KR20220058005A - Apparatus for setting time delay for coverage matching of in-building repeater equipment - Google Patents

Abstract

According to the present invention, a device for setting a time delay comprises: a 5G base station management device for detecting a time delay of a 4G repeater from a 4G base station management device of a matching target 4G base station; and a transmission unit configured to subtract the time delay of the 4G repeater from an end-to-end time delay so as to set a time delay of a 5G base station including the transmission unit and a layer division unit.

Description

Time delay setting apparatus for coverage matching of in-building repeater equipment {Apparatus for setting time delay for coverage matching of in-building repeater equipment}

The present invention relates to a time delay setting technique, and more particularly, to an apparatus for setting a time delay of a repeater for coverage matching of in-building repeater equipment introduced into a network topology of a non-standalone (NSA) structure.

5G in-building services and some outdoor services are providing services by relaying base station signals. These services use a synchronization method based on 4G coverage. In addition, this service adopts a method of acquiring synchronization and basic information through 4G in the NSA method and transmitting data through 5G.

Publication of Korean Patent Application Laid-Open No. 2018-0005996 on January 17, 2018 (Title: 5G in-building relay system and 5G in-building relay method sharing RF cable within a building)

It is an object of the present invention to provide an apparatus for setting a time delay of a repeater for coverage matching of in-building repeater equipment introduced into a network topology of a non-standalone (NSA) structure.

A device for setting time delay according to a preferred embodiment of the present invention for achieving the above object is a 5G base station management device for detecting a time delay of a 4G repeater from a 4G base station management device of a matching target 4G base station, and end-to-end and the transmitting unit configured to set the time delay of the 5G base station including the transmitting unit and the layer division unit by subtracting the time delay of the 4G repeater from the (end-to-end) time delay.

The transfer unit calculates the time delay of the 5G repeater by subtracting the time delay of the 5G base station from the end-to-end time delay.

The 5G repeater measures the time delay of the optical section between the nodes of the plurality of radio units of the 5G repeater and transmits it to the transmitting unit, and the transmitting unit is the 5G base station at the end-to-end time delay Calculate the time delay of the 5G repeater by subtracting the time delay of It is characterized in that it is set as the time delay of the 5G repeater by subtracting .

The 5G base station management device stores a list of 4G base stations having the same service coverage as the 5G base station in a database, and when the 5G network is initially installed, the matching target 4G base station having the same service coverage as the 5G base station is detected in the database.

The 5G base station management device is characterized in that it periodically receives a time delay set for the 4G repeater connected to the detected 4G base station from the 4G base station management device corresponding to the detected 4G base station.

According to the present invention, it is possible to shorten work and opening optimization time by automatically performing time delay setting during initial 5G deployment to match 4G and 5G coverage. Specifically, due to the structure of the in-building service, significant time and manpower is invested to check whether 4G and 5G coverage are consistent everywhere in the in-building service area. However, the present invention can match the 5G coverage corresponding to the 4G coverage by automatically setting the time delay, thereby shortening the time for optimizing the deployment and opening and reducing the cost.

1 is a diagram for explaining a communication system that provides a plurality of wireless communication technologies in the same core device according to an embodiment of the present invention.
2 is a view for explaining the configuration of a time delay setting apparatus for coverage matching of in-building repeater equipment according to an embodiment of the present invention.
3 is a graph for explaining a method of setting a time delay for coverage matching of in-building repeater equipment according to an embodiment of the present invention.
4 is a diagram for explaining a method of setting a time delay of a 5G network for coverage matching of in-building repeater equipment according to an embodiment of the present invention.
5 is a flowchart illustrating a method for setting a time delay for coverage matching of in-building repeater equipment according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment in which a person of ordinary skill in the art to which the present invention pertains can easily practice the present invention will be described in detail. However, when it is determined that a detailed description of a related well-known function or configuration may unnecessarily obscure the gist of the present invention in explaining the operating principle of the preferred embodiment of the present invention in detail, the detailed description thereof will be omitted. This is to more clearly convey the essence of the present invention by omitting unnecessary description. In addition, the present invention can make various changes and can have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description, which is not intended to limit the present invention to specific embodiments, It should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In addition, when an element is referred to as being “connected” or “connected” to another element, it means that it is logically or physically connected or can be connected. In other words, it should be understood that a component may be directly connected or connected to another component, but another component may exist in between, and may be indirectly connected or connected.

