CN110636636A

CN110636636A - Signaling transmission method and device and network equipment

Info

Publication number: CN110636636A
Application number: CN201810654747.7A
Authority: CN
Inventors: 张大钧; 刘佳敏
Original assignee: Telecommunications Science and Technology Research Institute Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-06-22
Filing date: 2018-06-22
Publication date: 2019-12-31
Also published as: WO2019242332A1

Abstract

The invention provides a signaling transmission method, a signaling transmission device and network equipment, and relates to the technical field of communication. The signaling transmission method is applied to an Integrated Access Backhaul (IAB) node and comprises the following steps: sending a target signaling and adaptation layer information of the target signaling to target equipment; wherein the adaptation layer information includes: the access IAB node is a unique IAB node identifier under an IAB host centralized unit, a user identifier distributed to the user equipment by the access IAB node and a signaling radio bearer identifier of the user equipment. The scheme of the invention can correctly carry out signaling bearing mapping and reliable transmission on each hop of wireless node when the wireless backhaul exists in the 5G network.

Description

Signaling transmission method and device and network equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a signaling transmission method, an apparatus, and a network device.

Background

In the future development of mobile communication systems, in order to better meet user requirements and greatly improve network capacity and throughput, more transmission nodes and larger transmission bandwidth must be introduced. In the 5G network, as the number of access stations is greatly increased, it cannot be guaranteed that all access stations have the condition of wired backhaul, and introduction of a wireless access station cannot be avoided.

However, how to implement transmission for multi-hop 5G wireless backhaul node signaling becomes an urgent problem to be solved.

Disclosure of Invention

The invention aims to provide a signaling transmission method, a signaling transmission device and network equipment, which can accurately complete the reliable transmission of signaling bearer and provide stable signaling data transmission service for user equipment.

To achieve the above object, an embodiment of the present invention provides a signaling transmission method applied to an integrated access backhaul IAB node, including:

sending a target signaling and adaptation layer information of the target signaling to target equipment; wherein the content of the first and second substances,

the adaptation layer information includes: the access IAB node is a unique IAB node identifier under an IAB host centralized unit, a user identifier distributed to the user equipment by the access IAB node and a signaling radio bearer identifier of the user equipment.

Optionally, the adaptation layer information further includes a first indication identifier, where the first indication identifier is used to indicate whether the target signaling is centralized unit-distributed unit interface application protocol F1AP signaling.

Optionally, the step of sending the target signaling and the adaptation layer information of the target signaling to the target device includes:

determining a target signaling radio bearer for transmitting the used IAB according to the configured signaling radio bearer mapping relation and the adaptation layer information;

and sending the target signaling and the adaptation layer information of the target signaling to the target equipment through the target signaling radio bearer.

Optionally, before the step of sending the target signaling and the adaptation layer information of the target signaling to the target device through the target signaling radio bearer, the method includes:

adding a target signaling and adaptation layer information of the target signaling to a Protocol Data Unit (PDU), and adding a second indication identifier in the process of processing the PDU by a wireless link control layer, wherein the second indication identifier is used for indicating whether the PDU comprises the adaptation layer information of the target signaling;

the step of sending the target signaling and the adaptation layer information of the target signaling to the target device through the target signaling radio bearer includes:

and sending the PDU to the target equipment through the target signaling radio bearer.

Optionally, before the step of sending the target signaling and the adaptation layer information of the target signaling to the target device, the method includes:

acquiring a second indication identifier in the received PDU;

if the second indication identifier indicates that the PDU includes adaptation layer information of a target signaling, the step of determining a target signaling radio bearer for transmitting the used IAB according to the configured signaling radio bearer mapping relationship and the adaptation layer information is executed;

if the second indication identifier indicates that the PDU does not include adaptation layer information of the target signaling, after the current network device acquires the adaptation layer information, the step of determining the target signaling radio bearer for transmitting the used IAB according to the configured signaling radio bearer mapping relationship and the adaptation layer information is performed.

and if the target signaling is a downlink signaling of the user equipment and the current network equipment is an intermediate IAB node, after the adaptation layer information in the received PDU is acquired, forwarding the adaptation layer information to a corresponding distribution unit in the current network equipment according to the adaptation layer information and the pre-stored routing information.

Optionally, the method further comprises:

under the condition that the current network equipment determines that the current network equipment is an IAB node connected with the user equipment according to the received adaptation layer information, if the target signaling is the downlink signaling of the user equipment, the downlink signaling is sent to the user equipment through the signaling radio bearer of the corresponding user equipment; and if the target signaling is F1AP signaling, forwarding the F1AP signaling to an F1AP processing unit for processing.

Optionally, the method further comprises:

under the condition that the current network equipment is used as user equipment to establish Radio Resource Control (RRC) connection with a network, receiving signaling configuration information, and activating a transmission channel of F1AP and RRC signaling; the signaling configuration information includes an IAB node identifier that is unique to the current network device under the IAB home set unit.

Optionally, the signaling configuration information further includes a configured signaling radio bearer mapping relationship.

Optionally, the step of receiving signaling configuration information includes:

and if the current network equipment is the IAB node directly communicating with the host, receiving an RRC reconfiguration message sent by a distribution unit of the host, wherein the RRC reconfiguration message carries the signaling configuration information.

Optionally, after the step of receiving signaling configuration information, the method includes:

in attempting to establish the F1 connection with the home hub, the IAB node identification unique to the access IAB node under the IAB home hub is sent to the home hub.

Optionally, the step of receiving signaling configuration information includes:

and if the current network equipment is the IAB node indirectly communicated with the host, receiving an RRC reconfiguration message sent by the last IAB node of the current network equipment, wherein the RRC reconfiguration message carries the signaling configuration information.

in an attempt to establish the F1 connection with the home hub unit, the IAB node identifier unique to the access IAB node under the IAB home hub unit and the user identifier assigned by the access IAB node to the user equipment are sent to the home hub unit.

In order to achieve the above object, an embodiment of the present invention further provides a signaling transmission method, applied to an IAB host, including:

under the condition that a target signaling is an uplink signaling, obtaining the target signaling according to adaptation layer information of the target signaling; or

Under the condition that a target signaling is a downlink signaling, generating adaptation layer information of the target signaling, and sending the target signaling and the adaptation layer information of the target signaling to a first IAB node; wherein the content of the first and second substances,

Optionally, the adaptation layer information further includes a first indication identifier, where the first indication identifier is used to indicate whether the target signaling is F1AP signaling.

