KR102274801B1 - Base Station Operating Method For optimization Of Wireless Network And Base Station of Thereof - Google Patents

Abstract

The following embodiment relates to a method of operating a base station for optimizing a radio network and the base station. An operating method of a base station according to an embodiment includes: determining the number of divided areas of coverage of the base station and the maximum number of synchronization signal blocks (SSBs) to be used in each of the divided areas; determining, in a base station, a feedback period for a movement speed for at least one terminal; calculating an average moving speed of at least one terminal for each divided area based on the moving speed of at least one terminal; and adjusting the maximum number of SSBs to be used in each of the divided regions based on the average moving speed.

Description

Base Station Operating Method For optimization Of Wireless Network And Base Station of Thereof

The following embodiment relates to a method of operating a base station for radio network optimization and a base station performing the same.

5G is the next-generation communication technology following the 4th generation LTE-Advanced. 5G mobile communication has a maximum transmission speed of 1 gigabit per second (Gbps). 5G is essential for transmitting large amounts of data such as ultra-high-definition images, 3D stereoscopic images, 360-degree videos, and holograms.

When the terminal synchronizes in the 5G cell, it reads the synchronization signal block (SSB) of the base station. If the base station uses multiple beams, multiple SSBs are used according to the number of beams. As the number of SSBs increases, the beam width of each SSB becomes smaller, but coverage becomes longer.

The process of cell synchronization in a general 5G network is as follows. The terminal transmits the strength of the base station signal at regular intervals, and based on this, the base station adjusts the data transmission rate. The base station transmits all SSBs through a beam sweep for 5ms every 20ms period, and the terminal measures all the SSBs and performs a random access channel (RACH) with the index information of the SSB with the highest signal strength. Start. When the network access procedure is successfully performed, the UE may acquire cell synchronization.

The number of SSBs used by the base station should be fixed. When a large number of SSBs is allocated, there is an advantage in coverage, but there is a disadvantage in that the beam width is small. In the case where the mobile speed of the terminal is high, the SSB having the best signal strength may be changed before all SSBs are read. Therefore, when the movement speed of the terminals varies according to time within the coverage, it is difficult to optimize the wireless network in a communication environment in which the number of SSBs must be used in a fixed manner.

In an embodiment, an object of the present invention is to provide a method of optimizing a wireless network of a 5G network by using information on a movement speed of a terminal fed back by the terminal in order to increase the user's 5G use quality.

A method of operating a base station, comprising: determining the number of divided areas of coverage of the base station and the maximum number of synchronization signal blocks (SSBs) to be used in each of the divided areas; determining, in the base station, a feedback period for a movement speed for at least one terminal; calculating an average moving speed of the at least one terminal for each divided area based on the moving speed of the at least one terminal; and adjusting the maximum number of SSBs to be used in each of the divided regions based on the average moving speed.

The determining of the number of partitioned areas of coverage of the base station and the maximum number of SSBs to be used in each of the partitioned areas may include referring to the total number of usable SSBs specified in the 3GPP standard according to the frequency range of the base station for each of the partitioned areas. It may include the step of determining the number of the maximum SSB to be used.

The calculating of the average moving speed of the at least one terminal for each divided area may include: receiving a real-time moving speed of the at least one terminal as feedback for each feedback period; and calculating an average moving speed of the at least one terminal for each divided area based on the fed back moving speed.

The step of adjusting the number of maximum SSBs to be used in each of the divided areas based on the average moving speed may include reducing the number of the maximum SSBs when the average moving speed in the first divided area is higher than a reference speed. can

The step of adjusting the number of maximum SSBs to be used in each of the divided areas based on the average moving speed may include increasing the number of the maximum SSBs when the average moving speed is higher than a reference speed in the second divided area. can

The step of adjusting the maximum number of SSBs to be used in each of the divided regions based on the average moving speed includes: determining a minimum value of SSBs allocated to a region in which a terminal having a signal strength equal to or less than a predetermined value exists among the divided regions may include.

The partition area and the SSB allocated to the partition area may be indexed and managed.

