KR102155136B1 - Communication node, and operating method of the same - Google Patents

Abstract

According to an embodiment of the present invention, a communication node for transmitting a plurality of communication signals in a distributed antenna system comprises: a signal monitoring device for receiving a plurality of communication signals transmitted from at least one base station and monitoring a frequency band of each of the plurality of received communication signals; and a framer for framing into one frame by including the plurality of communication signals in a band slot corresponding to the frequency band of each of the plurality of communication signals according to a preset frame structure. Accordingly, there is an effect of effectively transmitting a plurality of communication signals.

Description

Communication node and its operation method {COMMUNICATION NODE, AND OPERATING METHOD OF THE SAME}

The present invention relates to a communication node and a method of operation thereof, and more particularly, a plurality of communication signals received from a base station are included in each of the band slots allocated for each frequency band in a preset frame structure and framed into one frame. A communication node capable of relocating a communication signal not included in the frame within a frame, and a method of operating the same.

The Distributed Antenna System (DAS) is a system capable of solving a problem in which a communication shadow area occurs or a problem in which high traffic is concentrated in a specific area by spatially distributing a plurality of antennas.

Distributed antenna systems are installed inside buildings, tunnels, subways, etc. to provide communication services even in areas where base station signals are difficult to reach, and to provide smooth communication services in stadiums, large facilities, and places with high demand for services. Is used.

The distributed antenna system may receive various communication signals from a plurality of base stations, and may framing the received signals and distribute them to various locations.

Accordingly, there is a need for a method to increase efficiency in a process of framing signals of different frequency bands in a distributed antenna system.

The technical problem to be achieved by the present invention is to include a plurality of communication signals received from a base station in each of the band slots allocated for each frequency band in a preset frame structure, and frame the frame into one frame, but the communication signal not included in the frame is included in the frame. It is to provide a communication node that can be relocated in and a method of operation thereof.

A communication node that transmits a plurality of communication signals in a distributed antenna system according to an embodiment of the present invention receives the plurality of communication signals transmitted from a base station, and monitors the frequency band of each of the received communication signals. And a framer configured to frame the plurality of communication signals into one frame by including the plurality of communication signals in a band slot corresponding to each frequency band of the plurality of communication signals according to a signal monitoring device and a preset frame structure, wherein the framer is In addition, among the plurality of communication signals, a communication signal that is not included in the frame may be included in the frame at a position different from the position according to the preset frame structure to be framed as the one frame.

In some embodiments, the preset frame structure may include a plurality of band slots each allocated to a predetermined frequency band.

In some embodiments, each of the plurality of band slots in the preset frame structure includes a plurality of sub-band slots, each of which is allocated to each of the detailed frequency bands in a frequency band corresponding to each of the plurality of band slots. Can include.

In some embodiments, the framer includes a communication signal not included in the frame among the plurality of communication signals in a subband slot different from the subband slot in the band slot according to the preset frame structure in the frame. It can be framed with the one frame.

In some embodiments, the framer includes a communication signal that is not included in the frame among the plurality of communication signals in a band slot different from the band slot according to the preset frame structure in the frame as the one frame. Can be framed.

In some embodiments, according to a result of monitoring the frequency bands of each of the plurality of communication signals received, a frame setter for resetting the preset frame structure may be further included.

In some embodiments, the frame setter, according to a result of monitoring the frequency bands of each of the plurality of received communication signals, is at least one of a frequency at which reception of a communication signal is repeated for each frequency band and an amount of data of a received communication signal. You can judge any one.

In some embodiments, the frame setter allocates a band slot of a relatively large space in the frame structure for a frequency band in which the frequency of reception of a communication signal is repeated or a data amount of a received communication signal is relatively large. can do.

In some embodiments, the preset frame structure may be a structure in which each of a plurality of band slots is allocated with a size for each frequency band corresponding to the location information based on location information in which the communication node is installed.

A method of operating a communication node according to an embodiment of the present invention includes the steps of receiving a plurality of communication signals transmitted from a base station, monitoring a frequency band of each of the received communication signals, and each of which is allocated for each frequency band. In accordance with a preset frame structure including a plurality of band slots, including the plurality of communication signals in a band slot corresponding to a frequency band of each of the plurality of communication signals and framing into one frame, In the framing step, a communication signal that is not included in the frame among the plurality of communication signals may be included in the frame at a position different from a position according to the preset frame structure, and the frame may be framed as the one frame.

