Multiband distribution device

Abstract

To provide a multiband distribution device capable of providing a plurality of FDD bands and TDD and TDD MIMO services.SOLUTION: A multiband distribution device includes: a master unit 5100 that accommodates a plurality of bands including FDD and TDD services, filters and adjusts a service signal for each band to a specified gain for each band, transmits the signal to a plurality of slave units through a coaxial line, adjusts and filters a terminal signal for each band transmitted from a plurality of slave units in an opposite direction to the specified gain for each band, and transmits the signal to a BTS through an antenna; and a slave unit 6100 configured to filter the band-specific signal, adjust the band-specific signal to the specified gain, output the service signal toward the terminal through the antenna, and adjust the terminal signal to the specified gain, filter the band-specific signal, and transmit the filtered signal to the master unit.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a multiple band distribution device, and more particularly to a multiple band distribution device that wirelessly interfaces with a BTS (Base Transceiver Station) to enable mobile communication services of various bands including 5G. [Background technology]

[0002] The multi-band distribution device is a device that amplifies signals from a BTS (Base Transceiver Station) and transmits them to terminals in wireless environments where radio wave propagation is difficult, such as high-rise and large buildings, campuses, stadiums, hospitals, and tunnels, so that the signals can reach shadow areas. It also amplifies signals transmitted from terminals in wireless shadow areas in the opposite direction to the terminal and transmits them to the BTS.

[0003] A typical multi-band distribution device is configured with a master unit that wirelessly interfaces with a band-specific BTS (Base Transceiver Station), adjusts the input service signal to a level specified for each band, and transmits it to a slave unit via a coaxial cable together with DC power via a bias-tee, and a slave unit that uses the DC power transmitted from the master unit via the coaxial cable as a power source for the slave unit via a bias-tee, adjusts the band-specific service signal to a level specified for each band, and outputs it via an antenna.

[0004] A number of slave units connected to a master unit are located on different floors of a building or in different shaded areas to eliminate shading and maintain smooth service.

[0005] In addition, the front slave unit transmits DC power and band-specific service signals to the rear slave unit via a coaxial cable, and the rear slave unit receives the power and band-specific service signals via a bias tee and outputs the service signals to the antenna at a gain and level specified for each band.

[0006] In addition, a coaxial line is used to connect the master unit and the slave unit, and in order to compensate for the loss due to the length of the coaxial line, a TG (Tone Generator) is used to check the tone level received from the slave unit, calculate the loss, and perform compensation.

[0007] However, since the losses due to the length of the coaxial line are not the same for each frequency band in a multi-band service, there is a problem that the line losses cannot be properly compensated for for each frequency band in a multi-band service.

[0008] In order for a multi-band distribution device to serve a TDD (Time Division Duplex) service band such as 5G in a multi-band configuration, a TDD synchronization module (TSM, TDD Sync Module) must be installed to obtain RF gating information based on TDD synchronization of the band.

[0009] In existing distribution devices, for 5G TDD services, a TDD synchronization module must be installed not only in the master unit but also in each slave unit.

[0010] However, if a TDD synchronization module is provided for each slave unit, the power consumption of each slave unit increases, and the burden of heat generation and electricity costs also increases.

[0011] The increase in power consumption of each slave unit due to the provision of a TDD synchronization module for each slave unit causes problems, particularly in the case of a configuration in which power is remotely supplied from a master unit to multiple slave units, such as an increase in the cost of a master unit power supply that supplies power from the master unit to multiple slave units, and an increase in the burden of heat generation and costs due to the addition of a TDD synchronization module for each slave unit. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] Korean Patent Registration No. 10-1236408 [Patent Document 2] Korean Patent Registration No. 10-0296111 Summary of the Invention [Problem to be solved by the invention]

[0013] The present invention has been proposed to solve the above-mentioned problems, and aims to provide a multi-band distribution device that can solve not only the shadowing problem between an FDD (Frequency Division Duplex) BTS and a terminal, but also the shadowing problem of a TDD service between a TDD BTS and a terminal.

[0014] Another object of the present invention is to provide a multi-band distribution device that can reduce operational costs by reducing initial investment costs and electricity charges, since TDD service can be provided for each slave unit without installing an expensive synchronization signal detector (TSM) for each remotely located slave unit for TDD service.

[0015] Another object of the present invention is to provide a multi-band distribution device that can provide stable TDD services without being affected by the state and quality of the TBS service signal input from the master unit or the preceding slave unit because a synchronization signal detector (TSM) is not provided for each slave unit.

[0016] Another object of the present invention is to provide a multi-band distribution device that can provide stable services by easily compensating for line losses in DL and UL paths between devices for each band and easily setting gain and output specified for each device and band.

[0017] It is yet another object of the present invention to provide a multiple band distribution device capable of MIMO service of TDD. [Means for solving the problem]

[0018] To achieve the above object, the multi-band distribution device according to the present invention accommodates a plurality of bands including FDD (Frequency Division Duplex) and TDD (Time Division Duplex) services, and includes a master unit that filters service signals for each band, adjusts the signals to a designated gain, and transmits the service signals to a plurality of slave units via a coaxial line, and adjusts terminal signals for each band transmitted from the plurality of slave units to a designated gain for each band, filters the signals, and transmits the signals to a BTS (Base Transceiver Station) via an antenna; and a slave unit that is connected to the master unit via a coaxial line, filters the signals for each band, adjusts the signals to a designated gain, and outputs the service signals to the terminals via the antenna, and adjusts the terminal signals to a designated gain and filters the signals before transmitting them to the master unit.

