WO2019242332A1

WO2019242332A1 - Signaling transmission method and apparatus, and network device

Info

Publication number: WO2019242332A1
Application number: PCT/CN2019/077657
Authority: WO
Inventors: 张大钧; 刘佳敏
Original assignee: 电信科学技术研究院有限公司
Priority date: 2018-06-22
Filing date: 2019-03-11
Publication date: 2019-12-26
Also published as: CN110636636A

Abstract

Provided by the present disclosure are a signaling transmission method and apparatus and a network device. The signaling transmission method is applied to an integrated access backhaul (IAB) node and comprises: sending a target signaling and adaptation layer information of the target signaling to a target device, wherein the adaptation layer information comprises: a unique IAB node identifier of an access IAB node under an IAB host centralized unit, a user identifier allocated to a user equipment by the access IAB node, as well as a signaling radio bearer identifier of the user equipment.

Description

Signaling transmission method, device and network equipment

Cross-reference to related applications

This application claims the priority of Chinese Patent Application No. 201810654747.7 filed in China on June 22, 2018, the entire contents of which are hereby incorporated by reference.

Technical field

The present disclosure relates to the field of communication technologies, and in particular, to a signaling transmission method, apparatus, and network equipment.

Background technique

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

However, how to realize the signaling transmission for a multi-hop 5G wireless backhaul node has become an urgent problem.

Summary of the Invention

The purpose of the present disclosure is to provide a signaling transmission method, device and network equipment, which can correctly complete the reliable transmission of signaling bearers and provide stable signaling data transmission services for user equipment.

To achieve the above object, an embodiment of the present disclosure provides a signaling transmission method, which is applied to an integrated access backhaul IAB node and includes:

Sending the target signaling and the adaptation layer information of the target signaling to the target device;

The adaptation layer information includes the unique IAB node identifier of the access IAB node under the IAB host centralized unit, the user identifier allocated by the access IAB node to the user equipment, and the 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 a 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 the target signaling radio bearer of the IAB used for transmission according to the configured signaling radio bearer mapping relationship and the adaptation layer information;

Sending the target signaling and the adaptation layer information of the target signaling to the target device 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 the target signaling and the adaptation layer information of the target signaling to the protocol data unit PDU, and in the process of performing radio link control layer processing on the PDU, adding a second indication identifier, the second indication identifier being used Adaptation layer information for indicating whether the PDU includes 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:

Sending the PDU to the target device 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:

Obtaining a second indication identifier in the received PDU;

If the second indication identifier indicates that the PDU includes the adaptation layer information of the target signaling, performing the determining of the target of the IAB used for transmission according to the configured signaling radio bearer mapping relationship and the adaptation layer information Steps for signaling radio bearer;

If the second indication identifier indicates that the PDU does not include the adaptation layer information of the target signaling, then after the current network device obtains the adaptation layer information, execute the radio bearer mapping relationship according to the configured signaling and The adaptation layer information determines the steps of transmitting the target signaling radio bearer of the IAB used.

If the target signaling is the downlink signaling of the user equipment, and the current network equipment is an intermediate IAB node, after obtaining the adaptation layer information in the received PDU, forward it according to the adaptation layer information and pre-stored routing information. The adaptation layer information is sent to a corresponding distribution unit in the current network device.

Optionally, the method further includes:

In the case that the current network device determines that it is an IAB node connected to the user equipment according to the received adaptation layer information, if the target signaling is the downlink signaling of the user equipment, the signaling radio bearer is transmitted through the corresponding user equipment. Sending the downlink signaling to the user equipment; if the target signaling is F1AP signaling, the F1AP signaling is forwarded to a F1AP processing unit for processing.

Optionally, the method further includes:

When the current network device serves as a user equipment to establish a radio resource control RRC connection with the network, it receives signaling configuration information and activates the transmission channel of F1AP and RRC signaling; wherein the signaling configuration information includes the current network device in the IAB The unique IAB node identifier under the host centralized unit.

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

Optionally, the step of receiving signaling configuration information includes:

If the current network device is an IAB node that directly communicates with the host, it receives an RRC reconfiguration message sent by the distribution unit of the host, and the RRC reconfiguration message carries the signaling configuration information.

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

In the process of trying to establish an F1 connection with the host centralized unit, the unique IAB node identifier of the IAB node under the IAB host centralized unit is sent to the host centralized unit.

Optionally, the step of receiving signaling configuration information includes:

If the current network device is an IAB node that indirectly communicates with the host, it receives an RRC reconfiguration message sent by a previous IAB node of the current network device, and the RRC reconfiguration message carries the signaling configuration information.

In the process of establishing an F1 connection with the host centralized unit, the unique IAB node identifier of the access IAB node under the IAB host centralized unit and the user ID assigned by the access IAB node to the user equipment are sent to the host centralized unit.

In order to achieve the above object, an embodiment of the present disclosure further provides a signaling transmission method, which is applied to an IAB host and includes:

When the target signaling is uplink signaling, obtaining the target signaling according to the adaptation layer information of the target signaling; or

When the target signaling is 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; where ,

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:

Based on the signaling radio bearer that sends the target signaling and the adaptation layer information of the target signaling, the target centralized unit control plane CU-CP instance determines the target packet data summary PDCP processing unit based on the adaptation layer information. And obtaining the target signaling through a target PDCP processing unit.

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

The CU-CP instance obtains a PDU including the target signaling and the adaptation layer information of the target signaling through a processing unit corresponding to the target signaling, and sends the PDU to the distribution unit through an F1AP message. The F1AP message carries the signaling radio bearer identifier of the first IAB node;

The distribution unit sends 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.

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

In the process of performing radio link control layer processing on the PDU, adding a second indication identifier, where the second indication identifier is used to indicate whether the PDU includes the adaptation layer information of the target signaling;

Send the processed PDU to the first IAB node through the corresponding signaling radio bearer.

Optionally, the method further includes:

In the case where the second IAB node serves as the user equipment to establish an RRC connection with the network, if the second IAB node directly communicates with the host, the CU-CP instance saves the IAB node identifier of the second IAB node as the cell radio of the user equipment. The network temporarily identifies and completes the RRC establishment process and activates the F1AP and RRC signaling transmission channels.

Optionally, the method further includes:

Sending, by the CU-CP instance, a user equipment context establishment request message to a distribution unit, the user equipment context establishment request message carrying third indication information, where the third indication information indicates that the current user equipment of the distribution unit is an IAB node;

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

After receiving the user equipment context establishment response message, the CU-CP instance constructs an RRC reconfiguration message, and sends the RRC reconfiguration message to the distribution unit through the F1AP of the second IAB node;

Sending, by the distribution unit, the RRC reconfiguration message to the second IAB node;

The RRC reconfiguration message carries signaling configuration information.

Optionally, the method further includes:

In the case where the third IAB node serves as a user equipment to establish an RRC connection with the network, if the third IAB node communicates indirectly with the host, the distribution unit forwards the received PDU to the CU-CP through the F1AP of the fourth IAB node For example, the fourth IAB node is a parent node of the third IAB node;

The CU-CP instance stores the IAB node identifier of the third IAB node as the user identifier of the user equipment according to the F1AP, completes the RRC establishment process, and activates the F1AP and RRC signaling transmission channels.