The method and apparatus according to an embodiment of the present invention include a plurality of communication signals received from a base station in each of the band slots allocated for each frequency band in a preset frame structure, and frame them into one frame, but the communication signals not included in the frame. By rearranging in the frame, there is an effect of effectively transmitting a plurality of communication signals.

Brief description of each drawing is provided in order to more fully understand the drawings cited in the detailed description of the present invention.
1 is a block diagram according to an embodiment of a distributed antenna system according to an embodiment of the present invention.
2 is a block diagram illustrating a partial configuration of the headend device shown in FIG. 1 by way of example.
3 is a block diagram according to an embodiment of the headend combiner/distributor shown in FIG. 2.
FIG. 4 is a diagram illustrating a frame structure used in a communication signal framing process of the headend combiner/distributor shown in FIG. 3.
5 is a flowchart of a method of operating a communication node according to an embodiment of the present invention.

The technical idea of the present invention is that various changes may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the technical idea of the present invention to a specific embodiment, it should be understood to include all changes, equivalents, and substitutes included in the scope of the technical idea of the present invention.

In describing the technical idea of the present invention, when it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, numbers (eg, first, second, etc.) used in the description of the present specification are merely identification symbols for distinguishing one component from another component.

In addition, in the present specification, when one component is referred to as "connected" or "connected" to another component, the one component may be directly connected or directly connected to the other component, but specially It should be understood that as long as there is no opposing substrate, it may be connected or may be connected via another component in the middle.

In addition, terms such as "~ unit", "~ group", "~ character", and "~ module" described in the present specification mean a unit that processes at least one function or operation, which is a processor or microcomputer. Processor (Micro Processer), Micro Controller, CPU (Central Processing Unit), GPU (Graphics Processing Unit), APU (Accelerate Processor Unit), DSP (Drive Signal Processor), ASIC (Application Specific Integrated Circuit), FPGA It may be implemented in hardware or software such as (Field Programmable Gate Array), or a combination of hardware and software, and may be implemented in a form combined with a memory that stores data necessary for processing at least one function or operation. .

In addition, it is intended to clarify that the division of the constituent parts in the present specification is merely divided by the main function that each constituent part is responsible for. That is, two or more constituent parts to be described below may be combined into one constituent part, or one constituent part may be divided into two or more according to more subdivided functions. In addition, each of the constituent units to be described below may additionally perform some or all of the functions of other constituent units in addition to its own main function, and some of the main functions of each constituent unit are different. It goes without saying that it may be performed exclusively by.

The distributed antenna system according to an embodiment according to the technical idea of the present invention is a coverage system for an in-building service that delivers voice communication and data communication with high quality and seamless access. In addition, it is a system for servicing analog and digital telephone systems serving within a plurality of bands with at least one antenna.

The distributed antenna system according to an embodiment according to the technical idea of the present invention improves a poor radio wave environment in a building, and has poor received signal strength (RSSI) and Ec/, which is the overall reception sensitivity of the mobile terminal. It improves Io (chip energy/others interference) and provides mobile communication to corners of the building, allowing communication service users to freely make calls anywhere in the building.

The distributed antenna system according to an embodiment according to the technical idea of the present invention may support mobile communication standards used worldwide. For example, the distributed antenna system includes frequencies such as very high frequency (VHF), ultra high frequency (UHF), 700MHz, 800MHz, 850MHz, 900MHz, 1900MHz, 2100MHz band, and 2600MHz band, and FDD-type services. In addition, it can support a TDD type service. In addition, the distributed antenna system is a representative analog mobile communication service (Advanced Mobile Phone Service, AMPS), digital time-division multiplexing access (TDMA), code division multiple access (CDMA), Asynchronous CDMA (Wideband Code Division Multiple Access, WCDMA), High Speed Downlink Packet Access (HSDPA), Long Term Evolution (LTE), Long Term Evolution Advanced (LTE-A), It can support a number of mobile communication standards such as 5G.

