CN110351109B - Topology information management method, device, system, storage medium and electronic device - Google Patents

Topology information management method, device, system, storage medium and electronic device Download PDF

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CN110351109B
CN110351109B CN201810301935.1A CN201810301935A CN110351109B CN 110351109 B CN110351109 B CN 110351109B CN 201810301935 A CN201810301935 A CN 201810301935A CN 110351109 B CN110351109 B CN 110351109B
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iab node
topology management
information
topology
iab
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CN110351109A (en
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邹伟
陈琳
黄莹
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies

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Abstract

The invention provides a method, a device, a system, a storage medium and an electronic device for managing topology information, wherein the method comprises the following steps: receiving a topology management message; and adjusting the wireless connection of the local first integrated access backhaul node according to the topology management message. The invention solves the technical problem that the IAB node in the related technology can not effectively maintain the topological structure of the IAB network.

Description

Topology information management method, device, system, storage medium and electronic device
Technical Field
The present invention relates to the field of communications, and in particular, to a method, an apparatus, a system, a storage medium, and an electronic apparatus for managing topology information.
Background
In the process of implementing the technical scheme implemented by the application, the inventor of the application at least finds that the following technical problems exist in the related art:
the fifth Generation mobile communication technology (5G, 5th Generation) under study by 3GPP will achieve greater throughput, more user connections, lower latency, higher reliability, and lower power consumption (including network side devices and user terminals). In the discussion of 3GPP, Integrated Access and Backhaul (IAB) technology has been established as a new research project, aiming at: one or more IAB nodes can be used as the UE of the parent node to be connected to the parent node through the local access resource, and on the basis, a multi-hop wireless self-backhaul network is formed to provide backhaul connection for the local access UE of the IAB nodes.
In a 5G UDN deployment scenario, the applicability of different backhaul technologies needs to be considered. For wired backhaul, in a scenario where a large number of TPs are densely deployed (e.g., dense blocks), the cost of wired backhaul may be unacceptably high in consideration of the deployment or lease cost of cables or optical fibers, the site selection and maintenance cost, and the like. Even if wired backhaul is laid, due to the fact that the number of users served by each node is small and load fluctuation is large in a dense deployment scene, or due to energy-saving/interference control, some nodes can be dynamically opened or closed, a backhaul link is in an idle state in many times, and the fluctuation range of resource requirements of the backhaul link can be increased by using a content prediction and cache technology, so that the use efficiency of wired backhaul is low, and investment cost is wasted. For microwave backhaul, there are also disadvantages of increasing hardware cost, increasing additional spectrum cost (if an unauthorized spectrum is used, transmission quality cannot be guaranteed), relatively low antenna height of a transmission node, and easy shielding of microwaves, which results in severe fluctuation of backhaul link quality.
The wireless self-return technology is one of the important technical choices for avoiding the problems and reducing CAPEX. The self-return technology means that the return link and the access link use the same wireless transmission technology, share the same frequency band, and multiplex resources in a time division or frequency division mode. The use of self-backhauling techniques in ultra-dense networks has the following advantages:
wired connection is not needed, flexible transmission node deployment without planning or semi-planning is supported, and deployment cost is effectively reduced;
sharing frequency spectrum and wireless transmission technology with an access link, and reducing the cost of frequency spectrum and hardware;
through the joint optimization of the access link and the return link, the system can adaptively adjust the resource allocation proportion according to the network load condition, and the resource use efficiency is improved;
due to the use of the authorized spectrum, the quality of the wireless self-return link can be effectively ensured through the joint optimization of the authorized spectrum and the access link, and the transmission reliability is greatly improved.
The self-return technology is adopted in the UDN (Ultra-Dense Network) Network, and the main enhancement requirements are the improvement of link capacity and flexible resource allocation and path selection, so the main research direction includes the link enhancement of the return link and the joint optimization of the access link and the return link.
In addition, the wireless self-backhaul technology can also be used in a scenario where the deployment cost of the wired connection is high.
Five relay architectures are mentioned in the WA for IAB Architecture for L2/3relay (R3-181502) of the RAN3#99 conference. Wherein, the architecture 1a) is to relay the traffic flow by adding a DU with self-backhaul function on the basis of CU (Centralized Unit)/DU (Distributed Unit) separation. Fig. 1 is a schematic diagram of a 3GPP reference relay architecture 1a in the related art of the present invention, and as shown in fig. 1, an IAB Node (IAB Node) serves as a DU to provide access service for local UEs, and each IAB Node is connected to a parent Node at the previous stage through a local user terminal (MT). The MT shares access bandwidth as an access user of the parent node and other Users (UEs) of the parent node. Since the DU and CU are connected via F1 interface, a one-hop or multi-hop data bearer needs to be established between the DU of IAB node and CU of IAB Donor to transmit F1 message. At each hop, the data bearer is again data transmitted over the wireless NR Uu bearer between the MT and the DU. Therefore, for a multi-hop F1 bearer, the intermediate IAB node needs to forward the received F1 message. This forwarding process may be implemented by the IP layer or the Adapt layer at the intermediate node. Specifically, the IP layer or the Adapt layer may forward the packet to the next connection according to the destination address (e.g. destination IAB Node ID) or other information of the received packet. An IAB Donor is a node with a wired connection that may contain one DU and one CU, the Donor base station also called parent base station.
