, or It is determined that at least one tracking area broadcast by a cell in which the wireless terminal resides is not in a roaming prohibited tracking area list, wherein the cell is provided by the mobile integrated access and backhaul node.

7. A wireless communication method for use in a wireless network node, the method comprising: At least one configuration parameter for the vehicle-mounted terminal is transmitted to the wireless terminal.

8. The wireless communication method according to claim 7, wherein: The at least one configuration parameter includes at least one cell reselection parameter for the vehicle-mounted terminal, The at least one cell reselection parameter is used in the cell reselection process.

9. The wireless communication method according to claim 8, wherein: The at least one configuration parameter comprises a hysteresis value and / or an offset value for the cell reselection procedure.

10. The wireless communication method according to any one of claims 7 to 9, wherein: The at least one configuration parameter includes a low mobility relaxation measurement threshold and / or an edge cell relaxation measurement, The serving cell quality metric and / or the at least one neighboring cell quality metric are used to determine whether the wireless terminal performs relaxed measurement.

11. A wireless communication method for use in a first wireless network node, the method comprising: receiving location information of the wireless terminal from the second radio network node, and The location information is transmitted to an access and mobility management function.

12. The wireless communication method according to claim 11, further comprising: A request for the location information of the wireless terminal is transmitted to the second radio network node.

13. The wireless communication method according to claim 11 or 12, wherein: The first radio network node and the second radio network node are integrated access and backhaul donor sites for the wireless terminal.

14. The wireless communication method according to any one of claims 11 to 13, wherein: The first radio network node is an F1-terminated integrated access and backhaul donor site for the wireless terminal, and the second radio network node is a non-F1-terminated integrated access and backhaul donor site for the wireless terminal.

15. A wireless communication method for use in a second wireless network node, the method comprising: The location information of the wireless terminal is transmitted to the first radio network node.

16. The wireless communication method according to claim 15, further comprising: A request for the location information of the wireless terminal is received from the first radio network node.

17. The wireless communication method according to claim 15 or 16, wherein: The first radio network node and the second radio network node are integrated access and backhaul donor sites.

18. The wireless communication method according to any one of claims 15 to 17, wherein: The first radio network node is an F1-terminated integrated access and backhaul donor site for the wireless terminal, and the second radio network node for the wireless terminal is a non-F1-terminated integrated access and backhaul donor site.

19. A wireless communication method for use in a third wireless network node, the method comprising: receiving, from a fourth radio network node, tracking area code (TAC) related information associated with the mobile network node, and An operation is performed for the mobile network node based on the TAC-related information.

20. The wireless communication method according to claim 19, wherein: Performing the operation for the mobile network node based on the TAC related information includes: performing a transmission migration process for the mobile network node based on the TAC related information, The transport migration process transfers the distributed unit of the mobile network node from a path via a source parent node to another path via a target parent node to connect to an F1 terminating IAB donor site.

21. The wireless communication method according to claim 19 or 20, wherein: Performing the operation for the mobile network node based on the TAC information includes: determining a TAC based on the TAC-related information, and The determined TAC is transmitted to the mobile network node.

22. The wireless communication method according to claim 21, wherein: The determined TAC is not in the supported tracking area list, The method further comprises one of the following: transmitting to an access and mobility management function said supported tracking area list updated to include said determined TAC, triggering a complete migration of a mobile terminal of the mobile network node and the distributed unit of the mobile network node, or A migration of the distributed unit of the mobile network node is triggered.

23. The wireless communication method according to claim 21 or 22, wherein: During transport migration, the determined TAC is transmitted to the mobile network node in F1 signaling.

24. The wireless communication method according to any one of claims 19 to 23, wherein: The third radio network node is an F1-terminated integrated access and backhaul donor site associated with the mobile network node, the fourth radio network node is a non-F1-terminated integrated access and backhaul donor site associated with the mobile network node, and the mobile network node is an integrated access and backhaul node.

25. The wireless communication method according to any one of claims 19 to 24, wherein: The mobile terminal of the mobile network node moves from a source donor site to a target donor site, The fourth wireless network node is the source donor site or the target donor site.

26. A wireless communication method for use in a fourth wireless network node, the method comprising: The tracking area code (TAC) related information associated with the mobile network node is transmitted to the third radio network node.

27. The wireless communication method according to claim 26, wherein: The third radio network node is an F1-terminated integrated access and backhaul donor site associated with the mobile network node, the fourth radio network node is a non-F1-terminated integrated access and backhaul donor site associated with the mobile network node, and the mobile network node is an integrated access and backhaul node.

28. The wireless communication method according to claim 26 or 27, wherein: The mobile terminal of the mobile network node moves from a source donor site to a target donor site, The fourth wireless network node is the source donor site or the target donor site.

29. A wireless communication method for a mobile network node, the method comprising: Migrating the mobile terminal of the mobile network node to a fifth wireless network node, receiving a tracking area code (TAC) allocated to the mobile network node from the fifth radio network node, and The TAC is transmitted to a sixth radio network node.

30. The wireless communication method according to claim 29, wherein: The TAC is received in radio resource control signaling or a system information block from the fifth radio network node.

31. The wireless communication method according to claim 29 or 30, further comprising: receiving an acknowledgement message from the sixth radio network node, and The TAC information is broadcast in a system information block.

32. The wireless communication method according to any one of claims 29 to 31, wherein: The sixth radio network node is an F1-terminated integrated access and backhaul donor site associated with the mobile network node, the fifth radio network node is a non-F1-terminated integrated access and backhaul donor site associated with the mobile network node, and the mobile network node is an integrated access and backhaul node.

33. A wireless communication method for use in a fifth wireless network node, the method comprising: A tracking area code (TAC) allocated to the mobile network node is transmitted to a mobile network node, wherein a mobile terminal of the mobile network node is migrated to the fifth radio network node.