Hereinafter, embodiments according to the technical idea of the present invention will be described in detail in order.

1 is a block diagram according to an embodiment of a distributed antenna system according to an embodiment of the present invention.

Referring to FIG. 1, a Distributed Antenna System (DAS) 200 is communicatively connected to a plurality of base stations (Base Transceiver Stations (BTS), 100-1 to 100-n), and a headend node A plurality of remote devices that form a headend device 210 and a remote node that form a (headend node) and are connected to other remote nodes or are located at each remote service location and are communicatively connected to the user terminal It may include (220a, 220b, 220c, 220d), extension devices (230a, 230b) constituting an extension node (extension node).

Each of the headend device 210, a plurality of remote devices 220a, 220b, 220c, 220d, and extension devices 230a, 230b may constitute a communication node for transmitting communication signals in a distributed antenna system. have.

According to an embodiment, the distributed antenna system 200 may be implemented as an analog distributed antenna system.

According to another embodiment, the distributed antenna system 200 may be implemented as a digital distributed antenna system, and in some cases, it is a hybrid type (for example, some nodes perform analog processing and other nodes perform digital processing). It can also be implemented.

According to another embodiment, the distributed antenna system 200 includes some configurations of the plurality of base stations 100-1 to 100-n or performs some functions of the plurality of base stations 100-1 to 100-n. You can also do it.

Meanwhile, FIG. 1 shows an example of a topology of the distributed antenna system 200, and the distributed antenna system 200 includes an installation area and an application field (eg, In-Building, Subway). , Hospital, Stadium, etc.), various modifications are possible. For example, the number of headend devices 210, remote devices 220a, 220b, 220c, 220d, and expansion devices 230a and 230b, and a connection relationship between the upper and lower ends thereof may be different from that of FIG. 1.

In the distributed antenna system 200, the expansion devices 230a and 230b may be utilized when the number of branches of the headend device 210 is limited compared to the number of remote devices required to be installed.

Each node in the distributed antenna system 200 and its functions will be described in more detail. First, the headend device 210 may serve as an interface with the base station. In FIG. 1, the headend device 210 is shown to be connected to a plurality of base stations 100-1 to 100-n, where n is a natural number of 2 or more.

Depending on the embodiment, the headend device 210 may be implemented as a main headend device and a subheadend device to be connected to a base station for each service frequency band or for each sector of a specific operator. In some cases, the main headend device may be Coverage may be supplemented by a headend device.

In general, since the RF (Radio Frequency) signal transmitted from the base station is a high power signal, the headend device 210 can attenuate such a high power RF signal into a signal of power suitable for processing at each node. have. The headend device 210 may reduce the high power RF signal for each frequency band or for each sector to low power. The headend device 210 may combine a low-power RF signal, and may serve to distribute the combined signal to the expansion device 230a or the remote device 220a.

According to an embodiment, the headend device 210 may receive and process a signal in a digital format (eg, CPRI, OBSAI, ORI, etc.) from each of the plurality of base stations 100-1 to 100-n.

According to another embodiment, the headend device 210 may directly receive and process a baseband signal from each of the plurality of base stations 100-1 to 100-n.

A detailed structure and operation of the headend device 210 will be described later with reference to FIG. 2.

Each of the remote devices 220a, 220b, 220c, and 220d may separate the received combined signal for each frequency band and perform signal processing such as amplification. Accordingly, each of the remote devices 220a, 220b, 220c, 220d may transmit a base station signal to a user terminal within its service coverage through a service antenna (not shown).

The remote device 220a and the remote device 220b may be connected through an RF cable or wireless communication, and if necessary, a plurality of remote devices may be connected in a cascade structure.

The expansion device 230a may transmit the received combined signal to the remote device 220c connected to the expansion device 230a.

The expansion device 230b is connected to one end of the remote device 220a, and may receive a signal transmitted from the headend device 210 in downlink communication through the remote device 220a. In this case, the expansion device 230b may transmit the received signal back to the remote device 220d connected to the rear end of the expansion device 230b.

