KR101482909B1 - Method and apparatus for base station location and cell type determination in LTE-Advanced heterogeneous network - Google Patents

Method and apparatus for base station location and cell type determination in LTE-Advanced heterogeneous network Download PDF

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Publication number
KR101482909B1
KR101482909B1 KR20140097530A KR20140097530A KR101482909B1 KR 101482909 B1 KR101482909 B1 KR 101482909B1 KR 20140097530 A KR20140097530 A KR 20140097530A KR 20140097530 A KR20140097530 A KR 20140097530A KR 101482909 B1 KR101482909 B1 KR 101482909B1
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South Korea
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cell type
relay node
transmission rate
installation
base station
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KR20140097530A
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Korean (ko)
Inventor
이수경
이승섭
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연세대학교 산학협력단
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18Network planning tools
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/155Ground-based stations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/22Traffic simulation tools or models

Abstract

A method and apparatus for determining a base station installation location and a cell type in a heterogeneous network environment are disclosed. The method of determining the base station installation location and cell type in the heterogeneous network environment includes (a) using the frequency resource information and the modulation property information for each cell type or relay node considering the installation of each cell type or relay node at the installable position Calculating a user transmission rate, respectively; (b) calculating a change value using the user transmission rate before and after installation of the cell type or relay node in consideration of the type of program used at the installable position; And (c) determining an installable position and a cell type or a relay node using the calculated change value.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method and apparatus for determining base station location and cell type in a heterogeneous network environment,

The present invention relates to a method and apparatus for determining a base station installation position and a cell type in a heterogeneous network environment.

Conventionally, there is a method of selecting an installation site capable of optimizing the performance of a small base station in consideration of the surrounding radio wave environment and the building environment to be installed in the base station, in order to determine the location of the small base station.

However, in order to install the small base station, the base station determines the location information of the building to be installed and utilizes the stored structure information, so that various types of base stations and relay nodes can not be utilized in the installation process, It can not be applied to the installation of base stations in the environment or the installation considering two or more buildings at the same time

In addition, there is a method of automatically determining the location of a repeater installation in the past, but it is focused only on installation of a repeater, and is not applicable to installation of a small base station. In addition, There is a disadvantage that the influence can not be considered.

As described above, the conventional technologies have a disadvantage in that the number of small cells and the relay nodes are installed in a wide area existing in two or more buildings, and the degree of user performance improvement can not be considered considering the changing radio environment.

The present invention relates to a base station installation location and a cell type in a heterogeneous network environment in which a mounting location and a cell type of a small cell and a relay node can be selected such that a propagation shadow area is reduced in a heterogeneous network environment composed of cells and relay nodes of various sizes And to provide such a device.

In addition, the present invention provides a method of determining a cell type and a cell type in a heterogeneous network environment capable of determining a most efficient cell type and a base station installation position among various sizes of cells and relay nodes considering heterogeneous wireless environment and user satisfaction in a heterogeneous network environment And to provide such a device.

According to an aspect of the present invention, there is provided a method for determining the most efficient cell type and base station installation position among cells and relay nodes of various sizes considering heterogeneous wireless environment and user satisfaction in a heterogeneous network environment.

According to an embodiment of the present invention, (a) a user transmission rate is calculated using frequency resource information and modulation characteristic information for each cell type or relay node considering installation of each cell type or relay node at an installable position ; (b) calculating a change value using the user transmission rate before and after installation of the cell type or relay node in consideration of the type of program used at the installable position; And (c) determining an installable position and a cell type or a relay node using the calculated change value.

 The step (b) may be performed using the user transmission rate before and after the installation of the cell type or relay node at the installable position and the requested transmission rate for each program type used.

The step (b) may further include comparing the difference or ratio of the user type transmission rate of the cell type or the relay node after the installation of the cell type at the installable position with respect to the requested transmission rate by the type of the used program, Or the difference or ratio of the user's transmission rate before the installation of the relay node.