Fig. 2 is a schematic diagram of a specific protocol stack architecture for implementing forwarding by an Adapt layer of an intermediate node in the architecture of the related art of the present invention. SDAP (service data adaptation protocol) is a newly added protocol layer in 5G, and an adaptation layer (Adapt layer) is required to be added in each IAB node to realize the transmission, reception and forwarding of F1 interface data.
In summary, an IAB node is a node in the IAB network that provides remote access using a self-backhauled connection. The IAB Donor base station refers to a node with wired core network connection in an IAB network, and other IAB nodes are accessed to the core network through the Donor base station.
In a multi-hop IAB network, the topology of the IAB network may change at any time due to changes in the wireless links. How to efficiently maintain the topology is a problem that the wireless IAB network must solve.
In view of the above problems in the related art, no effective solution has been found at present.
Disclosure of Invention
The embodiment of the invention provides a method, a device, a system, a storage medium and an electronic device for managing topology information.
According to an embodiment of the present invention, there is provided a method for managing topology information, including: receiving a topology management message; and adjusting the wireless connection of the local first integrated access backhaul node according to the topology management message.
According to another embodiment of the present invention, there is provided a management apparatus of topology information, including: a receiving module, configured to receive a topology management message; and the adjusting module is used for adjusting the wireless connection of the local first integrated access backhaul node according to the topology management message.
According to another embodiment of the present invention, there is provided a management system of topology information, including: a first IAB node, a second IAB node, a donor base station, and a core network, wherein the first IAB node comprises: a receiving module, configured to receive a topology management message; and the adjusting module is used for adjusting the wireless connection of the local first integrated access backhaul node according to the topology management message.
According to a further embodiment of the present invention, there is also provided a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.
According to the invention, the IAB node adjusts the local wireless connection according to the topology management message, thereby solving the technical problem that the IAB node in the related technology can not effectively maintain the topology structure of the IAB network.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic diagram of a 3GPP reference relay architecture 1a in the related art of the present invention;
fig. 2 is a schematic diagram of a specific protocol stack architecture for implementing forwarding by an Adapt layer of an intermediate node in the architecture of the related art of the present invention;
fig. 3 is a flowchart of a management method of topology information according to an embodiment of the present invention;
fig. 4 is a block diagram of a configuration of a management apparatus of topology information according to an embodiment of the present invention;
fig. 5 is a block diagram of a topology information management system according to an embodiment of the present invention;
fig. 6 is a relay architecture embodiment in which a topology management entity provided by the present invention is located in an IAB node and a core network;
fig. 7 is a relay architecture embodiment of an OAM entity in an IAB node and a core network of a topology management entity provided by the present invention;
fig. 8 is a relay architecture embodiment in which topology management entities are located in an IAB node and a Donor base station according to the present invention;
fig. 9 is a functional block diagram embodiment of an IAB node with a topology management entity above an adaptation layer provided by the present invention;
fig. 10 is a functional block diagram embodiment of an IAB node with a topology management entity located in an adaptation layer provided by the present invention;
fig. 11 is a functional block diagram of an IAB donor base station with a topology management entity located in an adaptation layer according to an embodiment of the present invention;
fig. 12 is a functional block diagram of an IAB donor base station with a topology management entity above an adaptation layer according to an embodiment of the present invention;
fig. 13 is a functional block diagram of an IAB Donor base station with a topology management entity located at the upper layer of the CU function according to an embodiment of the present invention;
fig. 14 is a functional block diagram of an IAB Donor base station with a topology management entity located at the upper layer of the RRC function in a CU according to an embodiment of the present invention;
fig. 15 is a functional block diagram of an IAB Donor base station with a topology management entity located inside an RRC function in a CU according to an embodiment of the present invention;
fig. 16 is an embodiment of topology management messages exchanged between topology management entities provided by the present invention.
Fig. 17 is a schematic diagram of centralized topology management according to an embodiment of the present invention.