Meanwhile, in FIG. 1, a plurality of base stations 100-1 to 100-n and the headend device 210 are interconnected by wire, and at the lower end of the headend device 210, the remote device 220a and the remote device Except for the devices 220b, it is shown that they are interconnected through an optical cable, but a signal transport medium or a communication method between nodes may be variously modified.

For example, between the headend device 210 and the expansion device 230a, between the headend device 210 and some remote devices 220a, the expansion devices 230a and 230b and some other remote devices 220c and 220d At least one of the connections may be implemented in a manner that is connected through an RF cable, a twist cable, a UTP cable, in addition to an optical cable.

However, hereinafter, it will be described with reference to FIG. 1. Therefore, in the distributed antenna system 200, the headend device 210, the remote devices 220a, 220b, 220c, 220d, and the extension devices 230a, 230b transmit and receive an optical type signal through all-optical conversion/photoelectric conversion. For example, an optical transceiver module may be included, and when the nodes are connected by a single optical cable, a wavelength division multiplexing (WDM) device may be included.

The distributed antenna system 200 may be connected to an external management device (not shown), for example, a Network Management Server or Network Management System (NMS) 300, a Network Operation Center (NOC), or the like through a network. Accordingly, the administrator can remotely monitor the status and problems of each node of the distributed antenna system, and remotely control the operation of each node.

2 is a block diagram illustrating a partial configuration of the headend device shown in FIG. 1 by way of example.

Referring to FIG. 2, the headend device 210 includes first to nth base station interfaces 211-1 to 211-n, where n is a natural number greater than or equal to 2), a headend combiner/divider 212, and first to nth base station interfaces. It may include m headend optical transceivers 213-1 to 213-m, where m is a natural number of 2 or more and a headend controller 214.

Each of the first to nth base station interfaces 211-1 to 211-n may be connected to a corresponding base station among the first to nth base stations 100-1 to 100-n. However, the present invention is not limited thereto, and in another embodiment, at least two or more of the first to n-th base station interfaces 211-1 to 211-n may include the first to nth base stations 100-1 to 100-n. ) May be connected to any one of the base stations.

Each of the first to nth base station interfaces 211-1 to 211-n may receive a downlink signal from a corresponding base station among the first to nth base stations 100-`1 to 100-n. Downlink signals received by each of the first to nth base station interfaces 211-1 to 211-n may have different frequency bands.

Each of the first to nth base station interfaces 211-1 to 211-n may output to the headend combiner/distributor 212 by adjusting the power of the input downlink signal. For example, each of the first to nth base station interfaces 211-1 to 211-n may reduce the power of the input downlink signal and transmit the reduced power downlink signal to the headend combiner/divider 212. Can be printed.

Each of the first to nth base station interfaces 211-1 to 211-n may receive a plurality of combined uplink transmission signals from the headend combiner/distributor 212. Here, the combined uplink transmission signals are combined by the headend combiner/divider 212 of the uplink transmission signals output from the first to mth headend optical transceivers 213-1 to 213-m to be described later. It may be a signal. Each of the uplink transmission signals is of different frequency bands received from user terminals by the remote devices 220c and 220d through the remote device 220a or the extension device 230a directly connected to the headend device 210. It may include uplink signals. Each of the first to nth base station interfaces 211-1 to 211-n receives an uplink signal corresponding to a preset frequency band (eg, a frequency band of an input downlink signal) from a plurality of combined uplink transmission signals. Can be extracted.

Each of the first to nth base station interfaces 211-1 to 211-n may adjust the power of the extracted uplink signal and output it to a corresponding base station. For example, each of the first to nth base station interfaces 211-1 to 211-n may increase the power of the extracted uplink signal and output the increased power of the uplink signal to a corresponding base station. .

The headend combiner/divider 212 may combine downlink signals output from the first to nth base station interfaces 211-1 to 211-n. Hereinafter, the combined downlink signals are referred to as downlink transmission signals. The headend combiner/distributor 212 may distribute the downlink transmission signal to the first to mth headend optical transceivers 213-1 to 213-m.

The headend combiner/distributor 212 may combine the uplink transmission signals output from the first to mth headend optical transceivers 213-1 to 213-m. The headend combiner/divider 212 may distribute the combined uplink transmission signals to the first to nth base station interfaces 211-1 to 211-n.

