KR102289719B1 - Operation method of communication node supporting mobility in communication network - Google Patents

Abstract

A method of operating a communication node supporting mobility in a communication network is disclosed. A method of operating a communication node according to the present invention is a method of operating a first communication node for controlling a plurality of communication nodes included in a wireless X-Hall network supporting mobility, and includes a first communication node and a second communication node among the plurality of communication nodes. performing an attach procedure between communication nodes, establishing a path for communication between the second communication node and a third communication node on which the attach procedure is completed among the plurality of communication nodes, and a second communication node using the established path and supporting communication of the third communication node.

Description

OPERATION METHOD OF COMMUNICATION NODE SUPPORTING MOBILITY IN COMMUNICATION NETWORK

The present invention relates to a method of operating a communication node that supports mobility in a communication network, and more particularly, to a communication network in which a fronthaul, a midhaul, and a backhaul are integrated. It relates to an operation method of a supporting communication node.

The communication network is a core network (eg, mobility management entity (MME), serving gateway (SGW), packet data network (PGW) gateway), etc.), base station (eg, macro) base station , a small base station, a relay, etc.), a terminal, and the like. Communication between the base station and the terminal is performed by various radio access technologies (RATs) (eg, 4G communication technology, 5G communication technology, wireless broadband (WiBro) technology, wireless local area network (WLAN) technology, wireless personal area network (WPAN) technology). etc.) can be performed.

In a communication network, a base station may divide a function of a base station into a baseband unit (BBU) and a remote radio head (RRH) in a centralized RAN (C-RAN) structure. In this case, the BBU and the RRH of the base station may be connected through an interface such as a common public radio interface (CPRI), which is referred to as a fronthaul. In this way, when the function of the base station is divided, when the function of the base station is divided somewhere in the protocol layer below the CPRI upper and the packet data convergence protocol (PDCP) on the user plane, between the functions of the divided base station Defined as midhaul. In addition, the base station may be connected to the core network through a wired backhaul or a wireless backhaul. For example, the base station may transmit data and control information received from the terminal to the core network through a wired backhaul or a wireless backhaul. In addition, the base station may receive data, control information, and the like from the core network through a wired backhaul or a wireless backhaul.

In such a communication network, each dedicated transport network is used to perform communication through a fronthaul, a midhaul, and a backhaul. Accordingly, there is a problem in that a burden such as capital expenditures (CAPEX) and operating expenses (OPEX) increases by using a dedicated transmission network for each of the fronthaul, the midhaul, and the backhaul in the communication network. In addition, most of the transmission networks dedicated to fronthaul, midhaul, and backhaul in communication networks use wire-based transmission technology. There is a problem with receiving . In addition, some wireless-based transmission networks do not support the mobility of a communication network, so they cannot be used as a mobile wireless backhaul network for places with mobility, such as a train.

An object of the present invention for solving the above problems is to provide a method of operating a communication node supporting mobility in a communication network in which a fronthaul, a midhaul, and a backhaul are integrated.

A method of operating a communication node supporting mobility in a communication network according to an embodiment of the present invention for achieving the above object is a plurality of communication nodes included in a wireless xhaul network supporting mobility. A method of operating a first communication node for controlling Setting a path for communication between a third communication node on which an attach procedure has been completed among communication nodes and supporting communication between the second communication node and the third communication node using the set path include

Here, the first communication node has a function of managing mobility for the plurality of communication nodes, a function of managing a communication path for the plurality of communication nodes, and a resource for the plurality of communication nodes. It can perform management functions.

Here, when the attach procedure between the first communication node and the second communication node is completed, the first communication node changes the state of the second communication node from an unregistered state to a registered state. can be transferred to

Here, when the second communication node is in a registered state, the first communication node may allocate an identifier (ID) of the second communication node to the second communication node.

Here, in the wireless X-Hall network, the first communication node and the plurality of communication nodes may be connected through an H3 interface, and the plurality of communication nodes may be connected through an H2 interface.

Here, the first communication node may communicate with the plurality of communication nodes connected through the H3 interface based on an MXN H3 Control protocol (MH3C protocol).

Here, the second communication node may communicate with at least one communication node connected to the second communication node connected through the H2 interface based on an MXN H2 Control protocol (MH2C protocol).

A method of operating a communication node supporting mobility in a communication network according to another embodiment of the present invention for achieving the above object is a plurality of communication nodes included in a wireless xhaul network supporting mobility. A method of operating a first communication node among them, comprising: performing a discovery procedure for the plurality of communication nodes; a link between the first communication node and a second communication node discovered through the discovery procedure ), performing an attach procedure for a third communication node that controls the plurality of communication nodes in the wireless X-Hall network, among the first communication node and the plurality of communication nodes Establishing a path for communication between a fourth communication node on which an attach procedure is completed, and performing communication between the first communication node and the fourth communication node using the set path .

Here, the first communication node is a sector including a first ID (identifier) of the second communication node and a sector index for distinguishing a sector of the second communication node through the search procedure. ID can be obtained.

Here, the first communication node may further acquire a beam index of a beam for the second communication node through the discovery procedure.

Here, when the attach procedure between the first communication node and the third communication node is completed, the first communication node changes the state of the first communication node from an unregistered state to a registered state. can be transitioned

Here, the first communication node may be assigned a second ID of the first communication node by the third communication node when the state of the first communication node is the registered state.

Here, performing the communication of the first communication node is a step of confirming the quality of service (QoS) of data transmitted from the first communication node, the checked QoS and the forwarding preset by the third communication node determining the second communication node to which the data is transmitted among the plurality of communication nodes based on a forwarding table, generating a radio bearer for the determined second communication node, and the can create

Here, the first communication node is at least one connected to the third communication node based on an H3 interface in the wireless X-Hall network and connected to the first communication node based on an H2 interface. It can be connected to the communication node of

Here, the first communication node may communicate with the third communication node based on the MXN H3 Control protocol (MH3C protocol).

Here, the first communication node may communicate with the at least one communication node based on an MXN H2 Control protocol (MH2C protocol).

A communication node performing a method of operating a communication node supporting mobility in a communication network according to another embodiment of the present invention for achieving the above object is a wireless xhaul network supporting mobility. A first communication node for controlling a plurality of included communication nodes, comprising a processor and a memory in which at least one command executed through the processor is stored, wherein the at least one command is the first communication Performs an attach procedure between a node and a second communication node among the plurality of communication nodes, and for communication between the second communication node and a third communication node in which the attach procedure is completed among the plurality of communication nodes establishing a path, and supporting communication between the second communication node and the third communication node using the established path.

Here, the first communication node has a function of managing mobility for the plurality of communication nodes, a function of managing a communication path for the plurality of communication nodes, and a resource for the plurality of communication nodes. It can perform management functions.

Here, when the attach procedure between the first communication node and the second communication node is completed, the first communication node changes the state of the second communication node from an unregistered state to a registered state. can be transferred to

In the wireless X-hole network, the first communication node and the plurality of communication nodes may be connected through an H3 interface, and the plurality of communication nodes may be connected through an H2 interface.