In addition, the terms used herein are used only 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 addition, terms such as "comprises" or "have" described in this specification are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or the It should be understood that the above does not preclude the possibility of the existence or addition of other features or numbers, steps, operations, components, parts, or combinations thereof.

Now, an embodiment of the present invention will be described in detail with reference to the drawings. In this case, the same reference numerals are used for parts having similar functions and actions throughout the drawings, and overlapping descriptions thereof will be omitted. In addition, in order to avoid obscuring the concept of the present invention, well-known structures and devices may be omitted or shown in block diagram form focusing on core functions of each structure and device.

First, a network environment to which an embodiment of the present invention is applied will be described. 1 is a diagram for explaining a communication system that provides a plurality of wireless communication technologies in the same core device according to an embodiment of the present invention. 1, a communication system according to an embodiment of the present invention includes a terminal 10, a 4G base station management device (4G Element Management System (EMS): 400), a 4G base station 410, a 4G repeater 420, and 4G. Repeater Management System (4G Repeater Control System (RCS): 430), 5G Base Station Management System (5G Element Management System (EMS): 500), 5G Base Station (510), 5G Repeater (520), 5G Repeater Management System (5G Repeater) Control System (RCS): 530) and a core device (Evolved Packet Core (EPC): 600, hereinafter referred to as 'EPC').

EPC 600 is a mobility management device (Mobility Management Entity (MME), hereinafter referred to as 'MME'), a serving gateway (Serving Gateway (SGW), hereinafter referred to as 'SGW') and a packet gateway (Packet Data Network　Gateway ( PGW), hereinafter referred to as 'PGW'). In addition, the core device 600 includes more entities, including a Home Subscriber Server (HSS), a Policy and Charging Rules Function (PCRF), and the like, but since it is not a gist of the present invention, a detailed description thereof will be omitted.

4G (generation) base station 410 is 3GPP Rel. It is a radio access network (RAN) device that provides a radio section service to the terminal 10 according to 4G technology based on LTE Advanced of 10. Representatively, the 4G (generation) base station 410 may illustrate an eNB. 5G base station 510 is 3GPP Rel. 15, it is a radio access network device that provides a radio section service to the terminal 10 according to 5G technology based on 5G NR (New Radio). Representatively, the 5G base station 510 may exemplify a gNB. In the embodiment of the present invention, the 5G base station 510 uses a different radio access technology from the 4G base station 410 , but shares the 4G base station 410 and the EPC 600 . That is, the network according to the embodiment of the present invention has a non-standalone (NSA) structure. The terminal 10 can utilize the radio section resources of the 4G base station 410 and the 5G base station 510 as well as the EPC 600, which is a core device including the MME, SGW and PGW through the 4G base station 410. can be linked

That is, the communication system according to the embodiment of the present invention shares the core device, for example, the EPC 60, but is connected to the terminal 10 through a different radio access technology (RAT), for example, LTE, NR, etc. It includes a plurality of base stations 410 and 510 that provide a radio section service. In particular, in the embodiment of the present invention, a plurality of base stations will be described as base stations using 4G (LTE) and 5G (NR) technologies, but this is illustrative and the present invention is not limited thereto. Those of ordinary skill in the art can provide radio section services using different radio access technologies as well as different radio access technologies for generations of the same series, and communication having a topology interworking with the same core network It will be understood that the present invention can be applied to a system.

According to the present invention, each of the 4G base station 410 and the 5G base station 510 operates a repeater, that is, the 4G repeater 420 and the 5G repeater 520, and the 4G base station 410 and the 4G repeater 420 and , it is required to match the time delay in order to match the coverage of the 5G base station 510 and the 5G repeater 520 .

Then, the apparatus for setting a time delay for coverage matching of the in-building repeater equipment will be described in more detail. 2 is a diagram for explaining the configuration of a time delay setting apparatus for coverage matching of in-building repeater equipment according to an embodiment of the present invention. 3 is a graph for explaining a time delay setting method for coverage matching of in-building repeater equipment according to an embodiment of the present invention. 4 is a diagram for explaining a method of setting a time delay of a 5G network for coverage matching of in-building repeater equipment according to an embodiment of the present invention.

Referring to FIG. 2 , as described above, the 4G network includes a 4G base station management device 400 , a 4G base station 410 , a 4G repeater 420 , and a 4G repeater management device 430 .