[0019] The master unit comprises a DMXM (Donor Multiplexer for Master Unit) connected to an antenna on the FDD BTS and / or TDD BTS side and responsible for dividing and filtering signals by band; a MBT (Master Unit Bias-T) connected to an antenna on the terminal side and responsible for transmitting service signals to slave units and combining DC power supplied from an MPSU (Master Unit Power Supply Unit) and transmitting it to a coaxial line; a distributor located between the SMXM (Service Multiplexer for Master Unit) and multiple MBTs (Master Unit Bias-T) and responsible for dividing signals to multiple slave units and combining signals input from multiple slave units; and a SMXM (Service Multiplexer for Master Unit) connected to the distributor and responsible for filtering and dividing signals by band. a DBPM (Donor BPF for Master Unit) connected to the antenna on the TDD BTS side and performing filtering; a MIMO distributor connected to the SBPM (Service BPF for Master Unit) and performing filtering; a SBPM (Service BPF for Master Unit) connected to the MIMO distributor and performing filtering; a TDD Sync Module (TSM) receiving a TDD service signal transmitted from the TDD BTS, determining a time point for switching between TDD DL and UL through logical operations, outputting a TDD switching signal and transmitting it to the RF switches of the TBU and MMBU; a MMOD (Master Unit MODEM) communicating with a number of slave units; an MPSU (MU Power Supply Unit) connecting to the MBT and performing power supply to the master unit and supplying DC power to a number of slave units; and a band-specific allocation BU (FDD Bandwidth Buffer Unit) connected to the DMXM and amplifying and adjusting the gain of the FDD signal for each band. a TBU (TDD Band Unit), connected to the DMXM, amplifying and gain-adjusting the TDD signal for each band, and time-separating DL and UL via an RF switch using a TDD switching signal transmitted from the TSM; a MIMO TDD Band Unit (MMBU), connected to the DBPM, amplifying and gain-adjusting the TDD MIMO signal for each band, and time-separating DL and UL via an RF switch using a TDD switching signal transmitted from the TSM; a Tone Generator (TG), connected to the BU, TBU, and MMBU, and supplying a band-specific tone to the BU, TBU, and MMBU; a Sync Tx (ST), connected to the TSM, receiving a TDD switching signal, outputting a synchronous gating CW signal, and supplying it to a slave unit via the SMXM; and a Multi-Channel Subsystem (MMOD), which manages communication between the MMOD and all slave units, and which is connected to the TSM, TG, MPSU (Multi-Channel Subsystem), and the MMOD.The MCU (Master Control Unit) controls and monitors the ST, BU, TBU, and MMBU for each band.

[0020] The ST includes an STSW (ST RF switch) that receives a synchronous switching signal from the TSM and switches on and off a CW signal output from a CG (CW Generator), and a CG that outputs a CW signal.

[0021] The master unit is composed of TGSWs (TG RF switches) connected to the TG and located in the BUs, TBUs, and MMBUs for each band, which pass band-specific tone signals transmitted from the TG and block band-specific service signals; MIDETs (master unit input detectors) located on the input side of the BUs, TBUs, and MMBUs for each band, which output band-specific input level information as a voltage and transmit it to the MCU; and MODETs (master unit output detectors) located on the output side of the BUs, TBUs, and MMBUs for each band, which output band-specific output level information as a voltage and transmit it to the MCU. and an MCU that controls the ON / OFF of the tones for each band of the TG, controls the on / off of the TGSW for each band, checks the output level information of the MODET for each band, adjusts the gain in the BU, TBU and MMBU for each band, and controls and monitors so that the tone output designated for each band is transmitted to the slave unit. It calculates a line loss value for each band between the master unit and the slave unit using the tone output level value of the slave unit transmitted via the SMOD and SCU of the slave unit, communicates with the SMOD via the MMOD, controls the DL gain for each band of the slave unit on the DL path via the SCU to output at a designated level and perform loss compensation for each band of DL, and controls the UL gain of the master unit on the UL path reflecting the calculated line loss value and performs loss compensation for each band of UL.

[0022] The slave unit includes a DSBT (Donor Slave Unit Bias-T) that separates the DC power input from the master unit through a coaxial line from the service signal of the master unit, transmits the DC power to an SP (Slave Unit Power) and transmits the service signal to a DMXS (Donor Multiplexer for Slave Unit), an SP (Slave Unit Power) that is connected to the DSBT, receives DC power, supplies power to the slave unit, and transmits the DC power to an SSBT (Service Slave Unit Bias-T), a DMXS (Donor Multiplexer for Slave Unit) that is connected to the DSBT and performs classification and filtering for each band, an SMOD (Slave Unit MODEM) that communicates with the MMOD of the master unit, an SR (Slave Unit Rx) that receives a synchronous discontinuous CW signal from the ST of the master unit and outputs a TDD switching control signal, and a band-specific allocation BM (FDD Band Multiplexer) that is connected to the DMXS and SMXS and amplifies and adjusts the gain for each FDD band. a TDD Band Module (TBM) connected to the DMXS and SMXS, amplifying and gain-adjusting the TDD band, and using a TDD switching signal transmitted from the SR to temporally separate DL and UL via an RF switch; a Service Multiplexer for Slave Unit (SMXS) connected to the BM and TBM, performing band separation and filtering; and a Combiner PL (CPL) connected to the SMXS, transmitting a service signal to a Service Slave Unit (SSBT) for transmitting the service signal to another slave unit and to a slave unit antenna for wireless transmission to a terminal. The master unit includes an SSBT (Service Slave Unit Bias-T) connected to the SP, combining the DC power transmitted from the SP with the service signal transmitted from the CPL, and transmitting the combined signal to another slave unit via a coaxial line; a DBPS (Donor BPF for Slave Unit) for filtering the MIMO signal received from the master unit; a MMBM (MIMO TDD Band Module) connected to the DBPS, amplifying and gain-adjusting the MIMO signal, and using a TDD switching signal transmitted from the SR to temporally separate DL and UL via an RF switch; a SBPS (Service BPF for Slave Unit) connected to the MMBM and performing filtering; a MCPL (MIMO Combiner) connected to the SBPS, transmitting the service signal to an antenna and transmitting it to another slave unit via a coaxial line; and a SCU (Slave Unit Control Unit) for managing the SMOD to communicate with the master unit and controlling and monitoring the SP, SR, BM, TBM, and MMBM.

