KR20090037636A - Method for setting base station information of femtocell base station and applied to femtocell base station - Google Patents

Abstract

The present invention discloses a method for setting base station information of a femtocell base station installed in a home located on a macro base station coverage and having a separate femtocell coverage, and a femtocell base station applied thereto. In the method for setting base station information of a femtocell base station according to the present invention, a) a frequency detection unit measures power per frequency (FA) of a frequency introduced into a home according to power supply, and sets the measured power value to a predetermined setting value. Comparing with; b) detecting, by the frequency detector, a specific frequency region as a center frequency according to the comparison result; c) selecting, by a code detector, a specific code group among a plurality of code groups according to the detected power value of the center frequency; And d) detecting, by the code detector, a scrambling code in the selected specific code group according to the use state of the selected specific code group. According to the automatic detection and setting of the scrambling code, it can operate without interference with the existing outdoor base station only by the user's power-on operation.

Description

A method for setting base station information of a femtocell base station and a femtocell base station applicable thereto {SETTING SYSTEM FOR BTS INFORMATION OF FEMTOCELL BTS AND FEMTOCELL BTS APPLIED TO THE SAME}

The present invention relates to an initial configuration of a femtocell base station located in a premises, and more particularly, to automatically set base station information so as to avoid interference problems with an existing outdoor base station during initial configuration of a femtocell base station located in a premises. It is about femtocell base station setting method and applied femtocell base station.

Existing mobile communication service has been progressed based on voice service-oriented business model. However, with the advent of various high-speed data service systems such as HSDPA and Mobile WiMAX, the center of gravity of the business is shifting to wireless data service.

However, even a system that provides such a high-speed data service has a channel capacity of only several Mbps, and the channel capacity is shared by hundreds of users located within base station coverage, and thus the available download speed per person is only tens to hundreds of Kbps. . Therefore, users who have experienced tens of Mbps speeds of wired and wireless LANs are greatly reduced in terms of satisfaction.

In order to solve this problem, according to the development of semiconductor technology, it can be manufactured inexpensively, and it can be installed at home or indoor and used by a few users (about 1 ~ 4), which can reach several Mbps per subscriber in mobile communication systems. Attempts have been made to provide transmission capacity.

In this regard, recently, a femtocell, which is a personal base station installed indoors and serving 1 to 4 subscribers, has been proposed. The femtocell is a combination of femto, which represents one-tenth of a trillion (10 to 15 squared), and a cell, which represents a unit of a service area in charge of one base station in mobile communication. It refers to a service that covers an area much smaller than the service radius, and it is possible to provide a wired / wireless communication and a home network through a mobile phone and a combined service with an IP by connecting a small base station shaped like a DSL modem to a wired IP network in a home. In addition, since the mobile communication data is transmitted from the base station to the exchange immediately without passing through the indoor repeater, the service provider can reduce the frequency load and improve the call quality while reducing the network construction cost.

In this regard, since the femtocell base station is located in the area of the macro radius macro macro base station that exists outdoors, the femtocell base station should be set to avoid interference with the macro cell base station in the initial setting process. Such a configuration may be performed by the RNC in charge of the femtocell base station or manually set during femtocell installation.

However, since the femtocell base station location is likely to be located in a home including a general home or office, it is difficult to record information about the location of the femtocell base station. It is inconvenient to grasp the surrounding information through actual measurement.

In addition, if the purpose of the femtocell is to allow a general user to use it through a simple setting such as a WLAN router (Self-Installation), it is difficult to use the aforementioned method.

 The present invention was created to solve the problems inherent in the prior art as described above, an object of the present invention is to set the initial information according to the power supply of the femtocell base station, a) according to the power supply A frequency detecting unit measuring power for each frequency area (FA) of the frequency introduced into the home, and comparing the measured power value with a predetermined setting value; b) detecting, by the frequency detector, a specific frequency region as a center frequency according to the comparison result; c) selecting, by a code detector, a specific code group among a plurality of code groups according to the detected power value of the center frequency; d) detecting, by the code detector, a scrambling code in the selected specific code group according to the use state of the selected specific code group; And e) specifying, by the information setting unit, the detected center frequency and the scrambling code as its own base station configuration parameters.

Still another object of the present invention is to measure the power for each frequency area (FA) of the frequency flowing into the home according to the power applied, and to compare the measured value with a predetermined set value to a specific frequency region as the center frequency A frequency detector for detecting; A code detector configured to select a specific code group among a plurality of code groups according to the measured power value of the center frequency, and detect a scrambling code belonging to the specific code group; And an information setting unit for designating the detected center frequency and the scrambling code as a base station setting parameter.