Optionally, the step of obtaining the target signaling according to the adaptation layer information of the target signaling includes:

and based on the signaling radio bearer for sending the target signaling and the adaptation layer information of the target signaling, determining a target grouped data gathering PDCP processing unit by a control plane CU-CP example of the target centralized unit according to the adaptation layer information, and obtaining the target signaling through the target PDCP processing unit.

Optionally, the step of sending the target signaling and the adaptation layer information of the target signaling to the first IAB node includes:

a CU-CP instance obtains a PDU (protocol data Unit) comprising a target signaling and adaptation layer information of the target signaling through a processing unit corresponding to the target signaling, and sends the PDU to a distribution unit through an F1AP message, wherein the F1AP message carries a signaling radio bearer identifier of a first IAB (inter-Access node);

and the distribution unit sends the PDU to the first IAB node through the corresponding signaling radio bearer according to the signaling radio bearer identification of the first IAB node.

Optionally, the step of sending the PDU to the first IAB node through a corresponding signaling radio bearer includes:

adding a second indication identifier in the process of processing the PDU by a radio link control layer, wherein the second indication identifier is used for indicating whether the PDU comprises adaptation layer information of a target signaling;

and sending the processed PDU to the first IAB node through a corresponding signaling radio bearer.

Optionally, the method further comprises:

under the condition that a second IAB node is used as user equipment to establish RRC connection with a network, if the second IAB node is in direct communication with a host, the CU-CP instance saves an IAB node identifier of the second IAB node as a cell radio network temporary identifier of the user equipment, and completes an RRC establishment process and activates a transmission channel of F1AP and RRC signaling.

Optionally, the method further comprises:

the CU-CP example sends a user equipment context establishment request message to a distribution unit, wherein the user equipment context establishment request message carries third indication information, and the third indication information indicates that the current user equipment of the distribution unit is an IAB node;

the distribution unit feeds back a user equipment context establishment response message to the CU-CP instance;

after receiving the ue context setup response message, the CU-CP instance constructs an RRC reconfiguration message, and sends the RRC reconfiguration message to the distribution unit through F1AP of the second IAB node;

the distribution unit sends the RRC reconfiguration message to the second IAB node; wherein the content of the first and second substances,

the RRC reconfiguration message carries signaling configuration information.

Optionally, the method further comprises:

under the condition that a third IAB node is used as user equipment to establish RRC connection with a network, if the third IAB node is indirectly communicated with a host, a distribution unit forwards a received PDU to a CU-CP instance through F1AP of a fourth IAB node, wherein the fourth IAB node is a parent node of the third IAB node;

and the CU-CP example saves the IAB node identification of the third IAB node as the user identification of the user equipment according to the F1AP, completes the RRC establishment process and activates the F1AP and the transmission channel of the RRC signaling.

Optionally, the method further comprises:

the CU-CP example sends a user equipment context establishment request message to a distribution unit, wherein the user equipment context establishment request message carries fourth indication information, and the fourth indication information indicates that the current user equipment of the fourth node is an IAB node;

the distribution unit sends an RRC connection establishment message carrying the fourth indication information to the third IAB node, and feeds back a user equipment context establishment response message to the CU-CP instance;

after receiving the ue context setup response message, the CU-CP instance constructs an RRC reconfiguration message, and sends the RRC reconfiguration message to the distribution unit through F1AP of the third IAB node;

the distribution unit sends the RRC reconfiguration message to the fourth IAB node, so that the fourth IAB node forwards the RRC reconfiguration message to the third IAB node; wherein the content of the first and second substances,

the RRC reconfiguration message carries signaling configuration information.

In order to achieve the above object, an embodiment of the present invention further provides a signaling transmission apparatus, applied to an IAB node, including:

the sending module is used for sending the target signaling and the adaptation layer information of the target signaling to the target equipment; wherein the content of the first and second substances,

In order to achieve the above object, an embodiment of the present invention further provides a signaling transmission apparatus, applied to an IAB host, including:

the processing module is used for obtaining the target signaling according to the adaptation layer information of the target signaling under the condition that the target signaling is the uplink signaling; or

In order to achieve the above object, an embodiment of the present invention further provides a network device, where the network device is an IAB node, and the network device includes: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor;

the transceiver is used for sending a target signaling and adaptation layer information of the target signaling to a target device; wherein the content of the first and second substances,

Optionally, the processor is further configured to:

the transceiver is further configured to: and sending the target signaling and the adaptation layer information of the target signaling to the target equipment through the target signaling radio bearer.

Optionally, the processor is further configured to:

the transceiver is further configured to:

Optionally, the transceiver is further configured to:

acquiring a second indication identifier in the received PDU;

the processor is further configured to:

Optionally, the processor is further configured to:

Optionally, the transceiver is further configured to:

Optionally, the processor is further configured to:

Optionally, the transceiver is further configured to:

To achieve the above object, an embodiment of the present invention further provides a network device, where the network device is an IAB host, and the network device includes: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor;

the processor is used for obtaining a target signaling according to the adaptation layer information of the target signaling under the condition that the target signaling is an uplink signaling; or

Optionally, the processor is further configured to:

Optionally, the transceiver is further configured to:

Optionally, the processor is further configured to:

the transceiver is further configured to: and sending the processed PDU to the first IAB node through a corresponding signaling radio bearer.

Optionally, the processor is further configured to:

Optionally, the transceiver is further configured to:

the RRC reconfiguration message carries signaling configuration information.

Optionally, the transceiver is further configured to:

the processor is further configured to: and the CU-CP example saves the IAB node identification of the third IAB node as the user identification of the user equipment according to the F1AP, completes the RRC establishment process and activates the F1AP and the transmission channel of the RRC signaling.

Optionally, the transceiver is further configured to:

the RRC reconfiguration message carries signaling configuration information.

To achieve the above object, an embodiment of the present invention further provides a computer-readable storage medium, having a computer program stored thereon, where the computer program, when executed by a processor, implements the steps in the signaling transmission method applied to the IAB node as described above.

To achieve the above object, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps in the signaling transmission method applied to the IAB host as described above.

The technical scheme of the invention has the following beneficial effects:

when the target signaling is sent to the target equipment, the method of the embodiment of the invention also sends the adaptation layer information of the target signaling, which comprises the unique IAB node identification of the access IAB node under the IAB host Donor centralized unit CU, the user identification distributed by the access IAB node for the user equipment and the signaling radio bearer identification of the user equipment, to the target equipment, so that the target equipment can acquire the relevant identification information of the target signaling, and correctly perform signaling bearer mapping and reliable transmission on each hop radio node, thereby meeting the subsequent requirements of serving the UE and transmitting data and improving the system management efficiency.