According to an embodiment of the present invention, it is possible to provide a method of optimizing a wireless network of a 5G network by using information on the movement speed of the terminal fed back by the terminal in order to improve the quality of 5G use by the user.

In detail, it is possible to obtain a high effect of optimizing the wireless network in an environment in which the moving speed of the terminal varies according to time (for example, in the vicinity of the road, the vehicle speed is slow during commuting time and fast at night), Since the moving speed environment may be different, the wireless network optimization may be performed for each area by dividing the coverage within the base station into a plurality of areas.

1 is a flowchart of a method of operating a base station for radio network optimization according to an embodiment.
2 is a flowchart of a method of adjusting the maximum number of SSBs to be used in each partitioned area according to an embodiment.
3 is a diagram for explaining an example in which a base station divides a region and allocates an SSB, according to an embodiment.
4 is a block diagram illustrating a configuration of a base station for optimizing a radio network according to an embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Specific structural or functional descriptions disclosed in this specification are merely illustrative for the purpose of describing embodiments according to technical concepts, and the embodiments may be embodied in various other forms and are limited to the embodiments described herein. doesn't happen

Terms such as first or second may be used to describe various elements, but these terms should be understood only for the purpose of distinguishing one element from another element. For example, a first component may be termed a second component, and similarly, a second component may also be termed a first component.

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. Expressions describing the relationship between elements, for example, “between” and “between” or “neighboring to” and “directly adjacent to”, etc. should be interpreted similarly.

The singular expression includes the plural expression unless the context clearly dictates otherwise. In this specification, terms such as "comprise" or "have" are intended to designate that the described feature, number, step, operation, component, part, or combination thereof exists, and includes one or more other features or numbers, It should be understood that the possibility of the presence or addition of steps, operations, components, parts or combinations thereof is not precluded in advance.

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. 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 specification. does not

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Like reference numerals in each figure indicate like elements.

1 is a flowchart of a method of operating a base station for radio network optimization according to an embodiment.

The method to be described below is a method of dividing the coverage of the base station and adjusting the number of Synchronization Signal Blocks (SSBs) used in the corresponding area based on the movement speed information fed back by the terminal for each area.

In step 110, the base station determines the number of divided areas of the coverage of the base station and the maximum number of SSBs to be used in each of the divided areas.

The embodiment of the present invention is the same in all of the NSA (Non-Standalone), SA (Standalone) network structure or the frequency range of FR1 (Frequency Range 1, meaning less than 6 GHz), FR2 (Frequency Range 2, meaning 24 GHz or more) It works.

In an embodiment, the maximum number of SSBs to be used in each of the divided regions may be determined by referring to the total number of usable SSBs specified in the 3GPP standard according to the frequency range of the base station. In the network network according to the embodiment, a maximum of 8 SSBs for FR1 and a maximum of 64 SSBs for FR2 may be used. For example, in the case of FR1, the coverage may be divided into four areas, and the maximum number of SSBs to be used in each coverage may be divided into two.

In step 120, the base station determines a feedback period for the movement speed for at least one terminal in the base station.

In an embodiment, the movement speed may be fed back to the terminal existing within the coverage of the base station at a predetermined period during cell synchronization. Accordingly, the terminal may transmit the movement speed of the terminal within the base station for each feedback period. For each of the terminals included in the coverage of the base station, the movement speed may be fed back.

In step 130, the base station calculates the average moving speed of at least one terminal for each partitioned area based on the moving speed of the at least one terminal.

In an embodiment, when real-time movement speeds for terminals within coverage are fed back for each feedback period, the average movement speed may be calculated using the movement speeds fed back from terminals existing corresponding to each of the areas in which coverage is divided. For example, calculating the average moving speed with respect to the moving speed of the terminals fed back from the terminals in the area 1, calculating the average moving speed with respect to the moving speed of the terminals fed back from the terminals in the area 2, etc. The average moving speed can be calculated for the area.

In step 140, the base station adjusts the maximum number of SSBs to be used in each of the divided regions based on the average moving speed.

In an embodiment, the number of SSBs may be adjusted for each region, such as reducing the number of SSBs for a region having a high average moving speed and increasing the number of SSBs for a region having a slow average moving speed.

