WO2020164546A1 - Method for processing information in iab network, iab, and computer storage medium - Google Patents

Method for processing information in iab network, iab, and computer storage medium Download PDF

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Publication number
WO2020164546A1
WO2020164546A1 PCT/CN2020/075101 CN2020075101W WO2020164546A1 WO 2020164546 A1 WO2020164546 A1 WO 2020164546A1 CN 2020075101 W CN2020075101 W CN 2020075101W WO 2020164546 A1 WO2020164546 A1 WO 2020164546A1
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WIPO (PCT)
Prior art keywords
iab
iab node
information
node
donor
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PCT/CN2020/075101
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French (fr)
Chinese (zh)
Inventor
陈琳
刁雪莹
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中兴通讯股份有限公司
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Priority claimed from CN201910115224.XA external-priority patent/CN110536351B/en
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2020164546A1 publication Critical patent/WO2020164546A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0289—Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • the embodiment of the present invention relates to the field of communication technology, for example, to an information processing method in an IAB network, an IAB and a computer storage medium.
  • 5G network has a theoretical peak transmission speed of up to tens of Gb per second, which is hundreds of times faster than that of 4G network.
  • the reason why 5G can achieve high transmission speed is the use of millimeter waves.
  • Millimeter waves refer to electromagnetic waves with wavelengths on the order of millimeters, and their frequencies are approximately between 30 GHz and 300 GHz.
  • One of the characteristics of the millimeter wave frequency band is that the attenuation in the air is large, and the diffraction ability is weak. For this reason, self-access backhaul links (IAB, integrated access and backhaul links) technology has been proposed.
  • IAB integrated access and backhaul links
  • FIG. 1 An example of a network deployed with integrated access and backhaul links is shown in Figure 1, where A, B, and C are all access nodes. There is a wired connection between node A and the core network, and access nodes B and C send and receive data to the core network through node A. User equipment can access nodes A, B, and C through an access link. Data can be transmitted between access nodes through a wireless backhaul link.
  • IAB node An access node in a network of integrated access and backhaul links that supports user equipment (User Equipment, UE) wireless access and performs wireless backhaul of data is called an IAB node (IAB node).
  • the access node that provides the wireless backhaul function for the IAB node so that the UE connects to the core network is called an IAB donor (IAB donor).
  • IAB donor The access node that provides the wireless backhaul function for the IAB node so that the UE connects to the core network.
  • IAB donor IAB donor
  • Access link and backhaul link can use the same or different carrier frequencies.
  • support for centralized unit (CU)/distributed unit (DU) separate deployment is an important technical feature in NR, so it is also necessary to support the IAB function in the CU/DU separate deployment scenario.
  • Figure 2 is a schematic diagram of an IAB deployment scenario with CU/DU separation.
  • the IAB node can have a DU-like function and a mobile terminal (Mobile Terminal, MT)-like function, and the MT part is also a UE-like function.
  • the IAB node accesses two parent IAB nodes through dual connections.
  • the information processing method in the IAB network and the IAB computer storage medium provided by the embodiments of the present invention solve the problem of how to realize information transmission in the IAB scenario.
  • the embodiment of the present invention provides an information processing method in an IAB network, including:
  • the first IAB node sends the first data packet to the IAB host donor.
  • the embodiment of the present invention also provides an information processing method in an IAB network, which includes: an IAB node sends flow control information to a parent node.
  • the IAB node accessed by the IAB node as the connection identity is called the parent IAB node
  • the embodiment of the present invention also provides an information processing method in an IAB network, including one of the following:
  • 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 parent IAB node forwards downlink information to the IAB node
  • the downlink information message includes a radio resource control (Radio Resource Control, RRC) message, or an F1 Application Protocol (F1 Application Protocol, F1AP) message.
  • RRC Radio Resource Control
  • F1 Application Protocol F1 Application Protocol
  • the embodiment of the present invention also provides an information processing method in an IAB network, which includes the self-access backhaul link IAB node sending information to the next hop IAB node of the IAB node.
  • An embodiment of the present invention also provides an IAB, which is characterized in that the IAB includes a processor, a memory, and a communication bus, wherein:
  • the communication bus is used to realize the connection and 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 in the information processing method in the IAB network as described above.
  • An embodiment of the present invention also provides a computer storage medium, the computer storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the above-mentioned IAB network At least one step in an information processing method.
  • the first data packet is acquired through the first IAB node; the first IAB node sends the first data packet to the IAB host donor, that is, the first The IAB node realizes the forwarding of data packets; the flow control information is sent to the parent node through the IAB node, that is, the flow control information is sent, thereby alleviating the congestion in the IAB network; the IAB host donor CU sends the downlink information to the IAB host donor DU; the IAB host The donor CU sends downlink information to the IAB node; the parent IAB node forwards the downlink information to the IAB node; the downlink information message includes an RRC message or an F1AP message; realizes resource coordination in the IAB network by sending downlink information.
  • Figure 1 is a schematic diagram of a network of integrated access and backhaul links
  • Figure 2 is a schematic diagram of an IAB deployment scenario with CU/DU separation
  • FIG. 3 is a schematic flowchart of an information processing method in an IAB network according to the first embodiment of the present invention
  • FIG. 4 is a schematic diagram of a control plane (CP) protocol stack design of an alternative 2 (alternative 2) of the fifth embodiment of the present invention
  • FIG. 5 is a schematic diagram of uplink control signaling forwarding processing according to Embodiment 5 of the present invention.
  • FIG. 6 is the forwarding processing of downlink control signaling according to Embodiment 5 of the present invention.
  • FIG. 7 is a schematic diagram of the design of the CP protocol stack of alternative 4 in the sixth embodiment of the present invention.
  • FIG. 8 is a schematic diagram of uplink control signaling forwarding processing according to Embodiment 6 of the present invention.
  • FIG. 9 is the forwarding processing of downlink control signaling according to Embodiment 6 of the present invention.
  • FIG. 10 is a schematic diagram of hop-by-hop flow control according to Embodiment 8 of the present invention.
  • FIG. 11 is a schematic diagram of bearer mapping between terminal bearers and Backhaul Radio Link Control (BH RLC) bearers according to Embodiment 8 of the present invention.
  • BH RLC Backhaul Radio Link Control
  • FIG. 12 is a schematic diagram of bearer mapping between BH RLC bearers according to Embodiment 8 of the present invention.
  • FIG. 13 is a schematic diagram of an IAB handover scenario according to Embodiment 10 of the present invention.
  • FIG. 14 is a schematic diagram of the structure of an IAB according to Embodiment 11 of the present invention.
  • this embodiment provides an information processing method in an IAB network.
  • the information processing method in the IAB network includes:
  • the first IAB node obtains the first data packet.
  • the first data packet may be the RRC message sent by the UE received by the first IAB node, or the RRC message generated by the MT of the first IAB node itself, or the first data packet.
  • the adaptation layer header includes at least one of the following information: target node information; IAB node identifier Information; the control signaling/data carried by the IAB node generated and/or forwarded carries flag information; the control plane to which the first data packet belongs bears the identity. For example, adding an adaptation layer header including the IAB donor for the first data packet; for example, adding an adaptation layer header including flag information for signaling forwarded by the IAB node to the first data packet.
  • the first IAB node sends the first data packet to an IAB host donor.
  • the first IAB node may be directly connected to the IAB donor, or may be connected to the IAB donor through other intermediate IAB nodes. Therefore, the first IAB node can directly send the first data packet to the IAB host donor; the first data packet sent by the first IAB node is forwarded to the IAB host donor through one or more intermediate nodes, for example, the IAB node 1 obtains the first data packet. After a data packet, it is forwarded to the IAB host donor through IAB node 2 and IAB node 3.
  • the IAB host donor may also encapsulate the first data packet into an F1AP message, and the F1AP message includes: the encapsulated packet data convergence protocol (Packet Data Convergence Protocol, PDCP) Protocol Data Unit (Protocol Data Unit, PDU) corresponding to the IAB node identification and bearer identification information.
  • PDCP Packet Data Convergence Protocol
  • PDU Protocol Data Unit
  • this embodiment provides an information processing method in the IAB network.
  • Information processing methods in the IAB network include
  • the first IAB node sends flow control information to the parent node.
  • the IAB node accessed by the IAB node as the connection identity is called the parent IAB node.
  • the flow control information includes at least one of the following information: one or more bearer identifiers; one or more logical channel identifiers; user equipment UE identifiers or node identification information of IAB nodes; required buffer size information; required Data rate desired data rate information; flow control indication. It is understandable that the flow control information sent by the first IAB node may be flow control information corresponding to the IAB node, or flow control information corresponding to the user equipment UE.
  • the required buffer size information includes at least one of the following: the required buffer size corresponding to the UE bearer or logical channel; the required buffer size corresponding to the bearer of the IAB node or the logical channel; required
  • the data rate desired data rate information includes at least one of the following: a desired data rate corresponding to a UE's bearer or logical channel; a desired data rate corresponding to the bearer or logical channel of the IAB node.
  • this embodiment provides an information processing method in an IAB network.
  • the information processing method in the IAB network includes: IAB host donor CU sends downlink information to IAB host donor DU; or, IAB host donor CU sends downlink Information to the IAB node; or, the parent IAB node forwards the downlink information to the IAB node.
  • the downlink information message is an RRC message or an F1AP message.
  • the IAB host donor DU can be directly connected to the IAB node, or it can be connected to the IAB node through other intermediate IAB nodes, so when the IAB host donor CU sends downlink information to the IAB node, it can be the IAB host donor
  • the CU sends downlink information to the IAB host donor DU, and forwards the downlink information to the IAB node through the IAB host donor DU; or the IAB host donor CU sends the downlink information to the IAB host donor DU, and the IAB host donor DU
  • the downlink information is sent to the next hop node after one or more hops, and the downlink information is forwarded to the IAB node through the next hop node.
  • the IAB host donor CU sends the F1AP message to the IAB node after generating the F1AP message;
  • the F1AP message includes at least one of the following information: target node information; control plane bearer identification to which the F1AP message belongs Information; IAB host donor DU configuration information; IAB node DU configuration information.
  • the configuration information of the IAB donor DU includes: the IAB host donor DU receives the mapping relationship between the Internet Protocol (IP) address and the IAB node DU identifier, so that the corresponding adapt layer can be encapsulated, so the IAB host donor DU can be based on IP
  • IP Internet Protocol
  • the address is identified by the IAB node DU, and then the downlink information is sent to the IAB node; or, the routing table of the IAB host donor DU contains the mapping relationship between the destination IP address and the next hop IAB node identifier, and the downlink information can be sent to the corresponding The IAB node.
  • the IAB node DU configuration information includes: DH, DS, UH, US, FH, FH, and FS corresponding to each symbol resource of the IAB node DU, not available indication, the IAB node DU configuration
  • the information can be used for DU to determine the uplink and downlink resource allocation on the child BH link and child access link.
  • the parent IAB node DU adds an adaptation layer header to the downlink information, and the adaptation layer header includes: MT termination information.
  • the IAB donor CU when the downlink information includes an RRC message, the IAB donor CU generates an RRC message, and sends the RRC message to the IAB node.
  • the RRC message includes at least one of the following information: the semi-static frame of the IAB node
  • the structure for example, includes cell-specific (cell-specific) and UE-specific frame structure configurations; the semi-static resource configuration of the IAB node, for example, type 2 for Down Link (type 2 for DL) ), type 1 and 2 for uplink (Up Link, UL); the semi-static frame structure of the terminal UE, such as cell-specific and UE-specific frame structure configuration and semi-static resource configuration; and then the IAB donor CU
  • the IAB node resources are coordinated through the RRC message.
  • An embodiment of the present invention provides an information processing method in an IAB network, and the information processing method in an IAB network includes:
  • the IAB node sends information to the next hop IAB node of the IAB node.
  • the IAB node includes any one of UE, IAB node DU, IAB node MT, IAB child node, IAB node, IAB parent node, and IAB host donor.
  • the next hop node is the IAB host donor; for example, when downlink information is sent, when the IAB node includes the IAB parent node, the next hop node is the IAB node, for example, the IAB node sends information to the IAB host donor; and For example, the IAB host donor sends information to the IAB node.
  • the information sent by the IAB node to the next hop IAB node of the IAB node is also different.
  • the uplink message generated and/or forwarded by the IAB carries flag information including: whether the adaptive subheader of the IAB node carries It is the indication information of MT signaling, and/or whether it is the indication information of forwarding signaling; it is understandable that when the indication information of MT signaling is included, it means that the uplink control signaling/uplink data is generated by IAB;
  • the instruction information for forwarding signaling is included, it indicates that the uplink control signaling/uplink data is forwarded by the IAB to other IABs.
  • the uplink message generated and/or forwarded by the IAB may also include flag information: the adaptive subheader of the next-hop IAB node carries the encapsulated control signaling corresponding to the IAB node and signaling radio bearer (Sigaling Radio Bearer, SRB) identification information.
  • SRB Signaling Radio Bearer
  • IAB1 sends first information to IAB2, and the first information includes information indicating whether it is MT signaling, and/or whether it is forwarding signaling;
  • IAB2 sends second information to IAB3, and the second information includes encapsulation The identification information of the IAB node and SRB corresponding to the control signaling.
  • the identification information of the IAB node and the SRB includes at least one of the following: gNB-CU UE F1AP identification (Identifier, ID), gNB-DU UE F1AP ID, MT) cell radio network temporary identity (Cell-Radio) Network Temporary Identifier (C-RNTI) and NR Cell Global Identifier (NCGI), SRB ID information.
  • ID gNB-CU UE F1AP identification
  • gNB-DU UE F1AP ID gNB-DU UE F1AP ID
  • MT cell radio network temporary identity
  • C-RNTI Cell-Radio Network Temporary Identifier
  • NCGI NR Cell Global Identifier
  • the IAB node includes an IAB donor, and the information includes the downlink message generated and/or forwarded by the IAB carries flag information; the downlink message generated and/or forwarded by the IAB carries flag information including the IAB donor CU carried in the F1AP message
  • the IAB donor DU After the IAB donor DU receives the F1AP message, it parses out the IAB node identifier and the SRB identifier contained inside; The adaptation subheader encapsulates the IAB node identifier and the SRB identifier, and forwards the F1AP message to the next hop IAB node. That is, after the IAB donor DU receives the F1AP message, it implements the routing and forwarding function according to the SRB identifier and the IAB node identifier, and forwards it to the next hop IAB node.
  • the next hop AB node receives the data sent by IAB donor DU After the packet, when it is determined that the IAB node identifier is inconsistent with itself, the next hop IAB node will deliver the RRC message contained in the parsed F1AP message to the adaptation layer; in some embodiments, the next hop IAB node will parse it out After the RRC message contained in the F1AP message is delivered to the adaptation layer, the next-hop IAB node adds an MT termination indication in the adaptation layer subheader.
  • the uplink data packet generated and/or forwarded by the IAB is delivered to the SRB indicated by adapt for PDCP decryption, and then delivered to the F1AP entity pair corresponding to the IAB node2 DU
  • the F1AP message content is analyzed.
  • the information may also be flow control information, which is used to relieve congestion in the IAB network; where the flow control information includes: the terminal UE bearer or the LCID corresponding to the IAB node, the desired buffer size, and/or data rate; at this time, after the IAB node sends information to the next hop IAB node of the IAB node, the next hop IAB node receives the flow control information, determines the remaining buffer size, the desired buffer size value is 0, and stops scheduling the logic Channel data; and/or determine that the remaining buffer size desired buffer size is greater than 0, for RLC acknowledged mode (Acknowledged Mode, AM), calculate the total amount of data from TX_Next_Ack-1; for RLC unacknowledged mode (UM), follow Calculation of the amount of data to be dispatched.
  • RLC acknowledged mode Acknowledged Mode, AM
  • the flow control information includes whether there is flow control information carried by the adaptive layer, or directly indicates whether there is a desired data rate and/or whether there is a desired buffer size.
  • the IAB node sending information to the next hop IAB node of the IAB node includes that the IAB node detects that the buffer of a certain UE bearer or BH RLC channel (channel) exceeds a given threshold.
  • One-hop IAB node sends the required buffer size desired data rate; or, the IAB node detects that the buffer size of the corresponding BH RLC channel is less than a given threshold, and sends a flow control stop instruction to the next-hop IAB node; or, the IAB node detects If the buffer size of the corresponding BH RLC channel is less than the given threshold, set the desired buffer size or desired data rate to the maximum allowable value.
  • the flow control information includes the desired buffer size and/or desired data rate carried by the terminal or BH RLC; in some embodiments, the flow control information includes the desired buffer size and/or desired data rate carried by the terminal or BH RLC. In addition to the buffer size and/or desired data rate, it may also include terminal identification information, such as UE and data radio bearer (Data Radio Bearer, DRB) identification information.
  • terminal identification information such as UE and data radio bearer (Data Radio Bearer, DRB) identification information.
  • the flow control information when the IAB node learns the ratio of the downlink data transmitted by the terminal carrying the BH RLC bearer to the overall transmission data volume of the BH RLC bearer mapped to the terminal, the flow control information includes the ratio of the desired buffer size to the transmission data volume. Quotient, or the quotient of desired data rate and desired data rate. In some embodiments, the flow control information includes the sum of the desired buffer size or desired data rate of all terminals that are mapped to the BH RLC bearer.
  • the IAB node adapts the data packets it generates and the data forwarded, and carries it in the F1AP message and the adapt subheader.
  • the information is taken as an example to describe the IAB network control signaling processing method; as shown in Figure 4, Figure 4 is a schematic diagram of the alternative CP protocol stack design, Figure 4(a) shows the UE’s RRC message sending process. Figure 4(b) shows the RRC message transmission processing of the MT, and Figure 4(c) shows the processing of the F1-AP of the DU.
  • the adapt layer subheader of the MT part carries indication information for distinguishing control signaling.
  • IAB node 1 can process the control signaling sent by IAB node 2 from Figure 4(a) and Figure 4(b).
  • the adapt layer subheader By carrying indication information for distinguishing control signaling in the adapt layer, for each uplink data packet, the adapt layer subheader carries the indication information of whether the uplink data packet is MT signaling or whether it is an indication of forwarding signaling, Let IAB node1 perform differentiated processing.
  • IAB node 1 receives uplink data packet 1 of IAB node 2, and the adapt layer subheader of IAB node 2 MT part contains an indication that the uplink data packet 1 is MT signaling, it means that the uplink data packet 1 is IAB The data generated by node 2 itself; in the same way, when the adapt layer sub-header contains the indication that the uplink data packet 1 is forwarding signaling, it means that the uplink data packet 1 is a data packet of the UE forwarded by IAB node 2.
  • the F1AP message of the IAB donor CU carries identification information of the IAB node MT and SRB corresponding to the inner PDCP PDU.
  • the F1AP layer refers to the F1AP of the F1-C interface between the donor DU and the donor CU,
  • the F1AP message carries the identification information of the IAB node MT and SRB corresponding to the inner PDCP PDU.
  • the donor DU can obtain the identification information of the IAB node and SRB through adapt layer, that is, the donor DU obtains the identification information of the IAB node and SRB, and carries it in the F1AP message and sends it to the IAB donor CU-CP .