The use program type is a type of program mainly used by users who reside or reside at the installable position.

The step of calculating the user transmission rate may be calculated by further considering a resource for receiving data from the macro base station when calculating the user transmission rate for the relay node.

The step (a) and the step (b) may be repeatedly performed until the total sum of the transmission outputs of the cell type or the relay node is less than the maximum transmission output limitation condition, have.

The installable positions may be plural, and the steps (a) and (b) may be repeated for each installable position until the calculated change value is less than a threshold value.

Each of the installable positions is a plurality of points in which the base station is not installed included in the installation target area.

According to another aspect of the present invention, there is provided an apparatus capable of determining the most efficient cell type and base station installation position among cells and relay nodes of various sizes in consideration of surrounding wireless environment and user satisfaction in a heterogeneous network environment.

According to an embodiment of the present invention, there is provided a method for controlling a transmission rate of a first relay station, which calculates a user transmission rate using frequency resource information and modulation characteristic information for each cell type or relay node considering installation of each cell type or relay node at an installable position, Calculating section; A second calculation unit for calculating a change value using the user transmission rate before and after installation of the cell type or the relay node in consideration of the type of program used at the installable position; And a determination unit for determining an installable position and a cell type or a relay node using the calculated change value.

The second calculation unit may calculate a difference or a ratio of the user transmission rate after the installation of the cell type or the relay node at the installable position with respect to the requested transmission rate information for each program type to be used, The change value can be calculated using the difference or the ratio of the cell type at the location or the user transmission rate before the installation of the relay node.

The first calculation unit and the second calculation unit may sequentially select and repeat the calculation among the respective installable positions until the total sum of the transmission outputs of the cell type or the relay node is less than the maximum transmission output limitation condition have.

The first calculation unit and the second calculation unit may sequentially select each of the installable positions and repeat the calculation until the calculated change value is less than the threshold value.

The present invention provides a method and an apparatus for determining a base station installation position and a cell type in a heterogeneous network environment according to an embodiment of the present invention, and is capable of reducing a propagation shadow area in a heterogeneous network environment composed of cells and relay nodes of various sizes You can select the location of the cell and relay node and the type of cell.

In addition, the present invention has an advantage in that it can determine the most efficient cell type and base station installation position among cells and relay nodes of various sizes considering heterogeneous wireless environment and user satisfaction in a heterogeneous network environment.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart illustrating a method of determining a base station installation position and a cell type in a heterogeneous network environment according to an embodiment of the present invention; FIG.
2 is a graph illustrating user satisfaction versus transmission rate according to a program type according to an embodiment of the present invention.
3 is a diagram illustrating a method of determining a base station installation location and a cell type in a heterogeneous network environment in a base station installation area according to an exemplary embodiment of the present invention.
FIG. 4 and FIG. 5 are diagrams showing the result of installing a small cell and a relay node according to an office building according to an embodiment of the present invention; FIG.
FIG. 6 is a graph illustrating a result of user satisfaction according to an exemplary embodiment of the present invention; FIG.
FIG. 7 is a graph illustrating fairness among users according to an embodiment of the present invention; FIG.
FIG. 8 is a block diagram schematically showing an internal configuration of a base station installation position and a cell type determination apparatus according to an embodiment of the present invention; FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

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

FIG. 1 is a flowchart illustrating a method of determining a base station installation location and a cell type in a heterogeneous network environment according to an exemplary embodiment of the present invention. FIG. Satisfaction.

In step 110, the base station installation location and cell type determination apparatus 100 receives base station installation area information.

Here, the base station installation area information may be a finite number of position coordinates that can be set by the communication service provider, or may be a specific area or range.

If the base station installation area information is input into a specific area or range, the base station installation location and cell type determination apparatus 100 uniformly generates finite points within the specific area or range according to a predefined accuracy correction constant It is possible. Here, the correction constant is

Figure 112014072449151-pat00001
Lt; / RTI > The width indicates the width of the specific area or range, and the number of positions indicates the number of positions to be included in the specific area or range.