FIG. 18 is a schematic diagram of an embodiment of distributed topology management provided by the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Example 1
The embodiment of the present application may operate on the network architecture shown in fig. 1, as shown in fig. 1, the network architecture includes: an IAB Node (IAB Node), a Donor base station (IAB Donor), and a core Network (NGC). The IAB nodes (IAB nodes) are used as a DU to provide access service for local UE, and each IAB Node is connected with the parent Node of the previous stage through a local user terminal (MT). The MT shares access bandwidth as an access user of the parent node and other Users (UEs) of the parent node. Since the DU and CU are connected via F1 interface, a one-hop or multi-hop data bearer needs to be established between the DU of IAB node and CU of IAB Donor to transmit F1 message. At each hop, the data bearer is again data transmitted over the wireless NR Uu bearer between the MT and the DU. Therefore, for a multi-hop F1 bearer, the intermediate IAB node needs to forward the received F1 message. This forwarding process may be implemented by the IP layer or the Adapt layer at the intermediate node. Specifically, the IP layer or the Adapt layer may forward the packet to the next connection according to the destination address (e.g. destination IAB Node ID) or other information of the received packet. An IAB Donor is a node with a wired connection that may contain one DU and one CU.
In this embodiment, a method for managing topology information operating in the network architecture is provided, and fig. 3 is a flowchart of a method for managing topology information according to an embodiment of the present invention, as shown in fig. 3, the flowchart includes the following steps:
step S302, receiving a topology management message;
step S304, the wireless connection of the local first integrated access backhaul node is adjusted according to the topology management message.
Through the steps, the IAB node adjusts the local wireless connection according to the topology management message, and the technical problem that the IAB node in the related technology can not effectively maintain the topology structure of the IAB network is solved.
On the side of the donor base station, the following steps are executed: monitoring access of a first integrated access backhaul IAB node to a network via a self-backhaul link, wherein the network comprises: a first IAB node, a donor base station and a core network; configuring a radio bearer for the first IAB node, wherein the radio bearer is used for communicating topology management messages for the first IAB node.
Through the steps, when the IAB node is accessed to the network through the self-feedback link, the wireless bearer is configured for the IAB node, so that the IAB node can interact with other network elements to perform topology updating of the IAB network, and the technical problem that the IAB node in the related technology cannot effectively maintain the topology structure of the IAB network is solved.
Optionally, the topology management message is from at least one of: a second IAB node, a Donor base station, a DU of the Donor base station, a CU of the Donor base station, a core network, and an amf (access and Mobility Management function) of the core network.
Optionally, before the first IAB node receives the topology management message, the method further comprises: establishing a connection for a first IAB node for communicating topology management messages, wherein the connection comprises at least one of: the method comprises the steps of data connection from a first IAB node to a core network, data connection from the first IAB node to an operation maintenance management OAM functional entity, Radio Resource Control (RRC) signaling connection from the first IAB node to a Donor base station, wireless data connection from the first IAB node to the Donor base station, wireless data connection established between the first IAB node and a second IAB node, F1AP (F1Application Protocol) connection established between the first IAB node and a CU of the Donor base station, NG-C (NG-Control Plane) connection established between the first IAB node and an AMF of the core network, Xn connection established between the first IAB node and a second IAB node, and Xn connection from the first IAB node to the Donor base station.
Optionally, the data connection of the IAB node to the core network includes at least one of: IP connection, GTP-U (GPRS tunneling protocol for user plane,GPRS Tunnelling Protocol-User Place).
Optionally, the wireless data connection established between the first IAB node and the second IAB node comprises one of: the radio link controls logical link linking handled by the RLC layer, and logical link linking handled by the RLC layer and the packet data convergence protocol PDCP layer.
Optionally, the first and second IAB nodes are neighboring IAB nodes.
Optionally, the scheme of this embodiment further includes: the first IAB node interacts topology management information with other network elements to perform topology control and management, and the topology control and management comprises one of the following steps:
a first functional entity positioned in a first IAB node and a second functional entity positioned in a donor base station use radio bearer interaction topology management messages;
a first functional entity positioned in a first IAB node and a third functional entity positioned in a core network use a radio bearer to interact topology management messages;
the first functional entity located in the first IAB node interacts with the fourth functional entity located in the second IAB node using radio bearer topology management messages.
Optionally, the first functional entity is located in an adaptation layer of the first IAB node, and/or the second functional entity is located in an RRC layer of the doror base station, and/or the second functional entity is located in a DU of the doror base station, and/or the second functional entity is located in a CU of the doror base station, and/or the third functional entity is located in a core network in an OAM or AMF functional entity, and/or the fourth functional entity is located in an adaptation layer of the second IAB node. Optionally, the second functional entity is located in an adaptation layer of a distribution unit DU of the donor base station.
