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KR20140077572A - Apparatus for changing mode of base station in shared frequency and method thereof - Google Patents

Apparatus for changing mode of base station in shared frequency and method thereof Download PDF

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Publication number
KR20140077572A
KR20140077572A KR1020120146528A KR20120146528A KR20140077572A KR 20140077572 A KR20140077572 A KR 20140077572A KR 1020120146528 A KR1020120146528 A KR 1020120146528A KR 20120146528 A KR20120146528 A KR 20120146528A KR 20140077572 A KR20140077572 A KR 20140077572A
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KR
South Korea
Prior art keywords
mode
base station
subscriber
service
quality
Prior art date
Application number
KR1020120146528A
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Korean (ko)
Inventor
김준식
이숙진
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한국전자통신연구원
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Priority to KR1020120146528A priority Critical patent/KR20140077572A/en
Publication of KR20140077572A publication Critical patent/KR20140077572A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/06—Hybrid resource partitioning, e.g. channel borrowing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Disclosed are an apparatus and method for changing a mode of a base station in a shared frequency. The apparatus for changing the mode of a base station in a shared frequency according to the present invention comprises: an interference determining unit which performs a channel quality indicator (CQI) operation and determines whether an interference factor is generated by using the CQI; a wireless resource determining unit which measures quality of service (QoS) of a subscriber if the interference factor is generated and determines whether there is a surplus of a wireless resource by using the QoS; and a mode setting unit which differently sets an inner mode of the base station according to the surplus of the wireless resource.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus and method for changing a base station mode in a shared frequency,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a base station mode changing technique in a shared frequency, and more particularly, to an apparatus and method for changing a base station mode in a shared frequency that efficiently utilizes radio resources by changing a base station internal mode.

Recently, as the demand for high-speed and high-capacity services is increasing, mobile communication technologies are being developed to provide wireless data services with high transmission capacity as in 3GPP (Third Generation Partnership Project) and LTE (Long Term Evolution) mobile communication systems. In addition to basic voice, video and data services, each service includes different requirements in terms of performance and function because it includes control signals, and some services are required only in a specific area according to a dedicated network service. Therefore, the base station configuration that includes all the requirements is inefficient in terms of cost, and it is impossible to predict the requirements for services that are not currently included. In the above trend, a dedicated wireless network for public service such as public safety, air, port, traffic, and railway is constructed and services are provided by dividing a certain frequency band in order to utilize limited radio resources efficiently .

Korean Patent Laid-Open Publication No. 2009-0043487 discloses a technique for changing the operation mode of a femto base station in a macrocell in a wireless communication system, and introduces a configuration for changing a mode of a base station on a shared frequency. Korean Patent Publication No. 2008-0046996 Is a technique for reducing interference due to femtocells in a macrocell in a wireless communication system and introduces a configuration for changing an internal mode of a base station to an idle mode on a shared frequency.

However, the above conventional technologies only introduce a configuration in which a base station internal mode is changed or an idle mode is set on a shared frequency, and a concrete configuration in which a base station internal mode is set to a dedicated or common mode differently while maintaining a service quality of a subscriber And does not suggest or suggest. In addition, when the service quality of the subscriber can not be maintained while the non-subscriber is using the service, the non-subscriber handover is induced and the internal mode of the base station is set to the dedicated mode, thereby efficiently using the radio resource I do not introduce the configuration that makes it.

Accordingly, even when a plurality of dedicated radio networks are superimposed on a shared frequency and an interference factor is generated, the internal mode of the base station is set to a dedicated or common mode differently while maintaining the service quality of the subscriber, If the service quality of the subscriber can not be maintained, handover of the non-subscriber can be induced and the internal mode of the base station can be set to the dedicated mode. Thus, the subscriber can utilize the radio resources efficiently without any restriction on the use of the service. There is an urgent need for a new base station mode changing technique which uses wireless resources without waste by setting the internal mode of the base station to the idle mode when the service is not used.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a radio communication system and a radio communication method in which even when a plurality of dedicated radio networks are superimposed on a shared frequency and an interference factor is generated, .

It is also an object of the present invention to provide a method and system for providing a subscriber with a high quality service, To use radio resources.

It is also an object of the present invention to utilize wireless resources without waste by setting the internal mode of the base station to the idle mode when the non-users and the subscriber are not using the service.

