JP2010178479A - Base station device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base station device with a UPS function, which has high versatility and high efficiency of electric power. <P>SOLUTION: The base station device has a wireless communication unit that receives power supply by a first path or a second path. The first path includes a circuit for converting AC input from a commercial power supply into DC output, and a first DC voltage converting circuit for the wireless communication unit that supplies a voltage of the DC output after converting it into a voltage matching the wireless communication unit. The second path includes a DC voltage converting circuit for an auxiliary power supply that supplies a voltage of DC output from an AC/DC conversion circuit after converting it into a voltage matching the auxiliary power supply, and a second DC voltage converting circuit for the wireless communication unit that supplies a voltage of DC output, to be supplied from the auxiliary power supply, after converting it into a voltage matching the wireless communication unit. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a base station apparatus, and more particularly to a base station apparatus that receives power supply from a power supply apparatus having a function of UPS (Uninterruptible Power Supply).

  In order to be able to perform stable communication at any time using a wireless communication terminal such as a mobile phone, it is necessary to always supply power to the base station apparatus that communicates with the wireless communication terminal. . However, if the supply of power is interrupted or a power failure occurs, the supply of power to the base station device is interrupted and communication is disconnected. Therefore, in a communication system in which communication stability is regarded as important, a base station apparatus is provided with a UPS (uninterruptible power supply) function to prepare for temporary interruption of power supply.

  The UPS is a power supply device that can continue to supply emergency power without a power outage for a certain period of time even if an abnormality occurs in the input power supply due to, for example, a power outage. Currently, various UPSs are installed for various devices that require stable operation, such as servers on a network. In general, information communication can be said to be a lifeline in modern life. Especially in mobile phone calls and data communication, highly stable operation is provided in preparation for calls and communications performed in the event of a user's emergency. Is required. Therefore, at present, some communication systems are obliged to install UPS due to legal requirements.

  As a conventional UPS, one that has a built-in generator and can withstand a power outage for a relatively long period is known. On the other hand, since it is necessary to install an extremely large number of base station devices in mobile phone communications, UPSs with a built-in secondary battery such as a battery are often used as an auxiliary power source as a simpler configuration. Yes. In particular, recently, not only base stations that have relatively large cubicles dedicated to power supply devices including UPS, but also small base station devices installed on concrete pillars, etc., and small-sized built-in secondary batteries in the vicinity. A UPS unit is often installed. Such a UPS normally supplies power to the base station apparatus while charging the secondary battery. When an abnormality occurs in the input power supply, the UPS continues to supply power using the charged secondary battery. For reference, for example, a base station apparatus having a backup power source using such a secondary battery as described in Patent Document 1 has been proposed.

JP 2000-166126 A

  At present, base station apparatuses that communicate with a wireless communication terminal such as a mobile phone are roughly classified into two types of UPS, an AC output system and a DC output system, as follows. . Hereinafter, a schematic configuration of a base station apparatus using such conventional UPS will be described with reference to the drawings. In the following drawings, portions related to power supply will be mainly described, and description of functions of the base station apparatus related to data communication and the like will be omitted.

  FIG. 4 is a block diagram showing a schematic configuration of a base station apparatus using a conventional AC output type UPS. The base station apparatus 100 shown in FIG. 4 operates by receiving power of AC 100 V (volt) from a power supply unit (hereinafter referred to as “attached box”) 200 having a UPS function.

  The base station apparatus 100 includes an AC / DC conversion circuit 110, an RF unit 120, and a baseband unit 130. The AC / DC conversion circuit 110 converts the input of AC 100V supplied from the auxiliary box 200 into a DC output. Of the DC output converted by the AC / DC conversion circuit 110, DC 50V is supplied to the RF unit 120, and DC 5V is supplied to the baseband unit 130. The RF unit 120 includes an antenna 140 for performing wireless communication.

  The incidental box 200 receives a commercial AC 100 V supply from the outside and supplies an AC 100 V output to the base station apparatus 100, while using a part of the external power supply to the battery 500, which is a secondary battery. We are also charging. In order to charge the battery 500, the accessory box 200 includes a PFC rectifier 210, a charge / discharge control circuit 220, and an inverter 230. A PFC (Power Factor Correction) rectifier 210 is a rectifier (high power factor rectifier circuit) having a function of power factor correction, and converts AC into DC. The charge / discharge control circuit 220 controls the charging of the battery 500 using the DC output from the PFC rectifier 210. The charge / discharge control circuit 220 also performs control for inputting the DC output discharge from the battery 500 to the inverter 230. Inverter 230 converts a DC input generated by discharging from battery 500 into an AC output.