Optionally, the topology management message carries at least one of the following information: destination node address information, source node address information, message length information, channel quality information of one or more wireless links, establishment information of one or more wireless links, removal information of one or more wireless links, activation information of one or more wireless links, information for setting one or more wireless links as a standby wireless link, subsequent transmission indication information of a message, subsequent transmission indication information of a wireless link information, geographical location information of a home-end IAB node, neighbor information (neighbor identifier and congestion status) of one or more home-end IAB nodes, measurement results of neighbors (such as carrier frequency, bandwidth, tai tracking Area identity), cp (cyclic prefix) length, uplink and downlink subframe configuration of a TDD (Time-division Duplex) cell, AMF list), PLMN (Public Land Mobile Network) of a neighbor, information of next topology control actions (e.g. set up or tear down a certain connection, enable a certain connection or set a certain connection as standby, etc.).
Optionally, the topology management message contains one or more of the following information fields: a source IAB node address, a target IAB node address, a subsequent transmission indication of a current message, a message length, a wireless link identifier, a wireless link state and a subsequent transmission indication of the wireless link state; the cell identification of the adjacent cell, the measurement result of the adjacent cell and the PLMN supported by the adjacent cell; information of next topology control action (such as establishing or removing a certain connection, starting a certain connection or setting a certain connection as a standby, etc.); wherein the radio link status comprises at least one of: the method comprises the following steps of setting the wireless link as standby, establishing the wireless link, removing the wireless link, starting the wireless link; the subsequent transmission indication of the radio link status is used to indicate whether the current radio link status requires subsequent transmission and the range of the subsequent transmission.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
Example 2
In this embodiment, a management apparatus and a management system for topology information are further provided, which are used to implement the foregoing embodiments and preferred embodiments, and are not described again after being described. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 4 is a block diagram of a topology information management apparatus according to an embodiment of the present invention, as shown in fig. 4, the apparatus including:
a receiving module 40, configured to receive a topology management message;
and an adjusting module 42, configured to adjust the wireless connection of the local first integrated access backhaul node according to the topology management message.
Fig. 5 is a block diagram of a topology information management system according to an embodiment of the present invention, as shown in fig. 5, including: a first IAB node 50, a donor base station 52, a core network 54, and a second IAB node 56, the first IAB node 50 comprising:
a receiving module 500, configured to receive a topology management message;
an adjusting module 502, configured to adjust a wireless connection of the local first integrated access backhaul node according to the topology management message.
Optionally, the donor base station 52 includes: a monitoring module 520, configured to monitor that the first integrated access backhaul IAB node accesses the network through the self-backhaul link, where the network includes: a first IAB node, a donor base station and a core network; a configuring module 522 configured to configure a radio bearer for the first IAB node, wherein the radio bearer is used for communicating the topology management message for the first IAB node.
Optionally, after configuring a radio bearer for the first IAB node, the first functional entity located in the first IAB node and the second functional entity located in the donor base station use a radio bearer interaction topology management message; or, after configuring the radio bearer for the first IAB node, the first functional entity located in the first IAB node and the third functional entity located in the core network use the radio bearer to exchange topology management messages; or, the first functional entity located in the first IAB node and the fourth functional entity located in the second IAB node use the radio bearer interaction topology management message.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
Example 3
The present embodiment is used to explain the scheme of the present application in detail with reference to the specific embodiments:
in a multi-hop IAB network, the topology of the IAB network may change at any time due to changes in the wireless links. How to efficiently maintain the topology is the solution gist of the present embodiment.
When the IAB node accesses the network through the self-backhaul link, the Donor base station should configure a corresponding one-hop or multi-hop radio bearer for it to deliver topology management related messages. And the functional entity responsible for managing the topology uses the bearer to perform interaction of topology management messages and updates local topology information and/or routing information according to the information in the messages. Alternatively, the topology management message may be a control PDU (protocol data unit) of the adaptation layer or a control PDU newly extended by the RLC (radio link control) layer.
Optionally, the bearer may be a certain bearer as follows: the data connection from the IAB node to the core network can be IP connection or GTP-U connection; data connection from the IAB node to the OAM functional entity; RRC signaling connection from the IAB node to the doror base station; wireless data connection from the IAB node to the donor base station; a wireless data connection established between two IAB nodes.
The two radio data connections established between the two IAB nodes may be logical link links processed only by RLC, or corresponding PDCP layer processing may be extended for the two IAB nodes. The IAB node may implement the data bearer through the user equipment MT connected thereto. Optionally, the two IAB nodes at both ends of the bearer may be two adjacent IAB nodes.