According to the present invention, since the fronthaul, the midhaul, and the backhaul are integrated into one network in the communication network, the efficiency of communication performed in the communication network can be improved, and the management of a plurality of devices included in the communication network can be efficiently managed. It works.

In addition, in the method of operating a communication node supporting mobility in a communication network according to an embodiment of the present invention, the expenditure on CAPES and OPEX is significantly reduced compared to the case in which the fronthaul, the midhaul, and the backhaul are configured with each dedicated network. can be

In addition, by being able to easily support communication for a communication node having mobility in the communication network according to an embodiment of the present invention, there is an effect of providing flexibility and scalability for the communication network.

1 is a block diagram illustrating a communication node performing a method of operating a communication node supporting mobility in a communication network according to an embodiment of the present invention.
2 is a conceptual diagram illustrating the simplest communication network according to an embodiment of the present invention.
3 is a conceptual diagram illustrating a connection method for a topology of a communication network according to an embodiment of the present invention.
4 is a conceptual diagram illustrating a first embodiment of a topology of a communication network according to an embodiment of the present invention.
5 is a conceptual diagram illustrating a second embodiment of a topology of a communication network according to an embodiment of the present invention.
6 is a conceptual diagram illustrating an XCU of a communication network according to an embodiment of the present invention.
7 is a conceptual diagram illustrating an XDU of a communication network according to an embodiment of the present invention.
8 is a conceptual diagram illustrating a first embodiment of a state of an XDU in a communication network according to an embodiment of the present invention.
9 is a conceptual diagram illustrating a second embodiment of the state of an XDU in a communication network according to an embodiment of the present invention.
10 is a conceptual diagram illustrating a first embodiment of a communication network control plane protocol according to an embodiment of the present invention.
11 is a conceptual diagram illustrating a second embodiment of a communication network user plane protocol according to an embodiment of the present invention.
12 is a conceptual diagram illustrating a third embodiment of a protocol of a communication network according to an embodiment of the present invention.
13 is a conceptual diagram illustrating a fourth embodiment of a protocol of a communication network according to an embodiment of the present invention.
14 is a conceptual diagram illustrating a reference model of a communication network according to an embodiment of the present invention.
15 is a conceptual diagram illustrating an identifier used in a communication network according to an embodiment of the present invention.
16 is a conceptual diagram illustrating a method for generating a bearer in a communication network according to an embodiment of the present invention.
17 is a conceptual diagram illustrating a method of operating a communication node supporting mobility in a communication network according to an embodiment of the present invention.
18 is a flowchart illustrating a method of operating a communication node supporting mobility in a communication network according to an embodiment of the present invention.
19 is a flowchart illustrating a method of operating a communication node supporting mobility in a communication network according to another embodiment of the present invention.
20 is a flowchart illustrating a method of performing communication in a communication network according to another embodiment of the present invention.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In describing the present invention, in order to facilitate the overall understanding, the same reference numerals are used for the same components in the drawings, and duplicate descriptions of the same components are omitted.

1 is a block diagram illustrating a communication node performing a method of operating a communication node supporting mobility in a communication network according to an embodiment of the present invention.

Referring to FIG. 1 , a communication node 100 performing a method of operating a communication node supporting mobility in a communication network of the present invention is connected to at least one processor 110 , a memory 120 and a network to perform communication. It may include a transceiver (transceiver) (130). Also, the communication node 100 may further include an input interface device 140 , an output interface device 150 , a storage device 160 , and the like. Each of the components included in the communication node 100 may be connected by a bus 170 to communicate with each other.

The processor 110 may execute a program command stored in the memory 120 and/or the storage device 160 . The processor 110 may mean a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to the present invention are performed. The memory 120 and the storage device 160 may be configured of a volatile storage medium and/or a non-volatile storage medium. For example, the memory 120 may be configured as a read only memory (ROM) and/or a random access memory (RAM). Here, the program command executed through the processor 110 may include a plurality of steps of performing the method of operating a communication node supporting mobility in the communication network proposed by the present invention.

2 is a conceptual diagram illustrating the simplest communication network according to an embodiment of the present invention.

A communication network according to an embodiment of the present invention may mean a network in which a fronthaul, a midhaul, and a backhaul are integrated, which is an xhaul network or a wireless Xhaul network. (wireless xhaul network). In addition, the communication network of the present invention may be referred to as a mobile haul network (MXN) by supporting mobility.

Referring to FIG. 2 , a communication network according to an embodiment of the present invention may include an xhaul centralized unit (XCU) 210 and an xhaul distributed unit (XDU) 220 . The XCU 210 and the XDU 220 included in the communication network according to an embodiment of the present invention may have a structure similar to or the same as that of the communication node described with reference to FIG. 1 . Specifically, in a communication network, the XCU 210 may function to manage a topology of a mobile X-hole network and a path through which data is transmitted. In addition, the XCU 210 may perform a function for controlling a plurality of XDUs existing in the mobile X-hole network.

In addition, the XDU 220 may perform a function for wireless communication in a mobile X-hole network. For example, the XDU 220 may perform a function of transmitting or receiving data in a fronthaul, a midhaul, and a backhaul based on wireless communication in a mobile Xhaul network. Also, the XDU 220 may be divided into a fixed XDU and a mobile XDU. For example, the fixed XDU may mean an XDU that is installed at a predetermined location and does not move. In addition, the mobile XDU may refer to an XDU installed in a mobile means such as a train or a bus.

The XCU 210 and the XDU 220 included in the communication network according to an embodiment of the present invention may be connected through an H3 interface, and the XDU 220 includes a plurality of XDUs and H2 included in the communication network. It can be connected through an interface. For example, in a communication network, a plurality of XDUs may be connected based on the structure of the topology of the mobile X-hole network. A specific method in which a plurality of XDUs are connected in a communication network based on a topology structure of a mobile X-hole network may be described below with reference to FIGS. 3 to 5 .

3 is a conceptual diagram illustrating a connection method for a topology of a communication network according to an embodiment of the present invention.

Referring to FIG. 3 , a connection method for a topology of a communication network according to an embodiment of the present invention is an example of a network topology composed of XDUs having all six sectors. In a mobile X-hole network, which is a communication network according to an embodiment of the present invention, a plurality of XDUs may be connected to each other in various topologies based on the most basic atomic XDU connection method constituting the network topology shown in FIG. 3 . For example, a plurality of XDUs may be connected to each other based on a point-to-point (P2P) connection method, a multiple point-to-point (MP2P) connection method, and a point-to-multipoint (P2MP) connection method.

Specifically, according to the P2P connection method, the master sector (indicated by "M" in FIG. 3) in the mobile X-hole network can be connected to one slave sector (indicated by "S" in FIG. 3). there is. Also, according to the MP2P connection method, one XDU in a mobile X-hole network may be connected to each of a plurality of XDUs based on an independent P2P connection method. In addition, according to the P2MP connection method, one master sector is connected to different slave sectors in a mobile X-hole network, so that one XDU can be connected to a plurality of XDUs.

