CN110662297B

CN110662297B - Signaling processing method, node and device

Info

Publication number: CN110662297B
Application number: CN201810714019.0A
Authority: CN
Inventors: 张大钧; 刘佳敏
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-06-29
Filing date: 2018-06-29
Publication date: 2022-07-22
Anticipated expiration: 2038-06-29
Also published as: WO2020001141A1; CN110662297A

Abstract

The invention discloses a signaling processing method, a node and a device, comprising the following steps: the MT serving the IAB configures the adaptation layer of the signaling bearer and completes the mapping to the specific SRBx of the present node. The invention provides a scheme aiming at multi-hop 5G wireless backhaul node signaling bearer transmission and mapping, and can meet the requirement of providing stable signaling data transmission service for users under different wireless backhaul network architectures. Furthermore, the signaling bearer processing scheme under the wireless backhaul network architecture can ensure that the signaling bearer mapping of the wireless backhaul node can be better performed on the premise of minimal modification to the protocol stack, provide stable data transmission service for the UE, and reduce the complexity of the wireless backhaul system.

Description

Signaling processing method, node and device

Technical Field

The present invention relates to the field of wireless technologies, and in particular, to a signaling processing method, node, and apparatus.

Background

Fig. 1 is a schematic diagram of a 5G communication network structure, and as shown in the figure, in a 5G mobile communication system, nodes on a network side are mostly connected by a wire, that is, a gNB (NR NodeB, next generation base station; NR: next generation Radio) is connected by a wire link, and the gNB and core network nodes, such as an AMF (Access and Mobility Management Function), a UPF (User Plane Function), and the like, are connected by a wire link.

And ng-eNB: node providing E-UTRA user plane and control plane protocols to the UE, and connected view the NG interface to the 5GC (next generation base station: user plane and control plane protocols of network nodes supporting E-UTRA terminate to the user equipment and connect with 5G core network through next generation interface E-UTRA: Evolution-Universal Terrestrial Radio Access, evolved Global Terrestrial Radio Access)

Fig. 2 is a schematic diagram of a Protocol stack architecture of a user plane and a Control plane, as shown in the figure, in a 5G wireless Protocol architecture, a 5G basic user plane Protocol layer includes an SDAP (Service Data attachment Protocol), a PDCP (Packet Data Convergence Protocol), an RLC (Radio Link Control), a MAC (Media Access Control), and a PHY (Physical layer). The Control plane protocol layer includes NAS (Non Access Stratum ), RRC (Radio Resource Control), PDCP, RLC, MAC, and PHY.

Fig. 3 is a schematic diagram of an IAB (Integrated Access and Backhaul) control plane network architecture a, fig. 4 is a schematic diagram of an IAB control plane network architecture b, and fig. 5 is a schematic diagram of an IAB control plane network architecture c, as shown in the architecture a, an RRC message from a UE (User Equipment) is mapped onto a special signaling bearer of an IAB node (node) through an F1AP (F1 Application Protocol ) message, where adaptation layer information needs to be added; in the structure b, an RRC message from an MT (Mobile Terminal) is mapped to a signaling bearer of an IAB node of a previous hop through an F1AP message, where adaptation layer information needs to be added; in the structure c, the F1AP message from the DU (Distributed Unit) part of the IAB node is mapped to the signaling bearer of the IAB node.

The prior art is not sufficient in that there is no scheme for multi-hop 5G wireless backhaul node signaling bearer transport and mapping.

Disclosure of Invention

The invention provides a signaling processing method, a node and a device, which are used for solving the problem that no scheme for multi-hop 5G wireless backhaul node signaling bearer transmission and mapping exists in the prior art.

The embodiment of the invention provides a signaling processing method, which comprises the following steps:

when transmitting the uplink signaling:

after a DU part of a service IAB node generates an F1AP message, selecting a corresponding MT part according to a preset strategy, wherein the service IAB node is an IAB node for providing access service for UE;

the MT part of the service IAB node completes the mapping to the specific SRB signaling bearer of the corresponding IAB;

the service IAB node transmits the signaling from the mapped bearer;

and/or the presence of a gas in the atmosphere,

when downlink signaling is transmitted:

the MT part of the service IAB node removes RLC, MAC and PHY layer data of a special SRB data packet sent by the last hop of the IAB node;

the MT part of the service IAB node carries out decryption processing when judging as the last hop IAB node according to the IAB node id information of the adaptation layer;

the MT part of the service IAB node forwards the decrypted PDU to the corresponding DU part for processing;

the DU part of the service IAB node sends the processed F1AP message to the corresponding processing unit for subsequent processing;

and/or the presence of a gas in the gas,

when configuring the signaling bearer:

when a service IAB node is started up and RRC connection is established with a network, a PDU session is established to download OAM configuration parameters;

when receiving the radio parameter configuration for the new SRBx transmitted to the MT part of the service IAB node by the intermediate IAB node, finishing the configuration of the SRB 2/the new SRBx and DRB for OAM;

the service IAB node acquires the IAB node identifier from the OAM configuration parameters, and the identifier is unique under the CU part of each Donor IAB node;

the serving IAB node activates the F1AP signaling transport channel for the DU part of the serving IAB node to transmit the F1AP packet to the donorab node over the specific SRB of the MT part of the serving IAB node.

when transmitting the uplink signaling:

a DU part of an intermediate IAB node receives a signaling data packet transmitted by other IAB nodes from an SRB, wherein the intermediate IAB node is a relay IAB node between an IAB node providing access service for UE and an IAB node providing access to a core network;

after removing RLC, MAC and PHY layer data of the data packet in the DU part of the middle IAB node, forwarding the data packet to a corresponding MT part selected according to a preset strategy;

the MT part of the intermediate IAB node completes the mapping to the specific SRB signaling bearer of the corresponding IAB according to the mapping relation preserved in advance;

the intermediate IAB node transmits the signaling from the mapped bearer;

and/or the presence of a gas in the atmosphere,

when transmitting the downlink signaling:

the MT part of the middle IAB node receives special SRB data packets transmitted by DU parts of other IAB nodes or Donor IAB nodes;

after removing RLC, MAC and PHY layer data of a data packet, an MT part of the middle IAB node forwards the data packet to a corresponding DU part according to the information of an adaptation layer and the pre-stored routing information;

the DU part of the middle IAB node completes the mapping to the SRB signaling bearer corresponding to the middle IAB node according to the mapping relation stored in advance;

the DU part of the middle IAB node processes RLC, MAC and PHY layers of the data packet and then sends the data packet to the MT part of the next hop IAB node on the SRB signaling bearer of the corresponding IAB node;

and/or the presence of a gas in the gas,

when configuring the signaling bearer:

when an intermediate IAB node is started up and establishes RRC connection with a network, acquiring an identifier of the IAB node from OAM configuration parameters, wherein the identifier is unique under the CU part of each Donor IAB node;

the intermediate IAB node activates the F1AP signaling channel for the DU part to transmit the F1AP packet to the DonorIAB node through the specific SRB of the MT part of the intermediate IAB node; or the like, or a combination thereof,

when a service IAB node is started up and establishes RRC connection with a network, a DU part of an intermediate IAB node allocates a unique identifier in the service IAB node for the service IAB node and constructs an F1AP message containing the identifier;

the F1AP message is sent to the DU part of the donoraib node via the special SRBx of the intermediate IAB node;

when the CU-CP instance of the donorab node constructs an RRC reconfiguration message carrying the radio parameter configuration for the new SRBx and transmits it to the DU part of the donorab node through F1AP of the intermediate IAB node, the radio parameter configuration for the new SRBx is transmitted to the MT part of the serving IAB node.

when transmitting the uplink signaling:

a DU part of a Donor IAB node receives a signaling PDU transmitted by other IAB nodes from an SRB, wherein the Donor IAB node is a relay IAB node connected with an IAB node providing an access core network;

a DU part of a Donor IAB node transmits the PDU to a CU-CP example corresponding to the signaling bearer of a first hop IAB node, or after finding out the pre-selected and stored signaling bearer context information according to adaptation layer information, transmits the PDU to the CU-CP example corresponding to the signaling bearer of the first hop IAB node through corresponding SCTP association according to the mapping relation of the found corresponding CU-CP example, wherein the first hop IAB node is an IAB node providing access to a core network;

and/or the presence of a gas in the atmosphere,

when transmitting the downlink signaling:

the DU entity of the Donor IAB node receives the F1AP information;

after RLC/MAC/PHY processing is carried out on the signaling PDU in the F1AP information, the signaling PDU is sent to an MT part of a first-hop IAB node;

and/or the presence of a gas in the atmosphere,

when configuring the signaling bearer:

when the IAB node is started and establishes RRC connection with a network, a DU entity of the Donor IAB node selects a CU-CP example of the Donor IAB node to provide signaling service of F1AP for the CU-CP example;

the CU-CP example of the Donor IAB node saves the identification of the IAB node as the identification CRNTI ID of the UE and completes the corresponding RRC establishment process;

a CU-CP example of a Donor IAB node initiates a UE context establishment process;

after receiving the UE context establishment response, the CU-CP instance of the Donor IAB node constructs an RRC reconfiguration message, transmits the RRC reconfiguration message to a DU entity of the Donor IAB node through F1AP of the IAB node and transmits the DU entity to an MT part of the IAB node so as to complete the configuration of SRB 2/new SRBx and DRB for OAM;

or the like, or a combination thereof,

after receiving the F1AP message sent by the intermediate IAB node through the special SRBx of the intermediate IAB node, the DU part of the Donor IAB node forwards the message to the CU-CP example of the Donor IAB node through the F1AP message of the intermediate IAB node, wherein the F1AP message contains a unique identifier which is allocated to the service IAB node by the DU part of the intermediate IAB node when the service IAB node is started to establish RRC connection with a network;

after the CU-CP instance of the Donor IAB node resolves the corresponding F1AP message, saving the identifier in the F1AP message as the identifier of the UE;

the CU-CP example of the Donor IAB node completes the subsequent RRC establishment process according to the received RRC establishment request message;

a CU-CP example of a Donor IAB node initiates a UE context setup process aiming at an intermediate IAB node after a service IAB node establishes a PDU session to download OAM configuration parameters; or, the CU part of the Donor IAB selects a CU-CP instance of the Donor IAB aiming at the service IAB and initiates a UE context setup process aiming at the service IAB, informs the DU part of the Donor IAB to establish context information aiming at the service IAB, and carries an indicator to indicate the DU part of the Donor IAB to be the IAB;

after the CU-CP instance of the donoraib node receives the UE context setup response, it constructs an RRC reconfiguration message carrying radio parameter configuration for the new SRBx, and transmits it to the DU part of the donoraib node through F1AP of the intermediate IAB node.