[0023] The SR includes an SRCPL (SR Coupler) that transmits the synchronous discontinuous CW signal, which is transmitted from the ST of the master unit via a coaxial line and input via the DMXS, to the SMXS, transmits it to other slave units via a coaxial line, and transmits it to a PD (Power Detector) via a coupling port; a PD (Power Detector) that detects the power level of the synchronous discontinuous CW signal input from the SRCPL and outputs it as a voltage; a DIS (Discriminator) that compares the input voltage transmitted from the PD with a specified reference voltage and restores and outputs a TDD switching signal; and a BINV (Buffer / Inverter) that buffers and inverts the TDD switching signal input from the DIS and transmits the buffered TDD switching control signal and the inverted TDD switching control signal to the RF switches of the TBM and MMBM. [Effects of the Invention]

[0024] According to the present invention, the following effects can be obtained.

[0025] Firstly, it can not only solve the shadowing problem between the FDD BTS and the terminal, but also the shadowing problem of the TDD service between the TDD BTS and the terminal.

[0026] Second, since TDD service can be provided for each slave unit without installing an expensive synchronization signal detector (TSM) for each remotely located slave unit, it is possible to reduce initial investment costs and electricity costs, thereby reducing operating costs.

[0027] Third, when a synchronization signal detector (TSM) is provided for each slave unit for TDD service, there is a risk that the TDD service may not be possible due to the TSM in the slave unit not operating smoothly depending on the reception status or quality of the TBS service signal transmitted from the master unit or the preceding slave unit to the succeeding slave unit. However, the distribution device of the present invention proposed here does not provide a synchronization signal detector (TSM) for each slave unit, so it is not affected by the status or quality of the TBS service signal input from the master unit or the preceding slave unit, and therefore a stable TDD service is possible.

[0028] Fourth, it is possible to provide stable services because it is easy to compensate for line losses in the DL and UL paths between devices for each band and to set the gain and output specified for each device and band.

[0029] Fifth, MIMO services with TDD are possible. [Brief explanation of the drawings]

[0030] [Figure 1] 1 is a diagram illustrating the configuration of a conventional distribution device that supports multiple bands; [Figure 2]1 is a block diagram of a multi-band distribution device according to an embodiment of the present invention; [Figure 3] FIG. 2 is a configuration diagram for explaining a TDD signal transmission function according to an embodiment of the present invention. [Figure 4] 10 is a block diagram of a multi-band distribution device according to another embodiment of the present invention; [Figure 5] 10 is a block diagram of a line loss compensation function of a multi-band distribution device according to another embodiment of the present invention; [Figure 6] FIG. 10 is a block diagram of a line loss compensation function of a distribution device according to yet another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0031] Figure 1 shows the configuration of a conventional multi-band distribution device, which is a connected configuration of a master unit (MU) 2100, a slave unit 3100, and a subsequent slave unit (SU) 3100-1.While a TG (Tone Generator) 2205 performs loss compensation for the coaxial lines between the master unit and multiple RUs for the specific B1 frequency band, it has the limitation that it is difficult to accurately compensate for loss in the lines for the other frequency bands B2 and B3.

[0032] Furthermore, since the synchronization signal detectors (TSM, TDD Sync Module) 3101 and 3101-1 are provided for each slave unit 3100 and 3100-1, the cost of the device increases, and the power consumption of each slave unit increases, resulting in heat generation and electricity costs.

[0033] FIG. 2 is a block diagram of a multi-band distribution device according to an embodiment of the present invention, showing a multi-band distribution device including FDD, TDD bands and TDD MIMO (Multiple-Input Multiple-Output) services.

[0034] The multi-band distribution device according to an embodiment of the present invention includes a master unit 5100 that accommodates multiple bands including FDD and TDD services, filters band-specific service signals for each band, adjusts the band-specific service signals to a designated gain, and transmits the signals to a multiple slave unit via a coaxial line, and adjusts band-specific terminal signals transmitted from the multiple slave units in the opposite direction to a designated gain for each band, filters the signals, and transmits the signals to a BTS (Base Transceiver Station) via an antenna, and slave units 6100, 6100-1 that are connected to the master unit via a coaxial line, filter band-specific signals, adjust the band-specific signals to a designated gain, output the service signals to the terminal via the antenna, and adjust the terminal signals to a designated gain, filter the signals, and transmit them to the master unit.

[0035] The master unit 5100 includes a DMXM (Donor Multiplexer for Master Unit) 5106 connected to an antenna 51 on the FDD BTS 110 and TDD BTS 120 side and performing band separation and filtering, an MBT (Master Unit Bias-T) 5108 connected to an antenna on the terminal side and performing functions of transmitting service signals to slave units and combining DC power supplied from an MPSU (MU Power Supply Unit) and transmitting it to a coaxial line, a distributor 5109 located between an SMXM (Service Multiplexer for Master Unit) and multiple MBTs and performing functions of distributing signals to multiple slave units and combining signals input from multiple slave units, and an SMXM (Service Multiplexer for Master Unit) 5107 connected to the distributor and performing functions of filtering and separating signals by band.

[0036] The master unit 5100 further includes a DBPM (Donor BPF for MU) 5531 connected to an antenna on the TDD BTS side and performing filtering, a MIMO distributor 5533 connected to the SBPM and performing filtering to distribute MIMO signals to multiple slave units and combine signals input from multiple slave units, an SBPM (Service BPF for MU) 5532 connected to the MIMO distributor and performing filtering, and a TSM (TDD Sync Module) 5101 that receives a TDD service signal transmitted from the TDD BTS, determines the TDD DL / UL switching point through logical operations, outputs a TDD switching signal, and transmits it to the RF switches of the TBU and MMBU.

