CN110536351B

CN110536351B - Information processing method in IAB network, IAB and computer storage medium

Info

Publication number: CN110536351B
Application number: CN201910115224.XA
Authority: CN
Inventors: 刁雪莹; 陈琳
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2019-02-15
Filing date: 2019-02-15
Publication date: 2024-06-04
Anticipated expiration: 2039-02-15
Also published as: WO2020164546A1; CN110536351A

Abstract

The embodiment of the invention provides an information processing method in an IAB network, an IAB and a computer storage medium, wherein a first data packet is acquired through a first IAB node; the first IAB node sends the first data packet to an IAB host node, namely the first IAB node realizes the forwarding of the data packet; the IAB node sends the flow control information to the father node, namely the flow control information is sent, so that congestion in the IAB network is relieved; and realizing resource coordination in the IAB network through configuration of the IAB host donor.

Description

Information processing method in IAB network, IAB and computer storage medium

Technical Field

Embodiments of the present invention relate to, but are not limited to, the field of communications technologies, and in particular, but not limited to, an information processing method in an IAB network, an IAB, and a computer storage medium.

Background

As a fifth generation mobile communication network, the 5G network has a peak theoretical transmission speed of tens of Gb per second, which is hundreds of times faster than that of the 4G network. The 5G enables high transmission speeds in the use of millimeter waves. Millimeter waves refer to electromagnetic waves having wavelengths on the order of millimeters and frequencies between about 30GHz and 300 GHz. One characteristic of the millimeter wave band is that attenuation in air is large and diffraction ability is weak. For this purpose, self-access backhaul links (IAB, INTEGRATED ACCESS AND backhaul links) technology is proposed. Through the wireless backhaul link and the relay link, dense NR cell networks can be deployed more flexibly without correspondingly increasing dense deployment of transmission networks. An example of a network with INTEGRATED ACCESS AND backhaul links deployed is shown in fig. 1, where a, B, and C are all access nodes. Wired connection exists between the node A and the core network, and the access nodes B and C send and receive data to the core network through the node A. The user equipment may access nodes a, B, C through ACCESS LINK (access links). The access nodes can transmit data through a wireless backhaul link. An access node in the INTEGRATED ACCESS AND backhaul network that supports wireless access for UEs and that wirelessly transmits data back is referred to as an IAB node (IAB node). And provides a radio backhaul function for the IAB node so that an access node to which the UE is connected with the core network is called an IAB host (IAB node). ACCESS LINK and backhaul links may use the same or different carrier frequencies. In addition, supporting CU/DU split deployment is an important technical feature in NR, and thus it is also necessary to support the IAB function in the CU/DU split deployment scenario. FIG. 2 is a schematic diagram of an IAB deployment scenario with CU/DU separation. As shown in fig. 2, where the IAB node may have DU-like functions and MT-like functions, where MT part is also UE-like function. The IAB node accesses two parent IAB nodes via a dual connection.

Aiming at the problem of information transmission in an IAB scene, no effective solution exists at present.

Disclosure of Invention

The information processing method and the IAB computer storage medium in the IAB network provided by the embodiment of the invention mainly solve the technical problem of how to realize information transmission in an IAB scene.

In order to solve the above technical problems, an embodiment of the present invention provides an information processing method in an IAB network, including:

Acquiring a first data packet from an access and backhaul first IAB node;

and the first IAB node sends the first data packet to an IAB host donor.

The embodiment of the invention also provides an information processing method in the IAB network, which comprises the following steps: the IAB node sends the flow control information to the parent node. The IAB node accessed by the IAB node in connection identity is called a father IAB node

The embodiment of the invention also provides an information processing method in the IAB network, which comprises one of the following steps:

The IAB host donor CU sends downlink information to the IAB host donor DU;

the IAB host donor CU sends downlink information to the IAB node;

the father IAB node transmits the downlink information to the IAB node;

the downlink information message includes an RRC message, or an F1AP message.

The embodiment of the invention also provides an information processing method in the IAB network, which comprises the step of sending information from the IAB node of the access backhaul link to the IAB node of the next hop.

The embodiment of the invention also provides an IAB, which is characterized in that the IAB comprises a processor, a memory and a communication bus, wherein:

the communication bus is used for realizing connection communication between the processor and the memory;

the processor is configured to execute one or more computer programs stored in the memory to implement at least one step of the information processing method in the IAB network as described above.

Embodiments of the present invention also provide a computer storage medium storing one or more programs executable by one or more processors to implement at least one step in an information processing method in an IAB network as described above.

The beneficial effects of the invention are as follows:

According to the information processing method, the IAB and the computer storage medium in the IAB network, which are provided by the embodiment of the invention, a first data packet is acquired through a first IAB node; the first IAB node sends the first data packet to an IAB host node, namely the first IAB node realizes the forwarding of the data packet; the IAB node sends the flow control information to the father node, namely the flow control information is sent, so that congestion in the IAB network is relieved; the IAB host donor CU sends downlink information to the IAB host donor DU; the IAB host donor CU sends downlink information to the IAB node; the father IAB node transmits the downlink information to the IAB node; the downlink information message comprises an RRC message or an F1AP message; and the resource coordination in the IAB network is realized through the transmission of the downlink information.

Additional features and corresponding advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic diagram of a network of INTEGRATED ACCESS AND backhaul links of the background of the invention;

FIG. 2 is a diagram of an IAB deployment scenario featuring iCU/DU separation in accordance with the background of the invention;

fig. 3 is a flow chart of an information processing method in an IAB network according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a CP protocol stack design of alternative 2 according to the fifth embodiment of the present invention;

fig. 5 is a schematic diagram of an uplink control signaling forwarding process according to a fifth embodiment of the present invention;

fig. 6 is a downlink control signaling forwarding process according to a fifth embodiment of the present invention;

FIG. 7 is a schematic diagram of a CP protocol stack design of alternative 4 according to the sixth embodiment of the present invention;

fig. 8 is a schematic diagram of an uplink control signaling forwarding process according to a sixth embodiment of the present invention;

Fig. 9 is a downlink control signaling forwarding process according to a sixth embodiment of the present invention;

FIG. 10 is a schematic diagram of a hop-by-hop flow control according to embodiment eight of the present invention;

fig. 11 is a schematic diagram of bearer mapping between a terminal bearer and a backhaul BH RLC bearer according to an eighth embodiment of the present invention;

Fig. 12 is a schematic diagram of bearer mapping between backhaul BH RLC bearers according to an eighth embodiment of the present invention;

fig. 13 is a schematic diagram of an IAB switching scenario according to a tenth embodiment of the present invention;

Fig. 14 is a schematic diagram of an IAB structure according to an eleventh embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the embodiments of the present invention is given with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Embodiment one:

In order to solve the problem of sending an IAB scene packet, this embodiment provides an information processing method in an IAB network, as shown in fig. 3, where the information processing method in an IAB network includes:

s301, acquiring a first data packet from the access and return first IAB node.

