WO2022239242A1

WO2022239242A1 - Base station, network node, and wireless communication method

Info

Publication number: WO2022239242A1
Application number: PCT/JP2021/018470
Authority: WO
Inventors: 天楊閔; 眞人谷口
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2022-11-17
Also published as: JPWO2022239242A1

Abstract

This base station comprises a transmission unit that, in a procedure for discovering address information of a peripheral base station peripheral to the base station, transmits a message, which includes source information related to address information of the base station and target information related to the address information of the peripheral base station. The source information is defined such that first source information, which is used in NSA (Non-Stand Alone) operation, and second source information, which is used in SA (Stand Alone) operation, may be included in the source information. The target information is defined such that first target information, which is used in the NSA operation, and second target information, which is used in the SA operation, may be included in the target information.

Description

Base station, network node and wireless communication method

The present disclosure relates to base stations, network nodes and wireless communication methods that perform TNL address discovery.

The 3rd Generation Partnership Project (3GPP) has specified the 5th generation mobile communication system (also called 5G, New Radio (NR) or Next Generation (NG)), and the next generation specification called Beyond 5G, 5G Evolution or 6G We are also proceeding with

3GPP supports dual connectivity (MR-DC (Multi-RAT Dual Connectivity)) using the first cell group (MCG (Master Cell Group)) and the second cell group (SCG (Secondary Cell Group)). . MR-DC includes EN-DC (E-UTRA-NR Dual Connectivity), NE-DC (NR-EUTRA Dual Connectivity) and NR-DC (NR-NR Dual Connectivity).

Furthermore, in SON (Self Organizing Network), a procedure for base stations to discover TNL (Transport Network Layer) addresses of other base stations (TNL address discovery procedure) is stipulated. A TNL address is an address used for SCTP (Stream Control Transmission Protocol) connection (eg, Non-Patent Document 1).

In the above-mentioned background, the inventors, as a result of diligent studies, focused on the situation in which base stations operated by SA (Stand Alone) and NSA (Non-Stand Alone) are deployed. We found the need to properly perform TNL address discovery.

Therefore, the present disclosure has been made in view of such circumstances, and includes base stations, network nodes, and base stations that can appropriately perform TNL address discovery under the circumstances where base stations operated by SA and NSA are deployed. The purpose is to provide a wireless communication method.

One aspect of the disclosure is a base station, wherein the procedure for discovering address information of neighboring base stations of the base station includes source information about the address information of the base station and target information about the address information of the neighboring base stations. a transmitting unit configured to transmit a message, wherein the source information includes first source information used in operations corresponding to both the first core network and the second core network, and the second source information independent of the first core network; and second source information used in operation corresponding to the core network, and the target information is defined so as to include the operation corresponding to both the first core network and the second core network by the peripheral base station. The gist is that it is defined so as to include first target information to be used and second target information to be used in operation corresponding to the second core network without depending on the first core network.

One aspect of the disclosure is a network node, in a procedure for discovering address information of neighboring base stations of a base station, a message including source information about the address information of the base station and target information about the address information of the neighboring base station. wherein the source information includes first source information used in operations corresponding to both the first core network and the second core network, and the second core independent of the first core network and second source information used in operation corresponding to the network, wherein the target information is used by the peripheral base station in operations corresponding to both the first core network and the second core network. The gist is that it is defined to include first target information and second target information that is used in operations corresponding to the second core network without depending on the first core network.

According to one aspect of the disclosure, there is provided a wireless communication method in which, in a procedure for discovering address information of base stations surrounding a base station, source information concerning the address information of the base station and target information concerning the address information of the surrounding base stations are included. transmitting a message, wherein the source information includes first source information used in operations corresponding to both the first core network and the second core network, and the second core independent of the first core network; and second source information used in operation corresponding to the network, wherein the target information is used by the peripheral base station in operations corresponding to both the first core network and the second core network. The gist is that it is defined to include first target information and second target information that is used in operations corresponding to the second core network without depending on the first core network.

FIG. 1 is an overall schematic configuration diagram of a radio communication system 10. As shown in FIG. FIG. 2 is a functional block configuration diagram of the eNB100A. FIG. 3 is a functional block configuration diagram of gNB100B. FIG. 4 is a sequence diagram showing operation example 1. FIG. FIG. 5 is a sequence diagram showing Operation Example 2. FIG. FIG. 6 is a diagram showing an example of Inter-system SON Configuration Transfer (ASN.1 format). FIG. 7 is a diagram showing an example of Inter-system SON Information (ASN.1 format). FIG. 8 is a diagram showing an example of SON Information Reply2 (ASN.1 format). FIG. 9 is a diagram showing an example of the hardware configuration of MME50, AMF60, eNB100A, and gNB100B.

