KR101750466B1 - Small Cell-Based Communication System - Google Patents

Abstract

The present invention relates to a small-cell-based communication system, in which an integrated repeater converts a wired signal received from an Internet network through one or more femto modules to a digital signal, selects a compatible signal frame The digital signal processing unit processes the digital signal based on the signal frame, converts the processed digital signal into an optical signal, and provides a communication service to an area in which the remote repeater is installed, It is possible to simplify the configuration so as to reduce the construction cost and reduce the configuration, thereby providing a communication system that is easy to maintain.

Description

[0001] Small Cell-Based Communication System [

The present invention relates to a small-cell-based communication system, and more particularly, to a small-cell-based communication system that receives a wired signal from an Internet network using a small cell source module, in particular, a femto module, To a communication service system that provides a communication service that can be converted and distributed to a plurality of spaces in a building through an optical cable.

In the domestic mobile communication market, mobile devices such as smart phones and tablet PCs are spreading rapidly, and mobile data traffic explosion is emerging as a challenge for the mobile communication industry. Recently, domestic mobile communication service providers are trying to compete with service providers in order to increase the transmission speed. Accordingly, an effective traffic distribution means is required.

Generally, DU (Digital Unit), RIU (Radio Interface Unit) and DAS (Distribute Antenna System) are used to build a network of mobile communication services in the building.

DAS can be composed of MHU (Master Hub Unit) and ROU (Remote Optic Unit). In this case, the DU transmits the optical signal to the RIU through the optical cable, and the MHU transmits the signal received from the RIU through the RF cable to the ROU through the optical cable after photoelectric conversion. In the ROU, filtering and amplification are performed to eliminate shaded areas in the building.

In order to construct such a service, a lot of communication wiring is necessary in the building between the equipments, and a space for installing various equipments is also required for building services by using optical cables or RF cables. When the service frequency is changed, it must be rebuilt as new equipment.

In order to build such a service, a plurality of equipment configurations are required, which causes a lot of construction costs and maintenance objects. In addition, there is a problem that the reconstruction cost is further increased when the service use frequency is changed.

Korean Registered Patent No. 10-1177943 (titled: In-Building System and In-Building System, Service Area Adjustment Method, Aug. 22, 2012)

In order to solve the above-described problems, the present invention provides a wireless communication system that receives a wired signal from the Internet via a femto module connected to the Internet via UTP or optical cable, converts the wired signal into a digital signal, ), Converts the processed digital signal into an optical signal, and provides the communication service to a plurality of spaces in the building through a remote relay device (ROU) Cell-based in-building communication system that can simplify the configuration so as to be able to be serviced in a short period of time, thereby reducing the construction cost and reducing the configuration, thereby facilitating maintenance.

In particular, the present invention provides a communication system capable of efficiently processing traffic distribution and frequency change according to the operating environment by easily adding a femto module according to the number of users or frequency of use.

However, the object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description.

According to an aspect of the present invention, there is provided an integrated repeater comprising: at least one femto module connected to an Internet network and converting a wired signal received from the Internet network into a digital signal and transmitting the digital signal to a digital processor; A digital processor for selecting one of the one or more signal frames from the at least one femto module and transmitting the selected digital signal to the distributor; And a distribution unit for converting the digital signal received from the digital processing unit into an optical signal and distributing the optical signal to one or more remote relay apparatuses.

In this case, the femto module may receive a wire signal from the internet network via UTP or optical cable, and the digital processor may include a clock selector for selecting a clock according to a remote relay device to which the received signal is to be transmitted. And a frame selector for selecting a signal frame compatible with the remote relay corresponding to the clock selected by the clock selector. The digital processor may further include a signal selector for selecting a signal, which is received from the femto module, And a filter unit for filtering the input signal in a range of a band.

According to an aspect of the present invention, there is provided a communication system including a communication module for converting a wired signal received from the Internet into a digital signal through a femto module, An integrated repeater for converting the digital signal into an optical signal based on the signal frame and distributing the optical signal to one or more remote repeaters; And at least one remote relay device for providing a communication service to an area where the remote relay device is installed based on the optical signal received from the integrated relay device.

According to the present invention, the integrated repeater converts a wired signal received from the Internet network through one or more femto modules into a digital signal, selects a compatible signal frame to be installed in the installed remote repeater, And then converts the processed digital signal into an optical signal to provide a communication service to an area where the remote relay apparatus is installed, thereby simplifying and simplifying the configuration so as to be compatible with a previously installed remote relay apparatus (ROU) It is possible to provide a communication system that can be easily maintained by reducing the cost and reducing the configuration.

In particular, the femto module can be easily installed according to the number of users or the frequency of use, so that the traffic distribution and the use frequency change can be efficiently processed according to the operating environment.