4 is a conceptual diagram illustrating a first embodiment of a topology of a communication network according to an embodiment of the present invention, and FIG. 5 shows a second embodiment of a topology of a communication network according to an embodiment of the present invention. It is a conceptual diagram.

4 and 5 , examples of topologies for a plurality of XDUs in a mobile X-hole network, which is a communication network according to an embodiment of the present invention, can be confirmed. First, as shown in FIG. 4 , in a mobile X-hole network, which is a communication network according to an embodiment of the present invention, a plurality of XDUs may be connected to each other based on a structure of a star topology. Also, as shown in FIG. 5 , in a mobile X-hole network, which is a communication network according to an embodiment of the present invention, a plurality of XDUs may be connected to each other based on a structure of a partial mesh topology.

4 and 5 , the master sector may be denoted by “M” and the slave sector may be denoted by “S”. A plurality of XDUs may be connected to each other in a mobile X-hole network, which is a communication network according to an embodiment of the present invention, based on the structure of the described topology.

All XDU operations according to an embodiment of the present invention are performed on a sector-by-sector basis. However, in the specification of the present invention, which will be described later, it is possible to describe in a sector-by-sector unit only when it is necessary to specifically distinguish a sector-unit function and operation. , and in all other cases, it may be described in units of XDU.

6 is a conceptual diagram illustrating an XCU of a communication network according to an embodiment of the present invention.

Referring to FIG. 6 , an XCU 600 of a mobile X-hole network, which is a communication network according to an embodiment of the present invention, may have a structure similar to or the same as that of a communication node described with reference to FIG. 1 . However, FIG. 6 may represent logical functional elements divided based on the operation performed in the XCU 600 of the mobile X-Hall network. That is, the XCU 600 of the mobile X-hole network may include a plurality of functional elements. Specifically, the XCU 600 is a plurality of functional elements, such as xhaul mobility management (xMM) 610, xhaul path management (xPM) 620, xhaul resource management (xRM) 630, xhaul control management (xCM). 640 and an xhaul topology database (xTD) 650 .

The xMM 610 included in the XCU 600 of the mobile X-hole network may perform a function of managing mobility of the mobile X-hole network. For example, the xMM 610 may perform a function of supporting handover for a moving XDU. Specifically, the xMM 610 may generate a measurement XDU sector list to be measured in order to determine the target XDU of the handover. In this case, the measurement XDU sector list generated by the xMM 610 may include a plurality of parameters related to a measurement target XDU, a measurement report period, and conditions of an event for measurement report.

Also, the xMM 610 may determine a candidate XDU sector corresponding to the candidate XDU sector based on the generated measured XDU sector list, and may determine a target XDU sector for handover based on the candidate XDU sector. Also, the xMM 610 may determine whether to perform data forwarding and redundant transmission for handover. Also, the xMM 610 may determine whether to perform the handover operation. In this case, the xMM 610 may request a request related to a path according to the handover (eg, a path update) to the xPM 620 .

The xPM 620 included in the XCU 600 of the mobile X-hole network may perform a function of managing a path of the mobile X-hole network. For example, the xPM 620 may perform a function of calculating, setting, changing, and deleting the path of the mobile X-hole network. Specifically, the xPM 620 may manage a forwarding table generated for data transmission of the XDU. Also, the xPM 620 may manage a topology table including information on the topology of the XCU 600 . Also, the xPM 620 may perform a function of managing a backup path in the mobile X-hole network. For example, the xPM 620 may manage a path for redundant transmission in the mobile X-Hall network, and may set matters related to switching of the path. In this case, when information on the topology is changed or information on a path is changed, the xPM 620 may transmit information on the changed topology or information on the changed path to the xTD 650 .

The xRM 630 included in the XCU 600 of the mobile X-hole network allocates resources to ensure a QoS class between a source XDU (source XDU) and a destination XDU (destination XDU) in the process of transmitting the data of the XDU. It can perform management functions. Also, when the amount of resources used in the XDU increases, the xRM 630 may perform a function of controlling the load of the mobile X-hole network. In addition, the xRM 630 may perform a function of measuring an XDU for centralized resource management and a function of managing a report on the measured result. Also, the xRM 630 may perform an authentication function in relation to an attach procedure for the XDU. In this case, when the information on the route is changed, the xRM 630 may transmit the information on the changed route to the xPM 620 . In addition, the xRM 630 may transmit a result measured for resource management to the xTD 650 , and may receive information about an XDU context from the xTD 650 .

The xCM 640 included in the XCU 600 of the mobile X-hole network may perform a function of an interface with a communication node (eg, XDU, etc.) connected to the XCU 600 . For example, the xCM 640 may transmit a message (eg, an H3 interface message) received from a communication node connected to the XCU 600 to a functional element corresponding to the functional element. That is, when the received message is related to a function of managing mobility, the xCM 640 may forward the received message to the xMM 610 . Also, when the received message is related to a function for managing a path, the xCM 640 may forward the received message to the xPM 620 . Also, when the received message is related to a resource management function, the xCM 640 may forward the received message to the xRM 630 .

The xTD 650 included in the XCU 600 of the mobile X-hole network may store information according to each function performed in the XCU 600 . For example, the xTD 650 may store information on the topology of the mobile X-hole network based on the information on the XDU context and the XDU link. Also, the xTD 650 may store information on the end-to-end path of the mobile X-hole network generated in the course of managing the path.

7 is a conceptual diagram illustrating an XDU of a communication network according to an embodiment of the present invention.

Referring to FIG. 7 , an XDU 700 of a mobile X-hole network, which is a communication network according to an embodiment of the present invention, may have a structure similar to or the same as that of a communication node described with reference to FIG. 1 . However, FIG. 7 may represent logical functional elements divided based on the operation performed in the XDU 700 of the mobile X-hole network. That is, the XDU 700 of the mobile X-hole network may include a plurality of functional elements. Specifically, the XCU 700 is a plurality of functional elements, mobility management (mobility management) 710, interference management (interface management) 720, unified xhaul data transport (unified xhaul data transport) 730, resource management & scheduling (740), discovery and initial access (750), H2DRB setup (H2DRB setup) (760) and millimeter wave based radio transmission with mmWave ) (770).

The mobility management 710 included in the XDU 700 of the mobile X-hole network may perform a measurement operation for handover of the XDU 700 and report the measurement result. In addition, the mobility management 710 may perform triggering for handover of the XDU 700, and may perform a handover procedure accordingly.

In addition, when the XDU 700 is an XDU corresponding to the master sector, the interference management 720 included in the XDU 700 of the mobile X-hole network can set matters related to measurement of interference, and provides the interference management function. It is possible to transmit and receive a message related to interference control with the performing coordinator. Also, when the XDU 700 is an XDU corresponding to a slave sector, the interference management 720 may measure interference. Also, the interference management 720 may determine information related to control of coordination between XDUs.