At this time, the base station installation area information may further include base station information previously installed. Of course, according to the implementation method, the base station installation location and cell type determination apparatus 100 may additionally receive previously installed base station information corresponding to the base station installation area information.

In step 113, the base station installation location and cell type determination apparatus 100 receives the type of the used program corresponding to the base station installation area information. That is, the base station installation position and cell type determination apparatus 100 can acquire the type of program used mainly by the user at the base station installation position through a communication system or a separate server. Here, the used program type may include a required transmission rate for each used program type.

Here, the type of program to be used may be a program type mainly used by a user who resides in the base station installation area, for example, data communication, voice communication, video communication, file transmission, and the like.

For example, the base station installation location and cell type determination apparatus 100 may determine the type of program to be used in consideration of user information (e.g., age, sex, etc.) residing in the base station installation area.

In step 115, the base station installation location and cell type determination apparatus 100 determine whether the sum of the base station transmission outputs is below a threshold value.

In step 120, the base station installation location and cell type determination apparatus 100 sequentially select one installable location based on the base station installation area information.

Next, in step 123, the base station installation location and cell type determination apparatus 100 refers to the base station installation area information and determines frequency resource information for each cell type or relay node according to installation of each cell type or relay node at an installable position, And calculates the user transmission rate in consideration of the modulation characteristic information.

Here, the base station installation location and cell type determination apparatus 100 may make the user transmission rate calculation different according to the cell type or the relay node.

For example, the base station installation location and cell type determination apparatus 100 can calculate the user transmission rate using the following equation 1 for each cell type.

Figure 112014072449151-pat00002

Here, MCS m represents the highest value among the indexes usable in the signal strength (SINR: Signal to Interference plus Noise Ratio) considering each user's inter-cell interference, and BLER indicates the maximum value of the current signal strength It represents the average error probability.

Also, the resource size allocated to the target cell indicates the size of the resource actually allocated by the user j when the radio resource of the predetermined size is allocated to each user served by the corresponding cell according to the type of the small cell.

For example, the resource distribution method may employ a round-robin scheme that distributes resources equally to all users served in the cell in a sequential manner, or an actual model used by each carrier.

In the case of a relay node unlike a small cell, additional radio resources are required to receive data from the macro base station, and therefore, the remaining radio resources except the resources used for communication with the macro base station are distributed to users.

Therefore, in case of the relay node, the user transmission rate can be calculated using the following equation 2.

Figure 112014072449151-pat00003

here,

Figure 112014072449151-pat00004
Represents a ratio of frames allocated for data transmission from a base station to a relay node, and a method of allocating resources among users is a round-robin scheme or an actual model used by each communication carrier, Can be applied.

After calculating the user transmission rate according to the small cell type or the relay node, the base station installation position and the cell type determination apparatus 100 determine the cell type or the relay node And calculates the change value using the user transmission speed before and after the installation.

To this end, a satisfaction rate model for user transmission rate can be used for each program type. The satisfaction rate model for the user transfer rate for each type of program used is shown in FIG.

Referring to FIG. 2, the file transfer program has a great effect on the improvement of the user's satisfaction, such as the program type 1, while the increase in the transfer rate greatly affects the satisfaction of the user. In the case of the program type 2 such as the Internet telephone service, Have characteristics that must be ensured.

Therefore, the base station installation position and cell type determination apparatus 100 can calculate the change value of satisfaction using the cell type or the user transmission rate before and after the installation of the relay node, using the satisfaction level model for each program type at each installable position.

More specifically, the base station installation location and cell type determination apparatus 100 determines a cell type or a user transmission after installation of the relay node at the installable position with respect to the requested transmission rate information for each program type, The change value can be calculated using the difference in speed and the difference in the user transmission rate before the installation of the cell type or the relay node at the installable position with respect to the required transmission rate information according to the program type used. This can be expressed by the following equation (3).