In the embodiment of the present invention, the first IAB node acquires a first data packet, where the first data packet may be an RRC message sent by the UE received by the first IAB node, or an RRC message generated by the first IAB node itself MT, or an F1AP message generated by the first IAB node itself DU.

It should be noted that, after the first IAB node acquires the first data packet, an adaptation layer packet header may also be added to the first data packet, where the adaptation layer packet header includes at least one of the following information: target node information; IAB node identification information; the IAB node generates and/or forwards control signaling/data carrying mark information; the control plane to which the first data packet belongs carries an identifier. For example, adding an adaptation layer packet header including an IAB donor as a target node to the first data packet; for example, an adaptation layer packet header including signaling carrying flag information forwarded by the IAB node is added to the first data packet.

S302, the first IAB node sends the first data packet to an IAB host donor.

It will be appreciated that the first IAB node may be directly connected to the IAB node or may be connected to the IAB node through other intermediate IAB nodes. Thus, the first IAB node may send the first packet directly to the IAB host node; the first data packet sent by the first IAB node is forwarded to the IAB host node through one or more intermediate nodes, for example, after the IAB node 1 acquires the first data packet, the first data packet is forwarded to the IAB host node through the IAB node 2 and the IAB node 3.

In this embodiment of the present invention, after the IAB host donor receives the first data packet sent by the IAB node, the IAB host donor may further encapsulate the first data packet into an F1AP message, where the F1AP message includes: IAB node identification corresponding to the encapsulated PDCP PDU and bearing identification information.

Embodiment two:

in order to solve the problem of flow control, this embodiment provides an information processing method in an IAB network, where the information processing method includes

The first IAB node sends the flow control information to the parent node.

In the embodiment of the invention, the IAB node accessed by the IAB node in the connection identity is called a father IAB node. The flow control information includes at least one of the following information: one or more bearer identities; one or more logical channel identifications; user Equipment (UE) identification or node identification information of an IAB node; the required cache size desired buffer size information; required data rate DESIRED DATA RATE information; flow control indication. It may be understood that the first IAB node may send the flow control information corresponding to the IAB node, or may send the flow control information corresponding to the UE.

Wherein the required cache size desired buffer size information includes at least one of the following: the required buffer size desired buffer size corresponding to the bearer or logical channel of the UE; the bearing of the IAB node or the buffer size corresponding to the logic channel; the required data rate DESIRED DATA RATE information, including at least one of: the required data rate DESIRED DATA RATE for the bearer or logical channel of the UE; and the data rate DESIRED DATA RATE corresponding to the bearer or the logic channel of the IAB node.

Embodiment III:

in order to achieve resource coordination of an IAB, this embodiment provides an information processing method in an IAB network, where the information processing method in the IAB network includes:

The IAB host donor CU sends downlink information to the IAB host donor DU;

Or, the IAB host donor CU sends downlink information to the IAB node;

or, the father IAB node forwards the downlink information to the IAB node.

Wherein the downlink information message is an RRC message, or an F1AP message.

In the embodiment of the invention, the IAB host donor DU and the IAB node can be directly connected or can be connected to the IAB node through other intermediate IAB nodes, so that when the IAB host donor CU sends downlink information to the IAB node, the IAB host donor CU can send the downlink information to the IAB host donor DU, and the IAB host donor DU forwards the downlink information to the IAB node; or the IAB host donor CU sends the downlink information to the IAB host donor DU, and the IAB host donor DU forwards the downlink information to a next-hop node through one or more hops, and forwards the downlink information to the IAB node through the next-hop node.

Notably, when the downlink information includes an F1AP message, the IAB host donor CU generates the F1AP message and then sends the F1AP message to the IAB node; the F1AP message includes at least one of the following information: target node information; f1AP message bearing identification information on the control surface; IAB host donor DU configuration information; IAB node DU configuration information.

Wherein the IAB donor DU configuration information includes: the IAB host donor DU receives the mapping relation between the IP address and the IAB node DU identifier, and can perform corresponding ADAPT LAYER encapsulation, so that the IAB host donor DU can obtain the IAB node DU identifier according to the IP address, and further send downlink information to the IAB node; or, the routing table of the IAB host donor DU includes mapping relation between the destination IP address and the identifier of the next-hop IAB node, so that the downlink information may be sent to the corresponding IAB node.

In the embodiment of the present invention, the configuration information of the IAB node DU includes: the configuration information of the IAB node DU can be used for determining the child BH link and uplink and downlink resource allocation on CHILD ACCESS LINK by the DU according to the D-H, D-S, U-H, U-S, F-H, F-S and non-available indication corresponding to each symbol resource of the IAB node DU.

In some embodiments, after the parent IAB node forwards the downlink information to the IAB node, the parent IAB node DU adds an adaptation layer packet header to the downlink information, where the adaptation layer packet header includes: MT termination information.

It is noted that when the downlink information includes an RRC message, the IAB host donor CU generates an RRC message, and sends the RRC message to the IAB node, where the RRC message includes at least one of the following information: the semi-static frame structure of the IAB node comprises a frame structure configuration of a cell-specific and a UE-specific; semi-static resource configuration of the IAB node, such as type 2 for DL,type 1 and 2 for UL; the semi-static frame structure of the terminal UE comprises, for example, cell-specific and UE-specific frame structure configuration and semi-static resource configuration; the IAB host donor CU coordinates the IAB node resources by means of the RRC message.

Example IV

The information processing method in the IAB network provided by the embodiment of the invention comprises the following steps:

And the IAB node sends information to the next-hop IAB node of the IAB node.

In the embodiment of the invention, when the IAB node comprises an IAB, the next hop node is an IAB host node; for example, when the IAB node includes an IAB parent node, the next-hop node is an IAB node, for example, when the IAB node sends the information to the IAB host node; for example, the IAB host node sends information to the IAB node.