  As described above, the auxiliary box 200 uses the commercial AC100V to supply the AC100V output to the base station apparatus 100. When the commercial AC100V supply is interrupted, the auxiliary box 200 receives the backup (standby) power from the battery 500. Switch to power supply. The power supply by such a method is adopted in some of the current base station apparatuses.

  In general, an AC output type UPS receives an AC 100V input and outputs an AC 100V. Therefore, a base station apparatus used for an AC output type UPS can also support an auxiliary box having no UPS function. Also, a base station apparatus using an AC output type UPS can directly receive commercial AC 100 V supply when the UPS function of the attached box breaks down. Furthermore, since power can be directly input from a commercial power supply, there is little reduction in power efficiency due to UPS.

  However, the AC output type UPS has a complicated circuit configuration, and there is a concern that the cost increases accordingly. In addition, since a PSU (Power Supply Unit (power supply unit)) including an AC / DC conversion circuit in a base station apparatus is more complicated than a PSU configuration including a DC / DC conversion circuit, the circuit scale may be increased. Or the cost may increase.

  FIG. 5 is a block diagram showing a schematic configuration of a base station apparatus using a conventional DC output type UPS. A base station apparatus 300 shown in FIG. 5 operates by receiving DC-48V power supplied from a power supply unit (hereinafter referred to as “attached box”) 400 having a UPS function.

  Base station apparatus 300 has the same configuration as that of base station apparatus 100 described above except that AC / DC conversion circuit 110 is changed to DC / DC conversion circuit 310 in base station apparatus 100 described with reference to FIG. The DC / DC conversion circuit 310 converts a DC-48V DC input voltage supplied from the accessory box 400. Of the DC output whose voltage is converted by the DC / DC conversion circuit 310, DC 50V is supplied to the RF unit 120, and DC 5V is supplied to the baseband unit 130.

  The attached box 400 includes a PFC rectifier 410, a DC / DC conversion circuit 420, and a battery 500. The PFC rectifier 410 converts a commercial AC 100V input supplied from the outside into a DC output. The DC / DC conversion circuit 420 converts the DC output voltage from the PFC rectifier 410 into DC-48V and inputs the DC-48V to the base station apparatus 300. Further, the DC / DC conversion circuit 420 can charge the battery 500 by using the DC output converted into DC-48V.

  As described above, the auxiliary box 400 uses the commercial AC100V to supply the DC-48V output to the base station apparatus 300, and when the commercial AC100V supply is interrupted, the power from the backup power source by the battery 500 is supplied. Can switch to supply. The power supply by such a method is adopted in many of the current mobile phone base station apparatuses.

  As described above, these incidental boxes 200 and 400 normally use the commercial AC 100V supplied from the outside to supply power to the base station apparatuses 100 and 300 and, as necessary, the battery 500. Charging can be performed. Further, when the supply of commercial AC100V from the outside is interrupted due to a temporary power failure or the like, it is possible to continue supplying power to the base station apparatuses 100 and 300 by using the power of the charged battery 500. .

  In general, a DC output type UPS has a relatively simple circuit configuration, and can be expected to reduce costs. In addition, since the PSU including the DC / DC conversion circuit in the base station apparatus becomes simpler than the configuration of the PSU including the AC / DC conversion circuit, the circuit scale can be reduced or cost reduction can be expected.

  On the other hand, a DC output type UPS requires a PFC rectifier when receiving commercial AC 100V supply. Also, when a DC output type UPS fails, DC-48V power cannot be supplied, and the operation of the base station apparatus must be stopped. Furthermore, the power conversion efficiency of the base station apparatus using the DC output type UPS is obtained by multiplying the conversion efficiency of the PFC rectifier of the UPS by the conversion efficiency of the PSU of the base station apparatus. There is also a concern that will decline.

  As described above, both the case of using the conventional AC output type UPS and the case of using the conventional DC output type UPS have advantages and disadvantages. Therefore, it is necessary to select a combination of a base station apparatus and an attached box that can supply power appropriately according to the specifications of the communication system, requirements in the environment where the base station apparatus is installed, and the like.