Depending on the implementation, the headend combiner/distributor 212 may, for example, transmit an extended control signal, a remote control signal, a status information request signal, a delay measurement signal, etc., transmitted from the headend controller 214 with the downlink signals. Combined together to generate the downlink transmission signal. Here, the extended control signal may be a signal for controlling the extended devices 230a and 230b, and the remote control signal may be a signal for controlling the remote devices 220a to 220d. The status information request signal may be a signal for requesting information on downlink power, uplink power, or whether an abnormality has occurred from the expansion devices 230a and 230b or the remote devices 220a to 220d. The delay measurement signal may be a signal for measuring a delay between the headend device 210 and the expansion devices 230a and 230b or between the headend device 210 and the remote devices 220a to 220d.

Alternatively, the headend combiner/distributor 212 may separate a state information signal, a delay response signal, etc. transmitted from the expansion devices 230a and 230b or remote devices 220a to 220d from the uplink transmission signals, The separated state information signal, delay response signal, and the like may be transmitted to the headend controller 214. Here, the state information signal and the delay response signal may be signals transmitted by the extension devices 230a and 230b or the remote devices 220a to 220d in response to a state information request signal and a delay measurement signal, respectively.

The headend combiner/distributor 212 may include, for example, a signal conversion device such as a modem, and through the signal conversion device, the above-described predetermined control signal is combined with the downlink signals to expand the device. (230a, 230b) and / or can be processed to be transmitted to the remote device (220a ~ 220d), the status information signal from the expansion device (230a, 230b) and / or remote device (220a ~ 220d), etc. Can be processed to be used by (214).

Each of the first to mth headend optical transceivers 213-1 to 213-m may generate a downlink optical signal by electro-optically converting the input downlink transmission signal. Each of the first to mth headend optical transceivers 213-1 to 213-m transmits the generated downlink optical signal to the expansion devices 230a and 230b or the remote devices 220a to 220d through a corresponding optical transmission medium. Can be transmitted.

Each of the first to mth headend optical transceivers 213-1 to 213-m may receive an uplink optical signal from the expansion devices 230a and 230b or the remote devices 220a to 220d through a corresponding optical transmission medium. I can. Each of the first to mth headend optical transceivers 213-1 to 213-m may photoelectrically convert an input uplink optical signal to restore an uplink transmission signal. Each of the first to mth headend optical transceivers 213-1 to 213-m may output the restored uplink transmission signal to the headend combiner/distributor 212.

Depending on the embodiment, at least one of the first to mth headend optical transceivers 213-1 to 213-m may include, for example, the extended control signal transmitted from the headend controller 214, the remote control signal, The downlink optical signal may be generated by electro-optical conversion of the state information request signal, the delay measurement signal, and the like together with the input downlink transmission signal.

Alternatively, at least one of the first to m-th headend optical transceivers 213-1 to 213-m photoelectrically converts the input uplink optical signal, and then the expansion devices 230a and 230b or the remote devices 220a to 220d The state information signal, the delay response signal, etc. transmitted from) may be separated from the uplink transmission signal, and the separated state information signal, the delay response signal, and the like may be transmitted to the headend controller 214.

At least one of the first to mth headend optical transceivers 213-1 to 213-m may include, for example, a signal conversion device such as a modem, and the predetermined control described above using the signal conversion device Signals, etc. can be processed to be electro-optical converted together with the downlink transmission signal and transmitted to the expansion devices 230a and 230b and/or remote devices 220a to 220d, and the expansion devices 230a and 230b and/or remote devices The state information signals from 220a to 220d can be processed to be used by the headend controller 214.

The headend controller 214 controls at least one of the first to nth base station interfaces 211-1 to 211-n and the first to mth headend optical transceivers 213-1 to 213-m and/or Can be monitored.

The headend controller 214 may receive a headend control signal from an external device, for example, an NMS 300 communicatively connected through a network, an administrator's terminal, and the like, and receive a first control signal in response to the headend control signal. To the n-th base station interfaces 211-1 to 211-n and the first to m-th headend optical transceivers 213-1 to 213-m may be controlled and/or monitored. Here, as a link between the headend controller 214 and an external device, for example, an Ethernet link may be used, but the technical idea of the present invention is not limited thereto, and any type of link may be used.

