KR20150125269A - Common public radio interface integrated mobile communication relay system and method thereof - Google Patents

Abstract

The present invention relates to a system for relaying a common public radio interface (CPRI) integrated mobile communications, which integrates the CPRI of a base station (BS) in self-service type, a digital unit (DU) in unserviced type, a remote radio head (RRH) or a remote unit (RU) which are signal sources of several providers, in order to transmit the same through a single optical line, and method thereof. Using the BS or the DU of a plurality of providers as main equipment, a main device of the present invention receives a CPRI signal from the DU of the providers or a remote unit (RRH or RU) through an optical line (input terminal) to extract mobile communications data and then transmits the same to the remote unit of the present invention through the single optical line (output terminal).Inversely, the remote unit receives a radio service signal from terminals of the providers to digitalize and integrate the same in order to transmit the same to the optical line, and the main device converts the same into the CPRI signal again to transmit the same to the DU or the remote unit (RRH or RU) of the providers. Accordingly, the system of the present invention can effectively operate the costs of facilities and the optical line, improve the quality of a radio service under a shadow area or the inside of a building environment, and contribute to benefits of maintenance and costs reduction.

Description

[0001] The present invention relates to a common public air interface integrated mobile communication relay system,

The present invention relates to a common public air interface integrated mobile communication relay system and method thereof, and more particularly, to a public public air interface integrated mobile communication relay system using a common public radio interface (CPRI) of a signal origin self service type BS, a non- service type DU, an RRH, The present invention relates to a common public air interface integrated mobile communication relay system, and a method thereof, which enable transmission through a single optical line.

Wireless and mobile network operators are facing the constant challenge of building networks that can efficiently manage high data traffic growth rates. The enhanced level of mobility and multimedia content for end users has required an end-to-end network that supports both increased demand for broadband and fixed-rate Internet access with new services .

In addition, network operators must consider the most cost-effective evolution of networks for 4G services. Wireless and mobile technology standards are evolving toward higher bandwidth requirements for both maximum speed and increased cell throughput.

The latest standards to support them are HSPA +, WiMAX, TD-SCDMA and LTE. The upgrade of the network required to deploy a network based on these standards should balance the limited availability of new spectrum, leverage of existing spectrum, and assurance of the operation of all desired standards. All of this happens all the time in the transition phase, and this transition phase takes years.

In the RRH system using CPRI as shown in FIG. 1, a common public radio interface (CPRI) includes a base station main unit (BS) having a digital unit (DU) A remote radio head (RRH) 20, which is configured based on a standard protocol relating to a base station or a DU (Digital Unit) 10 and an interface between an RU (Rf Unit or Remote Unit) And the remote wireless head 20 is separated from the digital unit 11 and configured as an external device.

The conventional RRH system using CPRI is a device for performing a mobile communication service and is a device used for facilitating cell configuration in various ranges according to signal output through an optical connection medium.

Since the common public air interface (CPRI) must be directly linked with the base station, it is not easy for other companies other than the base station provider to access the common public air interface (CPRI).

Korean Patent Publication No. 10-2012-0106868 (titled " Highly Remotely Remotely Configurable Remote Wireless Head Unit System for Wireless Communication and its Method ", published on Sep. 26, 2012) US Publication No. 2012-0224541 (entitled " CLUSTERING METHOD OF MOBILE COMMUNICATION AND REMOTE RADIO HEAD THEREOF " Japanese Laid-Open Patent Application No. 2011-0097225 (entitled "Wireless Base Station and Wireless Communication Method ", published on May 12, 2011) U.S. Published Patent Application No. 2007-0160012 (filed on July 12, 2007, entitled " Method and apparatus for multi-antenna signal transmission in long-distance wireless bs &

In order to solve such a problem, the present invention integrates a common self-service type BS, non-service type DU, RRH, or RU common public radio interface (CPRI) And to provide a common public air interface integrated mobile communication relay system and a method thereof.

It is another object of the present invention to provide a common public air interface integrated mobile communication relay system and a method for extracting only mobile communication data from a common public air interface (CPRI) and enabling service through a remote device.

It is another object of the present invention to provide a common public air interface integrated mobile communication relay system and a method thereof, which can constitute an integrated remote device for each business entity and a sole remote device for each business entity.