  However, the conventional base station apparatus as described above must use an AC output type UPS for a base station apparatus that supports AC input, and a DC output type UPS for a base station apparatus that supports DC input. Must be used. Therefore, these combinations cannot be changed and used. That is, the conventional base station apparatus cannot support both an AC input power source and a DC input power source. For example, when a base station of a new system is added to a base station of another system that has already been installed, a DC-48V power supply may already be secured. In such a case, if the base station of the new system does not support the DC input power source, a new AC power source must be secured.

  Also, there are systems that require (essential) UPS functions depending on the specifications of the communication system, and systems that do not. However, since the presence / absence of the UPS function is determined by the specifications of the attached box, the presence / absence of the UPS function cannot be changed except by changing the attached box.

  Furthermore, conventionally, the battery is often stored in an accessory box separate from the base station apparatus, and it has been difficult to control the function of charging / discharging the battery from the base station apparatus. Further, since this battery is stored in the accessory box, for example, when a problem occurs in the battery, it is a troublesome work to replace only the battery.

  In addition, as shown in FIG. 5, the power supply by the DC output method adopted in many of the current mobile phone base stations is the DC / DC conversion circuit 310 when the battery 500 supplies the DC input power. Therefore, it is possible to perform power conversion with high efficiency. However, when supplying AC input power with a commercial AC of 100V during normal operation, the DC / DC conversion circuit 310 is converted to DC-48V before reaching the block of the DC / DC conversion circuit 310. There must be. When power conversion is performed in a plurality of stages as described above, there is a problem that power efficiency is lowered.

  In the power supply by the DC output method as shown in FIG. 5, the PFC rectifier 410 has a configuration separate from the DC / DC power supply unit inside the base station apparatus. For this reason, when the total cost including the incidental box 400 is taken into consideration, there is a risk that the cost will eventually increase.

  Therefore, an object of the present invention made in view of such circumstances is to provide a base station apparatus having a UPS function that is highly versatile and has high power efficiency.

The invention according to claim 1 that achieves the above object is as follows:
In a base station apparatus having a wireless communication unit that receives power supplied from a first power supply path or a second power supply path,
The first power supply path is:
An AC / DC conversion circuit that converts an AC input from a commercial power source into a DC output, and a voltage of the DC output is converted so as to be compatible with the wireless communication unit, and the DC output obtained by converting the voltage is supplied to the wireless communication unit. A first wireless communication unit DC voltage conversion circuit to supply,
The second power supply path is:
A DC voltage conversion circuit for auxiliary power supply that converts the voltage of the DC output from the AC / DC conversion circuit so as to be compatible with an auxiliary power supply, and supplies a DC output obtained by converting the voltage to the auxiliary power supply, and the auxiliary power supply A second DC voltage conversion circuit for a wireless communication unit that converts the DC output voltage supplied from the second communication unit so as to be compatible with the wireless communication unit, and supplies the converted DC output to the wireless communication unit. It is characterized by including.

The invention according to claim 2 is the base station apparatus according to claim 1,
The second wireless communication unit DC voltage conversion circuit is adapted to boost the DC output supplied from the auxiliary power supply, and to adapt the voltage of the DC output boosted by the boosting circuit to the wireless communication unit. And a first DC voltage conversion circuit for a wireless communication unit that supplies a DC output obtained by converting the voltage to the wireless communication unit.

The invention according to claim 3 is the base station apparatus according to claim 1,
The first DC voltage conversion circuit for the wireless communication unit converts the voltage of the DC output from the AC / DC conversion circuit and supplies the voltage to the wireless communication unit, as well as the AC voltage from the AC / DC conversion circuit. The auxiliary power supply DC voltage conversion circuit has a function of converting a DC output voltage and supplying the converted voltage to the auxiliary power supply.