An embodiment of adjusting the number of SSBs in each of the divided regions will be described in detail with reference to FIG. 2 .

2 is a flowchart of a method of adjusting the maximum number of SSBs to be used in each partitioned area according to an embodiment.

In step 141, the base station may confirm the start of the adjustment of the number of SSBs.

In an embodiment, if the control of the number of SSBs is not started, the base station may return to step 130 to collect the movement speed of the terminal and calculate the average movement speed, and when starting to adjust the number of SSBs, the number of SSBs may be adjusted for each area. have.

In step 142, an initial value of n may be set to 1.

In an embodiment, the area obtained by dividing the coverage may be managed by being indexed by a number from 1 to n, such as area 1, area 2, and the like. The method of adjusting the number of SSBs according to the embodiment may start from area 1 and be extended to area n.

In step 143, it may be checked whether the value of n is less than or equal to the total number of regions.

In an embodiment, the number of SSBs can be adjusted only for the indexed regions from region 1 to region n.

In step 144, the base station may adjust the number of SSBs to be used in area n.

As described above, it is possible to reduce the number of SSBs in an area where the average moving speed of the terminal is high and increase the number of SSBs in an area in which the average moving speed of the terminal is slow.

In this step, the number of SSBs to be used in area n may be adjusted.

In an embodiment, in order to adjust the number of SSBs, it may be determined whether the average moving speed is fast by using a reference speed for determining whether the average moving speed of the terminal is fast or slow in the corresponding region. For example, the reference speed may correspond to the overall average moving speed of all terminals within the coverage of the base station. By designating a speed section for allocating the SSB based on the overall average moving speed, the SSB can be additionally allocated or the number of allocated SSBs can be reduced in response to the speed section to which the average moving speed of the corresponding region belongs. As an example, when using the overall average moving speed, the variance of the moving speed of the terminal may be used to designate a speed section.

In another embodiment, since the maximum number of SSBs that can be allocated by the base station is predetermined, the minimum SSB is allocated to each region to adjust the number of SSBs, and the remaining SSBs can be additionally allocated in response to the average moving speed. have. For example, the number of SSBs to be added may be set in response to the average movement speed of each area using the average and variance of the movement speeds of all terminals within the coverage of the base station.

In step 145, the base station checks whether there is a terminal with an _{RSRP threshold} , and if there is, it can check whether _{N SSB,n} < N _SSB,n,min.

In an embodiment, the RSRP _threshold means a reference signal strength at which the terminal is considered to be in a weak electric field, and is a term used in 3GPP. N _SSB,n is the number of SSBs used in area n, and N _SSB,n,min means the minimum number of SSBs used when there is a terminal in a weak electric field in area n.

In other words, the minimum value of the SSB allocated to an area in which a terminal having a signal strength equal to or less than a predetermined value exists may be preset, and when there is a terminal in a weak electric field in the area n, the number of SSBs allocated to the area n is If n is less than the _{SSB, n, min,} it can be set to a number that is assigned to the area SSB n in step 146, the _{SSB n, n, min.}

If, in step 145, there is no terminal in the weak electric field within the region n, or even if there is, the number of SSBs allocated to the region n is _{not less than N SSB,n,min} , the adjustment of the number of SSBs for the region n may be terminated. .

In step 147, the base station performs n+1 to adjust the number of SSBs for the region n+1.

In this way, the number of SSBs can be adjusted for all areas within the base station, and when n exceeds the total number of areas within the base station in step 143, since the number of SSBs for all areas within the base station has been adjusted, the number of SSBs of the base station is adjusted can be terminated.

3 is a diagram for explaining an example in which a base station divides a region and allocates an SSB, according to an embodiment.

In the embodiment, Fig. 3 (a) relates to an embodiment in which the base station divides the coverage into four regions, and Fig. 3 (b) relates to an embodiment in which the number of SSBs for each region is adjusted.

In an embodiment, to which region the terminal belongs, the SSB used for communication with the terminal may be distinguished by an index. For example, if SSB index1 and SSB index2 are being serviced in area 1, and the terminal is using a beam of SSB index1 to communicate with the base station, the base station can know that the terminal is in area 1. Numbers may be indexed in the order of 1 or less in order from the SSB allocated to region 1.

