KR102196166B1 - Method and apparatus for operating cell - Google Patents

Abstract

The present invention relates to a cell operating method and a computer-readable recording medium and apparatus. The disclosed cell operation method includes the steps of monitoring the increase or decrease of mobile communication terminals located in a service area in a single cell operating a plurality of frequency bands, and determining whether the number of mobile communication terminals located in the service area satisfies a preset band adjustment condition. And processing a mobile communication terminal using a specific band among the plurality of frequency bands to be handed off to another band when it is determined that the band adjustment condition is satisfied. Therefore, in a single cell operating a plurality of frequency bands, if the number of mobile communication terminals located within the cell coverage is small, such as the maximum time, all mobile communication terminals can be accommodated in a specific frequency band, and no mobile communication terminals are accommodated. There is an advantage in that power consumption can be reduced by turning off the power of a power amplifier mounted in a radio unit of a different frequency band, and deterioration due to a long-term operation of the radio unit can be prevented, thereby extending the service life (life).

Description

Cell operating method and device {METHOD AND APPARATUS FOR OPERATING CELL}

The present invention relates to a cell operating method and apparatus, and more particularly, to a cell operating method for operating a plurality of frequency bands within a single cell, and to a computer-readable recording medium and apparatus.

As is well known, the Evolved Packet Core (EPC) is a set of network nodes for the 3GPP Long Term Evolution (LTE) system, and evolved the core network of the existing 3GPP system architecture, Evolved RAN), E-UTRAN (Evolved-UMTS Terrestrial Radio Access Network) is supported. A wireless communication system including EPC and E-UTRAN may be referred to as an Evolved Packet System (EPS), and the LTE mobile communication system currently in service corresponds to this.

In the standard defined for the LTE mobile communication system, it is defined to use various frequency bands in a frequency of 800MHz to 2.6GHz.

For example, a plurality of frequency bands including an 800 MHz band, a 1.8 GHz band, and a 2.1 GHz band may be operated within a single cell.

On the other hand, only the 800MHz band was operated at the beginning of the service, then the 1.8GHz band and the 2.1GHz band were sequentially added, and if mobile communication terminals supporting the 800MHz band were widely spread, the terminal acceptance rate of the 800MHz band was averaged compared to other bands. Higher as

In addition, looking at one statistic when operating the 800MHz band, 1.8GHz band, and 2.1GHz band within a single cell, the average terminal acceptance rate of each frequency band is over 70% at peak hours, and at the maximum time, each frequency band The acceptance rate is often less than 30% on average.

A base station supporting a plurality of frequency bands according to the prior art includes a single digital unit and a plurality of radio units corresponding to the number of operating frequency bands, and the digital unit includes channels for each frequency band. Cards are mounted, and different frequency bands are operated by different channel cards and radio units.

Each radio unit is equipped with a large-capacity power amplifier for outputting a radio signal, and such a power amplifier has a high output capacity and consumes very large power.

However, at the maximum time, since the acceptance rate of each frequency band is below 30% on average, all mobile communication terminals located within the cell coverage can be accommodated in a specific frequency band (e.g., 800 MHz band), but they are distributed over a plurality of frequency bands. Therefore, power amplifiers in all frequency bands always induce power consumption and thus power is wasted.

Korean Patent Application Publication No. 10-2012-0001154, publication date January 04, 2012.

According to an embodiment of the present invention, when a band adjustment condition is satisfied in a single cell operating a plurality of frequency bands, a cell operating method in which a mobile communication terminal using a specific band is handed off to another band can be read by a computer. Provides a recording medium and device.

The problem to be solved of the present invention is not limited to those mentioned above, and another problem to be solved that is not mentioned will be clearly understood by those of ordinary skill in the art from the following description.

A cell operating method according to an aspect of the present invention includes the steps of monitoring the increase or decrease of mobile communication terminals located within a service area in a single cell operating a plurality of frequency bands, and the number of mobile communication terminals located within the service area. Determining whether a set band adjustment condition is satisfied, and if it is determined that the band adjustment condition is satisfied, processing a mobile communication terminal using a specific band among the plurality of frequency bands to be handed off to another band. have.