  According to the base station apparatus of the present invention, the power supplied to the wireless communication unit is converted to the DC output from the commercial AC input, and then supplied to the wireless communication unit, or the commercial AC input is assisted. The output can be converted into a DC output for power supply, and the DC output supplied from the auxiliary power supply can be input from the second path supplying the wireless communication unit. Therefore, the base station apparatus of the present invention can use this battery for the UPS function if a battery is used as an auxiliary power source. If the battery is not used, the base station apparatus can use a DC from another supply source as an auxiliary power source. Output can also be input. For this reason, the base station apparatus of this invention can respond | correspond to the input from various power supplies, AC input and DC input, and can improve versatility remarkably. In addition, since the number of stages for converting power can be reduced, power efficiency can be improved.

It is a block diagram which shows schematic structure of the base station apparatus which concerns on 1st Embodiment. It is a block diagram which shows schematic structure of the base station apparatus which concerns on 2nd Embodiment. It is a figure explaining the installation aspect of the base station apparatus by this invention. It is a block diagram which shows schematic structure of the base station apparatus using the UPS of the conventional AC output system. It is a block diagram which shows schematic structure of the base station apparatus using UPS of the conventional DC output system.

  Embodiments of the present invention will be described below with reference to the drawings. Each embodiment according to the present invention will be described assuming a base station apparatus that performs wireless communication with a mobile phone. However, the present invention is not limited to a base station device that performs radio communication with a mobile phone, and any base station device that performs communication by supplying power to a radio communication unit. Can be applied. Moreover, in the following description, the part which concerns mainly on supply of electric power is demonstrated, and detailed description about the communication function of the base station apparatus which concerns on data communication etc. is abbreviate | omitted.

(First embodiment)
FIG. 1 is a diagram illustrating a schematic configuration of a base station apparatus according to the first embodiment of the present invention. The base station apparatus 10 according to the first embodiment shown in FIG. 1 performs an operation related to communication by receiving a commercial AC 100V supply from the outside. Moreover, the base station apparatus 10 can connect the battery 50 which is a secondary battery in preparation for the case where supply of electric power stops temporarily.

  The base station apparatus 10 according to the first embodiment includes a PFC rectifier 12, a DC / DC conversion circuit 14, an RF unit 16, a baseband unit 18, and an antenna 20.

  PFC (Power Factor Correction: Power Factor Correction) Rectifier 12 is a rectifier (high power factor rectifier circuit) that has a power factor correction function, and converts AC 100V AC input from the outside into DC output. To do. At this time, commercial AC 100V AC input from the outside is converted to DC output of about DC 300V to 400V. The DC / DC conversion circuit 14 converts the DC output from the PFC rectifier 12 into a DC output of DC 50V and DC 5V. Of the DC output converted by the DC / DC conversion circuit 14, DC 50 V is input to the RF unit 16, and DC 5 V is input to the baseband unit 18. The baseband unit 18 generates a baseband signal by modulating a carrier wave. The RF unit 16 converts the baseband signal into an RF signal, and transmits this RF signal from the antenna 20. In the present embodiment, the radio communication unit is configured including the RF unit 16, the baseband unit 18, and the antenna 20.

  In the present embodiment, the above-described power supply path that is supplied to the wireless communication unit after converting a commercial AC 100V AC input from the outside into a DC output is referred to as a “first power supply path”. That is, the first power supply path includes a PFC rectifier 12 that converts an AC input from a commercial power source into a DC output, and converts the DC output voltage to be compatible with the wireless communication unit, and the DC output is converted to a wireless communication unit. And a DC / DC conversion circuit 14 to be supplied.

  The base station apparatus 10 includes a charging DC / DC conversion circuit 22 and a booster circuit 24. The charging DC / DC conversion circuit 22 converts the voltage of the DC output from the PFC rectifier 12 and converts it into a charging voltage for charging the battery. The booster circuit 24 boosts the DC output from the auxiliary power supply and inputs the boosted DC output to the DC / DC conversion circuit 14.

  In the present embodiment, a path for converting an AC input of commercial AC 100V from the outside into a DC output for auxiliary power supply, and a path for boosting and voltage converting the DC output from the auxiliary power supply and supplying it to the wireless communication unit And “second power supply path”. That is, the second power supply path converts the DC output voltage from the PFC rectifier 12 so as to be compatible with the auxiliary power source, and supplies the DC output to the auxiliary power source. A step-up circuit 24 and a DC / DC conversion circuit 14 that convert a DC output voltage supplied from a power supply so as to be compatible with the wireless communication unit, and supply a DC output obtained by converting the voltage to the wireless communication unit. It is out.