Optionally, the functional entity of the IAB node may collect information related to the local topology, and send the information to the topology management entity of the opposite end through the bearer. Optionally, the local topology related information may be one or more of the following: the geographical location information of the node, the detected neighboring cell information (specifically including cell identifier, measurement result, PLMN, etc.), and the radio link status update information of the node, including the channel quality of each link, newly established links, failed links, enabled links, set as standby links, etc.
Optionally, the topology management functional entity of the IAB node may also receive topology control information from the opposite end topology management entity, and perform a corresponding topology control action. Alternatively, the topology control action may be connection establishment or tear down, enabling or setting to standby, etc.
Optionally, the topology management functional entity may also update the local topology structure according to the received information. Optionally, the topology structure may be a topology structure reflecting the overall situation of the IAB network, or a topology structure reflecting only part of the IAB network connections; optionally, the topology management functional entity may further send topology management information to instruct a topology management entity of an opposite end to perform a certain topology control action.
Optionally, the two ends of the bearer are functional entities responsible for topology management, and are located in the IAB node and the doror base station or the IAB node and the core network, respectively. Optionally, the functional entity responsible for topology management of the IAB node may be located in an adaptation layer of the IAB node. Optionally, the functional entity of the Donor base station responsible for topology management may be located in the RRC functional entity of the Donor base station; optionally, the functional entity responsible for topology management of the Donor base station may be located in a DU of the Donor base station; alternatively, the functional entity responsible for topology management of the Donor base station may be an adaptation layer of a DU of the Donor base station. Optionally, the functional entity responsible for topology management of the core network may be located in the OAM functional entity.
Optionally, the topology management related message may include one or more of the following information: target node address information, source node address information, message length information, channel quality information of one or more wireless links, establishment information of one or more wireless links, removal information of one or more wireless links, activation information of one or more wireless links, information for setting one or more wireless links as standby, subsequent transmission indication information of message or wireless link information, neighbor cell information (specifically including cell identifier, measurement result, PLMN, etc.), topology control action information, such as connection establishment or removal, activation or setting as standby, etc.
Optionally, the format of the topology management related message may include one or more of the following information fields: a source IAB node address, a target IAB node address, a subsequent transmission indication of the message, a length, a radio link identifier, a radio link status, a subsequent transmission indication of the radio link status, a neighbor cell information list, specifically a cell identifier including one or more neighbor cells, a cell measurement result, a PLMN supported by the cell, and the like.
The IAB node address is used to identify different nodes in the IAB network, and the identification may be uniformly allocated by the network, or may be an ID of the IAB node, or an ID of a DU in the IAB node, or an ID of a Donor base station. The radio link identifiers are used for identifying different radio links in the IAB network, and the identifiers may be uniformly allocated by the network, or may be generated in some manner according to the ID of the user equipment connected to the IAB node and the logical link ID thereof. The radio link status may include one or more of channel quality of the radio link, establishment, teardown, activation, and provisioning of the radio link, and the like. The radio link state subsequent transmission indication may indicate whether the radio link state requires subsequent transmission and information such as a range of the subsequent transmission in the distributed topology management. The radio link related information field may constitute a radio link information element. One or more radio link information elements may be contained in a single topology management message. The length information field is used for indicating the length of the topology management message; optionally, the length information field may indicate the number of subsequent radio link information units. Optionally, a uniform subsequent transmission indication may be provided for all the wireless links in a certain topology management message; in this case, each message may have a subsequent transmission indication field of the message indicating it.
Fig. 6 is an embodiment of a relay architecture in which a topology management entity provided by the present invention is located in an IAB node and a core network. There is a Topology management (Topology Mgmt) entity in each IAB node and core network, which are connected via one or more hop bearers. The bearer is a data connection from the IAB node to the OAM management entity and may be an IP connection or a GTP-U connection. The topology management entity carries out interaction of topology management messages through the load, and updates local topology information and/or routing information according to the information in the messages.
Fig. 7 is an embodiment of a relay architecture of an OAM entity located in an IAB node and a core network according to the topology management entity provided in the present invention. Each IAB node and OAM entity in the core network has a topology management entity, which are connected via a one-hop or multi-hop bearer. The bearer is a data connection from the IAB node to the Donor base station, which may be an IP connection or a GTP-U connection. The topology management entity carries out interaction of topology management messages through the load, and updates local topology information and/or routing information according to the information in the messages.
Fig. 8 is an embodiment of a relay architecture in which topology management entities are located in an IAB node and a Donor base station. There is a topology management entity in each IAB node and the Donor base station, which are connected via a one-hop or multi-hop bearer. The bearer is data connection from the IAB node to the Donor base station, and may be dedicated data connection, RRC signaling connection, IP connection, GTP-U connection, or connection established between a DU of the IAB node and a DU of the Donor base station. The topology management entity carries out interaction of topology management messages through the load, and updates local topology information and/or routing information according to the information in the messages.
