Access and return integrated node migration method and device

Abstract

A method of wireless communication is described. A method of wireless communication includes transmitting an integrated access and backhaul (IAB) node mobility state information from an IAB node to an IAB host.

Description

Technical Field

[0001] This patent document relates generally to wireless communications. Background Art

[0002] Wireless communication technologies are driving the world towards an increasingly connected and networked society. The rapid development of wireless communications and technological advances have led to greater demands for capacity and connectivity. Other aspects such as energy consumption, equipment cost, spectrum efficiency, and latency are also important to meet the needs of various communication scenarios. Compared with existing wireless networks, next-generation systems and wireless communication technologies need to support more users and devices, as well as an increasingly mobile society. Summary of the invention

[0003] Various techniques that can be implemented by embodiments in mobile communication technologies are disclosed, including fifth generation (5G), new radio (NR), fourth generation (4G) and long term evolution (LTE) communication systems regarding migration of integrated access and backhaul (IAB) nodes.

[0004] In one example aspect, a wireless communication method is disclosed. The method includes sending, from an integrated access and backhaul (IAB) node to an IAB donor, IAB node mobility state information.

[0005] In another example aspect, another wireless communication method is disclosed. The method includes sending wireless device mobility state information from a wireless device to an Integrated Access and Backhaul (IAB) entity.

[0006] In another example aspect, another wireless communication method is disclosed. The method includes: sending migration-related configuration information from an integrated access and backhaul (IAB) host to an IAB mobile node; and wherein the migration-related configuration information includes at least one of the following: a DU migration indication; an F1 establishment indication, a conditional configuration indication for IAB-mobile terminal (MT) migration (IAB-MT migration), an IAB-MT migration suppression indication, an IP address information assigned by a source IAB host, an IP address information assigned by a target IAB host, or a topology indication.

[0007] In another example aspect, another wireless communication method is disclosed. The method includes: receiving, by an integrated access and backhaul (IAB) node from an IAB host, cell reselection configuration information; and wherein the cell reselection configuration information includes at least one of the following: a speed-dependent scaling parameter based on a relative speed, a speed-dependent scaling mechanism enabling indication, or a speed-dependent scaling mechanism disabling indication.

[0008] In another example aspect, another wireless communication method is disclosed. The method includes: receiving, by a wireless device, cell reselection configuration information from an integrated access and backhaul (IAB) entity; and wherein the cell reselection configuration information includes at least one of the following: a speed-dependent scaling parameter based on a relative speed, a speed-dependent scaling mechanism enabling indication, or a speed-dependent scaling mechanism disabling indication.

[0009] In another example aspect, another wireless communication method is disclosed. The method includes: sending, by an integrated access and backhaul (IAB) node, IAB node mobility state information; and wherein the mobility state information includes at least one of the following: speed information, direction information, an indication of a served vehicle wireless device, an indication of a served surrounding wireless device, location information, a speed-related scaling parameter based on a relative speed, or a threshold value of the speed of the IAB node.

[0010] In another example aspect, another wireless communication method is disclosed. The method includes: receiving, by an integrated access and backhaul (IAB) host, IAB node mobility state information from an IAB node; and communicating with the IAB node according to the IAB node mobility state information.

[0011] In another example aspect, another wireless communication method is disclosed. The method includes: receiving, by an integrated access and backhaul (IAB) entity, wireless device mobility state information from a wireless device; and communicating with the wireless device based on the wireless device mobility state information.

[0012] In another example aspect, another wireless communication method is disclosed. The method includes: sending migration-related configuration information from an integrated access and backhaul (IAB) host to an IAB mobile node; and wherein the migration-related configuration information includes at least one of the following: a DU migration indication, an F1 establishment indication, a conditional configuration indication for IAB-mobile terminal (MT) migration (IAB-MT migration), an IAB-MT migration suppression indication, IP address information allocated by a source IAB host, IP address information allocated by a target IAB host, or a topology indication.

[0013] In another example aspect, another wireless communication method is disclosed. The method includes: sending cell reselection configuration information from an integrated access and backhaul (IAB) host to an IAB node; and wherein the cell reselection configuration information includes at least one of the following: a speed-dependent scaling parameter based on relative speed, a speed-dependent scaling mechanism enabling indication, or a speed-dependent scaling mechanism disabling indication.

[0014] In another example aspect, another wireless communication method is disclosed. The method includes: sending cell reselection configuration information from an integrated access and backhaul (IAB) entity to a wireless device; and wherein the cell reselection configuration information includes at least one of the following: a speed-dependent scaling parameter based on relative speed, a speed-dependent scaling mechanism enabling indication, or a speed-dependent scaling mechanism disabling indication.

[0015] In another example aspect, another wireless communication method is disclosed. The method includes: receiving integrated access and backhaul (IAB) node mobility state information from an IAB node; and wherein the mobility state information includes at least one of the following: speed information, direction information, an indication of a served vehicle wireless device, an indication of a served surrounding wireless device, location information, a speed-related scaling parameter based on a relative speed, or a threshold value of a speed of the IAB node.

[0016] In yet another exemplary aspect, the method described above is embodied in the form of a computer-readable medium storing processor-executable code for implementing the method.

[0017] In yet another exemplary embodiment, a device configured or operable to perform the method described above is disclosed. The device includes a processor configured to implement the method.