  In the present embodiment, the charging DC / DC conversion circuit 22 constitutes an auxiliary power supply DC voltage conversion circuit. The second DC voltage conversion circuit for the wireless communication unit is adapted to the booster circuit 24 that boosts the DC output supplied from the auxiliary power supply, and the voltage of the DC output boosted by the booster circuit 24 is adapted to the wireless communication unit. And a DC / DC conversion circuit 14 which is a first DC voltage conversion circuit for the wireless communication unit that converts the output and supplies the DC output to the wireless communication unit.

  The battery 50 is supplied with a DC output from the charging DC / DC conversion circuit 22 during charging, and supplies a DC output of DC-48V to the booster circuit 24 during discharging. Therefore, the base station apparatus 10 can be used as a base station apparatus having a UPS function when used in a configuration using the battery 50. However, the battery 50 is not an essential element of the present embodiment. When the battery 50 is not used, the base station apparatus 10 according to the present embodiment can also operate by receiving a DC-48V DC input from the outside via, for example, an auxiliary power supply battery connection port.

  As described above, when the base station apparatus 10 is used in a configuration that does not use the battery 50, the base station apparatus 10 can be used as a base station apparatus with a normal power supply that does not have a UPS function. In this case, the base station apparatus 10 can use an external power supply by adapting to both a commercial AC 100V AC input and a DC-48V DC input. Therefore, when the base station apparatus 10 is installed in the base station of another system where a DC-48V power supply is already installed, it is not necessary to secure a new AC power supply, and a DC-48V power supply is not required. Can respond immediately.

  Moreover, since the base station apparatus 10 is the structure which contains the PFC rectifier 12 inside, when using a power supply unit like an incidental box, the said incidental box can be set as the structure only of the battery 50. FIG. Therefore, the function of charging / discharging the battery 50 can be controlled from the base station apparatus 10, and further, when a malfunction occurs in the battery 50, the work of replacing only the battery 50 can be completed. Since base station apparatus 10 includes PFC rectifier 12 therein, PFC rectifier 12 and the DC / DC power supply unit inside base station apparatus 10 are integrated. For this reason, reduction of the total cost concerning manufacture of the base station apparatus 10 can be expected.

  With the configuration as described above, the base station device 10 performs power conversion only after passing through the block of the DC / DC conversion circuit 14 after passing through the PFC rectifier 12 when using the AC input of commercial AC 100V in the normal state. Do. Therefore, the base station apparatus 10 according to the present embodiment can be expected to have an effect of improving the power efficiency as compared with the case where the conventional DC output type auxiliary box as described in FIG. 5 is used.

(Second Embodiment)
Next, a broadcast receiving apparatus according to the second embodiment of the present invention will be described. FIG. 2 is a diagram illustrating a schematic configuration of a base station apparatus according to the second embodiment of the present invention. The base station apparatus 30 according to the second embodiment changes a part of the internal configuration of the base station apparatus 10 according to the first embodiment described above. Therefore, the same description as that of the base station apparatus 10 according to the first embodiment is omitted as appropriate.

  The base station apparatus 30 according to the second embodiment shown in FIG. 2 performs an operation related to communication by receiving a commercial AC 100V supply from the outside. Similarly to the base station apparatus 10 according to the first embodiment described above, the base station apparatus 30 can connect a battery 50 that is a secondary battery in preparation for a case where the supply of power is temporarily interrupted. .

  Similarly to the base station apparatus 10 according to the first embodiment described above, the base station apparatus 30 according to the second embodiment includes the PFC rectifier 12, the RF unit 16, the baseband unit 18, and the antenna 20. I have. The base station device 30 according to the second embodiment further includes a DC / DC conversion circuit (also as a charging DC / DC conversion circuit) 32 and another DC / DC conversion circuit 34.

  In the base station apparatus 30 according to the second embodiment, the PFC rectifier 12 is a rectifier (high power factor rectifier circuit) having a power factor improving function, and an AC input of commercial AC100V from the outside is about DC300V to 400V. To DC output. The DC / DC conversion circuit (also serving as a DC / DC conversion circuit for charging) 32 converts the DC output from the PFC rectifier 12 into a DC output of DC 50V and DC 5V. Of the DC output converted by the DC / DC conversion circuit 14, DC 50 V is input to the RF unit 16, and DC 5 V is input to the baseband unit 18. Also in the present embodiment, the radio communication unit is configured including the RF unit 16, the baseband unit 18, and the antenna 20.