In the embodiment of the invention, according to different information, the IAB node sends different information to the next-hop IAB node of the IAB node. When the information includes that an upstream message (such as upstream control information or upstream data) generated and/or forwarded by the IAB carries flag information, the upstream message generated and/or forwarded by the IAB carries flag information including: the self-adaptive sub-head of the IAB node carries indication information whether the self-adaptive sub-head is MT signaling or not and/or indication information whether the self-adaptive sub-head is forwarding signaling or not; it can be appreciated that when the indication information of the MT signaling is included, it means that the uplink control signaling/uplink data is IAB generated; when the indication information of forwarding signaling is included, it indicates that the uplink control signaling/uplink data is that the IAB forwards other IABs. The upstream message generated and/or forwarded by the IAB may further include: the self-adaptive sub-header of the next-hop IAB node carries the identification information of the IAB node and SRB corresponding to the encapsulated control signaling. For example, the IAB1 sends first information to the IAB2, where the first information includes indication information about whether the MT is signaled and/or indication information about whether the MT is signaled; and the IAB2 sends second information to the IAB3, wherein the second information comprises the identification information of the IAB node and the SRB corresponding to the encapsulated control signaling. The identification information of the IAB node and the SRB in some embodiments includes at least one of: gNB-CU UE F1AP ID, gNB-DU UE F1AP ID, C-RNTI and NCGI of MT, SRB ID information.

In some embodiments, the IAB node includes an IAB counter, and the information includes flag information carried by a downlink message generated and/or forwarded by the IAB; the IAB generates and/or forwards the downlink message carrying mark information which comprises that the IAB donor CU carries the SRB mark corresponding to the embedded F1AP message in the F1AP message; the IAB node identifier comprises an IAB node DU identifier or collocated IAB node MT identifier; it can be understood that the F1AP layer refers to an F1AP of an F1-C interface between a donor DU and a donor CU, and further, after an IAB donor DU receives an F1AP message sent by an IAB donor CU, an IAB donor DU receives the F1AP message, analyzes an IAB node identifier and the SRB identifier contained in the layer; and encapsulating the IAB node identifier and the SRB identifier in the self-adaptive sub-header, and forwarding the F1AP message to a next-hop IAB node. I.e. after receiving the F1AP message, the IAB donor DU realizes the routing forwarding function according to the SRB identifier and the IAB node identifier and forwards the result to the next-hop IAB node.

It is noted that, after the IAB node identifier and the SRB identifier are encapsulated in the adaptive sub-header and the F1AP message is forwarded to the next-hop IAB node, the next-hop AB node, after receiving the data packet sent by the IAB donor DU, determines that the IAB node identifier is inconsistent with itself, and the next-hop IAB node delivers the RRC message contained in the parsed F1AP message to the adaptation layer; in some embodiments, after the next-hop IAB node delivers the RRC message included in the parsed F1AP message to the adaptation layer, the next-hop IAB node adds an MT termination indication in the adaptation layer sub-header. In some embodiments, when the target IAB node identification information is consistent with the target IAB node identification information, delivering the uplink data packet generated and/or forwarded by the IAB to the SRB indicated by the adapt to perform PDCP decryption, and then delivering the uplink data packet to the F1AP entity corresponding to the IAB node2 DU to analyze the content of the F1AP message.

In the embodiment of the invention, the information can also be flow control information, which is used for relieving congestion in the IAB network; wherein the flow control information includes: the terminal UE bears LCID, desired buffer size and/or data rate corresponding to the IAB node; at this time, after the IAB node sends information to the IAB node of the next hop, the IAB node of the next hop receives the flow control information, determines that the size desired buffer size of the remaining buffer is 0, and stops scheduling the data of the logical channel; and/or determining that the remaining buffer size desired buffer size is greater than 0, calculating the total amount of data from tx_next_ack-1 for RLC AM mode; for RLC UM mode, the amount of data to be scheduled for transmission is calculated.

In some embodiments, the flow control information includes whether the adaptation layer carries flow control information present or directly indicates whether DESIRE DATA RATE and/or desired buffer size are present. At this time, it is noted that, the sending information of the IAB node to the next-hop IAB node of the IAB node includes that the flow control information sends the required buffer size DESIRED DATA RATE to the next-hop IAB node after the IAB node detects that a buffer carried by a certain UE or backhaul BH RLC CHANNEL exceeds a given threshold; or, the IAB node detects that the buffer size of the corresponding backhaul BH RLC CHANNEL is smaller than a given threshold, and sends a flow control stop instruction to the next-hop IAB node; or, the IAB node detects that the buffer size of the corresponding backhaul BH RLC CHANNEL is smaller than a given threshold, and sets desired buffer size or DESIRED DATA RATE to a maximum allowable value.

In some embodiments, the flow control information includes desired buffer size and/or DESIRED DATA RATE of a terminal bearer or a backhaul BH RLC bearer; in some embodiments, the flow control information may include terminal identification information, such as UE and DRB identification information, in addition to flow control information including desired buffer size and/or DESIRED DATA RATE of the terminal bearer or backhaul BH RLC bearer.

In some embodiments, when the IAB node learns that downlink data transmitted by a backhaul BH RLC bearer of a terminal is in proportion to the total transmission data amount of a BH RLC bearer mapped with the terminal, the flow control information includes a quotient of desired buffer size and the transmission data amount, or a quotient of DESIRED DATA RATE and DESIRED DATA RATE. In some embodiments the streaming information comprises the sum of desired buffer size or DESIRED DATA RATE of all terminal bearers mapped to the BH RLC bearer.

Fifth embodiment:

In the embodiment of the invention, taking the CP protocol stack design based on the alternative 2, under the condition that the IAB node performs adaptation processing on the self-generated data packet and the forwarded data, carrying information in the F1AP message and the adaptation subheader as an example, the IAB network control signaling processing method is described; as shown in fig. 4, fig. 4 is a schematic diagram of a CP protocol stack design of an alternative 2, fig. 4 (a) shows an RRC message transmission process of a UE, fig. 4 (b) shows an RRC message transmission process of an MT, and fig. 4 (c) shows a process of an F1-AP of a DU. It can be understood that, if the RRC message generated by the IAB node 1MT part performs the adaptive ADAPT LAYER processing, the RRC signaling of the MT and the signaling forwarded by the IAB node 1 may multiplex the same SRB for transmission, and based on the above-mentioned alternative 2, when the IAB node performs ADAPT LAYER processing on the packet generated by itself, the uplink control signaling forwarding processing is as shown in fig. 5:

S501, the ADAPT LAYER subheader of the IAB node 2MT part carries indication information for distinguishing control signaling.