The 4G base station 410 includes a data unit (Digital Unit (DU): 411 ) and a matching unit 412 . The data unit 411 mainly performs a base band process in a call processing process. The matching device 412 is a device that performs matching for the 4G repeater 420 . That is, the matching device 412 serves as an interface between the data unit 411 and the 4G repeater 420 . For this interface, the matching device 412 converts the digital signal transmitted from the data unit 411 into an analog signal and provides it to the 4G repeater 420, or converts the digital signal received from the 4G repeater 420 into an analog signal. It may be converted into a signal and provided to the data unit 411 .

The 4G repeater 420 includes a donor unit (Doner: 421) and a remote (Remote Optic (RO): 422). The donor part 421 and the remote 422 are formed in a separate form, and the donor part 421 and the remote 422 are connected through an optical cable. In particular, a plurality of remotes 422 to one donor unit 421 may be connected across a plurality of stages in a cascade manner.

Meanwhile, as described above, the 5G network includes a 5G base station management device 500 , a 5G base station 510 , a 5G repeater 520 , and a 5G repeater management device 530 .

5G base station 510 includes a transfer unit (Distributed Unit Higher layer (DU-H): 511) and a layer division unit (Layer Split Hub (LSH): 512). 5G repeater 520 includes a radio unit (Passive Remote Unit (PRU): 521).

The transfer unit 511 basically serves to transfer data from an upper layer to the 5G repeater 520 . The layer division unit 512 performs a role of transferring data from the transmission unit 511 to the 5G repeater 520 by matching with the 5G repeater 520 . The layer division unit 512 may define an interface with the radio unit 521 and communicate with the radio unit 521 through the defined interface. This interface may be a Common Public Radio Interface (CPRI) or an Enhanced Common Public Radio Interface (eCPRI). In particular, a plurality of radio units 521 may be connected across a plurality of stages in a cascade manner to one hierarchical division unit 521 .

According to an embodiment of the present invention, in the case of the 4G repeater 420, a time delay is set including a system delay and a wide section including the donor unit 421 and the remote 422. In addition, when the time delay of the 4G repeater 420 is input as an offset, the total time delay from the data unit 411 to the remote 422, that is, the 4G repeater 420 in the end-to-end time delay ) of the time delay is subtracted, the time delay of the 4G base station 410 is set. The time delay of the 4G base station 410 means a time delay from the data unit 411 to the matching unit 412 .

In the embodiment of the present invention, it is assumed that the end-to-end time delay is 120 us. As an example, looking at the first case C1 of FIG. 3 , when the time delay of the 4G repeater 420 is set to 40us (optical section time delay 30/6km + system time delay 10us) (C11), the 4G base station 410 ) is 80us by subtracting the time delay of 40us of the 4G repeater 420 from the end-to-end time delay of 120us (C12). As another example, looking at the second case C2 of FIG. 3 , when the time delay of the 4G repeater 420 is set to 60 us (C21), the time delay of the 4G base station 410 is end-to-end It becomes 60us by subtracting the time delay of 60us of the 4G repeater 420 from the time delay 120us (C22).

According to an embodiment of the present invention, the end-to-end time delay of the 5G network is set according to the end-to-end time delay of the 4G network having the same service coverage. To this end, the 5G base station management apparatus 500 stores a list of 4G base stations 410 having the same service coverage as the 5G base station 510 in the database. Accordingly, the 5G base station management apparatus 500 detects a matching target 4G base station 410 having the same service coverage as the 5G base station 510 in the database when the 5G network is initially installed.

Then, the 5G base station management device 500 from the 4G base station management device 400 corresponding to the detected 4G base station 410, the 4G repeater 420 connected to the detected 4G base station 410 The set time delay It can be sent periodically. Accordingly, the 5G base station management device 500 detects a time delay of the 4G repeater 420 from the 4G base station management device 400 of the detected 4G base station 410 . Thereafter, the detected time delay of the 4G repeater 420 is provided to the transmission unit 511 of the 5G base station 510 . Then, the transfer unit 511 subtracts the time delay of the 4G repeater 420 from the end-to-end time delay, and the 5G base station 510 including the transfer unit 511 and the layer division unit 512 . ) to set the time delay.