Optionally, the method further includes:

The CU-CP instance sends a user equipment context establishment request message to a distribution unit, 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 feedbacks a user equipment context establishment response message to the CU-CP instance;

After receiving the user equipment context establishment response message, the CU-CP instance constructs an RRC reconfiguration message, and sends the RRC reconfiguration message to the distribution unit through the F1AP of the third IAB node;

Sending, 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 RRC reconfiguration message carries signaling configuration information.

To achieve the above object, an embodiment of the present disclosure further provides a signaling transmission device, which is applied to an IAB node and includes:

A sending module, configured to send the target signaling and the adaptation layer information of the target signaling to the target device;

To achieve the above object, an embodiment of the present disclosure further provides a signaling transmission device, which is applied to an IAB host and includes:

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

In order to achieve the above object, an embodiment of the present disclosure further provides a network device. The network device is an IAB node and includes a transceiver, a memory, a processor, and a memory stored on the memory and on the processor. Running programs

The transceiver is configured to send the target signaling and the adaptation layer information of the target signaling to the target device;

Optionally, the processor is further configured to:

The transceiver is further configured to send the target signaling and the adaptation layer information of the target signaling to the target device through the target signaling radio bearer.

Optionally, the processor is further configured to:

The transceiver is further configured to:

Sending the PDU to the target device through the target signaling radio bearer.

Optionally, the transceiver is further configured to:

Obtaining a second indication identifier in the received PDU;

The processor is further configured to:

Optionally, the processor is further configured to:

If the target signaling is the downlink signaling of the user equipment, and the current network equipment is an intermediate IAB node, after obtaining the adaptation layer information in the received PDU, forward it according to the adaptation layer information and the pre-stored routing information. The adaptation layer information is sent to a corresponding distribution unit in the current network device.

Optionally, the transceiver is further configured to:

Optionally, the processor is further configured to:

Optionally, the transceiver is further configured to:

In order to achieve the above object, an embodiment of the present disclosure further provides a network device, which is an IAB host and includes: a transceiver, a memory, a processor, and stored on the memory and can run on the processor. program of;

The processor is configured to obtain the target signaling according to the adaptation layer information of the target signaling when the target signaling is 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 send 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: the CU-CP instance saves the IAB node identifier of the third IAB node as the user identifier of the user equipment according to the F1AP, completes the RRC establishment process, and activates the F1AP and RRC signaling transmission channels. .

Optionally, the transceiver is further configured to:

The RRC reconfiguration message carries signaling configuration information.

In order to achieve the above object, an embodiment of the present disclosure further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the application is implemented in the IAB as described above. Steps in a node's signaling transmission method.

In order to achieve the above object, an embodiment of the present disclosure further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the application is implemented in the IAB as described above. Steps in the signaling method of the host.

The beneficial effects of the above technical solutions of the present disclosure are as follows:

In the method of the embodiment of the present disclosure, when the target signaling is sent to the target device, the target signaling also includes the unique IAB node identifier of the IAB node under the IAB host Donor centralized unit CU, and the IAB node is the user. The user identification allocated by the device and the adaptation layer information of the signaling radio bearer identification of the user equipment are sent to the target device, so that the target device can learn the related identification information of the target signaling and perform the correct operation on each hop wireless node. Signaling bearer mapping and reliable transmission to meet the needs of subsequent service and data transmission for the UE and improve system management efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

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

2 is a flowchart of signaling configuration in an embodiment of the present disclosure;

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

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

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

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

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

detailed description

In order to make the technical problems, technical solutions, and advantages of the present disclosure clearer, the following describes in detail with reference to the accompanying drawings and specific embodiments.

The present disclosure addresses a problem in the related art that cannot realize the signaling transmission of a multi-hop 5G wireless backhaul node, and provides a signaling transmission method so that when a wireless backhaul exists in a 5G network, it can be correctly performed on each hop wireless node. Signaling bearer mapping and reliable transmission to meet the subsequent needs for user equipment UE service and data transmission, and improve system management efficiency.

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

Step 101: Send the target signaling and the adaptation layer information of the target signaling to the target device, where the adaptation layer information includes: the unique IAB node identifier of the access IAB node under the IAB host centralized unit, access The user identifier allocated by the inbound IAB node to the user equipment and the signaling radio bearer identifier of the user equipment.

Here, the target signaling may be uplink signaling of the user (such as radio resource control RRC signaling), centralized unit-distribution unit interface application protocol F1AP signaling, or downlink signaling of the user. For different target signaling, the target device can be the next hop IAB node or the IAB host Donor.

It should be known that in a 5G network, the IAB node mainly includes two parts: a distribution unit DU part and an analog mobile terminal function MT part. In this way, the UE can access the network through the IAB node, or an IAB node acts as the UE and accesses the network through another IAB node (that is, the parent node of the IAB node of the UE). Therefore, in this embodiment, the access IAB node is a UE or an IAB node used by the IAB node as the UE to access the network. For example, if UE A accesses the network through IAB node 1 (IAB node 1), then IAB node 1 is the access node of UE A; if IAB node 1 is the UE and accesses the network through IAB node 2, then IAB node 2 is IAB When node 1 is used as the UE, it accesses the IAB node.

Through the above steps, when the IAB node sends the target signaling to the target device, it also includes the unique IAB node identifier of the target IAB node under the IAB host Donor centralized unit CU and accesses the IAB node as the user equipment. The assigned user identifier and the adaptation layer information of the signaling radio bearer identifier of the user equipment are sent to the target device, so that the target device can learn the relevant identification information of the target signaling and correctly perform the information on each hop wireless node. Make bearer mapping and reliable transmission to meet the needs of subsequent service and data transmission for the UE, and improve system management efficiency.

Assume that the network includes two IAB nodes: IAB node1 and IAB node2. Among them, IABnode1 and IABnode2 are the unique IAB node identifiers of IAB nodes under Donor CU. UE A accesses the network through IAB node 1, and the user identity assigned by IAB node 1 to UE A is UE1. When IAB node 1 needs to send the uplink signaling of UE A to IAB node 2 and the signaling radio bearer SRB identifier of UE A's uplink signaling is SRB1, it can send the uplink signaling, IAB node 1, UE1, and SRB1. Go to IAB node 2, so that IAB node 2, based on IAB node 1, UE1, and SRB1, can determine the SRB that forwards the uplink signaling to the IAB corresponding to Donor, such as SRB1 of IAB. When IAB node 2 continues to send UE A's uplink signaling to Donor, it will also send IAB node 1, UE1, and SRB1 to Donor, so that Donor addresses the adaptation layer information to the corresponding processing unit to resolve the uplink signaling. .

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

Here, considering the specificity of the F1AP signaling compared to the UE's uplink signaling and downlink signaling (such as configuring a dedicated SRB), the adaptation layer information often includes a first indication identifier. In addition to indicating whether it is F1AP signaling, the first indication identifier can also indicate a specific F1AP signaling type. Of course, the adaptation layer information may also implicitly indicate whether the target signaling is F1AP signaling through the presence of the first indication identifier, which is not described again here.

Optionally, step 101 includes:

Here, in the sending process, the target signaling radio bearer of the IAB used for transmission will be determined from the configured signaling radio bearer mapping relationship and adaptation layer information, and then the target signaling and The adaptation layer information of the target signaling is sent to the target device to achieve correct signaling bearer mapping and reliable transmission.

Sending the PDU to the target device through the target signaling radio bearer.