As shown in FIG. 3( a ), coverage of a base station can be uniformly divided into n areas. In an embodiment, the number of regions may be determined by taking into account the maximum usable number of SSBs depending on whether the range is FR1 or FR2.

According to the adjustment of the number of SSBs according to an embodiment, the number of SSBs may be determined as in the embodiment of FIG. 3( b ).

In an embodiment, the number of SSBs in each region may be adjusted based on the average moving speed of the terminal in regions 1 to 4, and if a base station covering a highway is described as an example, regions 2 and 4 have smooth communication. It may correspond to a section, and region 3 may correspond to a bottleneck section in which a vehicle is blocked.

As shown, when the number of SSBs is small, the beam width per SSB is widened in the corresponding area, and when the number of SSBs is large, the coverage length becomes longer instead of the beam width per SSB becomes narrow in the corresponding area.

4 is a block diagram illustrating a configuration of a base station for optimizing a radio network according to an embodiment.

In an embodiment, the base station 400 may include a memory 410 and a processor 420 , and a program for optimizing a wireless network may be stored in the memory 410 and executed by the processor 420 .

The base station 400 determines the number of divided areas of coverage of the base station 400 and the maximum number of SSBs to be used in each of the divided areas.

In an embodiment, the maximum number of SSBs to be used in each of the divided regions may be determined by referring to the total number of usable SSBs specified in the 3GPP standard according to the frequency range of the base station 400 . In the network network according to the embodiment, a maximum of 8 SSBs for FR1 and a maximum of 64 SSBs for FR2 may be used. For example, in the case of FR1, the coverage may be divided into four areas, and the maximum number of SSBs to be used in each coverage may be divided into two.

The base station 400 determines a feedback period for the movement speed for at least one terminal in the base station 400 .

In an embodiment, a movement speed may be fed back to a terminal existing within the coverage of the base station 400 at a predetermined period during cell synchronization. Accordingly, the terminal may transmit the movement speed of the terminal within the base station 400 for each feedback period. For each of the terminals included in the coverage of the base station 400, the movement speed may be fed back.

The base station 400 calculates an average moving speed of at least one terminal for each division based on the moving speed of the at least one terminal.

In the embodiment, upon receiving feedback on the real-time movement speed of the terminals within the coverage for each feedback period, the base station 400 calculates the average movement speed by using the movement speed fed back from the terminals existing corresponding to each of the areas in which the coverage is divided. can be calculated For example, calculating the average moving speed with respect to the moving speed of the terminals fed back from the terminals in the area 1, calculating the average moving speed with respect to the moving speed of the terminals fed back from the terminals in the area 2, etc. We can calculate the average moving speed for the area.

The base station 400 adjusts the maximum number of SSBs to be used in each of the divided areas based on the average moving speed.

In an embodiment, the number of SSBs may be adjusted for each region, such as reducing the number of SSBs for a region having a high average moving speed and increasing the number of SSBs for a region having a slow average moving speed.

For a method of adjusting the number of SSBs in each of the divided regions, reference may be made to the description of FIG. 2 .

The embodiments described above may be implemented by a hardware component, a software component, and/or a combination of a hardware component and a software component. For example, the apparatus, methods and components described in the embodiments may include, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate (FPGA) array), a programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For convenience of understanding, although one processing device is sometimes described as being used, one of ordinary skill in the art will recognize that the processing device includes a plurality of processing elements and/or a plurality of types of processing elements. It can be seen that can include For example, the processing device may include a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as parallel processors.

The software may comprise a computer program, code, instructions, or a combination of one or more thereof, which configures a processing device to operate as desired or is independently or collectively processed You can command the device. The software and/or data may be any kind of machine, component, physical device, virtual equipment, computer storage medium or device, to be interpreted by or to provide instructions or data to the processing device. , or may be permanently or temporarily embody in a transmitted signal wave. The software may be distributed over networked computer systems, and stored or executed in a distributed manner. Software and data may be stored in one or more computer-readable recording media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiment, or may be known and available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic such as floppy disks. - includes magneto-optical media, and hardware devices specially configured to store and execute 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 devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

As described above, although the embodiments have been described with reference to the limited drawings, those skilled in the art may apply various technical modifications and variations based on the above. For example, the described techniques are performed in a different order than the described method, and/or the described components of the system, structure, apparatus, circuit, etc. are combined or combined in a different form than the described method, or other components Or substituted or substituted by equivalents may achieve an appropriate result.