[0037] The master unit 5100 further includes: an MMOD (master unit MODEM) that communicates with a plurality of slave units; an MPSU (master unit Power Supply Unit) 5105 that supplies power to the master unit and is connected to the MBT (master unit Bias-T) to supply DC power to a plurality of slave units; band-specific allocation BUs (FDD Band Units) 5200 and 5300 that are connected to the DMXM and amplify and gain-adjust FDD signals for each band; a TBU (TDD Band Unit) 5400 that is connected to the DMXM and amplifies and gain-adjusts TDD signals for each band and uses a TDD switching signal transmitted from the TSM to temporally separate DL and UL via an RF switch; and a MMBU (MIMO TDD Band Unit) 5500 that is connected to the DBPM and amplifies and gain-adjusts TDD MIMO signals for each band and uses a TDD switching signal transmitted from the TSM to temporally separate DL and UL via an RF switch.

[0038] The master unit also includes a TG (Tone Generator) 5120 connected to the BU, TBU, and MMBU and supplying band-specific tones to the band-specific BU, TBU, and MMBU, an ST (Sync Tx) 5130 connected to the TSM and receiving a TDD switching signal to output a synchronous discontinuous CW signal and supply it to the slave unit via the SMXM, and an MCU (Master Unit Control Unit) 5103 that manages the MMOD to communicate with all slave units and controls and monitors the TSM, TG, MPSU, ST, band-specific BU, TBU, and MMBU.

[0039] The ST5130 may include an STSW (ST RF Switch) that receives a synchronous switching signal transmitted from the TSM and switches on and off the CW signal output from a CG (CW Generator), and a CG that outputs the CW signal.

[0040] The master unit 5100 further includes TGSWs (TG RF switches) 5204, 5304, 5404, 5504 connected to the TG and located in the BUs, TBUs, and MMBUs for each band, which pass band-specific tone signals transmitted from the TG and block band-specific service signals; MIDETs (master unit input detectors) 5203, 5303, 5403, 5503 located at the input side of the BUs, TBUs, and MMBUs for each band, which output band-specific input level information as a voltage and transmit it to the MCU; and MODETs (master unit output detectors) 5203, 5303, 5403, 5503 located at the output side of the BUs, TBUs, and MMBUs for each band, which output band-specific output level information as a voltage and transmit it to the MCU. and an MCU 5103 that controls ON / OFF of the tones for each band of the TG, controls the on / off of the TGSW for each band, checks output level information of the MODET for each band, adjusts gains in BU, TBU and MMBU for each band, and controls and monitors that designated tone outputs for each band are transmitted to the slave units. The MCU 5103 calculates a line loss value for each band between the master unit and the slave units using the tone output level values ​​of the slave units transmitted via the SMOD and SCU of the slave units, communicates with the SMOD via the MMOD, controls DL gains for each band of the slave units in the DL path via the SCU to output at a designated level, thereby performing loss compensation for each DL band, and controls the UL gain of the master unit in accordance with the calculated line loss value in the UL path, thereby performing loss compensation for each UL band.

[0041] The slave units 6100, 6100-1 include a DSBT (Donor Slave Unit Bias-T) 6108 that separates the DC power input from the master unit via a coaxial line from the service signal of the master unit, and transmits the DC power to the SP and the service signal to the DMXS; an SP (Slave Unit Power) 6120, 6120-1 that is connected to the DSBT and receives DC power to supply power to the slave unit and transmits the DC power to an SSBT (Service Slave Unit Bias-T); a DMXS (Donor Multiplexer for SU) 6106, 6106-1 that is connected to the DSBT and performs band-by-band classification and filtering; and an SMOD (Slave Unit MODEM) that communicates with the MMOD of the master unit.

[0042] The slave units 6100 and 6100-1 include an SR (slave unit Rx) 6130 that receives a synchronous discontinuous CW signal from the ST of the master unit and outputs a TDD switching control signal, band-specific allocation BMs (FDD Band Modules) 6200 and 6300 that are connected to the DMXS and SMXS and that amplify and control the gain for each FDD band, a TDD Band Module (TBM) 6400 that is connected to the DMXS and SMXS and that amplifies and controls the gain for the TDD band and that uses the TDD switching signal transmitted from the SR to temporally separate DL and UL via an RF switch, and a Service Multiplexer for SMXS (Service Multiplexer for SMXS) that is connected to the BM and TBM and that performs band separation and filtering. a CPL (Combiner) 6115 connected to the SMXS and transmitting a service signal to the SSBT and the slave unit antenna for wireless transmission to the terminal in order to transmit the service signal to another slave unit; an SSBT 6118 connected to the SP and combining the DC power transmitted from the SP with the service signal transmitted from the CPL and transmitting the combined signal to another slave unit via a coaxial line; a DBPS (Donor BPF for Slave Unit) 6531 filtering the MIMO signal transmitted from the master unit; a MMBM (MIMO TDD Band Module) 6500 connected to the DBPS and amplifying and gain-adjusting the MIMO signal, and using a TDD switching signal transmitted from the SR to temporally separate DL and UL via an RF switch; and a SBPS (Service BPF) connected to the MMBM and filtering the MIMO signal. The SMOD comprises a SBPS (Slave Unit) 6532, an MCPL (MIMO Combiner) 6533 connected to the SBPS and transmitting a service signal to an antenna and then to other slave units via a coaxial line, and an SCU (Slave Unit Control Unit) 6103, 6103-1 that manages the SMOD to communicate with the master unit and controls and monitors the SP, SR, BM, TBM and MMBM.