According to an aspect of the present invention, there is provided an apparatus for changing a base station mode in a shared frequency, the apparatus comprising: a channel quality indicator (CQI) calculator for calculating an interference factor using the channel quality indicator; An interference determination unit A radio resource determiner for measuring a quality of service (QoS) of a subscriber when the interference factor occurs and determining whether a radio resource is available or not using the quality of service; And a mode setting unit for setting the internal mode of the base station differently depending on whether or not the radio resource is redundant.

Also, a method of changing a base station mode in a shared frequency according to the present invention includes the steps of: performing a channel quality indicator (CQI) operation and determining whether an interference factor is generated using the channel quality indicator value; Measuring a Quality of Service (QoS) of a subscriber when the interference factor occurs, and determining whether there is a surplus of radio resources using the quality of service; And setting an internal mode of the base station differently depending on whether or not the radio resource is available.

According to the present invention, even when a plurality of dedicated wireless networks are superimposed on a shared frequency and an interference factor is generated, the inner mode of the base station is set differently from the dedicated mode or the common mode while maintaining the service quality of the subscriber, Can be used.

In addition, when the service quality of a subscriber can not be maintained while a non-subscriber is using a service, non-subscriber handover is induced and a base station internal mode is set to a dedicated mode. Thus, Resources can be used.

In addition, the present invention can make the radio resource unnecessary by setting the internal mode of the base station to the idle mode when the non-subscriber and the subscriber do not use the service.

1 is a block diagram illustrating a base station mode changing apparatus in a shared frequency according to an embodiment of the present invention.
2 is a flowchart illustrating a method of changing a base station mode in a shared frequency according to an embodiment of the present invention.
3 is a diagram illustrating an example of a system to which a base station mode changing apparatus in the shared frequency of the present invention is applied.
4 is a flowchart illustrating an example of a method of changing a base station mode in a dedicated mode according to the present invention.
5 is an operation flowchart illustrating an example of a method of changing a base station mode in the public mode according to the present invention.

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a repeated description, a known function that may obscure the gist of the present invention, and a detailed description of the configuration will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

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

1 is a block diagram illustrating a base station mode changing apparatus in a shared frequency according to an embodiment of the present invention.

Referring to FIG. 1, an apparatus for changing a base station mode in a shared frequency according to an embodiment of the present invention includes an interference determination unit 110, a radio resource determination unit 120, and a mode setting unit 130.

The interference determining unit 110 performs a CQI operation and determines whether an interference factor is generated using the channel quality indicator value.

In this case, if the base station internal mode is the dedicated mode, the interference determining unit 110 can determine whether the interference factor is generated according to whether the base station is dynamically operated or not.

In this case, the dedicated mode may be a mode in which the BS only provides radio resources to the subscriber.

In this case, the interference determining unit 110 may determine whether the interference factor is generated when the base station is dynamically operated, and may not determine whether the interference factor is generated when the base station is not dynamically operated.

In this case, the interference determining unit 110 may determine that the interference factor is generated when the channel quality indicator value is less than a predetermined value.

The radio resource determiner 120 measures the quality of service (QoS) of the subscriber when the interference factor is generated, and determines whether there is a spare radio resource using the quality of service.

At this time, the radio resource determination unit 120 may determine that a spare portion of the radio resource exists if the quality of service of the subscriber exceeds a predetermined quality.

The mode setting unit 130 sets the internal mode of the base station differently depending on whether the radio resource is available or not.

At this time, the mode setting unit 130 can maintain the internal mode of the base station in the dedicated mode when the base station is not dynamically operated.

At this time, the mode setting unit 130 can maintain the base station internal mode in the dedicated mode when the interference factor is not generated.

At this time, the mode setting unit 130 can set the internal mode of the base station to the common mode when there is a spare of the radio resources.

In this case, the common mode may be a mode in which the base station provides radio resources to non-users.

At this time, the mode setting unit 130 can maintain the internal mode of the base station in the dedicated mode when there is no redundancy of the radio resources.

Although not shown in FIG. 1, the base station mode changing apparatus in the shared frequency according to an embodiment of the present invention may further include a use determining unit for determining whether the non-subscriber and the subscriber use the service.

In this case, the usage determining unit may determine whether the non-subscriber is using the service when the internal mode of the base station is the common mode.

At this time, the radio resource determination unit 120 can determine whether the subscriber uses the service if the non-subscriber does not use the service.

At this time, the radio resource determination unit 120 can determine whether the service quality of the subscriber is maintained when the non-subscriber uses the service.