Drawings

Fig. 1 is a schematic diagram of a signaling transmission method according to an embodiment of the present invention;

FIG. 2 is a flow chart of signaling configuration in an embodiment of the present invention;

fig. 3 is a schematic diagram of a signaling transmission method according to another embodiment of the present invention;

fig. 4 is a schematic diagram of a signaling transmission apparatus according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a signaling transmission apparatus according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a network device according to another embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

Aiming at the problem that the transmission of multi-hop 5G wireless backhaul node signaling cannot be realized at present, the invention provides a signaling transmission method, so that when wireless backhaul exists in a 5G network, signaling bearing mapping and reliable transmission can be correctly carried out on each hop wireless node, the requirements of subsequent service and data transmission for User Equipment (UE) are met, and the system management efficiency is improved.

As shown in fig. 1, a signaling transmission method according to an embodiment of the present invention is applied to an integrated access backhaul IAB node, and includes:

step 101, sending a target signaling and adaptation layer information of the target signaling to a target device; wherein the adaptation layer information includes: the access IAB node is a unique IAB node identifier under an IAB host centralized unit, a user identifier distributed to the user equipment by the access IAB node and a signaling radio bearer identifier of the user equipment.

Here, the target signaling may be uplink signaling (e.g. radio resource control RRC signaling) of the user, centralized unit-distributed unit interface application protocol F1AP signaling, or downlink signaling of the user. For different target signaling, the target device may be a next-hop IAB node or an IAB Donor.

It should be appreciated that in a 5G network, an IAB node is mainly composed of two parts: a distribution unit DU part and an analogue mobile terminal function MT part. In this way, the UE can access the network through the IAB node, or one IAB node as the UE can access the network through another IAB node (i.e., a parent node of the IAB node as the UE). Therefore, in this embodiment, the access IAB node is an IAB node used by the UE or an access network of the IAB node as the UE. For example, if UE a accesses the network through IAB node 1(IAB node 1), IAB node1 is the access IAB node of UE a; when the IAB node1 is used as the UE, the network is accessed through the IAB node2, and then the IAB node2 is the access IAB node when the IAB node1 is used as the UE.

Through the above steps, when the target signaling is sent to the target device by the IAB node, the IAB node also sends the adaptation layer information of the target signaling, which includes the unique IAB node identifier of the access IAB node under the IAB host Donor centralized unit CU, the user identifier allocated by the access IAB node for the user equipment, and the signaling radio bearer identifier of the user equipment, to the target device, so that the target device can acquire the relevant identifier information of the target signaling, and correctly perform signaling bearer mapping and reliable transmission on each hop radio node, so as to meet the subsequent requirements for UE service and data transmission, and improve the system management efficiency.

Assume that 2 IAB nodes are included in the network: IAB node1 and IAB node2, where IAB node1 and IAB node2 are the IAB node identifiers that are unique to IAB nodes under the Donor CU. The UE A accesses the network through the IAB node1, and the user identifier distributed to the UE A by the IAB node1 is UE 1. When IAB node1 needs to send the uplink signaling of UE a to IAB node2 and the signaling radio bearer SRB of the uplink signaling of UE a is identified as SRB1, the uplink signaling, IAB node1, UE1, and SRB1 can be sent to IAB node2, so that IAB node2 can determine to forward the uplink signaling to the SRB of the IAB corresponding to the Donor, such as SRB1 of the IAB, based on IAB node1, UE1, and SRB 1. When the IAB node2 continues to send the uplink signaling of the UE a to the Donor, the IAB node1, the UE1, and the SRB1 are also sent to the Donor, so that the Donor addresses the corresponding processing unit to solve the uplink signaling for the adaptation layer information.

Here, considering the particularity of F1AP signaling compared to uplink signaling and downlink signaling of the UE (e.g. configuring dedicated SRB), the adaptation layer information also includes the first indicator. The first indication flag can indicate a specific F1AP signaling type in addition to indicating whether it is F1AP signaling. Of course, the adaptation layer information may also implicitly indicate whether the target signaling is F1AP signaling by whether the first indication flag exists, which is not described herein again.

Optionally, step 101 comprises:

In the sending process, firstly, the configured signaling radio bearer mapping relationship and adaptation layer information determine the target signaling radio bearer of the IAB used for transmission, and then the target signaling and the adaptation layer information of the target signaling are sent to the target device through the target signaling radio bearer, so as to achieve correct signaling bearer mapping and reliable transmission.

In this embodiment, before the target signaling and its adaptation layer information are sent, the target signaling and its adaptation layer information are added to the PDU for radio link layer control layer RLC/medium access control layer MAC/physical layer PHY processing, and the PDU is sent to the target device through the determined target signaling radio bearer. Particularly, in the process of RLC/layer processing the PDU, a second indication identifier of adaptation layer information is added, wherein the second indication identifier indicates whether the PDU comprises a target signaling, so that the target equipment can distinguish whether the PDU is newly generated UE or DU data or data transferred from IAB according to the second indication identifier. For the SRB data packet transferred from the target device, after removing the RLC/MAC/PHY layer, the target device forwards the SRB data packet to the corresponding MT part for processing, and notifies the target device that the SRB data packet is not subjected to processing of adding adaptation layer information any more.

Optionally, before step 101, the method comprises:

acquiring a second indication identifier in the received PDU;

That is, the current IAB node is to obtain the second indicator in the received PDU, and distinguish whether it is newly generated UE or DU data or data from the IAB relay based on the second indicator. And if the second indication identifier indicates that the PDU comprises adaptation layer information of the target signaling, executing the step of determining the target signaling radio bearer of the IAB used for transmission according to the configured signaling radio bearer mapping relation and the adaptation layer information, and then sending the target signaling and the adaptation layer information of the target signaling to the target equipment through the target signaling radio bearer.

Optionally, before step 101, the method includes:

Optionally, the method further comprises:

Here, the current network device (i.e., IAB node) can determine from the received adaptation layer information whether itself is an IAB node (i.e., access IAB node) to which the UE is connected. Thus, under the condition that the current IAB is the access IAB of the UE, if the target signaling is the downlink signaling of the UE, the downlink signaling is sent to the user equipment through the corresponding SRB of the UE; and if the target signaling is F1AP signaling, forwarding the F1AP signaling to the F1AP processing unit for processing.