Hereinafter, embodiments will be described based on the drawings. The same or similar reference numerals are given to the same functions and configurations, and the description thereof will be omitted as appropriate.

(1) Overall Schematic Configuration of Radio Communication System FIG. 1 is an overall schematic configuration diagram of a radio communication system 10 according to an embodiment. The radio communication system 10 is a radio communication system according to Long Term Evolution (LTE) and 5G New Radio (NR). Note that LTE may be called 4G, and NR may be called 5G.

LTE and NR may also be interpreted as radio access technology (RAT), and in embodiments, LTE may be referred to as the first radio access technology and NR may be referred to as the second radio access technology. .

The wireless communication system 10 includes an Evolved Universal Terrestrial Radio Access Network 20 (hereinafter E-UTRAN 20) and a Next Generation-Radio Access Network 30 (hereinafter NG RAN 30). The wireless communication system 10 also includes a terminal 200 (hereafter UE 200, User Equipment).

　E-UTRAN20 includes eNB100A, which is a base station according to LTE. The eNB 100A may be an example of a base station or an example of a peripheral base station.

NG RAN30 includes gNB100B, a base station according to 5G (NR). The gNB 100B may be an example of a base station or an example of a peripheral base station.

The eNB100A, gNB100B, and UE200 can support carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC), in which communication is performed simultaneously between the UE and multiple Nodes.

Specifically, eNB 100A and gNB 100B can form an area (which may be expressed as a cell) in which wireless communication with UE 200 can be performed, specifically area A1 or area A2.

Here, area A1 may be interpreted as an area where UE200 can communicate with eNB100A. Area A2 may be interpreted as an area in which UE 200 can communicate with gNB 100B. Area A1 and area A2 may overlap each other, and in areas where area A1 and area A2 overlap, UE200 communicates simultaneously with eNB100A and gNB100B EN-DC (E-UTRA-NR Dual Connectivity) or NE- DC (NR-EUTRA Dual Connectivity) may be performed. Note that FIG. 2 illustrates a case where the base station that can communicate with UE 200 in area A1 is eNB100A, but the base station that can communicate with UE 200 in area A1 is gNB100B provided in NG RAN30. good. In such cases, NR-DC (NR-NR Dual Connectivity) in which the UE 200 communicates with two or more gNB 100B (or cells) at the same time may be performed.

In the DC described above, a group of cells that can perform processing on the C-plane (control plane) and U-plane (user plane) may be called a first cell group (MCG; Master Cell Group). In the DC described above, a group of cells that can perform processing on the U-plane (user plane) may be referred to as a second cell group (SCG; Secondary Cell Group). For example, in EN-DC described above, eNB 100A may be called MN (Master Node) and gNB 100B may be called SN (Secondary Node). In the NE-DC described above, eNB100A may be called SN and gNB100B may be called MN. EN-DC, NE-DC and NR-DC may be referred to as MR (Multi-RAT)-DC.

The E-UTRAN 20 and NG RAN 30 are connected to the core network 40. Note that the E-UTRAN 20, NG RAN 30 and core network 40 may simply be called networks.

The core network 40 may include a first core network connected to the E-UTRAN 20. The first core network may be referred to as an EPC (Evolved Packet Core). The first core network may include MME (Mobility Management Entity) 50 . MME 50 may be an example of a network node. The MME 50 is a network node that executes processing related to the control plane. A node may be referred to as a function.

The core network 40 may include a second core network connected to the NG RAN 30. The second core network may be referred to as 5GC or 6GC. The second core network may include AMF (Access and Mobility Management Function) 60 . AMF 60 may be an example of a network node. AMF 60 is a network node that executes processing related to the control plane. A node may be referred to as a function.

Under the background described above, the eNB 100A can communicate with the gNB 100B operated in a manner compatible with both the first core network and the second core network (hereinafter referred to as NSA (Non-Stand Alone)). In other words, gNB100B operated by NSA can communicate with eNB100. The interface between gNB100B and eNB100A operated by NSA may be referred to as the X2 interface. The gNB 100B operated by NSA may be referred to as en-gNB.

The eNB 100A can communicate with the gNB 100B, which is operated in a mode corresponding to the second core network (hereinafter referred to as SA (Stand Alone)) without depending on the first core network. In other words, the gNB 100B operated by SA can communicate with the eNB 100. The interface between gNB100B and eNB100A operated by SA may be referred to as the Xn interface. Such operation may be referred to as NE-DC operation. The eNB 100A that communicates with the gNB 100B operated in SA may be called an ng-eNB.