1 is a diagram illustrating a main configuration of a communication system according to an embodiment of the present invention.
2 is a block diagram showing the configuration of an integrated repeater according to the present invention.
3 is a block diagram showing a configuration of a digital processing unit of an integrated repeater according to the present invention.
4 is a flowchart illustrating an operation procedure of the communication system according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS For a more complete understanding of the nature and advantages of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings, in which:

In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

The terms and words used in the following description and drawings are not to be construed in an ordinary sense or a dictionary, and the inventor can properly define his or her invention as a concept of a term to be described in the best way It should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

Also, terms including ordinal numbers such as first, second, etc. are used to describe various elements, and are used only for the purpose of distinguishing one element from another, Not used. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component.

Also, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It is also to be understood that the terms such as " comprising "or" having ", as used herein, are intended to specify the presence of stated features, integers, It should be understood that the foregoing does not preclude the presence or addition of other features, numbers, steps, operations, elements, parts, or combinations thereof.

Also, the terms "part," "module," and the like, which are described in the specification, refer to a unit for processing at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software. Also, the terms " a or ", "one "," the ", and the like are synonyms in the context of describing the invention (particularly in the context of the following claims) May be used in a sense including both singular and plural, unless the context clearly dictates otherwise.

In addition to the above-described terms, certain terms used in the following description are provided to facilitate understanding of the present invention, and the use of such specific terms may be changed to other forms without departing from the technical idea of the present invention.

In the communication system according to the embodiment of the present invention, the KELIS, ELMO, WaLTS and UDBIS-L repeaters are described as an example. In addition, any repeater capable of serving as a ROU (Remote Optical Unit) It can be implemented.

Now, a communication system according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram for explaining a structure of an in-building communication system according to an embodiment of the present invention.

Referring to FIG. 1, an in-building communication system according to an embodiment of the present invention may include at least one remote relay apparatus 300 and an integrated relay apparatus 400.

The integrated repeater 400 according to the embodiment of the present invention is not only interworked with the base station 200 wirelessly but also wirelessly connected to the Internet 200 100).

At this time, the integrated repeater 400 may be connected to the Internet network 100 through UTP (Unshielded Twisted Pair Cable) or an optical cable to receive the wired signal.

Here, the Internet network 100 refers to a publicly available communication network in which information is exchanged according to the TCP / IP protocol, that is, a public network.

The base station 200 includes a base station (BS), a base transceiver station (BTS), a NodeB, an eNodeB, and the like, for connecting a network and a terminal communication device for wireless communication services.

An integrated repeater 400 connected to the Internet 100 via a wire such as UTP or optical cable converts a wired signal received from the Internet 100 into a digital signal and outputs the converted digital signal to one And converts the digital signal included in the signal frame into an optical signal and distributes the optical signal to one or more remote repeaters 300.

In this case, the remote relay apparatus 300 may also be referred to as an ROU (Remote Optical Unit). In the communication system according to the embodiment of the present invention, a conventional remote relay apparatus such as KELIS, ELMO, WaLTS, DBIS- 300) can be used.

However, if the KELIS, the ELMO, and the WaLTS are the remote relay device 300, it is possible to interchange the signal frames with each other. However, when the DBIS-L is the remote relay device 300, compatibility with KELIS, ELMO, WaLTS is difficult , The integrated repeater 400 selects a clock and a signal frame according to the type of the remote repeater 300 to which the signal is to be transmitted.

This will be described in detail with reference to FIG. 2 and FIG.

Upon receiving the converted optical signal, the remote relay apparatus 300 provides a communication service to an area where the remote relay apparatus 300 is installed based on the received optical signal.

The structure of the in-building communication system according to the embodiment of the present invention has been described above.

Hereinafter, the integrated relay apparatus 400 according to the present invention will be described.

FIG. 2 is a block diagram showing the main configuration of the integrated relay apparatus 400, and FIG. 3 is a block diagram showing a main configuration of the digital processing unit 450, which is a component of the integrated relay apparatus 400.

2, the integrated relay apparatus 400 may include an RF module 410, a femto module 430, a digital processing unit 450, and a distribution unit 470.

The RF module 410 is a high frequency unit that integrates the transmitting and receiving high-frequency circuit units of the communication device and converts the signal into a high-frequency signal so that the signal frequency can be sent away from the base station 200, Of the module.

In the present invention, the RF module 410 may receive a radio signal from the base station 200 and transmit the received radio signal to the digital processing unit 450.

The femto module 430 is a communication module that transmits / receives a communication signal based on a femtocell, and processes the communication signal. The femto module 430 is connected to the Internet network 100 by UTP or optical cable, Converts the received wire signal into a digital signal, and transmits the converted digital signal to the digital processing unit 450.

In this case, in the integrated repeater 400 according to the present invention, one or more femto modules 430 may be installed. By installing such a femto module 430 in the integrated repeater 400, To the Internet network 100 while making it compatible with the existing remote relay apparatus 300.