Optionally, the method further comprises:

In this embodiment, the signaling radio bearer mapping relationship may be stored in each node and each host by default, and the signaling radio bearer mapping relationship may be: SRB1 of the UE corresponds to SRB1 of the IAB, SRB2 of the UE corresponds to SRB2 of the IAB, SRB3 of the UE corresponds to SRB3 of the IAB, and SRB 0 of the UE or pure F1AP signaling of the UE is mapped to SRB1 of the IAB or other specific SRBs. Of course, the signaling radio bearer mapping relationship is not limited to the above form, and may also be configured by customization, and at this time, the signaling radio bearer mapping relationship needs to be carried by the signaling configuration information for notification.

Optionally, the step of receiving signaling configuration information includes:

Here, as an IAB node directly communicating with the home, the current network device needs to send, to the home concentration unit, an IAB node identifier unique to the access IAB node under the IAB home concentration unit in the process of attempting to establish the F1 connection with the home concentration unit, so that the home can subsequently perform processing based on the mapping relationship.

Optionally, the step of receiving signaling configuration information includes:

At this time, if the current network device does not communicate with the anchor directly, it needs to receive the RRC reconfiguration message carrying the signaling configuration information sent by the previous IAB node closer to the anchor.

Here, as an IAB node indirectly communicating with the home, the current network device needs to send, to the home concentration unit, an IAB node identifier unique to the access IAB node under the IAB home concentration unit and a user identifier allocated to the user equipment by the access IAB node in an attempt to establish the F1 connection with the home concentration unit, so that the home can subsequently perform processing based on the mapping relationship.

In this embodiment, it should also be appreciated that the IAB Donor consists essentially of two parts: a DU part and a CU part; among them, the IAB Donor will select the applicable centralized unit-control plane CU-CP instance to provide the signaling service of F1AP for the accessed UE or the IAB node as the UE.

Therefore, the specific application of the signaling transmission method of the embodiment of the present invention is as follows:

example 1 processing flow of uplink signaling bearer

Step 1: the target signaling is the F1AP signaling generated by the uplink signaling (RRC) or DU part of the UE, the DU part of the access IAB node selects the corresponding MT part according to a certain strategy (such as a flow threshold), and then the selected MT part completes the mapping to the SRB signaling bearer of the corresponding IAB. E.g., IAB node1, will map directly to the SRB1/2/3 of the IAB for SRB1/2/3 signaling from UE1 under this node, and optionally map to SRB1 of the IAB or other specific SRBs for SRB 0 or pure F1AP signaling from this node UE.

Step 2: the MT part of the access IAB node constructs the adaptation layer information of the above signaling, wherein at least the following information elements are added to the adaptation layer: IAB node ID, IAB-RNTI ID, and SRB ID of the UE, optionally an indication of whether F1AP signaling.

And step 3: and performing radio link layer control layer RLC/medium access control layer MAC/physical layer PHY processing on the PDU obtained by the signaling and the adaptation layer information. For the PDU to which the adaptation layer information is newly added, it is identified whether the RLC PDU includes the adaptation layer information of the target signaling, and specifically, the PDU may be identified as a transit packet or already includes the adaptation layer information.

And 4, step 4: the DU part of the last hop IAB node (as the parent node of the access IAB node) or other intermediate IAB node connected to the access IAB node will distinguish whether it is newly generated UE or DU data or data transferred from the IAB according to the id in the RLC PDU. And for the SRB data packet transferred from the mobile terminal, after the RLC/MAC/PHY layer is removed, the SRB data packet is transferred to the corresponding MT part for processing, and the corresponding MT part is informed that the SRB data packet is not subjected to the processing of adding the adaptation layer information any more.

And 5: the MT part of the intermediate IAB node will directly follow the adaptation layer information of the PDU, such as: the SRB id of the UE and the like complete the mapping to the SRB signaling bearer corresponding to the IAB, as described in step 1, and then the same as step 3.

Step 6: for the signaling bearer, the DU part of the Donor transmits the PDU (containing adaptation layer information) of the signaling bearer to the CU-CP instance corresponding to the signaling bearer of the first-hop IAB (i.e., the IAB directly communicating with the Donor). For example in the form of a container, is included in the F1AP message and is transmitted to the corresponding CU-CP instance over the corresponding stream control transmission protocol SCTP alliance.

And 7: the corresponding CU-CP instance further addresses the PDU to the corresponding PDCP processing unit according to the adaptation layer information, and then resolves the corresponding RRC signaling, for example: SRB1 signaling PDU from UE finds out corresponding PDCP processing unit through IAB-RNTI ID + IAB node ID of adaptation layer information and SRB ID information; the F1AP signaling PDU from the access IAB node finds the corresponding PDCP processing unit through the adaptation layer information (IAB node ID + F1AP indication), and transfers the signaling to the corresponding processing unit after solving the F1AP signaling.

Example 2 processing flow of downlink signaling bearer

Step 1: for downlink signaling of the UE, a UE RRC/F1AP processing unit corresponding to the Donor CU-CP instance generates a signaling PDU of the UE, and then adds adaptation layer information for the PDU, including at least: the IAB node ID, IAB-RNTI ID, and UE SRB ID information are finally sent to the doror DU entity in a container manner through F1AP message, where the message includes the SRB ID of the first hop IAB, and optionally indicates whether to relay the PDU (including adaptation layer information).

Step 2: and the Donor DU entity transfers the received F1AP information to a corresponding SRB bearer for RLC/MAC/PHY processing according to the SRB id of the first hop IAB, wherein whether the RLC PDU is required to be identified as a transfer data packet or not is sent to the MT part of the first hop IAB.

And step 3: the MT part of the middle IAB node (as a child node) is responsible for transferring data packets from other IAB nodes (as a father node) or the SRBs of the Donor DU to remove the RLC/MAC/PHY layer, and then forwarding the data packets to the corresponding DU part for processing according to the information of the adaptation layer, such as IABnode id, and the routing related information stored by the MT part;

and 4, step 4: the DU part of the intermediate IAB node (as a child node) will complete mapping to the next hop IAB SRB according to the adaptation layer information, for example, for the relay SRB1/2/3 signaling, it will be directly mapped to the SRB1/2/3 of the IAB, and for the F1AP signaling, it is optionally mapped to the SRB1 of the IAB or other specific SRBs, then similar to step 2, perform RLC/MAC/PHY processing, and send the signaling packet to the MT part of the next hop IAB;

and 5: the MT part of the last hop IAB node is responsible for transferring a data packet from the SRB of the last hop IAB node, removing the RLC/MAC/PHY layer, judging the data packet as the last hop IAB node according to the IAB node id of the adaptation layer information, and directly forwarding the PDU to the corresponding DU part for processing for the SRB signaling carrying packet of the UE; for the F1AP signaling packet, the signaling packet is forwarded to the PDCP/RRC processing unit of the IAB, the F1AP signaling packet is solved, and then the processed PDU is forwarded to the corresponding DU part.