A common public air interface integrated mobile communication relay system according to an embodiment of the present invention receives a common public air interface (CPRI) signal from a digital unit or a remote unit (RRH or RU) of a plurality of users via an optical line, A remote device connected to a master device and a master device for extracting mobile communication data from a public air interface (CPRI) signal through a single optical line and receiving the mobile communication data transmitted from the master device through a single optical line, . ≪ / RTI >

As an embodiment related to the present invention, the master value includes a first input optical interface unit receiving a common public air interface signal transmitted from each digital unit or remote unit (RRH or RU) A first signal processing unit for extracting and transmitting mobile communication data from a common public air interface signal to be transmitted, a first output optical interface unit for transmitting mobile communication data signal-processed by the first signal processing unit to a remote device, A first control unit for controlling the states of the input optical interface unit, the first signal processing unit, and the first output optical interface unit and monitoring whether the optical interface unit operates according to preset conditions, and a first power supply unit Lt; / RTI >

In an embodiment related to the present invention, the first signal processor extracts a clock signal from a common public air interface signal for each of a plurality of operators, synchronizes the extracted clock signal with a clock signal used in the master, After extracting the mobile communication (IQ) data, the extracted mobile communication (IQ) data can be converted into a frame corresponding to the standard and transmitted to the remote device.

As an embodiment related to the present invention, the first signal processor may convert the data rate to be transmitted to the remote device when the data rate of the extracted mobile communication (IQ) data is different.

In a preferred embodiment of the present invention, the remote device includes a second input optical interface for receiving mobile communication data transmitted from a host device, a second power supply for supplying driving power to the remote device, A second signal processor for receiving and processing the communication data, converting the frame into a frame for transmission to the terminal, and outputting the converted frame to the terminal, A DAC-ADC unit for converting an input analog signal into a digital signal and outputting the digital signal to a second signal processing unit, a DAC-ADC unit for transmitting the mobile communication signal input from the DAC- A second input optical interface unit, a second signal processing unit, a DAC-ADC unit, Controlling the state of the RF processing unit and may be made of a second control unit for monitoring whether or not the operation according to a preset condition.

As an embodiment related to the present invention, the remote device may be a remote device that is integrally operated for each vendor or a remote device that is independently operated for each vendor.

As an embodiment related to the present invention, the remote device may be installed in a shadow area or an in-building environment.

The common public air interface integrated mobile communication relaying method according to the embodiment of the present invention is a method for relaying the common public air interface integrated mobile communication relaying method according to the present invention to a common public air interface (CPRI) standard through an optical cable for each business from a digital unit or a remote device (RRH or RU) Frame, extracting a clock signal from the input signal, and synchronizing the extracted clock signal with an internal clock signal, wherein the master value is obtained from a common public air interface (CPRI) signal input for each provider Extracting mobile communication (IQ) data from the mobile communication (IQ) data and processing the mobile communication (IQ) data by digital signal processing when the extracted mobile communication (IQ) data is different, Configuring the signal into a frame for transmission to a remote device, And transmitting an impulse signal to the remote device via the optical line.

In the common public air interface integrated mobile communication relay method according to an embodiment of the present invention, the remote device extracts a clock signal from a frame signal transmitted from a master device, and synchronizes the extracted clock signal with an internal clock signal. Extracting mobile communication data from the frame signal input from the DAC-ADC unit, and performing digital signal processing for improving the quality of service of the service, converting the analog IF signal into an analog IF signal, and outputting the converted analog IF signal to the RF Converting the signal into an RF signal through a processing unit, and wirelessly transmitting the RF signal to the terminal through an antenna.

In the common public air interface integrated mobile communication relay method according to the embodiment of the present invention, the remote device converts the signal of the terminal input through the antenna into the analog IF through the RF processor, and the remote device converts the analog IF signal into the DAC- Converting the digital IF signal into a digital signal in order to improve the quality of service of the service, and then selecting a signal input from the lower remote device and the same signal for each provider, ), The remote device configuring a frame for transmitting the digital IF signal processed with the digital signal and the summing data of the lower remote device to the host, and the remote device configuring the frame signal to the optical line To the host device via the network.

A common public air interface integrated mobile communication relay method according to an embodiment of the present invention includes extracting data from a frame signal input from a remote device, Converting the data rate to transmit the summed data to the digital units according to the provider; and setting the master rate to the mobile communication (IQ) according to the common public air interface (CPRI) frame standard, ) Data into a frame and transmitting it to a digital unit or a remote unit (RRH or RU) according to the provider through the optical line.

The present invention integrates a common public radio interface (CPRI) of a plurality of carriers and enables transmission through a single optical line, thereby enabling efficient operation of the facility and the optical line. It is easy to maintain the equipment after installing the equipment and the cost reduction is great.