At this time, the radio resource determination unit 120 may determine that the service quality of the subscriber is maintained if the quality of service of the subscriber exceeds a predetermined quality.

At this time, the radio resource determination unit 120 may induce a hand-over of the non-users when the service quality of the subscriber is not maintained.

At this time, the mode setting unit 130 may set the internal mode of the base station to the dedicated mode when the handover of the non-users is completed.

At this time, the mode setting unit 130 can maintain the base station internal mode in the common mode when the service quality of the subscriber is maintained.

In this case, the mode setting unit 130 may set the internal mode of the base station to the dedicated mode when the subscriber uses the service.

At this time, the mode setting unit 130 may set the internal mode of the base station to the idle mode when the subscriber does not use the service.

In this case, the idle mode may be a mode in which the base station does not provide radio resources to the non-subscriber and the subscriber.

2 is a flowchart illustrating a method of changing a base station mode in a shared frequency according to an embodiment of the present invention.

Referring to FIG. 2, a base station mode change method in a shared frequency according to an exemplary embodiment of the present invention performs a channel quality indicator (CQI) operation and determines whether an interference factor is generated (S210).

In this case, if the base station internal mode is the dedicated mode, step S210 may determine whether the interference factor is generated according to whether the base station is dynamically operated.

In this case, the dedicated mode may be a mode in which the BS only provides radio resources to the subscriber.

In this case, step S210 may determine whether the interference factor is generated when the base station is dynamically operated, and may not determine whether the interference factor is generated if the base station is not dynamically operated.

At this time, in step S210, it can be determined that the interference factor is generated when the channel quality indicator value is less than a preset value.

In addition, a method for changing a base station mode in a shared frequency according to an embodiment of the present invention measures a quality of service (QoS) of the subscriber when the interference factor occurs, It is determined whether there is a redundancy (S220).

In this case, if the service quality of the subscriber exceeds a predetermined quality, the step S220 may determine that there is a surplus of the radio resources.

In addition, the base station mode change method in the shared frequency according to an exemplary embodiment of the present invention sets the internal mode of the base station differently according to presence or absence of redundancy of the radio resource (S230).

In this case, the step S230 may maintain the base station internal mode in the dedicated mode when the base station is not dynamically operated.

In this case, in step S230, the base station internal mode may be maintained in the dedicated mode when the interference factor is not generated.

At this time, the step S230 may set the internal mode of the base station to the common mode when there is a spare of the radio resources.

In this case, the common mode may be a mode in which the base station provides radio resources to non-users.

At this time, the step S230 may maintain the internal mode of the base station in the dedicated mode when there is no redundancy of the radio resources.

Although not shown in FIG. 2, a method for changing a base station mode in a shared frequency according to an embodiment of the present invention may include determining whether the non-subscriber and the subscriber use the service between steps S210 and S220 .

At this time, the step of determining whether to use the service may determine whether the non-subscriber is using the service when the internal mode of the base station is the common mode.

At this time, step S220 can determine whether the subscriber is using the service if the non-subscriber does not use the service.

At this time, the step S220 may determine whether the service quality of the subscriber is maintained if the non-subscriber uses the service.

At this time, the step S220 may determine that the service quality of the subscriber is maintained if the quality of service of the subscriber exceeds a predetermined quality.

At this time, step S220 may induce a hand-over of the non-subscriber if the quality of service of the subscriber is not maintained.

At this time, in step S230, the base station internal mode may be set to the dedicated mode when the handover of the non-participants is completed.

At this time, the step S230 may maintain the base station internal mode in the common mode when the service quality of the subscriber is maintained.

In this case, the step S230 may set the BS internal mode to the dedicated mode when the subscriber uses the service.

At this time, the step S230 may set the base station internal mode to the idle mode if the subscriber does not use the service.

In this case, the idle mode may be a mode in which the base station does not provide radio resources to the non-subscriber and the subscriber.

3 is a diagram illustrating an example of a system to which a base station mode changing apparatus in the shared frequency of the present invention is applied.

Referring to FIG. 3, a system to which a base station mode changing apparatus in the shared frequency of the present invention is applied includes a macro cell base station 310, a femtocell base station 320, and a non-aggregated terminal 330.

The macro cell base station 310 and the femtocell base station 320 use a shared frequency.

3, the service providing range 315 of the macro cell base station 310 is wider than the service providing range 325 of the femtocell base station 320 and the non-subscriber terminal 330 has the service providing range 315 ) And the service provision range 325, as shown in FIG.