34. The wireless communication method according to claim 33, wherein: The TAC is transmitted to the mobile network node in a system information block or a radio resource control.

35. The wireless communication method according to claim 33 or 34, wherein: The sixth radio network node is an F1-terminated integrated access and backhaul donor site associated with the mobile network node, the fifth radio network node is a non-F1-terminated integrated access and backhaul donor site associated with the mobile network node, and the mobile network node is an integrated access and backhaul node.

36. A wireless communication method for use in a mobile network node, the method comprising: migrating the distributed unit of the mobile network node from the seventh radio network node to the eighth radio network node, receiving a new radio cell global identity from the seventh radio network node or the eighth radio network node, and The old radio cell global identifier is replaced with the new radio cell global identifier.

37. The wireless communication method according to claim 36, wherein: The mobile network node is an integrated access and backhaul node, and the seventh radio network node and the eighth radio network node are F1 terminating integrated access and backhaul donor sites for the mobile network node.

38. A wireless communication method for use in a seventh wireless network node, the method comprising: receiving a new radio cell global identity of a mobile network node from an eighth radio network node, wherein a distributed unit of the mobile network node migrates from the seventh radio network node to the eighth radio network node, and The new radio cell global identity is transmitted to the mobile network node.

39. The wireless communication method according to claim 38, wherein: The mobile network node is an integrated access and backhaul node, and the seventh radio network node and the eighth radio network node are F1 terminating integrated access and backhaul donor sites for the mobile network node.

40. A wireless communication method for use in an eighth wireless network node, the method comprising: The new radio cell global identifier is transmitted to a mobile network node or a seventh radio network node, wherein the distributed unit of the mobile network node is migrated from the seventh radio network node to the eighth radio network node.

41. A wireless terminal comprising: a communication unit configured to receive at least one configuration parameter for the vehicle-mounted terminal from a wireless network node, and The processor is configured to: Identify as the vehicle-mounted terminal, and An operation is performed by using the at least one configuration parameter for the vehicle-mounted terminal.

42. The wireless terminal according to claim 41, wherein The processor is further configured to perform the wireless communication method of any one of claims 2 to 6.

43. A wireless network node, comprising: The communication unit is configured to transmit at least one configuration parameter for the vehicle-mounted terminal to the wireless terminal.

44. The radio network node according to claim 43, further comprising a processor, wherein the processor is configured to execute the wireless communication method according to any one of claims 8 to 10.

45. A first wireless network node, comprising: The communication unit is configured to: receiving location information of the wireless terminal from the second radio network node, and The location information is transmitted to an access and mobility management function.

46. The first radio network node according to claim 45, further comprising a processor, wherein the processor is configured to perform the wireless communication method according to any one of claims 12 to 14.

47. A second wireless network node, comprising: The communication unit is configured to transmit the location information of the wireless terminal to the first radio network node.

48. The second radio network node according to claim 47, further comprising a processor, wherein the processor is configured to perform the wireless communication method according to any one of claims 16 to 18.

49. A third wireless network node, comprising: a communication unit configured to receive tracking area code (TAC) related information associated with the mobile network node from a fourth radio network node, and A processor is configured to perform an operation for the mobile network node based on the TAC-related information.

50. The third radio network node according to claim 49, wherein: The processor is further configured to perform the wireless communication method according to any one of claims 20 to 25.

51. A fourth wireless network node, comprising: The communication unit is configured to transmit tracking area code (TAC) related information associated with the mobile network node to a third radio network node.

52. The fourth radio network node according to claim 51, further comprising a processor, wherein the processor is configured to execute the wireless communication method according to claim 27 or 28.

53. A mobile network node, comprising: a processor configured to migrate the mobile terminal of the mobile network node to a fifth radio network node, and The communication unit is configured to: receiving a tracking area code TAC allocated to the mobile network node from the fifth radio network node, The TAC is transmitted to a sixth radio network node.

54. The mobile network node of claim 53, wherein: The processor is further configured to perform the wireless communication method according to any one of claims 30 to 32.

55. A fifth wireless network node, comprising: The communication unit is configured to transmit a tracking area code (TAC) allocated to a mobile network node to a mobile network node, wherein a mobile terminal of the mobile network node is migrated to the fifth radio network node.

56. The fifth radio network node according to claim 55, further comprising a processor, wherein the processor is configured to execute the wireless communication method according to claim 34 or 35.

57. A mobile network node, comprising: a processor configured to migrate the distributed unit of the mobile network node from the seventh radio network node to the eighth radio network node, and a communication unit configured to receive a new radio cell global identifier from the seventh radio network node or the eighth radio network node, The processor is further configured to replace the old wireless cell global identifier with the new wireless cell global identifier.

58. The mobile network node of claim 57, wherein: The processor is further configured to perform the wireless communication method of claim 37.

59. A seventh wireless network node, comprising: The communication unit is configured to: receiving a new radio cell global identity of a mobile network node from an eighth radio network node, wherein a distributed unit of the mobile network node migrates from the seventh radio network node to the eighth radio network node, and The new radio cell global identity is transmitted to the mobile network node.

60. The seventh radio network node according to claim 59, further comprising a processor, wherein the processor is configured to perform the wireless communication method according to claim 39.

61. An eighth wireless network node, comprising: The communication node is configured to transmit a new radio cell global identifier to a mobile network node or a seventh radio network node, wherein a distributed unit of the mobile network node migrates from the seventh radio network node to the eighth radio network node.

62. A computer program product comprising computer-readable program medium code stored thereon, which, when executed by a processor, causes the processor to implement the wireless communication method according to any one of claims 1 to 40.

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