Figure 112014072449151-pat00005

In this manner, a change value can be derived for each available cell type or using the user transmission rate for the relay node. At this time,

Figure 112014072449151-pat00006
Is the ratio or difference of the user transmission rate versus the required transmission rate of the program or application in use, otherwise it can be expressed as the user satisfaction.

In step 130, the base station installation position and cell type determination apparatus 100 determine whether the newly calculated change value is greater than a pre-stored maximum change value.

If the newly calculated change value is smaller than the maximum change value, the process proceeds to step 140.

If the newly calculated change value is larger, the base station installation position and cell type determination apparatus 100 store the newly calculated change value as the highest change value and store the selected installable position and cell type.

At this time, the selected installable position and cell type can be used for the next installable position measurement, assuming that the base station is installed according to the cell type at the corresponding position.

In step 140, the base station installation location and cell type determination apparatus 100 refer to the base station installation area information to determine whether there is a next installable location.

If there is a next installable position, the process proceeds to step 123.

However, if there is no next installable location, the base station installation location and cell type determination apparatus 100 in step 145 determines whether the stored maximum change value exceeds zero.

If it is less than 0, it is determined that there is no space available for installation or the maximum transmission output restriction condition is not satisfied, and the process ends.

However, if it exceeds 0, the base station installation position and cell type determination apparatus 100 determine the installable position and the cell type corresponding to the maximum change value as the new cell installation position and the cell type in step 150.

Then, the base station installation location and cell type determination apparatus 100 proceeds to step 115. [

As described above, the base station installation location and cell type determination apparatus 100 determines that the maximum user satisfaction improvement value is less than 0 in order to install at least one small cell or relay node, It is possible to perform steps 115 to 150 repeatedly until it is not satisfied.

Here, the maximum transmission output limiting condition is set so that the total sum of the transmission outputs of the installed small cell or relay node is adjusted to be equal to or less than a preset threshold value, and the total number of small cells or relay nodes to be installed by the user or the communication carrier Can be adjusted through the maximum allowable cost value.

3 is a diagram illustrating a method of determining a base station installation location and a cell type in a heterogeneous network environment in a base station installation area according to an embodiment of the present invention.

As shown in FIG. 3, it is assumed that a plurality of points are included in the base station installation area, and a part of the plurality of points includes a base station for a specific cell.

In such a case, the base station installation position and cell type determination apparatus 100 calculates and stores the user satisfaction improvement value for each cell type and relay node with respect to the selectable first point 310, 315 may be performed to calculate a change value for each cell type and each relay node. Accordingly, the base station installation position and cell type determination apparatus 100 can determine to install the most efficient base station type among various cell types or relay nodes at the optimal position.

FIGS. 4 and 5 are diagrams showing a result of installing a small cell and a relay node according to the presence or absence of an office building according to an exemplary embodiment of the present invention, and FIG. 6 is a diagram illustrating a result of user satisfaction according to an exemplary embodiment of the present invention And FIG. 7 is a graph illustrating fairness among users according to an embodiment of the present invention. In FIG. 4 and FIG. 5, the portions brightly displayed close to white represent areas where signal strength is good, and the portions darkened near black indicate portions where signal intensity is poor.

In FIG. 4 and FIG. 5, the macro base station located at the center of the macro cell initially installed is indicated by a blue square, and the newly installed relay node is indicated by a red triangle. As shown in FIGS. 4 and 5, since the signal strength is very weak before the small cell and the relay node are installed, the small cell and the relay node are installed in the shaded area indicated by black, Can be confirmed. In addition, the small cell and the relay node are simulated as being installed at a constant distance in order to increase user satisfaction while minimizing interference between adjacent cells.

The results for user satisfaction are shown in Fig. When the maximum transmission power limitation condition is set to 20W, the average user satisfaction is determined by considering the variation value according to each cell type or relay node installation for each installable position in a heterogeneous network environment according to an embodiment of the present invention, The user satisfaction is greatly increased.