In this embodiment, before sending the target signaling and its adaptation layer information, 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 The process sends the PDU to the target device through the determined target signaling radio bearer. Especially in the process of performing RLC / layer processing on the PDU, a second indication identifier is added to indicate whether the PDU includes adaptation layer information of the target signaling, so that the target device can distinguish whether it is a newly generated UE according to the second indication identifier. Or DU data, or data from IAB transit. For the inbound SRB data packet, after the target device removes the RLC / MAC / PHY layer, it forwards it to the corresponding MT for processing, and notifies it that it will not perform the processing of adding the adaptation layer information.

Optionally, before step 101, the method includes:

Obtaining a second indication identifier in the received PDU;

That is, the current IAB node needs to obtain the second indication identifier in the received PDU, and based on the second indication identifier, it is distinguished whether it is newly generated UE or DU data or data from the IAB transit. If the second indication identifier indicates that the PDU includes the adaptation layer information of the target signaling, performing the determining of the target signaling of the IAB used for transmission according to the configured signaling radio bearer mapping relationship and the adaptation layer information The step of the radio bearer then sends the target signaling and the adaptation layer information of the target signaling to the target device through the target signaling radio bearer.

Optionally, before step 101, the method includes:

Optionally, the method further includes:

Here, the current network device (that is, the IAB node) can determine whether it is an IAB node (that is, an access IAB node) that is connected to the UE from the received adaptation layer information. In this case, if the current IAB node is the access IAB node 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; if the target signaling is F1AP Signaling, the F1AP signaling is forwarded to the F1AP processing unit for processing.

Optionally, the method further includes:

In this embodiment, the mapping relationship of the signaling radio bearer may be stored in each node and the host by default, and the mapping relationship of the signaling radio bearer may be: SRB of the UE corresponds to SRB of the IAB, and SRB of the UE corresponds to SRB of the IAB. , SRB3 of UE corresponds to SRB3 of IAB, and SRB0 or pure F1AP signaling of UE is mapped to SRB1 or other specific SRB of IAB. Of course, the signaling radio bearer mapping relationship is not limited to the above-mentioned form, and can also be configured by customization. In this case, the signaling radio bearer mapping relationship needs to be carried through the signaling configuration information for notification.

Optionally, the step of receiving signaling configuration information includes:

Here, as an IAB node that directly communicates with the host, the current network device needs to send the unique IAB node identifier of the IAB node under the IAB host centralized unit to the host centralized unit in an attempt to establish an F1 connection with the host centralized unit. This enables the host to subsequently process based on the mapping relationship.

Optionally, the step of receiving signaling configuration information includes:

At this time, the current IAB node that the network device does not directly communicate with the host needs to receive an RRC reconfiguration message sent by the last IAB node closer to the host and carrying the signaling configuration information.

Here, as an IAB node that indirectly communicates with the host, the current network device needs to send and access the IAB node ’s unique IAB node identifier under the IAB host centralized unit and access the IAB node during the process of establishing an F1 connection with the host centralized unit. The user identifier allocated by the user equipment is sent to the host centralized unit, so that the host can subsequently process based on the mapping relationship.

In this embodiment, it should also be known that the IAB Donor mainly includes two parts: the DU part and the CU part; among them, the IAB Donor will select an applicable centralized unit-control plane CU-CP instance to be used as the access UE or as the UE. IAB nodes provide F1AP signaling services.

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

Example 1. Processing flow of uplink signaling bearer

Step 1: The target signaling is the uplink signaling (RRC) of the UE or the F1AP signaling generated by the DU part. The DU part that accesses the IAB node selects the corresponding MT part according to a certain policy (such as a traffic threshold). The MT part completes the mapping to the SRB signaling bearer of the corresponding IAB. For example, IAB node1, for SRB 1/2/3 signaling from UE1 under this node, will be directly mapped to SRB1 / 2/3 of IAB, and for SRB0 or pure F1AP signaling from UE of this node, Optionally, it is mapped to the SRB of the IAB or other specific SRB.

Step 2: The MT part of the access IAB node will construct the adaptation layer information of the above signaling, and at least the following information elements will be added to the adaptation layer: IAB node ID, IAB-RNTI ID, and SRB ID of the UE, Optionally, it is an indication identifier of F1AP signaling.

Step 3: For the PDU obtained from the above signaling and adaptation layer information, radio link layer control layer RLC / medium access control layer MAC / physical layer PHY processing will be performed. For a PDU with newly added adaptation layer information, whether the adaptation layer information of the target signaling is included in the RLC PDU is identified. Specifically, it can be identified as a transit data packet or already contains the adaptation layer information.

Step 4: Connect the previous hop IAB node (as the parent node of the access IAB node) or the DU part of the other intermediate IAB node connected to the IAB node to distinguish whether it is the newly generated UE or DU data according to the identifier in the RLC PDU. , Or the data from the IAB transit. For the SRB data packets that are in transit, after removing the RLC / MAC / PHY layer, it is forwarded to the corresponding MT part for processing, and it is notified that it will not perform the processing of adding the adaptation layer information.

Step 5: The MT part of the intermediate IAB node will directly complete the mapping to the SRB signaling bearer corresponding to the IAB according to the adaptation layer information of the PDU, such as the SRB ID of the UE. 3 Same.

Step 6: The DU part of Donor, for the signaling bearer, will transmit the PDU (including the adaptation layer information) carried by the signaling to the first-hop IAB (that is, the IAB directly communicating with Donor) signaling CU- CP instance. For example, it is included in the F1AP message in the form of a container and is transmitted to the corresponding CU-CP instance through the corresponding flow control transmission protocol SCTP European Union.

Step 7: According to the corresponding CU-CP instance, this PDU is further addressed to the corresponding PDCP processing unit according to the adaptation layer information, and then the corresponding RRC signaling is solved, for example: the SRB1 signaling PDU from the UE. Find the corresponding PDCP processing unit by IAB-RNTI ID + IAB node ID of the layer information, and SRB ID information; F1AP signaling PDU from the access IAB node, find it through the adaptation layer information (IAB node ID + F1AP indication) The corresponding PDCP processing unit resolves the F1AP signaling and transfers it to the corresponding processing unit.

Example 2: Processing flow of downlink signaling bearer

Step 1: For the downlink signaling of the UE, the 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 to this PDU, including at least: IAB node ID, IAB -RNTI ID and UE SRB ID information, and finally sent to Donor's DU entity in a container via F1AP message, this message contains the SRB ID of the first hop IAB, and optionally, indicates whether to forward the PDU (including the adaptation layer information) ).

Step 2: The Donor DU entity forwards the received F1AP information to the corresponding SRB bearer for RLC / MAC / PHY processing according to the SRB id of the first hop IAB. The RLC PDU requires Identifies whether it is a transit data packet and sends it to the MT part of the first hop IAB.

Step 3: The MT part of the intermediate IAB node (as a child node) will be responsible for transferring the SRB from other IAB nodes (as the parent node) or Donor DU, removing the RLC / MAC / PHY layer, and then according to the adaptation layer Information, such as IAB, node ID, and routing related information saved by itself, forward it to the corresponding DU part for processing;

Step 4: The DU part of the intermediate IAB node (as a child node) will complete the mapping to the next hop IAB and SRB according to the adaptation layer information. For example, for the transit SRB 1/2/3 signaling, it will be directly mapped to the IAB. SRB on 1/2/3, and for F1AP signaling, optionally, map to SRB1 or other specific SRB of the IAB, and then perform RLC / MAC / PHY processing similar to step 2, and send signaling data packets Give the MT part of the next hop IAB;

Step 5: The MT part of the last-hop IAB node will be responsible for transferring the SRB from the previous-hop IAB node, remove the RLC / MAC / PHY layer, and then judge it as the last according to the IAB nodeid of the adaptation layer information. A hop IAB node directly forwards the PDU to the corresponding DU part for the UE SRB signaling bearer; for the F1AP signaling packet, it forwards it to the PDCP / RRC processing unit of the IAB, and resolves the F1AP signaling packet, and then Forward the processed PDU to the corresponding DU part.