At this time, when the macrocell base station 310 operates in the dedicated mode and only the femtocell base station 320 operates in the common mode, the non-subscriber terminal 330 receives a service from the femtocell base station 320, It may cause severe interference to the macro cell base station 310 in the process.

Accordingly, the present invention proposes a technique of providing a service to the non-subscriber station 330 within a range in which the macrocell base station 310 maintains the service quality of the subscriber station.

In this case, the base station mode changing apparatus in the shared frequency of the present invention includes an interference determining unit 110, a radio resource determining unit 120, and a mode setting unit 130, 310).

The interference determining unit 110 performs a CQI operation and determines whether an interference factor is generated using the channel quality indicator value.

In this case, if the internal mode of the macrocell base station 310 is the dedicated mode, the interference determiner 110 may determine whether the interference factor is generated according to whether the macrocell base station 310 is dynamically operated.

In this case, the dedicated mode may be a mode in which the macro cell base station 310 provides radio resources only to the subscriber station.

In this case, the interference determining unit 110 determines whether the interference factor is generated when the macrocell base station 310 is dynamically operated, and determines whether the interference factor is generated when the macrocell base station 310 is not dynamically operated It may not judge.

In this case, the interference determining unit 110 may determine that the interference factor is generated when the channel quality indicator value is less than a predetermined value.

When the interference factor is generated, the radio resource determination unit 120 measures the quality of service (QoS) of the access terminal and determines whether there is a spare radio resource using the service quality.

At this time, if the quality of service of the subscriber station exceeds a predetermined quality, the radio resource determination unit 120 may determine that there is a surplus of the radio resource.

The mode setting unit 130 sets the internal mode of the macro cell base station 310 differently according to the presence or absence of redundancy of the radio resources.

In this case, the mode setting unit 130 may maintain the internal mode of the macro cell base station 310 in the dedicated mode when the macro cell base station 310 is not dynamically operated.

At this time, the mode setting unit 130 can maintain the internal mode of the macro cell base station 310 in the dedicated mode when the interference factor is not generated.

At this time, the mode setting unit 130 may set the internal mode of the macro cell base station 310 to the public mode when there is a spare of the radio resources.

In this case, the common mode may be a mode in which the macro cell base station 310 provides radio resources to the non-subscriber station 330 as well.

At this time, the mode setting unit 130 can maintain the internal mode of the macro cell base station 310 in the dedicated mode when there is no redundancy of the radio resources.

In addition, the base station mode changing apparatus in the shared frequency of the present invention may further include a non-diversity terminal 330 and a usage determination unit for determining whether the subscriber station uses the service.

When the internal mode of the macrocell base station 310 is the common mode, the usage determination unit may determine whether the non-subscriber station 330 is using the service.

At this time, the radio resource determination unit 120 can determine whether the subscriber station uses the service if the non-subscriber station 330 does not use the service.

At this time, the radio resource determination unit 120 can determine whether the service quality of the subscriber station is maintained when the non-subscriber station 330 uses the service.

At this time, the radio resource determination unit 120 may determine that the service quality of the subscriber station is maintained when the quality of service of the subscriber station exceeds a predetermined quality.

In this case, if the quality of service of the subscriber station is not maintained, the radio resource determination unit 120 performs handover from the macrocell base station 310 to the femtocell base station 320 with respect to the non- over.

At this time, the mode setting unit 130 can set the internal mode of the macro cell base station 310 to the dedicated mode when the handover of the non-subscriber station 330 is completed.

At this time, the mode setting unit 130 may maintain the internal mode of the macro cell base station 310 in the common mode when the quality of service of the access terminal is maintained.

At this time, the mode setting unit 130 may set the internal mode of the macro cell base station 310 to the dedicated mode when the subscriber station uses the service.

At this time, the mode setting unit 130 may set the internal mode of the macro cell base station 310 to the idle mode when the subscriber station does not use the service.

In this case, the idle mode may be a mode in which the macro cell base station 310 does not provide radio resources to the non-subscriber station 330 and the subscriber station.

As described above, in the base station mode changing apparatus of the present invention, the interference determining unit 110 performs a channel quality indicator (CQI) operation and determines whether or not an interference factor is generated using the channel quality indicator value The radio resource determination unit 120 measures the quality of service (QoS) of the subscriber station when the interference factor is generated, determines whether there is a spare radio resource using the service quality, The mode setting unit 130 may set the internal mode of the base station differently depending on whether or not there is a surplus of the radio resources so that the macro cell base station 310 may transmit the non- It can be seen that the service is also provided.