In addition, the integrated X-hole data transmission 730 included in the XDU 700 of the mobile X-hole network may perform conversion to the integrated data transmission protocol of the mobile X-hole network. In addition, the integrated X-hole data transmission 730 may perform multi-hop transmission based on QoS of data. In addition, the integrated X-hole data transmission 730 may perform redundant transmission/reception and split transmission/reception of data.

In addition, the resource management and scheduling 740 included in the XDU 700 of the mobile X-hole network may perform a function related to measurement and reporting of the XDU in order to allocate resources for a link of the mobile X-hole network. In addition, the resource management and scheduling 740 may allocate resources for links of the mobile X-hole network. In addition, the resource management and scheduling 740 may perform a function related to measurement and reporting for the XCU for centralized resource management.

In addition, the discovery and initial access 750 included in the XDU 700 of the mobile X-hole network may transmit and receive a discovery signal in the discovery procedure of the XDU 700 . In addition, the discovery and initial access 750 may identify an XDU adjacent to the XDU 700 in the mobile X-hole network, and may establish a link to the identified XDU. In this case, the discovery and initial access 750 may manage information on the discovered or identified XDU.

In addition, the H2DRB establishment 760 included in the XDU 700 of the mobile X-hole network may establish (or create) a radio bearer between XDUs, and may change or release the established radio bearer. In addition, the millimeter wave-based wireless transmission 770 included in the XDU 700 of the mobile X-hole network is a millimeter wave-based wireless transmission for one XDU through multiple beams or multiple layers configured through multiple antennas. can be done In order to perform such a function, the millimeter wave-based wireless transmission 700 includes a plurality of functional elements (synchronization 771 , frequency band & duplex selection 772 ), beam forming ( beam forming 773 , HARQ 774 , modulation & channel coding 775 , link adaptation & measurement 776 and framing 777 . can

Hereinafter, a state of the XDU 700 that is changed according to whether a link is established and an attach state in a mobile X-hole network, which is a communication network according to an embodiment of the present invention, may be described in detail.

8 is a conceptual diagram illustrating a first embodiment of a state of an XDU in a communication network according to an embodiment of the present invention, and FIG. 9 is a second diagram illustrating a state of an XDU in a communication network according to an embodiment of the present invention. It is a conceptual diagram showing an embodiment.

8 and 9, in the communication network according to an embodiment of the present invention, the XDU is largely divided into an MXN H2 control (MH2C) state and an MXN H3 control (MH3C) state depending on whether a link is established or an attach state. can Specifically, FIG. 8 may show the state of the XDU related to the MH3C state of the XDU, and FIG. 9 may show the state of the XDU related to the MH2C state of the XDU.

First, as shown in FIG. 8 , when the attach procedure for the XCU is completed in the mobile X-hole network, the XDU may be in a “registered” state, which means that the attach procedure is completed and registered. As such, when the XDU is in the “registered” state, the XDU ID may be allocated from the XCU. On the other hand, in the mobile X-hole network, when a detach procedure is completed for the XCU, the XDU may be in a "deregistered" state indicating that the detach procedure is completed and thus not registered. That is, when the XDU is in a “deregistered” state, it may mean a state in which it is not attached to the mobile X-hole network.

In addition, as shown in FIG. 9 , when a link (eg, a radio link) is established with another XDU in a mobile X-hole network, an XDU may be in a “linked” state, which means that a link is established. On the other hand, when a link is released because an XDU and a link with another XDU are not established in the mobile X-hole network, the XDU may be in an "unlinked" state, which means that a link is not established. In such a mobile X-hole network, the state of an XDU may be shown in Table 1 below.

Meanwhile, in a mobile X-hole network, which is a communication network according to an embodiment of the present invention, each sector of an XDU may operate in one of master, slave, or idle mode. Specifically, the description of the operation mode of each sector of the XDU may be shown in Table 2 below.

In a mobile X-hole network, which is a communication network according to an embodiment of the present invention, each sector of an XDU may operate in one of the operation modes described in Table 2. Specifically, an XDU aggregator (XDU-A, XDU-aggregator) may mean an XDU matched with an XCU, and each sector of the aggregator can operate only in the master mode or idle mode among the operation modes of the XDU. and cannot operate in slave mode. In addition, when the XDU is a mobile XDU, each sector of the XDU can operate only in the slave mode or the idle mode, and cannot operate in the master mode.

Hereinafter, a plurality of embodiments of a protocol of a mobile X-hole network, which is a communication network according to an embodiment of the present invention, may be specifically described with reference to FIGS. 10 to 13 .

10 is a conceptual diagram illustrating a first embodiment of a communication network control plane protocol according to an embodiment of the present invention, and FIG. 11 is a second embodiment of a communication network user plane protocol according to an embodiment of the present invention. is a conceptual diagram showing 12 is a conceptual diagram illustrating a third embodiment of a protocol of a communication network according to an embodiment of the present invention, and FIG. 13 is a fourth embodiment of a protocol of a communication network according to an embodiment of the present invention. is a conceptual diagram showing

10 to 13, the protocol of the mobile X-hole network, which is a communication network according to an embodiment of the present invention, is basically a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access (MAC) layer. control) layer and a PHY (physical) layer.

First, referring to FIG. 10 , the structure of a protocol according to a control plane of a mobile X-hole network, which is a communication network according to an embodiment of the present invention, can be confirmed. Specifically, the protocol according to the control plane in the mobile X-hole network may further include an MH2C layer for control between XDUs and an MH3C layer for control between XDUs and XCUs. In addition, the protocol according to the control plane of the mobile Xhaul network may further include an xhaul tunneling protocol (XTP) layer for supporting communication between the XDU aggregator and the XCU through an internet protocol (IP) network.

For example, in the mobile X-hole network, the first XDU may have a protocol structure including an MH3C layer, an MH2C layer, a PDCP layer, an RLC layer, a MAC layer, and a PHY layer. In addition, the second XDU may have a protocol structure including an MH2C layer, a PDCP layer, an RLC layer, a MAC layer, and a PHY layer for communicating with the first XDU and the third XDU. In addition, the third XDU may have a protocol structure including an MH2C layer, a PDCP layer, an RLC layer, a MAC layer, and a PHY layer for communicating with the second XDU. In addition, the third XDU may have a protocol structure including an XTP layer, a stream control transmission protocol (SCTP) layer, an internet protocol (IP) layer, an L2 layer, and an L1 layer for communicating with the XCU. In addition, the XCU may have a protocol structure including an MH3C layer, an XTP layer, an SCTP layer, an IP layer, an L2 layer, and an L1 layer. As described above, in the mobile X-hole network, which is a communication network according to an embodiment of the present invention, a protocol structure according to a control plane may be a structure for transmitting control data having a relatively high reliability requirement.