[0043] 3, the SR 6130 may include: SRCPL (SR Coupler) 611, 611-1 that transmits a synchronous discontinuous CW signal, which is transmitted from the ST of the master unit via a coaxial line and input via the DMXS, to the SMXS, transmits the signal to another slave unit via a coaxial line, and transmits the signal to a PD (Power Detector) via a coupled port; PD (Power Detector) 612, 612-1 that detects a power level of the synchronous discontinuous CW signal input from the SRCPL and outputs the detected signal as a voltage; DIS (Discriminator) 613, 613-1 that compares the input voltage transmitted from the PD with a specified reference voltage and restores and outputs a TDD switching signal; and BINV (Buffer / Inverter) 614, 614-1 that buffers and inverts the TDD switching signal input from the DIS and transmits the buffered TDD switching control signal and the inverted TDD switching control signal to RF switches of the TBM and MMBM.

[0044] Since the TSM is formed of FPGA, i.e., expensive logic circuits, and distributing it in each unit would be a cost burden, as described above, the ST of the master unit MU only transmits the synchronization signal, and the SR6130 in each slave unit SU only receives it, thereby controlling the switch of the TDD module in each slave unit SU. The ST and SR are not composed of expensive logic circuits like FPGA, but are composed of inexpensive buffers, inverter devices and window comparators, which is advantageous in terms of cost.

[0045] In the multi-band distribution device according to the present invention configured as described above, the master unit (MU) 5100 is wirelessly connected to the BTSs (FDD BTS) 110, 120 for each band and the TBS (TDD BTS) 130. In the case of FDD service, the wireless service signals transmitted from the BTSs 110, 120 for each band are received via the antenna 51 in the DL (Downlink) path, and separated into bands via the DMXM 5106. The B1 MBU 5200, B2 MBU 5300, and B3 MBU 5400 are then distributed to the B1 MBU 5400. The signal is transmitted to the MBU 5300, amplified through the band-specific amplifiers 5201, 5212, 5301, 5312, and adjusted to the gain and output specified for each band through the band-specific ATTs 5206, 5306. The signal is then combined into a single port through the SMXM 5107, and transmitted to the slave units (SU) 6100, 6100-1, 6100-2, 6100-3 via the coaxial lines 52, 52-1 through the MBT (master unit Bias-T) 5108, 5108-1. In the UL (Uplink) path, the slave units 6100, 6100-1, 6100-2, 6100-3 transmit the signal to the coaxial lines 52, 52-1 and the MBT. The terminal signals received through 5108 and 5108-1 are combined into a single port through a distributor 5109, then separated into bands through an SMXM 5107, and then amplified and gain-adjusted through band-specific amplifiers 5209, 5211, 5309, and 5311 and ATTs 5210 and 5310, and then combined into a single port through a DMXM 5106 and transmitted to the BTSs 110 and 120 through an antenna 51.

[0046] In the case of TDD service, in the DL path, the radio service signal transmitted from the TBS130 is received via the antenna 51, transmitted to the TMBU5400 via the DMXM5106, amplified via the amplifiers 5401 and 5412, adjusted to a specified gain via the ATT5406, combined with other bands via the SMXM5107, separated into multiple lines by the distributor 5109, combined with DC power from the MP slave unit (MPSU) 5105 via the MBT (master unit Bias-T) 5108, and transmitted to the slave unit 6100 via the coaxial lines 52 and 52-1. , 6100-1, 6100-2, 6100-3, and in the UL path, terminal signals received from the slave units 6100, 6100-1, 6100-2, 6100-3 via the coaxial lines 52, 52-1 and MBTs 5108, 5108-1 are combined into a single port by a distributor 5109, the TDD band is separated via an SMXM 5107, the amplified and gain adjusted via amplifiers 5409, 5411 and an ATT 5410 of the TMBU 5400, the band is filtered via a DMXM 5106, and then transmitted to the TBS 130 via an antenna 51.

[0047] In the case of a TDD MIMO service, in the DL path, the TDD MIMO wireless service signal transmitted from the TBS 130 is received via the antenna 551, filtered by the DBPM 5531, and transmitted to the MMBU 5500. The signal is amplified via the amplifiers 5501 and 5512, adjusted to a specified gain via the ATT 5506, filtered via the SBPM 5532, and then separated into multiple lines by the MIMO distributor 5533 and transmitted to the slave unit 6100 via the coaxial lines 53 and 53-1. In the UL path, the terminal signal received from the slave unit 6100 via the coaxial lines 53 and 53-1 is combined into a single port via the MIMO distributor 5533, filtered via the SBPM 5532, and then amplified and gain-adjusted via the amplifier 5511 and the ATT 5510 of the MMBU 5500, and then band-filtered via the DBPM 5531, and then transmitted to the TBS 130 via the antenna 551.

[0048] The TSM (TDD Sync Module) 5101 is the master unit and is connected to the TMBU 5400, analyzes the TDD service signal transmitted from the TMBU 5400, outputs a TDD switching signal, and controls RF switches 5421, 5422, 5521, and 5522 to temporally separate the DL path and the UL path.

[0049] The MBU5200, 5300, TMBU5400, and MMBU5500 can be converted to an intermediate frequency (IF) band using a high frequency selectivity filter (such as a SAW filter or a digital filter).

[0050] The ST (Sync Tx) 5130 is connected to the TSM 5101 in the master unit, and transmits an RF switching signal transmitted from the TSM 5101 to the slave units 6100, 6100-1, 6100-2, and 6100-4.

[0051] To compensate for losses due to the lengths of the lines 52, 53, 52-1, and 53-1 between the master unit 5100 and the slave units 6100 and 6100-2 and the lines 62 and 63 between the slave unit 6100 and the slave unit 6100-1, a band-specific tone is generated through the TG 5120 in the master unit 5100, and band-specific TGSWs (TG RF switches) 5204, 5304, 5404, and 550 are provided. When the tone of the TG 5120 is transmitted through 4, it is adjusted to a specified output level through the band-specific ATTs 5204, 5304, 5404, and 5504, and then transmitted to the coaxial lines 52 and 52-1 through the SMXM 5107, distributor 5109, and MBT (bias tee) 5108, and in the case of MIMO, it is transmitted to the coaxial lines 53 and 53-1 through the SBPM 5532 and distributor 5535 and then transmitted to the slave units 6100 and 6100-2.