In addition, the present invention has an effect of allowing a separate repeater system to be operated by extracting only mobile communication data from a common public air interface (CPRI) and enabling service through a remote device.

In addition, the present invention can constitute an integrated remote device for each business entity and a sole remote device for each business entity, thereby making it possible to perform integrated operation or independent operation of each business entity. In particular, .

FIG. 1 is a view schematically showing a configuration of a remote wireless head system using a common public air interface.
FIG. 2 is a diagram schematically showing an embodiment of a common public air interface integrated mobile communication relay system according to the present invention.
3 is a detailed block diagram of the master key of FIG.
Figure 4 is a detailed block diagram of the remote device of Figure 2;
FIG. 5 is a flowchart illustrating a forward signal flow state in a master device of a common public air interface integrated mobile communication relay system according to the present invention.
6 is a flowchart illustrating a forward signal flow state in a remote apparatus of a common public air interface integrated mobile communication relay system according to the present invention.
FIG. 7 is a flowchart illustrating a reverse signal flow in a remote apparatus of a common public air interface integrated mobile communication relay system according to the present invention.
FIG. 8 is a flowchart illustrating a reverse signal flow according to the present invention in a common public air interface integrated mobile communication relay system according to the present invention.

It is noted that the technical terms used in the present invention are used only to describe specific embodiments and are not intended to limit the present invention. In addition, the technical terms used in the present invention should be construed in a sense generally understood by a person having ordinary skill in the art to which the present invention belongs, unless otherwise defined in the present invention, Should not be construed to mean, or be interpreted in an excessively reduced sense. In addition, when a technical term used in the present invention is an erroneous technical term that does not accurately express the concept of the present invention, it should be understood that technical terms can be understood by those skilled in the art. In addition, the general terms used in the present invention should be interpreted according to a predefined or prior context, and should not be construed as being excessively reduced.

Furthermore, the singular expressions used in the present invention include plural expressions unless the context clearly dictates otherwise. In the present invention, terms such as "comprising" or "comprising" and the like should not be construed as encompassing various elements or various steps of the invention, Or may further include additional components or steps.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or similar elements throughout the several views, and redundant description thereof will be omitted.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It is to be noted that the accompanying drawings are only for the purpose of facilitating understanding of the present invention, and should not be construed as limiting the scope of the present invention with reference to the accompanying drawings.

2 is a diagram schematically illustrating an embodiment of a common public air interface integrated mobile communication relay system according to the present invention. 3 is a detailed block diagram of the master key of FIG. Figure 4 is a detailed block diagram of the remote device of Figure 2;

The common public air interface integrated mobile communication relay system 100 receives a common public air interface (CPRI) signal from a digital unit or a remote device (RRH or RU) of a plurality of users through an optical line as shown in FIG. 2, A main unit 100 for extracting mobile communication data from a received common public air interface (CPRI) signal and transmitting the same via a single optical line, and a single optical line 130 connected to the main unit 100, And transmits the received mobile communication data to the terminal. That is, the signal source equipment according to each provider corresponds to the self service type BS, the non-service type DU, RRH or RU, BS and DU are operated by the master, and the RRH or RU is operated by the remote device.

3, the master unit 110 includes a first input optical interface unit 111 receiving a common public air interface signal transmitted from each digital unit or remote unit (RRH or RU) A first signal processing unit 112 for extracting and transmitting mobile communication data from a common public air interface signal that is made available through the use optical interface unit 111 and a second signal processing unit 112 for extracting mobile communication data processed by the first signal processing unit 112 A first output optical interface unit 113 for transmitting the first input optical interface unit 111, a first signal processing unit 112 and a first output optical interface unit 113 to the remote device 120, And a first power supply unit 115 for supplying driving power to all the components constituting the main unit 110. The first power supply unit 115 includes a first power supply unit 115,

The first signal processor 112 extracts a clock signal from a common public air interface signal for each of a plurality of operators, synchronizes the extracted clock signal with a clock signal used in the host 110, (IQ) data, converts the extracted IQ data into a frame conforming to the standard, and transmits the converted frame to the remote device 120.

The first signal processor 112 converts the data rate of the extracted mobile communication (IQ) data to be transmitted to the remote device 120 when the data rate is different.