  • identification information of IAB node and SRB includes any one of the following:
  • the IAB donor CU delivers the uplink data packet to the corresponding F1AP entity.
  • the uplink data packet is delivered to the corresponding F1AP entity after step 502, that is, the uplink data packet is delivered to the F1AP entity according to the information carried in the F1AP message.
  • IAB donor CU needs to associate IAB node 2 DU with IAB node 2 MT part. Therefore, in addition to the gNB DU ID in the F1 setup request message, it can also include the corresponding IAB node 2 MT part. C-RNTI and corresponding NR CGI information.
  • the collocated gNB DU ID is carried in the RRC signaling sent by the IAB node 2 MT part to the IAB donor CU.
  • the IAB donor CU After the IAB donor CU generates the control signaling that is planned to be sent to the IAB node2 DU, it determines which SRB of the collocated IAB node 2 MT to forward the control signaling to.
  • the IAB donor CU delivers to the collocated IAB node 2 PDCP entity corresponding to the SRB for encryption.
  • the IAB donor CU maps and delivers the PDCP PDU to the F1-C interface between the IAB donor CU and the IAB donor DU for F1AP encapsulation, and carries the SRB identifier and the IAB node identifier corresponding to the embedded F1AP message in the F1AP message.
  • the IAB node identifier may be the IAB node DU identifier or the corresponding IAB node MT identifier.
  • the IAB donor DU After receiving the F1AP signaling, the IAB donor DU parses out the IAB node identifier and the corresponding SRB identifier contained inside.
  • the IAB donor includes the IAB node identifier and the corresponding SRB identifier in the adapt header (header) after the parsing process, which is used for the routing and forwarding function; that is, the IAB donor adds the F1AP to the information carried in the adapt header.
  • the signaling is sent to IAB node 2 MT. It should be noted that in order to ensure the successful transmission of F1AP signaling, the identification type information carried by the adapt layer needs to be consistent with the routing table.
  • the IAB node 2 MT After the IAB node 2 MT receives the F1AP signaling, it determines different processing procedures according to the IAB node identifier included in the adapt layer.
  • the F1AP signaling will be delivered to the SRB indicated by the adapt for PDCP decryption, and then delivered to the F1AP entity corresponding to the IAB node2DU to analyze the content of the F1AP message. .
  • the IAB node DU When the target IAB node identification information contained in the adapt layer is inconsistent with itself, the IAB node DU will deliver the RRC message contained in the parsed F1AP message to the adapt layer, that is, continue to deliver the RRC message to IAB node2 and add a new adapt layer. At this time, the adapt header only needs to indicate whether the message is MT terminated, and no other routing information is required.
  • whether to use the alternative 2 IAB node CP protocol stack can 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 obtains the PDCP-based security indication configuration from the operator, and uses alternative 2. In some embodiments, it may also be considered that the IAB node DU reports the PDCP and/or Datagram Transport Layer Security (DTLS) based security capability indication to the CU, and then determines whether to adopt the alternative.
  • DTLS Datagram Transport Layer Security
  • Embodiment 6 is a diagrammatic representation of Embodiment 6
  • the IAB node performs adaptation processing on both the data packets it generates and the data forwarded, and the information carried in the F1AP message and the adapt subheader is taken as an example.
  • the network control signaling processing method is explained; as shown in Figure 7, Figure 7 is a schematic diagram of the alternative 4 CP protocol stack design, Figure 7(a) shows the UE’s RRC message sending process, and Figure 7(b) shows the MT RRC message sending processing, Fig. 7(c) shows the processing procedure of F1-AP of DU.
  • the adapt layer subheader of the MT part carries indication information for distinguishing control signaling.
  • the adapt layer subheader of the IAB node 2MT part needs to include an indication to inform the IAB node1 whether to deliver the uplink data packet to the F1AP layer or perform a forwarding operation.
  • the indication information includes an indication of whether the uplink data packet is MT signaling or whether it is an indication of forwarding signaling.
  • the adapt layer includes an indication of forwarding signaling, it means that the uplink data packet is that IAB node2 forwards the UE's uplink data packet to perform the forwarding operation; when the adapt layer includes an indication of MT signaling, it means that the uplink data packet is IAB node2 itself
  • the generated uplink data packets are delivered to F1AP layer.
  • IAB node1 adds the target DU information to the adapt header.
  • the IAB node1 completes F1AP message encapsulation, DTLS, SCTP, IP, and adapt encapsulation in the uplink
  • the adapt may include target DU information (such as indicating a certain donor DU, such as the donor DU in FIG. 7).
  • the target DU identification information is configured when the donor CU configures the routing table for the access IAB node; the corresponding one or more target donor DU identification information can be carried in the adapt.
  • the IAB donor DU receives the uplink data packet, determines that the target DU information in the adapt header is consistent with itself, removes the adapt header, and then sends the uplink data packet to the IAB donor CU.
  • the IAB donor CU receives the uplink data packet, it parses it, and when the F1AP message is parsed, it confirms the corresponding IAB node according to the gNB-CU UE F1AP ID and gNB-DU UE F1AP ID contained in the F1AP message DU, and deal with it accordingly.
  • the IAB donor CU in the initial F1 interface establishment phase, needs to associate the IAB node DU with the IAB node MT part, so it can be considered to carry the IAB DU status indication in the F1 setup request message and the corresponding The C-RNTI of the MT and the NR CGI corresponding to the cell the MT accesses.
  • the collocated gNB DU ID is carried in the RRC signaling sent by the IAB node 2 MT part to the IAB donor CU.
  • the IAB node DU may directly carry the IAB DU status indicator in the F1 setup request sent, as well as the corresponding C-RNTI of the MT and the NR CGI corresponding to the cell to which the MT is connected. In addition to carrying this information in the F1AP message, it can also be considered to carry the collocated gNB DUID in the RRC signaling sent by the IAB node 2 MT part to the IAB donor CU.
  • IAB donor CU generates the control signaling that is planned to be sent to the intermediate IAB node DU, generates the corresponding F1AP message, performs DTLS, Stream Control Transmission Protocol (SCTP), IP header encapsulation, and then routes through IP Sent to IAB donor DU.
  • SCTP Stream Control Transmission Protocol
  • the IAB donor CU has previously received the data packet forwarded by the IAB donor DU that corresponds to the intermediate IAB node DU as the source IP, so the IP routing table can record the corresponding reverse routing information accordingly.
  • the IAB donor DU After receiving the IP data packet, the IAB donor DU performs corresponding processing.
  • the IAB donor DU obtains the destination IAB node DU identifier according to the IP address in the IP routing, and encapsulates it in the adapt header, where the IAB donor DU has been configured with the IP address and the IAB node DU identifier. mapping relationship.
  • the routing table of the IAB donor DU includes the mapping relationship between the destination IP address and the next hop IAB node DU/MT ID, and the IAB donor DU sends the control signaling to the next hop IAB node according to the IP address information. Until it is forwarded to the IAB node DU with the same IP address as the destination IP address.
  • IAB node CP protocol stack can be configured by the operator. For example, when IAB node DU and IAB donor CU establish an F1 connection, when IAB node DU obtains the DTLS based security indication configuration from the operator, alternative 4 is used. In some embodiments, it may also be considered that the IAB node DU reports the PDCP and/or DTLS based security capability indication to the CU to determine whether to adopt the alternative 4.
  • a long-term congestion is present in an IAB network link, and the long-term congestion is relieved as an example for description.
  • the mitigation schemes that the IAB network can take include any of the following:
  • Method 1 DU sends flow control information to CU to relieve congestion.
  • the flow control information includes an indication of CU overload; it is understandable that when the CU creates a new DRB for the UE, the DU will perform admission control.
  • the DU can indicate its overload to the CU, and the CU accordingly adopts an overload reduction action (reduction action) to reduce the load; in some embodiments, the flow control signaling includes the DU requesting the release of a UE context, that is, The DU can also detect which Guaranteed Bit Rate (GBR) bearers cannot meet the demand and inform the CU. Finally, the DU can actively release the context of a certain UE.
  • GBR Guaranteed Bit Rate
  • the flow control signaling includes informing the CU that a certain DRB cannot meet the quality of service (QoS) requirements, that is, when the DU performs admission control, if the air interface resources cannot meet the requirements, the DU can directly inform the CU which DRB could not be successfully created.
  • QoS quality of service
  • Method 2 CU sends the following flow control signaling to NGC to relieve congestion.
  • the flow control signaling includes the CU requesting to release the context of a certain UE; in some embodiments, the flow control signaling includes the CU sending PDU session resource notification (session resource notification) , Notify NGC that it cannot meet the QoS requirements of a GBR QoS flow/PDU session, and may even need to be released; in some embodiments, the flow control signaling includes a CU requesting to modify an established PDU session.
  • Method 3 Adjust the network topology according to the long term congestion in the current IAB network to relieve congestion.
  • the CU switches some IAB node MTs to other parent DUs according to the measurement report and DU overload instruction; in some embodiments, when the route includes cost information, cost metric, then The design of cost metric can reflect congestion and thus potential delay; for example, a path with a smaller cost metric has less congestion; therefore, when an IAB node transmits data, choosing a path with a smaller cost metric for IAB node is equivalent to selecting congestion Fewer paths to achieve the effect of load balancing.
  • Embodiment 8 is a diagrammatic representation of Embodiment 8
  • Figure 10 is a schematic diagram of hop-by-hop flow control. It is understandable that for short term congestion, it usually occurs on the forwarding path of a certain hop. It is unlikely that the entire forwarding path will be congested, and hop-by-hop flow control is used for the intermediate IAB node within one hop. Therefore, it is more suitable for handling short-term congestion.
  • hop-by-hop flow control includes a 1:1 bearer mapping mechanism and an N:1 bearer mapping mechanism.
  • the 1:1 bearer mapping mechanism is adopted, for short-term congestion, the IAB network can take any of the following mitigation solutions:
  • Method 1 The UE bearer sends flow control information to its parent IAB through the MAC CE, and assigns a special LCID to the MAC CE.
  • the LCID indicates flow control information.
  • the MAC CE includes the LCID, desired buffer size, and/or data rate corresponding to the parent IAB link corresponding to the UE bearer.
  • the flow control information can be sent after the IAB node DU detects that the buffer of a DRB or BH RLC channel exceeds a given threshold and then sends the desired buffer size.
  • the parent IAB receives the flow control information, it is the LCID Allocating resources. It is worth noting that, depending on the value of the desired buffer size, the parent IAB allocates resources in different ways.
  • the parent IAB node DU stops scheduling the data of the logical channel; if the desired buffer size is greater than 0, the total amount of data is calculated from TX_Next_Ack-1 for the RLC AM mode; for the RLC UM mode, the total amount of data is calculated Calculate the amount of data scheduled to be sent.
  • the LCID in the flow control information is used to instruct the flow control to stop; or, the IAB node DU will either the desired buffer size or the desired data
  • the rate is set to the maximum allowable value.
  • the LCID may be used to instruct the flow control to stop.
  • Method 2 The IAB node sends an adapt layer carrying flow control related information to the parent IAB node DU.
  • the IAB node may send flow control information through the adaptation layer.
  • the IAB node adds an adapt layer control information to a corresponding bearer data packet to be forwarded to the parent IAB node DU.
  • the adapt layer control information is added only when the flow control instruction is performed. It is worth noting that in the adapt layer Need to add a bit to indicate whether there is flow control information, or directly indicate whether there is a desired data rate and/or whether there is a desired buffer size. It should be understood that after the Parent IAB node DU parses out the flow control information, it needs to be submitted to the MAC layer to assist in scheduling decisions. It is worth noting that the sending of flow control information specifically includes the following methods:
  • Method 1 The flow control information is sent after the IAB node DU detects that the buffer of a DRB or BH RLC channel exceeds a given threshold and then sends the desired buffer size. If the desired buffer size is 0, the parent IAB node stops on the RLC channel send data. Otherwise, it will be sent according to the specified buffer size.
  • Method 2 The IAB node DU detects that the buffer size of the corresponding BH RLC channel is less than a given threshold, and then sends a flow control stop instruction.
  • Method 3 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 the desired data rate to the parent node. In some embodiments, when flow control is no longer needed, a flow control termination (termination) instruction is sent.
  • the N:1 bearer mapping mechanism includes bearer mapping between terminal bearers and BH RLC bearers; and bearer mapping between BH RLC bearers.
  • bearer mapping between terminal bearers and BH RLC bearers such as As shown in Figure 11, UE1 DRB1 and UE2 DRB1 are mapped to BH RLC bearer 1, and UE1 DRB2 is mapped to BH RLC bearer 2.
  • the IAB network can take any of the following mitigation solutions:
  • Method 1 Flow control information sent by IAB node 1 MT to IAB node 2 DU, which corresponds to the desired buffer size and/or desired data rate of UE1 DRB1. It is worth noting that the flow control information is sent through adapt corresponding to BH RLC bearer1 or indicated in MAC CE to correspond to BH RLC bearer1.
  • IAB node 1 MT sends flow control information to IAB node 2 DU, when IAB node 2 DU knows the UE bearer information in each data packet in the RLC buffer of BH RLC bearer 1, when IAB node 1 MT sends
  • the flow control information corresponds to the desired buffer size and/or desired data rate of UE1 DRB1
  • the flow control information also includes UE1 and DRB identification information
  • the flow control information can be sent through the adapt corresponding to BH RLC bearer1 or in MAC CE
  • the middle indication corresponds to BH RLC bearer 1.
  • the IAB node 2 DU When the IAB node 2 DU receives the information, it judges that the amount of data that can be scheduled to be sent corresponding to the UE1 DRB1 is determined by the desired buffer size or the desired data rate.
  • Method 3 When the IAB node 1 DU can perceive the proportion (x%) of the downlink data transmitted by the UE 1 DRB1 in the BH RLC bearer 1 overall transmission data volume (x%), then the IAB node 1 MT IAB node 1 MT sent to the IAB node 2 DU Flow control information.
  • the flow control information includes the quotient of the ratio of the desired buffer size to the amount of transmitted data, or the quotient of the desired data rate and the desired data rate.
  • Method 4 If a certain UE DRB is congested, the IAB node 1 MT counts the sum of the desired buffer size/desired data rate of all UEs mapped to the BH RLC bearer, and sends the flow control information to the IAB node 2 DU.
  • the control information includes the sum of the desired buffer size or desired data rate of all UE DRBs mapped to the BH RLC bearer.
  • the mitigation scheme that the IAB network can take includes any of the following:
  • Method 1 When the flow control information sent by the IAB node 2 MT to the IAB node 3 DU, the flow control information corresponds to the desired buffer size and/or desired data rate of the BH RLC bearer 3, the flow control information can be corresponded to by the BH RLC bearer1
  • the adapt sending of, or the indication in MAC CE corresponds to BH RLC bearer 1.
  • Method 2 When the IAB node 3 DU knows the UE bearer information corresponding to each packet in the RLC buffer of the BH RLC bearer 1, the flow control information sent by the IAB node 2 MT to the IAB node 3 DU corresponds to the flow control information When the desired buffer size and/or desired data rate of the BH RLC bearer 3, the flow control information also includes one or more UE bearer identification information mapped to the BH RLC bearer 3. Then the flow control information can be sent through adapt corresponding to BH RLC bearer1, or it can be indicated in MAC CE to correspond to BH RLC bearer 1. In some embodiments, the indication may also be reported through RRC signaling.
  • the IAB node 3 DU When the IAB node 3 DU receives the information, it determines the amount of data that the corresponding UE bearer set can schedule to send, which is determined by the desired buffer size or the desired data rate.
  • Method 3 When the IAB node 2 DU can perceive the proportion of the downlink data transmitted through the BH RLC bearer 3 (x%) of the overall transmission data volume of the BH RLC bearer 1, then the IAB node 2 MT sends the flow control information to the IAB node 3 DU
  • the flow control information includes the quotient of the ratio of the desired buffer size to the amount of transmitted data, or the quotient of the desired data rate and the desired data rate.
  • IAB node 2 MT counts the sum of all the downstream BH RLC bearer's desired buffer size or desired data mapped to the corresponding upstream BH RLC bearer1 , Sent to IAB node 3 DU.
  • the IAB node DU can report the cell-specific and UE-specific frame structure configuration to the CU.
  • the CU selects and configures the appropriate cell-specific and UE-specific frame structure for the IAB node DU according to the DU report and the current IAB network resource configuration.
  • the DU sends the cell-specific slot format to the CU through the F1 setup message or the gNB-DU configuration update message.
  • the DU needs context modification (context modification required) through the UE.
  • the message sends the IAB node MT or the UE specific slot format of the UE to the CU. Therefore, the IAB donor CU can send resource coordination information to the DU to configure the resources of the DU.
  • the CU sends the D-H, D-S, U-H, U-S, F-H, F-S, not available indication corresponding to each symbol resource of the DU to the DU through F1AP.
  • the IAB donor CU may carry the DU resource configuration in the F1 interface management message (such as the F1 setup response (response), gNB-CU configuration update) sent to the IAB node DU part through the F1AP.
  • the DU resource configuration is indicated per cell (per-cell). This configuration is used for the uplink and downlink communication and resource allocation of the child link of the IAB node DU part.
  • the F1AP information belongs to non-UE specific F1 signaling.
  • This resource indicator can be used by the DU to determine the allocation of uplink and downlink resources on the child BH link and child access link; IAB node DU part needs to know the slot format corresponding to the child IAB node DU part of the access, such as which time resources are not available (not available time resource), which are soft resources, so that the IAB node DU part can display and or implicitly control whether these soft resources (time resource type can be D, U or F) are for child IAB node The child link of DU part is available.
  • the IAB donor DU and IAB node DU can determine the uplink and downlink resources that can be used for the child link according to the semi-static frame structure and resource indication sent by the CU through the F1AP, so as to configure the corresponding resources.
  • the CU can configure the semi-static frame structure for the IAB node MT part through RRC signaling, including cell-specific and UE-specific frame structure configurations; or, the CU can send the IAB node MT through RRC signaling.
  • the part sends semi-static resource configuration (type 2 for DL, type 1 and 2 for UL). This configuration is used for uplink and downlink communication and resource allocation between IAB node MT part and parent link; or, CU can configure a semi-static frame structure for normal UE through RRC signaling, including cell-specific and UE-specific frames Structural configuration and semi-static resource configuration.
  • the DU may also use resource coordination information to configure resources for the MT or normal UE it serves.
  • the resource coordination information may also include L1 signalling information.
  • IAB donor DU and IAB node DU send SFI to the IAB node MT and normal UE they serve through L1 signalling for dynamic slot format configuration and DCI/UCI scheduling for dynamic resource allocation; another example is parent IAB donor/node DU through L1 signalling to The IAB node MT it serves sends SFI or other frame structure configuration information, which is used to adjust the frame structure and resource configuration of the child link of the co-located IAB node DU.
  • the IAB node DU uses the slot format indicator (Slot Format Indicator, SFI) variable symbol (Flexible symbol) on the child link to indicate F, it can use its co-located
  • SFI Slot Format Indicator
  • the IAB node MT sends a corresponding instruction to its parent IAB node.
  • the parent IAB node can use the corresponding resources for uplink or downlink transmission.
  • the IAB donor DU and IAB node DU can determine the uplink and downlink resources that can be used for the child link according to the dynamic frame structure indication and resource indication sent by their parent node through L1 signaling, so as to configure the corresponding resources.