In practice, the F1AP information is: after a UE RRC/F1AP processing unit corresponding to a CU-CP instance of a Donor IAB node is generated, carrying out security encryption operation by a special SRB processing unit of a service IAB node corresponding to the UE and adding adaptation layer information, and then sending the security encryption operation to a DU entity of the Donor IAB node through F1AP information in a container mode, wherein the F1AP information comprises identification information of a special SRB;

the DU entity of the Donor IAB node transfers the signaling PDU in the F1AP information to the corresponding SRB bearing for RLC/MAC/PHY processing according to the identification information of the special SRB;

or the like, or, alternatively,

the F1AP information is: after a UE RRC/F1AP processing unit corresponding to a CU-CP instance of a Donor IAB node generates a signaling PDU of the UE, after a security encryption operation is carried out by a special SRB processing unit of a service IAB node corresponding to the UE, the signaling PDU is sent to a DU entity of the Donor IAB node through an F1AP message of the service IAB node in a container mode, and the F1AP message contains identification information of an SRB of the UE and an IAB-RNTI ID;

and the DU entity of the Donor IAB node constructs adaptation layer information carried by the UE signaling according to the received F1AP information, maps the special SRB carrying of the first-hop IAB signaling according to the stored signaling carrying context information of the UE service IAB node, and sends the mapping to the MT part of the first-hop IAB node on the corresponding SRB carrying after RLC/MAC/PHY processing.

when transmitting the uplink signaling:

a CU-CP instance corresponding to a first hop IAB node signaling bearer receives PDUs transmitted by DU parts of other IAB nodes, wherein the first hop IAB node is an IAB node providing access to a core network;

the corresponding CU-CP example addresses the PDU to a corresponding processing unit for decryption according to the adaptation layer information;

the decrypted PDU is addressed to a corresponding UE RRC/F1AP processing entity through F1AP id;

and/or the presence of a gas in the gas,

when downlink signaling is transmitted:

and the MT part of the first-hop IAB receives the signaling PDU which is sent by the DU entity of the Donor IAB and is subjected to RLC/MAC/PHY processing.

An embodiment of the present invention provides a serving IAB node, including:

a processor for reading the program in the memory and executing the following processes:

when transmitting the uplink signaling:

completing the mapping to the specific SRB signaling bearer of the corresponding IAB in the MT part of the service IAB node;

a transceiver for receiving and transmitting data under the control of the processor, performing the following processes:

transmitting signaling from the mapped bearer;

and/or the presence of a gas in the gas,

when transmitting the downlink signaling:

removing RLC, MAC and PHY layer data of a special SRB data packet sent by the last hop of IAB node from the MT part of the service IAB node;

when the MT part serving the IAB node judges as the last hop IAB node according to the IAB node id information of the adaptation layer, decryption processing is carried out;

the MT part of the service IAB node forwards the decrypted PDU to a corresponding DU part for processing;

the DU part of the service IAB node sends the processed F1AP message to a corresponding processing unit for subsequent processing;

a transceiver for receiving and transmitting data under the control of the processor;

and/or the presence of a gas in the gas,

a processor for reading the program in the memory, performing the following processes:

when configuring the signaling bearer:

activating, at the serving IAB node, an F1AP signaling transport channel for the DU part of the serving IAB node to transmit the F1AP packet to the donorab node through the specific SRB of the MT part of the serving IAB node;

a transceiver for receiving and transmitting data under the control of the processor.

An embodiment of the present invention provides an intermediate IAB node, including:

when transmitting the uplink signaling:

receiving a signaling data packet transmitted from an SRB by other IAB nodes at a DU part of an intermediate IAB node, wherein the intermediate IAB node is a relay IAB node between an IAB node providing access service for UE and an IAB node providing access to a core network;

after removing RLC, MAC and PHY layer data of a data packet in a DU part of the middle IAB node, forwarding the data packet to a corresponding MT part selected according to a preset strategy;

the MT part of the intermediate IAB node completes the mapping to the specific SRB signaling bearer of the corresponding IAB according to the mapping relation stored in advance;

transmitting signaling from the mapped bearer;

and/or the presence of a gas in the atmosphere,

when transmitting the downlink signaling:

receiving special SRB data packets transmitted by DU parts of other IAB nodes or Donor IAB nodes at the MT part of the middle IAB node;

after removing RLC, MAC and PHY layer data of a data packet in an MT part of an intermediate IAB node, forwarding the data packet to a corresponding DU part according to the information of an adaptation layer and the pre-stored routing information;

the DU part of the intermediate IAB node completes the mapping to the SRB signaling bearer corresponding to the intermediate IAB node according to the mapping relation preserved in advance;

after RLC, MAC and PHY layer processing is carried out on a data packet in a DU part of the middle IAB node, the data packet is sent to an MT part of the next-hop IAB node on an SRB signaling bearer of the corresponding IAB node;

and/or the presence of a gas in the atmosphere,

when configuring the signaling bearer:

when the intermediate IAB node is started up and establishes RRC connection with the network, acquiring an identifier of the IAB node from OAM configuration parameters, wherein the identifier is unique under the CU part of each Donor IAB node;

activating a F1AP signaling channel for the DU part at the intermediate IAB node to transmit the F1AP packet to the DonorIAB node through the specific SRB of the MT part of the intermediate IAB node; or the like, or a combination thereof,

when a service IAB node is started and RRC connection is established with a network, a DU part of an intermediate IAB node allocates a unique identifier in the service IAB node for the service IAB node and constructs an F1AP message containing the identifier;

the F1AP message is sent to the DU part of the DonorIAB node via the special SRBx of the intermediate IAB node;

when the CU-CP instance of the Donor IAB node constructs an RRC reconfiguration message carrying the radio parameter configuration aiming at the new SRBx and transmits the RRC reconfiguration message to the DU part of the Donor IAB node through the F1AP of the middle IAB node, the radio parameter configuration aiming at the new SRBx is transmitted to the MT part of the service IAB node;

An embodiment of the present invention provides a donoraib node, including:

when transmitting the uplink signaling:

receiving signaling PDU transmitted by other IAB nodes from SRB at DU part of a Donor IAB node, wherein the Donor IAB node is a relay IAB node connected with an IAB node providing access to a core network;

transmitting the PDU to a CU-CP example corresponding to a signaling bearer of a first hop IAB node in a DU part of a Donor IAB node, or after finding out pre-selected and stored signaling bearer context information according to adaptation layer information, transmitting the PDU to the CU-CP example corresponding to the signaling bearer of the first hop IAB node through corresponding SCTP association according to the mapping relation of the found corresponding CU-CP example, wherein the first hop IAB node is an IAB node providing access to a core network;

and/or the presence of a gas in the gas,

when transmitting the downlink signaling:

receiving the F1AP message at the DU entity of the Donor IAB node;

and/or the presence of a gas in the atmosphere,

when configuring the signaling bearer:

the CU-CP instance of the Donor IAB node saves the identification of the IAB node as the identification CRNTI ID of the UE and completes the corresponding RRC establishment process;

initiating a UE context establishment process at a CU-CP instance of a Donor IAB node;

after the CU-CP instance of the Donor IAB node receives the UE context establishment response, an RRC reconfiguration message is constructed and is transmitted to a DU entity of the Donor IAB node through F1AP of the IAB node and an MT part of the IAB node so as to complete the configuration of SRB 2/new SRBx and DRB for OAM;

or the like, or, alternatively,

after receiving the F1AP message sent by the intermediate IAB node through the special SRBx of the intermediate IAB node, the DU part of the Donor IAB node forwards the F1AP message to the CU-CP instance of the Donor IAB node, where the F1AP message contains a unique identifier assigned to the serving IAB node by the intermediate IAB node when the serving IAB node is powered on and establishes RRC connection with the network;

finishing the subsequent RRC establishment process according to the received RRC establishment request message in the CU-CP example of the Donor IAB node;

initiating a UE context setup process for an intermediate IAB node after a CU-CP instance of the Donor IAB node establishes a PDU session to download OAM configuration parameters at a service IAB node; or, the CU part of the Donor IAB selects a CU-CP instance of the Donor IAB aiming at the service IAB and initiates a UE context setup process aiming at the service IAB, informs the DU part of the Donor IAB to establish context information aiming at the service IAB, and carries an indicator to indicate the DU part of the Donor IAB to be the IAB;

after the CU-CP instance of the Donor IAB node receives the UE context setup response, an RRC reconfiguration message carrying the radio parameter configuration aiming at the new SRBx is constructed and is transmitted to a DU part of the Donor IAB node through F1AP of the middle IAB node;

The embodiment of the invention provides a first hop IAB node, which comprises:

when transmitting the uplink signaling:

receiving PDUs transmitted by DU parts of other IAB nodes at a CU-CP instance corresponding to a first-hop IAB node signaling bearer, wherein the first-hop IAB node is an IAB node providing access to a core network;

the PDU is addressed to a corresponding processing unit for decryption according to the adaptation layer information at the corresponding CU-CP example;

and/or the presence of a gas in the atmosphere,

when transmitting the downlink signaling:

receiving a signaling PDU (protocol data Unit) which is sent by a DU (protocol data Unit) entity of a Donor IAB node and subjected to RLC/MAC/PHY (radio link control/physical layer) processing at an MT part of a first-hop IAB node;

An embodiment of the present invention provides a signaling processing apparatus, including:

a service uplink signaling transmission module, configured to, when transmitting uplink signaling:

after a DU part of a service IAB node generates an F1AP message, selecting a corresponding MT part according to a preset strategy, wherein the service IAB node is an IAB node providing access service for UE;

the service IAB node transmits the signaling from the mapped load;

and/or the presence of a gas in the atmosphere,

a service downlink signaling transmission module, configured to, when transmitting downlink signaling:

and/or the presence of a gas in the atmosphere,

a service signaling bearer configuration module, configured to, when configuring a signaling bearer:

the serving IAB node activates the F1AP signaling transport channel for the DU part of the serving IAB node to transmit the F1AP packet to the Donor IAB node over the specific SRB of the MT part of the serving IAB node.

a middle uplink signaling transmission module, configured to, when transmitting the uplink signaling:

after removing RLC, MAC and PHY layer data of a data packet from a DU part of the middle IAB node, forwarding the data packet to a corresponding MT part selected according to a preset strategy;

the intermediate IAB node transmits the signaling from the mapped bearer;

and/or the presence of a gas in the gas,

the DU part of the middle IAB node processes the data packet by RLC, MAC and PHY layers and then sends the processed data packet to the MT part of the next hop IAB node on the SRB signaling bearer of the corresponding IAB node;

and/or the presence of a gas in the atmosphere,

the intermediate IAB node activates the F1AP signaling channel for the DU part to transmit the F1AP packet to the Donor IAB node through the specific SRB of the MT part of the intermediate IAB node; or the like, or a combination thereof,

the F1AP message is sent to the DU part of the Donor IAB node via the special SRBx of the intermediate IAB node;

when the CU-CP instance of the Donor IAB node constructs an RRC reconfiguration message carrying the radio parameter configuration for the new SRBx and delivers it to the DU part of the Donor IAB node via F1AP of the intermediate IAB node, the radio parameter configuration for the new SRBx is delivered to the MT part of the serving IAB node.

a Donor uplink signaling transmission module, configured to, when transmitting uplink signaling:

a DU part of a Donor IAB node receives a signaling PDU transmitted by other IAB nodes from an SRB, wherein the Donor IAB node is a relay IAB node connected with an IAB node providing access to a core network;

the DU part of the Donor IAB node transmits the PDU to the corresponding CU-CP example of the signaling bearer of the first hop IAB node, or after finding out the pre-selected and stored signaling bearer context information according to the adaptation layer information, transmits the PDU to the corresponding CU-CP example of the signaling bearer of the first hop IAB node through the corresponding SCTP association according to the found mapping relation of the corresponding CU-CP example, wherein the first hop IAB node is the IAB node providing access to the core network;

and/or the presence of a gas in the atmosphere,

a Donor downlink signaling transmission module, configured to, when transmitting downlink signaling:

the DU entity of the Donor IAB node receives the F1AP information;

and/or the presence of a gas in the gas,

a Donor signaling bearer configuration module, configured to, when configuring a signaling bearer:

when the IAB node is started and RRC connection is established with a network, a DU entity of the Donor IAB node selects a CU-CP example of the Donor IAB node to provide signaling service of F1AP for the CU-CP example;

the CU-CP example of the Donor IAB saves the identification of the IAB as the identification CRNTI ID of the UE and completes the corresponding RRC establishment process;

or the like, or a combination thereof,

after receiving the F1AP message sent by the intermediate IAB node through the special SRBx of the intermediate IAB node, the DU part of the Donor IAB node forwards the F1AP message to the CU-CP instance of the Donor IAB node, wherein the F1AP message contains a unique identifier which is allocated to the serving IAB node by the DU part of the intermediate IAB node when the serving IAB node is started up and RRC connection is established with a network;

after the CU-CP instance of the Donor IAB node receives the UE context setup response, an RRC reconfiguration message carrying the radio parameter configuration for the new SRBx is constructed and is transmitted to the DU part of the Donor IAB node through F1AP of the middle IAB node.

a first hop uplink signaling transmission module, configured to, when transmitting uplink signaling:

and/or the presence of a gas in the gas,

a first-hop downlink signaling transmission module, configured to, when transmitting downlink signaling:

The invention has the following beneficial effects:

the technical scheme provided by the embodiment of the invention provides a scheme for multi-hop 5G wireless backhaul node signaling bearer transmission and mapping, and can meet the requirement of providing stable signaling data transmission service for users under different wireless backhaul network architectures.