Step 6: The DU part accessing the IAB node will perform subsequent processing according to the MT information. For example, for the UE SRB signaling packet, RLC / MAC / PHY processing will be performed directly and sent to the UE on the corresponding UE SRB bearer. ; For the F1AP signaling packet, it is directly sent to the F1AP processing unit for subsequent processing.

Example 3. In conjunction with FIG. 2, the signaling configuration process carried by the UE signaling

(IAB node 2)

Step 1: IAB node 2 starts up as the UE and establishes an RRC connection with the network. At this time, Donor DU selects the appropriate Donor CU-CP instance to provide F1AP signaling services for it. The Donor CU-CP instance will save IAB node 2 as the UE's The cell radio network temporarily identifies the CRNTI ID and completes the corresponding RRC establishment process (through UL / DL RRC message transfer (uplink / downlink RRC message transfer) messages of IAB2).

Step 2: The Donor CU-CP instance initiates a UE context context establishment process (establishing SRB2 and a data radio bearer DRB for OAM for operation, management, and maintenance), wherein the UE context establishment UE context setup request message needs to carry an indicator identifier Instruct Donor DU that the UE is an IAB node, so that Donor DU can apply functions such as the adaptation layer to the IAB data packet. After receiving the response from the UE, the CU-CP instance, the Donor CU-CP instance will construct an RRC reconfiguration RRC reconfiguration message, and send it to Donor DU through the F1AP of IAB node 2. Then, the Donor DU will transmit it to the MT part of IAB node 2 to complete the Configuration of SRB2 and DRB for OAM. IAB node2 needs to obtain the IAB node ID from the OAM configuration parameter, and this ID is unique under each Donor CU.

Step 3: IAB node 2 will activate the F1AP and SRB signaling transmission channels for the DU part. Here, the DU of this IAB node 2 needs to be able to transmit the F1AP data packet through the specific SRB of the MT part, such as SRB1, to Donor. ; It can also enable the DU of the IAB node 2 to transmit the SRB data packet from the UE to Donor through the specific SRB of the MT part, such as SRB1 / 2/3. (Note: this step may also be performed after step 1)

Wherein, optionally, the RRC reconfiguration message in step 2 will contain the configuration information of the signaling radio bearer mapping relationship, for example, for SRB 1/2/3 signaling from a UE under an IAB node, it will be directly mapped to the IRB SRB On 1/2/3, and for the F1AP signaling from the IAB node, optionally, it is mapped to the SRB of the IAB or other specific SRB. Then IAB node 2 will activate the F1AP and SRB signaling transmission channels for the DU part, as described in step 3.

Step 4: When IAB node 2 attempts to establish an F1 connection with Donor CU, provide the relevant IAB node ID to Donor CU, where the adaptation layer information can carry the newly acquired IAB node ID. After Donor CU receives this ID , Save it in context.

(IAB node1)

Step 5: When IAB node 1 starts up as a UE and establishes an RRC connection with the network, at this time, the DU part of IAB node 2 will assign a unique identifier, such as IAB-RNTI ID, to the UE (ie, IAB node 1), and Construct F1AP: initial uplink RRC message initial UL RRC message, this identifier will be included in the adaptation layer information (optionally, also included in the F1AP message), and then the PDU will be included as a container and sent to the RRC message. Donor, after the donor DU receives it, it forwards it through the F1AP message of the IAB node 2 such as: UL RRC message transfer message to the donor CU-CP instance, and the Donor CU-CP instance resolves the corresponding F1AP message and saves the IAB node 1 As the identifier IAB-RNTI ID of the UE, and complete the subsequent RRC establishment process (via UL / DL IRB 2 RRC message transfer message) according to the received RRC establishment request message (optionally, the RRC establishment message carries the IAB-RNTI ID ).

Step 6: IAB node 1 needs to establish a PDU session to download related configuration parameters of OAM. The Donor CU-CP instance will then initiate a UE context setup process for IAB node 2 (establishing SRB2 and DRB for OAM and activating the AS security mode at the access level). Optionally, the message needs to carry an indicator indicating IAB 2 and the UE is The IAB node enables the IAB 2 to apply functions such as the adaptation layer to the IAB data packets. This information is contained in the RRC message of IAB node 2 in the form of a container and transmitted to IAB node 2 through the corresponding F1AP and SRB. After receiving the UE context setup response, an RRC reconfiguration message will be constructed and passed through the F1AP of IAB node 1 It is transmitted to Donor DU, and then transmitted to the MT part of IAB1 by IAB node 2 to complete the configuration of SRB2 and DRB for OAM. IAB node1 obtains the IAB node identifier from the OAM configuration parameter, and the identifier is unique under each Donor CU.

Step 8: IAB node1 will activate the F1AP and SRB signaling transmission channels for the DU part. Here, the IAB's DU needs to be able to transmit F1AP data packets to a specific SRB of the MT part, such as SRB1, to Donor; also The DU of the IAB can transmit the SRB data packet from the UE to Donor through the specific SRB of the MT part, for example, SRB1 / 2/3. (Note: this step may also be performed after step 5)

Wherein, optionally, the RRC reconfiguration message in step 7 will contain the configuration information of the mapping relationship. For example, for the SRB 1/2/3 signaling from a UE under the IAB1 node, it will be directly mapped to the SRB 1/2 / of the IAB1. 3, and for the F1AP signaling from the IAB1 node, optionally, it is mapped to the SRB1 of the IAB1 or other specific SRB. Then IAB node1 will activate the F1AP and SRB signaling transmission channels for the DU part, as described in step 8.

Step 9: When IAB node 1 attempts to establish an F1 connection with Donor CU, provide the relevant IAB node identifier to Donor CU; where the adaptation layer information can carry the newly obtained IAB node 1 identifier and IAB-RNTI ID, so that the donor CU-CP, based on these adaptation layer information, it can select the correct PDCP / RRC processing unit (IAB node's SRB processing entity), and save the new IAB node1 ID in the corresponding F1AP context for subsequent addressing use.

Step 10: IAB node1 can provide services to the access UE. The SRB bearer of the UE will be transmitted to Donor through the corresponding SRB bearers of IAB node1 and IABnode2, and the F1AP signaling for the UE can also pass through IAB node1. And IAB node 2 specific SRB bearers, which are transmitted to Donor. For the signaling data transmission mechanism, refer to Embodiment 1/2.

In summary, in the signaling transmission method of the embodiment of the present disclosure, when the IAB node sends the target signaling to the target device, the IAB node also includes the unique IAB node identifier of the access IAB node under the IAB Donor CU. The user identifier allocated by the access IAB node to the user equipment and the adaptation layer information of the user equipment's signaling radio bearer identifier are sent to the target device, so that the target device can learn the relevant identification information of the target signaling, and The hopping wireless node correctly performs signaling bearer mapping and reliable transmission to meet the subsequent requirements for serving the UE and data transmission, and improves system management efficiency.