According to an aspect of the present invention for achieving the above object, there is provided a femtocell base station having a separate femtocell coverage is installed in the home located on the macro base station Coverage: this femtocell base station The apparatus may include: a frequency detector configured to measure power for each frequency region (FA) flowing into the home according to power application, and detect a specific frequency region as a center frequency by comparing the measured power value with a predetermined setting value; And a code detector for selecting a specific code group among a plurality of code groups according to the measured power value of the center frequency and detecting a scrambling code belonging to the specific code group.

Preferably, the base station further comprises an information setting unit for designating the detected center frequency and the scrambling code as a base station setting parameter.

Preferably, the frequency detection unit is characterized in that for detecting the specific frequency region of the measured power value is less than the predetermined set value as the center frequency.

Preferably, the frequency detector, when the power measurement value for each frequency region is larger than the predetermined set value, characterized in that for detecting the specific frequency region having the minimum power value as a center frequency.

Preferably, the code detector, when the power value of the specific frequency region is less than or equal to the predetermined set value, characterized in that for detecting the scrambling code by selecting the specific code group corresponding to any code group.

Preferably, the code detector, when the power value of the specific frequency region is greater than the predetermined set value, the slot synchronization through the P-SCH search and the frame synchronization through the S-SCH search Through the identification of the plurality of code groups, characterized in that the scrambling code is detected in a specific code group of the unused state of the plurality of identified code groups.

Preferably, the code detector detects the scrambling code in an unused state in a code group having a minimum power among the plurality of code groups when there is no code group in an unused state among the identified code groups. .

According to another aspect of the present invention, there is provided a method for setting base station information of a femtocell base station installed in a home located on a macro base station coverage and having a separate femtocell coverage. a) measuring a power for each frequency area (FA) of the frequency introduced into the home according to power application, and comparing the measured power value with a predetermined setting value; b) detecting, by the frequency detector, a specific frequency region as a center frequency according to the comparison result; c) selecting, by a code detector, a specific code group among a plurality of code groups according to the detected power value of the center frequency; d) detecting, by the code detector, a scrambling code in the selected specific code group according to the use state of the selected specific code group; And e) specifying, by the information setting unit, the detected center frequency and the scrambling code as its base station configuration parameters.

Preferably, the step b) is characterized in that for detecting the specific frequency region as the center frequency in which the measured power value is less than the predetermined set value.

Preferably, the step b) is characterized in that for detecting the specific frequency region having the minimum power value as the center frequency when the power measurement value for each frequency region is larger than the predetermined set value.

Preferably, the step c) is characterized in that, when the power value of the specific frequency region is less than or equal to the predetermined setting value, the specific code group corresponding to an arbitrary code group is selected.

Preferably, the step c) may include slot synchronization through P-SCH search and frame synchronization through S-SCH search when the power value of the specific frequency domain is greater than the predetermined setting value. The plurality of code groups are selected through acquisition.

Preferably, the step d) is characterized in that for detecting the scrambling code in a specific code group of the unused state of the plurality of identified code groups.

Preferably, the step d) is characterized in that, if the identified plurality of code groups are in use, detecting the scrambling code in an unused state in a code group having the least power among the plurality of code groups.

A method for setting base station information of a femtocell base station and a femtocell base station applied thereto according to the present invention are automatically detected and set by an unused frequency area (FA) and a scrambling code, and thus, the existing outdoor base station only by powering on the user. It can operate without interference.

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

1 shows a schematic configuration diagram of a femtocell base station according to an embodiment of the present invention.

The femtocell base station as shown in FIG. 1 provides a specific mobile communication service by setting a femtocell coverage for a few subscribers in a building located in an area of a macro radius macro macro station located outdoors. . That is, the mobile terminal provides a large amount of content according to a mobile communication service and a high speed internet service provided by a communication provider and a separate contents provider (CP) through an IP network to the femtocell coverage.

The femtocell base station includes: a frequency detector 100 for selecting an unused frequency region among frequency domains (FA) introduced into a home and detecting the unused frequency region as a center frequency; A code detector 200 for selecting an unused code group and detecting a scrambling code belonging to the selected code group; The initial setting process according to the power is applied, having a configuration including a; information setting unit 300 for setting the center frequency and the scrambling code detected by the frequency detector 100 and the code detector 200 as its own base station information. Auto configuration is performed to avoid interference with the macro cell base station.

The frequency detector 100 measures power for each region of the frequency flowing into the home according to power application, and compares the measured value with a predetermined setting value to detect a specific frequency region as the center frequency.

More specifically, the frequency detector 100 measures the power value for each frequency domain according to the communication service provider or the set order, and selects and detects the unused frequency range by comparing the measured power value with a predetermined setting value.