Furthermore, the signaling bearer processing scheme under the wireless backhaul network architecture can ensure that the signaling bearer mapping of the wireless backhaul node can be better performed on the premise of minimal modification to the protocol stack, provide stable data transmission service for the UE, and reduce the complexity of the wireless backhaul system.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not limit the invention. In the drawings:

fig. 1 is a schematic diagram of a 5G communication network in the background art;

FIG. 2 is a diagram of a protocol stack architecture of a user plane and a control plane in the background art;

fig. 3 is a schematic diagram of an IAB control plane network architecture a in the background art;

fig. 4 is a schematic diagram of an IAB control plane network architecture b in the background art;

fig. 5 is a schematic diagram of an IAB control plane network architecture c in the background art;

fig. 6 is a schematic flowchart of an implementation of a signaling processing method when uplink signaling is transmitted on a serving IAB node according to an embodiment of the present invention;

fig. 7 is a schematic flowchart of an implementation of a signaling processing method when performing uplink signaling transmission on an intermediate IAB node in an embodiment of the present invention;

fig. 8 is a schematic flowchart of an implementation of a signaling processing method when uplink signaling transmission is performed on a Donor IAB node in the embodiment of the present invention;

fig. 9 is a schematic flowchart of an implementation of a signaling processing method when uplink signaling transmission is performed on a first-hop IAB node in the embodiment of the present invention;

fig. 10 is a schematic flowchart of an implementation of a signaling processing method when downlink signaling is transmitted on a serving IAB node in the embodiment of the present invention;

fig. 11 is a schematic flowchart of an implementation of a signaling processing method when downlink signaling is transmitted on an intermediate IAB node in the embodiment of the present invention;

fig. 12 is a schematic flowchart of an implementation of a signaling processing method when downlink signaling is transmitted on a Donor IAB node in the embodiment of the present invention;

fig. 13 is a schematic flowchart of an implementation of a signaling processing method when downlink signaling is transmitted on a first-hop IAB node in the embodiment of the present invention;

fig. 14 is a schematic flowchart of an implementation flow of a signaling processing method when performing signaling bearer configuration on a serving IAB node in an embodiment of the present invention;

fig. 15 is a schematic flowchart of an embodiment of a signaling processing method when an intermediate IAB node on an intermediate IAB node is powered on and establishes an RRC connection with a network to perform signaling bearer configuration according to the present invention;

fig. 16 is a schematic flowchart of an embodiment of a signaling processing method when a serving IAB node on an intermediate IAB node is powered on and establishes an RRC connection with a network to perform signaling bearer configuration according to the present invention;

fig. 17 is a schematic flowchart of an embodiment of a signaling processing method when an intermediate IAB node on a Donor IAB node is powered on and an RRC connection is established with a network to perform signaling bearer configuration in the embodiment of the present invention;

fig. 18 is a schematic flowchart of an implementation process of a signaling processing method when a serving IAB node on a Donor IAB node is powered on and an RRC connection is established with a network to perform signaling bearer configuration according to an embodiment of the present invention;

fig. 19 is a general schematic diagram of an example flow of a signaling processing method when performing signaling bearer configuration according to an embodiment of the present invention;

FIG. 20 is a block diagram of a serving IAB node according to an embodiment of the present invention;

fig. 21 is a schematic structural diagram of an intermediate IAB node in an embodiment of the present invention;

fig. 22 is a schematic structural diagram of a Donor IAB node in an embodiment of the present invention;

fig. 23 is a schematic structural diagram of a first-hop IAB node in the embodiment of the present invention.

Detailed Description

In the future development of mobile communication systems, in order to better meet user requirements and greatly improve network capacity and throughput, more transmission nodes and larger transmission bandwidth must be introduced. In a 5G network, the number of access sites is greatly increased, but it cannot be guaranteed that all access sites have the condition of wired backhaul, and introduction of a wireless access site cannot be avoided. However, there is no specific and detailed scheme for multi-hop 5G wireless backhaul node signaling bearer transport and mapping in the prior art. Therefore, these new characteristics need to be studied to meet the requirements of providing stable signaling data transmission services for users under different wireless backhaul network architectures. Meanwhile, in the face of the requirements of higher transmission rate and transmission delay of 5G, higher requirements are also put on the wireless backhaul network. Based on this, the embodiment of the present invention provides a signaling bearer processing scheme under a wireless backhaul network architecture, so as to ensure that, on the premise of minimizing modification to a protocol stack, signaling bearer mapping of a wireless backhaul node can be better performed, provide a stable data transmission service for a UE, and reduce complexity of a wireless backhaul system.

The following describes embodiments of the present invention with reference to the drawings.

In the description process, the service IAB node, the intermediate IAB node, the Donor IAB node, and the first-hop IAB node will be described separately, and then an implementation of the combination will be given, and an example of the implementation of the combination will be given to better understand the implementation of the scheme given in the embodiment of the present invention. Such an explanation does not mean that they must be implemented cooperatively or separately, and actually, when the serving IAB node, the intermediate IAB node, the Donor IAB node, and the first-hop IAB node are implemented separately, they also solve the problems on the respective sides, and when they are used in combination, they can achieve better technical effects.

Specifically, an IAB node includes two parts, a DU (Distributed Unit) and an MT (Mobile Terminal), where the DU is responsible for wireless communication with a next-hop node or UE through a Uu interface, and the MT is responsible for wireless communication with a previous-next-hop node, and in implementation, the DU may be understood as a DU entity of a wired network, and the MT may be considered as a UE.

The serving IAB node may be understood as an IAB node that ultimately provides access service to the UE, and is understood as a last hop node of the IAB network, and the intermediate IAB is an intermediate node except the last hop and the first hop IAB node, and is a Donor node, and the Donor is a characteristic of the R10Relay, and in the implementation, specific reference may be made to the relevant definition of the R10 Relay.

The DonorIAB node may include a CU (central Unit) logical entity and a DU logical entity, and under a CP-UP (central Unit-Control plane) split architecture, a CU is further divided into a CP portion with Control plane only functions and an UP plane with user plane only functions.

In addition, if necessary, the characteristics of F1AP, CU, DU, etc. involved in the embodiments can be defined by the concept standardized by 5G.

The specific signaling processing will involve three flows of uplink signaling, downlink signaling and signaling configuration, which will be separately described in the implementation, but obviously, they are separately part of the signaling processing, and such description does not mean that they must be implemented cooperatively or separately, and when they are implemented separately, they also have the problem of their own flow, and when they are used in combination, they will obtain better technical effect.

In the treatment process, the method mainly comprises the following main points:

the MT serving the IAB configures the adaptation layer of the signaling bearer and completes the mapping to the own node specific SRBx.

The Donor CU-CP instance initiates the UE context setup and RRC reconfiguration procedures to configure the radio parameters for the new SRBx.

The UE context establishment request message needs to carry an indicator to indicate that the context corresponding to the node DU belongs to the IAB node, so that the UE activates a corresponding function, such as an adaptation layer.

The RRC establishment message sent by the Donor CU-CP to the IAB child node needs to carry the IAB-RNTI ID distributed by the IAB parent node, so that the RRC establishment message can be used as an addressing route when an adaptation layer is subsequently added.

For the uplink/downlink signaling bearer of the UE, at least the following information units are added to an adaptation layer: IAB node ID (IAB node identity, unique under each Donor CU, configured by OAM or Donor CU), IAB-RNTI ID (UE identity, unique within, assigned by the serving IAB node).

Specific examples of the above-described points will be described below.

Firstly, uplink signaling transmission.

1. Uplink signaling transport implementation on the serving IAB node.

When transmitting the uplink signaling:

the service IAB node is an IAB node for providing access service for the UE;

the MT part of the service IAB node completes the mapping to the specific SRB signaling bearer of the corresponding IAB and the addition of an adaptation layer;

the serving IAB node transmits signaling from the mapped bearer.

Fig. 6 is a schematic flowchart of an implementation process of a signaling processing method when performing uplink signaling transmission on a serving IAB node, where as shown in the figure, the method may include:

step 601, after the DU part of the service IAB node generates the F1AP message, selecting the corresponding MT part according to a preset policy, where the service IAB node is an IAB node providing access service for the UE;

step 602, the MT part of the serving IAB node completes the mapping to the specific SRB signaling bearer of the corresponding IAB;

step 603, the service IAB node transmits the signaling from the mapped bearer.

In implementation, the mapping to the specific SRB signaling bearer of the corresponding IAB may be to the new SRBx of the IAB or to the SRB 1/2/3 of the IAB.

2. Uplink signaling transmission implementation on the intermediate IAB node.

When transmitting the uplink signaling:

the intermediate IAB node transmits signaling from the mapped bearer.

Fig. 7 is a schematic flowchart of an implementation process of a signaling processing method when performing uplink signaling transmission on an intermediate IAB node, where as shown in the figure, the method may include:

step 701, a DU part of an intermediate IAB node receives a signaling data packet transmitted from an SRB by another IAB node, where the intermediate IAB node is a relay IAB node between an IAB node providing access service for UE and an IAB node providing access to a core network;

step 702, after removing RLC, MAC and PHY layer data of the data packet from the DU part of the middle IAB node, forwarding the data packet to the corresponding MT part selected according to a preset policy;

step 703, the MT part of the intermediate IAB node completes the mapping to the specific SRB signaling bearer of the corresponding IAB according to the mapping relationship saved in advance;

and step 704, the middle IAB node transmits the signaling from the mapped bearer.

3. And implementing uplink signaling transmission on the Donor IAB node.

When transmitting the uplink signaling:

the DU part of the Donor node receives the signaling PDU transmitted by other IAB nodes from SRB, the Donor node is the IAB host node connected with the IAB node providing access service;

and the DU part of the Donor node transmits the PDU to a CU-CP instance corresponding to the signaling bearer of the first hop IAB node, or after finding out the pre-selected and stored signaling bearer context information of the service IAB node according to the adaptation layer information, the PDU is transmitted to the corresponding CU-CP instance through the corresponding SCTP association (association) according to the found mapping relation of the corresponding CU-CP instance, and the first hop IAB node is the first IAB node providing access to the Donor node.