[0052] The DC power transmitted from the master unit 5100 is transmitted to the SP 6120 via the DSBT 6108 of the slave unit 6100 .

[0053] In the DL path, the DC power supply and the service signal are separated through the DSBT 6108, and the band-specific service signals are separated by band through the DMXS 6106. In the case of FDD, the signals are amplified through amplifiers 6201, 6207, 6301, and 6307 in the BM 6200 and 6300, and adjusted to a specified gain through the ATT 6206 and 6306 before being transmitted to the SMXS 6107.

[0054] In the case of TDD, the signal is amplified by amplifiers 6401 and 6407 in the TBM6400 and adjusted to a specified gain through the ATT6406, then transmitted to the SMXS6107, transmitted to the antenna 61 through the CPL (coupler) 6115, combined with the DC power transmitted from the SP6120 through the SSBT6118 connected to the CPL6115, and transmitted to the subsequent slave unit 6100-1 through the coaxial line 62.

[0055] In the case of TDD MIMO, the signal is amplified by amplifiers 6501 and 6507 in the MBM 6500 and adjusted to a specified gain by an ATT 6506, and then transmitted to the SBPS 6532 and to the antenna 64 via a CPL 6533.

[0056] In the UL path, the signal received from the terminal via antenna 61 and the UL signal received from the subsequent slave unit 6100-1 via coaxial line 62 and SSBT 6118 are combined by CPL 6115 and separated by band via SMXS6107. In the case of FDD, the signals are amplified and gain-adjusted via amplifiers 6209, 6211, 6309, 6311 and ATTs 6210, 6310 of BM6200, 6300, and in the case of TDD, the signals are UL-switched by RFSW 6422 in TBM6400, and then amplified and gain-adjusted via amplifiers 6409, 6411 and ATTs 6410, and then UL-switched via RFSW 6421. After switching, the signal is filtered by the DMXS6106 and then transmitted to the master unit via the DSBT6108 and coaxial line 52. In the case of MIMO, the UL signals received from the antenna 64 and slave unit 6100-1 are combined by the CPL6533, filtered by the SBPS6532, and then UL switched by the RFSW6522 in the TBM6400. The signals are then amplified and gain adjusted by the amplifiers 6509, 6511 and the ATT6510, UL switched by the RFSW6521, filtered by the DBPS6531, and then transmitted to the master unit via the coaxial line 53.

[0057] The slave units 6100 and 6100-1 include an SR (Sync Rx) 6130 connected to the DMXS 6106. The SR 6130 restores the TDD switching signal transmitted from the ST 5130 in the MU 5100, outputs a TDD switching control signal, and controls RF switches 6421, 6422, 6521, and 6522 that serve to temporally separate the DL path and UL path of the TBM 3400 and MBM 3500.

[0058] The SR includes an SRCPL (SR Coupler) that transmits the synchronous discontinuous CW signal, which is transmitted from the ST of the master unit via a coaxial line and input via the DMXS, to the SMXS, transmits it to other slave units via a coaxial line, and transmits it to a PD (Power Detector) via a coupled port; a PD that detects the power level of the synchronous discontinuous CW signal input from the SRCPL and outputs it as a voltage; a DIS (Discriminator) that compares the input voltage transmitted from the PD with a specified reference voltage and restores and outputs a TDD switching signal; and a BINV (Buffer / Inverter) that buffers and inverts the TDD switching signal input from the DIS and transmits the buffered TDD switching control signal and the inverted TDD switching control signal to the RF switches of the TBM and MMBM.

[0059] The slave unit 6100-1 connected to the slave unit 6100 transmits the DC power transmitted from the slave unit 6100 to the SP6120-1 via the DSBT6108-1, and separates the band-specific service signals by band via the DMXS6106-1. In the case of FDD, the signals are amplified via the amplifiers 6201-1, 6207-1, 6301-1, and 6307-1 in the BM6200-1 and 6300-1, and adjusted to the specified gain via the ATT6206-1 and 6306-1. In the case of TDD, the signal is amplified by amplifiers 6401 and 6407 in the TBM6400 and adjusted to a specified gain by the ATT6406 before being transmitted to the SMXS6107, and then transmitted to the antenna via the CPL (coupler) 6115-1. The signal is then combined with the DC power signal transmitted from the SP6120 via the SSBT6118 connected to the CPL6115, and transmitted to another downstream slave unit via another coaxial line.

[0060] FIG. 3 shows the function of remotely transmitting a TDD synchronization signal for a TDD service, in which the TSM 5101 in the master unit 5100 detects the TDD synchronization signal and transmits a synchronization switching signal to the ST 5130.

[0061] The ST (Sync Tx) 5130 is composed of a CG (Continuous Wave Generator) 501 and an STSW (ST RF Switch) 502, and receives a synchronous switching signal transmitted from the TSM 5101 to control the on / off of the STSW 502. When it is ON, it outputs the CW signal of the CG 501, and when it is OFF, it cuts off the CW signal. The synchronous intermittent CW signal output from the ST 5130 is transmitted to the slave unit via the SMXM 5107, distributor 5109, MBT 5108 and coaxial line. The slave unit 6100 inputs the synchronous intermittent CW signal to the SR (Sync Rx) 6130 via the DSBT 6108 and DMXS 6106, and transmits the synchronous intermittent CW signal to the subsequent slave unit 6100-1 via the SMXS 6107, distributor 6115 and DSBT 6118 through the main port of the CPL 611 in the SR 6130. The power is detected through a PD (Power Detector) 612 connected to the coupling port of a Coupler 611, a synchronous discontinuity signal is restored through a DIS (Discriminator) 613, and a normal signal and an inverted signal are output through a BINV (Buffer / Inverter) 614, which are transmitted to a TBM 6400-1 and an MBM 6500 to control RF switches 6421, 6422, 6521, and 6522.