The eNB 100A may perform procedures to discover address information of neighboring base stations (eg, gNB 100B). Similarly, the gNB100B may perform procedures to discover address information of neighboring base stations (eNB100A). Address information may be referred to as TNL (Transport Network Layer) address. A procedure to discover a TNL address may be referred to as a TNL address discovery procedure. A TNL address is an address used for an SCTP (Stream Control Transmission Protocol) connection.

(2) Functional Block Configuration of Radio Communication System Next, the functional block configuration of the radio communication system 10 will be described.

First, the functional block configuration of the eNB100A will be explained. FIG. 2 is a functional block configuration diagram of the eNB100A. The eNB 100A has a receiver 110A, a transmitter 120A and a controller 130A.

The receiving unit 110A receives various messages from the first core network. The receiving unit 110A may receive various signals from the UE200. The receiver 110A may receive the UL signal via a UL channel such as PUCCH (Physical Uplink Control Channel) or PUSCH (Physical Uplink Shared Channel).

The transmission unit 120A transmits various messages to the first core network. The transmitter 120A may transmit various signals to the UE200. The transmitter 120A may transmit a DL signal via a DL channel such as PDCCH (Physical Downlink Control Channel) or PDSCH (Physical Downlink Shared Channel).

The control unit 130A controls the eNB 100A. For example, the control unit 130A may control the TNL address discovery procedure.

Here, in a procedure (TNL address discovery procedure) for discovering address information of neighboring base stations (eg, gNB100B), transmitting section 120A transmits a message including source information regarding address information of eNB100A and target information regarding address information of gNB100B. A transmission unit for transmission may be configured. The message may be called eNB CONFIGURATION TRANSFER. The eNB CONFIGURATION TRANSFER may contain an information element called Inter-system SON Configuration Transfer.

In addition to the source eNB ID that identifies eNB100A and the target NG-RAN node ID that identifies gNB100B, the Inter-system SON Configuration Transfer may include source information about the address information of eNB100A and target information about the address information of gNB100B.

The source information may be defined so as to include first source information used in NSA operation and second source information used in SA operation or NE-DC operation (hereinafter simply SA operation). The first source information may be called X2 TNL Configuration Info. X2 TNL Configuration Info may contain Source eNB X2 TNL Configuration Info. Information elements specified in 3GPPP TS36.413 may be used as Source eNB X2 TNL Configuration Info. Note that the first source information may be used as the TNL address information of the eNB 100A when the gNB 100B is used as the en-gNB. The second source information may be called Xn TNL Configuration Info. Xn TNL Configuration Info may include Source eNB Xn TNL Configuration Info. Note that the second source information may be used as the TNL address information of the eNB 100A when the eNB 100A is used as the ng-eNB.

Target information may be defined so as to include first target information used in NSA operation and second target information used in SA operation. Target information may be referred to as SON Information Request2. The first target information may be called X2 TNL Configuration Info. Note that the first target information may be used as the TNL address information of the gNB 100B when the gNB 100B is used as the en-gNB. The second target information may be called Xn TNL Configuration Info. The second target information may be used as TNL address information of gNB 100B when eNB 100A is used as ng-eNB.

Second, the functional block configuration of gNB100B will be explained. FIG. 3 is a functional block configuration diagram of gNB100B. The gNB 100B has a receiver 110B, a transmitter 120B and a controller 130B.

The receiving unit 110B receives various messages from the second core network. The receiving unit 110B may receive various signals from the UE200. The receiver 110B may receive the UL signal via a UL channel such as PUCCH (Physical Uplink Control Channel) or PUSCH (Physical Uplink Shared Channel).

The transmission unit 120B transmits various messages to the second core network. The transmitter 120B may transmit various signals to the UE200. The transmitter 120B may transmit the DL signal via a DL channel such as PDCCH Physical Downlink Control Channel) or PDSCH (Physical Downlink Shared Channel).

The control unit 130B controls the gNB100B. For example, the control unit 130B may control the TNL address discovery procedure.

Here, in a procedure (TNL address discovery procedure) for discovering address information of neighboring base stations (e.g., eNB100A), transmitting section 120B transmits a message including source information about address information of gNB100B and target information about address information of eNB100A. A transmission unit for transmission may be configured. The message may be called UPLINK RAN CONFIGURATION TRANSFER. The UPLINK RAN CONFIGURATION TRANSFER may contain an information element called Inter-system SON Configuration Transfer.