Step 6: accessing the DU part of the IAB node, the following processing is performed according to the information of the MT, for example: for the SRB signaling packet of the UE, the RLC/MAC/PHY processing is directly carried out and the signaling packet is sent to the UE on the corresponding SRB bearing of the UE; and for the F1AP signaling packet, the signaling packet is directly sent to the F1AP processing unit for subsequent processing.

Example 3, in conjunction with fig. 2, signaling configuration flow for UE signaling bearer

(IAB node 2)

Step 1: the IAB node2 is used as UE to start up and establish RRC connection with the network, at this time, a Donor DU selects a proper Donor CU-CP example to provide signaling service of F1AP for the UE, the Donor CU-CP example stores the IAB node2 as a cell radio network temporary identifier (CRNTI ID) of the UE, and completes the corresponding RRC establishment process (through UL/DL RRCmessage transfer (uplink/downlink RRC message transfer) information of the IAB 2).

Step 2: the Donor CU-CP instance initiates a UE context setup procedure (establishing SRB2 and data radio bearer DRB for OAM for operation, management and maintenance), wherein the UE context setup request message needs to carry an indicator to indicate the Donor DU, the UE is an IAB node, so that the Donor DU can apply functions such as adaptation layer and the like for a data packet of the IAB. After receiving the UE context setup response, the Donor CU-CP instance constructs an RRC reconfiguration message, transmits the RRC reconfiguration message to the Donor DU through F1AP of the IAB node2, and then transmits the Donor DU to the MT part of the IAB node2, thereby completing the configuration of the SRB2 and DRB for OAM. The IAB node2 needs to obtain the IAB node identifier from the OAM configuration parameters, and the identifier is unique under each Donor CU.

And step 3: IAB node2 will activate F1AP and SRB signaling channels for the DU part, where the DU of IAB node2 needs to be able to transmit F1AP packets to Donor via a specific SRB, e.g., SRB1, of the MT part; the DU of the IAB node2 can also enable the SRB packet from the UE to be transmitted to the Donor through a specific SRB of the MT part, such as SRB 1/2/3. (Note: this step may also be performed after step 1)

Optionally, the RRC reconfiguration message in step 2 includes configuration information of a signaling radio bearer mapping relationship, for example: for SRB1/2/3 signaling from a UE under the IAB node, it will map directly onto the SRB1/2/3 of the IAB, and for SRB 1AP signaling from the IAB node, it may optionally map onto SRB1 of the IAB or other specific SRBs. The IAB node2 will then activate F1AP and the SRB signaling transport channel for the DU part as described in step 3.

And 4, step 4: when IAB node2 tries to establish F1 connection with Donor CU, it provides relevant IAB node ID to Donor CU, where the newly obtained IAB2 node ID can be carried in the adaptation layer information, and after receiving the ID, Donor CU saves it in the context.

(IAB node 1)

And 5: when the IAB node1 is turned on as a UE to establish an RRC connection with the network, the DU part of the IAB node2 allocates a unique identifier in the IAB node, such as an IAB-RNTI ID, to the UE (i.e., the IAB node 1), and constructs F1 AP: initial uplink RRC message initial UL RRC message, the identity of which is to be included in the adaptation layer information (optionally also in the F1AP message), then PDU is to be included as a container in the RRC message and sent to the Donor, after receipt by the Donor du, it is passed through the F1AP message of IAB node2, for example: and the UL RRC message transfer message is forwarded to the Donor CU-CP instance, then the Donor CU-CP instance resolves the corresponding F1AP message, stores the IAB node1 as the identification IAB-RNTI ID of the UE, and completes the subsequent RRC establishment process (through the UL/DL RRC message transfer message of the IAB 2) according to the received RRC establishment request message (optionally, the RRC establishment message carries the IAB-RNTI ID).

Step 6: the IAB node1 needs to establish a PDU session to download the configuration parameters related to OAM. Then, the Donor CU-CP instance initiates a UE context setup procedure for the IAB node2 (establish SRB2 and DRB for OAM, activate an access stratum AS security mode), optionally, an indicator needs to be carried in the message to indicate the IAB2, and the UE is the IAB node, so that the IAB2 can apply functions such AS an adaptation layer for a data packet of the IAB. This information is contained in the RRC message of IABnode 2 in the container form and is conveyed to IAB node2 via corresponding F1AP and SRB; after receiving the UE context setup response, the RRC reconfiguration message is constructed and transmitted to the Donor DU through the F1AP of the IAB node1, and then transmitted to the MT part of the IAB1 by the IAB node2, and the configuration of the SRB2 and DRB for OAM is completed. The IAB node1 obtains the IAB node identifier from the OAM configuration parameters, and the identifier is unique under each Donor CU.

And 8: IAB node1 will activate F1AP and SRB signaling channels for the DU part, where the DU of IAB needs to be enabled to transmit F1AP packets to Donor via a specific SRB of the MT part, e.g., SRB 1; the IAB DU can also transmit the SRB data packet from the UE to the Donor through the specific SRB of the MT part, such as the SRB 1/2/3. (Note: this step may also be performed after step 5)

Optionally, the RRC reconfiguration message in step 7 may include configuration information of the mapping relationship, for example: for SRB1/2/3 signaling from a UE under the IAB1 node, it will map directly onto SRB1/2/3 of IAB1, and for SRB1 node F1AP signaling, optionally onto SRB1 of IAB1 or other specific SRBs. The IAB node1 will then activate F1AP and the SRB signaling transport channel for the DU part, as described in step 8.

And step 9: when IAB node1 tries to establish F1 connection with Donor CU, providing relevant IAB node identification to Donor CU; the adaptation layer information can carry a newly obtained IAB node1 identifier and an IAB-RNTI ID, so that the donor CU-CP can address to a correct PDCP/RRC processing unit (SRB processing entity of the IAB node) according to the adaptation layer information, and simultaneously, the new IAB node1 identifier is stored in a corresponding F1AP context for subsequent addressing.

Step 10: the IAB node1 may provide a service to the access UE, the SRB bearer of the UE may be transmitted to the Donor through the corresponding SRB bearers of the IAB node1 and the IAB node2, and the F1AP signaling for the UE may also be transmitted to the Donor through the specific SRB bearers of the IAB node1 and the IAB node2, where the signaling data transmission mechanism is described in embodiment 1/2.