In addition, referring to FIG. 11 , a protocol structure according to a user plane of a mobile X-hole network, which is a communication network according to an embodiment of the present invention, can be confirmed. Specifically, the protocol according to the user plane in the mobile X-hole network may further include a MUTP (MXN unified transport protocol) layer that performs a function for data forwarding to a higher layer. The MUTP layer may perform packet encapsulation and decapsulation functions for interworking the mobile X-hole network and the external network. In addition, the MUTP layer may be a protocol for a multi-hop-based data forwarding function in a mobile X-hole network.

For example, in the mobile X-hole network, the first XDU may have a protocol structure including a MUTP layer, an L2 layer, and an L1 layer. In addition, the first XDU may have a protocol structure including a MUTP layer, a PDCP layer, an RLC layer, a MAC layer, and a PHY layer for communicating with the second XDU. In addition, the second XDU may have a protocol structure including a MUTP layer, a PDCP layer, an RLC layer, a MAC layer, and a PHY layer for communicating with the first XDU and the third XDU. In addition, the third XDU may have a protocol structure including a MUTP layer, a PDCP layer, an RLC layer, a MAC layer, and a PHY layer for communicating with the second XDU. In addition, the third XDU may have a protocol structure including a MUTP layer, an L2 layer, and an L1 layer. As such, in the mobile X-hole network, which is a communication network according to an embodiment of the present invention, the protocol structure according to the user plane may be a structure for supporting various external interfaces.

12 and 13 , various types of external networks interworking based on a user plane of a mobile X-hole network, which is a communication network according to an embodiment of the present invention, may exist. Specifically, FIG. 12 shows an external interworking based on a user plane of a mobile Xhaul network in a backhaul structure that means communication between an eNB and a serving gateway (SGW) of an evolved packet core (EPC) through an XDU of the mobile Xhaul network. The network may be an IP network. For example, the eNB may have a protocol structure including a PDCP layer, an RLC layer, a MAC layer, and a PHY layer. In addition, the eNB may have a protocol structure including a GPRS tunneling protocol-user plane (GTP-U) layer, a user datagram protocol (UDP) layer, an IP layer, an L2 layer, and an L1 layer. In addition, the first XDU may have a protocol structure including a MUTP layer, an IP layer, an L2 layer, and an L1 layer. In addition, the first XDU may have a protocol structure including a MUTP layer, a PDCP layer, an RLC layer, a MAC layer, and a PHY layer. In addition, the second XDU may have a protocol structure including a MUTP layer PDCP layer, an RLC layer, a MAC layer, and a PHY layer for communicating with the first XDU and the third XDU. In addition, the third XDU may have a protocol structure including a MUTP layer, a PDCP layer, an RLC layer, a MAC layer, and a PHY layer. In addition, the third XDU may have a protocol structure including a MUTP layer, an IP layer, an L2 layer, and an L1 layer. In addition, the SGW may have a protocol structure including a GTP-U layer, a UDP layer, an IP layer, an L2 layer, and an L1 layer.

In addition, FIG. 13 is an interworking based on the user plane of the mobile X-hole network in the structure of a mid-hole, which means communication between a flexible transmission and reception point (f-TRP) and a cloud platform through the XDU of the mobile X-hole network. The external network to be used may be an Ethernet/IP type network.

For example, f-TRP includes the RAN-L layer (when dividing the entire protocol function of the base station into two layers, the layer including the lower protocol layer including the physical layer), the FS layer, the L2 layer, and the L1 layer It can have a protocol structure that In addition, the first XDU may have a protocol structure including a MUTP layer, a PDCP layer, an RLC layer MAC layer, and a PHY layer for communicating with the second XDU. In addition, the second XDU may have a protocol structure including a MUTP layer, a PDCP layer, an RLC layer MAC layer, and a PHY layer for communicating with the first XDU and the third XDU. In addition, the third XDU may have a protocol structure including a MUTP layer, a PDCP layer, an RLC layer MAC layer, and a PHY layer for communicating with the second XDU. In addition, the third XDU may have a protocol structure including a MUTP layer, an L2 layer, and an L1 layer. In addition, the cloud platform has a protocol structure including the RAN-H layer (when dividing the entire protocol function of the base station into two layers, the layer including the upper protocol layer including the PDCP layer), the FS layer, the L2 layer, and the L1 layer can have In addition, the cloud platform may have a protocol structure including a GTP-U layer, a UDP layer, an IP layer, an L2 layer, and an L1 layer.

14 is a conceptual diagram illustrating a reference model of a communication network according to an embodiment of the present invention.

Referring to FIG. 14 , a reference model of a mobile X-hole network, which is a communication network according to an embodiment of the present invention, may be identified. Specifically, the reference model of the mobile X-hole network may include an XCU 1410 , a first XDU 1420 , and a second XDU 1430 . In the mobile X-hole network, the XCU 1410 may be connected to each of the first XDU 1420 and the second XDU 1430 through an H3 interface. In addition, the first XDU 1410 may be connected to the XCU 1410 through an H3 interface, and may be connected to the second XDU 1430 through an H2 interface. In addition, the second XDU 1430 may be connected to the XCU 1410 through an H3 interface, and may be connected to the first XDU 1420 through an H2 interface.

That is, in the mobile X-hole network, the XCU 1410 may transmit and receive H3 interface messages with the first XDU 1420 and the second XDU 1430 based on the H3 interface. Also, in the mobile X-hole network, the first XDU 1420 and the second XDU 1430 may transmit and receive H2 interface messages to each other based on the H2 interface. Also, the first XDU 1420 and the second XDU 1430 may transmit/receive H3 interface messages to and from the XCU 1410 based on the H3 interface. Specifically, H2 interface messages transmitted and received based on the H2 interface in the mobile X-hole network may be shown in Table 3 below.

Table 3 may indicate H2 interface messages transmitted and received through the H2 interface in the mobile X-hole network. Referring to Table 3, the H2 interface message may transmit and receive messages defined according to procedures related to functions performed in XDU and XCU. Hereinafter, H3 interface messages transmitted/received based on the H3 interface in the mobile X-hole network may be represented as shown in Table 4 below.

Table 4 may indicate H3 interface messages transmitted and received through the H3 interface in the mobile X-hole network. Referring to Table 4, the H3 interface message may transmit and receive messages defined according to procedures related to functions performed in XDU and XCU.

15 is a conceptual diagram illustrating an identifier used in a communication network according to an embodiment of the present invention.

Referring to FIG. 15 , main identifiers used in a mobile X-hole network that is a communication network according to an embodiment of the present invention are a sector ID 1510 , a p-sector ID 1520 , and a beam index. (1530). In this case, the p-sector ID 1520 and the beam index 1530 in the mobile X-hole network may be obtained through a discovery procedure.