  • the specific slot format configuration can be uniformly coordinated by the CU.
  • the DU can send some suggestion information, and the CU performs centralized configuration on this basis.
  • the F subframe configured by the IAB node DU if a certain hop link is configured as a downlink/downlink resource, the adjacent higher and lower hop parent IAB node DU and child IAB node MT can no longer be used The resource. Therefore, whether it is D/U or F, it needs to be interleaved with INA in hop order.
  • the parent IAB node DU judges that its resources are sufficient and there are more idle slots, it can indicate that the soft resources of the corresponding IAB node DU are available on these slots.
  • intra-DU intra-DU
  • intra-CU intra-CU
  • inter-CU inter-CU
  • the IAB node measures and reports the currently connected parent IAB node.
  • the report result is forwarded to the IAB donor CU by the parent node and the intermediate node. If the IAB donor CU determines that the handover conditions are met, it can select the target parent IAB DU for the IAB node MT.
  • IAB donor CU After the handover preparation, IAB donor CU sends the handover command to IAB node MT
  • the IAB node MT After S1304, the IAB node MT receives the handover command, it can identify the slot format according to the UE-specific frame structure configuration included in the handover command, and then execute the random access process to the target parent IAB DU.
  • the IAB donor CU sends a gNB CU configuration update message to its associated IAB node DU to update the DU part frame structure configuration.
  • the frame structure format configuration corresponding to the IAB node DU includes cell-specific and UE-specific configurations.
  • the UE-specific frame format configuration can be sent by the CU to the accessing UE or child IAB node MT through RRC signaling.
  • the traditional NR specification is determined by the DU and included in the system information block (System Information Block 1, SIB1), and the DU informs the CU.
  • SIB1 System Information Block 1
  • the IAB donor CU can send the frame structure configuration of the IAB node DU through the F1 setup response message or the gNB CU configuration update message.
  • the corresponding IAB node DU can assemble or update the SIB1 system information and broadcast it.
  • the RRC reconfiguration message therein already contains the frame structure format configuration corresponding to the IAB node DU. This can reduce the delay caused by the change of IAB node DU frame structure and reduce interference.
  • the SIB1 of the IAB node DU may change.
  • the UE specific frame format of all child IAB nodes and child UEs it serves may also change, corresponding to the child DU of its child DU.
  • the frame format of (grandchild DU) may also change. For this problem, it is recommended to choose the parent IAB node with the same hop order as much as possible. In addition, if the frame format changes, it will take effect immediately after the system information is updated.
  • the IAB node may consider selecting a new parent IAB node and attempt to rebuild.
  • the IAB node can obtain the update corresponding to the IAB node MT from the new parent IAB node
  • the UE specific frame structure configuration and/or the cell-specific resource configuration of the IAB node DU may be considered.
  • the donor CU is the IAB node and MT configures disjoint UE-specific frame formats on the primary cell (Primary Cell, PCell) and the secondary cell (Secondary Cell, SCell).
  • Primary Cell Primary Cell
  • Secondary Cell Secondary Cell
  • Embodiment 11 is a diagrammatic representation of Embodiment 11:
  • This embodiment also provides an IAB.
  • an IAB As shown in FIG. 14, it includes an IAB including a processor 1401, a memory 1402, and a communication bus 1403.
  • the communication bus 1403 is used to implement connection and 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 in the information processing method in the IAB network in the foregoing embodiments.
  • This embodiment also provides a computer storage medium, which includes volatile information implemented in any method or technology for storing information (such as computer readable instructions, data structures, computer program modules, or other data). Or non-volatile, removable or non-removable media.
  • Computer storage media include but are not limited to RAM (Random Access Memory), ROM (Read-Only Memory, 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 Disc (DVD) or other optical disk storage, magnetic cassettes, tapes, magnetic disk storage or other magnetic storage A device or any other medium that can be used to store desired information and can be accessed by a computer.
  • the computer storage medium in this embodiment can be used to store one or more computer programs, and the stored one or more computer programs can be executed by a processor to implement at least one of the information processing methods in the IAB network in the above embodiments One step.
  • This embodiment also provides a computer program product, including a computer readable device, and the computer readable device stores the computer program as shown above.
  • the computer-readable device may include the computer storage medium shown above.
  • communication media usually contain computer-readable instructions, data structures, computer program modules, or other data in a modulated data signal such as carrier waves or other transmission mechanisms, and may include any information delivery medium. Therefore, this application is not limited to any specific hardware and software combination.

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Abstract

Embodiments of the present invention provides a method for processing information in an IAB network, an IAB, and a computer storage medium. The method for processing information in an IAB network comprises: a first IAB node obtains a first data packet; and the first IAB node sends the first data packet to an IAB donor.

Description

IAB网络中信息处理方法、IAB及计算机存储介质Information processing method, IAB and computer storage medium in IAB network
本申请要求在2019年02月15日提交中国专利局、申请号为201910115224.X的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。This application claims the priority of a Chinese patent application filed with the Chinese Patent Office with an application number of 201910115224.X on February 15, 2019. The entire content of this application is incorporated into this application by reference.
技术领域Technical field
本发明实施例涉及通信技术领域，例如，涉及IAB网络中信息处理方法、IAB及计算机存储介质。The embodiment of the present invention relates to the field of communication technology, for example, to an information processing method in an IAB network, an IAB and a computer storage medium.
背景技术Background technique
5G网络作为第五代移动通信网络，其峰值理论传输速度可达每秒数十Gb，这比4G网络的传输速度快数百倍。5G之所以能实现高传输速度在于毫米波的使用。毫米波是指波长在毫米数量级的电磁波，其频率大约在30GHz～300GHz之间。毫米波频段的一个特性是在空气中衰减较大，且绕射能力较弱。为此，自接入回传链路(IAB，integrated access and backhaul links)技术被提出。通过无线的回传链路和中继链路，能更灵活的部署密集的新无线电(New Radio，NR)小区网络却不需要相应地增加传输网络的密集部署。部署了integrated access and backhaul links的网络的一个示例如图1所示，其中，A，B，C都是接入节点。节点A与核心网之间存在有线连接，接入节点B和C通过节点A向核心网收发数据。用户设备可通过access link(接入链路)接入节点A，B，C。接入节点之间可通过无线的回传链路backhaul link传输数据。integrated access and backhaul links的网络中支持用户设备(User Equipment，UE)的无线接入并且将数据进行无线回传的接入节点称为IAB节点(IAB node)。而为IAB node提供无线回传功能以使得UE连接与核心网的接入节点称为IAB宿主(IAB donor)。Access link和backhaul link可使用相同或不同的载频。另外，支持集中式单元(Central Unit，CU)/分布式单元(Distribute Unit，DU)分离部署是NR中一个重要的技术特征，因此也需要在CU/DU分离部署场景中支持IAB功能。图2是CU/DU分离的IAB部署场景示意图。如图2所示，其中，IAB节点可具有DU类似功能和移动终端(Mobile Terminal，MT)类似功能，其中MT部分(part)也即UE类似功能。IAB节点通过双连接接入两个父IAB节点。As the fifth-generation mobile communication network, 5G network has a theoretical peak transmission speed of up to tens of Gb per second, which is hundreds of times faster than that of 4G network. The reason why 5G can achieve high transmission speed is the use of millimeter waves. Millimeter waves refer to electromagnetic waves with wavelengths on the order of millimeters, and their frequencies are approximately between 30 GHz and 300 GHz. One of the characteristics of the millimeter wave frequency band is that the attenuation in the air is large, and the diffraction ability is weak. For this reason, self-access backhaul links (IAB, integrated access and backhaul links) technology has been proposed. Through wireless backhaul links and relay links, dense New Radio (NR) cell networks can be deployed more flexibly, but there is no need to increase the dense deployment of transmission networks accordingly. An example of a network deployed with integrated access and backhaul links is shown in Figure 1, where A, B, and C are all access nodes. There is a wired connection between node A and the core network, and access nodes B and C send and receive data to the core network through node A. User equipment can access nodes A, B, and C through an access link. Data can be transmitted between access nodes through a wireless backhaul link. An access node in a network of integrated access and backhaul links that supports user equipment (User Equipment, UE) wireless access and performs wireless backhaul of data is called an IAB node (IAB node). The access node that provides the wireless backhaul function for the IAB node so that the UE connects to the core network is called an IAB donor (IAB donor). Access link and backhaul link can use the same or different carrier frequencies. In addition, support for centralized unit (CU)/distributed unit (DU) separate deployment is an important technical feature in NR, so it is also necessary to support the IAB function in the CU/DU separate deployment scenario. Figure 2 is a schematic diagram of an IAB deployment scenario with CU/DU separation. As shown in Figure 2, the IAB node can have a DU-like function and a mobile terminal (Mobile Terminal, MT)-like function, and the MT part is also a UE-like function. The IAB node accesses two parent IAB nodes through dual connections.
发明内容Summary of the invention
本发明实施例提供的IAB网络中信息处理方法、IAB计算机存储介质，解决了在IAB场景下如何实现信息传输的问题。The information processing method in the IAB network and the IAB computer storage medium provided by the embodiments of the present invention solve the problem of how to realize information transmission in the IAB scenario.
本发明实施例提供一种IAB网络中信息处理方法，包括：The embodiment of the present invention provides an information processing method in an IAB network, including:
自接入及回传第一IAB节点获取第一数据包；Obtain the first data packet from the first IAB node for access and return;
所述第一IAB节点发送所述第一数据包至IAB宿主donor。The first IAB node sends the first data packet to the IAB host donor.
本发明实施例还提供一种IAB网络中信息处理方法，包括：IAB节点发送流控信息至父节点。所述IAB节点以连接身份所接入的IAB节点称为父IAB节点The embodiment of the present invention also provides an information processing method in an IAB network, which includes: an IAB node sends flow control information to a parent node. The IAB node accessed by the IAB node as the connection identity is called the parent IAB node
本发明实施例还提供一种IAB网络中信息处理方法，包括以下之一：The embodiment of the present invention also provides an information processing method in an IAB network, including one of the following:
IAB宿主donor CU发送下行信息至IAB宿主donor DU；The IAB host donor CU sends downlink information to the IAB host donor DU;
IAB宿主donor CU发送下行信息至IAB节点；The IAB host donor CU sends downlink information to the IAB node;
父IAB节点转发下行信息至IAB节点；The parent IAB node forwards downlink information to the IAB node;
所述下行信息消息包括无线资源控制(Radio Resource Control，RRC)消息，或F1应用协议(F1Application Protocol，F1AP)消息。The downlink information message includes a radio resource control (Radio Resource Control, RRC) message, or an F1 Application Protocol (F1 Application Protocol, F1AP) message.
本发明实施例还提供一种IAB网络中信息处理方法，包括自接入回传链路IAB节点向所述IAB节点的下一跳IAB节点发送信息。The embodiment of the present invention also provides an information processing method in an IAB network, which includes the self-access backhaul link IAB node sending information to the next hop IAB node of the IAB node.
本发明实施例还提供一种IAB，其特征在于，所述IAB包括处理器、存储器及通信总线，其中：An embodiment of the present invention also provides an IAB, which is characterized in that the IAB includes a processor, a memory, and a communication bus, wherein:
通信总线用于实现处理器和存储器之间的连接通信；The communication bus is used to realize the connection and communication between the processor and the memory;
处理器用于执行存储器中存储的一个或者多个计算机程序，以实现如上所述IAB网络中信息处理方法中的至少一个步骤。The processor is configured to execute one or more computer programs stored in the memory to implement at least one step in the information processing method in the IAB network as described above.
本发明实施例还提供一种计算机存储介质，所述计算机存储介质存储有一个或者多个程序，所述一个或者多个程序可被一个或者多个处理器执行，以实现如上所述IAB网络中信息处理方法中的至少一个步骤。An embodiment of the present invention also provides a computer storage medium, the computer storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the above-mentioned IAB network At least one step in an information processing method.
根据本发明实施例提供的IAB网络中信息处理方法、IAB以及计算机存储介质，通过第一IAB节点获取第一数据包；第一IAB节点发送所述第一数据包至IAB宿主donor，即第一IAB节点实现了数据包的转发；通过IAB节点发送流控信息至父节点，即流控信息的发送，进而缓解IAB网络中的拥塞；IAB宿主donor CU发送下行信息至IAB宿主donor DU；IAB宿主donor CU发送下行信息至IAB节点；父IAB节点转发下行信息至IAB节点；所述下行信息消息包括RRC消息，或F1AP消息；实现通过下行信息的发送，实现IAB网络中的资源协调。According to the information processing method, IAB, and computer storage medium in the IAB network provided by the embodiments of the present invention, the first data packet is acquired through the first IAB node; the first IAB node sends the first data packet to the IAB host donor, that is, the first The IAB node realizes the forwarding of data packets; the flow control information is sent to the parent node through the IAB node, that is, the flow control information is sent, thereby alleviating the congestion in the IAB network; the IAB host donor CU sends the downlink information to the IAB host donor DU; the IAB host The donor CU sends downlink information to the IAB node; the parent IAB node forwards the downlink information to the IAB node; the downlink information message includes an RRC message or an F1AP message; realizes resource coordination in the IAB network by sending downlink information.
附图说明Description of the drawings
图1为integrated access and backhaul links的网络示意图；Figure 1 is a schematic diagram of a network of integrated access and backhaul links;
图2为CU/DU分离的IAB部署场景示意图；Figure 2 is a schematic diagram of an IAB deployment scenario with CU/DU separation;
图3为本发明实施例一的IAB网络中信息处理方法的流程示意图；3 is a schematic flowchart of an information processing method in an IAB network according to the first embodiment of the present invention;
图4为本发明实施例五的可选2(alternative 2)的控制面(Control Plane，CP)协议栈设计的示意图；FIG. 4 is a schematic diagram of a control plane (CP) protocol stack design of an alternative 2 (alternative 2) of the fifth embodiment of the present invention;
图5为本发明实施例五的上行控制信令转发处理示意图；FIG. 5 is a schematic diagram of uplink control signaling forwarding processing according to Embodiment 5 of the present invention;
图6为本发明实施例五的下行控制信令转发处理；FIG. 6 is the forwarding processing of downlink control signaling according to Embodiment 5 of the present invention;
图7为本发明实施例六的alternative 4的CP协议栈设计的示意图；FIG. 7 is a schematic diagram of the design of the CP protocol stack of alternative 4 in the sixth embodiment of the present invention;
图8为本发明实施例六的上行控制信令转发处理示意图；FIG. 8 is a schematic diagram of uplink control signaling forwarding processing according to Embodiment 6 of the present invention;
图9为本发明实施例六的下行控制信令转发处理；FIG. 9 is the forwarding processing of downlink control signaling according to Embodiment 6 of the present invention;
图10为本发明实施例八的逐跳流控制(hop-by-hop flow control)的示意图；10 is a schematic diagram of hop-by-hop flow control according to Embodiment 8 of the present invention;
图11为本发明实施例八的终端承载和回程无线链路控制(Backhaul Radio Link Control，BH RLC)承载之间的承载映射示意图；11 is a schematic diagram of bearer mapping between terminal bearers and Backhaul Radio Link Control (BH RLC) bearers according to Embodiment 8 of the present invention;
图12为本发明实施例八的BH RLC承载之间的承载映射示意图；12 is a schematic diagram of bearer mapping between BH RLC bearers according to Embodiment 8 of the present invention;
图13为本发明实施例十的IAB切换场景示意图；FIG. 13 is a schematic diagram of an IAB handover scenario according to Embodiment 10 of the present invention;
图14为本发明实施例十一的IAB结构示意图。FIG. 14 is a schematic diagram of the structure of an IAB according to Embodiment 11 of the present invention.
具体实施方式detailed description
下面通过具体实施方式结合附图对本发明实施例作进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。Hereinafter, the embodiments of the present invention will be further described in detail through specific implementations in conjunction with the drawings. It should be understood that the specific embodiments described here are only used to explain the application, and are not used to limit the application.
实施例一：Example one:
为了解决IAB场景数据包的发送，本实施例提供一种IAB网络中信息处理方法，如图3所示，该IAB网络中信息处理方法包括：In order to solve the sending of IAB scenario data packets, this embodiment provides an information processing method in an IAB network. As shown in FIG. 3, the information processing method in the IAB network includes:
S301、自接入及回传第一IAB节点获取第一数据包。S301. Obtain the first data packet from the first IAB node for access and return.
在本发明实施例中，第一IAB节点获取第一数据包，该第一数据包可以是第一IAB节点接收UE发送的RRC消息，或第一IAB节点自身MT生成的RRC消息，或第一IAB节点自身DU生成的F1AP消息。In the embodiment of the present invention, the first IAB node obtains the first data packet. The first data packet may be the RRC message sent by the UE received by the first IAB node, or the RRC message generated by the MT of the first IAB node itself, or the first data packet. F1AP message generated by the IAB node's own DU.
值得注意的是，第一IAB节点获取第一数据包之后，还可以为第一数据包添加适配层包头，该适配层包头包括以下信息中的至少一种：目标节点信息；IAB节点标识信息；IAB节点产生和/或转发的控制信令/数据携带标志信息；第一数 据包所属控制面承载标识。例如为第一数据包添加包括目标节点为IAB donor的适配层包头；又例如为第一数据包添加包括IAB节点转发的信令携带标志信息的适配层包头。It is worth noting that after the first IAB node obtains the first data packet, it can also add an adaptation layer header to the first data packet, the adaptation layer header includes at least one of the following information: target node information; IAB node identifier Information; the control signaling/data carried by the IAB node generated and/or forwarded carries flag information; the control plane to which the first data packet belongs bears the identity. For example, adding an adaptation layer header including the IAB donor for the first data packet; for example, adding an adaptation layer header including flag information for signaling forwarded by the IAB node to the first data packet.
S302、所述第一IAB节点发送所述第一数据包至IAB宿主donor。S302. The first IAB node sends the first data packet to an IAB host donor.
可以理解的是，该第一IAB节点可以直接与IAB donor连接，也可以通过其他中间IAB节点连接到IAB donor。因此第一IAB节点可以直接发送所述第一数据包至IAB宿主donor；第一IAB节点发送的所述第一数据包经过一个或多个中间节点转发至IAB宿主donor，例如IAB节点1获取第一数据包后，通过IAB节点2、IAB节点3转发到IAB宿主donor。It is understandable that the first IAB node may be directly connected to the IAB donor, or may be connected to the IAB donor through other intermediate IAB nodes. Therefore, the first IAB node can directly send the first data packet to the IAB host donor; the first data packet sent by the first IAB node is forwarded to the IAB host donor through one or more intermediate nodes, for example, the IAB node 1 obtains the first data packet. After a data packet, it is forwarded to the IAB host donor through IAB node 2 and IAB node 3.
在本发明实施例中，IAB宿主donor接收到IAB节点发送的第一数据包后，IAB宿主donor还可以将该第一数据包封装到F1AP消息，该F1AP消息包括：所封装的分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)协议数据单元(Protocol Data Unit，PDU)对应的IAB节点标识以及承载标识信息。In the 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 also encapsulate the first data packet into an F1AP message, and the F1AP message includes: the encapsulated packet data convergence protocol (Packet Data Convergence Protocol, PDCP) Protocol Data Unit (Protocol Data Unit, PDU) corresponding to the IAB node identification and bearer identification information.