In summary, in the signaling transmission method according to the embodiment of the present invention, when the target signaling is sent to the target device, the IAB node also sends adaptation layer information of the target signaling, which includes an IAB node identifier unique to the access IAB node under the IAB Donor CU, a user identifier allocated to the user equipment by the access IAB node, and a signaling radio bearer identifier of the user equipment, to the target device, so that the target device can obtain related identifier information of the target signaling, and perform signaling bearer mapping and reliable transmission correctly on each hop radio node, so as to meet the subsequent requirements for serving the UE and data transmission, thereby improving the system management efficiency.

As shown in fig. 3, a signaling transmission method according to an embodiment of the present invention is applied to an IAB host, and includes:

step 301a, under the condition that a target signaling is an uplink signaling, obtaining the target signaling according to adaptation layer information of the target signaling; or

Step 301b, in case that a target signaling is a downlink signaling, generating adaptation layer information of the target signaling, and sending the target signaling and the adaptation layer information of the target signaling to a first IAB node; wherein the content of the first and second substances,

Here, the IAB Donor obtains the uplink signaling according to the adaptation layer information of the received uplink signaling; and for the downlink signaling, generating adaptation layer information of the downlink signaling, and sending the downlink signaling and the adaptation layer information thereof to a first IAB node, wherein the first IAB node is an IAB node directly communicating with an IAB Donor. Therefore, the signaling bearer mapping and reliable transmission can be correctly carried out on each hop of wireless node, so that the follow-up requirements for UE service and data transmission are met, and the system management efficiency is improved.

When the downlink signaling and the adaptation layer information thereof are sent to the first IAB node, the SRB identification information of the first IAB node is also sent.

In this embodiment, the IAB Donor mainly comprises two parts: a DU part and a CU part; among them, the IAB Donor will select the applicable CU-CP instance to provide the signaling service of F1AP for the accessed UE or the IAB node as the UE.

Optionally, in step 301a, the step of obtaining the target signaling according to the adaptation layer information of the target signaling includes:

Optionally, in step 301b, the step of sending the target signaling and the adaptation layer information of the target signaling to the first IAB node includes:

Optionally, the method further comprises:

the RRC reconfiguration message carries signaling configuration information.

Optionally, the method further comprises:

the RRC reconfiguration message carries signaling configuration information.

It should be noted that, the signaling transmission method in the embodiment of the present invention is applied to an IAB host, and the signaling transmission method applied to an IAB node in the previous embodiment jointly implements multi-hop 5G wireless backhaul node signaling transmission.

As shown in fig. 4, a signaling transmission apparatus according to an embodiment of the present invention is applied to an IAB node, and includes:

a sending module 401, configured to send a target signaling and adaptation layer information of the target signaling to a target device; wherein the content of the first and second substances,

Wherein the adaptation layer information further comprises a first indication identifier, and the first indication identifier is used for indicating whether the target signaling is centralized unit-distributed unit interface application protocol F1AP signaling.

Optionally, the sending module includes:

a determining submodule, configured to determine a target signaling radio bearer of the IAB used for transmission according to the configured signaling radio bearer mapping relationship and the adaptation layer information;

and the first sending submodule is used for sending the target signaling and the adaptation layer information of the target signaling to the target equipment through the target signaling radio bearer.

Optionally, the sending module further includes:

the addition processing submodule is used for adding the target signaling and the adaptation layer information of the target signaling into a Protocol Data Unit (PDU), and adding a second indication identifier in the process of carrying out radio link control layer processing on the PDU, wherein the second indication identifier is used for indicating whether the PDU comprises the adaptation layer information of the target signaling;

the first sending submodule is further configured to:

Optionally, the apparatus further comprises:

the acquisition module is used for acquiring a second indication identifier in the received PDU;

a first execution processing module, configured to execute the step of determining a target signaling radio bearer for transmitting the used IAB according to the configured signaling radio bearer mapping relationship and the adaptation layer information if the second indication identifier indicates that the PDU includes the adaptation layer information of the target signaling;

and a second execution processing module, configured to, if the second indication identifier indicates that the PDU does not include adaptation layer information of the target signaling, execute, after the current network device acquires the adaptation layer information, the step of determining, according to the configured signaling radio bearer mapping relationship and the adaptation layer information, a target signaling radio bearer for transmitting the used IAB.

Optionally, the apparatus further comprises:

and the forwarding module is used for forwarding the adaptation layer information to a corresponding distribution unit in the current network equipment according to the adaptation layer information and prestored routing information after acquiring the adaptation layer information in the received PDU if the target signaling is a downlink signaling of the user equipment and the current network equipment is an intermediate IAB node.

Optionally, the apparatus further comprises:

a sending processing module, configured to send, when a current network device determines that the current network device is an IAB node connected to the user equipment according to received adaptation layer information, a downlink signaling to the user equipment through a signaling radio bearer of a corresponding user equipment if a target signaling is the downlink signaling of the user equipment; and if the target signaling is F1AP signaling, forwarding the F1AP signaling to an F1AP processing unit for processing.

Optionally, the apparatus further comprises:

the receiving processing module is used for receiving the signaling configuration information and activating the transmission channel of the F1AP and RRC signaling under the condition that the current network equipment is used as user equipment to establish Radio Resource Control (RRC) connection with the network; the signaling configuration information includes an IAB node identifier that is unique to the current network device under the IAB home set unit.

Optionally, the receiving processing module includes:

and the first receiving submodule is used for receiving the RRC reconfiguration message sent by the distribution unit of the host if the current network equipment is the IAB node directly communicating with the host, wherein the RRC reconfiguration message carries the signaling configuration information.

Optionally, the receiving processing module further includes:

and a second sending submodule, configured to send, to the anchor concentrator, an IAB node identifier of the access IAB node unique to the IAB anchor concentrator in a process of attempting to establish the F1 connection with the anchor concentrator.

Optionally, the receiving processing module includes:

and a second receiving submodule, configured to receive, if the current network device is an IAB node indirectly communicating with the host, an RRC reconfiguration message sent by an immediately previous IAB node of the current network device, where the RRC reconfiguration message carries the signaling configuration information.

Optionally, the receiving processing module further includes:

and a third sending submodule, configured to send, to the anchor centralized unit, an IAB node identifier unique to the access IAB node under the IAB anchor centralized unit and a user identifier allocated by the access IAB node to the user equipment, in a process of attempting to establish the F1 connection with the anchor centralized unit.