Specifically, the sector ID 1510 may include an XDU ID 1511 and a sector index 1512 , and may mean an identifier for identifying a sector in a mobile X-hole network. The XDU ID 1511 included in the sector ID 1510 may mean an identifier for identifying an XDU in a mobile X-hole network. In addition, the XDU ID 1511 may be obtained by being assigned from the XCU when the access procedure to the XCU is completed. In addition, when the XDU ID 1511 is defined as the sector ID 1510 together with the sector index 1512 , it may be used as a parameter for managing the path of the mobile X-hole network. Also, the sector index 1512 included in the sector ID 1510 may mean an identifier for identifying a sector in the XDU. In addition, when the sector index 1512 is defined as the sector ID 1510 together with the XDU ID 1511 , it may be used as a parameter for managing the path of the mobile X-hole network.

Also, the p-sector ID 1520 may include a local XDU ID 1521 and a sector index 1512 . Specifically, the local XDU ID 1521 may be the remainder of the sector information obtained through the search procedure, excluding the sector index 1512 and the beam index 1530 . The local XDU ID 1521 may mean an identifier for identifying an XDU in a discovery procedure. When the local XDU ID 1521 is defined as the p-sector ID 1520 together with the sector index, it may be used as a parameter for a scrambling or CRC masking procedure in a physical layer of the mobile X-hole network. For example, the p-sector ID 1520 of the master XDU may be used in a procedure for scrambling unicast data and scheduling information transmitted from the master XDU to the slave XDU. Also, the p-sector ID 1520 of the slave XDU may be used as a parameter for the CRC masking procedure. In addition, the local XDU ID 1521 may be included in the synchronization signal transmitted through the sector. Also, the beam index 1530 may mean an identifier for identifying a beam within a sector of the mobile X-hole network. In addition, the beam index 1530 may be used to distinguish a beam within one sector in a search procedure. In addition, the beam index 1530 is not included in the synchronization signal transmitted through the sector, but may be classified according to the beam in the search procedure based on information on the resource for beam sweeping according to the beam. .

16 is a conceptual diagram illustrating a method for generating a bearer in a communication network according to an embodiment of the present invention.

Referring to FIG. 16 , a bearer service structure of a mobile X-hole network, which is a communication network according to an embodiment of the present invention, can be confirmed. Specifically, the mobile X-hole network may include a first XDU 1610 , a second XDU 1620 , and a third XDU 1630 . The first XDU 1610 , the second XDU 1620 , and the third XDU 1630 included in the mobile X-hole network may establish a bearer in consideration of QoS characteristics of data. Specifically, the first XDU 1610 , the second XDU 1620 , and the third XDU 1630 of the mobile X-hole network are the first mobile X-hole network radio bearers that transmit packets in one-hop units. By configuring the mobile X-hole network forwarding bearer 1 based on the radio bearer 2-1 and the second radio bearer 2-2, the QoS characteristics between the first XDU 1610 and the third XDU 1630 are multi-hop transmission may be supported.

For example, in the mobile X-hole network, the first XDU 1610 performs multi-hop transmission of data to the third XDU 1630 through the mobile X-hole network forwarding bearer 1 based on the forwarding rule set by the XCU. can do. In addition, in the mobile X-hole network, the first XDU 1610 may map data to a QoS class in consideration of the QoS characteristics of the data, and based on the forwarding rule set by the XCU, the first radio bearer 2-1 Through this, data may be transmitted to the second XDU 1620 . In the same way, the second XDU 1620 may transmit data to the third XDU 1630 through the second radio bearer 2-2 in consideration of the QoS of the data.

Meanwhile, the QoS characteristics of the mobile X-hole network may be described below. Traffic related to data transmission of the mobile Xhaul network may include backhaul traffic (eg, S1-C, S1-U, X2-C, X2-U, OAM), midhaul traffic, and fronthaul traffic. Specifically, the fronthaul traffic may have a delay budget requirement of several hundreds of microseconds, and may be supported with a high bit error ratio (BER) and low jitter. Also, the QoS class of the midhaul traffic may be classified based on a radio bearer identifier (RBID) or a logical channel identifier (LCID) according to functional split. In addition, the backhaul traffic may be divided into a control packet and a data packet. When the backhaul traffic is a data packet, the QoS class of the backhaul traffic may be classified based on a differentiated services code point (DSCP) field of an ID header.

In addition, the mobile X-hole network can support 5G low-latency service based on QoS characteristics. In addition, the mobile X-hole network may support a requirement for priority as a QoS characteristic. For example, a control packet for midhaul traffic and backhaul traffic in a mobile Xhaul network may have a higher priority than a data packet. In addition, fronthaul traffic in a mobile X-haul network may have the lowest latency requirements. In addition, in the mobile X-haul network, midhaul traffic and backhaul traffic may be classified into grades (low/middle/high) according to service delay requirements, and priority may be determined based on the class of traffic. In addition, the rating for the priority according to the QoS characteristics of the mobile X-hole network may refer to Table 5 below.

17 is a conceptual diagram illustrating a method of operating a communication node supporting mobility in a communication network according to an embodiment of the present invention.

Referring to FIG. 17 , a method of operating a communication node supporting mobility in a communication network according to an embodiment of the present invention is based on a plurality of functional elements included in each of the XCU and XDU described with reference to FIGS. 6 and 7 . can be performed with Specifically, the mobile X-Hall network, which is a communication network according to an embodiment of the present invention shown in FIG. 17 , includes a first XDU 1710 , a second XDU 1720 , an XCU 1730 , a third XDU 1740 and A fourth XDU 1750 may be included.

In the mobile X-hole network, the first XDU 1710 and the second XDU 1720 may perform discovery and initial access 10 . For example, the first XDU 1710 may perform a discovery procedure for a plurality of XDUs included in the mobile X-hole network, and may discover the second XDU 1720 through this. Thereafter, the first XDU 1710 may perform initial radio transmission/reception for the discovered second XDU 1720 .

Thereafter, the first XDU 1710 and the second XDU 1720 may perform the link establishment procedure 20 . For example, the link establishment procedure 20 performed in the first XDU 1710 and the second XDU 1720 sets the MH2C protocol for performing communication between the first XDU 1710 and the second XDU 1720 . It could mean the procedure.

Thereafter, the first XDU 1710 may perform an attach procedure 30 for the XCU 1730 . That is, the attach procedure 30 performed between the first XDU 1710 and the XCU 1730 may mean a procedure in which the first XDU 1710 is registered in the mobile X-hole network. In this case, information on the first XDU 1710 may be registered in the XCU 1730, and an authentication procedure therefor may be performed. Also, the XCU 1730 may allocate an XDU ID for the first XDU 1710 .