4 is a flowchart illustrating an example of a method of changing a base station mode in a dedicated mode according to the present invention.

Referring to FIG. 4, the base station mode change method in the dedicated mode according to the present invention determines whether the base station is dynamically operated (S410).

In this case, the dedicated mode may be a mode in which the BS only provides radio resources to the subscriber.

At this time, the step S410 may not determine whether the interference factor is generated if the base station is not dynamically operated.

In this case, in step S410, the base station internal mode may be maintained in the dedicated mode when the base station is not dynamically operated.

In addition, the base station mode change method in the dedicated mode according to the present invention determines whether the interference factor is generated when the base station is dynamically operated (S420).

At this time, in operation S420, a channel quality indicator (CQI) operation is performed, and it is determined whether an interference factor is generated using the channel quality indicator value.

At this time, in step S420, it can be determined that the interference factor is generated when the channel quality indicator value is less than a predetermined value.

At this time, in step S420, if the interference factor is not generated, the base station internal mode can be maintained in the dedicated mode.

In addition, the base station mode changing method in the dedicated mode according to the present invention determines whether there is a spare radio resource when the interference factor occurs (S430).

In this case, in step S430, the quality of service (QoS) of the subscriber may be measured, and it may be determined whether there is a surplus of radio resources using the quality of service.

In this case, if the quality of service of the subscriber exceeds a predetermined quality, step S430 may determine that there is a surplus of the radio resources.

At this time, in step S430, the BS internal mode may be set to the common mode when there is a spare of the radio resources.

In this case, the common mode may be a mode in which the base station provides radio resources to non-users.

At this time, in step S430, if there is no redundancy of the radio resources, the base station internal mode can be maintained in the dedicated mode.

5 is an operation flowchart illustrating an example of a method of changing a base station mode in the public mode according to the present invention.

Referring to FIG. 5, in the base station mode change method in the common mode according to the present invention, it is determined whether the non-subscriber uses the service (S510).

In the base station mode change method in the public mode according to the present invention, when the non-subscriber uses the service, it is determined whether the service quality of the subscriber is maintained (S520).

At this time, the step S520 may determine that the service quality of the subscriber is maintained if the quality of service of the subscriber exceeds a predetermined quality.

At this time, in step S520, if the service quality of the subscriber is not maintained, handover may be induced to the non-subscriber.

In this case, in step S520, the base station internal mode may be set to the dedicated mode when the handover of the non-participants is completed.

At this time, the step S520 may maintain the base station internal mode in the common mode when the service quality of the subscriber is maintained.

In addition, the base station mode change method in the public mode according to the present invention determines whether the subscriber uses the service when the non-subscriber does not use the service (S530).

In this case, in step S530, the subscriber can set the base station internal mode to the dedicated mode when using the service.

In this case, if the subscriber does not use the service, the step S530 may set the base station internal mode to the idle mode.

In this case, the idle mode may be a mode in which the base station does not provide radio resources to the non-subscriber and the subscriber.

As described above, the apparatus and method for changing the base station mode in the shared frequency according to the present invention are not limited to the configurations and methods of the embodiments described above. All or some of the embodiments may be selectively combined.

110:
120: radio resource determination unit
130: Mode setting section
310: macro cell base station
315: service coverage of the matched cell base station 310
320: femtocell base station
325: Service coverage of the femtocell base station 320
330: Non-particle terminal

Claims (1)

An interference determination unit for performing a channel quality indicator (CQI) operation and determining whether an interference factor is generated using the channel quality indicator value;
A radio resource determination unit for measuring a quality of service (QoS) of a subscriber when the interference factor occurs and for determining whether a radio resource is available or not using the service quality; And
A mode setting unit for setting the internal mode of the base station differently according to whether the radio resource is available or not,
Wherein the base station mode changing apparatus changes the base station mode within the shared frequency.
KR1020120146528A 2012-12-14 2012-12-14 Apparatus for changing mode of base station in shared frequency and method thereof KR20140077572A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120146528A KR20140077572A (en) 2012-12-14 2012-12-14 Apparatus for changing mode of base station in shared frequency and method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120146528A KR20140077572A (en) 2012-12-14 2012-12-14 Apparatus for changing mode of base station in shared frequency and method thereof

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KR20140077572A true KR20140077572A (en) 2014-06-24

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