In addition to the source NG-RAN node ID that identifies gNB100B and the target eNB ID that identifies eNB100A, the Inter-system SON Configuration Transfer may include source information about the address information of gNB100B and target information about the address information of eNB100A.

The source information may be defined so as to include first source information used for NSA operation and second source information used for SA operation. The first source information may be called X2 TNL Configuration Info. X2 TNL Configuration Info may include Source NG-RAN node X2 TNL Configuration Info. Note that the first source information may be used as the TNL address information of the gNB 100B when the gNB 100B is used as the en-gNB. The second source information may be called Xn TNL Configuration Info. Xn TNL Configuration Info may include Source NG-RAN node Xn TNL Configuration Info. Information elements specified in 3GPPP TS38.413 may be used as Source NG-RAN node Xn TNL Configuration Info. Note that the second source information may be used as TNL address information for gNB 100B when used as TNL address information for eNB 100A when eNB 100A is used as ng-eNB.

Target information may be defined so as to include first target information used in NSA operation and second target information used in SA operation. Target information may be referred to as SON Information Request2. The first target information may be called X2 TNL Configuration Info. The first target information may be used as TNL address information of eNB 100A when gNB 100B is used as en-gNB. The second target information may be called Xn TNL Configuration Info. The second target information is used as TNL address information of eNB 100A when eNB 100A is used as ng-eNB.

(3) Operation Example Next, an operation example of the embodiment will be described. A case (operation example 1) in which the eNB 100A triggers the TNL address discovery procedure and a case (operation example 2) in which the gNB 100B triggers the TNL address discovery procedure will be described below.

(3.1) Operation example 1
As shown in FIG. 4, eNB100A transmits eNB CONFIGURATION TRANSFER containing Inter-system SON Configuration Transfer to MME50 in step S10.

The Inter-system SON Configuration Transfer may include any one of Source eNB X2 TNL Configuration Info and Source eNB Xn TNL Configuration Info as source information. Inter-system SON Configuration Transfer may include both Source eNB X2 TNL Configuration Info and Source eNB Xn TNL Configuration Info as source information.

　Inter-system SON Configuration Transfer includes SON Information Request2. SON Information Request2 may include either one of X2 TNL Configuration Info and Xn TNL Configuration Info as target information. SON Information Request2 may contain both X2 TNL Configuration Info and Xn TNL Configuration Info as target information.

At step S11, the MME 50 transparently transmits the eNB CONFIGURATION TRANSFER to the AMF 60. Such transparent transmission may be referred to as N26 relay configuration transfer signaling.

In step S12, AMF60 sends DOWNLINK RAN CONFIGURATION TRANSFER including Inter-system SON Configuration Transfer to gNB100B.

Inter-system SON Configuration Transfer may include either one of Source eNB X2 TNL Configuration Info and Source eNB Xn TNL Configuration Info as source information, similar to step S10. Inter-system SON Configuration Transfer may include both Source eNB X2 TNL Configuration Info and Source eNB Xn TNL Configuration Info as source information.

In step S13, the gNB 100B transmits UPLINK RAN CONFIGURATION TRANSFER including Inter-system SON Configuration Transfer to AMF 60.

　Inter-system SON Configuration Transfer contains the address information requested by SON Information Request2 (hereafter, SON Information Reply2). SON Information Reply2 may contain any one of X2 TNL Configuration Info and Xn TNL Configuration Info. SON Information Reply2 may contain both X2 TNL Configuration Info and Xn TNL Configuration Info.

In step S14, AMF60 transparently transmits UPLINK RAN CONFIGURATION TRANSFER to MME50. Such transparent transmission may be referred to as N26 relay configuration transfer signaling.

In step S15, the MME 50 transmits MME CONFIGURATION TRANSFER including Inter-system SON Configuration Transfer to the eNB 100A.

　Inter-system SON Configuration Transfer includes SON Information Reply2, similar to step S13. SON Information Reply2 may contain any one of X2 TNL Configuration Info and Xn TNL Configuration Info. SON Information Reply2 may contain both X2 TNL Configuration Info and Xn TNL Configuration Info.

(3.2) Operation example 2
As shown in FIG. 4, in step S20, the gNB 100B transmits UPLINK RAN CONFIGURATION TRANSFER including Inter-system SON Configuration Transfer to AMF60.

Inter-system SON Configuration Transfer may include any one of Source NG-RAN node X2 TNL Configuration Info and Source NG-RAN node Xn TNL Configuration Info as source information. Inter-system SON Configuration Transfer may include both Source NG-RAN node X2 TNL Configuration Info and Source NG-RAN node Xn TNL Configuration Info as source information.