The headend controller 214 includes state information on at least one of the first to nth base station interfaces 211-1 to 211-n and the first to mth headend optical transceivers 213-1 to 213-m A signal may be generated, and the generated state information signal may be transmitted to the external device.

The headend controller 214 combines predetermined signals generated by itself or transmitted from the external device, for example, the above-described extended control signal, remote control signal, status information request signal, delay measurement signal, etc. It is possible to transmit the predetermined signals to the splitter 212 or the first to mth headend optical transceivers 213-1 to 213-m so that the predetermined signals are transmitted to the expansion device 230a and/or the remote device 220a. .

The headend controller 214 includes extension devices 230a, 230b and/or remote devices 220a from the headend combiner/distributor 212 or the first to mth headend optical transceivers 213-1 to 213-m. ~220d) state information signal, delay response signal, etc. may be received. The headend controller 214 may analyze a state of a corresponding device and measure a delay based on the transmitted signals. Meanwhile, the headend controller 214 may transmit a status information signal transmitted from the expansion devices 230a and 230b and/or the remote devices 220a to 220d to the external device through the aforementioned Ethernet link.

The headend controller 214 may include, for example, a signal conversion device such as a modem, and can process the above-described control signal through the signal conversion device so that a corresponding configuration can be used or can be used by itself. have.

The headend controller 214 includes first to nth base station interfaces 211-1 to 211-n, a headend combiner/distributor 212, and first to mth headend optical transceivers 213-1 to 213-m. ) For at least one of the input and/or output signals. In this case, the headend controller 214 may have a configuration for spectrum analysis. However, it goes without saying that the configuration for spectrum analysis may be implemented separately from the headend controller 214. The headend controller 214 adjusts the power of the downlink signals based on the result of monitoring the frequency spectrum of the downlink signals input to the first to nth base station interfaces 211-1 to 211-n, Limited transmission resources between the device 210 and the remote devices 220a to 220d may be equally distributed to each of the downlink signals.

3 is a block diagram according to an embodiment of the headend combiner/distributor shown in FIG. 2. FIG. 4 is a diagram illustrating a frame structure used in a communication signal framing process of the headend combiner/distributor shown in FIG. 3.

2 and 3, the headend combiner/distributor 212 may include a signal monitoring device 410, a framer 412, a frame setter 414, and a signal splitter 416. .

The signal monitoring apparatus 410 may receive a plurality of communication signals (eg, downlink signals) transmitted from a base station, and monitor a frequency band of each of the plurality of received communication signals.

According to an embodiment, the headend controller 214 provided outside the headend combiner/distributor 212 may operate as a signal monitoring device by replacing the function of the signal monitoring device 410, and the headend controller 214 ) Can be interpreted as the signal monitoring device 410. In this case, the headend combiner/distributor 212 may not include the signal monitoring device 410.

The framer 412 may frame a plurality of communication signals into one frame by including a plurality of communication signals in a band slot corresponding to a frequency band of each of the plurality of communication signals according to a preset frame structure.

Referring to FIG. 4 together, in a preset frame structure, a frame may include a plurality of band slots BAND A to BANDH, each of which is allocated to a predetermined frequency band.

According to an embodiment, a plurality of band slots BAND A to BANDH may be allocated to different frequency bands.

Depending on the embodiment, a plurality of band slots BAND A to BAND H are assigned a continuous frequency band (e.g., a 600 MHz to 700 MHz band is assigned to the first band slot BAND A, and a second band slot BAND B) may be assigned a 700MHz~800MHz band), or an intermittent frequency band assigned (e.g., 600MHz~700MHz band is assigned to the first band slot (BAND A), and 750MHz to the second band slot (BAND B)) Bands of ~850MHz may be allocated.

Depending on the embodiment, each of the plurality of band slots BAND A to BANDH is a plurality of sub-band slots allocated to each of the detailed frequency bands in the frequency band corresponding to each of the plurality of band slots BAND A to BANDH They may include SUB BAND #1 to SUB BAND #K.