In the embodiment of the present invention, IAB node 1 can process the control signaling sent from fig. 4 (a) and fig. 4 (b) by IAB node 2, in order to distinguish two different types of signaling by IAB node 1, by carrying, at ADAPT LAYER, indication information for distinguishing the control signaling, and for each uplink packet, carrying, in ADAPT LAYER subheader, indication information whether the uplink packet is MT signaling or is an indication of forwarding signaling, so that IAB node 1 performs distinguishing processing. For example, if IAB node 1 receives an uplink packet 1 of IAB node 2, and the ADAPT LAYER sub-header of IAB node 2MT part includes an indication that the uplink packet 1 is MT signaling, it indicates that the uplink packet 1 is data generated by IAB node 2 itself; similarly, when ADAPT LAYER subheader contains an indication that the uplink data packet 1 is a forwarding signaling, it means that the uplink data packet 1 is a data packet of the UE forwarded by the IAB node 2.

S502, the F1AP message of the IAB donor CU carries the identification information of the IAB node MT and the SRB corresponding to INNER PDCP PDU.

In the embodiment of the invention, for IAB donor CU-CP, in order to deliver the PDCP PDU of the inner layer in the F1AP message to the correct PDCP entity, wherein the F1AP layer refers to the F1AP of the F1-C interface between the donor DU and the donor CU, and the F1AP message carries the identification information of IAB node MT and SRB corresponding to INNER PDCP PDU. It should be understood that the Donor DU may acquire the identification information of the IAB node and the SRB through ADAPT LAYER, that is, the Donor DU acquires the identification information of the IAB node and the SRB and carries the identification information in the F1AP message, and sends the identification information to the IAB Donor CU-CP.

It should be noted that the identification information of the IAB node and the SRB includes any one of the following:

gNB-CU UE F1AP ID2, gNB-DU UE F1AP ID2 and SRB ID information corresponding to INNER PDCP PDU of MT 2 carried in IAB node 2 adapt layer;

The C-rnti+ NCGI of the IAB node MT of IAB node DU collocated creating the F1AP message, and the SRB ID information corresponding to INNER PDCP PDU, carried in IAB node 2 adapt layer.

S503, the IAB donor CU delivers the uplink data packet to the corresponding F1AP entity.

In the embodiment of the present invention, the uplink data packet is delivered to the corresponding F1AP entity in step 502, that is, the uplink data packet is delivered to the F1AP entity according to the information carried in the F1AP message. In the initial F1 interface establishment phase, the IAB donor CU needs to associate the IAB node 2DU with the IAB node 2MT part, so the F1 setup request establishment request message may further include the C-RNTI corresponding to the IAB node 2MT part and the corresponding NR CGI information, in addition to carrying the gNB DU ID. In some embodiments, the localized gNB DU ID is carried in the RRC signaling sent by the IAB node 2MT part to the IAB donor CU.

Based on the alternative 2, when the IAB node performs ADAPT LAYER processing on the packet generated by itself, the downlink control signaling forwarding processing is as shown in fig. 6:

S601, after the IAB node CU generates a control signaling intended to be transmitted to the IAB node2DU, it is determined which SRB of the control signaling map collocated IAB node MT needs to be forwarded.

S602, delivering the IAB donor CU to a PDCP entity corresponding to SRB of collocated IAB node MT for encryption.

S603, the IAB donor CU map and deliver the PDCP PDU to an F1-C interface between the IAB donor CU and the IAB donor DU to carry out F1AP encapsulation, and the F1AP message carries an SRB identifier and an IAB node identifier corresponding to the embedded F1AP message.

In the embodiment of the invention, the IAB node identifier may be an IAB node DU identifier or a corresponding IAB node MT identifier.

S604, after the IAB donor DU receives the F1AP signaling, the IAB node identifier and the corresponding SRB identifier contained in the IAB donor DU are analyzed.

In the embodiment of the invention, the IAB node identifier and the corresponding SRB identifier are contained in ADAPT HEADER in the subsequent analysis processing for the routing forwarding function; i.e. the IAB donor sends F1AP signaling to the IAB node 2MT according to the information carried by ADAPT HEADER. It should be noted that, in order to ensure that the F1AP signaling is successfully sent, the identifier type information carried by ADAPT LAYER needs to be consistent with the routing table.

S605, after IAB node 2MT receives the F1AP signaling, determining different processing procedures according to the IAB node identification contained in ADAPT LAYER.

Notably, when the target IAB node identification information contained in ADAPT LAYER is consistent with the target IAB node identification information, the F1AP signaling is delivered to the SRB indicated by the adapt to perform PDCP decryption, and then delivered to the F1AP entity corresponding to the IAB node2DU to analyze the content of the F1AP message.

When the target IAB node identification information contained in ADAPT LAYER is inconsistent with the target IAB node identification information, the IAB node DU delivers the RRC message contained in the parsed F1AP message to ADAPT LAYER, that is, the RRC message is continuously delivered to IAB node2, and a new ADAPT LAYER is added, at this time ADAPT HEADER only needs to indicate whether the message is MT TERMINATED or not, and no other routing information needs to be carried.

It should be noted that whether the IAB node CP protocol stack of the alternative 2 is adopted or not may be configured by the operator. For example, when the IAB node DU establishes an F1 connection with the IAB donor CU, the IAB node DU acquires PDCP based security an indication configuration from the operator, and adopts alternative 2. In some embodiments, it may also be considered that the IAB node DU reports PDCP and/or DTLS based security capability indications to the CU to determine whether to employ alternative 2.

Example six:

In the embodiment of the invention, taking the design of a CP protocol stack based on an alternative 4, under the condition that an IAB node performs adaptation processing on self-generated data packets and forwarded data, carrying information in an F1AP message and an adaptation subheader as an example, an IAB network control signaling processing method is described; as shown in fig. 7, fig. 7 is a schematic diagram of a CP protocol stack design of an alternative 4, fig. 7 (a) shows an RRC message transmission process of a UE, fig. 7 (b) shows an RRC message transmission process of an MT, and fig. 7 (c) shows a process of an F1-AP of a DU. It can be understood that if the RRC message generated by the IAB node 1MT part performs ADAPT LAYER processing, the RRC signaling of the MT and the signaling forwarded by the IAB node 1 may multiplex the same SRB for transmission, and based on the above-mentioned alternative 4, when the IAB node performs ADAPT LAYER processing on the data packet generated by itself, the uplink control signaling forwarding processing is as shown in fig. 8:

and S801, carrying indication information for distinguishing control signaling in ADAPT LAYER sub-heads of the IAB node 2MT part.