Fig. 8 is a schematic diagram of an implementation flow of a signaling processing method when uplink signaling transmission is performed on a donoraib node, where as shown in the figure, the method may include:

step 801, a DU part of a Donor IAB node receives a signaling PDU transmitted from an SRB by other IAB nodes, wherein the Donor IAB node is a relay IAB node connected with an IAB node providing access to a core network;

and step 802, the DU part of the Donor IAB node transmits the PDU to the CU-CP instance corresponding to the signaling bearer of the first-hop IAB node, or after finding out the pre-selected and stored signaling bearer context information according to the adaptation layer information, the PDU is transmitted to the CU-CP instance corresponding to the signaling bearer of the first-hop IAB node through the corresponding SCTP association according to the found mapping relation of the corresponding CU-CP instance, and the first-hop IAB node is the IAB node providing access to the core network.

4. And carrying out uplink signaling transmission on the first-hop IAB node.

When transmitting the uplink signaling:

a CU-CP instance corresponding to a first hop IAB node signaling bearer receives PDUs transmitted by DU parts of other IAB nodes, wherein the first hop IAB node is the first IAB node providing access to a Donor node;

the decrypted PDUs are addressed to the corresponding UE RRC/F1AP processing entity by F1AP id.

Fig. 9 is a schematic flowchart of an implementation process of a signaling processing method when uplink signaling transmission is performed on a first-hop IAB node, where as shown in the figure, the signaling processing method may include:

step 901, a CU-CP instance corresponding to a first-hop IAB node signaling bearer receives PDUs transmitted by DU portions of other IAB nodes, where the first-hop IAB node is an IAB node providing access to a core network;

step 902, the corresponding CU-CP instance addresses the PDU to the corresponding processing unit for decryption according to the adaptation layer information;

and step 903, addressing the decrypted PDU to a corresponding UE RRC/F1AP processing entity through F1AP id.

The following describes an example of processing for implementing uplink signaling bearer by combining entities.

Example 1:

1: for the F1AP message generated by the DU part, the corresponding MT part is selected by the DU part of the service IAB according to a certain policy, and then the MT part of the service IAB performs mapping to the specific SRB signaling bearer of the corresponding IAB, for example, mapping to the new SRBx of the IAB, or alternatively, mapping directly to the SRB 1/2/3 of the IAB.

2: the MT part of the service IAB will construct the adaptation layer information of the above messages, in which at least the following information elements are added to the adaptation layer: IAB node ID, or alternatively, IAB-RNTI ID;

3: the DU part of the middle IAB node (as a father node) is responsible for removing the RLC/MAC/PHY layer from the special SRB of other IAB nodes (as child nodes) and then forwarding the data packet to the corresponding MT part for processing;

4: the MT part of the intermediate IAB node (as a parent node) maps the intermediate IAB node to a special SRB bearer corresponding to the IAB according to a mapping relation which is preserved in advance;

5: a DU part of Donor transmits the PDU (including an adaptation layer) to a CU-CP example corresponding to the first-hop IAB signaling bearer aiming at the signaling bearer;

6: the PDU is further addressed to a corresponding processing unit (an encryption and decryption layer of the IAB node) by the corresponding CU-CP instance according to the adaptation layer information, and the signaling PDU is addressed to a corresponding UE RRC/F1AP processing entity through F1AP id after decryption.

Example 2

1-4: may be the same as in embodiment 1;

5: a DU part of the Donor finds out the pre-selected and stored signaling bearing context information (mapping relation to the corresponding CU-CP example) according to the adaptation layer information (IAB node id) aiming at the signaling bearing, and transmits the signaling bearing PDU to the corresponding CU-CP example through the corresponding SCTP association;

6: the PDU is directly sent to a corresponding processing unit (an encryption and decryption layer of the IAB node) by a corresponding CU-CP instance, and the signaling PDU is addressed to a corresponding UE RRC/F1AP processing entity through F1AP id after decryption.

And II, downlink signaling transmission.

1. Downlink signaling transmission implementation on the serving IAB node.

When downlink signaling is transmitted:

MT part of the serving IAB node

When the last hop of IAB node is judged according to the IAB node id information of the adaptation layer, performing adaptation layer removal operation and performing corresponding processing, such as decryption processing and the like for F1AP signaling;

the MT part of the service IAB node forwards the processed PDU to the corresponding DU part; and mapping and other operations to the SRB of the UE are completed by the DU part.

Fig. 10 is a schematic flowchart of an implementation process of a signaling processing method when downlink signaling transmission is performed on a serving IAB node, where as shown in the figure, the signaling processing method may include:

step 1001, the MT part of the service IAB node removes RLC, MAC and PHY layer data of a special SRB packet sent by the last-hop IAB node;

step 1002, when the MT part of the service IAB node judges as the last hop IAB node according to the IAB node id information of the adaptation layer, the MT part of the service IAB node carries out decryption processing;

step 1003, the MT part of the service IAB node forwards the decrypted PDU to the corresponding DU part for processing;

step 1004, the DU part of the service IAB node sends the processed F1AP message to the corresponding processing unit for subsequent processing.

In implementation, the MT part of the serving IAB node constructs adaptation layer information of the F1AP message, and adds an IAB node ID of the serving IAB and/or an IAB-RNTI ID of the serving IAB in the adaptation layer information.

In implementation, the processed F1AP message is sent to a corresponding processing unit for subsequent processing, including:

when the F1AP message contains RRC container, RLC/MAC/PHY processing is carried out according to SRB ID, and the processed message is sent to UE on the corresponding SRB bearing of the UE;

if the message F1AP does not include the RRC container, the corresponding function F1 is processed.

2. And implementing downlink signaling transmission on the intermediate IAB node.

When transmitting the downlink signaling:

the MT part of the intermediate IAB node forwards the information of the adaptation layer and the routing information stored in advance to the corresponding DU part;

the MT part is then sent to the next-hop IAB node on the SRB signaling bearer of the corresponding IAB node.

Fig. 11 is a schematic flowchart of an implementation process of a signaling processing method when downlink signaling transmission is performed on an intermediate IAB node, where as shown in the figure, the signaling processing method may include:

step 1101, the MT part of the middle IAB node receives a special SRB packet transmitted by the DU part of another IAB node or a donorab node;

step 1102, after removing data of an RLC layer, an MAC layer and a PHY layer of a data packet, the MT part of the middle IAB node forwards the data packet to a corresponding DU part according to the information of an adaptation layer and the pre-stored routing information;

step 1103, the DU part of the intermediate IAB node completes mapping to the SRB signaling bearer corresponding to the intermediate IAB node according to a mapping relationship stored in advance;

and step 1104, after the DU part of the middle IAB node performs RLC, MAC and PHY layer processing on the data packet, the data packet is sent to the MT part of the next-hop IAB node on the SRB signaling bearer of the corresponding IAB node.

3. And downlink signaling transmission implementation on the Donor IAB node.

When downlink signaling is transmitted:

the DU entity of the Donor node receives F1AP information;

after RLC/MAC/PHY processing is carried out on the signaling PDU in the F1AP information, the signaling PDU is sent to an MT part of a first-hop IAB node; or a Donor DU entity, constructing adaptation layer information carried by UE signaling according to the received F1AP information, wherein at least the following information units are added to the adaptation layer: the IAB node ID and the IAB-RNTI ID are mapped to the first-hop IAB signaling special SRB bearer according to the stored signaling bearer context information of the UE service IAB, and finally RLC/MAC/PHY processing is carried out and the processed information is sent to the MT part of the first-hop IAB on the corresponding SRB bearer.

Fig. 12 is a schematic flowchart of an implementation process of a signaling processing method when downlink signaling is transmitted on a donoraib node, where as shown in the figure, the method may include:

step 1201, the DU entity of the Donor IAB node receives F1AP information;

step 1202, after RLC/MAC/PHY processing is performed on the signaling PDU in the F1AP information, the signaling PDU is sent to the MT part of the first-hop IAB node.

In practice, the F1AP information is: after a UE RRC/F1AP processing unit corresponding to a CU-CP instance of a Donor IAB node is generated, carrying out security encryption operation through a special SRB processing unit of a service IAB node corresponding to the UE and adding adaptation layer information, and then sending the security encryption operation to a DU entity of the Donor IAB node through an F1AP message in a container mode, wherein the F1AP message contains identification information of a special SRB;

or the like, or a combination thereof,

in practice, the F1AP information is: after a UE RRC/F1AP processing unit corresponding to a CU-CP instance of a Donor IAB node generates a signaling PDU of the UE, after the signaling PDU is subjected to security encryption operation by a special SRB processing unit of a service IAB node corresponding to the UE, the signaling PDU is sent to a DU entity of the Donor IAB node through an F1AP message of the service IAB node in a container mode, and the F1AP message contains identification information of the SRB of the UE and an IAB-RNTI ID;

and the DU entity of the Donor IAB node constructs adaptation layer information of UE signaling bearer according to the received F1AP information, maps the special SRB bearer to the first-hop IAB node signaling according to the saved signaling bearer context information of the UE service IAB node, and sends the special SRB bearer to the MT part of the first-hop IAB node on the corresponding SRB bearer after RLC/MAC/PHY processing.

4. And downlink signaling transmission implementation on the first-hop IAB node.

When downlink signaling is transmitted:

and the MT part of the first-hop IAB node receives the signaling PDU which is sent by the DU entity of the Donor node and is subjected to RLC/MAC/PHY processing.

Fig. 13 is a schematic flowchart of an implementation process of a signaling processing method when downlink signaling transmission is performed on a first-hop IAB node, where as shown in the figure, the signaling processing method may include:

step 1301, determining a DU entity of a Donor IAB node;

step 1302, the MT part of the first-hop IAB node receives the signaling PDU after RLC/MAC/PHY processing sent by the DU entity of the Donor IAB node.

The following describes an example of processing for jointly implementing a downlink signaling bearer by each entity.

Example 3

1: generating a signaling PDU (F1AP message) of the UE by a UE RRC/F1AP processing unit corresponding to the Donor CU-CP instance, then transferring the signaling PDU to a special SRB processing unit of a service IAB corresponding to the UE for carrying out security encryption operation, and then adding adaptation layer information for the PDU, wherein the adaptation layer information at least comprises the following steps: an IAB node ID and an IAB-RNTI ID are finally sent to a DU entity of the Donor in a container mode through an F1AP message, and the message contains the identification information of the special SRB;

2: the Donor DU entity transfers the received F1AP information to the corresponding SRB bearing for RLC/MAC/PHY processing according to the identification information of the special SRB and sends the signaling PDU to the MT part of the first hop IAB;

3: the MT part of the middle IAB node (as a child node) is responsible for removing the RLC/MAC/PHY layer from the special SRB data packet from other IAB nodes (as a parent node) or Donor DUs, and then forwarding the special SRB data packet to the corresponding DU part for processing according to the information of the adaptation layer and the pre-stored routing information

4: the DU part of the middle IAB node (as a child node) completes the mapping to the SRB corresponding to the IAB, then performs RLC/MAC/PHY processing, and sends the processed result to the MT part of the next hop IAB in the corresponding IAB bearer;

5: the MT part of the service IAB is responsible for removing the RLC/MAC/PHY layer from the special SRB data packet from the last hop of IAB node, then judging the special SRB data packet as the last hop of IAB node according to the IAB node id information of the adaptation layer, decrypting the special SRB data packet, and then forwarding the processed PDU to the corresponding DU part for processing;

6: and the DU part of the service IAB directly solves the F1AP message and sends the message to a corresponding processing unit for subsequent processing, if the message contains RRC container, RLC/MAC/PHY processing is carried out according to SRB ID and the message is sent to the UE on the SRB bearing of the corresponding UE, otherwise, the message is processed according to the corresponding function of F1.