4, the remote device 120 includes a second input optical interface unit 121 for receiving mobile communication data transmitted from the host device 110 and a second input optical interface unit 121 for receiving all the components constituting the remote device 120 A second signal processor 123 for receiving and processing the mobile communication data transmitted from the host 110, converting the signal into a frame for transmission to the mobile terminal, and outputting the frame, A DAC for converting mobile communication data converted into a frame by the second signal processor 123 into an analog signal and outputting the converted analog signal to the second signal processor 123, -ADC unit 124 and the DAC-ADC unit 124 to the antenna, or converts a signal received through the antenna to a frequency for output to the DAC-ADC unit 124 R F processing unit 125 and the second input optical interface unit 121, the second signal processing unit 123, the DAC-ADC unit 124, and the RF processing unit 125, And a second control unit 126 for monitoring whether or not it is possible to confirm whether or not it is the second control unit.

The remote device 120 is a remote device that is operated independently by each vendor or alone operated by each vendor, and the remote device 120 is installed in a shaded area.

The common public air interface integrated mobile communication relay system configured as described above will be described.

FIG. 5 is a flowchart illustrating a forward signal flow state in a master device of a common public air interface integrated mobile communication relay system according to the present invention. 6 is a flowchart illustrating a forward signal flow state in a remote apparatus of a common public air interface integrated mobile communication relay system according to the present invention. FIG. 7 is a flowchart illustrating a reverse signal flow in a remote apparatus of a common public air interface integrated mobile communication relay system according to the present invention. FIG. 8 is a flowchart illustrating a reverse signal flow according to the present invention in a common public air interface integrated mobile communication relay system according to the present invention.

As shown in FIG. 5, the forward signal flow state in the host device of the common public air interface integrated mobile communication relay system will be described. The host device 110 receives, from the digital unit or the remote wireless head, And receives a common public air interface signal composed of frames corresponding to the public air interface (CPRI) standard (S110).

Then, the master unit 110 extracts a clock signal from the input signal, and synchronizes the extracted clock signal with an internal clock signal (S120). The master unit 110 generates a synchronous clock signal from a common public air interface (CPRI) And extracts mobile communication (IQ) data (S130).

When the extracted mobile communication (IQ) data is different, the host 110 adjusts the data rate by performing digital signal processing (S140), and the host 110 transmits the signal converted to the same data rate to the remote device (S150), and then transmits the constructed frame signal to the remote device 120 through the optical line (S160).

6, the remote device 120 extracts a clock signal from the frame signal transmitted from the host device 100, and transmits the clock signal to the remote device 120 , And synchronizes the extracted clock signal with the internal clock signal (S210).

Then, the remote device 120 extracts mobile communication data from the frame signal input from the host device 110, performs digital signal processing for improving the communication quality of the service, and then transmits the digital signal through the DAC- (S220).

The remote device 120 converts the analog IF signal into an RF signal through the RF processor 125 and wirelessly transmits the RF signal to the terminal through the antenna (S230).

7, the remote device 120 transmits the signal of the terminal input through the antenna to the RF processor 125 (FIG. 7) To an analog IF (S310).

The remote device 120 converts the analog IF signal to a digital IF signal through the DAC-ADC unit 124 (S320), and the remote device 120 converts the digital IF signal into a digital signal And then performs a summing operation by selecting a signal input through the lower remote device and the same signal for each provider (S330).

Then, the remote device 120 forms a frame for transmitting the digital IF signal processed by the digital signal and the summing data of the lower remote device to the host device (S340), and transmits the constructed frame signal to the host device through the optical line (S350).

8, the main controller 110 extracts data from a frame signal input from the remote device 120 at step S410, and transmits the extracted data to the remote controller 120. In step S410, After that, data inputted from a plurality of remote devices is summed by service provider or service (S420).

The host 110 converts the data rate to transmit the summed data to the digital unit or remote unit (RRH or RU) according to the provider (S430), and the host 110 converts the data rate to the common public air interface (CPRI) (IQ) data is formed into frames in accordance with a frame standard and transmitted to a digital unit or a remote unit (RRH or RU) according to a provider through an optical line (S440).