In step S21, AMF60 transparently transmits UPLINK RAN CONFIGURATION TRANSFER to MME50. Such transparent transmission may be referred to as N26 relay configuration transfer signaling.

At step S22, the MME 50 transmits MME CONFIGURATION TRANSFER including Inter-system SON Configuration Transfer to the eNB 100A.

Inter-system SON Configuration Transfer may include any one of Source NG-RAN node X2 TNL Configuration Info and Source NG-RAN node Xn TNL Configuration Info as source information, similar to step S20. Inter-system SON Configuration Transfer may include both Source NG-RAN node X2 TNL Configuration Info and Source NG-RAN node Xn TNL Configuration Info as source information.

In step S23, the eNB 100A transmits an eNB CONFIGURATION TRANSFER containing the Inter-system SON Configuration Transfer to the MME 50.

　Inter-system SON Configuration Transfer contains the address information (SON Information Reply2) requested by SON Information Request2. SON Information Reply2 may contain any one of X2 TNL Configuration Info and Xn TNL Configuration Info. SON Information Reply2 may contain both X2 TNL Configuration Info and Xn TNL Configuration Info.

At step S24, the MME 50 transparently transmits the eNB CONFIGURATION TRANSFER to the AMF 60. Such transparent transmission may be referred to as N26 relay configuration transfer signaling.

At step S25, the MME 50 transmits a DOWNLINK RAN CONFIGURATION TRANSFER containing the Inter-system SON Configuration Transfer to the eNB 100A.

　Inter-system SON Configuration Transfer includes SON Information Reply2, similar to step S23. SON Information Reply2 may contain any one of X2 TNL Configuration Info and Xn TNL Configuration Info. SON Information Reply2 may contain both X2 TNL Configuration Info and Xn TNL Configuration Info.

(4) Configuration Examples of Information Elements FIGS. 6 to 8 are diagrams showing configuration examples of the information elements described above.

As shown in FIG. 6, Inter-system SON Configuration Transfer can include X2 TNL Configuration info and Xn TNL Configuration info as newly defined information elements. X2 TNL Configuration info is an example of first source information, and Xn TNL Configuration info is an example of second source information. Note that X2 TNL Configuration info and Xn TNL Configuration info may be included in Inter-system SON Configuration Transfer when Inter-system SON Configuration Transfer includes SON Information Request 2 that can be set in Inter-system SON Information .

As shown in FIG. 7, Inter-system SON Information included in Inter-system SON Configuration Transfer includes SON Information Request 2 and SON Information Reply 2 as newly defined information elements.

　SON Information Request 2 is an example of target information and can include X2 TNL Configuration info and Xn TNL Configuration info. X2 TNL Configuration info is an example of first target information, and Xn TNL Configuration info is an example of second target information.

　SON Information Reply 2 is an information element containing the address information requested by SON Information Request 2, and may be a newly defined information element. As shown in FIG. 8, SON Information Reply 2 may contain X2 TNL Configuration info and Xn TNL Configuration info.

(5) Functions and effects In the embodiment, in the TNL address discovery procedure, the base station (e.g., eNB100A or gNB100B) receives a message (Fig. 4 or UPLINK RAN CONFIGURATION TRANSFER shown in FIG. 5). Source information is defined to include first source information used in NSA operation and second source information used in SA operation. Similarly, target information is defined such that the target information may include first target information used in NSA operations and second target information used in SA operations. According to such a configuration, the TNL addresses of the eNB100A and gNB100B can be obtained appropriately under conditions where both NSA operation and SA operation are assumed.

For example, the base station may transmit a message including the first source information and the second source information in the TNL address discovery procedure assuming NSA operation (or SA operation). According to such a configuration, it is possible to grasp the TNL address of the base station used in SA operation (or NSA operation) by the TNL address discovery procedure triggered by the base station, so in SA operation (or NSA operation) Neighboring base stations do not need to trigger the TNL address discovery procedure again for the TNL address of the base station to be used.

Similarly, the base station may transmit a message containing the first target information and the second target information in the TNL address discovery procedure assuming NSA operation (or SA operation). According to such a configuration, the TNL address discovery procedure can simultaneously grasp the TNL addresses of the surrounding base stations used in SA operation (or NSA operation), so that the surrounding base stations used in SA operation (or NSA operation) no need to trigger a new TNL address discovery procedure for TNL addresses in

(6) Other Embodiments Although the embodiments have been described above, it is obvious to those skilled in the art that the present invention is not limited to the description of the embodiments, and that various modifications and improvements are possible.