In the embodiment of the present invention, for each uplink packet, the ADAPT LAYER sub-header of the IAB node 2MT part needs to include an indication to inform whether the IAB node1 delivers the uplink packet to the F1AP layer or performs the forwarding operation. The indication information includes an indication of whether the uplink data packet is MT signaling or whether it is forward signaling. When ADAPT LAYER includes an instruction for forwarding signaling, indicating that the uplink data packet is an uplink data packet of the IAB node2 forwarding UE, and performing a forwarding operation; when ADAPT LAYER includes an indication of MT signaling, it indicates that the uplink packet is an uplink packet generated by IAB node2 itself, and is delivered to the F1AP layer.

S802, IAB node1 adds the target DU information to ADAPT HEADER.

In the embodiment of the present invention, the IAB node1 completes the F1AP message encapsulation, DTLS, SCTP, IP, and the encapsulation of an adapt, where the adapt may include target DU information (e.g. indicates a certain donor DU, such as the donor DU in fig. 7). In some embodiments, the target DU identification information is configured by the donor CU when configuring the routing table for the access IAB node; corresponding one or more target donor DU identification information can be carried at the adapt.

S803, the IAB donor DU receives the uplink data packet, if the target DU information in ADAPT HEADER is consistent with the target DU information, ADAPT HEADER is removed, and then the uplink data packet is sent to the IAB donor CU.

S804, after the IAB donor CU receives the uplink data packet, the uplink data packet is analyzed, and after the F1AP message is analyzed, the corresponding IAB node DU is confirmed according to the gNB-CU UE F1AP ID and the gNB-DU UE F1AP ID contained in the F1AP message, and corresponding processing is carried out.

In the embodiment of the invention, during the initial F1 interface establishment stage, the IAB donor CU needs to associate the IAB node DU with the IAB node MT part, so that the IAB DU status indication, the C-RNTI of the corresponding MT and the NR CGI corresponding to the MT accessed cell can be considered to be carried in the F1 setup request message. In some embodiments, the localized gNB DU ID is carried in the RRC signaling sent by the IAB node 2MT part to the IAB donor CU.

In some embodiments, based on the alternative 4, the IAB node DU may directly carry the IAB DU status indication in the transmitted F1setup request, along with the C-RNTI of the corresponding MT and the NR CGI corresponding to the MT-accessed cell. In addition to carrying this information in the F1AP message, it is also contemplated to carry the allocated gNB DU ID in the RRC signaling sent by the IAB node 2MT part to the IAB donor CU.

Based on the alternative 4, when the IAB node performs ADAPT LAYER processing on the packet generated by itself, the downlink control signaling forwarding processing is as shown in fig. 9:

S901, after generating a control signaling which is planned to be sent to an intermediate IAB node DU, the IAB node CU generates a corresponding F1AP message, performs STLS, SCTP and IP header encapsulation, and then sends the information to the IAB node DU through IP routing.

It can be understood that the IAB donor CU receives a data packet forwarded by the IAB donor DU before the data packet corresponds to the intermediate IAB node DU as the source IP, so the IP routing table may record corresponding reverse routing information accordingly.

S902, after receiving the IP data packet, the IAB donor DU carries out corresponding processing.

In the embodiment of the invention, the IAB donor DU is identified by destination IAB node DU according to the IP address in the IP route and is encapsulated in ADAPT HEADER, wherein the IAB donor DU is configured with the mapping relation between the IP address and the IAB node DU identification.

In some embodiments, the routing table of the IAB donor DU contains mapping relation of the destination IP address and next hop IAB node DU/MT ID, and the IAB donor DU sends the control signaling to the IAB node of the next hop according to the IP address information until forwarding to the IAB node DU with the IP address consistent with the destination IP address.

It should be noted that whether the IAB node CP protocol stack of the alternative 4 is adopted or not may be configured by the operator. For example, when the IAB node DU establishes an F1 connection with the IAB donor CU, the IAB node DU acquires DTLS based security an indication configuration from the operator, and adopts alternative 4. In some embodiments, it may also be considered that the IAB node DU reports PDCP and/or DTLS based security capability indications to the CU to determine whether to employ alternative 4.

Example seven

In the embodiment of the present invention, taking the congestion of the long term existing in the IAB network link as an example, the congestion of the long term is relieved.

Notably, for long term congestion, the mitigation schemes that the IAB network may take include any of the following:

Mode one: the DU sends flow control information to the CU to relieve congestion. The flow control information includes an indication CU overload; it can be understood that, when the CU creates a new DRB for the UE, the DU performs admission control, and for the already admitted bearer and the corresponding data transmission, when congestion exists in the IAB link, the DU indicates to the CU that the traffic is over-loaded, and the CU correspondingly adopts overload reduction action load shedding operation; in some embodiments, the flow control signaling includes that the DU requests to release a certain UE context, i.e. the DU can also detect which GBR probes currently cannot meet the requirements and inform the CU, and finally, the DU can actively release the context of a certain UE, etc. In some embodiments, the flow control signaling includes informing the CU that a certain DRB cannot meet QoS requirements, i.e., when the DU performs admission control, if the air interface resource cannot meet requirements, the DU may directly inform the CU that which DRBs cannot be successfully created.

Mode two: the CU sends the following flow control signaling to the NGC to alleviate the congestion. When radio resource unavailable (radio resources are not available), the flow control signaling includes a CU requesting release of a context of a certain UE; in some embodiments, the flow control signaling includes CU sending PDU session resource notify informing the NGC that the QoS requirements of a certain GBR QoS flow/PDU session cannot be met, and may even need to be released; in some embodiments, the flow control signaling includes the CU requesting modification of an already established PDU session.

Mode three: and adjusting the network topology according to the long term congestion condition in the current IAB network to relieve the congestion. In the embodiment of the invention, the CU switches certain IAB node MTs to other parent DUs according to measurement report and DU overload indication; in some embodiments, when the route includes cost information cost metric, the design of cost metric may embody congestion, thereby embodying potential latency; for example, a path with a smaller cost metric has less congestion; therefore, when the IAB node transmits data, a path with a smaller cost metric is selected for the IAB node, which corresponds to a path with less congestion, thereby achieving the effect of load balancing.