As another aspect of the present invention, there is provided a computer-readable recording medium in which a computer program capable of executing the cell operation method described above is stored.

A cell operating apparatus according to another aspect of the present invention includes a cell monitoring unit that monitors an increase or decrease of a mobile communication terminal located in a service area in a single cell operating a plurality of frequency bands, and the mobile communication terminal located in the service area. A condition determination unit that determines whether the number satisfies a preset band adjustment condition, and when it is determined that the band adjustment condition is satisfied, processes a mobile communication terminal using a specific band among the plurality of frequency bands to be handed off to another band. It may include a band adjustment processing unit.

According to an embodiment of the present invention, when a band adjustment condition is satisfied in a single cell operating a plurality of frequency bands, a mobile communication terminal using a specific band is handed off to another band.

Therefore, when the number of mobile communication terminals located within the cell coverage is small, such as the maximum time, all mobile communication terminals can be accommodated in a specific frequency band (eg, 800 MHz band).

Therefore, it is possible to reduce power consumption by turning off the power of the power amplifier mounted in the radio unit of the other frequency band where the mobile communication terminal is not accommodated, and to prevent deterioration due to the long-term operation of the radio unit to extend the service time (life). It can have an effect.

1 is a block diagram of a cell operating apparatus according to an embodiment of the present invention.
2 is a flowchart illustrating a cell operating method performed by a cell operating apparatus according to an embodiment of the present invention.
3 is a graph showing a change in output of a radio signal in a specific band with a change in time by a cell operating method according to an embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and are common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims.

In describing the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in an embodiment of the present invention, which may vary according to the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout this specification.

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

1 is a block diagram of a cell operating apparatus according to an embodiment of the present invention.

As shown, the cell operating apparatus 100 according to the embodiment includes a cell monitoring unit 110, a condition determining unit 120, a band adjustment processing unit 130, and the like.

The cell monitoring unit 110 monitors the increase or decrease of mobile communication terminals located within a service area in a single cell operating a plurality of frequency bands. For example, if the cell monitoring unit 110 operates the 800MHz band, 1.8GHz band, and 2.1GHz band within a single cell, the number of mobile communication terminals accommodated in different channel cards and radio units corresponding to each frequency band Each can be monitored.

The condition determination unit 120 determines whether the number of mobile communication terminals located in the service area satisfies a preset band adjustment condition. For example, if the condition determination unit 120 operates the 800 MHz band, the 1.8 GHz band, and the 2.1 GHz band within a single cell, the channel card and the radio unit operating one of the bands determine the mobile communication terminal using the other band. It can be determined whether all additionally acceptable band adjustment conditions are satisfied.

When the condition determination unit 120 determines that the band adjustment condition is satisfied, the band adjustment processing unit 130 processes a mobile communication terminal using a specific band among a plurality of frequency bands to be handed off to another band. For example, if the band adjustment processing unit 130 operates the 800MHz band, the 1.8GHz band, and the 2.1GHz band within a single cell, the handoff condition between bands is relaxed or the radio signal is output from a radio unit operating a specific band. You can progressively decrease or turn off the output.

In addition, the band adjustment processing unit 130 may turn on the output of a radio signal in a specific band according to a result of comparing the uplink signal level received from a mobile communication terminal using a specific band in another cell with a preset threshold. . For example, when an uplink signal level received from a mobile communication terminal using a specific band in another cell exceeds a preset threshold, the radio unit operating the specific band may turn on the output.

2 is a flowchart illustrating a cell operating method performed by a cell operating apparatus according to an embodiment of the present invention.

As shown, the cell operating method according to the embodiment includes a step (S201) of monitoring an increase or decrease of a mobile communication terminal located in a service area in a single cell operating a plurality of frequency bands.

Subsequently, the step of determining whether the number of mobile communication terminals located in the service area of the single cell satisfies a preset band adjustment condition (S203) is further included.