  In the second embodiment, the above-described power supply path that is supplied to the wireless communication unit after converting a commercial AC 100V AC input from the outside into a DC output is referred to as a “first power supply path”. That is, the first power supply path includes a PFC rectifier 12 that converts an AC input from a commercial power source into a DC output, and converts the DC output voltage to be compatible with the wireless communication unit, and the DC output is converted to a wireless communication unit. DC / DC conversion circuit (also serving as a charging DC / DC conversion circuit) 32.

  In the base station device 30 according to the present embodiment, the DC / DC conversion circuit (also serving as a DC / DC conversion circuit for charging) 32 converts the voltage of the DC output from the PFC rectifier 12 and performs charging for charging the battery. Convert to voltage. The DC / DC conversion circuit 34 converts the DC output from the auxiliary power source into DC output of DC 50V and DC 5V. Of the DC output converted by the DC / DC conversion circuit 34, DC 50 V is input to the RF unit 16, and DC 5 V is input to the baseband unit 18.

  In the second embodiment, a path for converting an AC input of commercial AC 100V from the outside into a DC output for auxiliary power, and a path for converting the voltage of the DC output from the auxiliary power supply to the wireless communication unit And “second power supply path”. That is, the second power supply path converts the DC output voltage from the PFC rectifier 12 so as to be compatible with the auxiliary power source, and supplies the DC output to the auxiliary power source (also serving as a DC / DC for charging). DC conversion circuit) 32, and a DC / DC conversion circuit 34 for converting the DC output voltage supplied from the auxiliary power supply so as to be compatible with the wireless communication unit, and supplying the DC output obtained by converting the voltage to the wireless communication unit , Including.

  In the second embodiment, the DC / DC conversion circuit (also serving as a DC / DC conversion circuit for charging) 32 converts the voltage of the DC output from the PFC rectifier 12 in the first power supply path to perform wireless communication. An AC / AC conversion circuit to be supplied to the unit is configured. At the same time, the DC / DC converter circuit (also serving as a DC / DC converter circuit for charging) 32 converts the voltage of the DC output from the PFC rectifier 12 and supplies it to the auxiliary power source in the second power supply path. The DC voltage conversion circuit for the wireless communication unit is configured.

  Also in the second embodiment, the battery 50 can be handled in the same manner as in the first embodiment. Therefore, the base station apparatus 30 can be used as a base station apparatus having a UPS function when used in a configuration using the battery 50. Moreover, when using it by the structure which does not use the battery 50, the base station apparatus 30 can be utilized as a base station apparatus by the normal power supply which does not have a UPS function. At this time, the base station device 30 can use an external power supply by adapting both a commercial AC 100V AC input and a DC-48V DC input.

  Thus, the base station apparatus 30 according to the present embodiment can achieve the same effects as the base station apparatus 10 according to the first embodiment with a very simple configuration.

  Further, when the base station apparatus 30 receives and uses an AC input of commercial AC 100V in a normal state, it is first to perform power conversion only after passing through the block of the DC / DC conversion circuit 32 after passing through the PFC rectifier 12. This is the same as the base station apparatus 10 according to the embodiment. Furthermore, the base station apparatus 30 performs power conversion only through one block of the DC / DC conversion circuit 34 when receiving and using DC input by DC-48V from the auxiliary power supply. For this reason, the base station apparatus 30 according to the second embodiment can be expected to improve the power efficiency of the base station apparatus 10 according to the first embodiment as the overall power efficiency.

  Hereinafter, an aspect when the base station apparatus according to the first embodiment or the second embodiment described above is actually installed will be described. FIG. 3 is a diagram illustrating an installation mode of the base station apparatus according to the first embodiment or the second embodiment described above.

  As shown in FIG. 3, the base station apparatus 10 or 30 can be installed on a concrete pillar 70 or the like as a small base station apparatus that performs wireless communication with a terminal such as a mobile phone. Base station apparatus 10 or 30 is connected to antenna 20 for performing wireless communication with a terminal such as a mobile phone. The base station apparatus 10 or 30 is connected to a backhaul, which is a network connecting base stations, via a dedicated line or an optical fiber cable. Through this backhaul, the base station apparatus 10 or 30 can also be controlled from the outside.