[0018] 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

[0019] Figure 1 An example of a wireless communication system including a base station (BS) and a user equipment (UE) is shown.

[0020] Figure 2 An example block diagram of a wireless communication system is shown.

[0021] Figure 3 An example of a mobile IAB scenario is shown.

[0022] Figure 4 An example of an IAB architecture is shown.

[0023] Figure 5 An example of a parent node and child node relationship for an IAB-node is shown.

[0024] Figure 6 Example showing migration between hosts

[0025] Figure 7 is a flow chart illustrating an example method.

[0026] Figure 8is a flow chart illustrating an example method.

[0027] Fig. 9 is a flow chart illustrating an example method.

[0028] Fig.10 is a flow chart illustrating an example method.

[0029] Fig.11 is a flow chart illustrating an example method.

[0030] Fig.12 is a flow chart illustrating an example method.

[0031] Fig.13 is a flow chart illustrating an example method.

[0032] Fig.14 is a flow chart illustrating an example method.

[0033] Fig.15 is a flow chart illustrating an example method.

[0034] Fig.16 is a flow chart illustrating an example method.

[0035] Fig.17 is a flow chart illustrating an example method.

[0036] Fig.18 is a flow chart illustrating an example method. DETAILED DESCRIPTION

[0037] The section headings used in this document are intended only to improve readability and are not intended to limit the scope of the embodiments and techniques disclosed in each section to that section. Certain features are described using the example of a fifth generation (5G) wireless protocol. However, the applicability of the disclosed techniques is not limited to 5G wireless systems.

[0038] Integrated Access and Backhaul (IAB) supports wireless backhaul via the New Radio (NR), enabling flexible and very dense deployment of NR cells while reducing the need for wired transmission infrastructure. The intra-host CU migration process has been studied and specified in R16 IAB, where both the source parent node and the target parent node are served by the same IAB-host-CU. And in R17 IAB, inter-host CU migration is discussed, where the migrated IAB node is static. However, there is no solution for inter-host migration in the mobile IAB use case. In the mobile IAB use case, the IAB node is installed in a vehicle and can provide 5G coverage / capacity enhancement to the vehicle and / or surrounding UEs.

[0039] Figure 1An example of a wireless communication system (e.g., Long Term Evolution (LTE), 5G, or NR cellular network) including a BS 120 and one or more user equipments (UEs) 111, 112, and 113 is shown. In some embodiments, uplink transmissions (131, 132, 133) may include uplink control information (UCI), high-layer signaling (e.g., UE assistance information or UE capabilities), or uplink information. In some embodiments, downlink transmissions (141, 142, 143) may include DCI or high-layer signaling or downlink information. For example, the UE may be a smartphone, a tablet, a mobile computer, a machine-to-machine (M2M) device, a terminal, a mobile device, an Internet of Things device (IoT), and the like.

[0040] Figure 2 is a block diagram representation of a portion of an apparatus according to some embodiments of the technology disclosed herein. An apparatus 205, such as a network device or base station or wireless device (or UE), may include a processor electronic device 210, such as a microprocessor that implements one or more of the technologies presented in this document. The apparatus 205 may include a transceiver electronic device 215 for sending and / or receiving wireless signals through one or more communication interfaces (such as antenna 220). The apparatus 205 may include other communication interfaces for sending and receiving data. The apparatus 205 may include one or more memories (not explicitly shown) configured to store information such as data and / or instructions. In some embodiments, the processor electronic device 210 may include at least a portion of the transceiver electronic device 215. In some embodiments, at least some of the disclosed technologies, modules, or functions are implemented using the apparatus 205.

[0041] 3GPP Technical Specification 38.300 discusses mobile IAB scenarios, such as Figure 3 shown.

[0042] IAB supports wireless relay in the Next Generation Radio Access Network (NG-RAN). Relay nodes, called IAB-nodes, support access and backhaul via NR. The terminating node for NR backhaul on the network side is called IAB-host, which represents a gNB with additional functionality to support IAB. Backhaul can occur via single hop or multi-hop.

[0043] The IAB-Node supports the gNB-DU (Distributed Unit) functionality as defined in TS 38.401 to terminate the NR access interface of the UE (Wireless Device) and the next-hop IAB Node, and terminates the F1 protocol of the gNB-CU (Centralized Unit) functionality as defined in TS 38.401 on the IAB Host. The gNB-DU functionality on the IAB-Node is also referred to as IAB-DU.

[0044] In addition to the gNB-DU functionality, the IAB-Node also supports a subset of UE functionality called IAB-MT (which includes, for example, physical layer, layer 2, RRC, and NAS functions) for connecting to a gNB-DU of another IAB-Node or IAB-Host, to a gNB-CU of an IAB-Host, and to the core network.

[0045] The IAB-node can access the network using SA-mode (Standalone Architecture) or EN-DC (E-UTRA-NR Dual Connectivity). Under EN-DC, the IAB-node is also connected to the MeNB via E-UTRA, and the IAB-host terminates X2-C as an SgNB (see TS 37.340).

[0046] Figure 4 IAB architecture is shown; a) IAB node using SA mode with NGC; b) IAB node using EN-DC.

[0047] Figure 5 The parent and child node relationships for the IAB-nodes are shown.