Claims (15)

In the operating method of the base station,
determining the number of divided areas of coverage of the base station and the maximum number of synchronization signal blocks (SSBs) to be used in each of the divided areas;
receiving, in the base station, feedback on a movement speed of at least one terminal;
calculating an average moving speed of the at least one terminal for each divided area based on the moving speed of the at least one terminal; and
adjusting the number of SSBs to be used in each of the divided areas based on the average moving speed
including,
Calculating the average moving speed of the at least one terminal for each divided area comprises:
receiving feedback on the real-time movement speed of the at least one terminal for each feedback period; and
calculating an average moving speed of the at least one terminal for each divided area based on the fed back moving speed
including,
When the average moving speed of the first divided area is faster than the average moving speed of the second divided area, the number of SSBs of the first divided area is determined to be less than the number of SSBs of the second divided area;
How the base station works.
According to claim 1,
The step of determining the number of divided areas of coverage of the base station and the number of SSBs to be used in each of the divided areas comprises:
Determining the number of SSBs to be used in each of the divided regions by referring to the total number of usable SSBs specified in the 3GPP standard according to the frequency range of the base station
containing,
How the base station works.
delete delete According to claim 1,
Adjusting the number of SSBs to be used in each of the divided areas based on the average moving speed comprises:
increasing the number of SSBs when the average moving speed is slower than the reference speed in the second divided area
containing,
How the base station works.
According to claim 1,
Adjusting the number of SSBs to be used in each of the divided areas based on the average moving speed comprises:
Determining a minimum value of an SSB allocated to a region in which a terminal having a signal strength equal to or less than a predetermined value exists among the divided regions
containing,
How the base station works.
According to claim 1,
The partition area and the SSB allocated to the partition area are indexed and managed,
How the base station works.
A computer program stored in a medium for executing the method of any one of claims 1, 2 and 5 to 7 in combination with hardware.
In the base station for radio network optimization,
one or more processors;
Memory; and
one or more programs stored in the memory and configured to be executed by the one or more processors;
The program is
determining the number of divided areas of coverage of the base station and the maximum number of SSBs to be used in each of the divided areas;
receiving feedback on a movement speed for at least one terminal in the base station;
calculating an average moving speed of the at least one terminal for each divided area based on the moving speed of the at least one terminal; and
adjusting the number of SSBs to be used in each of the divided areas based on the average moving speed
run
Calculating the average moving speed of the at least one terminal for each divided area comprises:
receiving feedback on the real-time movement speed of the at least one terminal for each predetermined feedback period; and
calculating an average moving speed of the at least one terminal for each divided area based on the fed back moving speed
including,
When the average moving speed of the first divided area is faster than the average moving speed of the second divided area, the number of SSBs of the first divided area is determined to be less than the number of SSBs of the second divided area;
base station.
10. The method of claim 9,
In the step of determining the number of divided areas of the coverage of the base station and the number of SSBs to be used in each of the divided areas,
Determining the number of SSBs to be used in each of the divided regions by referring to the total number of usable SSBs specified in the 3GPP standard according to the frequency range of the base station
to run,
base station.
delete delete 10. The method of claim 9,
In the step of adjusting the number of SSBs to be used in each of the divided areas based on the average moving speed,
increasing the number of SSBs when the average moving speed is slower than the reference speed in the second divided area
to run,
base station.
10. The method of claim 9,
In the step of adjusting the number of SSBs to be used in each of the divided areas based on the average moving speed,
Determining a minimum value of an SSB allocated to a region in which a terminal having a signal strength equal to or less than a predetermined value exists among the divided regions
to run,
base station.
10. The method of claim 9,
The partition area and the SSB allocated to the partition area are indexed and managed,
base station.

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