That is, when a specific frequency region is less than or equal to a predetermined set value among the measured power values, the corresponding frequency region is determined as an unused frequency region and detected as a center frequency according to base station operation.

In addition, when the power measurement value for each frequency domain is greater than the predetermined value, the frequency detector 100 detects the specific frequency domain having the minimum power value as the unused frequency domain and detects the corresponding frequency domain as the center frequency. do.

The code detector 200 selects a specific code group among a plurality of code groups according to the measured power value of the center frequency, and detects a scrambling code belonging to the specific code group.

More specifically, the code detector 200 selects a scrambling code based on a result of comparing the power value of the center frequency detected by the frequency detector 100 with the set value.

In other words, when the power value of the specific frequency region detected as the center frequency is equal to or less than the predetermined setting value, that is, the center frequency is an unused frequency region, the code detector 200 selects an arbitrary code group and selects any selected code. Detect the scrambling code in the group.

Also, the code detector 200 may determine a slot through a P-SCH search when the power value of a specific frequency region detected as the center frequency is larger than the predetermined set value, that is, the center frequency is not an unused frequency region. Slot code synchronization and frame synchronization through S-SCH search are acquired to identify a code group, and if there is a code group in an unused state among the identified code groups, a scrambling code is detected in the corresponding code group.

On the other hand, if the plurality of identified code groups are not in the unused state, the code detector 200 measures power of the plurality of code groups, selects a specific code group having the minimum power, and uses the unused state in the selected code group. Detect the scrambling code. For reference, when there is no scrambling code in the unused state in the specific code group having the minimum power, the code detector 200 notifies the information setting unit 300 to request that the base station information cannot be set.

The information setting unit 300 designates the detected center frequency and the scrambling code as a base station setting parameter and notifies the mobile communication network located outside through an IP network. On the other hand, when the information setting unit 300 is notified that there is no scrambling code in the unused state from the code detection unit 200, it notifies the mobile communication network located outside the base station information setting state through the IP network.

Hereinafter, a method of setting base station information of a femtocell base station according to an embodiment of the present invention will be described with reference to FIG. 2. 2 is a flowchart illustrating a method for setting base station information of a femtocell base station according to an embodiment of the present invention.

First, in order to set initial information according to power application, the frequency detector 100 measures power for each frequency area (FA) of the frequency flowing into the home (S110). Preferably, the frequency detector 100 measures a power value for each frequency domain according to a communication service provider or a set order.

Then, the frequency detector 100 compares the measured power value with a predetermined setting value and determines whether an unused frequency region exists among the plurality of frequency regions (S120). Preferably, the frequency detector 100 selects the unused frequency range by comparing the measured power value with a predetermined set value.

In this case, when a specific frequency region is less than a predetermined set value among the measured power values, the corresponding frequency region is determined as an unused frequency region and detected as a center frequency according to the operation of the base station (S130).

Then, when the power value of the specific frequency region detected by the center frequency is less than or equal to the predetermined setting value, that is, the center frequency is an unused frequency region, the code detector 200 selects an arbitrary code group and selects any selected code. The scrambling code is detected in the group, and the information setting unit 300 designates the detected center frequency and the scrambling code as the base station setting parameters, and notifies the mobile communication network located outside of the setting information through the IP network (S140). -S160).

Meanwhile, when the power measurement value for each frequency region through the step 'S120' is greater than the predetermined set value, the frequency detector 100 regards a specific frequency region having the minimum power value as an unused frequency region, The frequency domain is detected as the center frequency (S170).

Then, the code detector 200 may determine a slot through the P-SCH search when the power value of the specific frequency region detected as the center frequency is larger than the predetermined value, that is, the center frequency is not an unused frequency region. Slot) and frame synchronization through S-SCH search are acquired to identify a code group, and whether there is a code group in an unused state among the identified code groups is determined (S180-S200).

In this case, when there is a code group in an unused state, the code detector 200 detects a scrambling code in the corresponding code group, and the information setting unit 300 designates the detected center frequency and scrambling code as base station configuration parameters. At the same time, the configuration information is notified to the mobile communication network located outside through the IP network (S210-S220).

On the other hand, when the code detection unit 200 determines the use state for each code group through the step 'S200', when the identified plurality of code groups are not in an unused state, slot synchronization and S through the P-SCH search are performed. The frame synchronization through the SCH search is obtained to identify a plurality of code groups, and the power of the plurality of code groups is measured to select a specific code group having the minimum power (S230-S250).

Thereafter, it is determined whether there is a scrambling code of the unused state in the selected specific code group, and if there is a scrambling code of the unused state, the corresponding scrambling code is detected (S260-S270).

Then, the information setting unit 300 designates the detected center frequency and the scrambling code as a base station setting parameter, and notifies the mobile communication network located outside of the setting information through the IP network (S280).