7 is a graph showing fairness among users. In the environment where the maximum transmission power limitation is set to 20W, the fairness among users is improved by up to 38.38%, and the maximum value is close to 1.0. The result according to FIG. 7 means that the service quality of the user who has not been smoothly served in the shadow area is greatly improved due to the removal of the shadow area through the installation of the small cell and the relay node.

The method of determining the base station installation location and the cell type in the heterogeneous network environment according to an embodiment of the present invention can efficiently select and install various types of small cells and relay nodes in the LTE-Advanced heterogeneous network environment, It is possible to increase the cost efficiency by installing the small cell and the relay node considering the signal intensity considering the interference, the transmission speed and the user satisfaction thereof.

In addition, the method of determining the base station installation location and the cell type in the heterogeneous network environment according to an embodiment of the present invention can automatically determine the types and installation locations of the various types of small cells and relay nodes in the area where a plurality of buildings can be included It is possible to reduce the labor and cost that the communication network operator has to manually select, maximize the satisfaction of the user after installation, and reduce the imbalance in performance between users.

8 is a block diagram schematically illustrating an internal configuration of a base station installation position and a cell type determining apparatus according to an embodiment of the present invention.

8, the base station installation location and cell type determination apparatus 100 according to an embodiment of the present invention includes an input unit 810, a first calculation unit 815, a second calculation unit 820, a determination unit 825, a memory 830, and a control unit 835.

The input unit 810 is a means for receiving the base station installation area information. Also, the input unit 810 may receive the type of program used corresponding to each base station installation area information. At this time, the used program type may further include a required transmission rate for each used program type.

The first calculation unit 815 calculates a user transmission rate by considering frequency resource information and modulation characteristic information for each cell type or relay node at each installable position based on the base station installation area information. Here, the modulation characteristic information may be at least one of a modulation order and a modulation method.

The second calculation unit 820 calculates a change value per unit transmission output using the calculated user transmission rate for each cell type or relay node.

More specifically, the second calculation unit 820 calculates the difference (or ratio) of the user transmission rate after the installation of the cell type or relay node and the cell type or the cell type at the installable position with respect to the requested transmission rate information The change value can be calculated using the difference (or ratio) of the user transmission speed before the installation of the relay node.

The determination unit 825 determines the installable position and the cell type or relay node corresponding to the change type of the cell type for each installable position or the change value calculated for the relay node is the highest.

The memory 830 records various types of algorithms necessary for operating the base station installation location and cell type determination apparatus 100 according to an embodiment of the present invention, various data derived from the process, and the like.

The control unit 835 controls the internal components (e.g., the input unit 810, the first calculation unit 815, the second calculation unit 810, and the second calculation unit 810) of the base station installation position and cell type determination apparatus 100 according to an embodiment of the present invention. Unit 820, determination unit 825, memory 830, and the like).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

100: base station installation position and cell type determination device
810:
815:
820:
825:
830: Memory
835:

Claims (13)