In addition, in the case of the femto module 430, it is easy to additionally mount the femto module 430 according to the number of users and the frequency of use. Thus, it is possible to efficiently distribute traffic according to the environment in which the communication system is operated, have.

The digital processing unit 450 receiving the digital signal converted by the femto module 430 selects one of the one or more signal frames and transmits the digital signal to the distribution unit 470. The digital processing unit 450, Will be described in detail with reference to FIG.

The digital processing unit 450 includes a filter unit 451, a clock selection unit 453, a frame selection unit 455, a DSP (Digital Signal Processor) 457, and a frequency signal synchronization unit 459 And the like.

The filter unit 451 receives a digital signal from the femto-module 430 and filters the digital signal in a range of a predetermined peak-to-peak ratio and a signal band.

Performing this filtering is intended to increase the efficiency of the RF module (not shown) included in the remote relay apparatus 300. The filter unit 451 performs a Crest-Factor Reduction Algorithm, In order to reduce the PAPR (Peak-to-Average Power Ratio) of the forward signal, that is, the digital signal received from the femto module 430 to a level desired by the user, and to improve the signal outside the service signal band, Channel filtering can be performed in accordance with the channel.

The digital signal filtered by the filter unit 451 is transmitted to a clock selection unit 453 and the clock selection unit 453 selects a clock according to the remote relay apparatus 300 to which the received signal is to be transmitted .

For example, KELIS, ELMO, and WaLTS repeaters 300, which are conventional remote repeaters 300, are compatible with each other and have the same clocks. However, UDBIS-L repeaters are compatible with KELIS, ELMO, and WaLTS repeaters The clock selection unit 453 selects a clock according to whether the remote relay apparatus 300 to which the signal is to be transmitted is a KELIS, an ELMO, a WaLTS repeater, or a UDBIS-L repeater.

That is, the clock selection unit 453 selects whether the signal is selected by the KELIS, ELMO, WaLTS repeater, or the UDBIS-L repeater.

In accordance with this selection, the converted digital signal is transmitted to the frame selecting unit 455, and the frame selecting unit 455 selects the clock signal corresponding to the clock selected by the clock selecting unit 453, which is compatible with the remote repeater 300 Select a signal frame.

For example, in the case of KELIS, ELMO, and WaLTS repeaters, the signal frames can be compatible. Therefore, if a WaLTS repeater is selected, the KELIS and ELMO repeaters can be serviced by changing the frame to the WaLTS repeater.

However, since the UDBIS-L repeater is not compatible with the KELIS, ELMO, and WaLTS repeaters, a signal frame corresponding to the UDBIS-L repeater should be selected and transmitted to the distributor 470.

In other words, KELIS, ELMO, WaLTS repeater and UDBIS-L repeater transmit signals through different signal frames, but KELIS, ELMO, and WaLTS repeaters are compatible with each other so that one of three repeaters can be selected The UDBIS-L repeater selects a signal frame corresponding to the UDBIS-L repeater and transmits the signal to the UDBIS-L repeater 300. The UDBIS- .

When a signal frame is selected, the frame selecting unit 455 sets the digital signal according to the selected signal frame and transmits it to the distributor 470.

The DSP 457 processes external noise, processing speed, and bandwidth limitation of the digital signal. The frequency signal synchronization unit 459 synchronizes the frequency signal from the external terminal.

The distribution unit 470 receiving the digital signal processed by the digital processing unit 450 converts the digital signal into an optical signal and distributes the optical signal to one or more remote relay apparatuses 300.

At this time, the remote relay apparatus 300 receiving the converted optical signal may be a remote relay apparatus 453 corresponding to the clock selected by the clock selection unit 453 of the digital processing unit 450.

The integrated relay apparatus 400 according to the present invention has been described above.

Hereinafter, an operation process of the integrated repeater 400 according to the embodiment of the present invention will be described.

4 is a flowchart illustrating an operation of the integrated repeater 400 according to an embodiment of the present invention.

When the integrated repeater 400 connected to the Internet network 100 through the UTP or optical cable receives the wire signal from the Internet network 100 in step S101, the femto module 430 of the integrated repeater 400 The digital signal processing unit 450 converts the received wired signal into a digital signal (S103), and the converted digital signal is filtered by the filter unit 451 of the digital processing unit 450 (S105) The clock selection unit 453 of the digital processing unit 450 selects a clock corresponding to the clock signal 300 (S107).

After selecting the clock, the frame selector 455 of the digital processing unit 450 receiving the digital signal selects a signal frame compatible with the remote relay apparatus 300 corresponding to the selected clock, (S109). The distribution unit 470 converts the digital signal into an optical signal (S111), and transmits the optical signal to the selected remote relay apparatus 300 (S113).