And, if it is determined in step S203 that the band adjustment condition is satisfied, the mobile communication terminal using a specific band among the plurality of frequency bands is processed to be handed off to another band, thereby turning off the output of the radio signal in the specific band (S205 And S207).

In addition, steps (S209 to S213) of performing output-on processing of a radio signal in a specific band according to a result of comparing the uplink signal level received from a mobile communication terminal using a specific band in another cell with a preset threshold value are further performed. Include.

Hereinafter, a cell operating method performed by the cell operating apparatus according to the present embodiment will be described in more detail with reference to FIGS. 1 to 3.

First, the cell monitoring unit 110 of the cell operating apparatus 100 monitors the increase or decrease of a mobile communication terminal located within a service area in a single cell operating a plurality of frequency bands.

For example, a base station operating an 800MHz band, a 1.8GHz band, and a 2.1GHz band within a single cell includes a single digital unit and three radio units, and the digital unit is equipped with a channel card for each frequency band, and different frequency bands Can be operated by different channel cards and radio units. In this case, the cell monitoring unit 110 may monitor the increase or decrease of mobile communication terminals for each frequency band by real-time grasping the number of mobile communication terminals accommodated for each radio unit (S201).

In addition, the condition determination unit 120 of the cell operating apparatus 100 determines whether the number of mobile communication terminals located within the service area of a single cell satisfies a preset band adjustment condition.

For example, it is possible to determine whether a band adjustment condition for additionally accommodating both a channel card and a radio unit operating in one of a plurality of frequency bands and a mobile communication terminal using another band is satisfied. The number of mobile communication terminals each accommodated in the channel cards and radio units operating 800MHz band, 1.8GHz band, and 2.1GHz band is small, such as the time limit, so that channel cards and radio units operating 800MHz band can perform all mobile communication terminals. It can be said that the possible case is when a preset band adjustment condition is satisfied. Alternatively, if the channel card and radio unit operating the 800MHz band and the channel card and radio unit operating the 1.8GHz band can be divided into a mobile communication terminal that used the 2.1GHz band, satisfying the preset band adjustment conditions. It may be said that it is time (S203).

Next, when the band adjustment processing unit 130 of the cell operating apparatus 100 determines that the band adjustment condition is satisfied by the condition determination unit 120, the mobile communication terminal using a specific band among the plurality of frequency bands is transferred to another band. Process to be hand-off (S205).

Here, if the band adjustment processing unit 130 operates the 800MHz band, the 1.8GHz band, and the 2.1GHz band within a single cell, the handoff condition between the bands is relaxed or the 1.8GHz band and/or the 2.1GHz band is being operated. In the radio unit, the output of the radio signal may be gradually decreased or the output may be turned off (S207).

To this end, the band adjustment processing unit 130 may adjust the value of the inter-band handoff parameter so that the soft handoff transition between the bands is more easily performed. In addition, the output of the power amplifier mounted in the radio unit corresponding to the 1.8 GHz band and the 2.1 GHz band is gradually reduced, so that the output can be eventually turned off. Here, the reason for gradually decreasing the output of the power amplifier is that if the output of the power amplifier is sharply dropped, a call drop occurs, or a large number of mobile communication terminals perform a radio re-establishment, resulting in a network load. This is because it can increase instantly.

As shown in the graph of FIG. 3, if the output of the radio signal is gradually decreased starting from time 1 (t1) in a specific band, soft handoff of mobile communication terminals located at a distance from the radio unit starts from time 2 (t2), Since the soft handoff of mobile communication terminals located in a short distance from the radio unit starts from time 3 (t3), a call drop does not occur and the network load is not instantaneously increased.

In this way, in the state in which the output of the radio signal corresponding to the specific band is turned off, the band adjustment processing unit 130 receives the uplink signal from the mobile communication terminal that used the specific band in another cell (S209), and the received uplink The signal level and a preset threshold are compared (S211).

In addition, if the uplink signal level received in step S209 exceeds a preset threshold, the output of the radio signal is turned on in a specific band of the cell that has been turned off in step S207 to perform hard handoff.