  1. (a) calculating a user transmission rate using frequency resource information and modulation characteristic information for each cell type or relay node considering installation of each cell type or relay node at an installable position;
    (b) calculating a change value using the user transmission rate before and after installation of the cell type or relay node in consideration of the type of program used at the installable position; And
    (c) determining an installable position and a cell type or a relay node using the calculated change value,
    Wherein the installable position is a plurality of points where the base station included in the installation target area is not installed.
  2. The method of claim 1, wherein the step (b)
    Wherein the calculation is performed using the user transmission rate before and after installation of the cell type or relay node at the installable position and the required transmission rate for each type of program to be used.
  3. 3. The method of claim 2, wherein step (b)
    A difference or a ratio of a user type transmission rate of the cell type or a relay node after installation of the relay node at the installable position with respect to the required transmission rate of each program type, And a ratio of the user's transmission rate before the installation of the relay node or a ratio of the user's transmission rate before the installation of the relay node.
  4. The method according to claim 1,
    Wherein the used program type is a program type used by users resident or residing in the installable location.
  5. The method according to claim 1,
    The step of calculating the user transmission rate,
    And calculating a user transmission rate for the relay node by considering a resource for receiving data from the macro base station.
  6. The method according to claim 1,
    The step (a) and the step (b)
    Wherein each of the installable positions is sequentially executed,
    And repeating the steps until the total sum of the cell type or relay node transmission output is less than a maximum transmission output limiting condition.
  7. The method according to claim 1,
    Wherein the installable positions are plural,
    Wherein the step (a) and the step (b) are repeated for each installable position until the calculated change value is less than a threshold value.
  8. delete
  9. A recording medium on which program codes for performing the method according to any one of claims 1 to 7 are recorded.
  10. A first calculation unit for calculating a user transmission rate using frequency resource information and modulation characteristic information for each cell type or relay node considering installation of each cell type or relay node at an installable position;
    A second calculation unit for calculating a change value using the user transmission rate before and after installation of the cell type or the relay node in consideration of the type of program used at the installable position; And
    And a determination unit for determining an installable position, a cell type, or a relay node using the calculated change value,
    Wherein the installable position is a plurality of points where the base station included in the installation target area is not installed.
  11. The apparatus of claim 10,
    A difference or a ratio of a user type transmission rate of the cell type or a relay node after installation of the relay node at the installable position with respect to the requested transmission rate information for each program type to be used, Wherein the change value is calculated using a difference or a ratio of a user transmission rate before installation of the relay node.
  12. 11. The method of claim 10,
    Wherein the first calculation unit and the second calculation unit calculate,
    And repeats the calculation of each of the installable positions sequentially and repeatedly until the total sum of the cell type or relay node transmission output is less than the maximum transmission output limitation condition.
  13. 11. The method of claim 10,
    Wherein the first calculation unit and the second calculation unit calculate,
    And sequentially repeats the calculation of the selected base station installation position and cell type until each calculated change value is less than a threshold value.
KR20140097530A 2014-07-30 2014-07-30 Method and apparatus for base station location and cell type determination in LTE-Advanced heterogeneous network KR101482909B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019135460A1 (en) * 2018-01-05 2019-07-11 국방과학연구소 Method for determining node position in cognitive radio network environment and node position determining apparatus for implementing same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100556166B1 (en) 2000-08-11 2006-03-06 닛본 덴끼 가부시끼가이샤 Communication system, communication method thereof, switching center thereof and base station control station thereof
KR20130060913A (en) * 2011-11-30 2013-06-10 주식회사 케이티 System and method for locating base station in wireless communication service
US20130308521A1 (en) * 2011-01-25 2013-11-21 Huawei Technologies Co., Ltd. Method for allocating radio resources in relay cell, base station, and system
US8638679B2 (en) 2009-05-28 2014-01-28 Qualcomm Incorporated Method and apparatus that facilitates automatic assistance for positioning of access point base stations

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100556166B1 (en) 2000-08-11 2006-03-06 닛본 덴끼 가부시끼가이샤 Communication system, communication method thereof, switching center thereof and base station control station thereof
US8638679B2 (en) 2009-05-28 2014-01-28 Qualcomm Incorporated Method and apparatus that facilitates automatic assistance for positioning of access point base stations
US20130308521A1 (en) * 2011-01-25 2013-11-21 Huawei Technologies Co., Ltd. Method for allocating radio resources in relay cell, base station, and system
KR20130060913A (en) * 2011-11-30 2013-06-10 주식회사 케이티 System and method for locating base station in wireless communication service

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019135460A1 (en) * 2018-01-05 2019-07-11 국방과학연구소 Method for determining node position in cognitive radio network environment and node position determining apparatus for implementing same

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