实施例二：Embodiment two:
IAB节点上的入口数据速率大于出口数据速率时，会导致的缓冲区溢出，进而使得IAB网络中出现拥塞，为了解决该流控的问题，本实施例提供一种IAB网络中信息处理方法，该IAB网络中信息处理方法包括When the ingress data rate on the IAB node is greater than the egress data rate, it will cause buffer overflow, which will cause congestion in the IAB network. In order to solve the flow control problem, this embodiment provides an information processing method in the IAB network. Information processing methods in the IAB network include
第一IAB节点发送流控信息至父节点。The first IAB node sends flow control information to the parent node.
在本发明实施例中，所述IAB节点以连接身份所接入的IAB节点称为父IAB节点。流控信息包括以下信息中的至少一种：一个或多个承载标识；一个或多个逻辑信道标识；用户设备UE标识或IAB节点的节点标识信息；需要的缓存大小desired buffer size信息；需要的数据速率desired data rate信息；流控指示。可以理解的是，该第一IAB节点发送流控信息可以是对应于IAB节点的流控信息，也可以是对应用户设备UE的流控信息。In the embodiment of the present invention, the IAB node accessed by the IAB node as the connection identity is called the parent IAB node. The flow control information includes at least one of the following information: one or more bearer identifiers; one or more logical channel identifiers; user equipment UE identifiers or node identification information of IAB nodes; required buffer size information; required Data rate desired data rate information; flow control indication. It is understandable that the flow control information sent by the first IAB node may be flow control information corresponding to the IAB node, or flow control information corresponding to the user equipment UE.
其中需要的缓存大小desired buffer size信息，包括以下至少之一：UE的承载或逻辑信道对应的需要的缓存大小desired buffer size；所述IAB节点的承载或逻辑信道对应的需要的缓存大小；需要的数据速率desired data rate信息，包括以下至少之一：UE的承载或逻辑信道对应的需要的数据速率desired data rate；所述IAB节点的承载或逻辑信道对应的数据速率desired data rate。The required buffer size information includes at least one of the following: the required buffer size corresponding to the UE bearer or logical channel; the required buffer size corresponding to the bearer of the IAB node or the logical channel; required The data rate desired data rate information includes at least one of the following: a desired data rate corresponding to a UE's bearer or logical channel; a desired data rate corresponding to the bearer or logical channel of the IAB node.
实施例三：Example three:
为了实现IAB的资源协调，本实施例提供一种IAB网络中信息处理方法，该IAB网络中信息处理方法包括：IAB宿主donor CU发送下行信息至IAB宿主donor DU；或，IAB宿主donor CU发送下行信息至IAB节点；或，父IAB节点转发下行信息至IAB节点。In order to achieve IAB resource coordination, this embodiment provides an information processing method in an IAB network. The information processing method in the IAB network includes: IAB host donor CU sends downlink information to IAB host donor DU; or, IAB host donor CU sends downlink Information to the IAB node; or, the parent IAB node forwards the downlink information to the IAB node.
其中下行信息消息是RRC消息，或F1AP消息。The downlink information message is an RRC message or an F1AP message.
在本发明实施例中，IAB宿主donor DU与IAB节点可以直接连接，也可以是通过其他中间IAB节点连接到IAB节点，因此当IAB宿主donor CU发送下行信息至IAB节点时，可以是IAB宿主donor CU发送下行信息至IAB宿主donor DU，通过所述IAB宿主donor DU转发所述下行信息至所述IAB节点；也可以是IAB宿主donor CU发送下行信息至IAB宿主donor DU，所述IAB宿主donor DU经过一跳或多跳转发所述下行信息至下一跳节点，通过所述下一跳节点转发下行信息至所述IAB节点。In the embodiment of the present invention, the IAB host donor DU can be directly connected to the IAB node, or it can be connected to the IAB node through other intermediate IAB nodes, so when the IAB host donor CU sends downlink information to the IAB node, it can be the IAB host donor The CU sends downlink information to the IAB host donor DU, and forwards the downlink information to the IAB node through the IAB host donor DU; or the IAB host donor CU sends the downlink information to the IAB host donor DU, and the IAB host donor DU The downlink information is sent to the next hop node after one or more hops, and the downlink information is forwarded to the IAB node through the next hop node.
值得注意的是，当下行信息包括F1AP消息时，IAB宿主donor CU产生F1AP消息后，发送F1AP消息至IAB节点；该F1AP消息至少包括以下信息之一：目标节点信息；F1AP消息所属控制面承载标识信息；IAB宿主donor DU配置信息；IAB节点DU配置信息。It is worth noting that when the downlink information includes the F1AP message, the IAB host donor CU sends the F1AP message to the IAB node after generating the F1AP message; the F1AP message includes at least one of the following information: target node information; control plane bearer identification to which the F1AP message belongs Information; IAB host donor DU configuration information; IAB node DU configuration information.
其中IAB donor DU配置信息包括：IAB宿主donor DU接收互联网协议(Internet Protocol，IP)地址与IAB node DU标识的映射(mapping)关系，才能进行对应adapt layer的封装，因此IAB宿主donor DU可以根据IP地址得到IAB node DU标识，进而将下行信息发送至IAB节点；或，所述IAB宿主donor DU的路由表包含目的IP地址与下一跳IAB节点标识的mapping关系，进而可以将下行信息发送至对应的IAB节点。The configuration information of the IAB donor DU includes: the IAB host donor DU receives the mapping relationship between the Internet Protocol (IP) address and the IAB node DU identifier, so that the corresponding adapt layer can be encapsulated, so the IAB host donor DU can be based on IP The address is identified by the IAB node DU, and then the downlink information is sent to the IAB node; or, the routing table of the IAB host donor DU contains the mapping relationship between the destination IP address and the next hop IAB node identifier, and the downlink information can be sent to the corresponding The IAB node.
在本发明实施例中，IAB节点DU配置信息包括：对应于IAB节点DU的各个符号资源对应的D-H，D-S，U-H，U-S，F-H，F-S，不可用(not available)指示，该IAB节点DU配置信息可以用于DU确定子(child)BH link以及child access link上的上行及下行资源分配。In the embodiment of the present invention, the IAB node DU configuration information includes: DH, DS, UH, US, FH, FH, and FS corresponding to each symbol resource of the IAB node DU, not available indication, the IAB node DU configuration The information can be used for DU to determine the uplink and downlink resource allocation on the child BH link and child access link.
在一些实施例中，当父IAB节点转发下行信息至IAB节点之后，该父IAB节点DU为所述下行信息添加适配层包头，所述适配层包头中包括：MT终止信息。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 header to the downlink information, and the adaptation layer header includes: MT termination information.
值得注意的是，当下行信息包括RRC消息时，该IAB宿主donor CU产生RRC消息，将该RRC消息后发送给IAB节点，该RRC消息至少包括以下信息之一：所述IAB节点的半静态帧结构，例如包括小区-专用(cell-specific)以及UE-specific的帧结构配置；所述IAB节点的半静态资源配置，例如对于下行链 路的类型2(type 2 for Down Link，type 2 for DL)，type 1 and 2 for上行链路(Up Link，UL)；终端UE的半静态帧结构，例如包括cell-specific以及UE-specific的帧结构配置以及进行半静态资源配置；进而IAB宿主donor CU通过该RRC消息对IAB节点资源进行协调。It is worth noting that when the downlink information includes an RRC message, the IAB donor CU generates an RRC message, and sends the RRC message to the IAB node. The RRC message includes at least one of the following information: the semi-static frame of the IAB node The structure, for example, includes cell-specific (cell-specific) and UE-specific frame structure configurations; the semi-static resource configuration of the IAB node, for example, type 2 for Down Link (type 2 for DL) ), type 1 and 2 for uplink (Up Link, UL); the semi-static frame structure of the terminal UE, such as cell-specific and UE-specific frame structure configuration and semi-static resource configuration; and then the IAB donor CU The IAB node resources are coordinated through the RRC message.
实施例四：Embodiment four:
本发明实施例提供的一种IAB网络中信息处理方法，该IAB网络中信息处理方法包括：An embodiment of the present invention provides an information processing method in an IAB network, and the information processing method in an IAB network includes:
IAB节点向所述IAB节点的下一跳IAB节点发送信息。The IAB node sends information to the next hop IAB node of the IAB node.
在本发明实施例中，IAB节点包括终端UE、IAB node DU、IAB node MT、IAB子节点、IAB节点、IAB父节点、IAB宿主donor中的任意一种，例如上行信息发送时，当IAB节点包括IAB时，其下一跳节点为IAB宿主donor；又例如下行信息发送时，当IAB节点包括IAB父节点时，其下一跳节点为IAB节点，例如IAB节点发送信息给IAB宿主donor；又例如IAB宿主donor发送信息给IAB节点。In the embodiment of the present invention, the IAB node includes any one of UE, IAB node DU, IAB node MT, IAB child node, IAB node, IAB parent node, and IAB host donor. For example, when uplink information is sent, when the IAB node When the IAB is included, the next hop node is the IAB host donor; for example, when downlink information is sent, when the IAB node includes the IAB parent node, the next hop node is the IAB node, for example, the IAB node sends information to the IAB host donor; and For example, the IAB host donor sends information to the IAB node.
在本发明实施例中，根据信息的不同，其IAB节点向所述IAB节点的下一跳IAB节点发送信息也不同。当信息包括IAB产生和/或转发的上行消息(例如上行控制信息或上行数据)携带标志信息，该IAB产生和/或转发的上行消息携带标志信息包括：IAB节点的自适应子头中携带是否是MT信令的指示信息，和/或，是否是转发信令的指示信息；可以理解的是，当包括MT信令的指示信息时，表示上行控制信令/上行数据是IAB产生的；当包括转发信令的指示信息时，表示上行控制信令/上行数据是IAB转发其他IAB的。该IAB产生和/或转发的上行消息携带标志信息还可以包括：下一跳IAB节点的自适应子头中携带封装的控制信令对应的所述IAB节点及信令无线承载(Sigaling Radio Bearer，SRB)的标识信息。例如IAB1向IAB2发送第一信息，该第一信息包括是否是MT信令的指示信息，和/或，是否是转发信令的指示信息；IAB2向IAB3发送第二信息，该第二信息包括封装的控制信令对应的所述IAB节点及SRB的标识信息。在一些实施例中的IAB节点及SRB的标识信息包括以下至少之一：gNB-CU UE F1AP标识(Identifier，ID)，gNB-DU UE F1AP ID，MT的)小区无线网络临时标识(Cell-Radio Network Temporary Identifier，C-RNTI)和NR小区全球标识(NR Cell Global Identifier，NCGI)，SRB ID信息。In the embodiment of the present invention, according to different information, the information sent by the IAB node to the next hop IAB node of the IAB node is also different. When the information includes the uplink message generated and/or forwarded by the IAB (such as uplink control information or uplink data) carrying flag information, the uplink message generated and/or forwarded by the IAB carries flag information including: whether the adaptive subheader of the IAB node carries It is the indication information of MT signaling, and/or whether it is the indication information of forwarding signaling; it is understandable that when the indication information of MT signaling is included, it means that the uplink control signaling/uplink data is generated by IAB; When the instruction information for forwarding signaling is included, it indicates that the uplink control signaling/uplink data is forwarded by the IAB to other IABs. The uplink message generated and/or forwarded by the IAB may also include flag information: the adaptive subheader of the next-hop IAB node carries the encapsulated control signaling corresponding to the IAB node and signaling radio bearer (Sigaling Radio Bearer, SRB) identification information. For example, IAB1 sends first information to IAB2, and the first information includes information indicating whether it is MT signaling, and/or whether it is forwarding signaling; IAB2 sends second information to IAB3, and the second information includes encapsulation The identification information of the IAB node and SRB corresponding to the control signaling. In some embodiments, the identification information of the IAB node and the SRB includes at least one of the following: gNB-CU UE F1AP identification (Identifier, ID), gNB-DU UE F1AP ID, MT) cell radio network temporary identity (Cell-Radio) Network Temporary Identifier (C-RNTI) and NR Cell Global Identifier (NCGI), SRB ID information.
在一些实施例中，所述IAB节点包括IAB donor，信息包括IAB产生和/或转发的下行消息携带标志信息；IAB产生和/或转发的下行消息携带标志信息包 括IAB donor CU在F1AP消息中携带其内嵌的F1AP消息对应的SRB标识以及IAB节点标识；所述IAB节点标识包括IAB node DU标识，或并置(collocated)IAB node MT标识；可以理解的是，F1AP层指donor DU和donor CU之间F1-C接口的F1AP，进而IAB donor DU收到IAB donor CU发送的F1AP消息，IAB donor DU收到所述F1AP消息后，解析出内部包含的IAB节点标识以及所述SRB标识；在自适应子头中封装所述IAB节点标识及所述SRB标识，将所述F1AP消息转发给下一跳IAB节点。即IAB donor DU收到F1AP消息后，根据SRB标识以及IAB节点标识实现路由转发功能，转发到下一跳IAB节点。In some embodiments, the IAB node includes an IAB donor, and the information includes the downlink message generated and/or forwarded by the IAB carries flag information; the downlink message generated and/or forwarded by the IAB carries flag information including the IAB donor CU carried in the F1AP message The SRB identifier and IAB node identifier corresponding to the embedded F1AP message; the IAB node identifier includes the IAB node DU identifier, or the collocated IAB node MT identifier; it is understandable that the F1AP layer refers to donor DU and donor CU The F1AP between the F1-C interface, and then the IAB donor DU receives the F1AP message sent by the IAB donor CU. After the IAB donor DU receives the F1AP message, it parses out the IAB node identifier and the SRB identifier contained inside; The adaptation subheader encapsulates the IAB node identifier and the SRB identifier, and forwards the F1AP message to the next hop IAB node. That is, after the IAB donor DU receives the F1AP message, it implements the routing and forwarding function according to the SRB identifier and the IAB node identifier, and forwards it to the next hop IAB node.
值得注意的是，在自适应子头中封装所述IAB节点标识及所述SRB标识，将所述F1AP消息转发给下一跳IAB节点之后，下一跳AB节点收到IAB donor DU发送的数据包后，确定IAB节点标识与自身不一致时，下一跳IAB节点将解析出来的F1AP消息中包含的RRC消息投递给适配层；在一些实施例中，将下一跳IAB节点将解析出来的F1AP消息中包含的RRC消息投递给适配层之后，下一跳IAB节点在适配层子头中添加MT终止指示。在一些实施例中，当目标IAB node标识信息与自己一致，则将该IAB产生和/或转发的上行数据包投递到adapt指示的SRB进行PDCP解密，之后投递给对应IAB node2 DU的F1AP实体对F1AP消息内容进行解析。It is worth noting that after encapsulating the IAB node identifier and the SRB identifier in the adaptive subheader, and forwarding the F1AP message to the next hop IAB node, the next hop AB node receives the data sent by IAB donor DU After the packet, when it is determined that the IAB node identifier is inconsistent with itself, the next hop IAB node will deliver the RRC message contained in the parsed F1AP message to the adaptation layer; in some embodiments, the next hop IAB node will parse it out After the RRC message contained in the F1AP message is delivered to the adaptation layer, the next-hop IAB node adds an MT termination indication in the adaptation layer subheader. In some embodiments, when the identification information of the target IAB node is consistent with itself, the uplink data packet generated and/or forwarded by the IAB is delivered to the SRB indicated by adapt for PDCP decryption, and then delivered to the F1AP entity pair corresponding to the IAB node2 DU The F1AP message content is analyzed.
在本发明实施例中，该信息还可以是流控信息，用于缓解IAB网络中的拥塞；其中该流控信息包括：终端UE承载或所述IAB节点对应的LCID、desired buffer size和/或data rate；此时IAB节点向所述IAB节点的下一跳IAB节点发送信息之后，下一跳IAB节点接收所述流控信息，确定剩余缓冲区大小desired buffer size值为0，停止调度该逻辑信道的数据；和/或确定剩余缓冲区大小desired buffer size大于0，对于RLC确认模式(Acknowledged Mode，AM)从TX_Next_Ack-1计算数据总量；对于RLC非确认模式(Unacknowledged Mode，UM)，按照待调度发送的数据量计算。In the embodiment of the present invention, the information may also be flow control information, which is used to relieve congestion in the IAB network; where the flow control information includes: the terminal UE bearer or the LCID corresponding to the IAB node, the desired buffer size, and/or data rate; at this time, after the IAB node sends information to the next hop IAB node of the IAB node, the next hop IAB node receives the flow control information, determines the remaining buffer size, the desired buffer size value is 0, and stops scheduling the logic Channel data; and/or determine that the remaining buffer size desired buffer size is greater than 0, for RLC acknowledged mode (Acknowledged Mode, AM), calculate the total amount of data from TX_Next_Ack-1; for RLC unacknowledged mode (UM), follow Calculation of the amount of data to be dispatched.
在一些实施例中，流控信息包括自适应层携带是否有流控信息存在，或直接指示是否有desire data rate和/或是否有desired buffer size存在。此时，值得注意的是，IAB节点向所述IAB节点的下一跳IAB节点发送信息包括在IAB节点检测到某个UE承载或BH RLC信道(channel)的buffer超出给定门限后，向下一跳IAB节点发送需要的缓存大小desired data rate；或，IAB节点检测到对应的BH RLC channel的buffer size小于给定门限，向下一跳IAB节点发送流控停止指示；或，IAB节点检测到对应的BH RLC channel的buffer size小于给定门限，将desired buffer size或desired data rate设置为最大允许值。In some embodiments, the flow control information includes whether there is flow control information carried by the adaptive layer, or directly indicates whether there is a desired data rate and/or whether there is a desired buffer size. At this time, it is worth noting that the IAB node sending information to the next hop IAB node of the IAB node includes that the IAB node detects that the buffer of a certain UE bearer or BH RLC channel (channel) exceeds a given threshold. One-hop IAB node sends the required buffer size desired data rate; or, the IAB node detects that the buffer size of the corresponding BH RLC channel is less than a given threshold, and sends a flow control stop instruction to the next-hop IAB node; or, the IAB node detects If the buffer size of the corresponding BH RLC channel is less than the given threshold, set the desired buffer size or desired data rate to the maximum allowable value.
在一些实施例中，流控信息包括终端承载或BH RLC承载的desired buffer  size和/或desired data rate；在一些实施例中，流控信息除了包括流控信息包括终端承载或BH RLC承载的desired buffer size和/或desired data rate外，还可以包括终端标识信息，例如UE和数据无线承载(Data Radio Bearer，DRB)标识信息。In some embodiments, the flow control information includes the desired buffer size and/or desired data rate carried by the terminal or BH RLC; in some embodiments, the flow control information includes the desired buffer size and/or desired data rate carried by the terminal or BH RLC. In addition to the buffer size and/or desired data rate, it may also include terminal identification information, such as UE and data radio bearer (Data Radio Bearer, DRB) identification information.