For example, if the output of the radio signal is turned off in the radio unit operating the 2.1 GHz band in step S207, in step S207, the output of the power amplifier mounted in the radio unit operating the 2.1 GHz band is turned on and the corresponding channel card and The radio unit again accommodates the mobile communication terminal (S213).

As described so far, according to an embodiment of the present invention, when the number of mobile communication terminals located within cell coverage is small, such as a maximum time, all mobile communication terminals are handed off to other bands. The terminal can be accommodated in a specific frequency band.

Therefore, it is possible to reduce power consumption by turning off the power of the power amplifier mounted in the radio unit of the other frequency band where the mobile communication terminal is not accommodated, and to prevent deterioration due to the long-term operation of the radio unit to extend the service time (life). I can.

Combinations of each block in the block diagram attached to the present specification and each step in the flowchart may be performed by computer program instructions. Since these computer program instructions can be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, the instructions executed by the processor of the computer or other programmable data processing equipment are shown in each block or flow chart of the block diagram. Each step creates a means to perform the functions described. These computer program instructions can also be stored in computer-usable or computer-readable memory that can be directed to a computer or other programmable data processing equipment to implement a function in a particular way, so that the computer-usable or computer-readable memory It is also possible to produce an article of manufacture in which the instructions stored in the block diagram contain instruction means for performing the functions described in each block or flow chart. Computer program instructions can also be mounted on a computer or other programmable data processing equipment, so that a series of operating steps are performed on a computer or other programmable data processing equipment to create a computer-executable process to create a computer or other programmable data processing equipment. It is also possible for the instructions to perform the processing equipment to provide steps for performing the functions described in each block of the block diagram and each step of the flowchart.

In addition, each block or each step may represent a module, segment, or part of code comprising one or more executable instructions for executing the specified logical function(s). In addition, it should be noted that in some alternative embodiments, functions mentioned in blocks or steps may occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially simultaneously, or the blocks or steps may sometimes be performed in the reverse order depending on the corresponding function.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

According to an embodiment of the present invention, in a single cell operating a plurality of frequency bands, when the number of mobile communication terminals located within a cell coverage is small, such as a limited time, all mobile communication terminals can accommodate a specific frequency band.

Therefore, it is possible to reduce power consumption by turning off the power of the power amplifier mounted in the radio unit of the other frequency band where the mobile communication terminal is not accommodated, and to prevent deterioration due to the long-term operation of the radio unit to extend the service time (life). I can.

The present invention can be used in a mobile communication technology field operating a plurality of frequency bands within a single cell, such as an LTE mobile communication system.

100: cell operating device
110: cell monitoring unit
120: condition determination unit
130: band adjustment processing unit

Claims (7)

Monitoring the increase or decrease of mobile communication terminals located within a service area in a single cell operating a plurality of frequency bands,
Determining whether the number of mobile communication terminals located in the service area satisfies a preset band adjustment condition; and
If it is determined that the band adjustment condition is satisfied, processing a mobile communication terminal using a specific band among the plurality of frequency bands to be handed off to another band,
The processing may include performing relaxation processing of an inter-band handoff condition.
How to operate the cell. delete The method of claim 1,
Cell operating method further comprising the step of performing output-on processing of the radio signal in the specific band according to a comparison result of the uplink signal level received from the mobile communication terminal using the specific band in another cell with a preset threshold . A computer-readable recording medium storing a computer program capable of executing the cell operating method according to claim 1 or 3. A cell monitoring unit that monitors the increase or decrease of mobile communication terminals located within a service area in a single cell operating a plurality of frequency bands,
A condition determining unit that determines whether the number of mobile communication terminals located in the service area satisfies a preset band adjustment condition;
When it is determined that the band adjustment condition is satisfied, a band adjustment processing unit for processing a mobile communication terminal using a specific band among the plurality of frequency bands to be handed off to another band,
The band adjustment processing unit performs relaxation processing of an interband handoff condition.
Cell operating device. delete The method of claim 5,
The band adjustment processing unit performs output-on processing of the radio signal in the specific band according to a result of comparing the uplink signal level received from the mobile communication terminal using the specific band in another cell with a preset threshold. Cell operating device.

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