Example 4

1: a UE RRC/F1AP processing unit corresponding to the Donor CU-CP instance generates a signaling PDU (F1AP message) of the UE, then the signaling PDU is transferred to a special SRB processing unit of a service IAB corresponding to the UE to carry out security encryption operation, and finally the PDU is sent to a DU entity of the Donor through an F1AP message of the service IAB in a container mode, wherein the message comprises SRB identification information and IAB-RNTI ID of the UE;

2: constructing adaptation layer information carried by the UE signaling by a Donor DU entity according to the received F1AP information, wherein at least the following information units are added to the adaptation layer: IAB node ID and IAB-RNTI ID, then mapping to a first-hop IAB signaling special SRB bearer according to the stored signaling bearer context information of UE service IAB, and finally performing RLC/MAC/PHY processing and sending to the MT part of the first-hop IAB on the corresponding SRB bearer;

3-6: may be the same as in embodiment 3.

And thirdly, configuring signaling load bearing.

1. Configuration signaling bearer enforcement on the serving IAB node.

When configuring the signaling bearer:

carrying the unique identification information of the service IAB node in an RRC establishment message transmitted to an MT part of the service IAB node by a Donor CU-CP instance;

upon receiving the radio parameter configuration for the new SRBx, which the Donor CU-CP instance transmitted to the MT part of the serving IAB node, the configuration of SRB 2/new SRBx and DRB for OAM is completed;

Fig. 14 is a schematic flowchart of an implementation flow of a signaling processing method when signaling bearer configuration is performed on a serving IAB node, where as shown in the figure, the method may include:

1401, when a service IAB node is started up and RRC connection is established with a network, a PDU session is established to download OAM configuration parameters;

step 1402, when receiving radio parameter configuration for new SRBx transmitted to the MT part of the serving IAB node by the intermediate IAB node, completing configuration of SRB 2/new SRBx and DRB for OAM;

step 1403, the service IAB node obtains the identifier of the IAB node from the OAM configuration parameters, and the identifier is unique under the CU part of each Donor IAB node;

in step 1404, the serving IAB node activates the F1AP signaling channel for the DU part of the serving IAB node to transmit the F1AP packet to the donorab node through the specific SRB of the MT part of the serving IAB node.

In the implementation, the method can further comprise the following steps:

when the serving IAB node establishes an F1 connection with the CU portion of the Donor node, the associated IAB node identification is provided to the CU portion of the Donor node.

In implementation, when a related IAB node identifier is provided to the CU part of the Donor node, the obtained serving IAB node identifier and IAB-RNTI ID are carried in the adaptation layer for the CU-CP entity of the Donor node to address to the correct PDCP/RRC processing unit, and the new serving IAB node identifier is stored in the corresponding F1AP context for subsequent addressing; or, for the Donor node to find the context of the corresponding serving IAB node through the IAB-RNTI ID of the adaptation layer.

2. Configuration signaling bearer enforcement on the intermediate IAB node.

When configuring the signaling bearer:

and constructing an RRC reconfiguration message carrying the radio parameter configuration for the new SRBx at the Donor CU-CP instance, and transmitting the RRC reconfiguration message to the MT part of the middle IAB node through F1AP of the middle IAB node.

The intermediate IAB node activates the F1AP signaling channel for the DU part to transmit the F1AP packet to the Donor IAB node through the specific SRB of the MT part of the intermediate IAB node.

1) And when the intermediate IAB node is started to establish RRC connection with the network.

Fig. 15 is a schematic flowchart of an implementation process of a signaling processing method when an intermediate IAB node on an intermediate IAB node is powered on and establishes an RRC connection with a network for signaling bearer configuration, where as shown in the figure, the signaling processing method may include:

step 1501, when the intermediate IAB node is started up and establishes RRC connection with the network, acquiring an identifier of the IAB node from OAM configuration parameters, where the identifier is unique under a CU portion of each Donor IAB node;

step 1501, the intermediate IAB node activates the F1AP signaling channel for the DU part to transmit the F1AP packet to the Donor IAB node through the specific SRB of the MT part of the intermediate IAB node.

2) When the service IAB node is started up and establishes RRC connection with the network.

Fig. 16 is a schematic diagram of an implementation flow of a signaling processing method when a serving IAB node on an intermediate IAB node is powered on and establishes an RRC connection with a network to perform signaling bearer configuration, where as shown in the figure, the signaling processing method may include:

step 1601, when the service IAB node is powered on and establishes RRC connection with the network, the DU part of the middle IAB node allocates a unique identifier in the service IAB node to the service IAB node, and constructs an F1AP message including the identifier;

step 1602, sending the F1AP message to the DU part of the Donor IAB node through the special SRBx of the middle IAB node;

step 1603, when the CU-CP instance of the Donor IAB node constructs an RRC reconfiguration message carrying the radio parameter configuration for the new SRBx and transmits it to the DU part of the Donor IAB node via F1AP of the intermediate IAB node, the radio parameter configuration for the new SRBx is transmitted to the MT part of the serving IAB node.

In the implementation, when configuring the signaling bearer, the method may further include:

when the intermediate IAB node needs to establish an F1 connection with the CU part of the Donor IAB node, the CU part of the Donor IAB node is provided with the relevant IAB node identification.

In an implementation, when the CU part of the Donor IAB node is provided with the relevant IAB node identifier, the obtained intermediate IAB node identifier is carried in the adaptation layer.

In implementation, the DU part of the intermediate IAB node is a unique identifier assigned to the serving IAB node by the serving IAB node, and is determined in the construction F1 AP: when initial UL RRC message, the identification is contained in the adaptation layer; alternatively, the identification is included in the F1AP message.

3. Configuration signaling bearer implementation on the Donor IAB node.

When configuring the signaling bearer:

when the IAB node is started and RRC connection is established with a network, a DU entity of the Donor node selects a CU-CP example of the Donor IAB node to provide signaling service of F1AP for the CU-CP example;

or, after the CU-CP instance of the Donor node initiates a UE context establishment procedure facing a DU part of an intermediate IAB node, it will construct an RRC reconfiguration message, and transmit the RRC reconfiguration message to the DU entity of the intermediate IAB node and to the MT part of the serving IAB node through its serving IAB node (child node of the intermediate IAB node) F1AP, so as to complete the configuration of SRB 2/new SRBx and DRB for OAM;

or, the CU part of the Donor node selects a CU-CP instance of the Donor node aiming at the service IAB node, initiates a UE context setup process aiming at the service IAB node to the DU part of the Donor node, informs the DU part of the Donor node of establishing context information aiming at the service IAB node, and carries an indicator to indicate the DU part of the Donor IAB node that the UE is the IAB node;

or the like, or, alternatively,

after receiving the F1AP message sent by the intermediate IAB node through the special SRBx of the intermediate IAB node, the DU part of the Donor node forwards the F1AP message to the CU-CP instance of the Donor IAB node, where the F1AP message includes the unique identification information of the service IAB;

after the CU-CP instance of the Donor node resolves the corresponding F1AP message, saving the identifier in the F1AP message as the identifier of the UE;

after the CU-CP instance of the Donor node receives the UE context setup response, an RRC reconfiguration message carrying the radio parameter configuration for the new SRBx is constructed and is transmitted to the DU part of the Donor node through F1AP of the middle IAB node.

Fig. 17 is a schematic diagram of an implementation flow of a signaling processing method when an intermediate IAB node on a donor IAB node is powered on and establishes an RRC connection with a network to perform signaling bearer configuration, where as shown in the figure, the signaling processing method may include:

step 1701, when the IAB node is started and RRC connection is established with the network, a DU entity of the Donor IAB node selects a CU-CP instance of the Donor IAB node to provide signaling service of F1AP for the CU-CP instance;

step 1702, the CU-CP instance of the Donor IAB node saves the identity of the IAB node as the identity CRNTI ID of the UE, and completes the corresponding RRC establishment procedure;

step 1703, the CU-CP instance of the Donor IAB node initiates a UE context establishment process;

step 1704, after receiving the UE context setup response, the CU-CP instance of the Donor IAB node constructs an RRC reconfiguration message, and transmits the RRC reconfiguration message to the DU entity of the Donor IAB node and the MT part of the IAB node through F1AP of the IAB node, so as to complete the configuration of SRB 2/new SRBx and DRB for OAM.

2) The implementation is carried out when the service IAB node is started to establish RRC connection with the network.

Fig. 18 is a schematic diagram of an implementation flow of a signaling processing method when a serving IAB node on a donoraib node is powered on and establishes an RRC connection with a network to perform signaling bearer configuration, where as shown in the figure, the method may include:

step 1801, after receiving the F1AP message sent by the intermediate IAB node through the special SRBx of the intermediate IAB node, the DU part of the Donor IAB node forwards the message to the CU-CP instance of the Donor IAB node through the F1AP message of the intermediate IAB node, where the F1AP message includes a unique identifier allocated to the serving IAB node by the DU part of the intermediate IAB node when the serving IAB node is powered on and establishes RRC connection with the network;

step 1802, after the CU-CP instance of the donoraib node resolves the corresponding F1AP message, saving the identifier in the F1AP message as the identifier of the UE;

step 1803, the CU-CP instance of the donoraib node completes a subsequent RRC establishment procedure according to the received RRC establishment request message;

step 1804, CU-CP instance of donoraib node initiates UE context setup process for intermediate IAB node after PDU session download OAM configuration parameter is established by service IAB node; or, the CU part of the Donor IAB selects a CU-CP instance of the Donor IAB aiming at the service IAB and initiates a UE context setup process aiming at the service IAB, informs the DU part of the Donor IAB to establish context information aiming at the service IAB, and carries an indicator to indicate the DU part of the Donor IAB to be the IAB;

step 1805, after receiving the UE context setup response, the CU-CP instance of the donoraib node constructs an RRC reconfiguration message carrying the radio parameter configuration for the new SRBx, and transmits the RRC reconfiguration message to the DU part of the donoraib node through F1AP of the middle IAB node.

In implementation, when the adaptation layer information of the UE signaling bearer is constructed, the method may further include:

and adding the IAB node ID and the IAB-RNTI ID into the adaptation layer information.

In the implementation, in the process of initiating the establishment of the UE context by the CU-CP instance of the Donor IAB node, an indicator is carried in the UE context establishment request message to indicate the DU entity of the Donor IAB node that the UE is the IAB node.

In implementation, the RRC reconfiguration message constructed by the CU-CP instance of the Donor IAB node carries the radio parameter configuration for the new SRBx.

the receiving intermediate IAB node provides the associated IAB node identification to the CU portion of the DonorIAB node when it needs to establish the F1 connection with the CU portion of the DonorIAB node and stores it in context.

In an implementation, the related IAB node id provided to the CU part of the DonorIAB node is an intermediate IAB node id carried in the adaptation layer.

In implementation, when the CU-CP instance of the donoraib node completes the subsequent RRC establishment, the identifier is carried in the RRC establishment message.

In implementation, the DU part of the intermediate IAB node is a unique identifier allocated to the serving IAB node by the serving IAB node, and is determined by the construction F1 AP: initial UL RRC message, including the identification in the adaptation layer; alternatively, the identification is included in the F1AP message.

In implementation, in the process that a CU-CP instance of a donorria node initiates a UE context setup for an intermediate IAB node, an indicator is carried to indicate the intermediate IAB node that the UE is an IAB node.