在一些实施例中，IAB节点获知终端承载BH RLC承载传输的下行数据在与所述终端映射的BH RLC bearer整体传输数据量的比例时，流控信息包括desired buffer size与传输数据量的比例的商，或desired data rate与desired data rate的商。在一些实施例中流控信息包括所有映射到BH RLC bearer的终端承载的desired buffer size或desired data rate之和。In some embodiments, when the IAB node learns the ratio of the downlink data transmitted by the terminal carrying the BH RLC bearer to the overall transmission data volume of the BH RLC bearer mapped to the terminal, the flow control information includes the ratio of the desired buffer size to the transmission data volume. Quotient, or the quotient of desired data rate and desired data rate. In some embodiments, the flow control information includes the sum of the desired buffer size or desired data rate of all terminals that are mapped to the BH RLC bearer.
实施例五：Embodiment five:
本发明实施例中，以基于alternative 2的CP协议栈设计，IAB node对自身产生的数据包和转发的数据都进行适应(adaptation)处理情况下，在F1AP消息和适应(adapt)子头中携带信息为例进行说明，对IAB网络控制信令处理方法进行说明；如图4所示，图4为alternative 2的CP协议栈设计的示意图，图4(a)表示UE的RRC消息发送处理过程，图4(b)表示MT的RRC消息发送处理处理，图4(c)表示DU的F1-AP的处理过程。可以理解的是，若IAB node 1 MT part产生的RRC消息执行自适应adapt layer处理，则MT的RRC信令与IAB node 1转发的信令可复用相同的SRB进行传输，基于上述alternative 2，当IAB node对自身产生的数据包执行adapt层(layer)处理时，上行控制信令转发处理如图5所示：In the embodiment of the present invention, based on the alternative 2 CP protocol stack design, the IAB node adapts the data packets it generates and the data forwarded, and carries it in the F1AP message and the adapt subheader. The information is taken as an example to describe the IAB network control signaling processing method; as shown in Figure 4, Figure 4 is a schematic diagram of the alternative CP protocol stack design, Figure 4(a) shows the UE’s RRC message sending process. Figure 4(b) shows the RRC message transmission processing of the MT, and Figure 4(c) shows the processing of the F1-AP of the DU. It is understandable that if the RRC message generated by the IAB node 1 MT part performs adaptive adapt layer processing, the RRC signaling of the MT and the signaling forwarded by the IAB node 1 can be multiplexed with the same SRB for transmission. Based on the above alternative 2, When the IAB node performs adapt layer processing on the data packets it generates, the upstream control signaling forwarding processing is shown in Figure 5:
S501、IAB node 2 MT part的adapt layer子头中携带用于区分控制信令的指示信息。S501, IAB node 2 The adapt layer subheader of the MT part carries indication information for distinguishing control signaling.
在本发明实施例中，IAB node 1能够处理IAB node 2从图4(a)和图4(b)发来的控制信令，为了让IAB node 1区分出两种不同的类型的信令，通过在adapt layer携带用于区分控制信令的指示信息，对于每个上行数据包，在adapt layer子头中携带上行数据包是否是MT信令的指示信息，或是否是转发信令的指示，让IAB node 1进行区分处理。例如对于IAB node 1接收到IAB node 2的上行数据包1，其IAB node 2 MT part的adapt layer子头中包含该上行数据包1是MT信令的指示，则表示该上行数据包1是IAB node 2自身产生的数据；同理，当adapt layer子头中包含该上行数据包1是转发信令的指示，表示该上行数据包1是IAB node 2转发的UE的数据包。In the embodiment of the present invention, IAB node 1 can process the control signaling sent by IAB node 2 from Figure 4(a) and Figure 4(b). In order to allow IAB node 1 to distinguish two different types of signaling, By carrying indication information for distinguishing control signaling in the adapt layer, for each uplink data packet, the adapt layer subheader carries the indication information of whether the uplink data packet is MT signaling or whether it is an indication of forwarding signaling, Let IAB node1 perform differentiated processing. For example, if IAB node 1 receives uplink data packet 1 of IAB node 2, and the adapt layer subheader of IAB node 2 MT part contains an indication that the uplink data packet 1 is MT signaling, it means that the uplink data packet 1 is IAB The data generated by node 2 itself; in the same way, when the adapt layer sub-header contains the indication that the uplink data packet 1 is forwarding signaling, it means that the uplink data packet 1 is a data packet of the UE forwarded by IAB node 2.
S502、IAB donor CU的F1AP消息携带内部(inner)PDCP PDU对应的IAB  node MT及SRB的标识信息。S502. The F1AP message of the IAB donor CU carries identification information of the IAB node MT and SRB corresponding to the inner PDCP PDU.
在本发明实施例中，对于IAB donor CU-CP，为了将F1AP消息中内层的PDCP PDU投递给正确的PDCP实体，其中该F1AP层指donor DU和donor CU之间F1-C接口的F1AP，F1AP消息携带inner PDCP PDU对应的IAB node MT及SRB的标识信息。应当理解的是，donor DU可以通过adapt layer获取该IAB node及SRB的标识信息，即donor DU获取该IAB node及SRB的标识信息，并将其携带在F1AP消息中，发给IAB donor CU-CP。In the embodiment of the present invention, for the IAB donor CU-CP, in order to deliver the inner PDCP PDU in the F1AP message to the correct PDCP entity, the F1AP layer refers to the F1AP of the F1-C interface between the donor DU and the donor CU, The F1AP message carries the identification information of the IAB node MT and SRB corresponding to the inner PDCP PDU. It should be understood that the donor DU can obtain the identification information of the IAB node and SRB through adapt layer, that is, the donor DU obtains the identification information of the IAB node and SRB, and carries it in the F1AP message and sends it to the IAB donor CU-CP .
值得注意的是，IAB node及SRB的标识信息包含以下任意之一：It is worth noting that the identification information of IAB node and SRB includes any one of the following:
在IAB node 2 adapt layer中携带的MT 2的gNB-CU UE F1AP ID2，gNB-DU UE F1AP ID2，以及inner PDCP PDU对应的SRB ID信息；The gNB-CU UE F1AP ID2, gNB-DU UE F1AP ID2, and the SRB ID information corresponding to the inner PDCP PDU of the MT 2 carried in the IAB node 2 adapt layer;
在IAB node 2 adapt layer中携带的创建F1AP消息的IAB node DU collocated的IAB node MT的C-RNTI+NCGI，以及inner PDCP PDU对应的SRB ID信息。The C-RNTI+NCGI of the IAB node DU collocated IAB node MT that creates the F1AP message and the SRB ID information corresponding to the inner PDCP PDU carried in the IAB node 2 adapt layer.
S503、IAB donor CU将上行数据包投递到对应的F1AP实体。S503. The IAB donor CU delivers the uplink data packet to the corresponding F1AP entity.
在本发明实施例中，上行数据包经过步骤502会投递到对应的F1AP实体，即根据F1AP消息中携带的信息将上行数据包投递到F1AP实体。在初始F1接口建立阶段，IAB donor CU需要将IAB node 2 DU与IAB node 2 MT part关联起来，因此在F1 setup request建立请求消息中除了携带gNB DU ID，还可以包含IAB node 2 MT part对应的C-RNTI及对应的NR CGI信息。在一些实施例中，在IAB node 2 MT part发送给IAB donor CU的RRC信令中携带collocated的gNB DU ID。In the embodiment of the present invention, the uplink data packet is delivered to the corresponding F1AP entity after 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, IAB donor CU needs to associate IAB node 2 DU with IAB node 2 MT part. Therefore, in addition to the gNB DU ID in the F1 setup request message, it can also include the corresponding IAB node 2 MT part. C-RNTI and corresponding NR CGI information. In some embodiments, the collocated gNB DU ID is carried in the RRC signaling sent by the IAB node 2 MT part to the IAB donor CU.
基于alternative 2，当IAB node对自身产生的数据包执行adapt layer处理时，下行控制信令转发处理如图6所示：Based on alternative 2, when the IAB node performs adapt layer processing on the data packets it generates, the downstream control signaling forwarding processing is shown in Figure 6:
S601、IAB donor CU产生了计划发送给IAB node2 DU的控制信令后，判断需要将该控制信令映射collocated IAB node 2 MT的哪个SRB进行转发。S601. After the IAB donor CU generates the control signaling that is planned to be sent to the IAB node2 DU, it determines which SRB of the collocated IAB node 2 MT to forward the control signaling to.
S602、IAB donor CU投递给collocated IAB node 2 MT对应SRB的PDCP实体进行加密。S602. The IAB donor CU delivers to the collocated IAB node 2 PDCP entity corresponding to the SRB for encryption.
S603、IAB donor CU将PDCP PDU映射投递到IAB donor CU与IAB donor DU之间的F1-C接口进行F1AP封装，并在F1AP消息中携带其内嵌的F1AP消息对应的SRB标识以及IAB node标识。S603. The IAB donor CU maps and delivers the PDCP PDU to the F1-C interface between the IAB donor CU and the IAB donor DU for F1AP encapsulation, and carries the SRB identifier and the IAB node identifier corresponding to the embedded F1AP message in the F1AP message.
在本发明实施例中，IAB node标识可以是IAB node DU标识，也可以是对应IAB node MT标识。In the embodiment of the present invention, the IAB node identifier may be the IAB node DU identifier or the corresponding IAB node MT identifier.
S604、IAB donor DU收到该F1AP信令后，解析出内部包含的IAB node标 识以及对应的SRB标识。S604. After receiving the F1AP signaling, the IAB donor DU parses out the IAB node identifier and the corresponding SRB identifier contained inside.
在本发明实施例中，IAB donor将解析处理的后续将IAB node标识以及对应的SRB标识包含在adapt头(header)中，用于路由转发功能；即IAB donor根据adapt header携带的信息，将F1AP信令发送到IAB node 2 MT。需要注意的是，为了保证F1AP信令的发送成功，adapt layer携带的标识类型信息需要与路由表保持一致。In the embodiment of the present invention, the IAB donor includes the IAB node identifier and the corresponding SRB identifier in the adapt header (header) after the parsing process, which is used for the routing and forwarding function; that is, the IAB donor adds the F1AP to the information carried in the adapt header. The signaling is sent to IAB node 2 MT. It should be noted that in order to ensure the successful transmission of F1AP signaling, the identification type information carried by the adapt layer needs to be consistent with the routing table.
S605、当IAB node 2 MT收到该F1AP信令后，根据adapt layer包含的IAB node标识，确定不同的处理过程。S605. After the IAB node 2 MT receives the F1AP signaling, it determines different processing procedures according to the IAB node identifier included in the adapt layer.
值得注意的是，当adapt layer包含的目标IAB node标识信息与自己一致，则将该F1AP信令投递到adapt指示的SRB进行PDCP解密，之后投递给对应IAB node2DU的F1AP实体对F1AP消息内容进行解析。It is worth noting that when the target IAB node identification information contained in the adapt layer is consistent with itself, the F1AP signaling will be delivered to the SRB indicated by the adapt for PDCP decryption, and then delivered to the F1AP entity corresponding to the IAB node2DU to analyze the content of the F1AP message. .
当adapt layer包含的目标IAB node标识信息与自己不一致，IAB node DU将解析出来的F1AP消息中包含的RRC消息投递给adapt layer，即将RRC消息继续投递给IAB node2，并增加新的adapt layer，此时adapt header只需指示该消息是否是MT终止(terminated)，无需再携带其他路由信息。When the target IAB node identification information contained in the adapt layer is inconsistent with itself, the IAB node DU will deliver the RRC message contained in the parsed F1AP message to the adapt layer, that is, continue to deliver the RRC message to IAB node2 and add a new adapt layer. At this time, the adapt header only needs to indicate whether the message is MT terminated, and no other routing information is required.
需要说明的是，是否采用alternative 2的IAB node CP协议栈，可以由运营商配置。例如在IAB node DU与IAB donor CU建立F1连接时，IAB node DU从运营商获取到基于PDCP的安全性(PDCP based security)指示配置时，采用alternative 2。在一些实施例中，还可以考虑IAB node DU向CU上报PDCP和/或数据包传输层安全性(Datagram Transport Layer Security，DTLS)based security能力指示，进而确定是否采用alternative 2。It should be noted that whether to use the alternative 2 IAB node CP protocol stack can 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 obtains the PDCP-based security indication configuration from the operator, and uses alternative 2. In some embodiments, it may also be considered that the IAB node DU reports the PDCP and/or Datagram Transport Layer Security (DTLS) based security capability indication to the CU, and then determines whether to adopt the alternative.
实施例六：Embodiment 6:
本发明实施例中，以基于alternative 4的CP协议栈设计，IAB node对自身产生的数据包和转发的数据都进行adaptation处理情况下，在F1AP消息和adapt子头中携带信息为例，对IAB网络控制信令处理方法进行说明；如图7所示，图7为alternative 4的CP协议栈设计的示意图，图7(a)表示UE的RRC消息发送处理过程，图7(b)表示MT的RRC消息发送处理处理，图7(c)表示DU的F1-AP的处理过程。可以理解的是，若IAB node 1MT part产生的RRC消息执行adapt layer处理，则MT的RRC信令与IAB node 1转发的信令可复用相同的SRB进行传输，基于上述alternative 4，当IAB node对自身产生的数据包执行adapt layer处理时，上行控制信令转发处理如图8所示：In the embodiment of the present invention, taking the CP protocol stack design based on alternative 4, the IAB node performs adaptation processing on both the data packets it generates and the data forwarded, and the information carried in the F1AP message and the adapt subheader is taken as an example. The network control signaling processing method is explained; as shown in Figure 7, Figure 7 is a schematic diagram of the alternative 4 CP protocol stack design, Figure 7(a) shows the UE’s RRC message sending process, and Figure 7(b) shows the MT RRC message sending processing, Fig. 7(c) shows the processing procedure of F1-AP of DU. It is understandable 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 can be multiplexed with the same SRB for transmission. Based on the above alternative 4, when the IAB node When adapt layer processing is performed on the data packets generated by itself, the upstream control signaling forwarding processing is shown in Figure 8:
S801、IAB node 2 MT part的adapt layer子头中携带用于区分控制信令的指 示信息。S801, IAB node 2 The adapt layer subheader of the MT part carries indication information for distinguishing control signaling.
在本发明实施例中，对于每个上行数据包，IAB node 2MT part的adapt layer子头中需包含一指示，用以告知IAB node1是否将上行数据包投递给F1AP layer，还是执行转发操作。该指示信息包括上行数据包是否是MT信令的指示，或是否是转发信令的指示。当adapt layer包括转发信令的指示时，表示该上行数据包是IAB node2转发UE的上行数据包，执行转发操作；当adapt layer包括MT信令的指示时，表示该上行数据包是IAB node2自身产生的上行数据包，投递到F1AP layer。In the embodiment of the present invention, for each uplink data packet, the adapt layer subheader of the IAB node 2MT part needs to include an indication to inform the IAB node1 whether to deliver the uplink data packet to the F1AP layer or perform a forwarding operation. The indication information includes an indication of whether the uplink data packet is MT signaling or whether it is an indication of forwarding signaling. When the adapt layer includes an indication of forwarding signaling, it means that the uplink data packet is that IAB node2 forwards the UE's uplink data packet to perform the forwarding operation; when the adapt layer includes an indication of MT signaling, it means that the uplink data packet is IAB node2 itself The generated uplink data packets are delivered to F1AP layer.
S802、IAB node1将目标DU信息添加到adapt header.S802, IAB node1 adds the target DU information to the adapt header.
在本发明实施例中，IAB node1在上行完成了F1AP消息封装，DTLS，SCTP，IP以及adapt封装，该adapt可以包含目标DU信息(如指示某个donor DU，例如图7中的donor DU)。在一些实施例中，目标DU标识信息通过donor CU为access IAB node配置路由表时配置；可以在adapt携带对应的一个或多个目标donor DU标识信息。In the embodiment of the present invention, the IAB node1 completes F1AP message encapsulation, DTLS, SCTP, IP, and adapt encapsulation in the uplink, and the adapt may include target DU information (such as indicating a certain donor DU, such as the donor DU in FIG. 7). In some embodiments, the target DU identification information is configured when the donor CU configures the routing table for the access IAB node; the corresponding one or more target donor DU identification information can be carried in the adapt.
S803、IAB donor DU接收上行数据包，确定adapt header中目标DU信息与自己一致，则去除adapt header，之后将上行数据包发送给IAB donor CU。S803. The IAB donor DU receives the uplink data packet, determines that the target DU information in the adapt header is consistent with itself, removes the adapt header, and then sends the uplink data packet to the IAB donor CU.
S804、当IAB donor CU收到该上行数据包后，对其进行解析，当解析到F1AP消息后，根据F1AP消息中包含的gNB-CU UE F1AP ID，gNB-DU UE F1AP ID确认对应的IAB node DU，并进行相应的处理。S804. When the IAB donor CU receives the uplink data packet, it parses it, and when the F1AP message is parsed, it confirms the corresponding IAB node according to the gNB-CU UE F1AP ID and gNB-DU UE F1AP ID contained in the F1AP message DU, and deal with it accordingly.
在本发明实施例中，在初始F1接口建立阶段，IAB donor CU需要将IAB node DU与IAB node MT part关联起来，因此可以考虑在F1setup request消息中携带IAB DU状态(status)指示，以及对应的MT的C-RNTI和MT接入的小区对应的NR CGI。在一些实施例中，在IAB node 2 MT part发送给IAB donor CU的RRC信令中携带collocated的gNB DU ID。In the embodiment of the present invention, in the initial F1 interface establishment phase, the IAB donor CU needs to associate the IAB node DU with the IAB node MT part, so it can be considered to carry the IAB DU status indication in the F1 setup request message and the corresponding The C-RNTI of the MT and the NR CGI corresponding to the cell the MT accesses. In some embodiments, the collocated gNB DU ID is carried in the RRC signaling sent by the IAB node 2 MT part to the IAB donor CU.
在一些实施例中，基于alternative 4，IAB node DU可直接在发送的F1 setup request中携带IAB DU status指示，以及对应的MT的C-RNTI和MT接入的小区对应的NR CGI。除了在F1AP消息中携带该信息，还可以考虑在IAB node 2 MT part发送给IAB donor CU的RRC信令中携带collocated的gNB DU ID。In some embodiments, based on alternative 4, the IAB node DU may directly carry the IAB DU status indicator in the F1 setup request sent, as well as the corresponding C-RNTI of the MT and the NR CGI corresponding to the cell to which the MT is connected. In addition to carrying this information in the F1AP message, it can also be considered to carry the collocated gNB DUID in the RRC signaling sent by the IAB node 2 MT part to the IAB donor CU.
基于alternative 4，当IAB node对自身产生的数据包执行adapt layer处理时，下行控制信令转发处理如图9所示：Based on alternative 4, when the IAB node performs adapt layer processing on the data packets it generates, the downstream control signaling forwarding processing is shown in Figure 9:
S901、IAB donor CU产生了计划发送给中间IAB node DU的控制信令后，生成对应的F1AP消息，进行DTLS，流控制传输协议(Stream Control Transmission Protocol，SCTP)，IP头封装，然后通过IP路由发送给IAB donor  DU。S901, IAB donor CU generates the control signaling that is planned to be sent to the intermediate IAB node DU, generates the corresponding F1AP message, performs DTLS, Stream Control Transmission Protocol (SCTP), IP header encapsulation, and then routes through IP Sent to IAB donor DU.