When the target signaling is sent to the target equipment, the device of the embodiment of the invention also sends the adaptation layer information of the target signaling, which comprises the unique IAB node identification of the access IAB node under the IAB host Donor centralized unit CU, the user identification distributed by the access IAB node for the user equipment and the signaling radio bearer identification of the user equipment, to the target equipment, so that the target equipment can acquire the relevant identification information of the target signaling, and correctly perform signaling bearer mapping and reliable transmission on each hop radio node, thereby meeting the subsequent requirements of serving the UE and transmitting data, and improving the system management efficiency.

It should be noted that, the apparatus applies the signaling transmission method applied to the IAB node, and the implementation manner of the embodiment of the signaling transmission method applied to the IAB node is applicable to the apparatus and can also achieve the same technical effect.

As shown in fig. 5, a signaling transmission apparatus according to an embodiment of the present invention, which is applied to an IAB host, includes:

a processing module 501, configured to obtain a target signaling according to adaptation layer information of the target signaling when the target signaling is an uplink signaling; or

Wherein the adaptation layer information further comprises a first indication identifier, and the first indication identifier is used for indicating whether the target signaling is F1AP signaling.

Optionally, the processing module includes:

and the first processing submodule is used for determining a target grouped data gathering PDCP processing unit by a control plane CU-CP example of the target centralized unit according to the adaptation layer information based on the signaling radio bearer for sending the target signaling and the adaptation layer information of the target signaling, and obtaining the target signaling through the target PDCP processing unit.

Optionally, the processing module includes:

a second processing module, configured to obtain, by a CU-CP instance through a processing unit corresponding to the target signaling, a PDU that includes the target signaling and adaptation layer information of the target signaling, and send the PDU to a distribution unit through an F1AP message, where the F1AP message carries a signaling radio bearer identifier of the first IAB node;

and the third processing module is used for sending the PDU to the first IAB node through the corresponding signaling radio bearer according to the signaling radio bearer identifier of the first IAB node by the distribution unit.

Optionally, the third processing module includes:

a first processing sub-module, configured to add a second indication identifier in a process of performing radio link control layer processing on the PDU, where the second indication identifier is used to indicate whether the PDU includes adaptation layer information of a target signaling;

and the second processing submodule is used for sending the processed PDU to the first IAB node through a corresponding signaling radio bearer.

Optionally, the apparatus further comprises:

the first special processing module is used for saving the IAB node identifier of the second IAB node as the cell radio network temporary identifier of the user equipment and completing the RRC establishment process and activating the transmission channel of F1AP and RRC signaling if the second IAB node is in direct communication with the host under the condition that the second IAB node is used as the user equipment to establish RRC connection with the network.

Optionally, the apparatus further comprises:

a first context establishment request module, configured to send, by the CU-CP instance, a ue context establishment request message to a distribution unit, where the ue context establishment request message carries third indication information, and the third indication information indicates that a current ue of the distribution unit is an IAB node;

a first context setup response module, configured to feed back, by the distribution unit, a ue context setup response message to the CU-CP instance;

a first reconfiguration processing module, configured to, after receiving the ue context setup response message, the CU-CP instance construct an RRC reconfiguration message, and send the RRC reconfiguration message to the distribution unit through F1AP of the second IAB node;

a first reconfiguration transmitting module, configured to send, by the distribution unit, the RRC reconfiguration message to the second IAB node; wherein the content of the first and second substances,

the RRC reconfiguration message carries signaling configuration information.

Optionally, the apparatus further comprises:

a second special processing module, configured to, when a third IAB node is used as a user equipment to establish an RRC connection with a network, if the third IAB node indirectly communicates with a host, forward, by a distribution unit, a received PDU to a CU-CP instance through F1AP of a fourth IAB node, where the fourth IAB node is a parent node of the third IAB node;

and the third special processing module is used for the CU-CP instance to save the IAB node identifier of the third IAB node as the user identifier of the user equipment according to the F1AP, complete the RRC establishment process and activate the transmission channel of the F1AP and the RRC signaling.

Optionally, the apparatus further comprises:

a second context establishment request module, configured to send, by the CU-CP instance, a ue context establishment request message to a distribution unit, where the ue context establishment request message carries fourth indication information, and the fourth indication information indicates that the current ue of the fourth node is an IAB node;

a second context establishing response module, configured to send, by the distribution unit, the RRC connection establishment message carrying the fourth indication information to the third IAB node, and feed back a user equipment context establishing response message to the CU-CP instance;

a second reconfiguration processing module, configured to, after receiving the ue context setup response message, the CU-CP instance construct an RRC reconfiguration message, and send the RRC reconfiguration message to the distribution unit through F1AP of the third IAB node;

a second reconfiguration transmitting module, configured to send, by the distribution unit, the RRC reconfiguration message to the fourth IAB node, so that the fourth IAB node forwards the RRC reconfiguration message to the third IAB node; wherein the content of the first and second substances,

the RRC reconfiguration message carries signaling configuration information.

The device of the embodiment of the invention obtains the uplink signaling according to the adaptation layer information of the received uplink signaling; and for the downlink signaling, generating adaptation layer information of the downlink signaling, and sending the downlink signaling and the adaptation layer information thereof to a first IAB node, wherein the first IAB node is an IAB node directly communicating with an IAB Donor. Therefore, the signaling bearer mapping and reliable transmission can be correctly carried out on each hop of wireless node, so that the follow-up requirements for UE service and data transmission are met, and the system management efficiency is improved.

It should be noted that, the apparatus applies the signaling transmission method applied to the IAB host, and the implementation manner of the embodiment of the signaling transmission method applied to the IAB host is applicable to the apparatus and can also achieve the same technical effect.

As shown in fig. 6, a network device according to an embodiment of the present invention is an IAB node, and includes: a transceiver 610, a memory 620, a processor 630, and a program stored on the memory 620 and executable on the processor 630;

Optionally, the processor is further configured to:

the transceiver is further configured to:

Optionally, the transceiver is further configured to:

acquiring a second indication identifier in the received PDU;

the processor is further configured to:

Optionally, the processor is further configured to:

Optionally, the transceiver is further configured to:

Optionally, the processor is further configured to:

Optionally, the transceiver is further configured to:

In FIG. 6, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 630, and various circuits of memory, represented by memory 620, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 610 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 630 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 630 in performing operations.

As shown in fig. 7, a network device according to an embodiment of the present invention is an IAB host, and includes: a transceiver 710, a memory 720, a processor 730, and a program stored on the memory 720 and executable on the processor 730;

Optionally, the processor is further configured to:

Optionally, the transceiver is further configured to:

Optionally, the processor is further configured to:

Optionally, the transceiver is further configured to:

the RRC reconfiguration message carries signaling configuration information.

Optionally, the transceiver is further configured to:

the RRC reconfiguration message carries signaling configuration information.