For example, when the time delay of the 4G repeater 420 is 60 us as in the case of the second case C2 of FIG. 3 , the transfer unit 511 is the 4G repeater at the end-to-end time delay of 120 us. By subtracting the time delay 60us of 420, the time delay of the 5G base station 510 including the transmission unit 511 and the layer division unit 512 may be calculated as 60 us (C23).

The transmitter 511 may calculate the time delay of the 5G repeater 520 by subtracting the time delay of the 5G base station 410 from the end-to-end time delay. For example, when the time delay of the 5G base station 510 is 60 us as in the case of the second case C2 of FIG. 3, the transfer unit 511 transmits the 5G base station at an end-to-end time delay of 120 us. The time delay of the 5G repeater 520 may be calculated as 60us by subtracting the time delay of 60us of (510) (C24).

However, the 5G repeater 520 measures the time delay of the optical section of the 5G repeater 520 and transmits it to the transmitter 511 . In particular, as shown in FIG. 4 , when the 5G repeater 520 is connected to a plurality of radio units 521 in a cascade form, the 5G repeater 520 provides the light between the nodes of the plurality of radio units 521 and the nodes. The time delay of the section OS may be measured and transmitted to the transmitting unit 511 . In this way, when the 5G repeater 520 measures the time delay of the optical section of the 5G repeater 520 and transmits it to the transmitting unit 511, the 5G base station 510 in the end-to-end time delay The time delay of the 5G repeater 520 is calculated by subtracting the time delay, and the time delay of the optical section (OS) between the node and the node of the 5G repeater 520 is compared with the time delay of the 4G repeater 420 for 5G A time delay of the repeater 520 is set. That is, the delivery unit 511 sets the time delay of the 5G repeater 520 to match the time delay of the 4G repeater 420, but sets the time delay of the 5G repeater 520 to the system time delay in the 4G repeater 420. It can be set as the time delay of the 5G repeater 520 by subtracting it.

In addition, the transmitting unit 511 sets the time delay of the 5G repeater 520 to match the time delay of the 4G repeater 420, but the time delay of the optical section (OS) of the 5G repeater 520 is the 5G repeater 520 ) can be adjusted so that the time delay of the measured optical section (OS) is greater than or equal to the time delay of the system.

Next, a method for setting a time delay for coverage matching of in-building repeater equipment according to an embodiment of the present invention will be described. 5 is a flowchart illustrating a method for setting a time delay for coverage matching of in-building repeater equipment according to an embodiment of the present invention.

5, after the time delay of the 4G repeater 420 is set, including the optical section and system delay including the donor unit 421 and the remote 422, end-to-end time delay of the 4G network It is assumed that the time delay of the 4G repeater 420 is subtracted from and the time delay of the 4G base station 410 is set. For example, in the embodiment of Figure 5, as in the second case (C2) of Figure 3, the end-to-end time delay is 120 us, the time delay of the 4G repeater 420 is 60 us (C21) , the time delay of the 4G base station 410 may be 60 us (C22).

The 5G base station management device 500 stores a list of 4G base stations 410 having the same service coverage as the 5G base station 510 in the database. Accordingly, the 5G base station management device 500 detects a matching target 4G base station 410 having the same service coverage as the 5G base station 510 from the database in step S110 when the 5G network is initially installed.

Then, the 5G base station management apparatus 500 detects a time delay of the 4G repeater 420 from the 4G base station management apparatus 400 of the 4G base station 410 detected in step S120, and the detected 4G repeater 420 of the The time delay is provided to the transfer unit 511 of the 5G base station 510 .

Then, the transfer unit 511 subtracts the time delay of the 4G repeater 420 from the end-to-end time delay in step S130 to 5G including the transfer unit 511 and the layer division unit 512 . A time delay of the base station 510 is set. For example, when the time delay of the 4G repeater 420 is 60 us as in the case of the second case C2 of FIG. 3 , the transfer unit 511 is the 4G repeater at the end-to-end time delay of 120 us. By subtracting the time delay 60us of 420, the time delay of the 5G base station 510 including the transmission unit 511 and the layer division unit 512 may be calculated as 60 us (C23).