As shown in FIG. 3, a signaling transmission method according to an embodiment of the present disclosure, which is applied to an IAB host, includes:

Step 301a: when the target signaling is uplink signaling, obtain the target signaling according to the adaptation layer information of the target signaling; or

Step 301b: if the target signaling is downlink signaling, generate adaptation layer information for the target signaling, and send the target signaling and the adaptation layer information for the target signaling to a first IAB Node; where,

Here, IAB Donor will receive the uplink signaling according to its adaptation layer information; for downlink signaling, it will generate the adaptation layer information for the downlink signaling, and use the downlink signaling and its The adaptation layer information is sent to a first IAB node, which is an IAB node that directly communicates with the IAB Donor. In this way, it is possible to correctly perform signaling bearer mapping and reliable transmission on each hop wireless node, so as to meet the subsequent needs for serving the UE and data transmission, and improve system management efficiency.

When sending the downlink signaling and its adaptation layer information to the first IAB node, the SRB identification information of the first IAB node will also be sent.

In this embodiment, the IAB Donor mainly includes two parts: a DU part and a CU part. Among them, the IAB Donor will select an applicable CU-CP instance to provide F1AP signaling services 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 includes:

The RRC reconfiguration message carries signaling configuration information.

Optionally, the method further includes:

The RRC reconfiguration message carries signaling configuration information.

It should be noted that a signaling transmission method according to an embodiment of the present disclosure is applied to an IAB host, and the signaling transmission method applied to an IAB node in the previous embodiment will jointly implement multi-hop 5G wireless backhaul node signaling transmission. The implementation manner of the foregoing embodiment of the signaling transmission method applied to the IAB node is applicable to this method, and the same technical effect can also be achieved.

As shown in FIG. 4, a signaling transmission apparatus according to an embodiment of the present disclosure, which is applied to an IAB node, includes:

The sending module 401 is configured to send the target signaling and the adaptation layer information of the target signaling to the target device;

The adaptation layer information further includes a first indication identifier, and the first indication identifier is used to indicate whether the target signaling is a centralized unit-distribution 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;

The first sending submodule is configured to send the target signaling and the adaptation layer information of the target signaling to the target device through the target signaling radio bearer.

Optionally, the sending module further includes:

An adding processing submodule, configured to add target signaling and the adaptation layer information of the target signaling to a protocol data unit PDU, and add a second indication identifier during the radio link control layer processing of the PDU, The second indication identifier is used to indicate whether the PDU includes adaptation layer information of the target signaling;

The first sending sub-module is further configured to:

Sending the PDU to the target device through the target signaling radio bearer.

Optionally, the apparatus further includes:

An obtaining module, configured to obtain a second indication identifier in the received PDU;

A first execution processing module, configured to execute the radio bearer mapping relationship according to the configured signaling and the adaptation layer information if the second indication indicates that the PDU includes the adaptation layer information of the target signaling , Determining the steps of transmitting the target signaling radio bearer used by the IAB;

A second execution processing module, configured to: if the second indication indicates that the PDU does not include the adaptation layer information of the target signaling, after the current network device obtains the adaptation layer information, execute the And a step of determining a target signaling radio bearer of the IAB used for transmission by using the mapping relationship of the signaling radio bearer and the adaptation layer information.

Optionally, the apparatus further includes:

The forwarding module is configured to: if the target signaling is the downlink signaling of the user equipment and the current network equipment is an intermediate IAB node, after obtaining the adaptation layer information in the received PDU, according to the adaptation layer information and the pre-stored information The routing information of the router, and forward the adaptation layer information to the corresponding distribution unit in the current network device.

Optionally, the apparatus further includes:

A sending processing module, configured to pass the corresponding user through the corresponding user if the current network device determines that it is an IAB node connected to the user equipment according to the received adaptation layer information, if the target signaling is the downlink signaling of the user equipment The signaling radio bearer of the device sends the downlink signaling to the user equipment; if the target signaling is F1AP signaling, the F1AP signaling is forwarded to a F1AP processing unit for processing.

Optionally, the apparatus further includes:

A receiving processing module, configured to receive signaling configuration information and activate a transmission channel of F1AP and RRC signaling when the current network device establishes a radio resource control RRC connection with the network as a user equipment; wherein, the signaling configuration information It includes the unique IAB node identifier of the current network device under the IAB host centralized unit.

Optionally, the receiving processing module includes:

The first receiving submodule is configured to receive an RRC reconfiguration message sent by a distribution unit of the host if the current network device is an IAB node that directly communicates with the host, where the RRC reconfiguration message carries the signaling configuration information.

Optionally, the receiving processing module further includes:

The second sending sub-module is configured to send the unique IAB node identifier of the access IAB node under the IAB host centralized unit to the host centralized unit during the process of establishing an F1 connection with the host centralized unit.

Optionally, the receiving processing module includes:

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

Optionally, the receiving processing module further includes:

The third sending submodule is configured to send the unique IAB node identifier of the access IAB node under the IAB host centralized unit and the user identifier assigned by the access IAB node to the user equipment during the process of establishing an F1 connection with the host centralized unit to Host concentration unit.

When sending the target signaling to the target device, the device in the embodiment of the present disclosure further includes the unique IAB node identifier of the target signaling including the access IAB node under the IAB host Donor centralized unit CU, and the access IAB node is the user The user identification allocated by the device and the adaptation layer information of the signaling radio bearer identification of the user equipment are sent to the target device, so that the target device can learn the related identification information of the target signaling and perform the correct operation on each hop wireless node. Signaling bearer mapping and reliable transmission to meet the needs of subsequent service and data transmission for the UE and improve system management efficiency.

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

As shown in FIG. 5, a signaling transmission device according to an embodiment of the present disclosure. The signaling transmission device, which is applied to an IAB host, includes:

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

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 processing module includes:

A first processing submodule, configured to determine a signaling radio bearer based on sending the target signaling and the adaptation layer information of the target signaling, which is determined by the target centralized unit control plane CU-CP instance according to the adaptation layer information The target packet data is summarized by the PDCP processing unit, and the target signaling is obtained through the target PDCP processing unit.

Optionally, the processing module includes:

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

The third processing module is configured to send 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 submodule, configured to add a second indication identifier during the radio link control layer processing of the PDU, where the second indication identifier is used to indicate whether the PDU includes the adaptation layer information of the target signaling ;

The second processing submodule is configured to send the processed PDU to the first IAB node through a corresponding signaling radio bearer.

Optionally, the apparatus further includes:

A first dedicated processing module, configured to establish an RRC connection between the second IAB node and the network as a user equipment, and if the second IAB node communicates directly with the host, the CU-CP instance saves the IAB of the second IAB node The node identifier serves as the temporary identifier of the cell wireless network of the user equipment, and completes the RRC establishment process and activates the transmission channel of F1AP and RRC signaling.

Optionally, the apparatus further includes:

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

A first context establishment response module, for the distribution unit to feed back a user equipment context establishment response message to the CU-CP instance;

A first reconfiguration processing module, configured to, after the CU-CP instance receives the user equipment context establishment response message, construct an RRC reconfiguration message, and send the RRC reconfiguration through the F1AP of the second IAB node Message to the distribution unit;

A first reconfiguration sending module, configured to send the RRC reconfiguration message to the second IAB node by the distribution unit;

The RRC reconfiguration message carries signaling configuration information.