可以理解的是，IAB donor CU之前接收到过IAB donor DU转发的对应于中间IAB node DU为源IP的数据包，因此IP路由表可以相应的记录对应的反向路由信息。It is understandable that the IAB donor CU has previously received the data packet forwarded by the IAB donor DU that corresponds to the intermediate IAB node DU as the source IP, so the IP routing table can record the corresponding reverse routing information accordingly.
S902、IAB donor DU收到该IP数据包后，进行相应处理。S902. After receiving the IP data packet, the IAB donor DU performs corresponding processing.
在本发明实施例中，IAB donor DU根据IP路由中的IP地址得到目的(destination)IAB node DU标识，并将其封装在adapt header，其中IAB donor DU已经被配置IP地址与IAB node DU标识的mapping关系。In the embodiment of the present invention, the IAB donor DU obtains the destination IAB node DU identifier according to the IP address in the IP routing, and encapsulates it in the adapt header, where the IAB donor DU has been configured with the IP address and the IAB node DU identifier. mapping relationship.
在一些实施例中，IAB donor DU的路由表包含destination IP地址与next hop IAB node DU/MT ID的mapping关系，IAB donor DU根据IP地址信息将该控制信令发送给下一跳的IAB node，直到转发到IP地址与destination IP地址一致的IAB node DU。In some embodiments, the routing table of the IAB donor DU includes the mapping relationship between the destination IP address and the next hop IAB node DU/MT ID, and the IAB donor DU sends the control signaling to the next hop IAB node according to the IP address information. Until it is forwarded to the IAB node DU with the same IP address as the destination IP address.
需要说明的是，是否采用alternative 4的IAB node CP协议栈，可以由运营商配置。例如在IAB node DU与IAB donor CU建立F1连接时，IAB node DU从运营商获取到DTLS based security指示配置时，采用alternative 4。在一些实施例中，还可以考虑IAB node DU向CU上报PDCP和/或DTLS based security能力指示，进而确定是否采用alternative 4。It should be noted that whether to use the alternative 4 IAB node CP protocol stack can be configured by the operator. For example, when IAB node DU and IAB donor CU establish an F1 connection, when IAB node DU obtains the DTLS based security indication configuration from the operator, alternative 4 is used. In some embodiments, it may also be considered that the IAB node DU reports the PDCP and/or DTLS based security capability indication to the CU to determine whether to adopt the alternative 4.
实施例七：Embodiment Seven:
在本发明实施例中，以IAB网络链路中存在long term的拥塞，对该长期(long term)的拥塞进行缓解为例，进行说明。In the embodiment of the present invention, a long-term congestion is present in an IAB network link, and the long-term congestion is relieved as an example for description.
值得注意的是，对于long term的拥塞，IAB网络可采取的缓解方案包含以下任意之一：It is worth noting that for long term congestion, the mitigation schemes that the IAB network can take include any of the following:
方式一：DU向CU发送流控信息来缓解拥塞。该流控信息包括指示CU overload；可以理解的是，CU为UE创建新的DRB时，DU会进行接纳控制，对于已经接纳了的承载及对应的数据传输，当IAB链路中存在拥塞时，DU可向CU指示其过载(overload)，CU相应的采用overload减少动作(reduction action)减载操作；在一些实施例中，该流控信令包括DU请求释放某个UE上下文(context)，即DU还可以检测当前哪些保证比特速率(Guaranteed Bit Rate，GBR)bearer无法满足需求并告知CU，最后，DU可以主动释放掉某个UE的上下文等。在一些实施例中，该流控信令包括告知CU某个DRB无法满足服务质量(Quality of Service，QoS)需求，即DU进行接纳控制时，如果空口资源无法满足要求，DU可以直接告知CU哪些DRB无法成功创建。Method 1: DU sends flow control information to CU to relieve congestion. The flow control information includes an indication of CU overload; it is understandable that when the CU creates a new DRB for the UE, the DU will perform admission control. For the already admitted bearer and corresponding data transmission, when there is congestion in the IAB link, The DU can indicate its overload to the CU, and the CU accordingly adopts an overload reduction action (reduction action) to reduce the load; in some embodiments, the flow control signaling includes the DU requesting the release of a UE context, that is, The DU can also detect which Guaranteed Bit Rate (GBR) bearers cannot meet the demand and inform the CU. Finally, the DU can actively release the context of a certain UE. In some embodiments, the flow control signaling includes informing the CU that a certain DRB cannot meet the quality of service (QoS) requirements, that is, when the DU performs admission control, if the air interface resources cannot meet the requirements, the DU can directly inform the CU which DRB could not be successfully created.
方式二：CU向NGC发送如下流控信令来缓解拥塞。当radio resource unavailable(无线资源不可用)时，该流控信令包括CU请求释放某个UE的上下文；在一些实施例中，该流控信令包括CU发送PDU会话资源通知(session resource notify)，通知NGC无法满足某个GBR QoS flow/PDU session的QoS需求，甚至可能需要释放；在一些实施例中，该流控信令包括CU请求修改某个已经建立的PDU session。Method 2: CU sends the following flow control signaling to NGC to relieve congestion. When radio resource is unavailable (radio resources are not available), the flow control signaling includes the CU requesting to release the context of a certain UE; in some embodiments, the flow control signaling includes the CU sending PDU session resource notification (session resource notification) , Notify NGC that it cannot meet the QoS requirements of a GBR QoS flow/PDU session, and may even need to be released; in some embodiments, the flow control signaling includes a CU requesting to modify an established PDU session.
方式三：根据当前IAB网中的long term拥塞情况调整网络拓扑来缓解拥塞。在本发明实施例中，CU根据测量上报及DU overload指示，将某些IAB node MT切换到其他父(parent)DU；在一些实施例中，当路由包括成本信息成本度量(cost metric)，则cost metric的设计可以体现拥塞，从而体现潜在时延；例如cost metric较小的路径，其拥塞较少；因此IAB node传输数据时，为IAB node选择cost metric较小的路径，相当于选择了拥塞较少的路径，从而达到负荷均衡的效果。Method 3: Adjust the network topology according to the long term congestion in the current IAB network to relieve congestion. In the embodiment of the present invention, the CU switches some IAB node MTs to other parent DUs according to the measurement report and DU overload instruction; in some embodiments, when the route includes cost information, cost metric, then The design of cost metric can reflect congestion and thus potential delay; for example, a path with a smaller cost metric has less congestion; therefore, when an IAB node transmits data, choosing a path with a smaller cost metric for IAB node is equivalent to selecting congestion Fewer paths to achieve the effect of load balancing.
实施例八：Embodiment 8:
在本发明实施例中，以IAB网络链路中存在short term的拥塞，对该short term的拥塞进行缓解为例，具体以hop-by-hop flow control为例进行说明，如图10所示，图10为hop-by-hop flow control的示意图。可以理解的是，对于short term拥塞，通常出现在某一跳的转发路径上，不太可能出现整个转发路径都拥塞的情况，而hop–by-hop flow control用于一跳范围内中间IAB node之间的流控信息，因此更适合处理短期(short term)拥塞。In the embodiment of the present invention, taking short-term congestion in the IAB network link and mitigating the short-term congestion as an example, specifically hop-by-hop flow control is taken as an example for description, as shown in FIG. 10, Figure 10 is a schematic diagram of hop-by-hop flow control. It is understandable that for short term congestion, it usually occurs on the forwarding path of a certain hop. It is unlikely that the entire forwarding path will be congested, and hop-by-hop flow control is used for the intermediate IAB node within one hop. Therefore, it is more suitable for handling short-term congestion.
应当理解的是，hop-by-hop flow control包括1:1承载映射机制和N:1承载映射机制。此时，当采用1:1承载映射机制时，对于short term的拥塞，IAB网络可采取的缓解方案包含以下任意之一：It should be understood that 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 short-term congestion, the IAB network can take any of the following mitigation solutions:
方式一：UE bearer通过MAC CE向其parent IAB发送流控信息，并为该MAC CE分配一个专门的LCID。在本发明实施例中，该LCID指示流控信息。在MAC CE中包含与该UE bearer对应的与parent IAB link对应的LCID、desired buffer size和/或data rate。Method 1: The UE bearer sends flow control information to its parent IAB through the MAC CE, and assigns a special LCID to the MAC CE. In the embodiment of the present invention, the LCID indicates flow control information. The MAC CE includes the LCID, desired buffer size, and/or data rate corresponding to the parent IAB link corresponding to the UE bearer.
在本发明实施例中，该流控信息可以在IAB node DU检测到某个DRB或BH RLC channel的buffer超出给定门限后再发送desired buffer size，parent IAB接收到该流控信息后，为LCID分配资源。值得注意的是，根据desired buffer size值的不同，parent IAB分配资源的方式不同。例如desired buffer size值为0，则parent IAB node DU停止调度该逻辑信道的数据；如果desired buffer size大于0， 则对于RLC AM模式从TX_Next_Ack-1计算数据总量；对于RLC UM模式，则按照待调度发送的数据量计算。In the embodiment of the present invention, the flow control information can be sent after the IAB node DU detects that the buffer of a DRB or BH RLC channel exceeds a given threshold and then sends the desired buffer size. After the parent IAB receives the flow control information, it is the LCID Allocating resources. It is worth noting that, depending on the value of the desired buffer size, the parent IAB allocates resources in different ways. For example, if the desired buffer size value is 0, the parent IAB node DU stops scheduling the data of the logical channel; if the desired buffer size is greater than 0, the total amount of data is calculated from TX_Next_Ack-1 for the RLC AM mode; for the RLC UM mode, the total amount of data is calculated Calculate the amount of data scheduled to be sent.
在一些实施例中，如果IAB node DU检测到对应的BH RLC channel的buffer size小于给定门限，则通过流控信息中的LCID指示流控停止；或，IAB node DU将desired buffer size或desired data rate设置为最大允许值。当然在一些实施例中，还可以IAB node不再需要进行流控时，通过LCID指示流控停止。In some embodiments, if the IAB node DU detects that the buffer size of the corresponding BH RLC channel is smaller than a given threshold, the LCID in the flow control information is used to instruct the flow control to stop; or, the IAB node DU will either the desired buffer size or the desired data The rate is set to the maximum allowable value. Of course, in some embodiments, when the IAB node no longer needs to perform flow control, the LCID may be used to instruct the flow control to stop.
方式二：IAB node向parent IAB node DU发送携带流控相关信息的adapt layer。在本发明实施例中，IAB node可以通过适配层发送流控信息。IAB node在某个待转发给parent IAB node DU的对应承载的数据包上增加一个adapt layer控制信息，该adapt layer控制信息只有在进行流控指示时才添加，值得注意的是，在该adapt layer需要增加一个bit指示是否有流控信息存在，或直接指示是否有desire data rate和/或是否有desired buffer size存在。应当理解的是，Parent IAB node DU解析出流控信息后，需将其递交给MAC层用于辅助调度决策。值得注意的是，流控信息的发送具体包括以下方式：Method 2: The IAB node sends an adapt layer carrying flow control related information to the parent IAB node DU. In the embodiment of the present invention, the IAB node may send flow control information through the adaptation layer. The IAB node adds an adapt layer control information to a corresponding bearer data packet to be forwarded to the parent IAB node DU. The adapt layer control information is added only when the flow control instruction is performed. It is worth noting that in the adapt layer Need to add a bit to indicate whether there is flow control information, or directly indicate whether there is a desired data rate and/or whether there is a desired buffer size. It should be understood that after the Parent IAB node DU parses out the flow control information, it needs to be submitted to the MAC layer to assist in scheduling decisions. It is worth noting that the sending of flow control information specifically includes the following methods:
方式一：该流控信息在IAB node DU检测到某个DRB或BH RLC channel的buffer超出给定门限后再发送desired buffer size，如果desired buffer size为0，则parent IAB node停止在该RLC channel上发送数据。否则按照规定的buffer size发送。Method 1: The flow control information is sent after the IAB node DU detects that the buffer of a DRB or BH RLC channel exceeds a given threshold and then sends the desired buffer size. If the desired buffer size is 0, the parent IAB node stops on the RLC channel send data. Otherwise, it will be sent according to the specified buffer size.
方式二：IAB node DU检测到对应的BH RLC channel的buffer size小于给定门限，则发送流控停止指示。Method 2: The IAB node DU detects that the buffer size of the corresponding BH RLC channel is less than a given threshold, and then sends a flow control stop instruction.
方式三：IAB node DU检测到对应的BH RLC channel的buffer size小于给定门限，将buffer size设置为最大允许值，向parent node发送desired data rate。在一些实施例中，当不再需要进行flow control时，发送flow control终止(termination)指示。Method 3: 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 the desired data rate to the parent node. In some embodiments, when flow control is no longer needed, a flow control termination (termination) instruction is sent.
应当理解的是，N:1承载映射机制包括终端承载和BH RLC承载之间的承载映射；以及BH RLC承载之间的承载映射，当采用终端承载和BH RLC承载之间的承载映射时，如图11所示，UE1 DRB1和UE2 DRB1映射到BH RLC bearer 1，而UE1 DRB2映射到BH RLC bearer 2，此时对于short term的拥塞，IAB网络可采取的缓解方案包含以下任意之一：It should be understood that the N:1 bearer mapping mechanism includes bearer mapping between terminal bearers and BH RLC bearers; and bearer mapping between BH RLC bearers. When the bearer mapping between terminal bearers and BH RLC bearers is used, such as As shown in Figure 11, UE1 DRB1 and UE2 DRB1 are mapped to BH RLC bearer 1, and UE1 DRB2 is mapped to BH RLC bearer 2. At this time, for short-term congestion, the IAB network can take any of the following mitigation solutions:
方式一：IAB node 1 MT向IAB node 2 DU发送的流控信息，该流控信息对应于UE1 DRB1的desired buffer size和/或desired data rate。值得注意的是，该流控信息通过BH RLC bearer1对应的adapt发送或是在MAC CE中指示对应于BH RLC bearer1。Method 1: Flow control information sent by IAB node 1 MT to IAB node 2 DU, which corresponds to the desired buffer size and/or desired data rate of UE1 DRB1. It is worth noting that the flow control information is sent through adapt corresponding to BH RLC bearer1 or indicated in MAC CE to correspond to BH RLC bearer1.
方式二：IAB node 1 MT向IAB node 2 DU发送的流控信息，当IAB node 2 DU知道BH RLC bearer 1的RLC缓冲区内每个数据包内对应的UE bearer信息，当IAB node 1 MT发送流控信息对应于UE1 DRB1的desired buffer size和/或desired data rate时，此外流控信息还包括UE1和DRB标识信息，则该流控信息可以通过BH RLC bearer1对应的adapt发送或是在MAC CE中指示对应于BH RLC bearer 1。Method 2: IAB node 1 MT sends flow control information to IAB node 2 DU, when IAB node 2 DU knows the UE bearer information in each data packet in the RLC buffer of BH RLC bearer 1, when IAB node 1 MT sends When the flow control information corresponds to the desired buffer size and/or desired data rate of UE1 DRB1, and the flow control information also includes UE1 and DRB identification information, the flow control information can be sent through the adapt corresponding to BH RLC bearer1 or in MAC CE The middle indication corresponds to BH RLC bearer 1.
当IAB node 2 DU收到该信息时，判断对应于UE1 DRB1的能调度发送的数据量由desired buffer size或desired data rate决定。When the IAB node 2 DU receives the information, it judges that the amount of data that can be scheduled to be sent corresponding to the UE1 DRB1 is determined by the desired buffer size or the desired data rate.
方式三：当IAB node 1 DU能感知通过UE 1 DRB1传输的下行数据在BH RLC bearer 1整体传输数据量的比例(x％)，则IAB node 1 MT IAB node 1 MT向IAB node 2 DU发送的流控信息，该流控信息包括desired buffer size与传输数据量的比例的商，或desired data rate与desired data rate的商。Method 3: When the IAB node 1 DU can perceive the proportion (x%) of the downlink data transmitted by the UE 1 DRB1 in the BH RLC bearer 1 overall transmission data volume (x%), then the IAB node 1 MT IAB node 1 MT sent to the IAB node 2 DU Flow control information. The flow control information includes the quotient of the ratio of the desired buffer size to the amount of transmitted data, or the quotient of the desired data rate and the desired data rate.
方式四：如果某个UE DRB出现拥塞，则IAB node 1 MT统计所有映射到BH RLC bearer的UE DRB的desired buffer size/desired data rate之和，向IAB node 2 DU发送的流控信息，该流控信息包括所有映射到BH RLC bearer的UE DRB的desired buffer size或desired data rate之和。Method 4: If a certain UE DRB is congested, the IAB node 1 MT counts the sum of the desired buffer size/desired data rate of all UEs mapped to the BH RLC bearer, and sends the flow control information to the IAB node 2 DU. The control information includes the sum of the desired buffer size or desired data rate of all UE DRBs mapped to the BH RLC bearer.
值得注意的是，在本发明实施例中，当采用BH RLC bearer之间的bearer mapping时，如图12所示，BH RLC bearer 3和BH RLC bearer 5映射到BH RLC bearer 1，而BH RLC bearer 4映射到BH RLC bearer 2，此时对于short term的拥塞，IAB网络可采取的缓解方案包含以下任意之一：It is worth noting that, in the embodiment of the present invention, when the bearer mapping between BH RLC bearers is adopted, as shown in Figure 12, BH RLC bearer 3 and BH RLC bearer 5 are mapped to BH RLC bearer 1, and BH RLC bearer 4 is mapped to BH RLC bearer 2. At this time, for short-term congestion, the mitigation scheme that the IAB network can take includes any of the following:
方式一：IAB node 2 MT向IAB node 3 DU发送的流控信息，该流控信息对应于BH RLC bearer 3的desired buffer size和/或desired data rate时，该流控信息可以通过BH RLC bearer1对应的adapt发送，或是在MAC CE中指示对应于BH RLC bearer 1。Method 1: When the flow control information sent by the IAB node 2 MT to the IAB node 3 DU, the flow control information corresponds to the desired buffer size and/or desired data rate of the BH RLC bearer 3, the flow control information can be corresponded to by the BH RLC bearer1 The adapt sending of, or the indication in MAC CE corresponds to BH RLC bearer 1.
方式二：当IAB node 3 DU知道BH RLC bearer 1的RLC缓冲区内每个数据包内对应的UE bearer信息，IAB node 2 MT向IAB node 3 DU发送的流控信息，该流控信息对应于BH RLC bearer 3的desired buffer size和或desired data rate时，此外流控信息还包括映射到BH RLC bearer 3的一个或多个UE bearer标识信息。则流控信息可以通过BH RLC bearer1对应的adapt发送，或是在MAC CE中指示对应于BH RLC bearer 1。在一些实施例中，还可以通过RRC信令上报指示。Method 2: When the IAB node 3 DU knows the UE bearer information corresponding to each packet in the RLC buffer of the BH RLC bearer 1, the flow control information sent by the IAB node 2 MT to the IAB node 3 DU corresponds to the flow control information When the desired buffer size and/or desired data rate of the BH RLC bearer 3, the flow control information also includes one or more UE bearer identification information mapped to the BH RLC bearer 3. Then the flow control information can be sent through adapt corresponding to BH RLC bearer1, or it can be indicated in MAC CE to correspond to BH RLC bearer 1. In some embodiments, the indication may also be reported through RRC signaling.