The transmission unit 511 receives the time delay of the optical section measured by the 5G repeater 520 from the 5G repeater 520 in step S140, and the time of the 5G base station 510 in the end-to-end time delay. The time delay of the 5G repeater 520 is calculated by subtracting the delay, but the time delay of the optical section (OS) between the node and the node of the 5G repeater 520 is compared with the time delay of the 4G repeater 420 to the 5G repeater Set a time delay of 520. The transmitter 511 may calculate the time delay of the 5G repeater 520 by subtracting the time delay of the 5G base station 410 from the end-to-end time delay. For example, when the time delay of the 5G base station 510 is 60 us as in the case of the second case C2 of FIG. 3, the transfer unit 511 transmits the 5G base station at an end-to-end time delay of 120 us. The time delay of the 5G repeater 520 may be calculated as 60us by subtracting the time delay of 60us of (510) (C24). In addition, the delivery unit 511 sets the time delay of the 5G repeater 520 to match the time delay of the 4G repeater 420, but sets the time delay of the 5G repeater 520 to the system time delay in the 4G repeater 420. Except, it can be set as the time delay of the 5G repeater.

Meanwhile, the method according to an embodiment of the present invention may be provided in the form of a computer-readable medium suitable for storing computer program instructions and data. Such a computer-readable recording medium may include program instructions, data files, data structures, etc. alone or in combination, and includes all types of recording devices in which data readable by a computer system is stored. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, compact disk read only memory (CD-ROM), and optical recording media such as DVD (Digital Video Disk). Stores program instructions such as Magneto-Optical Media, ROM (Read Only Memory), RAM (Random Access Memory), Flash memory, etc. and hardware devices specially configured to perform In addition, the computer-readable recording medium is distributed in a computer system connected to a network, so that the computer-readable code can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the present invention can be easily inferred by programmers in the technical field to which the present invention pertains.

Although described and illustrated in relation to a preferred embodiment for illustrating the technical idea of the present invention above, the present invention is not limited to the configuration and operation as shown and described as such, and without departing from the scope of the technical idea. It will be apparent to those skilled in the art that many changes and modifications to the present invention are possible. Accordingly, all such suitable alterations and modifications and equivalents are to be considered as being within the scope of the present invention.

Due to the structure of the in-building service, significant time and manpower is invested to ensure that 4G and 5G coverage are consistent everywhere in the in-building service area. However, the time delay setting device for coverage matching of in-building repeater equipment according to the present invention can match 5G coverage corresponding to 4G coverage by automatically setting a time delay, thereby shortening the time to optimize construction and opening and reducing costs can save The present invention has industrial applicability because it has sufficient potential for marketing or business, as well as to the extent that it can be clearly implemented in reality.

10: terminal 400: 4G base station management device
410: 4G base station 411: data unit
412: matching unit 420: 4G repeater
421: donor unit 422: remote
430: 4G repeater management device 500: 5G base station management device
510: 5G base station 520: 5G repeater
511: forwarding unit 512: hierarchical division unit
520: 5G repeater 521: radio unit
530: 5G repeater management device 600: core device

Claims (5)

a 5G base station management device for detecting a time delay of a 4G repeater from a 4G base station management device of a matching target 4G base station; and
the transfer unit for setting a time delay of a 5G base station including a transfer unit and a hierarchical division unit by subtracting a time delay of the 4G repeater from an end-to-end time delay;
characterized in that it comprises
Device for setting time delay. The method of claim 1,
the delivery unit
The time delay of the 5G repeater is calculated by subtracting the time delay of the 5G base station from the end-to-end time delay.
Device for setting time delay. 3. The method of claim 2,
The 5G repeater
Measure the time delay of the optical section between the nodes and the nodes of the plurality of radio units of the 5G repeater and transmit it to the transmitting unit,
the delivery unit
The time delay of the 5G repeater is calculated by subtracting the time delay of the 5G base station from the end-to-end time delay, the time delay of the optical section between the node of the 5G repeater and the node, and the 4G repeater Comparing with the time delay of the 4G repeater, the system time delay is subtracted from the time delay of the 4G repeater and set as the time delay of the 5G repeater.
Device for setting time delay. The method of claim 1,
The 5G base station management device is
A list of 4G base stations having the same service coverage as the 5G base station is stored in a database, and when the 5G network is initially installed, the matching target 4G base station having the same service coverage as the 5G base station is detected in the database, characterized in that
Device for setting time delay. 5. The method of claim 4,
The 5G base station management device is
Characterized in that periodically receiving a time delay set for the 4G repeater connected to the detected 4G base station from the 4G base station management device corresponding to the detected 4G base station
Device for setting time delay.

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