Optionally, the apparatus further includes:

A second dedicated processing module, configured to establish an RRC connection between the third IAB node and the network as a user equipment, and if the third IAB node communicates indirectly with the host, the distribution unit passes the received PDU through the fourth IAB The F1AP of the node is forwarded to the CU-CP instance, and the fourth IAB node is the parent node of the third IAB node;

A third dedicated processing module 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 F1AP and RRC signaling transmission channels .

Optionally, the apparatus further includes:

A second context establishment request module, configured to send, by the CU-CP instance, a user equipment context establishment request message to a distribution unit, where the user equipment context establishment request message carries fourth instruction information, where the fourth instruction information indicates the The current user equipment of the fourth node is an IAB node;

A second context establishment response module, for the distribution unit to send an RRC connection establishment message carrying the fourth indication information to the third IAB node, and feedback a user equipment context establishment response message to the CU-CP Instance

A second reconfiguration processing module, configured for the CU-CP instance to construct an RRC reconfiguration message after receiving the user equipment context establishment response message, and send the RRC reconfiguration through the F1AP of the third IAB node Message to the distribution unit;

A second reconfiguration sending module, configured to send the RRC reconfiguration message to the fourth IAB node by the distribution unit, so that the fourth IAB node forwards the RRC reconfiguration message to the third IAB node; among them,

The RRC reconfiguration message carries signaling configuration information.

The apparatus according to the embodiment of the present disclosure, for the received uplink signaling, it will obtain the uplink signaling according to its adaptation layer information; for the downlink signaling, it will generate the adaptation layer information for the downlink signaling, and The command and its adaptation layer information are sent to a first IAB node, which is an IAB node that directly communicates with the IAB Donor. In this way, it is possible to correctly perform signaling bearer mapping and reliable transmission on each hop wireless node, so as to meet the subsequent needs for serving the UE and data transmission, and improve system management efficiency.

It should be noted that the device applies the above-mentioned signaling transmission method applied to the IAB host, and the implementation manner of the foregoing embodiment of applying the signaling transmission method of the IAB host is applicable to the device, and the same technical effect can also be achieved.

As shown in FIG. 6, a network device according to an embodiment of the present disclosure. The network device is an IAB node and includes: a transceiver 610, a memory 620, a processor 630, and stored in the memory 620 and may be processed in the process. Program running on the processor 630;

Optionally, the processor is further configured to:

The transceiver is further configured to:

Sending the PDU to the target device through the target signaling radio bearer.

Optionally, the transceiver is further configured to:

Obtaining 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 the process of attempting to establish an F1 connection with the host centralized unit, the unique IAB node identifier of the access IAB node under the IAB host centralized unit and the user ID assigned by the access IAB node to the user equipment are sent to the host centralized unit.

In FIG. 6, the bus architecture may include any number of interconnected buses and bridges, and one or more processors specifically represented by the processor 630 and various circuits of the memory represented by the memory 620 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art, so they are not described further herein. The bus interface provides an interface. The transceiver 610 may be multiple elements, including a transmitter and a transceiver, providing a unit for communicating with various other devices 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 when performing operations.

As shown in FIG. 7, a network device according to an embodiment of the present disclosure. The network device is an IAB host and includes: a transceiver 710, a memory 720, a processor 730, and stored in the memory 720 and may be processed in the process. Programs running 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 processor is further configured to: the CU-CP instance 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 F1AP and RRC signaling transmission channels .

Optionally, the transceiver is further configured to:

The RRC reconfiguration message carries signaling configuration information.

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

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

Optionally, the processor 730 may be a CPU, an ASIC, an FPGA, or a CPLD.

Another embodiment of the present disclosure also provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and the computer program, when executed by a processor, implements information applied to an IAB node as described above. Order the steps in the transfer method.

Another embodiment of the present disclosure also provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the information implemented in the IAB host as described above is implemented. Order the steps in the transfer method.

Computer-readable media includes permanent and non-persistent, removable and non-removable media. Information storage can be accomplished by any method or technology. 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), and read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, read-only disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, Magnetic tape cartridges, magnetic tape storage or other magnetic storage devices or any other non-transmitting medium may be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include temporary computer-readable media, such as modulated data signals and carrier waves.

It should further be noted that the user equipment described in this specification includes, but is not limited to, smart phones, tablet computers, and the like, and many of the described functional components are called modules, so as to emphasize the independence of their implementation methods more specifically.

In the embodiments of the present disclosure, the modules may be implemented by software so as to be executed by various types of processors. For example, an identified executable code module may include one or more physical or logical blocks of computer instructions, which may be constructed, for example, as an object, procedure, or function. Nevertheless, the executable code of the identified modules need not be physically located together, but may include different instructions stored in different bits. When these instructions are logically combined, they constitute a module and implement the provisions of the module purpose.

In fact, an executable code module can be a single instruction or many instructions, and can even be distributed across multiple different code segments, among different programs, and across multiple memory devices. As such, operational data may be identified within a module, and may be implemented 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 in different locations (including on different storage devices), and at least partly may exist on the system or network only as electronic signals.

When the module can be implemented by software, the level of hardware technology in the related technology is taken into consideration, so the module that can be implemented by software can build corresponding hardware circuits to realize the corresponding without considering the cost. Function, the hardware circuit includes a conventional very large scale integration (VLSI) circuit or a gate array, and a semiconductor or other discrete components in related technologies such as logic chips, transistors, and the like. Modules can also be implemented with programmable hardware devices, such as field programmable gate arrays, programmable array logic, and programmable logic devices.

The above-mentioned exemplary embodiments are described with reference to the drawings. Many different forms and embodiments are feasible without departing from the spirit and teachings of the present disclosure. Therefore, the present disclosure should not be constructed as the exemplary embodiments proposed herein. limits. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will convey the scope of the disclosure to those skilled in the art. In these drawings, component dimensions and relative dimensions may be exaggerated for clarity. The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include those plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprising" and / or "including" when used in this specification indicate the presence of stated features, integers, steps, operations, components and / or components, but do not exclude one or more other The presence or addition of features, integers, steps, operations, components, components, and / or their families. Unless stated otherwise, a range of values, when stated, includes the upper and lower limits of the range and any subranges therebetween.

The above is an optional implementation of the present disclosure. It should be noted that for those of ordinary skill in the art, without departing from the principles described in the present disclosure, several improvements and retouches can be made. These improvements and retouches It should also be regarded as the scope of protection of this disclosure.