当IAB node 3 DU收到该信息时，判断对应UE bearer集合能调度发送的数据量，由desired buffer size或desired data rate决定。When the IAB node 3 DU receives the information, it determines the amount of data that the corresponding UE bearer set can schedule to send, which is determined by the desired buffer size or the desired data rate.
方式三：当IAB node 2 DU能感知通过BH RLC bearer 3传输的下行数据在 BH RLC bearer 1整体传输数据量的比例(x％)，则IAB node 2 MT向IAB node 3 DU发送的流控信息，该流控信息包括desired buffer size与传输数据量的比例的商，或desired data rate与desired data rate的商。Method 3: When the IAB node 2 DU can perceive the proportion of the downlink data transmitted through the BH RLC bearer 3 (x%) of the overall transmission data volume of the BH RLC bearer 1, then the IAB node 2 MT sends the flow control information to the IAB node 3 DU The flow control information includes the quotient of the ratio of the desired buffer size to the amount of transmitted data, or the quotient of the desired data rate and the desired data rate.
方式四：当某个下行流(downstream)BH RLC bearer出现拥塞，则IAB node 2 MT统计所有映射到对应上行流(upstream)BH RLC bearer1的downstream BH RLC bearer的desired buffer size或desired data rate之和，发送给IAB node 3 DU。Method 4: When a certain downstream BH RLC bearer is congested, IAB node 2 MT counts the sum of all the downstream BH RLC bearer's desired buffer size or desired data mapped to the corresponding upstream BH RLC bearer1 , Sent to IAB node 3 DU.
实施例九：Example 9:
在本发明实施例中，对IAB donor CU进行集中式的资源协调进行说明。IAB node DU可向CU上报cell specific及UE specific的帧结构配置，CU根据DU的上报以及当前IAB网络的资源配置情况，为IAB node DU选择配置合适的cell specific及UE specific的帧结构。具体的，DU通过F1 setup消息或gNB-DU配置更新(configuration update)消息将cell-specific的时隙格式(slot format)发送给CU，可选地，DU通过UE需要上下文修改(context modification required)消息将IAB node MT或UE的UE specific的slot format发送给CU。因此，IAB donor CU可向DU发送资源协调信息，对DU进行资源配置。In the embodiment of the present invention, the centralized resource coordination performed by the IAB donor CU will be described. The IAB node DU can report the cell-specific and UE-specific frame structure configuration to the CU. The CU selects and configures the appropriate cell-specific and UE-specific frame structure for the IAB node DU according to the DU report and the current IAB network resource configuration. Specifically, the DU sends the cell-specific slot format to the CU through the F1 setup message or the gNB-DU configuration update message. Optionally, the DU needs context modification (context modification required) through the UE. The message sends the IAB node MT or the UE specific slot format of the UE to the CU. Therefore, the IAB donor CU can send resource coordination information to the DU to configure the resources of the DU.
当该资源协调信息包括F1AP信息，CU通过F1AP向DU发送对应于DU的各个符号资源对应的D-H，D-S，U-H，U-S，F-H，F-S，not available指示。When the resource coordination information includes F1AP information, the CU sends the D-H, D-S, U-H, U-S, F-H, F-S, not available indication corresponding to each symbol resource of the DU to the DU through F1AP.
在本发明实施例中，IAB donor CU可通过F1AP向IAB node DU part发送的F1接口(interface)管理消息中(如F1 setup响应(response)，gNB-CU configuration update)携带DU资源配置。该DU资源配置是每小区(per-cell)进行指示。该配置用于IAB node DU part的child link的上行和下行通信及资源分配。该F1AP信息属于non-UE specific的F1信令。该资源指示可以用于DU确定child BH link以及child access link上的上行及下行资源分配；IAB node DU part需知道接入的child IAB node DU part对应的slot format，例如哪些是不可用的时间资源(not available time resource)，哪些是软资源(soft resource)，从而使得IAB node DU part可以通过显示和或隐式控制这些soft resource(time resource类型可为D，U或F)是否对child IAB node DU part的child link可用。IAB donor DU及IAB node DU可以根据其接收到的CU通过F1AP发送的半静态帧结构及资源指示，判断可用于child link的上行及下行资源，从而进行相应的资源配置。In the embodiment of the present invention, the IAB donor CU may carry the DU resource configuration in the F1 interface management message (such as the F1 setup response (response), gNB-CU configuration update) sent to the IAB node DU part through the F1AP. The DU resource configuration is indicated per cell (per-cell). This configuration is used for the uplink and downlink communication and resource allocation of the child link of the IAB node DU part. The F1AP information belongs to non-UE specific F1 signaling. This resource indicator can be used by the DU to determine the allocation of uplink and downlink resources on the child BH link and child access link; IAB node DU part needs to know the slot format corresponding to the child IAB node DU part of the access, such as which time resources are not available (not available time resource), which are soft resources, so that the IAB node DU part can display and or implicitly control whether these soft resources (time resource type can be D, U or F) are for child IAB node The child link of DU part is available. The IAB donor DU and IAB node DU can determine the uplink and downlink resources that can be used for the child link according to the semi-static frame structure and resource indication sent by the CU through the F1AP, so as to configure the corresponding resources.
当该资源协调信息包括RRC信息。在本发明实施例中，CU可以通过RRC信令为IAB node MT part配置半静态的帧结构，包括cell-specific以及UE-specific 的帧结构配置；或，CU可以通过RRC信令向IAB node MT part发送半静态资源配置(type 2 for DL，type 1 and 2 for UL)。该配置用于IAB node MT part与parent link之间的上行和下行通信及资源分配；或，CU可以通过RRC信令为normal UE配置半静态的帧结构，包括cell-specific以及UE-specific的帧结构配置以及进行半静态资源配置。When the resource coordination information includes RRC information. In the embodiment of the present invention, the CU can configure the semi-static frame structure for the IAB node MT part through RRC signaling, including cell-specific and UE-specific frame structure configurations; or, the CU can send the IAB node MT through RRC signaling. The part sends semi-static resource configuration (type 2 for DL, type 1 and 2 for UL). This configuration is used for uplink and downlink communication and resource allocation between IAB node MT part and parent link; or, CU can configure a semi-static frame structure for normal UE through RRC signaling, including cell-specific and UE-specific frames Structural configuration and semi-static resource configuration.
在一些实施例中，DU还可以通过资源协调信息为其服务的MT或一般的(normal)UE进行资源配置，此时该资源协调信息还可以包括L1 signalling信息。例如IAB donor DU及IAB node DU通过L1 signalling向其服务的IAB node MT以及normal UE发送SFI进行动态slot format配置和DCI/UCI scheduling进行动态资源分配；又例如parent IAB donor/node DU通过L1 signalling向其服务的IAB node MT发送SFI或其他帧结构配置信息，该信息用于调整co-located的IAB node DU的child link的帧结构及资源配置。在一些实施例中，当IAB node DU通过时隙格式指示符(Slot Format Indicator，SFI)child link上的可变符号(Flexible symbol)进行F指示后，可通过其共址(co-located)的IAB node MT向其parent IAB node发送对应的指示，此时parent IAB node可以使用对应的资源进行上行或下行传输。IAB donor DU及IAB node DU可以根据其parent node通过L1信令发送的动态帧结构指示及资源指示，判断可用于child link的上行及下行资源，从而进行相应的资源配置。In some embodiments, the DU may also use resource coordination information to configure resources for the MT or normal UE it serves. In this case, the resource coordination information may also include L1 signalling information. For example, IAB donor DU and IAB node DU send SFI to the IAB node MT and normal UE they serve through L1 signalling for dynamic slot format configuration and DCI/UCI scheduling for dynamic resource allocation; another example is parent IAB donor/node DU through L1 signalling to The IAB node MT it serves sends SFI or other frame structure configuration information, which is used to adjust the frame structure and resource configuration of the child link of the co-located IAB node DU. In some embodiments, when the IAB node DU uses the slot format indicator (Slot Format Indicator, SFI) variable symbol (Flexible symbol) on the child link to indicate F, it can use its co-located The IAB node MT sends a corresponding instruction to its parent IAB node. At this time, the parent IAB node can use the corresponding resources for uplink or downlink transmission. The IAB donor DU and IAB node DU can determine the uplink and downlink resources that can be used for the child link according to the dynamic frame structure indication and resource indication sent by their parent node through L1 signaling, so as to configure the corresponding resources.
在本发明实施例中，具体的slot format配置可以由CU统一协调，此外DU可以发送一些建议信息，CU在此基础上进行集中式配置。对于IAB node DU配置的F子帧，如果某一跳链路将其配置为下行/下行资源，则相邻的更高以及更低一跳的parent IAB node DU以及child IAB node MT都不能再使用该资源。因此无论是D/U还是F，都需要与INA按照hop order交错配置。另一方面，如果parent IAB node DU判断其资源充足，有较多的空闲slot，则可以在这些slot上指示对应的IAB node DU的soft资源为可用。In the embodiment of the present invention, the specific slot format configuration can be uniformly coordinated by the CU. In addition, the DU can send some suggestion information, and the CU performs centralized configuration on this basis. For the F subframe configured by the IAB node DU, if a certain hop link is configured as a downlink/downlink resource, the adjacent higher and lower hop parent IAB node DU and child IAB node MT can no longer be used The resource. Therefore, whether it is D/U or F, it needs to be interleaved with INA in hop order. On the other hand, if the parent IAB node DU judges that its resources are sufficient and there are more idle slots, it can indicate that the soft resources of the corresponding IAB node DU are available on these slots.
实施例十：Embodiment ten:
本发明实施例中对DU内(intra-DU)，CU内(intra-CU)以及CU间(inter-CU)三种场景下的切换进行说明，如图13所示。In the embodiment of the present invention, the switching in the three scenarios of intra-DU (intra-DU), intra-CU (intra-CU) and inter-CU (inter-CU) is described, as shown in FIG. 13.
S1301、IAB node对当前接入的parent IAB node进行测量上报。S1301. The IAB node measures and reports the currently connected parent IAB node.
S1002、上报结果经parent node以及中间节点的转发发送给IAB donor CU。如果IAB donor CU判断满足切换的条件，则可为IAB node MT选择目标(target)parent IAB DU。S1002, the report result is forwarded to the IAB donor CU by the parent node and the intermediate node. If the IAB donor CU determines that the handover conditions are met, it can select the target parent IAB DU for the IAB node MT.
S1303、经过切换准备后，IAB donor CU将切换命令发送给IAB node MTS1303. After the handover preparation, IAB donor CU sends the handover command to IAB node MT
S1304、IAB node MT接收到切换命令后，可根据切换命令包含的UE specific的帧结构配置识别slot格式，然后执行随机接入过程到target parent IAB DU。After S1304, the IAB node MT receives the handover command, it can identify the slot format according to the UE-specific frame structure configuration included in the handover command, and then execute the random access process to the target parent IAB DU.
可以理解的是，在IAB进行切换或发生无线链路失败(Radio Link Failure，RLF)时，会对资源配置影响；由于parent IAB DU发生了变化，因此IAB node DU的帧格式应当也需要更新。在本发明实施例中，IAB node MT完成切换后，IAB donor CU向其关联的IAB node DU发送gNB CU configuration update消息，为其更新DU part的帧结构配置。需要注意的是，IAB node DU对应的帧结构格式配置包括cell-specific和UE specific的配置。对于UE specific的帧格式配置，可以通过RRC信令由CU发送给接入的UE或是child IAB node MT。而对于cell specific的配置，传统NR规范中是由DU确定并包含在***信息块(System Information Block1，SIB1)中，由DU通知CU。而在IAB场景下，IAB donor CU可以通过F1 setup response消息或是gNB CU configuration update消息发送IAB node DU的帧结构配置。相应的IAB node DU可组装或更新SIB1***信息，并广播发送。It is understandable that when an IAB is switched or a radio link failure (Radio Link Failure, RLF) occurs, resource configuration will be affected; since the parent IAB DU has changed, the frame format of the IAB node DU should also need to be updated. In the embodiment of the present invention, after the IAB node MT completes the handover, the IAB donor CU sends a gNB CU configuration update message to its associated IAB node DU to update the DU part frame structure configuration. It should be noted that the frame structure format configuration corresponding to the IAB node DU includes cell-specific and UE-specific configurations. The UE-specific frame format configuration can be sent by the CU to the accessing UE or child IAB node MT through RRC signaling. As for the cell-specific configuration, the traditional NR specification is determined by the DU and included in the system information block (System Information Block 1, SIB1), and the DU informs the CU. In the IAB scenario, the IAB donor CU can send the frame structure configuration of the IAB node DU through the F1 setup response message or the gNB CU configuration update message. The corresponding IAB node DU can assemble or update the SIB1 system information and broadcast it.
在一些实施例中，IAB donor CU在向IAB node发送切换命令时，其中的RRC重配消息中就已经包含了IAB node DU对应的帧结构格式配置。这样可以减少IAB node DU帧结构改变带来的时延，降低干扰。In some embodiments, when the IAB donor CU sends the handover command to the IAB node, the RRC reconfiguration message therein already contains the frame structure format configuration corresponding to the IAB node DU. This can reduce the delay caused by the change of IAB node DU frame structure and reduce interference.
IAB node DU的帧结构格式发生更新后，IAB node DU的SIB1有可能发生变化，另外其服务的所有child IAB node及child UE的UE specific帧格式也有可能发生变化，对应的其子DU的子DU(grandchild DU)的帧格式也有可能发生变化。对于这个问题，建议尽量选择hop顺序(order)相同的parent IAB node。此外如果帧格式发生变化，建立***信息更新后立即生效。After the frame structure format of the IAB node DU is updated, the SIB1 of the IAB node DU may change. In addition, the UE specific frame format of all child IAB nodes and child UEs it serves may also change, corresponding to the child DU of its child DU. The frame format of (grandchild DU) may also change. For this problem, it is recommended to choose the parent IAB node with the same hop order as much as possible. In addition, if the frame format changes, it will take effect immediately after the system information is updated.
在本发明实施例中，当IAB node出现RLF，则IAB node可以考虑选择新的parent IAB node，试图进行重建，当IAB node重建成功时，可从新的parent IAB node获取对应于IAB node MT的更新的UE specific帧结构配置和/或IAB node DU的cell-specific的资源配置。In the embodiment of the present invention, when an RLF appears on the IAB node, the IAB node may consider selecting a new parent IAB node and attempt to rebuild. When the IAB node is successfully rebuilt, it can obtain the update corresponding to the IAB node MT from the new parent IAB node The UE specific frame structure configuration and/or the cell-specific resource configuration of the IAB node DU.
如果是NR-NR双连接(Dual-Connectivity，DC)场景，donor CU为IAB node MT在主小区(Primary Cell，PCell)和辅小区(Secondary Cell，SCell)上配置不相交的UE specific帧格式。If it is an NR-NR dual-connectivity (DC) scenario, the donor CU is the IAB node and MT configures disjoint UE-specific frame formats on the primary cell (Primary Cell, PCell) and the secondary cell (Secondary Cell, SCell).
实施例十一：Embodiment 11:
本实施例还提供了一种IAB，参见图14所示，其包括IAB包括处理器1401、 存储器1402及通信总线1403，其中：通信总线1403用于实现处理器1401和存储器1402之间的连接通信；处理器1401用于执行存储器1402中存储的一个或者多个计算机程序，以实现如上述各实施例中的IAB网络中信息处理方法中的至少一个步骤。This embodiment also provides an IAB. As shown in FIG. 14, it includes an IAB including a processor 1401, a memory 1402, and a communication bus 1403. The communication bus 1403 is used to implement connection and 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 in the information processing method in the IAB network in the foregoing embodiments.
本实施例还提供了一种计算机存储介质，该计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、计算机程序模块或其他数据)的任何方法或技术中实施的易失性或非易失性、可移除或不可移除的介质。计算机存储介质包括但不限于RAM(Random Access Memory，随机存取存储器)，ROM(Read-Only Memory，只读存储器)，EEPROM(Electrically Erasable Programmable read only memory，带电可擦可编程只读存储器)、闪存或其他存储器技术、CD-ROM(Compact Disc Read-Only Memory，光盘只读存储器)，数字多功能盘(Digital Versatile Disc，DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。This embodiment also provides a computer storage medium, which includes volatile information implemented in any method or technology for storing information (such as computer readable instructions, data structures, computer program modules, or other data). Or non-volatile, removable or non-removable media. Computer storage media include but are not limited to RAM (Random Access Memory), ROM (Read-Only Memory, 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 Disc (DVD) or other optical disk storage, magnetic cassettes, tapes, magnetic disk storage or other magnetic storage A device or any other medium that can be used to store desired information and can be accessed by a computer.
本实施例中的计算机存储介质可用于存储一个或者多个计算机程序，其存储的一个或者多个计算机程序可被处理器执行，以实现上述各实施例中的IAB网络中信息处理方法中的至少一个步骤。The computer storage medium in this embodiment can be used to store one or more computer programs, and the stored one or more computer programs can be executed by a processor to implement at least one of the information processing methods in the IAB network in the above embodiments One step.
本实施例还提供了一种计算机程序产品，包括计算机可读装置，该计算机可读装置上存储有如上所示的计算机程序。本实施例中该计算机可读装置可包括如上所示的计算机存储介质。This embodiment also provides a computer program product, including a computer readable device, and the computer readable device stores the computer program as shown above. In this embodiment, the computer-readable device may include the computer storage medium shown above.
可见，本领域的技术人员应该明白，上文中所公开方法中的全部或某些步骤、***、装置中的功能模块/单元可以被实施为软件(可以用计算装置可执行的计算机程序代码来实现)、固件、硬件及其适当的组合。在硬件实施方式中，在以上描述中提及的功能模块/单元之间的划分不一定对应于物理组件的划分；例如，一个物理组件可以具有多个功能，或者一个功能或步骤可以由若干物理组件合作执行。某些物理组件或所有物理组件可以被实施为由处理器，如中央处理器、数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。It can be seen that those skilled in the art should understand that all or some of the steps, functional modules/units in the system, and devices in the methods disclosed above can be implemented as software (which can be implemented by computer program code executable by a computing device ), firmware, hardware and their appropriate combination. In hardware implementations, the division between 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 consist of several physical components. The components are executed cooperatively. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit .
此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、计算机程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。所以，本申请不限制于任何特定的硬件和软件结合。In addition, as is well known to those of ordinary skill in the art, communication media usually contain computer-readable instructions, data structures, computer program modules, or other data in a modulated data signal such as carrier waves or other transmission mechanisms, and may include any information delivery medium. Therefore, this application is not limited to any specific hardware and software combination.

Claims (32)

  1. 一种自接入回传链路IAB网络中信息处理方法，包括：A method for processing information in a self-access backhaul link IAB network, including:
    第一IAB节点获取第一数据包；The first IAB node obtains the first data packet;
    所述第一IAB节点发送所述第一数据包至IAB宿主donor。The first IAB node sends the first data packet to the IAB host donor.
  2. 如权利要求1所述的方法，其中，所述第一IAB节点获取第一数据包，包括以下之一：The method according to claim 1, wherein the obtaining of the first data packet by the first IAB node includes one of the following:
    所述第一IAB节点接收用户设备UE发送的无线资源控制RRC消息；The first IAB node receives the radio resource control RRC message sent by the user equipment UE;
    所述第一IAB节点自身移动终端MT生成的RRC消息；The RRC message generated by the mobile terminal MT of the first IAB node;
    所述第一IAB节点自身分布式单元DU生成的F1应用协议F1AP消息。The F1 application protocol F1AP message generated by the distributed unit DU of the first IAB node.