Fig. 9 is a functional block diagram embodiment of an IAB node with a topology management entity above an adaptation layer provided in the present invention. The topology management entity is located above an adaptation layer (Adapt layer) functional entity, and the adaptation layer reports the topology management information to the topology management entity after receiving the topology management information. The topology management messages may come from local DUs or from user terminals (MTs) used to implement self-backhauling.
Fig. 10 is a functional block diagram embodiment of an IAB node with a topology management entity located in an adaptation layer provided in the present invention. The topology management entity is located in the adaptation layer (Adapt layer) functional entity, and directly processes the received topology management message as a part of the adaptation layer. The topology management messages may come from local DUs or from the user terminals used to implement the self-backhauling.
Fig. 11 is a functional block diagram embodiment of an IAB donor base station with a topology management entity located in an adaptation layer according to the present invention. The topology management entity is located in the adaptation layer (Adapt layer) functional entity, and directly processes the received topology management message as a part of the adaptation layer. The topology management messages may come from local DUs.
Fig. 12 is a functional block diagram of an embodiment of an IAB donor base station with a topology management entity above an adaptation layer according to the present invention. The topology management entity is located above an adaptation layer (Adapt layer) functional entity, and the adaptation layer reports the topology management information to the topology management entity after receiving the topology management information. The topology management messages may come from local DUs.
Fig. 13 is a functional block diagram of an IAB Donor base station with a topology management entity located at the upper layer of the CU function according to an embodiment of the present invention. The topology management entity is positioned above the CU functional entity, and the adaptation layer forwards the topology management message to the CU after receiving the topology management message and reports the topology management message to the topology management entity by the CU. The topology management messages may come from local DUs.
Fig. 14 is a functional block diagram embodiment of an IAB Donor base station with a topology management entity located at the upper layer of the RRC function in a CU according to the present invention. The topology management entity is located in the CU functional entity, the adaptation layer forwards the topology management message to the CU after receiving the topology management message, and the topology management message is identified by the RRC entity in the CU and then is forwarded to the topology management entity. The topology management messages may come from local DUs. Here, the RRC entity of the Donor base station needs to be able to recognize the topology management message carrying over the re-RR C connection and forward it to the topology management entity.
Fig. 15 is a functional block diagram of an IAB Donor base station in which a topology management entity is located inside an RRC function in a CU according to an embodiment of the present invention. The topology management entity is located in the RRC functional entity of the CU functional entity, and the adaptation layer forwards the topology management message to the CU after receiving the topology management message, and then the RRC entity in the CU identifies and receives the topology management message. The topology management entity directly processes the topology management message as part of the RRC. The topology management messages may come from local DUs. Here, the RRC entity of the Donor base station needs to be able to recognize the topology management message on the bearer re-RRC connection.
Fig. 16 is an embodiment of topology management messages exchanged between topology management entities provided by the present invention. The topology management related message may contain one or more of the following information: destination node address information, source node address information, message length information, channel quality information of one or more wireless links, establishment information of one or more wireless links, removal information of one or more wireless links, activation information of one or more wireless links, information for setting one or more wireless links as standby, and subsequent transmission indication information of messages or wireless link information.
Optionally, the format of the topology management related message may include one or more of the following information fields: source IAB node address, target IAB node address, subsequent transmission indication of the message, length, radio link identification, radio link status, subsequent transmission indication of radio link status.
The IAB node address is used to identify different nodes in the IAB network, and the identification may be uniformly allocated by the network, or may be an ID of the IAB node, or an ID of a DU in the IAB node, or an ID of a Donor base station. The radio link identifiers are used for identifying different radio links in the IAB network, and the identifiers may be uniformly allocated by the network, or may be generated in some manner according to the ID of the user equipment connected to the IAB node and the logical link ID thereof. The radio link status may include one or more of channel quality of the radio link, establishment, teardown, activation, and provisioning of the radio link, and the like. The radio link state subsequent transmission indication may indicate whether the radio link state requires subsequent transmission and information such as a range of the subsequent transmission in the distributed topology management. The radio link related information field may constitute a radio link information element. One or more radio link information elements may be contained in a single topology management message. The length information field is used for indicating the length of the topology management message; optionally, the length information field may indicate the number of subsequent radio link information units. Optionally, a uniform subsequent transmission indication may be provided for all the wireless links in a certain topology management message; in this case, each message may have a subsequent transmission indication field of the message indicating it.