In an implementation, the indicator indicates that the information is transmitted to the intermediate IAB node through the F1AP and the special SRBx of the intermediate IAB node.

In the implementation, the method can further comprise the following steps:

when the serving IAB node establishes the F1 connection with the CU portion of the Donor node, the receiving serving IAB node provides the associated IAB node identification to the CU portion of the Donor node.

In implementation, when providing a related IAB node identifier to the CU part of the Donor node, the obtained serving IAB node identifier and IAB-RNTI ID are carried in the adaptation layer, so as to be used for the CU-CP entity of the Donor node to address to a correct PDCP/RRC processing unit, and store a new serving IAB node identifier in a corresponding F1AP context for subsequent addressing; or the like, or, alternatively,

when providing the related IAB node identification for the CU part of the Donor node, the obtained service IAB node identification and the IAB-RNTI ID are carried in the adaptation layer, the DU part of the Donor node finds the context of the corresponding service IAB node through the IAB-RNTI ID of the adaptation layer, the signaling packet is transmitted to the CU-CP instance of the corresponding Donor node by adopting the F1AP process, and the CU-CP instance of the Donor node resolves the corresponding F1 message and then delivers the F1 message to the F1AP for processing.

3. Configuration signaling bearer implementation on the first-hop IAB node.

When configuring the signaling bearer:

after the CU-CP instance of the Donor node initiates the UE context establishment procedure facing to the Donor DU, it will construct an RRC reconfiguration message, and transmit it to the Donor DU entity through F1AP of the first-hop IAB node and to the MT part of the IAB node, so as to complete the configuration of SRB 2/new SRBx and DRB for OAM.

The following describes an example of a configuration process for jointly implementing a signaling bearer by each entity.

Fig. 19 is a general schematic diagram of an example flow of a signaling processing method during signaling bearer configuration, and reference may be made to fig. 19 for timing, execution positions, and interaction relationships among the steps in embodiments 5 and 6.

In embodiments 5 and 6, IAB node2 is an intermediate IAB node, and IAB node1 is a serving IAB node.

Example 5

Initial by IAB node 2:

1: the IAB node2 is used as UE, starts up and establishes RRC connection with the network, at this time, the Donor DU selects a proper Donor CU-CP instance to provide the signaling service of F1AP for the UE, the Donor CU-CP instance stores the IAB node2 as the identity CRNTI ID of the UE and completes the corresponding RRC establishment process (through UL/DL RRC message transfer message of IAB 2).

2: the Donor CU-CP instance initiates a UE context establishment process (establishing SRB 2/new SRBx and DRB for OAM), wherein an indicator needs to be carried in a UE context establishment request message to indicate the Donor DU, the UE is an IAB node, and the Donor DU can apply functions such as an adaptation layer and the like aiming at a data packet of the IAB. After receiving the UE context setup response, an RRC reconfiguration message (carrying the radio parameter configuration for the new SRBx) is constructed, and is transmitted to the Donor DU through F1AP of IAB2, and then is transmitted to the MT part of IAB2, thereby completing the configuration of SRB 2/new SRBx and DRB for OAM. The IAB node2 needs to obtain the IAB node identifier from the OAM configuration parameters, and the identifier is unique under each Donor CU.

3: the IAB node2 will activate the F1AP signaling channel for the DU part, where the DU of the IAB needs to be able to transmit the F1AP packet to the Donor through a specific SRB, e.g. SRBx, of the MT part.

4: when an IAB node2 tries to establish an F1 connection with a Donor CU, it provides the associated IAB node ID to the Donor CU, where the newly obtained IAB2 node ID may be carried in the adaptation layer and the Donor CU saves the ID in the context after receiving it.

Initial from IAB node 1:

5: when the IAB node1 is used as the UE, the UE starts up and establishes RRC connection with the network, and then the DU part of the IAB node2 allocates a unique identifier in the IAB node, such as an IAB-RNTI ID, to the UE, and constructs F1 AP: initial UL RRC message, this identity will be included in the adaptation layer (and optionally also in the F1AP message), then this PDU will be sent to the Donor via the special SRBx of IAB2, and after receipt of the Donor DU, it will be sent via the F1AP message of IAB2, for example: and the UL RRC message transfer message is forwarded to the Donor CU-CP instance, then the Donor CU-CP instance resolves the corresponding F1AP message, stores the IAB node1 as the identification IAB-RNTI ID of the UE, and completes the subsequent RRC establishment process (through the UL/DL RRC message transfer message of the IAB 2) according to the received RRC establishment request message (optionally, the RRC establishment message carries the IAB-RNTI ID).

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

7: IAB node1 will activate the F1AP signaling channel for the DU part, where the DU of the IAB needs to be enabled to transmit F1AP packets to Donor via a specific SRB, e.g., SRBx, of the MT part.

8: when IAB node1 tries to establish F1 connection with Donor CU, providing relevant IAB node identification to Donor CU; the adaptation layer can carry the newly obtained IAB1 node ID and IAB-RNTI ID, so that the donor CU-CP can address the correct PDCP/RRC processing unit (SRBx processing entity of IAB 1) according to the information of the adaptation layer, and simultaneously store the new IAB1 node ID in the corresponding F1AP context for subsequent addressing.

9: IAB1 may provide service to the access UE, and the signaling bearer of the UE is transmitted to the Donor through the corresponding SRBx bearers of IAB1 and IAB2, and the signaling data transmission mechanism is as in embodiments 1 and 3.

Example 6

1 to 4, and 5, may be the same as in embodiment 5.

6: the Donor CU selects a Donor CU-CP example aiming at IAB1F1AP, initiates a UE context establishing process aiming at IAB1, informs a Donr DU to establish context information aiming at IAB node1, contains IAB-RNTI ID, carries an indicator to indicate the Donor DU, the UE is the IAB node, and the Donor DU can apply functions such as an adaptation layer and the like aiming at a data packet of the IAB.

7-8: may be the same as 6 to 7 of example 5.

9: when IAB node1 tries to establish F1 connection with Donor CU, providing relevant IAB node identification to Donor CU; wherein, the adaptation layer can carry the IAB1 node ID and the IAB-RNTI ID which are newly obtained.

10: when the Donor DU finds the context of the corresponding IAB1 through the IAB-RNTI ID of the adaptation layer, the signaling packet is transmitted to the corresponding Donor CU-CP instance by adopting the F1AP process, such as the UL RRC message transfer message of IAB 1.

11: and the corresponding donor CU-CP instance analyzes the corresponding F1 message through the security decryption processing unit and gives the message to F1AP for processing.

12: IAB1 can provide service for the access UE, and the signaling bearer of the UE is transmitted to Donor through the corresponding SRBx bearers of IAB1 and IAB2, and the signaling data transmission mechanism refers to embodiments 1 and 3.

Based on the same inventive concept, the embodiment of the present invention further provides a service IAB node, an intermediate IAB node, a Donor IAB node, a first-hop IAB node, and a signaling processing apparatus.

When the technical scheme provided by the embodiment of the invention is implemented, the implementation can be carried out as follows.

Fig. 20 is a schematic structural diagram of a serving IAB node, and is shown as including a processor 2000, a memory 2020, and a transceiver 2010, where:

when transmitting the uplink signaling:

a transceiver for receiving and transmitting data under control of the processor, performing the following processes:

transmitting signaling from the mapped bearer;

and/or the presence of a gas in the gas,

when downlink signaling is transmitted:

and/or the presence of a gas in the atmosphere,

when configuring the signaling bearer:

when receiving the wireless parameter configuration for the new SRBx transmitted to the MT part of the service IAB node by the intermediate IAB node, finishing the configuration of the SRB 2/the new SRBx and DRB for OAM;

activating, at the serving IAB node, an F1AP signaling channel for the DU part of the serving IAB node to transmit the F1AP packet to the Donor IAB node over the particular SRB of the MT part of the serving IAB node;

In implementation, when mapping to a specific SRB signaling bearer of a corresponding IAB, the mapping is to a new SRBx of the IAB or to an SRB 1/2/3 of the IAB.

In an implementation, the method further comprises the following steps:

when the serving IAB node establishes an F1 connection with the CU part of the Donor node, the CU part of the Donor node is provided with the relevant IAB node identification.

In implementation, when the relevant IAB node identifier is provided to the CU part of the Donor node, the obtained serving IAB node identifier and IAB-RNTI ID are carried in the adaptation layer for the CU-CP entity of the Donor node to address to the correct PDCP/RRC processing unit, and the new serving IAB node identifier is stored in the corresponding F1AP context for subsequent addressing; or, for the Donor node to find the context of the corresponding serving IAB node through the IAB-RNTI ID of the adaptation layer.

In fig. 20, among other things, the bus architecture may be comprised of any number of interconnected buses and bridges, with one or more processors represented by a processor 2000 and various circuits represented by a memory 2020 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 2010 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 2000 is responsible for managing the bus architecture and general processing, and the memory 2020 may store data used by the processor 2000 in performing operations.

Fig. 21 is a schematic diagram of an intermediate IAB node, which is shown to include a processor 2100, a memory 2120, and a transceiver 2110, where:

when transmitting the uplink signaling:

after RLC, MAC and PHY layer data of the data packet are removed from a DU part of the middle IAB node, the data packet is forwarded to a corresponding MT part selected according to a preset strategy;

transmitting signaling from the mapped bearer;

and/or the presence of a gas in the gas,

when transmitting the downlink signaling:

receiving special SRB data packets transmitted by DU parts of other IAB nodes or Donor IAB nodes at an MT part of the middle IAB node;

after RLC, MAC and PHY layer processing is carried out on the data packet in the DU part of the middle IAB node, the data packet is sent to the MT part of the next-hop IAB node on the SRB signaling bearer of the corresponding IAB node;

and/or the presence of a gas in the gas,

when configuring the signaling bearer:

activating a F1AP signaling channel for the DU part at the intermediate IAB node to transmit the F1AP packet to the Donor IAB node through the specific SRB of the MT part of the intermediate IAB node; or the like, or, alternatively,

when a CU-CP instance of the Donor IAB node constructs an RRC reconfiguration message carrying the radio parameter configuration aiming at the new SRbx and transmits the RRC reconfiguration message to the DU part of the Donor IAB node through F1AP of the middle IAB node, transmitting the radio parameter configuration aiming at the new SRbx to the MT part of the service IAB node;

In the implementation, when configuring the signaling bearer, the method further includes:

In implementation, when the CU part of the Donor IAB node is provided with the relevant IAB node identifier, the obtained intermediate IAB node identifier is carried in the adaptation layer.

In FIG. 21, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 2100, and various circuits of the memory, represented by the memory 2120, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 2110 may be a plurality of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 2100 is responsible for managing the bus architecture and general processing, and the memory 2120 may store data used by the processor 2100 in performing operations.