In FIG. 7, a bus architecture (represented by bus 700), bus 700 may include any number of interconnected buses and bridges, bus 700 linking together various circuits including one or more processors, represented by processor 730, and memory, represented by memory 720. The bus 700 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 740 provides an interface between bus 700 and transceiver 710. The transceiver 710 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. Data processed by processor 730 is transmitted over a wireless medium via antenna 750, and further, antenna 750 receives and transmits data to processor 730.

Processor 730 is responsible for managing bus 700 and general processing, and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 720 may be used to store data used by processor 730 in performing operations.

Alternatively, processor 730 may be a CPU, ASIC, FPGA, or CPLD.

Another embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in the signaling transmission method applied to an IAB node as described above.

Another embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in the signaling transmission method applied to an IAB host as described above.

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

It is further noted that the user devices described in this specification include, but are not limited to, smart phones, tablets, etc., and that many of the features described are referred to as modules in order to more particularly emphasize their implementation independence.

In embodiments of the present invention, modules may be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be constructed as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different bits which, when joined logically together, comprise the module and achieve the stated purpose for the module.

Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Likewise, operational data may be identified within the modules and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network.

When a module can be implemented by software, considering the level of existing hardware technology, a module implemented by software may build a corresponding hardware circuit to implement a corresponding function, without considering cost, and the hardware circuit may include a conventional Very Large Scale Integration (VLSI) circuit or a gate array and an existing semiconductor such as a logic chip, a transistor, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.

The exemplary embodiments described above are described with reference to the drawings, and many different forms and embodiments of the invention may be made without departing from the spirit and teaching of the invention, therefore, the invention is not to be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of elements may be exaggerated for clarity. The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Unless otherwise indicated, a range of values, when stated, includes the upper and lower limits of the range and any subranges therebetween.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A signaling transmission method is applied to an Integrated Access Backhaul (IAB) node, and is characterized by comprising the following steps:

2. The signaling transmission method according to claim 1, wherein said adaptation layer information further includes a first indication identifier, said first indication identifier is used to indicate whether said target signaling is centralized unit-distributed unit interface application protocol F1AP signaling.

3. The signaling transmission method according to claim 1, wherein the step of sending the target signaling and the adaptation layer information of the target signaling to the target device comprises:

4. The signaling transmission method according to claim 3, wherein the step of sending the target signaling and the adaptation layer information of the target signaling to the target device via the target signaling radio bearer is preceded by:

5. The signaling transmission method according to claim 3, wherein before the step of sending the target signaling and the adaptation layer information of the target signaling to the target device, the method comprises:

acquiring a second indication identifier in the received PDU;

6. The signaling transmission method according to claim 1, wherein before the step of sending the target signaling and the adaptation layer information of the target signaling to the target device, the method comprises:

7. The signaling transmission method according to claim 1, characterized in that said method further comprises:

8. The signaling transmission method according to claim 1, characterized in that said method further comprises:

9. The signaling transmission method according to claim 8, wherein the signaling configuration information further includes a configured signaling radio bearer mapping relationship.

10. The signaling transmission method according to claim 8, wherein the step of receiving the signaling configuration information comprises:

11. The signaling transmission method according to claim 10, wherein after the step of receiving signaling configuration information, the method comprises:

12. The signaling transmission method according to claim 8, wherein the step of receiving the signaling configuration information comprises:

13. The signaling transmission method according to claim 12, wherein after the step of receiving signaling configuration information, the method comprises:

14. A signaling transmission method is applied to an IAB host, and is characterized by comprising the following steps:

15. The signaling transmission method of claim 14, wherein the adaptation layer information further includes a first indication identifier, and wherein the first indication identifier is used to indicate whether the target signaling is F1AP signaling.

16. The signaling transmission method according to claim 14, wherein the step of obtaining the target signaling according to the adaptation layer information of the target signaling comprises:

17. The signaling transmission method according to claim 14, wherein the step of sending the target signaling and the adaptation layer information of the target signaling to the first IAB node comprises:

18. The signaling transmission method according to claim 17, wherein the step of sending the PDU to the first IAB node through the corresponding signaling radio bearer comprises:

19. The signaling transmission method according to claim 14, characterized in that the method further comprises:

20. The signaling transmission method according to claim 19, characterized in that said method further comprises:

the RRC reconfiguration message carries signaling configuration information.

21. The signaling transmission method according to claim 14, characterized in that the method further comprises:

22. The signaling transmission method according to claim 21, characterized in that said method further comprises:

the RRC reconfiguration message carries signaling configuration information.

23. A signaling apparatus applied to an IAB node, comprising:

24. A signaling apparatus for an IAB host, comprising:

25. A network device, the network device being an IAB node, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; it is characterized in that the preparation method is characterized in that,

26. The network device of claim 25, wherein the adaptation layer information further comprises a first indication flag indicating whether the target signaling is centralized unit-distributed unit interface application protocol F1AP signaling.

27. The network device of claim 25, wherein the processor is further configured to:

28. The network device of claim 27, wherein the processor is further configured to:

the transceiver is further configured to:

29. The network device of claim 27, wherein the transceiver is further configured to:

acquiring a second indication identifier in the received PDU;

the processor is further configured to:

30. The network device of claim 25, wherein the processor is further configured to:

31. The network device of claim 25, wherein the transceiver is further configured to:

32. The network device of claim 25, wherein the processor is further configured to:

33. The network device of claim 32, wherein the signaling configuration information further comprises a configured signaling radio bearer mapping relationship.

34. The network device of claim 32, wherein the transceiver is further configured to:

35. The network device of claim 34, wherein the transceiver is further configured to:

36. The network device of claim 32, wherein the transceiver is further configured to:

37. The network device of claim 36, wherein the transceiver is further configured to:

38. A network device that is an IAB host, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; it is characterized in that the preparation method is characterized in that,

39. The network device of claim 38, wherein the adaptation layer information further comprises a first indication flag indicating whether the target signaling is F1AP signaling.

40. The network device of claim 38, wherein the processor is further configured to:

41. The network device of claim 38, wherein the transceiver is further configured to:

42. The network device of claim 41, wherein the processor is further configured to:

43. The network device of claim 38, wherein the processor is further configured to:

44. The network device of claim 43, wherein the transceiver is further configured to:

the RRC reconfiguration message carries signaling configuration information.

45. The network device of claim 38, wherein the transceiver is further configured to:

46. The network device of claim 45, wherein the transceiver is further configured to:

the RRC reconfiguration message carries signaling configuration information.

47. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 13.

48. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method according to any one of claims 14 to 22.