Claims

A signaling transmission method applied to an integrated access backhaul IAB node, including:

Sending the target signaling and the adaptation layer information of the target signaling to the target device;

The adaptation layer information includes the unique IAB node identifier of the access IAB node under the IAB host centralized unit, the user identifier allocated by the access IAB node to the user equipment, and the signaling radio bearer identifier of the user equipment.
The signaling transmission method according to claim 1, wherein the adaptation layer information further comprises a first indication identifier, the first indication identifier being used to indicate whether the target signaling is a centralized unit-distributed unit interface application Protocol F1AP signaling.
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:

Determining the target signaling radio bearer of the IAB used for transmission according to the configured signaling radio bearer mapping relationship and the adaptation layer information;

Sending the target signaling and the adaptation layer information of the target signaling to the target device through the target signaling radio bearer.
The signaling transmission method according to claim 3, 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, further comprising: :

Adding the target signaling and the adaptation layer information of the target signaling to the protocol data unit PDU, and in the process of performing radio link control layer processing on the PDU, adding a second indication identifier, the second indication identifier being used Adaptation layer information for indicating whether the PDU includes 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:

Sending the PDU to the target device through the target signaling radio bearer.
The signaling transmission method according to claim 3, before the step of sending the target signaling and the adaptation layer information of the target signaling to the target device, further comprising:

Obtaining a second indication identifier in the received PDU;

If the second indication identifier indicates that the PDU includes the adaptation layer information of the target signaling, performing the determining of the target of the IAB used for transmission according to the configured signaling radio bearer mapping relationship and the adaptation layer information Steps for signaling radio bearer;

If the second indication identifier indicates that the PDU does not include the adaptation layer information of the target signaling, then after the current network device obtains the adaptation layer information, execute the radio bearer mapping relationship according to the configured signaling and The adaptation layer information determines the steps of transmitting the target signaling radio bearer of the IAB used.
The signaling transmission method according to claim 1, before the step of sending the target signaling and the adaptation layer information of the target signaling to the target device, further comprising:

If the target signaling is the downlink signaling of the user equipment, and the current network equipment is an intermediate IAB node, after obtaining the adaptation layer information in the received PDU, forward it according to the adaptation layer information and pre-stored routing information. The adaptation layer information is sent to a corresponding distribution unit in the current network device.
The signaling transmission method according to claim 1, further comprising:

In the case that the current network device determines that it is an IAB node connected to the user equipment according to the received adaptation layer information, if the target signaling is the downlink signaling of the user equipment, the signaling radio bearer is transmitted through the corresponding user equipment. Sending the downlink signaling to the user equipment; if the target signaling is F1AP signaling, the F1AP signaling is forwarded to a F1AP processing unit for processing.
The signaling transmission method according to claim 1, further comprising:

When the current network device serves as a user equipment to establish a radio resource control RRC connection with the network, it receives signaling configuration information and activates the transmission channel of F1AP and RRC signaling; wherein the signaling configuration information includes the current network device in the IAB The unique IAB node identifier under the host centralized unit.
The signaling transmission method according to claim 8, wherein the signaling configuration information further comprises a configured signaling radio bearer mapping relationship.
The signaling transmission method according to claim 8, wherein the step of receiving signaling configuration information comprises:

If the current network device is an IAB node that directly communicates with the host, it receives an RRC reconfiguration message sent by the distribution unit of the host, and the RRC reconfiguration message carries the signaling configuration information.
The signaling transmission method according to claim 10, after the step of receiving signaling configuration information, further comprising:

In the process of trying to establish an F1 connection with the host centralized unit, the unique IAB node identifier of the IAB node under the IAB host centralized unit is sent to the host centralized unit.
The signaling transmission method according to claim 8, wherein the step of receiving signaling configuration information comprises:

If the current network device is an IAB node that indirectly communicates with the host, it receives an RRC reconfiguration message sent by a previous IAB node of the current network device, and the RRC reconfiguration message carries the signaling configuration information.
The signaling transmission method according to claim 12, after the step of receiving signaling configuration information, further comprising:

In the process of establishing an F1 connection with the host centralized unit, the unique IAB node identifier of the access IAB node under the IAB host centralized unit and the user ID assigned by the access IAB node to the user equipment are sent to the host centralized unit.
A signaling transmission method applied to an IAB host, including:

When the target signaling is uplink signaling, obtaining the target signaling according to the adaptation layer information of the target signaling; or

When the target signaling is 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; where ,

The adaptation layer information includes the unique IAB node identifier of the access IAB node under the IAB host centralized unit, the user identifier allocated by the access IAB node to the user equipment, and the signaling radio bearer identifier of the user equipment.
The signaling transmission method according to claim 14, wherein the adaptation layer information further comprises a first indication identifier, and the first indication identifier is used to indicate whether the target signaling is F1AP signaling.
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:

Based on the signaling radio bearer that sends the target signaling and the adaptation layer information of the target signaling, the target centralized unit control plane CU-CP instance determines the target packet data summary PDCP processing unit based on the adaptation layer information. And obtaining the target signaling through a target PDCP processing unit.
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 a first IAB node comprises:

The CU-CP instance obtains a PDU including the target signaling and the adaptation layer information of the target signaling through a processing unit corresponding to the target signaling, and sends the PDU to the distribution unit through an F1AP message. The F1AP message carries the signaling radio bearer identifier of the first IAB node;

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

In the process of performing radio link control layer processing on the PDU, adding a second indication identifier, where the second indication identifier is used to indicate whether the PDU includes the adaptation layer information of the target signaling;

Send the processed PDU to the first IAB node through the corresponding signaling radio bearer.
The signaling transmission method according to claim 14, further comprising:

In the case where the second IAB node serves as the user equipment to establish an RRC connection with the network, if the second IAB node directly communicates with the host, the CU-CP instance saves the IAB node identifier of the second IAB node as the cell radio of the user equipment. The network temporarily identifies and completes the RRC establishment process and activates the F1AP and RRC signaling transmission channels.
The signaling transmission method according to claim 19, further comprising:

Sending, by the CU-CP instance, a user equipment context establishment request message to a distribution unit, the user equipment context establishment request message carrying third indication information, where the third indication information indicates that the current user equipment of the distribution unit is an IAB node;

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

After receiving the user equipment context establishment response message, the CU-CP instance constructs an RRC reconfiguration message, and sends the RRC reconfiguration message to the distribution unit through the F1AP of the second IAB node;

Sending, by the distribution unit, the RRC reconfiguration message to the second IAB node;

The RRC reconfiguration message carries signaling configuration information.
The signaling transmission method according to claim 14, further comprising:

In the case where the third IAB node serves as a user equipment to establish an RRC connection with the network, if the third IAB node communicates indirectly with the host, the distribution unit forwards the received PDU to the CU-CP through the F1AP of the fourth IAB node For example, the fourth IAB node is a parent node of the third IAB node;

The CU-CP instance stores the IAB node identifier of the third IAB node as the user identifier of the user equipment according to the F1AP, completes the RRC establishment process, and activates the F1AP and RRC signaling transmission channels.
The signaling transmission method according to claim 21, further comprising:

The CU-CP instance sends a user equipment context establishment request message to a distribution unit, 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 feedbacks a user equipment context establishment response message to the CU-CP instance;

After receiving the user equipment context establishment response message, the CU-CP instance constructs an RRC reconfiguration message, and sends the RRC reconfiguration message to the distribution unit through the F1AP of the third IAB node;

Sending, 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 RRC reconfiguration message carries signaling configuration information.
A signaling transmission device applied to an IAB node includes:

A sending module, configured to send the target signaling and the adaptation layer information of the target signaling to the target device;

The adaptation layer information includes the unique IAB node identifier of the access IAB node under the IAB host centralized unit, the user identifier allocated by the access IAB node to the user equipment, and the signaling radio bearer identifier of the user equipment.
A signaling transmission device applied to an IAB host includes:

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

When the target signaling is 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; where ,

The adaptation layer information includes: the unique IAB node identifier of the access IAB node under the IAB host centralized unit, the user identifier assigned to the user equipment by the access IAB node, and the signaling radio bearer identifier of the user equipment.
A network device, where the network device is an IAB node, includes: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; wherein,

The transceiver is configured to send the target signaling and the adaptation layer information of the target signaling to the target device;