In the disclosure above, the case where eNB100A and gNB100B send messages requesting the TNL addresses of neighboring base stations was mainly explained. However, the above disclosure is not so limited. The above disclosure may be considered as a case where network nodes such as MME 50 and AMF 60 send messages requesting TNL addresses of neighboring base stations. Specifically, as shown in S12 of FIG. 4 described above, AMF 60 transmits a message (DOWNLINK RAN CONFIGURATION TRANSFER shown in FIG. 4) including source information about the TNL address of eNB 100A and target information about the TNL address of gNB 100B. . As shown in S22 of FIG. 5 described above, the MME 50 transmits a message (MME CONFIGURATION TRANSFER shown in FIG. 5) including source information about the TNL address of gNB100B and target information about the TNL address of eNB100A.

Although not specifically mentioned in the above disclosure, in the TNL address discovery procedure in which the eNB100A connected to the EPC discovers the TNL address of the gNB100B connected to the 5GC, the eNB100A includes the X2 TNL Configuration Info flag in the SON information request 2. , may send an eNB CONFIGURATION TRANSFER containing SON information request 2. The X2 TNL Configuration Info flag may be considered to be a flag for requesting the first address information (X2 TNL Configuration info) of gNB100B in addition to the second address information (Xn TNL Configuration info) of gNB100B.

Although not specifically mentioned in the above disclosure, in the TNL address discovery procedure in which gNB100B connected to 5GC discovers the TNL address of eNB100A connected to EPC, gNB100B includes Xn TNL Configuration Info flag in SON information request 2. , may send an eNB CONFIGURATION TRANSFER containing SON information request 2. The Xn TNL Configuration Info flag may be considered to be a flag for requesting the second address information (Xn TNL Configuration info) of the eNB 100A in addition to the first address information (X2 TNL Configuration info) of the eNB 100A.

Also, the block configuration diagrams (FIGS. 2 and 3) used to describe the above-described embodiment show blocks for each function. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of implementing each functional block is not particularly limited. That is, each functional block may be implemented using one device physically or logically coupled, or directly or indirectly using two or more physically or logically separate devices (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices. A functional block may be implemented by combining software in the one device or the plurality of devices.

Functions include judging, determining, determining, calculating, calculating, processing, deriving, investigating, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. can't For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. In either case, as described above, the implementation method is not particularly limited.

Furthermore, the MME 50, AMF 60, eNB 100A, and gNB 100B (applicable devices) described above may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 9 is a diagram showing an example of the hardware configuration of the device. As shown in FIG. 9, the device may be configured as a computing device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following explanation, the term "apparatus" can be read as a circuit, device, unit, or the like. The hardware configuration of the device may be configured to include one or more of each device shown in the figure, or may be configured without some of the devices.

Each functional block of the device is realized by any hardware element of the computer device, or a combination of the hardware elements.

In addition, each function of the device is implemented by causing the processor 1001 to perform calculations, controlling communication by the communication device 1004, and controlling the It is realized by controlling at least one of data reading and writing in 1002 and storage 1003 .

A processor 1001, for example, operates an operating system and controls the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including interfaces with peripheral devices, a control unit, an arithmetic unit, registers, and the like.

Also, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments is used. Further, the various processes described above may be executed by one processor 1001, or may be executed by two or more processors 1001 simultaneously or sequentially. Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via an electric communication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), Random Access Memory (RAM), etc. may be The memory 1002 may also be called a register, cache, main memory (main storage device), or the like. The memory 1002 can store programs (program code), software modules, etc. capable of executing a method according to an embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, for example, an optical disc such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, a Blu-ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, and/or the like. Storage 1003 may also be referred to as an auxiliary storage device. The recording medium described above may be, for example, a database, server, or other suitable medium including at least one of memory 1002 and storage 1003 .

The communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.

The communication device 1004 includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc., for realizing at least one of frequency division duplex (FDD) and time division duplex (TDD). may consist of

The input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside. The output device 1006 is an output device (eg, display, speaker, LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

Also, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between devices.

In addition, the device includes hardware such as a microprocessor, digital signal processor (DSP), application specific integrated circuit (ASIC), programmable logic device (PLD), field programmable gate array (FPGA), etc. A part or all of each functional block may be implemented by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

In addition, notification of information is not limited to the aspects/embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may include physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI), higher layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), other signals, or combinations thereof, and RRC signaling may also be referred to as RRC messages, e.g., RRC Connection Setup ) message, RRC Connection Reconfiguration message, or the like.

Each aspect/embodiment described in this disclosure includes Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system ( 5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)) , IEEE 802.16 (WiMAX®), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth®, other suitable systems, and/or next-generation systems enhanced therefrom. may be applied to Also, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.