For example, if the frequency allocated to the eighth band slot (BAND H) is 700 MHz to 800 MHz, the plurality of sub-band slots (SUB BAND #1 to SUB BAND #K) belonging to the eighth band slot (BNAD H) is 700 MHz. Detailed frequency bands (eg, 710MHz to 720MHz, 730MHz to 740MHz, etc.) within ~800MHz may be allocated, respectively.

The framer 412 is a band to which each frequency band belongs to a plurality of communication signals (SIGNAL #1 to SIGNAL #N) according to this preset frame structure. It can be framed as one frame by including it in a slot or a sub-band slot.

Depending on the embodiment, the framer 412 may convert each of the plurality of communication signals SIGNAL #1 to SIGNAL #N into a band slot or sub-band to which each frequency band belongs to the plurality of communication signals SIGNAL #1 to SIGNAL #N. -One frame may be generated by being included in the band slot and filling the band slot or sub-band slot with an empty space with a default value.

The framer 412 includes a communication signal that is not primarily included in a frame among a plurality of communication signals (SIGNAL #1 to SIGNAL #N) in a position different from a position according to a preset frame structure. You can framing with frames.

Depending on the embodiment, when the frequency bands of the plurality of communication signals (SIGNAL #1 to SIGNAL #N) are overlapped and there is insufficient space in a specific band slot or a specific sub-band slot, at least some of the communication signals are May not be included in.

According to another embodiment, when the frequency band of at least some of the communication signals among the communication signals SIGNAL #1 to SIGNAL #N is out of the range of the frequency band of the band slots according to the preset frame structure, at least some of the communication signals May not be included in the frame during the framing process.

According to an embodiment, when the framer 412 includes a communication signal at a location different from a location according to a preset frame structure, the framer 412 analyzes a band slot or sub-band slot remaining space after the first framing process The communication signal may be included in the remaining band slot or sub-band slot.

According to an embodiment, when the framer 412 includes a communication signal at a position different from a position according to a preset frame structure, the band slot in the preset frame structure remains the same, but only the sub-band slot is changed to communicate. Signals can be included at different locations within the frame.

According to an embodiment, when the framer 412 includes a communication signal at a position different from a position according to a preset frame structure, the framer 412 changes the band slot itself in the preset frame structure to include the communication signal at another position in the frame. I can make it.

The frame setter 414 may reset a preset frame structure according to a result of monitoring the frequency bands of each of the plurality of communication signals by the signal monitoring device 410.

According to an embodiment, the frame setter 414 determines the frequency at which communication signals are repeatedly received for each frequency band and the amount of data of the received communication signals, based on the frequency bands of each of the plurality of communication signals received during a predetermined time. Can be analyzed.

The frame setter 414 has a relatively large space in the frame structure for a frequency band in which the frequency of reception of communication signals for each frequency band is relatively high or the amount of data of the received communication signal is relatively large according to the analysis result. Band slots of can be allocated. In this case, band slots having different sizes may be allocated for each frequency band.

According to an embodiment, the frame setter 414 is based on the location information where the communication node (e.g., the headend device 210) or the distributed antenna system 200 is installed, the size of each frequency band corresponding to the location information Each of the plurality of band slots BAND A to BAND H and the plurality of sub-band slots SUB BAND #1 to SUB BAND #K may be allocated.

For example, in the case where the headend device 210 or the distributed antenna system 200 is installed in the United States, a plurality of band slots (BAND A to BAND H) and a plurality of A size of each of the sub-band slots SUB BAND #1 to SUB BAND #K may be allocated.

According to an embodiment, the frame setter 414 is based on a frequency at which communication signals are rearranged within a frame (when included in a position different from a position according to a preset frame structure) during the framing process by the framer 412, The preset frame structure may be reset.

According to an embodiment, the frame setter 414 is based on the frequency at which the communication signal is rearranged within the frame (when included in a position different from the position according to the preset frame structure) during the framing process by the framer 412, You can also learn the optimal frame structure.

5 is a flowchart of a method of operating a communication node according to an embodiment of the present invention.

1 to 5, a communication node (eg, 210) included in the distributed antenna system 200 may receive a plurality of communication signals transmitted from the base stations 100-1 to 100-n (S501). ).