  FIG. 3A schematically shows a state where the base station apparatus 10 or 30 is installed together with the battery 50. The base station device 10 or 30 operates by receiving commercial AC 100 V power supply from the outside during normal use. However, in the event of an emergency such as a power failure, the operation can be continued by receiving a DC-48V power supply from the battery 50 as an auxiliary power source. Thus, only the battery 50 needs to be prepared as an emergency external power supply for operating the base station apparatus 10 or 30. Therefore, a device such as an accessory box for incorporating the battery 50 can be simplified and miniaturized. For this reason, installation space can also be saved.

  FIG. 3B schematically shows a state where the base station device 10 or 30 is installed without using the battery 50. In this case, the operation cannot be continued by receiving power supply from the battery 50 in an emergency such as a power failure. However, in this case, the base station device 10 or 30 can support both commercial AC100V and DC-48V as external power supply during normal use. Therefore, for example, when there is a UPS device already used in the conventional base station apparatus, it can be connected to the UPS apparatus and used.

  When the battery 50 is connected, the battery connection terminal is provided inside the base station, so that the battery charge / discharge function can also be performed from the base station. Further, in this case, when a problem occurs in the auxiliary power supply, the function of the base station apparatus can be restored only by performing the work of replacing the battery 50, so that the maintenance becomes remarkably easy.

  Furthermore, when only the base station apparatus 10 or 30 is installed and operated without using the battery 50 at first, and the operation by the auxiliary power supply in the emergency is necessary, the battery 50 is additionally installed later. Embodiments are also conceivable. In this way, it is possible to disperse the cost for capital investment and make a stepwise investment.

  In addition, this invention is not limited only to each embodiment mentioned above, Many changes or deformation | transformation are possible. In particular, in the description of the mode for carrying out the invention described above, the portion related to the power supply of the base station apparatus has been mainly described, and the configuration and installation mode related to other communication functions are as follows. Those skilled in the art can implement the invention with appropriate modifications.

10, 30, 100, 300 Base station device 12, 210, 410 PFC rectifier 14, 34, 310, 420 DC / DC conversion circuit 16, 120 RF unit 18, 130 Baseband unit 20, 140 Antenna 22 DC / DC for charging Converter circuit 24 Booster circuit 32 DC / DC converter circuit / DC / DC converter circuit for charging 50,500 Battery 70 Concrete pillar 110 AC / DC converter circuit 200,400 Attached box 220 Charge / discharge control circuit 230 Inverter

Claims (3)

In a base station apparatus having a wireless communication unit that receives power supplied from a first power supply path or a second power supply path,
The first power supply path is:
An AC / DC conversion circuit that converts an AC input from a commercial power source into a DC output, and a voltage of the DC output is converted so as to be compatible with the wireless communication unit, and the DC output obtained by converting the voltage is supplied to the wireless communication unit. A first wireless communication unit DC voltage conversion circuit to supply,
The second power supply path is:
A DC voltage conversion circuit for auxiliary power supply that converts the voltage of the DC output from the AC / DC conversion circuit so as to be compatible with an auxiliary power supply, and supplies a DC output obtained by converting the voltage to the auxiliary power supply, and the auxiliary power supply A second DC voltage conversion circuit for a wireless communication unit that converts the DC output voltage supplied from the second communication unit so as to be compatible with the wireless communication unit, and supplies the converted DC output to the wireless communication unit. A base station apparatus comprising:   The second wireless communication unit DC voltage conversion circuit is adapted to boost the DC output supplied from the auxiliary power supply, and to adapt the voltage of the DC output boosted by the boosting circuit to the wireless communication unit. The base station apparatus according to claim 1, further comprising: a first DC voltage conversion circuit for a radio communication unit that converts the voltage into a DC output and converts the DC output into the radio communication unit.   The first DC voltage conversion circuit for wireless communication unit converts the voltage of the DC output from the AC / DC conversion circuit and supplies the voltage to the wireless communication unit, and the DC voltage conversion circuit from the AC / DC conversion circuit. The base station apparatus of Claim 1 provided with the function of the DC voltage conversion circuit for said auxiliary power supplies which converts the voltage of DC output and supplies it to the said auxiliary power supply.

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