[0048] All IAB-nodes connected to the IAB-host via one or more hops form a directed acyclic graph (DAG) topology with the IAB-host as the root. In this DAG topology, the neighbor nodes on the IAB-DU interface are called child nodes, and the neighbor nodes on the IAB-MT interface are called parent nodes. The direction toward the child node is further called downstream, and the direction toward the parent node is called upstream. The IAB host performs centralized resource, topology and routing management for the IAB topology.

[0049] Technical Glossary

[0050] IAB-Host: The gNB that provides network access to the UE via the backhaul and access link network.

[0051] IAB-Host-CU: gNB-CU of the IAB-Host, terminating the F1 interface towards the IAB-Node and IAB-Host-DU.

[0052] IAB-Host-DU: The IAB-hosted gNB-DU, hosting the IAB BAP sublayer (as defined in TS 38.340), provides wireless backhaul to the IAB nodes.

[0053] IAB-DU: gNB-DU functionality supported by the IAB-node to terminate the NR access interface between the UE and the next-hop IAB node and terminate the F1 protocol of the gNB CU functionality as defined in TS 38.401 on the IAB host.

[0054] IAB-MT: IAB-Node function that terminates the Uu interface to the parent node using the procedures and behaviors specified for the UE, unless otherwise specified. The IAB-MT function used in the 38 series of 3GPP specifications corresponds to the IAB-UE function defined in TS 23.501.

[0055] IAB-Node: A RAN node that supports NR access links to UEs and NR backhaul links to parent and child nodes. The IAB-Node does not support backhaul via LTE.

[0056] Child node: The next-hop neighbor node of the IAB-DU and IAB-host-DU; the child node is also an IAB-node.

[0057] Parent node: the next-hop neighbor node of the IAB-MT; the parent node can be an IAB-node or an IAB-host-DU.

[0058] Upstream: The direction toward the parent node in the IAB topology.

[0059] Downstream: The direction towards child nodes or UEs in the IAB topology.

[0060] Embodiment 1: For a UE in RRC_CONNECTED state

[0061] Problem: In a mobile IAB scenario, the IAB host is not aware of the mobility status of the IAB node and the UE. In this scenario, the IAB host cannot correctly perform handover decisions for the UE. For example, if the UE is moving with the IAB node, the IAB host may initiate a UE handover as the IAB node migrates.

[0062] Solution: The IAB node sends mobility status information to the IAB host, where the mobility status information includes at least one of the following: speed information, direction information, an indication of the vehicle UE being served, an indication of the surrounding UE being served, location information; the relative speed between the UE and the mobile IAB node, or an indication of the mobility status of the UE.

[0063] The mobility state indication of the UE includes at least one of the following: in a vehicle, outside a vehicle, entering a vehicle, or leaving a vehicle.

[0064] The UE sends mobility state information to the IAB node, where the mobility state information includes at least one of the following items: speed information, direction information, or location information.

[0065] The UE sends mobility state information to the IAB host, where the mobility state information includes at least one of the following items: speed information, direction information, or location information.

[0066] Optionally, the mobility status report at the UE / IAB node can be enabled / disabled by the IAB node or the IAB host. In this solution, the UE receives the mobility status report configuration information from the IAB node or the IAB host. Or the IAB node receives the mobility status report configuration information from the IAB host. The mobility status report configuration information can be delivered via RRC dedicated signaling or system information or MAC CE. The mobility status report configuration information includes a mobility status report enabling indication or a mobility status report disabling indication.

[0067] For example, when the mobile IAB node is moving at high speed, the mobility status reporting at the UE may be disabled. When the mobile IAB node is stopped, the mobility status reporting at the UE may be enabled.

[0068] If mobility status reporting at the UE is enabled and the link quality of the serving cell is lower than the configured s-measure value, the UE sends a measurement report to the IAB-Host, which includes speed information / direction information.

[0069] The UE sends a mobility status report to the mobile IAB node (eg, via MAC CE), and then the mobile IAB node sends the mobility status report to the IAB host. The mobility status report from the IAD node may include information of multiple UEs.

[0070] Embodiment 2: For IAB-node / UE in RRC_CONNECTED state

[0071] Problem: During IAB node migration, the target IAB host or target parent IAB node cannot perform admission control correctly because it is not aware of the mobility status of the UE or IAB node.

[0072] Solution: The target IAB host or target parent IAB node performs admission control based on the mobility status of the UE or IAB node.

[0073] Step 1: The source IAB-host-CU sends mobility status information to the target host-CU.

[0074] Step 2: The target host-CU sends the mobility status information to the target parent IAB node / target host-DU.

[0075] The mobility status information includes at least one of the following: speed information, direction information, an indication of a served vehicle UE, an indication of a served surrounding UE, location information, a relative speed between the UE and the mobile IAB node, or an indication of a mobility status of the UE.

[0076] The mobility state indication of the UE includes at least one of the following: in a vehicle, outside a vehicle, entering a vehicle, or leaving a vehicle.

[0077] Embodiment 3: For a UE in the RRC_CONNECTED state

[0078] Scenario: In inter-host migration, if UE migration is performed before mobile terminal (MT) migration, DU / UE migration needs to be performed via the source path before MT migration is performed based on an instruction from the CU.