Fig. 17 is a schematic diagram of centralized topology management according to an embodiment of the present invention. There is a centralized topology management entity to maintain the topology of the IAB network, which may be located in the IAB Donor base station, the DU of the Donor base station, the CU of the Donor base station, the core network, or the AMF of the core network. The specific centralized topology management may include the following steps:
step 1: the IAB node measures other IAB nodes/donors around, and then sends a topology management message to the centralized topology management entity to report various topology management information, which may specifically include: the geographical location of the IAB node, the current cell identity and congestion condition of the access, the measurement results of the neighbor (such as carrier frequency, bandwidth, TAI, CP length, uplink and downlink subframe configuration of the TDD cell, AMF list), the PLMN of the neighbor, etc. When the IAB node is initially started, after selecting an IAB node to access the network by the identity of the UE, the node may report the identity of its own IAB node, and interact with the centralized topology management entity under the control of the parent node or the core network AMF to report the above information.
Step 2: and the centralized topology management entity feeds back a topology management instruction to the IAB node through the topology management message according to the topology situation of the current network maintained by the centralized topology management entity. In particular, an appropriate parent IAB node/donor or nodes may be selected for an IAB node or instructed to establish a new connection.
And step 3: and the IAB node performs corresponding topology updating according to the topology management indication of the centralized topology management entity. It should be noted that the parent IAB node/donor configured by the centralized topology management entity may be different from the cell currently accessed by the IAB node. If not, the IAB node releases the connection with the previous cell and in turn establishes an RRC connection with the configured parent IAB node/donor.
FIG. 18 is a schematic diagram of an embodiment of distributed topology management provided by the present invention. Each node of the IAB network, including the IAB node and the IAB Donor base station, has a distributed topology management entity. The specific distributed topology management may include the following steps:
step 1: the IAB node measures other IAB nodes/donors around, and then sends a topology management message to a topology management entity of an adjacent node to report local topology management information, which may specifically include: the geographical location of the IAB node, the current cell identity and congestion condition of the access, the measurement results of the neighbor (such as carrier frequency, bandwidth, TAI, CP length, uplink and downlink subframe configuration of the TDD cell, AMF list), the PLMN of the neighbor, etc. When the IAB node is initially started, after selecting an IAB node to access the network by the identity of the UE, the node may report its own identity of the IAB node, interact with the distributed topology management entity of another node under the control of the parent node or the core network AMF, and report the above information.
Step 2: the distributed topology management entity of each node maintains the local network topology according to the received topology management information of the adjacent node, and feeds back the topology management indication to other IAB nodes through the topology management information. In particular, an appropriate parent IAB node/donor or nodes may be selected for other IAB nodes or instructed to establish a new connection.
And step 3: and the IAB node performs corresponding topology updating according to the topology management indication of the centralized topology management entity. It should be noted that the parent IAB node/donor configured by the topology management entity may be different from the cell currently accessed by the IAB node. If not, the IAB node releases the connection with the previous cell and in turn establishes an RRC connection with the configured parent IAB node/donor.
By adopting the scheme of the embodiment, the topology updating of the IAB network can be effectively carried out.
Example 4
Embodiments of the present invention also provide a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
Alternatively, in the present embodiment, the storage medium may be configured to store a computer program for executing the steps of:
s1, receiving topology management information;
s2, adjusting the wireless connection of the local first integrated access backhaul node according to the topology management message.
Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.
Optionally, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
Optionally, in this embodiment, the processor may be configured to execute the following steps by a computer program:
s1, receiving topology management information;
s2, adjusting the wireless connection of the local first integrated access backhaul node according to the topology management message.
Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.

Claims (15)

1. A method for managing topology information, comprising:
the first integrated access backhaul IAB node establishes a connection for transmitting topology management messages;
receiving the topology management message, wherein the topology management message comprises one or more of the following information fields: a source IAB node address, a target IAB node address, a subsequent transmission indication of a current message, a message length, a wireless link identifier, a wireless link state and a subsequent transmission indication of the wireless link state; the cell identification of the adjacent cell, the measurement result of the adjacent cell and the PLMN supported by the adjacent cell; next step topology control action information; wherein the radio link status comprises at least one of: establishing a wireless link, dismantling the wireless link, starting the wireless link, and setting the wireless link as a standby; the subsequent transmission indication of the radio link state is used for indicating whether the current radio link state needs subsequent transmission and the range of the subsequent transmission;
and adjusting the wireless connection of the first integrated access backhaul IAB node according to the topology management message.
2. The method of claim 1, wherein the topology management message is from at least one of: a second IAB node, a Donor base station, a distribution unit DU of the Donor base station, a central unit CU of the Donor base station, a core network, and an access and mobility management function AMF of the core network.