Fig. 22 is a schematic diagram of a Donor IAB node, which is shown to include a processor 2200, a memory 2220, and a transceiver 2210, where:

when transmitting the uplink signaling:

transmitting the PDU to a CU-CP instance corresponding to a signaling bearer of a first hop IAB node in a DU part of the Donor IAB node, or after finding out pre-selected and stored signaling bearer context information according to adaptation layer information, transmitting the PDU to the CU-CP instance corresponding to the signaling bearer of the first hop IAB node through corresponding SCTP association according to the found mapping relation of the corresponding CU-CP instance, wherein the first hop IAB node is an IAB node providing access to a core network;

and/or the presence of a gas in the atmosphere,

when downlink signaling is transmitted:

receiving the F1AP message at the DU entity of the Donor IAB node;

and/or the presence of a gas in the gas,

when configuring the signaling bearer:

storing the identifier of the IAB node as the identifier CRNTI ID of the UE in the CU-CP example of the Donor IAB node, and completing the corresponding RRC establishment process;

or the like, or, alternatively,

initiating a UE context setup process for an intermediate IAB node after a CU-CP instance of the Donor IAB node establishes a PDU session to download OAM configuration parameters at a serving IAB node; or, the CU part of the Donor IAB selects a CU-CP instance of the Donor IAB aiming at the service IAB and initiates a UE context setup process aiming at the service IAB, informs the DU part of the Donor IAB to establish context information aiming at the service IAB, and carries an indicator to indicate the DU part of the Donor IAB to be the IAB;

after the CU-CP instance of the Donor IAB node receives the UE context setup response, an RRC reconfiguration message carrying the radio parameter configuration aiming at the new SRbx is constructed and is transmitted to the DU part of the Donor IAB node through F1AP of the middle IAB node;

or the like, or, alternatively,

the F1AP information is: after a UE RRC/F1AP processing unit corresponding to a CU-CP instance of a Donor IAB node generates a signaling PDU of the UE, after the signaling PDU is subjected to security encryption operation by a special SRB processing unit of a service IAB node corresponding to the UE, the signaling PDU is sent to a DU entity of the Donor IAB node through an F1AP message of the service IAB node in a container mode, and the F1AP message contains identification information of the SRB of the UE and an IAB-RNTI ID;

In implementation, when the adaptation layer information of the UE signaling bearer is constructed, the method further includes:

In the implementation, in the process of initiating the establishment of the UE context by the CU-CP instance of the Donor IAB node, the DU entity of the Donor IAB node is indicated by an indicator carried in the UE context establishment request message, and the UE is the Donor IAB node.

and receiving the related IAB node identification provided by the intermediate IAB node to the CU part of the Donor IAB node when the F1 connection is required to be established between the intermediate IAB node and the CU part of the Donor IAB node, and storing the related IAB node identification in the context.

In implementation, the related IAB node id provided to the CU part of the Donor IAB node is the intermediate IAB node id obtained by being carried in the adaptation layer.

In implementation, in the process of completing the subsequent RRC establishment by the CU-CP instance of the Donor IAB node, the identifier is carried in the RRC establishment message.

In implementation, in the process that a CU-CP instance of a Donor IAB node initiates a UE context setup for an intermediate IAB node, an indicator is carried to indicate the intermediate IAB node that the UE is the IAB node.

In an implementation, the indicator indicates that the indication is transmitted to the intermediate IAB node through the corresponding F1AP and the special SRBx of the intermediate IAB node.

In an implementation, the method further comprises the following steps:

when the serving IAB node establishes an F1 connection with the CU portion of the Donor node, the receiving serving IAB node provides the associated IAB node identification to the CU portion of the Donor node.

In implementation, when providing a relevant IAB node identifier to a CU part of a Donor node, the obtained serving IAB node identifier and IAB-RNTI ID are carried in an adaptation layer for a CU-CP entity of the Donor node to address to a correct PDCP/RRC processing unit, and a new serving IAB node identifier is stored in a corresponding F1AP context for subsequent addressing; or the like, or, alternatively,

when providing the related IAB node identification for the CU part of the Donor node, the obtained service IAB node identification and the IAB-RNTI ID are carried in the adaptation layer, the DU part of the Donor node finds the context of the corresponding service IAB node through the IAB-RNTI ID of the adaptation layer, the signaling packet is transmitted to the CU-CP instance of the corresponding Donor node by adopting the F1AP process, and the CU-CP instance of the Donor node analyzes the corresponding F1 message and then delivers the F1 message to the F1AP for processing.

In fig. 22, among other things, the bus architecture may include any number of interconnected buses and bridges with various circuits being linked together, particularly one or more processors represented by processor 2200 and memory represented by memory 2220. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 2210 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 2200 is responsible for managing the bus architecture and general processing, and the memory 2220 may store data used by the processor 2200 in performing operations.

Fig. 23 is a schematic structural diagram of a first-hop IAB node, which is shown and includes a processor 2300, a memory 2320, and a transceiver 2310, where:

when transmitting the uplink signaling:

and/or the presence of a gas in the atmosphere,

when transmitting the downlink signaling:

In FIG. 23, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 2300, and various circuits, represented by memory 2320, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 2310 may be a plurality of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 2300 is responsible for managing the bus architecture and general processing, and the memory 2320 may store data used by the processor 2300 in performing operations.

the service IAB node transmits the signaling from the mapped load;

and/or the presence of a gas in the gas,

and/or the presence of a gas in the atmosphere,

the service IAB node acquires the IAB node identifier from the OAM configuration parameters, wherein the identifier is unique under the CU part of each Donor IAB node;

the serving IAB node activates the F1AP signaling channel for the DU part of the serving IAB node to transmit the F1AP packet to the Donor IAB node over the particular SRB of the MT part of the serving IAB node.

a middle uplink signaling transmission module, configured to, when transmitting uplink signaling:

the intermediate IAB node transmits the signaling from the mapped bearer;

and/or the presence of a gas in the gas,

after removing RLC, MAC and PHY layer data of the data packet, the MT part of the middle IAB node forwards the data packet to a corresponding DU part according to the information of an adaptation layer and the pre-stored routing information;

and/or the presence of a gas in the gas,

the middle IAB node activates an F1AP signaling channel for DU part to transmit the F1AP data packet to the Donor IAB node through the specific SRB of the MT part of the middle IAB node; or the like, or, alternatively,

when the CU-CP instance of the Donor IAB node constructs an RRC reconfiguration message carrying the radio parameter configuration for the new SRBx and transmits it to the DU part of the Donor IAB node through F1AP of the intermediate IAB node, the radio parameter configuration for the new SRBx is transmitted to the MT part of the serving IAB node.

and/or the presence of a gas in the atmosphere,

a DU entity of a Donor IAB node receives F1AP information;

and/or the presence of a gas in the gas,

or the like, or a combination thereof,

after the CU-CP example of the Donor IAB node resolves the corresponding F1AP message, saving the identifier in the F1AP message as the identifier of the UE;

a CU-CP example of a Donor IAB node initiates a UE context setup process aiming at an intermediate IAB node after a service IAB node establishes a PDU session to download OAM configuration parameters; or, the CU part of the Donor IAB selects a CU-CP instance of the Donor IAB aiming at the service IAB and initiates a UE context setup process aiming at the service IAB, informs the DU part of the Donor IAB to establish context information aiming at the service IAB, and carries an indicator to indicate the DU part of the Donor IAB that the UE is the IAB;

after the CU-CP instance of the Donor IAB node receives the UE context setup response, it constructs an RRC reconfiguration message carrying radio parameter configuration for the new SRBx, and transmits it to the DU part of the Donor IAB node through F1AP of the middle IAB node.

and/or the presence of a gas in the atmosphere,

the MT part of the first-hop IAB node receives the signaling PDU which is sent by the DU entity of the Donor IAB node and is subjected to RLC/MAC/PHY processing.

The implementation of the device can be referred to the implementation of the corresponding processing method.

For convenience of description, each part of the above-described apparatus is separately described as being functionally divided into various modules or units. Of course, the functionality of the various modules or units may be implemented in the same one or more pieces of software or hardware in practicing the invention.

In summary, in the technical solution provided in the embodiment of the present invention, the main points include:

And the MT of the service IAB configures an adaptation layer of an uplink signaling bearer and finishes mapping to a specific SRBx of the node.

The Donor CU-CP instance or Donor DU configures the adaptation layer of the downlink signalling bearer.

The RRC establishment message sent by the Donor CU-CP to the IAB child node needs to carry the IAB-RNTI ID distributed by the IAB parent node, so that the RRC establishment message can be used as an addressing route when an adaptation layer is added subsequently.

When the IAB node is started as UE to establish RRC connection with the network, the DU part of the father IAB node allocates a unique identifier in the IAB node, such as IAB-RNTI ID, and F1AP is constructed: initial UL RRC message, this identification will be included in the adaptation layer, (optionally also in the F1AP message).

The Donor CU-CP instance initiates UE context setup and RRC reconfiguration procedures to configure the radio parameters for the new SRBx.

The Donor CU needs to select a Donor CU-CP instance for the intermediate IAB node (child node) F1AP and initiate the corresponding UE context setup procedure.

In order for the intermediate IAB node to establish a PDU session to download the relevant configuration parameters for OAM, the Donor CU-CP instance will initiate the UE context setup procedure for its parent IAB node.

The signaling bearer processing scheme under the wireless backhaul network architecture provided by the embodiment of the invention enables signaling bearer mapping and reliable transmission to be correctly performed on each hop of wireless node when a wireless backhaul exists in a 5G network, so as to meet the subsequent requirements of serving UE and data transmission and improve the system management efficiency.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for signaling, comprising:

when transmitting the uplink signaling:

the service IAB node transmits the signaling from the mapped load;

and/or the presence of a gas in the atmosphere,

when transmitting the downlink signaling:

and/or the presence of a gas in the atmosphere,

when configuring the signaling bearer:

2. The method of claim 1, wherein the mapping to a particular SRB signaling bearer of a corresponding IAB is to a new SRBx of the IAB or to an SRB 1/2/3 of the IAB.

3. The method according to claim 1 c h a r a c t e r i z e d i n that the MT part of the serving IAB node constructs adaptation layer information of the F1AP message and adds the IAB node ID of the serving IAB and/or the IAB-RNTI ID of the serving IAB in the adaptation layer information.

4. The method of claim 1, wherein sending the processed F1AP message to a corresponding processing unit for subsequent processing comprises:

when the F1AP message contains RRC container, RLC/MAC/PHY processing is carried out according to SRB ID, and the processed information is sent to UE on the corresponding SRB bearing of the UE;

and when the F1AP message does not contain the RRC container, processing according to the corresponding function of F1.

5. The method of any of claims 1 to 4, further comprising:

6. The method of claim 5 wherein when providing the relevant IAB node identity to the CU part of the Donor node, the obtained serving IAB node identity and IAB-RNTI ID are carried in the adaptation layer for addressing the CU-CP entity of the Donor node to the correct PDCP/RRC processing unit, saving the new serving IAB node identity in the corresponding F1AP context for subsequent addressing; or, for the Donor node to find the context of the corresponding serving IAB node through the IAB-RNTI ID of the adaptation layer.

7. A method for signaling, comprising:

when transmitting the uplink signaling:

the intermediate IAB node transmits the signaling from the mapped bearer;

and/or the presence of a gas in the gas,

when downlink signaling is transmitted:

and/or the presence of a gas in the gas,

when configuring the signaling bearer:

the intermediate IAB node activates the F1AP signaling channel for the DU part to transmit the F1AP packet to the DonorIAB node through the specific SRB of the MT part of the intermediate IAB node; or the like, or, alternatively,

when the CU-CP instance of the donorab node constructs an RRC reconfiguration message carrying the radio parameter configuration for the new SRBx and delivers it to the DU part of the donorab node through F1AP of the intermediate IAB node, the radio parameter configuration for the new SRBx is delivered to the MT part of the serving IAB node.

8. The method of claim 7, wherein in configuring the signaling bearer, further comprising:

when the intermediate IAB node needs to establish an F1 connection with the CU portion of the DonorIAB node, the CU portion of the DonorIAB node is provided with the associated IAB node identification.

9. The method of claim 8 wherein the obtained intermediate IAB node identity is carried in an adaptation layer when providing the related IAB node identity to the CU portion of the donorab node.