Thereafter, in the mobile X-hole network, the XCU 1730 performs a route setting procedure 40 for the first XDU 1710 , the second XDU 1720 , and the third XDU 1740 included in the mobile X-hole network. can For example, the path setting procedure 40 performed in the XCU 1730 calculates a path for transmitting end-to-end data, and based on the calculated path, the first XDU 1710, the second XDU 1720 and It may refer to a procedure of setting a forwarding table for the third XDU 1740 . Thereafter, in the mobile X-hole network, the second XDU 1720 and the third XDU 1740 may perform an H2DRB setting procedure 50 - 1 . Also, the first XDU 1710 and the second XDU 1720 may perform an H2DRB setup procedure 50 - 2 . For example, the H2DRB establishment procedures 50-1 and 50-2 may refer to procedures for establishing a radio link bearer for transmitting data through a link between XDUs connected through an H2 interface. Thereafter, the first XDU 1710, the second XDU 1720, and the third XDU 1740 in the mobile X-hole network may perform the end-to-end transmission procedure 60 based on the radio link bearer corresponding to the established path. there is.

Meanwhile, in the mobile X-hole network, the XCU 1730 may perform the path setting procedure 70 of the fourth XDU 1750 . For example, the fourth XDU 1750 may mean a moving XDU that is mounted on a train and has mobility. Specifically, the XCU 1730 may set a backup path for handover of the fourth XDU 1750 or set a path to the target XDU sector 1770 . Thereafter, the XCU 1730 and the fourth XDU 1750 may perform a handover procedure 80 of the fourth XDU 1750 in the mobile X-hole network. For example, the XCU 1730 may change the active XDU sector 1760 to the target XDU sector 1770 while maintaining service continuity for the fourth XDU 1750 .

18 is a flowchart illustrating a method of operating a communication node supporting mobility in a communication network according to an embodiment of the present invention.

Referring to FIG. 18 , in a method of operating a communication node supporting mobility in a communication network according to an embodiment of the present invention, a plurality of communication nodes included in a wireless xhaul network supporting mobility It may be performed in the first communication node that controls them. Here, the first communication node may have a structure similar to or the same as that of the communication node described with reference to FIG. 1 . Also, the first communication node may be the XCU described with reference to FIGS. 2 to 17 . For example, the first communication node has a function of managing mobility for a plurality of communication nodes, a function of managing a path for communication of a plurality of communication nodes, and a function of managing resources for a plurality of communication nodes. can be done

First, the first communication node may perform an attach procedure between the first communication node and a second communication node among the plurality of communication nodes (S1810). Specifically, the attach procedure performed between the first communication node and the second communication node may refer to the attach procedure 30 described with reference to FIG. 17 . Here, the second communication node may be the XDU described with reference to FIGS. 2 to 17 . In this case, when the attach procedure between the first communication node and the second communication node is completed, the first communication node may transition the state of the second communication node from an unregistered state to a registered state. . In addition, when the second communication node is in the registered state, the first communication node may allocate the ID of the second communication node to the second communication node.

Thereafter, the first communication node may set a path for communication between the second communication node and a third communication node on which the attach procedure is completed among the plurality of communication nodes ( S1820 ). Specifically, the procedure for setting a path in the first communication node may refer to the path setting procedure 40 described with reference to FIG. 17 . For example, the first communication node may calculate a path for communication between the second communication node and the third communication node, and may set a forwarding table corresponding to the calculated path.

Thereafter, the first communication node may support communication between the second communication node and the third communication node using the set path ( S1830 ). Specifically, the procedure for supporting communication between the second communication node and the third communication node in the first communication node may refer to the end-to-end transmission procedure 60 described with reference to FIG. 17 . In addition, the first communication node may support communication between the second communication node and the third communication node by managing a path for transmitting data in the second communication node or managing resources for communication.

Meanwhile, in the wireless X-hole network, the first communication node and the plurality of communication nodes may be connected to each other through an H3 interface, and each of the plurality of communication nodes may be connected to each other through an H2 interface. That is, the first communication node may communicate with a plurality of communication nodes connected through the H3 interface based on the MH3C protocol. In addition, the second communication node may perform communication based on the MH2C protocol with the communication node connected through the H2 interface. Specifically, the wireless X-Hall network may have the same structure as the reference model described with reference to FIG. 14 .

19 is a flowchart illustrating a method of operating a communication node supporting mobility in a communication network according to another embodiment of the present invention.

Referring to FIG. 19 , a method of operating a communication node supporting mobility in a communication network according to another embodiment of the present invention is performed by a first communication node among a plurality of communication nodes included in a wireless X-Hall network supporting mobility can be

First, the first communication node may perform a search procedure for a plurality of communication nodes (S1910). Specifically, the first communication node may perform a search procedure for at least one communication node adjacent to the first communication node among the plurality of communication nodes. The discovery procedure performed in the first communication node may refer to the discovery and initial access procedure 10 described with reference to FIG. 17 . In this case, the first communication node may acquire the sector ID including the sector index for distinguishing the sector of the first ID of the second communication node and the sector of the second communication node through a search procedure. In addition, the first communication node may further obtain a beam index for the second communication node through a discovery procedure. The plurality of identifiers obtained through the discovery procedure in the first communication node may refer to the plurality of identifiers described with reference to FIG. 15 . Here, the second communication node may refer to the second XDU 1720 described with reference to FIG. 17 .

Thereafter, the first communication node may establish a link between the first communication node and the second communication node discovered through the discovery procedure (S1920). Specifically, the first communication node may discover the second communication node by searching for at least one communication node adjacent to the first communication node among the plurality of communication nodes. Thereafter, the first communication node may establish a link between the first communication node and the second communication node. The procedure for establishing a link between the first communication node and the second communication node in the first communication node may refer to the link establishment procedure 20 described with reference to FIG. 17 . That is, the second communication node may refer to the second XDU 1720 described with reference to FIG. 17 .

Thereafter, the first communication node may perform an attach procedure for the third communication node that controls the plurality of communication nodes in the wireless X-hole network (S1930). Specifically, the attach procedure performed in the first communication node may refer to the attach procedure 30 described with reference to FIG. 17 . Here, the third communication node may be the XCU described with reference to FIGS. 2 to 17 . In this case, when the attach procedure between the first communication node and the third communication node is completed, the third communication node may change the state of the first communication node from the unregistered state to the registered state. In addition, when the first communication node is in the registered state, the ID of the first communication node may be assigned to the first communication node by the third communication node.

Thereafter, the first communication node may set a path for communication between the first communication node and a fourth communication node on which the attach procedure is completed among the plurality of communication nodes ( S1940 ). Here, the fourth communication node may be the third XDU 1730 described with reference to FIG. 17 . Specifically, the procedure for setting a path in the first communication node may refer to the path setting procedure 40 described with reference to FIG. 17 . For example, the first communication node may obtain a forwarding table corresponding to a path calculated by the third communication node for communication between the first communication node and the fourth communication node.

Thereafter, the first communication node may perform communication between the first communication node and the fourth communication node using the set path (S1950). Specifically, the procedure in which the communication between the first communication node and the fourth communication node is performed in the first communication node may refer to the end-to-end transmission procedure 60 described with reference to FIG. 17 . For example, the first communication node may perform communication based on quality of service (QoS) of data transmitted from the first communication node. A specific method of performing communication in the first communication node may be described with reference to FIG. 20 below.