3. Method according to claim 1 or 2, wherein said connection for transferring topology management messages comprises at least one of:
the data connection between the first IAB node and the core network, the data connection between the first IAB node and the operation maintenance administration OAM function entity, the radio resource control RRC signaling connection between the first IAB node and the Donor base station, the radio data connection established between the first IAB node and the second IAB node, the F1AP connection established between the first IAB node and the CU of the Donor base station, the NG-C connection established between the first IAB node and the AMF of the core network, the Xn connection established between the first IAB node and the second IAB node, and the Xn connection between the first IAB node and the Donor base station.
4. The method of claim 3, wherein the IAB node-to-core network data connection comprises at least one of: IP connection and GTP-U connection.
5. The method of claim 3, wherein the wireless data connection established between the first IAB node and the second IAB node comprises one of: the radio link controls logical link linking handled by the RLC layer, and logical link linking handled by the RLC layer and the packet data convergence protocol PDCP layer.
6. The method of claim 3, wherein the first and second IAB nodes are neighboring IAB nodes.
7. The method of claim 1, further comprising one of:
a first functional entity positioned in the first IAB node and a second functional entity positioned in a doror base station use radio bearer to interact the topology management message;
the first functional entity positioned in the first IAB node and a third functional entity positioned in a core network use a radio bearer to interact the topology management message;
the first functional entity located in the first IAB node and the fourth functional entity located in the second IAB node use radio bearer to interact with the topology management message.
8. The method according to claim 7, wherein the first functional entity is located in an adaptation layer of the first IAB node, and/or wherein the second functional entity is located in an RRC layer of the Donor base station, and/or wherein the second functional entity is located in a DU of the Donor base station, and/or wherein the second functional entity is located in a CU of the Donor base station, and/or wherein the third functional entity is located in an OAM or AMF functional entity of the core network, and/or wherein the fourth functional entity is located in an adaptation layer of the second IAB node.
9. The method according to claim 8, wherein said second functional entity is located in the adaptation layer of the distribution unit, DU, of the donor base station.
10. The method of claim 1, wherein the topology management message carries at least one of the following information:
the method comprises the following steps of target node address information, source node address information, message length information, establishment information of one or more wireless links, dismantling information of one or more wireless links, starting information of one or more wireless links, information for setting one or more wireless links as standby wireless links, subsequent transmission indication information of messages, subsequent transmission indication information of wireless link information, geographical position information of an IAB (home agent node) of a home terminal, neighbor information of one or more IAB nodes of the home terminal, and information of next topology control action.
11. An apparatus for managing topology information, comprising:
a configuration module to configure a connection for transferring topology management messages;
a receiving module, configured to receive a topology management message, where the topology management message includes one or more of the following information fields: a source IAB node address, a target IAB node address, a subsequent transmission indication of a current message, a message length, a wireless link identifier, a wireless link state and a subsequent transmission indication of the wireless link state; the cell identification of the adjacent cell, the measurement result of the adjacent cell and the PLMN supported by the adjacent cell; next step topology control action information; wherein the radio link status comprises at least one of: establishing a wireless link, dismantling the wireless link, starting the wireless link, and setting the wireless link as a standby; the subsequent transmission indication of the radio link state is used for indicating whether the current radio link state needs subsequent transmission and the range of the subsequent transmission;
and the adjusting module is used for adjusting the wireless connection of the local first integrated access backhaul node according to the topology management message.
12. A management system of topology information, comprising: a first IAB node, a second IAB node, a donor base station, and a core network, wherein the first IAB node comprises:
a configuration module to configure a connection for transferring topology management messages;
a receiving module, configured to receive a topology management message, where the topology management message includes one or more of the following information fields: a source IAB node address, a target IAB node address, a subsequent transmission indication of a current message, a message length, a wireless link identifier, a wireless link state and a subsequent transmission indication of the wireless link state; the cell identification of the adjacent cell, the measurement result of the adjacent cell and the PLMN supported by the adjacent cell; next step topology control action information; wherein the radio link status comprises at least one of: establishing a wireless link, dismantling the wireless link, starting the wireless link, and setting the wireless link as a standby; the subsequent transmission indication of the radio link state is used for indicating whether the current radio link state needs subsequent transmission and the range of the subsequent transmission;
and the adjusting module is used for adjusting the wireless connection of the local first integrated access backhaul node according to the topology management message.
13. The system of claim 12,
after configuring a radio bearer for the first IAB node, a first functional entity located in the first IAB node and a second functional entity located in the donor base station use the radio bearer to interact with the topology management message; or the like, or, alternatively,
after configuring a radio bearer for the first IAB node, a first functional entity located in the first IAB node and a third functional entity located in the core network interact the topology management message using the radio bearer; or the like, or, alternatively,
the first functional entity located in the first IAB node and the fourth functional entity located in the second IAB node use the radio bearer to interact with the topology management message.
14. A computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to carry out the method of any one of claims 1 to 10 when executed.
15. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 1 to 10.
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