10. The method of claim 7 wherein the DU part of the intermediate IAB node is assigned a unique identifier within the serving IAB node for the serving IAB node, under the construction F1 AP: when initial UL RRC message, the identification is contained in the adaptation layer; alternatively, the identification is included in the F1AP message.

11. A method for signaling, comprising:

when transmitting the uplink signaling:

and/or the presence of a gas in the atmosphere,

when downlink signaling is transmitted:

a DU entity of a Donor IAB node receives F1AP information;

and/or the presence of a gas in the atmosphere,

when configuring the signaling bearer:

or the like, or a combination thereof,

after receiving an F1AP message sent by an intermediate IAB node through a special SRBx of the intermediate IAB node, a DU part of the Donor IAB node forwards the message to a CU-CP example of the Donor IAB node through an F1AP message of the intermediate IAB node, wherein the F1AP message contains a unique identifier which is allocated to the service IAB node by the DU part of the intermediate IAB node when the service IAB node is started to establish RRC connection with a network;

12. The method of claim 11, wherein the F1AP information is: after a UE RRC/F1AP processing unit corresponding to a CU-CP instance of a Donor IAB node is generated, carrying out security encryption operation through a special SRB processing unit of a service IAB node corresponding to the UE and adding adaptation layer information, and then sending the security encryption operation to a DU entity of the Donor IAB node through an F1AP message in a container mode, wherein the F1AP message contains identification information of a special SRB;

the DU entity of the Donor IAB node transfers the signaling PDU in the F1AP information to the corresponding SRB load for RLC/MAC/PHY processing according to the identification information of the special SRB;

or the like, or a combination thereof,

13. The method of claim 11 or 12, wherein in constructing adaptation layer information for a UE signaling bearer, further comprising:

14. The method of claim 11, wherein in the process of initiating UE context establishment by a CU-CP instance of a Donor IAB node, an indicator is carried in a UE context establishment request message to indicate a DU entity of the Donor IAB node that the UE is an IAB node.

15. The method of claim 11, wherein the radio parameter configuration for the new SRBx is carried in an RRC reconfiguration message constructed by a CU-CP instance of a Donor IAB node.

16. The method of any of claims 11, 12, 14, 15, wherein in configuring the signaling bearer, further comprising:

17. The method of claim 11 wherein the associated IAB node identity provided to the CU portion of the DonorIAB node carries the obtained intermediate IAB node identity in an adaptation layer.

18. The method of claim 11, wherein the identifier is carried in an RRC setup message when the CU-CP instance of the donoraib node completes a subsequent RRC setup procedure.

19. The method of claim 11 or 18 wherein the DU portion of the intermediate IAB node assigns the serving IAB node a unique identifier within the serving IAB node, as determined by the structure F1 AP: initial UL RRC message, including the identification in the adaptation layer; alternatively, the identification is included in the F1AP message.

20. The method of claim 11, wherein an indicator is carried to indicate to an intermediate IAB node that a UE is an IAB node during a CU-CP instance of a donorab node initiating a UE context setup for the intermediate IAB node.

21. The method of claim 20, wherein the indicator indicates transmission to the intermediate IAB node through the intermediate IAB node's corresponding F1AP and special SRBx.

22. The method of any of claims 11-12, 14-15, 17-18, 20-21, further comprising:

23. The method of claim 22 wherein when providing the relevant IAB node identity to the CU part of the Donor node, the obtained serving IAB node identity and IAB-RNTI ID are carried in the adaptation layer for addressing the CU-CP entity of the Donor node to the correct PDCP/RRC processing unit, saving the new serving IAB node identity in the corresponding F1AP context for subsequent addressing; or the like, or a combination thereof,

24. A method for signaling, comprising:

when transmitting the uplink signaling:

and/or the presence of a gas in the atmosphere,

when downlink signaling is transmitted:

25. A serving IAB node, comprising:

when transmitting the uplink signaling:

transmitting signaling from the mapped bearer;

and/or the presence of a gas in the gas,

when transmitting the downlink signaling:

and/or the presence of a gas in the atmosphere,

when configuring the signaling bearer:

activating, at the serving IAB node, an F1AP signaling channel for the DU part of the serving IAB node to transmit the F1AP packet to the DonorIAB node through the particular SRB of the MT part of the serving IAB node;

26. The node of claim 25, wherein the mapping to a particular SRB signaling bearer for a corresponding IAB is to a new SRBx for the IAB or to an SRB 1/2/3 for the IAB.

27. The node according to claim 25, wherein the MT part of the serving IAB node constructs adaptation layer information of the F1AP message and adds the IAB node ID of the serving IAB, and/or the IAB-RNTI ID of the serving IAB, in the adaptation layer information.

28. The node of claim 25, wherein sending the processed F1AP message to a corresponding processing unit for subsequent processing comprises:

29. The node according to any of claims 25 to 28, further comprising:

30. The node of claim 29, wherein when providing the relevant IAB node identity to the CU portion of the Donor node, the obtained serving IAB node identity and IAB-RNTI ID are carried in an adaptation layer for addressing the CU-CP entity of the Donor node to the correct PDCP/RRC processing unit, saving the new serving IAB node identity in the corresponding F1AP context for subsequent addressing; or, for the Donor node to find the context of the corresponding serving IAB node through the IAB-RNTI ID of the adaptation layer.

31. An intermediate IAB node, comprising:

when transmitting the uplink signaling:

transmitting signaling from the mapped bearer;

and/or the presence of a gas in the gas,

when downlink signaling is transmitted:

and/or the presence of a gas in the atmosphere,

when configuring the signaling bearer:

activating an F1AP signaling channel for the DU part at the intermediate IAB node to transmit the F1AP packet to the DonorIAB node through a specific SRB of the MT part of the intermediate IAB node; or the like, or, alternatively,

32. The node of claim 31, when configuring the signaling bearer, further comprising:

33. The node of claim 32, wherein the obtained intermediate IAB node identity is carried in an adaptation layer when providing the related IAB node identity to the CU portion of the donorab node.

34. The node of claim 31, wherein the DU portion of the intermediate IAB node assigns the serving IAB node a unique identifier within the serving IAB node that is determined by the structure F1 AP: initial UL RRC message, including the identification in the adaptation layer; alternatively, the identification is included in the F1AP message.

35. A donoraib node, comprising:

when transmitting the uplink signaling:

and/or the presence of a gas in the gas,

when downlink signaling is transmitted:

receiving the F1AP message at the DU entity of the Donor IAB node;

and/or the presence of a gas in the atmosphere,

when configuring the signaling bearer:

or the like, or, alternatively,

after receiving an F1AP message sent by an intermediate IAB node through a special SRBx of the intermediate IAB node, a DU part of the Donor IAB node forwards the F1AP message to a CU-CP instance of the Donor IAB node, wherein the F1AP message contains a unique identifier which is allocated to the serving IAB node by the DU part of the intermediate IAB node when the serving IAB node is started up and establishes RRC connection with a network;

initiating a UE context setup process for an intermediate IAB node after a CU-CP instance of the Donor IAB node establishes a PDU session to download OAM configuration parameters at a service IAB node; or, the CU part of the Donor IAB selects a CU-CP instance of the Donor IAB aiming at the service IAB and initiates a UE context setup process aiming at the service IAB, informs the DU part of the Donor IAB to establish context information aiming at the service IAB, and carries an indicator to indicate the DU part of the Donor IAB that the UE is the IAB;

after the CU-CP instance of the Donor IAB node receives the UE context setup response, an RRC reconfiguration message carrying wireless parameter configuration aiming at the new SRBx is constructed and is transmitted to the DU part of the Donor IAB node through F1AP of the middle IAB node;

36. The node of claim 35, wherein the F1AP information is: after a UE RRC/F1AP processing unit corresponding to a CU-CP instance of a Donor IAB node is generated, carrying out security encryption operation by a special SRB processing unit of a service IAB node corresponding to the UE and adding adaptation layer information, and then sending the security encryption operation to a DU entity of the Donor IAB node through F1AP information in a container mode, wherein the F1AP information comprises identification information of a special SRB;

or the like, or, alternatively,

37. The node of claim 35 or 36, in constructing adaptation layer information for a UE signaling bearer, further comprising:

38. The node of claim 35, wherein in the process of initiating UE context establishment by a CU-CP instance of a Donor IAB node, an indicator is carried in a UE context establishment request message to indicate a DU entity of the Donor IAB node that the UE is an IAB node.

39. The node of claim 35, wherein the radio parameter configuration for the new SRBx is carried in an RRC reconfiguration message constructed by a CU-CP instance of a Donor IAB node.

40. The node of any of claims 35-36, 38-39, wherein in configuring the signaling bearer, further comprising:

41. The node of claim 35, wherein the associated IAB node identity provided to the CU portion of the DonorIAB node carries the obtained intermediate IAB node identity in an adaptation layer.

42. The node of claim 35, wherein the identifier is carried in an RRC setup message when the CU-CP instance of the donoraib node completes a subsequent RRC setup procedure.

43. The node of claim 35 or 42, wherein the DU part of the intermediate IAB node assigns the serving IAB node a unique identifier within the serving IAB node, under construction F1 AP: when initial UL RRC message, the identification is contained in the adaptation layer; alternatively, the identification is included in the F1AP message.

44. The node of claim 35, wherein an indicator is carried to indicate to an intermediate IAB node that a UE is an IAB node, in a CU-CP instance of a donorab node initiating a UE context setup for the intermediate IAB node.

45. The node of claim 44, wherein the indicator indication is transmitted to an intermediate IAB node through its corresponding F1AP and special SRBx.

46. The node of any of claims 35-36, 38-39, 41-42, 44-45, further comprising:

47. The node of claim 46, wherein when providing the relevant IAB node identity to the CU part of the Donor node, the obtained serving IAB node identity and IAB-RNTI ID are carried in an adaptation layer for the CU-CP entity of the Donor node to address to the correct PDCP/RRC processing unit, and a new serving IAB node identity is stored in the corresponding F1AP context for subsequent addressing; or the like, or, alternatively,

48. A first hop IAB node, comprising:

when transmitting the uplink signaling:

and/or the presence of a gas in the atmosphere,

when transmitting the downlink signaling:

receiving a signaling PDU (protocol data Unit) which is sent by a DU (protocol data Unit) entity of a Donor IAB node and is subjected to RLC/MAC/PHY (radio link control/physical layer) processing at an MT part of a first-hop IAB node;

49. A signaling processing apparatus, comprising:

the service IAB node transmits the signaling from the mapped load;

and/or the presence of a gas in the atmosphere,

and/or the presence of a gas in the gas,

50. A signaling processing apparatus, comprising:

the intermediate IAB node transmits the signaling from the mapped bearer;

and/or the presence of a gas in the atmosphere,

and/or the presence of a gas in the gas,

51. A signaling processing apparatus, comprising:

and/or the presence of a gas in the gas,

a DU entity of a Donor IAB node receives F1AP information;

and/or the presence of a gas in the atmosphere,

or the like, or a combination thereof,

after receiving an F1AP message sent by an intermediate IAB node through a special SRBx of the intermediate IAB node, a DU part of the Donor IAB node forwards the F1AP message to a CU-CP instance of the Donor IAB node, wherein the F1AP message contains a unique identifier which is allocated to the serving IAB node by the DU part of the intermediate IAB node when the serving IAB node is started and RRC connection is established with a network;

52. A signaling processing apparatus, comprising:

and/or the presence of a gas in the gas,