20 is a flowchart illustrating a method of performing communication in a communication network according to another embodiment of the present invention.

Referring to FIG. 20 , in a communication network according to another embodiment of the present invention, a first communication node may transmit data based on QoS of the data. Specifically, the first communication node may check the QoS of data transmitted from the first communication node (S1951). For example, the first communication node may check the QoS of data transmitted from the first communication node based on the QoS characteristics described with reference to FIG. 16 .

Thereafter, the first communication node may determine a second communication node to which data is transmitted among a plurality of communication nodes based on the checked QoS and a forwarding table preset by the third communication node ( S1952 ). That is, the third communication node may generate a forwarding table including information on a communication node for transmitting data in consideration of QoS of data, and may transmit the generated forwarding table to the first communication node. Accordingly, the first communication node may be in a state in which the forwarding table is stored in advance.

Thereafter, the first communication node may create a radio bearer for the determined second communication node (S1953). For example, the procedure for generating a radio bearer for the second communication node in the first communication node may refer to the H2DRB establishment procedures 50-1 and 50-2 described with reference to FIG. 17 . Thereafter, the first communication node may transmit data based on the generated radio bearer (S1954). Through this method, the first communication node performing the method of operating a communication node supporting mobility in a communication network according to another embodiment of the present invention may transmit data based on the QoS of the data.

Meanwhile, referring back to FIG. 19 , in the wireless X-Hall network, the first communication node may be connected to the third communication node through the H3 interface, and may be connected to at least one communication node connected to the first communication node through the H2 interface. . That is, the first communication node may communicate with the third communication node connected through the H3 interface based on the MH3C protocol. In addition, the first communication node may communicate with at least one communication node connected through the H2 interface based on the MH2C protocol. Specifically, the wireless X-hole network may have the same structure as the reference model described with reference to FIG. 14 .

The methods according to the present invention may be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the computer-readable medium may be specially designed and configured for the present invention, or may be known and available to those skilled in the art of computer software.

Examples of computer-readable media include hardware devices specially configured to store and carry out program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as at least one software module to perform the operations of the present invention, and vice versa.

Although it has been described with reference to the above embodiments, it will be understood by those skilled in the art that various modifications and changes can be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. will be able

Claims (20)

A method of operating a first communication node for controlling a plurality of communication nodes included in a wireless xhaul network supporting mobility, the method comprising:
performing an attach procedure between the first communication node and a second communication node among the plurality of communication nodes;
establishing a path for communication between the second communication node and a third communication node on which an attach procedure has been completed among the plurality of communication nodes; and
and supporting communication between the second communication node and the third communication node using the set path. The method according to claim 1,
The first communication node,
A function of managing mobility for the plurality of communication nodes, a function of managing a communication path of the plurality of communication nodes, and a function of managing resources for the plurality of communication nodes An operating method of the first communication node to The method according to claim 1,
The first communication node,
When the attach procedure between the first communication node and the second communication node is completed, the state of the second communication node is transitioned from an unregistered state to a registered state 1 How communication nodes work. 4. The method according to claim 3,
The first communication node,
When the second communication node is in a registered state, an identifier (ID) of the second communication node is assigned to the second communication node. The method according to claim 1,
In the wireless X-hole network, the first communication node and the plurality of communication nodes are connected through an H3 interface, and the plurality of communication nodes are connected through an H2 interface. 1 How communication nodes work 6. The method of claim 5,
The first communication node,
The method of operating a first communication node, characterized in that the communication is performed based on an MXN H3 Control protocol (MH3C) with the plurality of communication nodes connected through the H3 interface. 6. The method of claim 5,
The second communication node,
The operating method of the first communication node, characterized in that the communication is performed based on at least one communication node connected to the second communication node connected through the H2 interface and an MH2C protocol (MXN H2 Control protocol). A method of operating a first communication node among a plurality of communication nodes included in a wireless xhaul network supporting mobility, the method comprising:
performing a discovery procedure for the plurality of communication nodes;
establishing a link between the first communication node and a second communication node discovered through the discovery procedure;
performing an attach procedure for a third communication node that controls the plurality of communication nodes in the wireless X-hole network;
establishing a path for communication between the first communication node and a fourth communication node on which an attach procedure has been completed among the plurality of communication nodes; and
and performing communication between the first communication node and the fourth communication node using the set path. 9. The method of claim 8,
The first communication node,
A sector ID including a first ID (identifier) of the second communication node and a sector index for distinguishing a sector of the second communication node is obtained through the search procedure A method of operation of the first communication node. 10. The method of claim 9,
The first communication node,
The operating method of the first communication node, characterized in that it further acquires a beam index of a beam for the second communication node through the search procedure. 9. The method of claim 8,
The first communication node,
When the attach procedure between the first communication node and the third communication node is completed, the state of the first communication node is transitioned from an unregistered state to a registered state. How communication nodes work. 12. The method of claim 11,
The first communication node,
When the state of the first communication node is the registered state, a second ID of the first communication node is assigned by the third communication node. 9. The method of claim 8,
The step of performing communication of the first communication node,
checking quality of service (QoS) of data transmitted from the first communication node;
determining the second communication node to which the data is transmitted among the plurality of communication nodes based on the checked QoS and a forwarding table preset by the third communication node;
generating a radio bearer for the determined second communication node; and
and transmitting the data based on the generated radio bearer. 9. The method of claim 8,
The first communication node,
Connected to the third communication node based on an H3 interface in the wireless X-Hall network, and connected to at least one communication node connected to the first communication node based on an H2 interface How to operate the first communication node to 15. The method of claim 14,
The first communication node,
The operating method of the first communication node, characterized in that performing communication based on the third communication node and MH3C protocol (MXN H3 Control protocol). 15. The method of claim 14,
The first communication node,
The operating method of the first communication node, characterized in that performing communication based on the at least one communication node and MH2C protocol (MXN H2 Control protocol). A first communication node for controlling a plurality of communication nodes included in a wireless xhaul network supporting mobility,
processor; and
At least one instruction executed through the processor comprises a memory (memory) stored,
The at least one command is
performing an attach procedure between the first communication node and a second communication node of the plurality of communication nodes;
establishing a path for communication between the second communication node and a third communication node on which an attach procedure has been completed among the plurality of communication nodes; And
A first communication node executed to support communication between the second communication node and the third communication node by using the established path. 18. The method of claim 17,
The first communication node,
A function of managing mobility for the plurality of communication nodes, a function of managing a communication path of the plurality of communication nodes, and a function of managing resources for the plurality of communication nodes A first communication node to 18. The method of claim 17,
The first communication node,
When the attach procedure between the first communication node and the second communication node is completed, the state of the second communication node is transitioned from an unregistered state to a registered state 1 communication node. 18. The method of claim 17,
In the wireless X-hole network, the first communication node and the plurality of communication nodes are connected through an H3 interface, and the plurality of communication nodes are connected through an H2 interface. 1 communication node.

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