[0079] Step 1: The IAB-MT receives an RRR Creconfiguration message from the source IAB host, which includes at least one of the following: a DU migration indication, an F1 establishment indication, a conditional configuration indication for IAB-MT migration, cell information (e.g., a physical cell ID (PCI) or an NR cell global identifier (NCGI)), CU IP address information, a BAP address of an IAB node, a default BAP configuration, IP address information allocated by the source IAB host (e.g., IPv4 address, IPv6 address, IP address prefix, IP address usage), IP address information allocated by the target IAB host (e.g., IPv4 address, IPv6 address, IP address prefix, IP address usage), or a topology indication (e.g., a source topology indication, a target topology indication, an F1-terminated topology indication, a non-F1-terminated topology indication).

[0080] Step 2: The IAB node performs F1 establishment with the target IAB host. Optionally, after the IAB node establishes the F1 connection with the target IAB host, UE handover is performed.

[0081] Step 3a: The source host CU sends an MT relocation indication to the IAB node, for example, after all UEs have been relocated. The source host CU may send an MT relocation indication to the IAB node via an RRC or F1 message.

[0082] Step 3b: Alternatively, the target host CU sends an MT migration indication to the IAB node, for example, after all UEs have been migrated. The target host CU may send the MT migration indication to the IAB node via an F1 message.

[0083] Step 4: The IAB node applies the configuration received via the RRCreconfiguration message in step 1 and performs a random access towards the target parent node / target host DU.

[0084] Embodiment 4: For a UE in the RRC_CONNECTED state

[0085] Scenario: In inter-host migration, if UE migration is performed before MT migration, DU / UE migration needs to be performed via the source path before MT migration. In this scenario, F1 traffic between IAB-DU and target IAB host needs to be transmitted via the source path through the source host DU, e.g. Figure 6 As shown by the green line in .

[0086] Figure 6 An inter-host migration - DU / UE migration - is shown being performed before MT migration.

[0087] Problem: How to transmit DL traffic from host CU 2 via host DU1.

[0088] Solution: Information needs to be exchanged between host CU1 and host CU2 to implement DL mapping configuration at host DU1.

[0089] Step 1: The source host CU sends traffic information to the target CU, where the traffic information includes at least one of the following: Quality of Service (QoS) information of UP / non-UP traffic, DSCP (Differentiated Services Code Point) or flow label.

[0090] Step 2: The target CU sends information for DL ​​mapping to the source CU, where the information for DL ​​mapping includes at least one of the following: the IP address of the IAB node, for example, after receiving the IP address from the IAB node via the F1 message, DSCP (Differential Service Code Point), if the DSCP information is not included in step 1, then the information is included in step 2, or if the flow label is not included in step 1, then the flow label information is included in step 2.

[0091] Step 3: The source CU configures DL mapping at the source host DU according to the information received from the target host CU.

[0092] Example 5 - For UE in RRC_IDLE / INACTIVE

[0093] Problem: Conventional speed-dependent scaling mechanisms for cell reselection are not applicable to mobile IAB scenarios (eg, when the UE is in a vehicle that is moving with a mobile IAB node).

[0094] Solution 1: The UE performs cell reselection based on the CU configuration, for example, when the mobile IAB node is moving, the CU may disable speed-dependent scaling for cell reselection.

[0095] Step 1: The IAB node sends mobility status information to the IAB host; the mobility status information includes at least one of the following: speed information, direction information, an indication of the vehicle UE being served, an indication of the surrounding UE being served, location information; the relative speed between the UE and the mobile IAB node, or the mobility status indication of the UE.

[0096] The mobility state indication of the UE includes at least one of the following: in a vehicle, outside a vehicle, entering a vehicle, or leaving a vehicle.

[0097] Step 2: The IAB host sends cell reselection related configuration information to the IAB node or the UE. The cell reselection related configuration information includes at least one of the following items: a speed-related scaling parameter based on relative speed (e.g., for Q hyst The scaling factor and / or for T reselection a scaling factor of the speed-dependent scaling mechanism), a speed-dependent scaling mechanism enable indication, or a speed-dependent scaling mechanism disable indication.

[0098] Step 3: The IAB node or UE performs cell reselection based on the cell reselection related configuration information.

[0099] Solution 2: The UE performs cell reselection based on the relative speed or the speed of the mobile IAB node.

[0100] Step 1: The mobile IAB node broadcasts its mobility status information, which includes at least one of the following: speed information, direction information, an indication of the vehicle UE being served, an indication of the surrounding UE being served, location information; speed-related parameters based on relative speed (e.g., for Q hyst The scaling factor and / or for T reselection The UE may configure a scaling factor for the UE or a threshold value for the speed of the mobile IAB node (eg, when the speed of the mobile IAB node is greater than the configured threshold, the UE disables the speed-dependent scaling mechanism (which is based on the UE mobility state)).

[0101] Step 2: The UE performs cell reselection based on the relative speed between the UE and the IAB node, or based on the mobility state of the mobile IAB node.

[0102] For example, when the speed of the mobile IAB node is greater than 0, the UE disables the speed-related scaling mechanism (which is based on the UE mobility state), when the speed of the mobile IAB node is greater than a configured threshold, the UE disables the speed-related scaling mechanism (which is based on the UE mobility state), and the UE uses a speed-related scaling parameter based on the relative speed to perform cell reselection, or when the speed of the mobile IAB node is equal to zero, the UE performs cell reselection based on the speed-related scaling mechanism, which is based on the absolute speed of the UE.