  3. 如权利要求2所述的方法，在所述第一IAB节点获取第一数据包之后，还包括：The method according to claim 2, after the first IAB node obtains the first data packet, further comprising:
    所述第一IAB节点为所述第一数据包添加适配层包头；其中，所述适配层包头中包括以下信息中的至少之一：The first IAB node adds an adaptation layer header to the first data packet; wherein, the adaptation layer header includes at least one of the following information:
    目标节点信息；IAB节点标识信息；IAB节点产生和/或转发的控制信令/数据携带标志信息；所述第一数据包所属控制面承载标识。Target node information; IAB node identification information; control signaling/data carrying identification information generated and/or forwarded by the IAB node; and control plane carrying identification to which the first data packet belongs.
  4. 如权利要求3所述的方法，其中，所述第一IAB节点发送所述第一数据包至IAB donor，包括：The method of claim 3, wherein the first IAB node sending the first data packet to the IAB donor includes:
    所述第一IAB节点直接发送所述第一数据包至所述IAB donor；The first IAB node directly sends the first data packet to the IAB donor;
    或者，所述第一IAB节点发送的所述第一数据包经过至少一个中间节点转发至所述IAB donor。Alternatively, the first data packet sent by the first IAB node is forwarded to the IAB donor through at least one intermediate node.
  5. 如权利要求1所述的方法，在所述IAB donor接收所述第一IAB节点的第一数据包之后，还包括：The method according to claim 1, after the IAB donor receives the first data packet of the first IAB node, further comprising:
    所述IAB donor将所述第一数据包封装在IAB donor DU的F1AP消息中，所述F1AP消息包括：所封装的分组数据汇聚协议协议数据单元PDCP PDU对应的IAB节点标识以及承载标识信息。The IAB donor encapsulates the first data packet in the F1AP message of the IAB donor DU, and the F1AP message includes: the encapsulated packet data convergence protocol protocol data unit PDCP PDU corresponding to the IAB node identification and bearer identification information.
  6. 一种自接入回传链路IAB网络中信息处理方法，包括以下之一：A method for processing information in a self-access backhaul link IAB network, including one of the following:
    IAB节点发送流控信息至父IAB节点；The IAB node sends flow control information to the parent IAB node;
    其中，所述父IAB节点为所述IAB节点以连接身份所接入的IAB节点。Wherein, the parent IAB node is an IAB node accessed by the IAB node as a connection.
  7. 根据权利要求6所述的方法，其中，所述流控信息包括以下至少之一：The method according to claim 6, wherein the flow control information includes at least one of the following:
    至少一个承载标识；At least one bearer identifier;
    至少一个逻辑信道标识；At least one logical channel identifier;
    用户设备UE标识或IAB节点的节点标识信息；User equipment UE identity or node identity information of the IAB node;
    需要的缓存大小desired buffer size信息；Desired buffer size information;
    需要的数据速率desired data rate信息；Desired data rate information;
    流控指示。Flow control instructions.
  8. 根据权利要求7所述的方法，其中，所述desired buffer size信息，包括以下至少之一：The method according to claim 7, wherein the desired buffer size information includes at least one of the following:
    UE的承载或逻辑信道对应的desired buffer size；The desired buffer size corresponding to the bearer or logical channel of the UE;
    所述IAB节点的承载或逻辑信道对应的desired buffer size。The desired buffer size corresponding to the bearer or logical channel of the IAB node.
  9. 根据权利要求7所述的方法，其中，所述desired data rate信息，包括以下至少之一：The method according to claim 7, wherein the desired data rate information includes at least one of the following:
    UE的承载或逻辑信道对应的desired data rate；The desired data rate corresponding to the bearer or logical channel of the UE;
    所述IAB节点的承载或逻辑信道对应的desired data rate。The desired data rate corresponding to the bearer or logical channel of the IAB node.
  10. 一种自接入回传链路IAB网络中信息处理方法，包括以下之一：A method for processing information in a self-access backhaul link IAB network, including one of the following:
    IAB宿主donor集中式单元CU发送下行信息至IAB donor分布式单元DU；The IAB host donor centralized unit CU sends downlink information to the IAB donor distributed unit DU;
    IAB donor CU发送下行信息至IAB节点；IAB donor CU sends downlink information to the IAB node;
    父IAB节点转发下行信息至IAB节点；The parent IAB node forwards downlink information to the IAB node;
    其中，所述下行信息包括无线资源控制RRC消息，或F1应用协议F1AP消息。Wherein, the downlink information includes a radio resource control RRC message or an F1 application protocol F1AP message.
  11. 权利要求10所述的方法，其中，所述IAB donor CU发送下行信息至IAB节点，包括：The method of claim 10, wherein the IAB donor CU sending downlink information to an IAB node includes:
    所述IAB donor CU发送下行信息至IAB donor DU，通过所述IAB donor DU转发所述下行信息至所述IAB节点；The IAB donor CU sends downlink information to the IAB donor DU, and forwards the downlink information to the IAB node through the IAB donor DU;
    或者，所述IAB donor CU发送下行信息至IAB donor DU，所述IAB donor DU经过至少一跳转发所述下行信息至所述IAB节点。Alternatively, the IAB donor CU sends downlink information to the IAB donor DU, and the IAB donor DU sends the downlink information to the IAB node after at least one hop.
  12. 根据权利要求10所述的方法，其中，在所述下行信息包括F1AP消息的情况下，所述F1AP消息包括以下信息中的至少之一：The method according to claim 10, wherein, in a case where the downlink information includes an F1AP message, the F1AP message includes at least one of the following information:
    目标节点信息；所述F1AP消息所属控制面承载标识信息；IAB donor DU配置信息；IAB节点DU配置信息。Target node information; control plane bearer identification information to which the F1AP message belongs; IAB donor DU configuration information; IAB node DU configuration information.
  13. 如权利要求12所述的方法，其中，所述IAB donor DU配置信息包括：The method according to claim 12, wherein the IAB donor DU configuration information includes:
    IAB donor DU接收互联网协议IP地址与IAB节点标识的映射mapping关 系；IAB donor DU receives the mapping relationship between Internet Protocol IP address and IAB node identifier;
    或，or,
    所述IAB donor DU的路由表包含目的IP地址与下一跳IAB节点标识的mapping关系。The routing table of the IAB donor DU includes a mapping relationship between the destination IP address and the next hop IAB node identifier.
  14. 如权利要求12所述的方法，其中，所述IAB节点DU配置信息包括：The method of claim 12, wherein the IAB node DU configuration information includes:
    对应于IAB节点DU的多个符号资源对应的D-H，D-S，U-H，U-S，F-H，F-S，不可用not available指示。The D-H, D-S, U-H, U-S, F-H, F-S corresponding to the multiple symbol resources of the IAB node DU are not available indication.
  15. 根据权利要求10所述的方法，在所述父IAB节点转发下行信息至IAB节点之后，还包括：The method according to claim 10, after the parent IAB node forwards downlink information to the IAB node, further comprising:
    所述父IAB节点DU为所述下行控制信息添加适配层包头，所述适配层包头中包括移动终端MT终止信息。The parent IAB node DU adds an adaptation layer header to the downlink control information, and the adaptation layer header includes mobile terminal MT termination information.
  16. 根据权利要求10所述的方法，其中，在所述下行控制信息消息包括RRC消息的情况下，所述RRC消息包括以下信息中的至少之一：The method according to claim 10, wherein, in a case where the downlink control information message includes an RRC message, the RRC message includes at least one of the following information:
    所述IAB节点的半静态帧结构；The semi-static frame structure of the IAB node;
    所述IAB节点的半静态资源配置；Semi-static resource configuration of the IAB node;
    用户设备UE的半静态帧结构。The semi-static frame structure of the user equipment UE.
  17. 一种自接入回传链路IAB网络中控制信息处理方法，包括：A method for processing control information in a self-access backhaul link IAB network, including:
    IAB节点向所述IAB节点的下一跳IAB节点发送信息。The IAB node sends information to the next hop IAB node of the IAB node.
  18. 如权利要求17所述的方法，其中，所述信息包括IAB节点产生和/或转发的上行消息携带标志信息；The method according to claim 17, wherein the information includes uplink message carrying flag information generated and/or forwarded by the IAB node;
    所述IAB节点产生和/或转发的上行消息携带标志信息包括以下至少之一：The flag information carried in the uplink message generated and/or forwarded by the IAB node includes at least one of the following:
    所述IAB节点的自适应子头中携带是否是移动终端MT信令的指示信息；The adaptive subheader of the IAB node carries indication information whether it is mobile terminal MT signaling;
    所述IAB节点的自适应子头中携带是否是转发信令的指示信息；The adaptive subheader of the IAB node carries indication information whether it is forwarding signaling;
    下一跳IAB节点的自适应子头中携带封装的控制信令对应的所述IAB节点及信令无线承载SRB的标识信息。The adaptive subheader of the next-hop IAB node carries the identification information of the IAB node and the signaling radio bearer SRB corresponding to the encapsulated control signaling.
  19. 如权利要求17所述的方法，其中，IAB节点包括IAB宿主donor，所述信息包括IAB节点产生和/或转发的下行消息携带标志信息；The method according to claim 17, wherein the IAB node includes an IAB host donor, and the information includes downlink message carrying flag information generated and/or forwarded by the IAB node;
    所述方法还包括：IAB donor集中式单元CU在F1应用协议F1AP消息中携带内嵌的F1AP消息对应的SRB标识以及IAB节点标识，其中，所述IAB节点标识包括IAB节点分布式单元node DU标识，或并置IAB节点移动终端 collocated IAB node MT标识。The method further includes: the IAB donor centralized unit CU carries the SRB identifier corresponding to the embedded F1AP message and the IAB node identifier in the F1 application protocol F1AP message, wherein the IAB node identifier includes the IAB node distributed unit node DU identifier , Or collocated IAB node mobile terminal collocated IAB node MT identification.
  20. 如权利要求19所述的方法，在所述IAB donor CU在F1AP消息中携带内嵌的F1AP消息对应的SRB标识以及IAB节点标识之后，还包括：The method according to claim 19, after the IAB donor CU carries the SRB identifier corresponding to the embedded F1AP message and the IAB node identifier in the F1AP message, the method further includes:
    IAB donor DU收到所述IAB donor CU发送的所述F1AP消息后，解析出所述F1AP消息内部包含的所述IAB节点标识以及所述SRB标识；After the IAB donor DU receives the F1AP message sent by the IAB donor CU, it parses out the IAB node identifier and the SRB identifier contained in the F1AP message;
    在自适应子头中封装所述IAB节点标识及所述SRB标识，将所述F1AP消息经过中间节点转发给下一跳IAB节点。The IAB node identifier and the SRB identifier are encapsulated in an adaptive subheader, and the F1AP message is forwarded to the next-hop IAB node through the intermediate node.
  21. 如权利要求20所述的方法，在所述在自适应子头中封装所述IAB节点标识及所述SRB标识，将所述F1AP消息经过中间节点转发给下一跳IAB节点之后，还包括：The method according to claim 20, after encapsulating the IAB node identifier and the SRB identifier in an adaptive subheader, and forwarding the F1AP message to the next-hop IAB node through an intermediate node, the method further comprises:
    所述下一跳IAB节点收到包含所述F1AP消息的数据包后，在确定所述IAB节点标识与自身的标识不一致的情况下，所述下一跳IAB节点将解析出来的F1AP消息中包含的无线资源控制RRC消息投递给适配层。After the next-hop IAB node receives the data packet containing the F1AP message, in the case where it is determined that the IAB node ID is inconsistent with its own ID, the next-hop IAB node will parse the F1AP message that contains The radio resource control RRC message is delivered to the adaptation layer.
  22. 如权利要求21所述的方法，在所述下一跳IAB节点将解析出来的F1AP消息中包含的RRC消息投递给适配层之后，还包括：The method according to claim 21, after the next-hop IAB node delivers the RRC message contained in the parsed F1AP message to the adaptation layer, further comprising:
    所述下一跳IAB节点在适配层子头中添加MT终止指示。The next hop IAB node adds an MT termination indication in the adaptation layer subheader.
  23. 如权利要求17所述的方法，其中，所述信息包括：流控信息；The method according to claim 17, wherein the information comprises: flow control information;
    所述流控信息包括以下至少之一：用户设备UE承载或所述IAB节点对应的逻辑信道标识符LCID、需要的缓存大小desired buffer size、需要的数据速率desired data rate。The flow control information includes at least one of the following: a logical channel identifier LCID carried by the user equipment UE or corresponding to the IAB node, a desired buffer size, and a desired data rate.
  24. 如权利要求23所述的方法，在所述IAB节点发送信息给下一跳IAB节点之后，还包括以下至少之一：The method according to claim 23, after the IAB node sends the information to the next-hop IAB node, further comprising at least one of the following:
    所述下一跳IAB节点接收所述流控信息，确定剩余desired buffer size值为0，停止调度所述逻辑信道的数据；The next-hop IAB node receives the flow control information, determines that the remaining desired buffer size is 0, and stops scheduling the data of the logical channel;
    确定剩余desired buffer size大于0，对于无线链路控制确认模式RLC AM从TX_Next_Ack-1计算数据总量，对于RLC非确认模式UM按照待调度发送的数据量计算。It is determined that the remaining desired buffer size is greater than 0, the total amount of data is calculated from TX_Next_Ack-1 for the radio link control confirmation mode RLC AM, and the amount of data to be scheduled for transmission is calculated for the RLC unacknowledged mode UM.
  25. 如权利要求17所述的方法，其中，所述信息包括：流控信息；The method according to claim 17, wherein the information comprises: flow control information;
    所述流控信息包括以下至少之一：自适应层携带是否有流控信息存在；直接指示是否有desire data rate；直接指示是否有desired buffer size存在。The flow control information includes at least one of the following: whether there is flow control information carried by the adaptation layer; directly indicating whether there is a desired data rate; directly indicating whether there is a desired buffer size.
  26. 如权利要求25所述的方法，其中，所述IAB节点向所述IAB节点的 下一跳IAB节点发送信息，包括：The method according to claim 25, wherein the sending of information by the IAB node to the next hop IAB node of the IAB node comprises:
    在IAB节点检测到一个UE承载或回程无线链路控制信道BH RLC channel的buffer超出给定门限后，向所述下一跳IAB节点发送desired data rate，或desired data rate；After the IAB node detects that the buffer of a UE carried or the backhaul radio link control channel BH RLC channel exceeds a given threshold, it sends a desired data rate, or a desired data rate, to the next hop IAB node;
    或，所述IAB节点检测到对应的BH RLC channel的buffer size小于给定门限，向所述下一跳IAB节点发送流控停止指示；Or, the IAB node detects that the buffer size of the corresponding BH RLC channel is less than a given threshold, and sends a flow control stop instruction to the next-hop IAB node;
    或，所述IAB节点检测到对应的BH RLC channel的buffer size小于给定门限，将desired buffer size或desired data rate设置为最大允许值。Or, the IAB node detects that the buffer size of the corresponding BH RLC channel is smaller than a given threshold, and sets the desired buffer size or desired data rate to the maximum allowable value.
  27. 如权利要求17所述的方法，其中，所述信息包括：流控信息；The method according to claim 17, wherein the information comprises: flow control information;
    所述流控信息包括以下至少之一：UE承载或BH RLC承载的desired buffer size；UE承载或BH RLC承载的desired data rate。The flow control information includes at least one of the following: the desired buffer size of the UE bearer or BH RLC bearer; and the desired data rate of the UE bearer or BH RLC bearer.
  28. 如权利要求17所述的方法，其中，所述控制信息包括：流控信息；17. The method of claim 17, wherein the control information comprises: flow control information;
    所述流控信息包括以下至少之一：UE承载或BH RLC承载的desired buffer size；UE承载或BH RLC承载的desired data rate、终端标识信息。The flow control information includes at least one of the following: a desired buffer size carried by the UE or a BH RLC bearer; a desired data rate carried by the UE or a BH RLC bearer, and terminal identification information.
  29. 如权利要求17所述的方法，其中，所述控制信息包括：流控信息；17. The method of claim 17, wherein the control information comprises: flow control information;
    在所述IAB节点获知UE承载或BH RLC承载传输的下行数据在与所述UE映射的BH RLC承载或BH RLC承载映射的BH RLC承载整体传输数据量的比例的情况下，所述流控信息包括desired buffer size与传输数据量的比例的商，或desired data rate与desired data rate的商。In the case where the IAB node knows the proportion of the total transmission data volume of the downlink data carried by the UE or the BH RLC bearer mapped to the BH RLC bearer or BH RLC bearer mapped to the UE, the flow control information It includes the quotient of the ratio of the desired buffer size to the amount of data transmitted, or the quotient of the desired data rate and the desired data rate.
  30. 如权利要求17所述的方法，其中，所述信息包括：流控信息；The method according to claim 17, wherein the information comprises: flow control information;
    所述流控信息包括所有映射到BH RLC承载的UE承载的desired buffer size或desired data rate之和。The flow control information includes the sum of the desired buffer size or desired data rate of all UEs that are mapped to the BH RLC bearer.
  31. 一种自接入回传链路IAB，包括处理器、存储器及通信总线，其中：A self-access backhaul link IAB, including a processor, a memory, and a communication bus, in which:
    所述通信总线设置为实现所述处理器和所述存储器之间的连接通信；The communication bus is configured to realize connection and communication between the processor and the memory;
    所述处理器设置为执行所述存储器中存储的至少一个计算机程序，以实现如权利要求1-5任一项所述的IAB网络中控制信息处理方法；The processor is configured to execute at least one computer program stored in the memory, so as to implement the control information processing method in an IAB network according to any one of claims 1-5;
    或，or,
    以实现如权利要求6-9任一项所述的IAB网络中控制信息处理方法；To realize the control information processing method in the IAB network according to any one of claims 6-9;
    或，以实现如权利要求10-16任一项所述的IAB网络中控制信息处理方法；Or, to realize the control information processing method in the IAB network according to any one of claims 10-16;
    或，以实现如权利要求17-30任一项所述的IAB网络中控制信息处理方法。Or, to realize the control information processing method in the IAB network according to any one of claims 17-30.
  32. 一种计算机可读存储介质，存储有至少一个程序，所述至少一个程序可被至少一个处理器执行，以实现如权利要求1-5任一项所述的自接入回传链路IAB网络中控制信息处理方法；A computer-readable storage medium storing at least one program, and the at least one program can be executed by at least one processor to realize the self-access backhaul link IAB network according to any one of claims 1-5 Control information processing method;
    或，or,
    以实现如权利要求6-9任一项所述的IAB网络中控制信息处理方法；To realize the control information processing method in the IAB network according to any one of claims 6-9;
    或，以实现如权利要求10-16任一项所述的IAB网络中控制信息处理方法；Or, to realize the control information processing method in the IAB network according to any one of claims 10-16;
    或，以实现如权利要求17-30任一项所述的IAB网络中控制信息处理方法。Or, to realize the control information processing method in the IAB network according to any one of claims 17-30.
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