Example eight:

in the embodiment of the present invention, taking congestion of short term m existing in an IAB network link as an example, congestion of short term m is relieved, specifically, a hop-by-hop flow control is taken as an example, as shown in fig. 10, and fig. 10 is a schematic diagram of the hop-by-hop flow control. It will be appreciated that for short term congestion, which typically occurs on a forwarding path of a certain hop, it is unlikely that the entire forwarding path is congested, whereas hop by hop flow control is used for flow control information between intermediate IAB nodes within a hop, and is therefore more suitable for handling short term congestion.

It should be appreciated that the hop-by-hop flow control includes a 1:1 bearer mapping mechanism and an N:1 bearer mapping mechanism. At this time, when the 1:1 bearer mapping mechanism is adopted, for congestion of short term, the mitigation scheme that the IAB network may take includes any one of the following:

Mode one: the UE bearer sends the flow control information to the parent IAB through the MAC CE, and allocates a special LCID for the MAC CE. In the embodiment of the present invention, the LCID indicates flow control information. The MAC CE includes LCID, desired buffer size and/or data rate corresponding to the parent IAB link corresponding to the UE pointer.

In the embodiment of the present invention, the flow control information may be sent desired buffer size after the IAB node DU detects that a buffer of a certain DRB or BH RLC CHANNEL exceeds a given threshold, and after the parent IAB receives the flow control information, resources are allocated to the LCID. It is noted that the manner in which parent IABs allocate resources varies depending on the desired buffer size values. E.g., desired buffer size is 0, parent IAB node DU stops scheduling the data for the logical channel; if desired buffer size is greater than 0, calculating the total amount of data from TX_Next_Ack-1 for RLC AM mode; for RLC UM mode, the data size to be scheduled for transmission is calculated.

In some embodiments, if the IAB node DU detects that the buffer size of the corresponding BH RLC CHANNEL is less than the given threshold, the flow control is stopped by the LCID in the flow control information; or, the IAB node DU sets desired buffer size or DESIRED DATA RATE to the maximum allowable value. Of course, in some embodiments, the flow control stop may be indicated by the LCID when the IAB node no longer needs to perform the flow control.

Mode two: the IAB node sends ADAPT LAYER carrying flow control related information to parent IAB node DU. In the embodiment of the invention, the IAB node may send the flow control information through the adaptation layer. The IAB node adds a ADAPT LAYER control message to a corresponding carried packet to be forwarded to parent IAB node DU, where the ADAPT LAYER control message is added only when a flow control indication is performed, and it should be noted that a bit needs to be added at ADAPT LAYER to indicate whether flow control information exists or directly indicate whether DESIRE DATA RATE and/or desired buffer size exists. It should be appreciated that Parent IAB node DU parses the flow control information and then submits it to the MAC layer for use in assisting scheduling decisions. Notably, the sending of the flow control information specifically includes the following ways:

Mode one: the flow control information is sent desired buffer size after the IAB node DU detects that the buffer of a DRB or BH RLC CHANNEL exceeds a given threshold, and if desired buffer size is 0, the parent IAB node stops sending data at RLC CHANNEL. Otherwise, the data is sent according to the specified buffer size.

Mode two: and if the IAB node DU detects that the buffer size of the corresponding BH RLC CHANNEL is smaller than the given threshold, a flow control stop instruction is sent.

Mode three: the IAB node DU detects that the buffer size of the corresponding BH RLC CHANNEL is smaller than the given threshold, sets the buffer size to the maximum allowable value, and sends DESIRED DATA RATE to the parent node. In some embodiments, the flow control termination indication is sent when flow control is no longer needed.

It should be understood that the N:1 bearer mapping mechanism includes a bearer mapping between the terminal bearer and the backhaul BH RLC bearer; and bearer mapping between BH RLC bearers, when bearer mapping between a terminal bearer and a backhaul BH RLC bearer is adopted, as shown in fig. 11, UE1 DRB1 and UE2 DRB1 are mapped to BH RLC bearer 1, and UE1 DRB2 is mapped to BH RLC bearer 2, where for congestion of short term, the relief scheme that the IAB network may take includes any one of the following:

mode one: the IAB node 1MT sends to the IAB node 2DU flow control information corresponding to desired buffer size and/or DESIRED DATA RATE of the UE1 DRB 1. Note that the flow control information is sent through an adaptation corresponding to BH RLC bearer1 or indicated in the MAC CE to correspond to BH RLC bearer1.

Mode two: the IAB node 1MT sends the flow control information to the IAB node 2DU, when the IAB node 2DU knows the UE bearer information corresponding to each data packet in the RLC buffer area of the BH RLC bearer1, when the IAB node 1MT sends the flow control information corresponding to desired buffer size and/or DESIRED DATA RATE of the UE1 DRB1, the flow control information further comprises UE1 and DRB identification information, and the flow control information can be sent through an adapter corresponding to the BH RLC bearer1 or indicates the flow control information corresponding to the BH RLC bearer1 in the MAC CE.

When the IAB node 2DU receives this information, it is determined that the amount of data that can be scheduled for transmission corresponding to the UE1 DRB1 is decided by desired buffer size or DESIRED DATA RATE.

Mode three: when the IAB node 1DU can sense the ratio (x%) of the downlink data transmitted through the UE 1 DRB1 to the total transmission data amount of the BH RLC bearer 1, the IAB node 1mt sends the flow control information to the IAB node 2DU, where the flow control information includes a quotient of desired buffer size and the ratio of the transmission data amount, or a quotient of DESIRED DATA RATE and DESIRED DATA RATE.

Mode four: if congestion occurs in a certain UE DRB, the IAB node 1MT counts the sum of desired buffer size/DESIRED DATA RATE of all UE DRBs mapped to the BH RLC bearer, and sends flow control information to the IAB node 2DU, wherein the flow control information comprises the sum of desired buffer size or DESIRED DATA RATE of all UE DRBs mapped to the BH RLC bearer.