[0103] Therefore, some preferred embodiments may use the following solutions.

[0104] 1. A method for wireless communication (e.g. Figure 7 ), including: sending IAB node mobility state information from an integrated access and backhaul (IAB) node to an IAB host (702). Additional details and examples are discussed with respect to embodiment 1X.

[0105] 2. The method according to solution 1 further includes: before sending the IAB node mobility status information, the IAB host receives mobility status report configuration information.

[0106] 3. The method according to solution 1, wherein the IAB node mobility status information includes at least one of the following: speed information, direction information, location information, an indication of a served vehicle wireless device, an indication of a served surrounding wireless device, a relative speed between the wireless device and the IAB node, or a mobility status indication.

[0107] 4. The method of solution 3, wherein the mobility state indication comprises at least one of: in a vehicle, outside a vehicle, entering a vehicle, or leaving a vehicle.

[0108] 5. A method of wireless communication (e.g. Figure 8 The method 800 depicted in ), includes: sending wireless device mobility state information from the wireless device to an integrated access and backhaul (IAB) entity (802). Additional details and examples are discussed with respect to embodiment 1.

[0109] 6. The method according to solution 5 further includes: before sending the wireless device mobility status information, the wireless device receives mobility status report configuration information.

[0110] 7. A method according to solution 6, wherein the mobility state information of the wireless device includes at least one of the following: speed information, direction information, or location information, a relative speed between the wireless device and the IAB node, or a mobility state indication; wherein the mobility state indication includes at least one of the following: inside a vehicle, outside a vehicle, entering a vehicle, or leaving a vehicle.

[0111] 8. The method according to solution 5, wherein the IAB entity comprises an IAB node or an IAB host.

[0112] 9. The method according to any one of solutions 2 or 6, wherein the mobility status report configuration information includes enabling or disabling mobility status reporting.

[0113] 10. A method according to any one of solutions 1, 5 or 8, wherein the IAB host further includes a first IAB host centralized unit (CU) and a second IAB host CU; the IAB node mobility status information or the wireless device mobility status information is sent from the first IAB host CU to the second IAB host CU; and wherein the IAB node mobility status information or the wireless device mobility status information includes at least one of the following: speed information, direction information, location information, an indication of a vehicle-mounted wireless device being served, an indication of a surrounding wireless device being served, a relative speed between a wireless device and an IAB node, or a mobility status indication.

[0114] 11. The method according to solution 10 further includes: sending the mobility state information from the second IAB host CU to an IAB node or a host distributed unit (DU).

[0115] 12. The method according to solution 10, wherein the first IAB host CU sends at least one of the following to the second IAB host CU: quality of service (QoS) information, differentiated services code point (DSCP); flow label, or IP address of IAB node.

[0116] 13. The method according to solution 12 further includes: receiving, by the first IAB host CU, downlink mapping information from the second IAB host CU; and wherein the downlink mapping information includes at least one of the following: IP address information, DSCP or flow label of the IAB node.

[0117] 14. A method of wireless communication (e.g. Fig. 9), comprising: sending migration-related configuration information from an integrated access and backhaul (IAB) host to an IAB mobile node (902); and wherein the migration-related configuration information comprises at least one of the following: a DU migration indication, an F1 establishment indication, a conditional configuration indication for IAB-mobile terminal (MT) migration (IAB-MT migration), an IAB-MT migration suppression indication, IP address information allocated by a source IAB host, IP address information allocated by a target IAB host, or a topology indication (904). Additional details and examples are discussed with respect to Embodiment 3.

[0118] 15. A method of wireless communication (e.g. Fig.10 ), comprising: receiving, by an integrated access and backhaul (IAB) node, cell reselection configuration information from an IAB host (1002); and wherein the cell reselection configuration information comprises at least one of the following: a speed-dependent scaling parameter based on relative speed, a speed-dependent scaling mechanism enabling indication, or a speed-dependent scaling mechanism disabling indication (1004). Additional details and examples are discussed with respect to Embodiment 5.

[0119] 16. A method of wireless communication (e.g. Fig.11 ), comprising: receiving, by a wireless device, cell reselection configuration information from an integrated access and backhaul (IAB) entity (1102); and wherein the cell reselection configuration information comprises at least one of the following: a speed-dependent scaling parameter based on relative speed, a speed-dependent scaling mechanism enabling indication, or a speed-dependent scaling mechanism disabling indication (1104). Additional details and examples are discussed with respect to embodiment 5.

[0120] 17. A method of wireless communication (e.g. Fig.12 ), including: sending IAB node mobility state information by the access and backhaul integrated node (1202); and wherein the mobility state information includes at least one of the following: speed information, direction information, an indication of a vehicle-mounted wireless device being served, an indication of a surrounding wireless device being served, location information, a speed-related scaling parameter based on a relative speed, or a threshold value of the speed of the IAB node (1204). Additional details and examples are discussed with respect to Embodiment 5.

[0121] 18. A method of wireless communication (e.g. Fig.13The method 1300 depicted in ), includes: receiving, by an integrated access and backhaul (IAB) host, IAB node mobility state information from an IAB node (1302); and communicating with the IAB node according to the IAB node mobility state information (1304). Additional details and examples are discussed with respect to embodiment 1.