A specific operation that is performed by a base station in the present disclosure may be performed by its upper node in some cases. In a network consisting of one or more network nodes with a base station, various operations performed for communication with a terminal may be performed by the base station and other network nodes other than the base station (e.g. MME or S-GW, etc., but not limited to). Although the case where there is one network node other than the base station is exemplified above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Information, signals (information, etc.) can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may be input and output via multiple network nodes.

Input/output information may be stored in a specific location (for example, memory) or managed using a management table. Input and output information may be overwritten, updated, or appended. The output information may be deleted. The entered information may be transmitted to other devices.

The determination may be made by a value represented by one bit (0 or 1), by a true/false value (Boolean: true or false), or by numerical comparison (for example, a predetermined value).

Each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching along with execution. In addition, the notification of predetermined information (for example, notification of “being X”) is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.

Software, whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.

In addition, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, the Software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) to access websites, Wired and/or wireless technologies are included within the definition of transmission medium when sent from a server or other remote source.

The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of

The terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, the channel and/or symbols may be signaling. A signal may also be a message. A component carrier (CC) may also be called a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" used in this disclosure are used interchangeably.

In addition, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information. may be represented. For example, radio resources may be indexed.

The names used for the parameters described above are not restrictive names in any respect. Further, the formulas, etc., using these parameters may differ from those expressly disclosed in this disclosure. Since the various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable designation, the various designations assigned to these various channels and information elements are in no way restrictive designations. is not.

In the present disclosure, "base station (BS)", "radio base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", " "access point", "transmission point", "reception point", "transmission/reception point", "cell", "sector", "cell group", " Terms such as "carrier", "component carrier" may be used interchangeably. A base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.

A base station can accommodate one or more (eg, three) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area corresponding to a base station subsystem (e.g., a small indoor base station (Remote Radio)). Head: RRH) can also provide communication services.

The term "cell" or "sector" refers to part or all of the coverage area of at least one of a base station and base station subsystem that provides communication services in this coverage.

In this disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal" may be used interchangeably. .

A mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

At least one of the base station and mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like. The mobile body may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile body (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ). Note that at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations. For example, at least one of the base station and mobile station may be an Internet of Things (IoT) device such as a sensor.

Also, the base station in the present disclosure may be read as a mobile station (user terminal, hereinafter the same). For example, communication between a base station and a mobile station is replaced with communication between multiple mobile stations (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.) Regarding the configuration, each aspect/embodiment of the present disclosure may be applied. In this case, the mobile station may have the functions that the base station has. Also, words such as "up" and "down" may be replaced with words corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may be read as side channels.

Similarly, a mobile station in the present disclosure may be read as a base station. In this case, the base station may have the functions that the mobile station has.
A radio frame may consist of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. A subframe may also consist of one or more slots in the time domain. A subframe may be a fixed time length (eg, 1 ms) independent of numerology.

A numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, transmission and reception specific filtering operations performed by the receiver in the frequency domain, specific windowing operations performed by the transceiver in the time domain, and/or the like.

A slot may consist of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. A slot may be a unit of time based on numerology.

A slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) that is transmitted in time units larger than a minislot may be referred to as PDSCH (or PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.

Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations.

For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, and one slot or one minislot may be called a TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, may be a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms may be Note that the unit representing the TTI may be called a slot, minislot, or the like instead of a subframe.

Here, TTI refers to, for example, the minimum scheduling time unit in wireless communication. For example, in the LTE system, a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis. Note that the definition of TTI is not limited to this.

The TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, codewords, etc., or may be a processing unit for scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.

If one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum scheduling time unit. Also, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

A TTI with a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI that is shorter than a regular TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and so on.

In addition, long TTI (for example, normal TTI, subframe, etc.) may be read as TTI having a time length exceeding 1 ms, and short TTI (for example, shortened TTI, etc.) is less than the TTI length of long TTI and 1 ms. A TTI having a TTI length greater than or equal to this value may be read as a replacement.

A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of neurology, and may be 12, for example. The number of subcarriers included in an RB may be determined based on neumerology.

Also, the time domain of an RB may include one or more symbols and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI long. One TTI, one subframe, etc. may each consist of one or more resource blocks.

One or more RBs are physical resource blocks (Physical RB: PRB), sub-carrier groups (SCG), resource element groups (REG), PRB pairs, RB pairs, etc. may be called.