The operation of the integrated repeater 400 according to the embodiment of the present invention has been described above.

The small-cell-based building communication system according to the above-described embodiment of the present invention is based on the case where data is transmitted in the forward direction.

That is, the integrated repeater 400 that receives the wire signal received from the Internet network 100 converts and processes the wired signal into a digital signal, and then the distribution unit converts the processed digital signal into an optical signal, Based on the process in which the device 300 transmits a signal to the user terminal device.

However, in the small-cell-based building communication system according to the embodiment of the present invention, the integrated relay apparatus 400 transmits the reverse data transmission, that is, the optical signal transmitted from the remote relay apparatus 300 to the signal transmitted from the user terminal apparatus After the digital signal processing, the digital signal can be converted into a wire signal through the femto module 430 and transmitted to the Internet network 100.

In this case, the reverse data transmission process may be implemented as an inverse process of the data process described with reference to FIGS.

As described above, the present specification contains details of a number of specific implementations, but they should not be construed as being limitations on the scope of any invention or claimability, but rather on the particular embodiment of a particular invention But should be understood as an explanation of the features. Certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Further, although the features may operate in a particular combination and may be initially described as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, Or a variant of a subcombination.

Likewise, although the operations are depicted in the drawings in a particular order, it should be understood that such operations must be performed in that particular order or sequential order shown to achieve the desired result, or that all illustrated operations should be performed. In certain cases, multitasking and parallel processing may be advantageous. Also, the separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and systems will generally be integrated together into a single software product or packaged into multiple software products It should be understood.

Certain embodiments of the subject matter described herein have been described. Other embodiments are within the scope of the following claims. For example, the operations recited in the claims may be performed in a different order and still achieve desirable results. By way of example, the process illustrated in the accompanying drawings does not necessarily require that particular illustrated or sequential order to obtain the desired results. In certain implementations, multitasking and parallel processing may be advantageous.

The description sets forth the best modes of the present invention and provides examples for the purpose of illustrating the invention and enabling a person skilled in the art to make and use the invention. The written description is not intended to limit the invention to the specific terminology presented. Thus, while the present invention has been described in detail with reference to the above examples, those skilled in the art will recognize that modifications, changes, and modifications can be made thereto without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited by the described embodiments but should be defined by the claims.

The present invention relates to a small-cell-based communication system, in which an integrated repeater converts a wired signal received from an Internet network through one or more femto modules to a digital signal, selects a compatible signal frame The digital signal processing unit processes the digital signal based on the signal frame, converts the processed digital signal into an optical signal, and provides a communication service to an area in which the remote repeater is installed, It is possible to simplify the configuration so as to reduce the construction cost and reduce the configuration, thereby providing a communication system that is easy to maintain.

In particular, the femto module can be easily installed according to the number of users or the frequency of use, so that the traffic distribution and the use frequency change can be efficiently processed according to the operating environment.

Therefore, the present invention can contribute to the development of the in-building communication system through the above-described communication system, and the possibility of commercial use or business is not only sufficient but also practically possible to be practically used.

100: Internet network 200: Base station 300: Remote relay device
400: Integrated repeater

Claims (5)

At least one femto module connected to the Internet network and converting wired signals received from the Internet network into digital signals;
A digital processor for selecting one of the one or more signal frames from the one or more femto modulated digital signals; And
And a distributor for converting a digital signal for a signal frame selected from the digital processor into an optical signal and distributing the optical signal to one or more remote repeaters,
The digital processing unit includes:
A filter unit for filtering the digital signal converted from the femto module in a predetermined range of a crest factor and a signal band;
A clock selector for selecting a clock according to a case where the remote relay apparatus for transmitting the filtered digital signal from the filter unit is a KELIS, an ELMO, and a WaLTS repeater and a UDBIS-L repeater; And
A frame selector for selecting a signal frame compatible with a remote relay corresponding to a clock selected from the clock selector;
And an integrated relay device. The apparatus of claim 1, wherein the femto module
And receives the wired signal from the Internet through the UTP or optical cable. delete delete A wired signal received from the Internet network is converted into a digital signal through a femto module, and one of the one or more signal frames is selected through the digital processing unit, An integrated repeater for converting a digital signal into an optical signal through a distribution unit and distributing the optical signal to one or more optical signals; And
And at least one remote relay device for providing a communication service based on the optical signal received from the integrated relay device,
The digital processing unit includes:
A filter unit for filtering the digital signal converted from the femto module in a predetermined range of a crest factor and a signal band;
A clock selector for selecting a clock according to a case where the remote relay apparatus for transmitting the filtered digital signal from the filter unit is a KELIS, an ELMO, and a WaLTS repeater and a UDBIS-L repeater; And
A frame selector for selecting a signal frame compatible with a remote relay corresponding to a clock selected from the clock selector;
The communication system comprising:

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