[0122] 19. The method according to solution 18 further includes: before sending the IAB node mobility status information, sending mobility status report configuration information from the IAB host.

[0123] 20. The method according to solution 18, wherein the IAB node mobility status information includes at least one of the following: speed information, direction information, location information, an indication of a served vehicle wireless device, an indication of a served surrounding wireless device, a relative speed between the wireless device and the IAB node, or a mobility status indication.

[0124] 21. The method of solution 20, wherein the mobility state indication comprises at least one of: in a vehicle, outside a vehicle, entering a vehicle, or leaving a vehicle.

[0125] 22. A method of wireless communication (e.g. Fig.14 ), including: receiving, by an integrated access and backhaul (IAB) entity, wireless device mobility state information from a wireless device (1402); and communicating with the wireless device based on the wireless device mobility state information (1404). Additional details and examples are discussed with respect to embodiment 1.

[0126] 23. The method according to solution 22 further includes: before receiving the mobility status information of the wireless device, the wireless device sends mobility status report configuration information.

[0127] 24. A method according to solution 22, wherein the wireless device mobility state information includes at least one of the following: speed information, direction information, or location information, a relative speed between the wireless device and the IAB node, or a mobility state indication; and wherein the mobility state indication includes at least one of the following: inside a vehicle, outside a vehicle, entering a vehicle, or leaving a vehicle.

[0128] 25. The method according to solution 22, wherein the IAB entity comprises an IAB node or an IAB host.

[0129] 26. The method according to solution 19 or 23, wherein the mobility status report configuration information includes enabling or disabling mobility status reporting.

[0130] 27. A method according to any one of solutions 18, 22 or 25, wherein the IAB host further includes a first IAB host centralized unit (CU) and a second IAB host CU; the second IAB host CU receives the IAB node mobility status information or the wireless device mobility status information from the first IAB host CU; and wherein the IAB node mobility status information or the wireless device mobility status information includes at least one of the following: speed information, direction information, location information, an indication of a vehicle-mounted wireless device being served, an indication of a surrounding wireless device being served, a relative speed between a wireless device and an IAB node, or a mobility status indication.

[0131] 28. The method according to solution 27 further includes: receiving the mobility state information from the second IAB host CU by an IAB node or a host distributed unit (DU).

[0132] 29. The method according to solution 27, wherein the source IAB host CU sends at least one of the following to the target IAB host CU: quality of service (QoS) information, differentiated services code point (DSCP); flow label, or IP address of IAB node.

[0133] 30. The method according to solution 29 further includes: sending downlink mapping information from the target IAB host CU to the source IAB host CU; and wherein the downlink mapping information includes at least one of the following: IP address information, DSCP or flow label of the IAB node.

[0134] 31. A method of wireless communication (e.g. Fig.15 ), comprising: sending migration-related configuration information from an integrated access and backhaul (IAB) host to an IAB mobile node (1502); and wherein the migration-related configuration information comprises at least one of the following: a DU migration indication, an F1 establishment indication, a conditional configuration indication for IAB-mobile terminal (MT) migration (IAB-MT migration), an IAB-MT migration suppression indication, IP address information allocated by a source IAB host, IP address information allocated by a target IAB host, or a topology indication (1504). Additional details and examples are discussed with respect to Embodiment 3.

[0135] 32. A method of wireless communication (e.g. Fig.16), comprising: sending cell reselection configuration information from an integrated access and backhaul (IAB) host to an IAB node from the IAB host (1602); and wherein the cell reselection configuration information includes at least one of the following: a speed-dependent scaling parameter based on relative speed, a speed-dependent scaling mechanism enabling indication, or a speed-dependent scaling mechanism disabling indication (1604). Additional details and examples are discussed with respect to Embodiment 5.

[0136] 33. A method of wireless communication (e.g. Fig.17 ), comprising: sending cell reselection configuration information from an integrated access and backhaul (IAB) entity to a wireless device (1702); and wherein the cell reselection configuration information comprises at least one of the following: a speed-dependent scaling parameter based on relative speed, a speed-dependent scaling mechanism enabling indication, or a speed-dependent scaling mechanism disabling indication (1704). Additional details and examples are discussed with respect to embodiment 5.

[0137] 34. A method of wireless communication (e.g. Fig.18 ), comprising: receiving from an integrated access and backhaul (IAB) node mobility state information (1802); wherein the mobility state information comprises at least one of the following: speed information, direction information, an indication of a served vehicle wireless device, an indication of a served surrounding wireless device, location information, a speed-related scaling parameter based on a relative speed, or a threshold value of the speed of the IAB node (1804). Additional details and examples are discussed with respect to Embodiment 5.

[0138] 35. A communication device comprising a processor configured to implement the method according to any one or more of claims 1 to 34.

[0139] 35. An apparatus for wireless communication, comprising a processor configured to implement the method according to any one of claims 1 to 34.

[0140] 36. A computer readable medium having stored thereon code which, when executed by a processor, causes the processor to implement the method of any one of claims 1 to 34.