In addition, a resource block may be composed of one or more resource elements (Resource Element: RE). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

A Bandwidth Part (BWP) (which may also be called a Bandwidth Part) represents a subset of contiguous common resource blocks (RBs) for a neumerology in a carrier. good. Here, the common RB may be identified by an RB index based on the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP). One or more BWPs may be configured in one carrier for a UE.

At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be read as "BWP".

The structures such as radio frames, subframes, slots, minislots and symbols described above are only examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of Configurations such as the number of subcarriers and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc. can be varied.

The terms "connected," "coupled," or any variation thereof mean any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements being "connected" or "coupled." Couplings or connections between elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in this disclosure, two elements are defined using at least one of one or more wires, cables and printed electrical connections and, as some non-limiting and non-exhaustive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions, and the like.

The reference signal can also be abbreviated as Reference Signal (RS), and may also be called Pilot depending on the applicable standard.

The term "based on" as used in this disclosure does not mean "based only on" unless otherwise specified. In other words, the phrase "based on" means both "based only on" and "based at least on."

"Means" in the configuration of each device described above may be replaced with "unit", "circuit", "device", or the like.

Any reference to elements using the "first," "second," etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, references to first and second elements do not imply that only two elements may be employed therein or that the first element must precede the second element in any way.

Where "include," "including," and variations thereof are used in this disclosure, these terms are inclusive, as is the term "comprising." is intended. Furthermore, the term "or" as used in this disclosure is not intended to be an exclusive OR.

In this disclosure, if articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are plural.

The terms "determining" and "determining" used in this disclosure may encompass a wide variety of actions. "Judgement" and "determination" are, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (eg, lookup in a table, database, or other data structure), ascertaining as "judged" or "determined", and the like. Also, "judgment" and "determination" are used for receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (accessing) (for example, accessing data in memory) may include deeming that a "judgment" or "decision" has been made. In addition, "judgment" and "decision" are considered to be "judgment" and "decision" by resolving, selecting, choosing, establishing, comparing, etc. can contain. In other words, "judgment" and "decision" may include considering that some action is "judgment" and "decision". Also, "judgment (decision)" may be read as "assuming", "expecting", "considering", or the like.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean that "A and B are different from C". Terms such as "separate," "coupled," etc. may also be interpreted in the same manner as "different."

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be practiced with modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Accordingly, the description of the present disclosure is for illustrative purposes and is not meant to be limiting in any way.

10 Radio communication system 20 E-UTRAN
30NG RAN
40 Core Network 50 E-SMLC
100A eNB
100B gNB
200UE
210 radio signal transmission/reception unit 220 amplifier unit 230 modulation/demodulation unit 240 control signal/reference signal processing unit 250 encoding/decoding unit 260 data transmission/reception unit 270 control unit 300 MN
400 SN
500 UPF
1001 Processor 1002 Memory 1003 Storage 1004 Communication Device 1005 Input Device 1006 Output Device 1007 Bus

Claims

a base station,
a transmitting unit configured to transmit a message including source information regarding the address information of the base station and target information regarding the address information of the neighboring base station in the procedure of discovering address information of the neighboring base stations of the base station;
The source information includes first source information used in operations corresponding to both the first core network and the second core network, and second source information used in operations corresponding to the second core network without depending on the first core network. defined to include two sources of information,
The target information includes first target information used by the peripheral base station for operation corresponding to both the first core network and the second core network, and second core network independent of the first core network. second target information for use in operations corresponding to the base station.
The base station according to claim 1, wherein said transmission unit transmits said message including both said first source information and said second source information as said source information.
The base station according to claim 1, wherein said transmission unit transmits said message including both said first target information and said second target information as said target information.
a transmitting unit configured to transmit a message including source information regarding the address information of the base station and target information regarding the address information of the neighboring base station in the procedure for discovering address information of the neighboring base stations of the base station;
The source information includes first source information used in operations corresponding to both the first core network and the second core network, and second source information used in operations corresponding to the second core network without depending on the first core network. defined to include two sources of information,
The target information includes first target information used by the peripheral base station for operation corresponding to both the first core network and the second core network, and second core network independent of the first core network. a second target information for use in operations corresponding to the network node.
A procedure for discovering address information of neighboring base stations of a base station, comprising transmitting a message containing source information about the address information of the base station and target information about the address information of the neighboring base stations;
The source information includes first source information used in operations corresponding to both the first core network and the second core network, and second source information used in operations corresponding to the second core network without depending on the first core network. defined to include two sources of information,
The target information includes first target information used by the peripheral base station for operation corresponding to both the first core network and the second core network, and second core network independent of the first core network. and second target information for use in operations corresponding to the wireless communication method.