It should be noted that, in the embodiment of the present invention, when using the mapping between BH RLC beams, as shown in fig. 12, BH RLC beam 3 and BH RLC beam 5 map to BH RLC beam 1, and BH RLC beam 4 maps to BH RLC beam 2, where for short term congestion, the alleviating scheme that the IAB network may adopt includes any one of the following:

Mode one: the flow control information sent by the IAB node 2MT to the IAB node 3DU may be sent through an adaptation corresponding to the BH RLC bearer1 when the flow control information corresponds to desired buffer size and/or DESIRED DATA RATE of the BH RLC bearer 3, or may be indicated in the MAC CE to correspond to the BH RLC bearer 1.

Mode two: when the IAB node 3DU knows the corresponding UE pointer information in each data packet in the RLC buffer of the BH RLC pointer 1, and the IAB node 2MT sends the flow control information to the IAB node 3DU, where the flow control information corresponds to desired buffer size and or DESIRED DATA RATE of the BH RLC pointer 3, the flow control information further includes one or more UE pointer identification information mapped to the BH RLC pointer 3. The flow control information may be transmitted through an adaptation corresponding to BH RLC bearer1 or indicated in the MAC CE to correspond to BH RLC bearer 1. In some embodiments, the indication may also be reported by RRC signaling.

When the IAB node 3DU receives the information, it determines the amount of data that the corresponding UE bearer set can schedule for transmission, and determines it from desired buffer size or DESIRED DATA RATE.

Mode three: when the IAB node 2DU senses the ratio (x%) of the downlink data transmitted through the BH RLC bearer 3 to the total transmission data amount of the BH RLC bearer 1, the IAB node 2MT transmits to the IAB node 3DU, the flow control information including a quotient of desired buffer size and the ratio of the transmission data amount, or a quotient of DESIRED DATA RATE and DESIRED DATA RATE.

Mode four: when congestion occurs in a certain downstream BH RLC bearer, the IAB node 2MT counts the sum of desired buffer size or DESIRED DATA RATE mapped to downstream BH RLC bearer corresponding to upstream BH RLC bearer1 and sends it to the IAB node 3DU.

Example nine:

In the embodiment of the invention, centralized resource coordination is performed on the IAB donor CU. The IAB node DU can report CELL SPECIFIC and the frame structure configuration of UE specific to the CU, and the CU selects and configures the frame structures of CELL SPECIFIC and UE specific proper for the IAB node DU according to the report of the DU and the resource configuration condition of the current IAB network. Specifically, the DU sends the slot format of the cell-specific to the CU through the F1setup message or the gNB-DU configuration update message, and optionally, the DU sends the slot format of the IAB node MT or the UE specific of the UE to the CU through the UE context modification required message. Thus, the IAB donor CU may send resource coordination information to the DU, configuring the resources for the DU.

When the resource coordination information includes F1AP information, the CU transmits D-H, D-S, U-H, U-S, F-H, F-S, and non-available indications corresponding to respective symbol resources of the DU to the DU through the F1 AP.

In the embodiment of the invention, the IAB donor CU can carry the DU resource configuration in an F1interface management message (such as F1 setup response, gNB-CU configuration update) sent to the IAB node DU part through the F1 AP. The DU resource configuration is indicated by the per-cell. This configuration is used for upstream and downstream communication and resource allocation of CHILD LINK of the IAB node DU part. The F1AP information belongs to F1 signaling of non-UE specific. The resource indication can be used for determining uplink and downlink resource allocation on child BH link and CHILD ACCESS LINK by DU;

The IAB node DU part needs to know which slots corresponding to child IAB node DU part of the accesses are not available time resource and which are soft resources, so that the IAB node DU part can control whether these soft resources (time resources type may be D, U or F) are available to CHILD LINK of child IAB node DU part through display and/or implicit control. The IAB donor DU and the IAB node DU can determine uplink and downlink resources available for CHILD LINK according to the semi-static frame structure and the resource indication sent by the CU through the F1AP, so as to perform corresponding resource allocation.

When the resource coordination information includes RRC information. In the embodiment of the invention, the CU can configure a semi-static frame structure for the IAB node MT part through RRC signaling, and the semi-static frame structure comprises cell-specific and UE-specific frame structure configurations; or, the CU may send a semi-static resource configuration (type 2 for DL,type 1 and 2 for UL) to the IAB node MT part through RRC signaling. The configuration is used for uplink and downlink communication and resource allocation between IAB node MT parts and PARENT LINK; or, the CU may configure a semi-static frame structure for normal UEs through RRC signaling, including cell-specific and UE-specific frame structure configuration and semi-static resource configuration.

In some embodiments, the DU may also perform resource configuration for its serving MT or normal UE through resource coordination information, where the resource coordination information may also include L1 signaling information. For example, an IAB donor DU sends SFI to its served IAB node MT and normal UE through L1 signaling to perform dynamic slot format configuration and DCI/UCI scheduling to perform dynamic resource allocation; for example, the Parent IAB node/node DU sends SFI or other frame structure configuration information to its serving IAB node MT via L1 signaling, which is used to adjust the frame structure and resource configuration of the co-localized IAB node DU CHILD LINK. In some embodiments, after the IAB node DU indicates F through Flexible symbol on SFI CHILD LINK, a corresponding indication may be sent to its parent IAB node through its co-located IAB node MT, and at this time, the parent IAB node may use the corresponding resource to perform uplink or downlink transmission. The IAB donor DU and the IAB node DU can determine uplink and downlink resources available for CHILD LINK according to the dynamic frame structure indication and the resource indication sent by the parent node through the L1 signaling, so as to perform corresponding resource configuration.

In the embodiment of the invention, the specific slot format configuration can be unified and coordinated by the CU, in addition, the DU can send some proposal information, and the CU performs centralized configuration on the basis. For an F subframe configured by an IAB node DU, if a certain hop link configures it as a downlink/downlink resource, none of the adjacent higher and lower hops parent IAB node DU and child IAB node MT can use the resource anymore. Thus, both D/U and F need to be interleaved with INA in hop order. On the other hand, if parent IAB node DU determines that the resources are sufficient and there are more idle slots, the soft resources of the corresponding IAB node DU may be indicated as available on the slots.

Examples ten

The embodiment of the invention describes the switching of three scenes of an intra-DU, an intra-CU and an inter-CU: as shown in figure 13 of the drawings,

S1301, the IAB node performs measurement reporting on the current accessed parent IAB node.

S1002, the report result is transmitted to the IAB donor CU through the forwarding of the parent node and the intermediate node. If the IAB donor CU determines that the handover condition is met, then TARGET PARENT IAB DUs may be selected for the IAB node MT.