A communication node (eg, 210) included in the distributed antenna system 200 may monitor a frequency band of each of the plurality of received communication signals (S502).

The communication node (eg, 210) included in the distributed antenna system 200 includes a plurality of communication signals in each of a plurality of band slots corresponding to a frequency band of each of the plurality of communication signals according to a preset frame structure. It can be framed as one frame (S503).

According to an embodiment, the preset frame structure may include a plurality of band slots (eg, BAND A to BAND H) each allocated to a predetermined frequency band.

According to an embodiment, each of the plurality of band slots (eg, BAND A to BAND H) may include a plurality of sub-band slots (eg, SUB BAND #1 to SUB BAND #K).

The communication node (e.g., 210) included in the distributed antenna system 200 includes a communication signal that is not included in the frame in step S503 at a position different from the position according to a preset frame structure in the frame and framing it into one frame. Can be (S504).

According to an embodiment, when a communication signal that is not included in a frame in step S503 is relocated according to step S504, it may be relocated to another sub-band slot within the same band slot or to a completely different band slot.

Above, although the present invention has been described in detail with reference to a preferred embodiment, the present invention is not limited to the above embodiment, and various modifications and changes by those of ordinary skill in the art within the spirit and scope of the present invention This is possible.

100-1~100-n: base station
200: distributed antenna system
210: head end device
220a~220d: Remote device
230a, 230b: expansion device
300: NMS (Network Management Server)

Claims (10)

In a communication node for transmitting a plurality of communication signals in a distributed antenna system,
A signal monitoring device for receiving the plurality of communication signals transmitted from at least one base station and monitoring a frequency band of each of the plurality of received communication signals; And
According to a preset frame structure, including a framer for framing the plurality of communication signals into one frame by including the plurality of communication signals in a band slot corresponding to each frequency band of the plurality of communication signals,
In the framing process, the framer includes a communication signal not included in the frame among the plurality of communication signals in a position different from a position according to the preset frame structure in the frame and framing the frame into the one frame. ,
The preset frame structure,
A communication node comprising a plurality of band slots each assigned to a predetermined frequency band.
delete The method of claim 1,
Each of the plurality of band slots in the preset frame structure,
A communication node comprising a plurality of sub-band slots, each of which is assigned to each of sub-bands in a frequency band corresponding to each of the plurality of band slots.
The method of claim 3,
The framer,
Including a communication signal not included in the frame among the plurality of communication signals in a sub-band slot different from the sub-band slot in the band slot according to the preset frame structure in the frame, and framing it into one frame Node.
The method of claim 3,
The framer,
A communication node for framing into the one frame by including a communication signal not included in the frame among the plurality of communication signals in a band slot different from a band slot according to the preset frame structure in the frame.
The method of claim 1,
The communication node further comprising a frame setter configured to reset the preset frame structure according to a result of monitoring the frequency bands of each of the plurality of received communication signals.
The method of claim 6,
The frame setter,
According to a result of monitoring the frequency bands of each of the plurality of received communication signals, the communication node determines at least one of a frequency at which reception of a communication signal is repeated for each frequency band and an amount of data of a received communication signal.
The method of claim 7,
The frame setter,
A communication node that allocates a band slot of a relatively large space in a frame structure for a frequency band in which the frequency of reception of a communication signal is repeated or a data amount of a received communication signal is relatively large.
The method of claim 6,
The preset frame structure,
A communication node having a structure in which each of a plurality of band slots is allocated with a size for each frequency band corresponding to the location information based on the location information in which the communication node is installed.
Receiving a plurality of communication signals transmitted from at least one base station, and monitoring a frequency band of each of the plurality of received communication signals; And
Framing into one frame by including the plurality of communication signals in a band slot corresponding to each frequency band of the plurality of communication signals according to a preset frame structure including a plurality of band slots each allocated for each frequency band It includes the step of,
The framing step,
A communication signal not included in the frame among the plurality of communication signals is included in the frame at a position different from the position according to the preset frame structure, and is framed as the one frame,
The preset frame structure,
A method of operating a communication node, including a plurality of band slots each allocated to a predetermined frequency band.

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