[0141] Some of the embodiments described herein are described in the general context of methods or processes, which in one embodiment can be implemented by a computer program product embodied in a computer-readable medium, including computer executable instructions such as program code executed by a computer in a networked environment. Computer-readable media may include removable and non-removable storage devices, including but not limited to read-only memory (ROM), random access memory (RAM), compact disc (CD), digital versatile disk (DVD), etc. Therefore, computer-readable media may include non-transient storage media. Generally, program modules may include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. Computer executable instructions or processor executable instructions, associated data structures, and program modules represent examples of program codes for executing the steps of the methods disclosed herein. The specific sequence of such executable instructions or associated data structures represents an example of corresponding actions for implementing the functions described in such steps or processes.

[0142] Some of the disclosed embodiments may be implemented as devices or modules using hardware circuits, software or combinations thereof. For example, a hardware circuit implementation may include discrete analog and / or digital components, which are, for example, integrated as a part of a printed circuit board. Alternatively or additionally, the disclosed components or modules may be implemented as application specific integrated circuits (ASIC) and / or field programmable gate arrays (FPGA) devices. Some embodiments may additionally or alternatively include a digital signal processor (DSP), which is a dedicated microprocessor with an architecture optimized for the operation needs of digital signal processing associated with the functions disclosed in the present application. Similarly, various components or subcomponents within each module may be implemented with software, hardware or firmware. Connectivity between modules and / or components within a module may be provided using any one of connectivity methods and media known in the art, including but not limited to communications over the Internet, wired or wireless networks using appropriate protocols.

[0143] Although this document contains many details, these details should not be interpreted as limitations on the scope of the claimed invention or the content that can be claimed, but rather as descriptions of features specific to a particular embodiment. Certain features described in this document in the context of a separate embodiment may also be implemented in a combination of a single embodiment. On the contrary, the various features described in the context of a single embodiment may also be implemented in multiple embodiments individually or in any suitable sub-combination. In addition, although features may be described above as working in some combinations or even initially claimed combinations, one or more features from the claimed combination may be deleted from the combination in some cases, and the claimed combination may involve a sub-combination or a variation of a sub-combination. Similarly, although operations are depicted in the accompanying drawings in a particular order, this should not be understood as requiring such operations to be performed in the specific order shown or in a continuous order, or performing all illustrated operations to achieve the desired result.

[0144] Only a few implementations and examples are described, and other implementations, enhancements, and variations may be made based on what is described and illustrated in this document.

Claims

1. A method of wireless communication, comprising: The IAB node mobility state information is sent from the IAB node to the IAB host.

2. The method according to claim 1, further comprising: Before sending the IAB node mobility status information, the IAB host receives mobility status report configuration information.

3. The method according to claim 1, wherein: The IAB node mobility state information includes at least one of the following: speed information, direction information, location information, an indication of a served vehicle wireless device, an indication of a served surrounding wireless device, a relative speed between the wireless device and the IAB node, or a mobility state indication.

4. The method according to claim 3, wherein: The mobility status indication includes at least one of: in a vehicle, outside a vehicle, entering a vehicle, or leaving a vehicle.

5. A method of wireless communication, comprising: Wireless device mobility state information is sent from the wireless device to an Integrated Access and Backhaul (IAB) entity.

6. The method according to claim 5, further comprising: Before sending the mobility status information of the wireless device, the wireless device receives mobility status report configuration information.

7. The method according to claim 6, wherein: The wireless device mobility state information includes at least one of: speed information, direction information, or location information, a relative speed between the wireless device and the IAB node, or a mobility state indication; and The mobility status indication includes at least one of the following: in a vehicle, outside a vehicle, entering a vehicle, or leaving a vehicle.

8. The method according to claim 5, wherein: The IAB entity includes an IAB node or an IAB host.

9. The method according to any one of claims 2 or 6, wherein: The mobility status report configuration information includes enabling or disabling the mobility status report.

10. The method according to any one of claims 1, 5 or 8, wherein: The IAB host also includes a first IAB host centralized unit (CU) and a second IAB host CU; sending the IAB node mobility state information or the wireless device mobility state information from the first IAB host CU to the second IAB host CU; and The IAB node mobility status information or the wireless device mobility status information includes at least one of the following: speed information, direction information, location information, an indication of a vehicle-mounted wireless device being served, an indication of a surrounding wireless device being served, a relative speed between a wireless device and an IAB node, or a mobility status indication.

11. The method according to claim 10, further comprising: The mobility state information is sent from the second IAB host CU to an IAB node or a host distributed unit (DU).

12. The method according to claim 10, wherein: The first IAB host CU sends at least one of the following to the second IAB host CU: quality of service (QoS) information, a differentiated services code point (DSCP); a flow label, or an IP address of an IAB node.

13. The method according to claim 12, further comprising: Receiving, by the first IAB host CU, downlink mapping information from the second IAB host CU; and The downlink mapping information includes at least one of the following items: IP address information of the IAB node, DSCP or flow label.

14. A method of wireless communication, comprising: Sending migration-related configuration information from the Integrated Access and Backhaul (IAB) host to the IAB mobile node; and The migration-related configuration information includes at least one of the following items: DU migration indication, F1 establishment indication, conditional configuration indication for IAB-mobile terminal (MT) migration (IAB-MT migration), IAB-MT migration suppression indication, IP address information allocated by the source IAB host, IP address information allocated by the target IAB host, or topology indication.