[0062] The synchronous intermittent CW signal transmitted from the slave unit 6100 is transmitted to the SR 6130-1 via the DSBT 6108-1 and the DMXS 6106-1, and then transmitted to other subsequent slave units via the SMXS 6107-1, the distributor 6115-1, and the SSBT 6118-1 via the main port of the SRCPL 611-1. The power is detected via the PD 612-1 connected to the combined port of the SRCPL 611-1, the synchronous intermittent signal is restored via the DIS 613-1, and output as a normal signal and an inverted signal via the BINV 614-1. The signals are transmitted to the TBM 6400-1 and the MBM 6500-1 to control the RF switches 6421-1, 6422-1, 6521-1, and 6522-1.

[0063] The DIS 613, 613-1 functions to restore CW discontinuity information by comparing a specified reference level with the power level detected by the PD 612, 612-1, and includes an operational amplifier, a comparator, a window comparator, or a function that performs a similar function.

[0064] 4 shows an embodiment in which yet another configuration of the master unit is applied, and is a configuration diagram divided into WU8100, which is in charge of the wireless interface with the BTS, and DU9100, which is in charge of distributing to multiple slave units 6100, 6100-1. If the distance between the position of antennas 51, 551, which interface with the BTS, and the master unit 5100 is far apart depending on the characteristics of the installation location, a single configuration of the master unit 5100 will result in a deterioration in quality due to the distance, but by connecting the WU8100 and DU9100 with coaxial lines 82, 83, it is possible to provide good service without a deterioration in service quality.

[0065] Figure 5 is a diagram for explaining the line loss compensation function. In line loss compensation between the master unit 12100 and the slave unit 13100, when the band-specific tone of TG12120 is turned ON under the control of the MCU 12103 in the master unit 12100 and the contact of the band-specific RF switch 12204 is switched to TG12120, the output level of the power detector 12208 is monitored and the band-specific master unit DL ATT 12206 is adjusted, so that a predetermined output of 15 dBm, for example, is input to the coaxial lines 71 and 71-1.

[0066] As an example of a band, a 15 dBm tone output from the master unit is subjected to (for example) a 10 dB line loss via a coaxial line, and 5 dBm is input to the slave unit's DMXS 13106. For the input tone, the SCU (slave unit control unit) 13103 reads the slave unit's output level from the output detector 13208, calculates a 10 dB line loss value, and adjusts the slave unit's DL ATT 13206 so that (for example) an output level of 15 dBm is output on the designated DL path of the slave unit, thereby compensating for the DL line loss between the master unit and the slave unit, and in the UL path, the calculated 10 dB loss value is reflected in the adjustment of the master unit's UL ATT 12210, thereby compensating for the UL line loss between the master unit and the slave unit.

[0067] In compensating for line loss between slave unit 13100 and slave unit 13100-1, the 15 dBm tone output of slave unit 13100 is subjected to (for example) 20 dB line loss, and −5 dBm is input to the DMXS of slave unit 13100-1. The input tone causes the SCU of slave unit 13100-1 to read the output level of slave unit 13100-1 via the output detector, calculate a line loss value of 20 dB, and adjust the DL ATT of slave unit 13100-1 so that an output level of (for example) 15 dBm is output on the specified DL path of slave unit 13100-1, thereby compensating for the DL line loss between slave unit 13100 and slave unit 13100-1; on the UL path, the calculated 20 dB loss value is reflected in the adjustment of the UL ATT of slave unit 13100, thereby compensating for the UL line loss between slave unit 13100 and slave unit 13100-1.

[0068] Fig. 6 is a diagram showing line loss compensation in a configuration in which the WU8100, DU9100, and slave unit 6100 in Fig. 5 are connected together. The loss compensation method is the same as in Fig. 5.

Claims

1. a master unit that accommodates multiple bands including FDD (Frequency Division Duplex) and TDD (Time Division Duplex) services, filters service signals for each band, adjusts the signals to a designated gain, and transmits the signals to multiple slave units via a coaxial line, and filters terminal signals for each band transmitted from the multiple slave units in the opposite direction, adjusts the signals to a designated gain, and transmits the signals to a BTS (Base Transceiver Station) via an antenna; a slave unit connected to the master unit via a coaxial line, filtering signals for each band and adjusting them to a designated gain, outputting service signals to a terminal via an antenna, and filtering and adjusting terminal signals to a designated gain before transmitting them to the master unit.

2. The master unit A DMXM (Donor Multiplexer for Master Unit) is connected to an antenna of the FDD BTS and / or TDD BTS and serves to classify and filter signals by band; MBT (Master Unit Bias-T), which is connected to the antenna of the terminal device and transmits a service signal to the slave unit, combines DC power supplied from the MPSU (Master Unit Power Supply Unit), and transmits it to the coaxial line; a distributor located between an SMXM (Service Multiplexer for Master Unit) and a plurality of MBTs (Master Unit Bias-Ts) for distributing signals to a plurality of slave units and combining signals input from a plurality of slave units; a Service Multiplexer for Master Unit (SMXM) connected to the distributor and configured to filter and separate signals for each band; DBPM (Donor BPF for Master Unit) is connected to the antenna of the TDD BTS and performs filtering. a MIMO distributor connected to the SBPM (Service BPF for Master Unit) for distributing MIMO signals to a plurality of slave units and combining signals input from the plurality of slave units; a Service BPF for Master Unit (SBPM) connected to the MIMO distributor and performing filtering; a TDD Sync Module (TSM) that receives a TDD service signal transmitted from the TDD BTS, determines a time point for switching between TDD DL and UL through a logical operation, and outputs a TDD switching signal to transmit to the RF switches of the TBU and MMBU; A master unit (MODEM) that communicates with multiple slave units; an MPSU (MU Power Supply Unit) that serves to supply power to the master unit and to supply DC power to a plurality of slave units connected to the MBT; a band allocation unit (BU) connected to the DMXM and amplifying and adjusting the gain of the FDD signal for each band; a TBU (TDD Band Unit) connected to the DMXM, amplifying and gain-adjusting the TDD signal for each band, and using a TDD switching signal transmitted from the TSM to temporally separate DL and UL via an RF switch; a MIMO TDD Band Unit (MMBU) ​​connected to the DBPM, amplifying and gain-adjusting the TDD MIMO signal for each band, and using a TDD switching signal transmitted from the TSM to temporally separate DL and UL via an RF switch; a TG (Tone Generator) connected to the BU, TBU, and MMBU and supplying a band-specific tone to the BU, TBU, and MMBU; an ST (Sync Tx) connected to the TSM, receiving a TDD switching signal, outputting a synchronous discontinuous CW signal, and providing the signal to a slave unit via the SMXM; The MMOD is in charge of communicating with all slave units, and the TSM and TG, MPSU (MU Power Supply Unit), ST, BU for each band, TBU and MMBU are controlled and monitored by the MCU (Master Unit Control Unit).