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 essential characteristics thereof. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Common public air interface integrated mobile communication relay system
110: Host
111: first input optical interface unit
112: first signal processor
113: Optical interface unit for first output
114:
115: first power source driver
120: Remote device
121: second input optical interface unit
122: second power source driver
123: second signal processing unit 124: DAC-ADC unit
125: RF processor 126: second controller

Claims (11)

Receives a common public air interface (CPRI) signal from a digital unit or a remote device (RRH or RU) of a plurality of users through an optical line, extracts mobile communication data from the received common public air interface (CPRI) A master key to transmit through; And
And a remote device connected to the host device through a single optical line and receiving the mobile communication data transmitted from the host device and transmitting the mobile communication data to the terminal.
The method according to claim 1,
The master
A first input optical interface unit receiving a common public air interface signal transmitted from each digital unit or remote unit (RRH or RU)
A first signal processing unit for extracting and transmitting mobile communication data from a common public air interface signal to be received through the input optical interface unit,
A first output optical interface unit for transmitting the mobile communication data signal-processed by the first signal processing unit to the remote device,
A first control unit for controlling the states of the first input optical interface unit, the first signal processing unit, and the first output optical interface unit and monitoring whether the optical interface unit operates according to preset conditions;
And a first power supply unit for supplying driving power to the main power supply unit.
3. The method of claim 2,
The first signal processor extracts a clock signal from a common public air interface signal for each of a plurality of businesses, synchronizes the extracted clock signal with a clock signal used in the master device, Extracting the data, converting the extracted mobile communication (IQ) data into a frame corresponding to the standard, and transmitting the converted frame to the remote device.
5. The method of claim 4,
Wherein the first signal processing unit converts the data rate when the data rate of the extracted mobile communication (IQ) data is different, and transmits the converted data rate to the remote device.
The method according to claim 1,
The remote device
A second input optical interface unit for receiving mobile communication data transmitted from the host device,
A second power supply for supplying driving power to the remote device,
A second signal processor for receiving and processing the mobile communication data transmitted from the master device, converting the signal into a frame for transmission to the mobile terminal, and outputting the frame,
A DAC-ADC unit for converting mobile communication data converted into a frame by the second signal processing unit into an analog signal and outputting the analog signal, converting the analog signal input from the outside into a digital signal, and outputting the digital signal to the second signal processing unit,
An RF processor for transmitting a mobile communication signal input from the DAC-ADC unit to an antenna or converting a signal received through an antenna to a frequency for output to the DAC-ADC unit;
And a second control unit for controlling the states of the second input optical interface unit, the second signal processing unit, the DAC-ADC unit, and the RF processing unit, Integrated Mobile Communication Relay System.
The method according to claim 1,
Wherein the remote device is a remote device that is integrally operated for each business entity or a remote device that is independently operated for each business entity.
The method according to claim 6,
Wherein the remote device is installed in a shadow area and an in-building environment.
Receiving a signal from the digital unit or the remote device (RRH or RU) according to each provider in a form corresponding to a common public air interface (CPRI) standard through an optical cable;
Extracting a clock signal from the input signal and synchronizing the extracted clock signal with an internal clock signal;
Extracting mobile communication (IQ) data from a common public air interface (CPRI) signal input for each provider;
Wherein the controller is configured to digitally process the mobile communication (IQ) data when the extracted mobile communication (IQ) data is different, thereby adjusting a data rate;
The host device comprising: configuring a signal converted to the same data rate as a frame for transmission to a remote device; And
And transmitting the frame signal to the remote device via the optical line.
The remote device extracts a clock signal from the frame signal transmitted from the host and synchronizes the extracted clock signal with the internal clock signal;
The remote device extracts mobile communication data from the frame signal input from the host device, performs digital signal processing to improve the quality of service of the service, and converts the IF signal into an analog IF through a DAC-ADC unit. And
Wherein the remote device converts the analog IF signal to an RF signal through an RF processor and wirelessly transmits the RF signal to the terminal through an antenna.
Converting the signal of the terminal input through the antenna to an analog IF through the RF processing unit;
Converting the analog IF signal to a digital IF signal through a DAC-ADC unit;
The remote device processes the digital IF signal as a digital signal to improve the quality of service of the service, and then performs a summing operation by selecting a signal input through the lower remote device and the same signal for each provider;
The remote device configuring a frame for transmitting the digital IF signal processed with the digital signal and the summing data of the lower remote device to the host; And
Wherein the remote device comprises transmitting the configured frame signal to the host via an optical line.
Extracting data from a frame signal input from a remote device;
Wherein the host device comprises: Summing data input from a plurality of remote devices by service provider or service;
Converting the data rate to transmit the summed data to a digital unit according to a provider; And
The main unit includes mobile communication (IQ) data frames in accordance with a common public air interface (CPRI) frame standard and transmitting the frames to a digital unit or a remote unit (RRH or RU) Common public air interface integrated mobile communication relay method.

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