On the other hand, the code detector 200 notifies the information setting unit 300 when there is no scrambling code in the unused state in a specific code group having the minimum power, the information setting unit 300 receives the information setting state of the base station information impossible To notify the mobile communication network located outside via the IP network (S290-S300).

Although the present invention has been described in detail with reference to the preferred embodiments, the present invention is not limited to the above-described embodiments, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the following claims. Anyone skilled in the art will have the technical idea of the present invention to the extent that various modifications or changes are possible.

The femtocell according to the present invention can be automatically detected and set by a frequency allocation (FA) and a scrambling code (FA) that can operate without interference with an existing outdoor base station by only a simple power-up operation of a general user. When the base station information setting method of the base station and the femtocell base station to be applied thereto are applied, it is possible to make a great progress in the installation, engineering and operation of the femtocell, and there is a possibility of commercialization or sales of the applied device, as well as practically obvious. It is an invention with industrial applicability as much as it can be.

The following drawings, which are attached in this specification, illustrate preferred embodiments of the present invention, and together with the detailed description of the present invention, serve to further understand the technical spirit of the present invention. It should not be construed as limited to.

1 is a schematic configuration diagram of a femtocell base station according to an embodiment of the present invention.

2 is a flowchart illustrating a method for setting base station information of a femtocell base station according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

100: frequency detector

200: code detection unit

300: information setting unit

Claims (14)

A femtocell base station installed in a home located on a macro base station coverage and having a separate femtocell coverage, A frequency detector configured to measure power for each frequency region (FA) flowing into the home according to power application, and detect a specific frequency region as a center frequency by comparing the measured power value with a predetermined setting value; And A femtocell base station, comprising: a code detector for selecting a specific code group among a plurality of code groups according to the measured power value of the center frequency and detecting a scrambling code belonging to the specific code group . The method of claim 1, wherein the base station, And an information setting unit for designating the detected center frequency and the scrambling code as a base station setting parameter. The method of claim 1, wherein the frequency detector, The femtocell base station, characterized in that for detecting the specific frequency range of the measured power value is less than the predetermined set value as the center frequency. The method of claim 1, wherein the frequency detector, The femtocell base station, if the power measurement value for each frequency domain is greater than the predetermined value, detects the specific frequency domain having the minimum power value as a center frequency. The method of claim 3, wherein the code detector, And when the power value of the specific frequency domain is less than or equal to the predetermined setting value, selecting the specific code group corresponding to an arbitrary code group to detect the scrambling code. The method of claim 4, wherein the code detector, When the power value of the specific frequency domain is larger than the predetermined value, the plurality of code groups are identified through slot synchronization through P-SCH search and frame synchronization through S-SCH search. And detecting a scrambling code in a specific code group which is in an unused state among the identified plurality of code groups. The method of claim 6, wherein the code detector, The femtocell base station, if there is no code group in the unused state of the identified code group, the scrambling code in the unused state is detected in the code group having the minimum power of the plurality of code groups. In the base station information setting method of the femtocell base station installed in the home located on the macro base station coverage (Cover), having a separate femtocell coverage, a) measuring, by a frequency detector, power for each frequency area (FA) of the frequency introduced into a home according to power application, and comparing the measured power value with a predetermined setting value; b) detecting, by the frequency detector, a specific frequency region as a center frequency according to the comparison result; c) selecting, by a code detector, a specific code group among a plurality of code groups according to the detected power value of the center frequency; d) detecting, by the code detector, a scrambling code in the selected specific code group according to the use state of the selected specific code group; And and e) an information setting unit designating the detected center frequency and the scrambling code as its own base station configuration parameters. The method of claim 8, wherein b), And detecting the specific frequency region in which the measured power value is equal to or less than the predetermined setting value as the center frequency. The method of claim 8, wherein b), And detecting the specific frequency region having the minimum power value as the center frequency when the power measurement value for each frequency region is larger than the predetermined setting value. The method of claim 9, wherein step c) And when the power value of the specific frequency region is less than or equal to the predetermined setting value, selecting the specific code group corresponding to an arbitrary code group. The method of claim 10, wherein step c) When the power value of the specific frequency domain is larger than the predetermined setting value, the plurality of code groups are obtained by acquiring slot synchronization through P-SCH search and frame synchronization through S-SCH search. The base station information setting method of the femtocell base station characterized in that the selection. The method of claim 12, wherein d) The method of setting base station information of a femtocell base station, characterized in that the scrambling code is detected in a specific code group which is not in use among the identified plurality of code groups. The method of claim 12, wherein d) And detecting the scrambling code in an unused state from a code group having the minimum power among the plurality of code groups when the identified code groups are in use.

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