S1303, after the handover preparation, the IAB donor CU sends a handover command to the IAB node MT

After receiving the handover command, the IAB node MT may identify the slot format according to the frame structure configuration of the UE specific included in the handover command, and then execute the random access procedure to TARGET PARENT IAB DU.

It can be appreciated that when the IAB switches or RLF occurs, the resource configuration is affected; since the parent IAB DU changes, the frame format of the IAB node DU should also need to be updated. In the embodiment of the invention, after the IAB node MT finishes switching, the IAB donor CU sends gNB CU configuration update a message to the associated IAB node DU, and updates the frame structure configuration of the DU part for the IAB donor CU. Note that the frame structure format configuration corresponding to the IAB node DU includes the configuration of cell-specific and UE specific. For the frame format configuration of UE specific, it may be sent by the CU to the accessed UE or child IAB node MT through RRC signaling. Whereas for the CELL SPECIFIC configuration, the conventional NR specification is determined by the DU and contained in SIB1, the CU is informed by the DU. In the IAB scenario, the IAB donor CU may send the frame structure configuration of the IAB node DU through an F1 setup response message or gNB CU configuration update message. The corresponding IAB node DU may assemble or update SIB1 system information and broadcast the transmission.

In some embodiments, when sending a handover command to an IAB node, the RRC reconfiguration message in the IAB node CU already includes a frame structure format configuration corresponding to the IAB node DU. Thus, the delay caused by the change of the IAB node DU frame structure can be reduced, and the interference is reduced.

After the frame structure format of the IAB node DU is updated, SIB1 of the IAB node DU may change, and in addition, UE specific frame formats of all child IAB nodes and child UEs served by the IAB node DU may also change, and the corresponding frame formats of GRANDCHILD DU may also change. For this problem, it is recommended to choose the same parent IAB node as hop order. In addition, if the frame format changes, the system information is immediately validated after being updated.

In the embodiment of the invention, when the RLF occurs in the IAB node, the IAB node may consider selecting a new parent IAB node to attempt to reconstruct, and when the IAB node is successfully reconstructed, the updated UE specific frame structure configuration corresponding to the IAB node MT and/or the cell-specific resource configuration of the IAB node DU may be obtained from the new parent IAB node.

If the scene is NR-NR DC, the donor CU configures disjoint UE specific frame formats for IAB node MT on the PCell and the SCell.

Example eleven:

the present embodiment also provides an IAB, as shown in fig. 14, which includes an IAB including a processor 1401, a memory 1402, and a communication bus 1403, wherein:

A communication bus 1403 is used to enable connected communication between the processor 1401 and the memory 1402;

The processor 1401 is configured to execute one or more computer programs stored in the memory 1402 to implement at least one step of the information processing method in the IAB network in the embodiments described above.

The present embodiments also provide a computer storage medium including volatile or nonvolatile, removable or non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, computer program modules or other data. Computer storage media includes, but is not limited to, RAM (Random Access Memory ), ROM (Read-Only Memory), EEPROM (ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY, charged erasable programmable Read-Only Memory), flash Memory or other Memory technology, CD-ROM (Compact Disc Read-Only Memory), digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer.

The computer storage medium in this embodiment may be used to store one or more computer programs, where the stored one or more computer programs may be executed by a processor to implement at least one step of the information processing method in the IAB network in each of the above embodiments.

The present embodiment also provides a computer program product comprising computer readable means having stored thereon a computer program as shown above. The computer readable means in this embodiment may comprise a computer storage medium as shown above.

It will be apparent to one skilled in the art that all or some of the steps of the methods, systems, functional modules/units in the apparatus disclosed above may be implemented as software (which may be implemented in computer program code executable by a computing apparatus), firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit.

Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, computer program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and may include any information delivery media. Therefore, the present invention is not limited to any specific combination of hardware and software.

The foregoing is a further detailed description of embodiments of the invention in connection with the specific embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims

1. An information processing method in a self-access backhaul link (IAB) network, comprising: the IAB node sends information to the next-hop IAB node of the IAB node; the IAB node comprises an IAB host, and the information comprises flag information carried by downlink information generated and/or forwarded by the IAB node;

the IAB node sends information to the next-hop IAB node of the IAB node, and the information comprises the following steps: the IAB host CU carries an SRB identifier and an IAB node identifier corresponding to the embedded F1AP message in the F1AP message, wherein the IAB node identifier comprises an IAB node DU identifier or a juxtaposed IAB node MT identifier; the IAB host CU sends the F1AP message to an IAB host DU; after the IAB host DU receives the F1AP message, an IAB node identifier and the SRB identifier contained in the IAB host DU are analyzed; and encapsulating the IAB node identifier and the SRB identifier in the self-adaptive sub-header, and forwarding the F1AP message to the next-hop IAB node through an intermediate node.

2. The method for processing information in an IAB network according to claim 1, wherein the information includes flag information carried in an upstream message generated and/or forwarded by an IAB node;

the generation and/or forwarding of the uplink message by the IAB node carries flag information, which includes:

The self-adaptive sub-head of the IAB node carries indication information whether the self-adaptive sub-head is MT signaling or not and/or indication information whether the self-adaptive sub-head is forwarding signaling or not;

The self-adaptive sub-header of the next-hop IAB node carries the identification information of the IAB node and SRB corresponding to the encapsulated control signaling.

3. The method for processing information in an IAB network of claim 1, wherein said encapsulating the IAB node identifier and the SRB identifier in the adaptive sub-header, after forwarding the F1AP message to the next-hop IAB node via the intermediate node, includes:

And after the next-hop IAB node receives the F1AP message, when the IAB node identification is determined to be inconsistent with the IAB node identification, the next-hop IAB node delivers the RRC message contained in the parsed F1AP message to an adaptation layer.

4. The method for processing information in an IAB network according to claim 3, wherein after the next-hop IAB node delivers the RRC message included in the parsed F1AP message to the adaptation layer, the method includes:

And adding an MT termination instruction in the sub-header of the adaptation layer by the next-hop IAB node.

5. An IAB node comprising a processor, a memory, and a communication bus, wherein:

The processor is configured to execute one or more computer programs stored in the memory to implement the steps in the information processing method in an IAB network according to any one of claims 1-4.

6. A computer readable storage medium storing one or more programs executable by one or more processors to implement the steps in the method of information processing in an IAB network according to any one of claims 1-4.