3. The multi-band distribution device according to claim 2, wherein the ST includes an STSW (ST RF switch) that receives a synchronous switching signal from the TSM and switches on and off the CW signal output from the CG (CW Generator), and a CG that outputs the CW signal.

4. The master unit a TGSW (TG RF switch) connected to the TG and located in each band's BU, TBU, and MMBU, passing band-specific tone signals transmitted from the TG and blocking band-specific service signals; MIDET (Master Unit Input Detector) is located at the input side of each band BU, TBU, and MMBU, and outputs band-specific input level information as voltage and transmits it to the MCU; MODETs (Master Unit Output Detectors) are located at the output side of each band-specific BU, TBU, and MMBU, and output band-specific output level information as voltages and transmit them to the MCU; 3. The multi-band distribution device of claim 2, further comprising: an MCU that controls ON / OFF of the band-specific tones of the TG, controls the on / off of the band-specific TGSW, checks output level information of the MODET for each band, adjusts gains in the BU, TBU, and MMBU for each band, and controls and monitors so that a designated tone output for each band is transmitted to the slave unit; calculates a band-specific line loss value between the master unit and the slave unit using the tone output level value of the slave unit transmitted via the SMOD and SCU of the slave unit; communicates with the SMOD via the MMOD; controls the band-specific DL gain of the slave unit on the DL path via the SCU to output at a designated level, thereby performing loss compensation for the DL band; and controls the UL gain of the master unit on the UL path, reflecting the calculated line loss value, thereby performing loss compensation for the UL band.

5. The slave unit a DSBT (Donor Slave Unit Bias-T) that separates the DC power input from the master unit via a coaxial line from the service signal of the master unit, and transmits the DC power to an SP (Slave Unit Power) and the service signal to a DMXS (Donor Multiplexer for Slave Unit); an SP (slave unit power) connected to the DSBT, receiving DC power to supply power to the slave unit, and transmitting the DC power to an SSBT (service slave unit Bias-T); a Donor Multiplexer for Slave Unit (DMXS) connected to the DSBT for performing band-specific classification and filtering; a slave unit MODEM (SMOD) that communicates with the master unit MMOD; an SR (slave unit Rx) that receives a synchronous intermittent CW signal from the ST of the master unit and outputs a TDD switching control signal; a band allocation module (BM) connected to the DMXS and SMXS and amplifying and adjusting the gain for each FDD band; a TDD Band Module (TBM) connected to the DMXS and SMXS, amplifying and gain-adjusting the TDD band, and temporally separating DL and UL via an RF switch using a TDD switching signal transmitted from the SR; a Service Multiplexer for Slave Unit (SMXS) connected to the BM and TBM and performing band division and filtering; a CPL (Combiner) connected to the SMXS and transmitting a service signal to an SSBT (Service Slave Unit Bias-T) in order to transmit the service signal to another slave unit and to a slave unit antenna in order to transmit the service signal to a terminal by radio; a Service Slave Unit Bias-T (SSBT) connected to the SP, combining a DC power source transmitted from the SP with a service signal transmitted from the CPL, and transmitting the combined signal to another slave unit via a coaxial line; a DBPS (Donor BPF for Slave Unit) for filtering the MIMO signal received from the master unit; a MIMO TDD Band Module (MMBM) connected to the DBPS, amplifying and gain-adjusting a MIMO signal, and temporally separating DL and UL via an RF switch using a TDD switching signal transmitted from the SR; a Service BPF for Slave Unit (SBPS) connected to the MMBM and performing filtering; a MIMO coupler (MCPL) connected to the SBPS and transmitting a service signal to an antenna and then to another slave unit via a coaxial line; 2. The multi-band distribution device according to claim 1, further comprising: an SCU (Slave Unit Control Unit) that controls the SMOD to communicate with a master unit and controls and monitors the SP, SR, BM, TBM and MMBM.

6. The SR is An SRCPL (SR Coupler) that transmits a synchronous intermittent CW signal transmitted from the ST of the master unit via a coaxial line and input via the DMXS to the SMXS, transmits the signal to other slave units via a coaxial line, and transmits the signal to a PD (Power Detector) via a coupling port; a power detector (PD) that detects the power level of the synchronous intermittent CW signal input from the SRCPL and outputs the detected power level as a voltage; a discriminator (DIS) that compares the input voltage transmitted from the PD with a designated reference voltage and restores and outputs a TDD switching signal; 6. The multi-band distribution device of claim 5, further comprising: a BINV (Buffer / Inverter) that buffers and inverts the TDD switching signal input from the DIS, and transmits the buffered TDD switching control signal and the inverted TDD switching control signal to the RF switches of the TBM and MMBM.

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