15. A method of wireless communication, comprising: Receiving, by an integrated access and backhaul (IAB) node, cell reselection configuration information from an IAB host; and The cell reselection configuration information includes at least one of the following items: a speed-dependent scaling parameter based on relative speed, a speed-dependent scaling mechanism enabling indication, or a speed-dependent scaling mechanism disabling indication.

16. A method of wireless communication, comprising: Receiving, by the wireless device, cell reselection configuration information from an integrated access and backhaul (IAB) entity; and The cell reselection configuration information includes at least one of the following items: a speed-dependent scaling parameter based on relative speed, a speed-dependent scaling mechanism enabling indication, or a speed-dependent scaling mechanism disabling indication.

17. A method of wireless communication, comprising: The IAB node mobility status information is sent by the access and backhaul integrated node; and The mobility state information includes at least one of the following: speed information, direction information, an indication of a served vehicle wireless device, an indication of a served surrounding wireless device, location information, a speed-related scaling parameter based on a relative speed, or a threshold of a speed of an IAB node.

18. A method of wireless communication, comprising: Receiving, by an integrated access and backhaul (IAB) host, IAB node mobility state information from the IAB node; as well as Communicate with the IAB node according to the IAB node mobility state information.

19. The method according to claim 18, further comprising: Before sending the IAB node mobility status information, mobility status report configuration information is sent from the IAB host.

20. The method according to claim 18, wherein: The IAB node mobility state information includes at least one of the following: speed information, direction information, location information, an indication of a served vehicle wireless device, an indication of a served surrounding wireless device, a relative speed between the wireless device and the IAB node, or a mobility state indication.

21. The method according to claim 20, wherein: The mobility status indication includes at least one of: in a vehicle, outside a vehicle, entering a vehicle, or leaving a vehicle.

22. A method of wireless communication, comprising: Receiving, by an integrated access and backhaul (IAB) entity, wireless device mobility state information from the wireless device; as well as Communicate with the wireless device based on the wireless device mobility state information.

23. The method according to claim 22, further comprising: Before receiving the mobility status information of the wireless device, the wireless device sends mobility status report configuration information.

24. The method according to claim 22, wherein: The wireless device mobility state information includes at least one of: speed information, direction information, or location information, a relative speed between the wireless device and the IAB node, or a mobility state indication; and The mobility status indication includes at least one of the following: in a vehicle, outside a vehicle, entering a vehicle, or leaving a vehicle.

25. The method according to claim 22, wherein: The IAB entity includes an IAB node or an IAB host.

26. The method according to any one of claims 19 or 23, wherein: The mobility status report configuration information includes enabling or disabling the mobility status report.

27. The method according to any one of claims 18, 22 or 25, wherein: The IAB host also includes a first IAB host centralized unit (CU) and a second IAB host CU; The second IAB host CU receives the IAB node mobility state information or the wireless device mobility state information from the first IAB host CU; and The IAB node mobility status information or the wireless device mobility status information includes at least one of the following: speed information, direction information, location information, an indication of a vehicle-mounted wireless device being served, an indication of a surrounding wireless device being served, a relative speed between a wireless device and an IAB node, or a mobility status indication.

28. The method according to claim 27, further comprising: The mobility state information is received by an IAB node or a host distributed unit (DU) from the second IAB host CU.

29. The method according to claim 27, wherein: The first IAB host CU sends at least one of the following to the second IAB host CU: quality of service (QoS) information, a differentiated services code point (DSCP); a flow label, or an IP address of an IAB node.

30. The method of claim 29, further comprising: Sending downlink mapping information from the second IAB host CU to the first IAB host CU; and The downlink mapping information includes at least one of the following items: IP address information of the IAB node, DSCP or flow label.

31. A method of wireless communication, comprising: Sending migration-related configuration information from the Integrated Access and Backhaul (IAB) host to the IAB mobile node; and The migration-related configuration information includes at least one of the following items: DU migration indication, F1 establishment indication, conditional configuration indication for IAB-mobile terminal (MT) migration (IAB-MT migration), IAB-MT migration suppression indication, IP address information allocated by the source IAB host, IP address information allocated by the target IAB host, or topology indication.

32. A method of wireless communication, comprising: Sending cell reselection configuration information from an integrated access and backhaul (IAB) host to an IAB node; and The cell reselection configuration information includes at least one of the following items: a speed-dependent scaling parameter based on relative speed, a speed-dependent scaling mechanism enabling indication, or a speed-dependent scaling mechanism disabling indication.

33. A method of wireless communication, comprising: Sending cell reselection configuration information from an integrated access and backhaul (IAB) entity to a wireless device; and The cell reselection configuration information includes at least one of the following items: a speed-dependent scaling parameter based on relative speed, a speed-dependent scaling mechanism enabling indication, or a speed-dependent scaling mechanism disabling indication.

34. A method of wireless communication, comprising: receiving, from an integrated access and backhaul (IAB) node, IAB node mobility state information; and The mobility state information includes at least one of the following: speed information, direction information, an indication of a served vehicle wireless device, an indication of a served surrounding wireless device, location information, a speed-related scaling parameter based on a relative speed, or a threshold of a speed of an IAB node.

35. A communication device comprising a processor configured to implement the method according to any one or more of claims 1 to 34.

36. A computer readable medium having stored thereon code which, when executed, causes a processor to implement the method according to any one or more of claims 1 to 34.

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