The adaptation layer information includes the unique IAB node identifier of the access IAB node under the IAB host centralized unit, the user identifier allocated by the access IAB node to the user equipment, and the signaling radio bearer identifier of the user equipment.
The network device according to claim 25, wherein the adaptation layer information further comprises a first indication identifier, and the first indication identifier is used to indicate whether the target signaling is a centralized unit-distributed unit interface application protocol F1AP Signaling.
The network device according to claim 25, wherein the processor is further configured to:

Determining the target signaling radio bearer of the IAB used for transmission according to the configured signaling radio bearer mapping relationship and the adaptation layer information;

The transceiver is further configured to send the target signaling and the adaptation layer information of the target signaling to the target device through the target signaling radio bearer.
The network device according to claim 27, wherein the processor is further configured to:

Adding the target signaling and the adaptation layer information of the target signaling to the protocol data unit PDU, and in the process of performing radio link control layer processing on the PDU, adding a second indication identifier, the second indication identifier being used Adaptation layer information for indicating whether the PDU includes target signaling;

The transceiver is further configured to:

Sending the PDU to the target device through the target signaling radio bearer.
The network device according to claim 27, wherein the transceiver is further configured to:

Obtaining a second indication identifier in the received PDU;

The processor is further configured to:

If the second indication identifier indicates that the PDU includes the adaptation layer information of the target signaling, performing the determining of the target of the IAB used for transmission according to the configured signaling radio bearer mapping relationship and the adaptation layer information Steps for signaling radio bearer;

If the second indication identifier indicates that the PDU does not include the adaptation layer information of the target signaling, then after the current network device obtains the adaptation layer information, execute the radio bearer mapping relationship according to the configured signaling and The adaptation layer information determines the steps of transmitting the target signaling radio bearer of the IAB used.
The network device according to claim 25, wherein the processor is further configured to:

If the target signaling is the downlink signaling of the user equipment, and the current network equipment is an intermediate IAB node, after obtaining the adaptation layer information in the received PDU, forward it according to the adaptation layer information and pre-stored routing information. The adaptation layer information is sent to a corresponding distribution unit in the current network device.
The network device according to claim 25, wherein the transceiver is further configured to:

In the case that the current network device determines that it is an IAB node connected to the user equipment according to the received adaptation layer information, if the target signaling is the downlink signaling of the user equipment, the signaling radio bearer is transmitted through the corresponding user equipment. Sending the downlink signaling to the user equipment; if the target signaling is F1AP signaling, the F1AP signaling is forwarded to a F1AP processing unit for processing.
The network device according to claim 25, wherein the processor is further configured to:

When the current network device serves as a user equipment to establish a radio resource control RRC connection with the network, it receives signaling configuration information and activates the transmission channel of F1AP and RRC signaling; wherein the signaling configuration information includes the current network device in the IAB The unique IAB node identifier under the host centralized unit.
The network device according to claim 32, wherein the signaling configuration information further comprises a configured signaling radio bearer mapping relationship.
The network device according to claim 32, wherein the transceiver is further configured to:

If the current network device is an IAB node that directly communicates with the host, it receives an RRC reconfiguration message sent by the distribution unit of the host, and the RRC reconfiguration message carries the signaling configuration information.
The network device according to claim 34, wherein the transceiver is further configured to:

In the process of trying to establish an F1 connection with the host centralized unit, the unique IAB node identifier of the IAB node under the IAB host centralized unit is sent to the host centralized unit.
The network device according to claim 32, wherein the transceiver is further configured to:

If the current network device is an IAB node that indirectly communicates with the host, it receives an RRC reconfiguration message sent by a previous IAB node of the current network device, and the RRC reconfiguration message carries the signaling configuration information.
The network device according to claim 36, wherein the transceiver is further configured to:

In the process of establishing an F1 connection with the host centralized unit, the unique IAB node identifier of the access IAB node under the IAB host centralized unit and the user ID assigned by the access IAB node to the user equipment are sent to the host centralized unit.
A network device, the network device being an IAB host, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; wherein,

The processor is configured to obtain the target signaling according to the adaptation layer information of the target signaling when the target signaling is uplink signaling; or

When the target signaling is 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; where ,

The adaptation layer information includes the unique IAB node identifier of the access IAB node under the IAB host centralized unit, the user identifier allocated by the access IAB node to the user equipment, and the signaling radio bearer identifier of the user equipment.
The network device according to claim 38, wherein the adaptation layer information further includes a first indication identifier, and the first indication identifier is used to indicate whether the target signaling is F1AP signaling.
The network device according to claim 38, wherein the processor is further configured to:

Based on the signaling radio bearer that sends the target signaling and the adaptation layer information of the target signaling, the target centralized unit control plane CU-CP instance determines the target packet data summary PDCP processing unit based on the adaptation layer information. And obtaining the target signaling through a target PDCP processing unit.
The network device according to claim 38, wherein the transceiver is further configured to:

The CU-CP instance obtains a PDU including the target signaling and the adaptation layer information of the target signaling through a processing unit corresponding to the target signaling, and sends the PDU to the distribution unit through an F1AP message. The F1AP message carries the signaling radio bearer identifier of the first IAB node;

The distribution unit sends 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.
The network device according to claim 41, wherein the processor is further configured to:

In the process of performing radio link control layer processing on the PDU, adding a second indication identifier, where the second indication identifier is used to indicate whether the PDU includes the adaptation layer information of the target signaling;

The transceiver is further configured to send the processed PDU to the first IAB node through a corresponding signaling radio bearer.
The network device according to claim 38, wherein the processor is further configured to:

In the case where the second IAB node serves as the user equipment to establish an RRC connection with the network, if the second IAB node directly communicates with the host, the CU-CP instance saves the IAB node identifier of the second IAB node as the cell radio of the user equipment. The network temporarily identifies and completes the RRC establishment process and activates the F1AP and RRC signaling transmission channels.
The network device according to claim 43, wherein the transceiver is further configured to:

Sending, by the CU-CP instance, a user equipment context establishment request message to a distribution unit, the user equipment context establishment request message carrying third indication information, where the third indication information indicates that the current user equipment of the distribution unit is an IAB node;

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

After receiving the user equipment context establishment response message, the CU-CP instance constructs an RRC reconfiguration message, and sends the RRC reconfiguration message to the distribution unit through the F1AP of the second IAB node;

Sending, by the distribution unit, the RRC reconfiguration message to the second IAB node;

The RRC reconfiguration message carries signaling configuration information.
The network device according to claim 38, wherein the transceiver is further configured to:

In the case where the third IAB node serves as a user equipment to establish an RRC connection with the network, if the third IAB node communicates indirectly with the host, the distribution unit forwards the received PDU to the CU-CP through the F1AP of the fourth IAB node For example, the fourth IAB node is a parent node of the third IAB node;

The processor is further configured to: the CU-CP instance saves the IAB node identifier of the third IAB node as the user identifier of the user equipment according to the F1AP, completes the RRC establishment process, and activates the F1AP and RRC signaling transmission channels. .
The network device according to claim 45, wherein the transceiver is further configured to:

The CU-CP instance sends a user equipment context establishment request message to a distribution unit, 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 feedbacks a user equipment context establishment response message to the CU-CP instance;

After receiving the user equipment context establishment response message, the CU-CP instance constructs an RRC reconfiguration message, and sends the RRC reconfiguration message to the distribution unit through the F1AP of the third IAB node;

Sending, 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 RRC reconfiguration message carries signaling configuration information.
A computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps in the method according to any one of claims 1 to 13.
A computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps in the method according to any one of claims 14 to 22.