Wireless communication unit

Abstract

To provide a radio communication unit that prevents malfunction of a radio base station module and an EPC module malfunction and the risk of operating as a radio wave interference source for other radio systems in a case of abnormality such as a failure of a cooling device, a temperature rise, etc., in a portable housing.SOLUTION: A radio communication unit has a communication body part, including a radio base station module and an EPC module, integrated in a portable housing, and a base station function program and an EPC function program start up on receiving an input of a main start-up signal to execute communication control. A general control module is provided in addition to the radio base station module and EPC module, and the general control module acquires operation environment information including internal temperature information on the portable housing, and determines whether the operation environment of the communication body part becomes abnormal. When no operation environment abnormality is occurring, a body start-up command is not transmitted, and start-up processing on the base station function program and EPC function program of the communication body part is not executed.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a wireless communication unit in which the functions of a base station apparatus and a core network (EPC) are integrated into a portable housing and capable of performing wireless network communication with a mobile terminal according to a communication protocol stack defined by 3GPP (Third Generation Partnership Project).

Background Art

[0002] In a wireless communication network conforming to a high-speed communication standard based on 3GPP specifications (for example, LTE (Long Term Evolution) or WiMAX (Worldwide Interoperability for Microwave Access)), it is essential to construct an EPC (Evolved Packet Core) that accommodates a wireless communication access network within an area, and a radio base station to which a mobile terminal is connected receives control of transmission and reception of IP packets via the EPC. On the other hand, with the spread of mobile terminals such as mobile phones, smartphones, or tablet PCs, there is an increasing demand to use mobile terminals even in areas where the EPC and radio base stations are not infrastructurally prepared, such as at sea, in depopulated areas, or areas where the communication function has been lost due to disasters or the like (hereinafter referred to as "wireless unprepared areas").

[0003] In order to meet such demands, for example, Patent Document 1 proposes a composite wireless communication unit in which a radio base station and a core network (EPC) are integrated. By installing such a wireless communication unit in a wireless unprepared area as described above, a small-scale communicable area is constructed by a radio base station module included in the unit, and the EPC module in the unit performs upper-layer communication control, so that wireless communication conforming to 3GPP specifications can be performed between a plurality of mobile terminals connected to the radio base station module.

Prior Art Documents

Patent Documents

[0004] Patent Document 1 Japanese Patent Application Laid-Open No. 2016-12841 Summary of the Invention Problems to be Solved by the Invention

[0005] In the wireless communication unit as described above, among the hardware modules housed in the housing, particularly the radio base station module and the power supply module that supplies the power voltage to the radio base station module consume a large amount of power and generate significant heat because the radio base station is equipped with a high-output radio wave transmission unit. Therefore, it is essential to cool the inside of the housing with a cooling mechanism such as a fan. However, if an abnormality such as a failure occurs in the cooling mechanism and it stops operating properly, there is a risk that the radio base station and the EPC will malfunction due to the temperature rise, or that they will operate as a radio wave interference source for other radio systems. In addition, if the control programs of the radio base station and the EPC are started in a state where the temperature has risen and normal operation cannot be expected, the programs may run wild and there is a risk that the software data will be destroyed. In particular, when the radio base station module and the EPC module are integrated into the same housing instead of being separate units, when the inside of the housing heats up, these two modules will be exposed to high temperatures at the same time. In particular, if the control programs of these two modules are configured to be started collectively by a single switch operation or the like, the risk of the above problems occurring simultaneously in the two modules increases, and the impact is particularly serious.

[0006] An object of the present invention is to provide a wireless communication unit that can prevent the risk that the internal radio base station module and the EPC module malfunction or operate as a radio wave interference source for other radio systems when an abnormality such as a malfunction or a temperature rise occurs in the cooling device inside the portable housing. Means for Solving the Problems

[0007] To solve the above problems, the wireless communication unit of the present invention includes a wireless communication unit that performs wireless communication based on 3GPP specifications with a mobile terminal, a base station function program storage unit, and a base station computer that starts up and executes the base station function program stored in the base station function program storage unit by receiving a main body startup command and performs wireless communication control on the wireless communication unit. A wireless base station module, a wired connection to the wireless base station module, an EPC (Evolved Packet Core) function program storage unit, and an EPC computer that starts up and executes the EPC function program stored in the EPC function program storage unit by receiving a main body startup command and performs upper network control on the wireless base station module based on the execution. A communication main body unit including an EPC module, a power supply module that supplies an operating voltage to the communication main body unit, a portable housing that integrally houses the communication main body unit and the power supply module, a main startup signal reception unit that receives an input of a main startup signal, and an operation environment information acquisition unit that acquires operation environment information of the communication main body unit in the portable housing so as to include internal temperature information of the portable housing in accordance with the reception of the main startup signal. An operation environment abnormality determination unit that determines whether or not an abnormality has occurred in the operation environment of the communication main body unit based on the acquired operation environment information, a main body startup command transmission unit that transmits a main body startup command to the communication main body unit only when no operation environment abnormality has occurred, and an operation environment abnormality notification unit that outputs an operation environment abnormality notification when an operation environment abnormality has occurred. It is characterized by including a unified control module.

[0008] The wireless communication unit of the present invention can be configured such that the main startup signal is input to the main startup signal reception unit in accordance with the operation of one predetermined startup switch.

[0009] The wireless communication unit of the present invention can be provided with a cooling device for cooling the internal space of the portable housing. In this case, the operating environment information acquisition unit can be configured to acquire the operating environment information including the driving state information of the cooling device. In this case, the operating environment abnormality determination unit of the overall control module can be configured to determine that an operating environment abnormality has occurred when at least one of whether the driving state information of the cooling device indicates an operating abnormality of the cooling device or whether the internal temperature information of the portable housing exceeds the limit temperature is established.

[0010] In addition, the wireless communication unit of the present invention can be provided with a rechargeable battery that supplies a battery voltage to the power module. The operating environment information acquisition unit can be configured to acquire the operating environment information further including battery state information indicating the charging state and operating state of the rechargeable battery. The operating environment abnormality determination unit can be configured to determine that an operating environment abnormality has occurred, for example, when the remaining battery level reflected in the battery state information is less than the threshold value. Furthermore, the power module can be provided with an external power supply voltage receiving unit that receives an external power supply voltage. In this case, the operating environment information acquisition unit acquires the operating environment information further including the power reception state information of the external power supply voltage receiving unit, and the operating environment abnormality determination unit determines that an operating environment abnormality has occurred when the remaining battery level reflected in the battery state information is less than the threshold value in a state where the power reception state information indicates that the external power supply voltage is not being received.

[0011] When it is determined by the operating environment abnormality determination unit that an operating environment abnormality has occurred after the startup of the base station function program and the EPC function program in the communication main body unit, the overall control module commands the communication main body unit to execute the close processing of the base station function program stored in the base station function program storage unit and the EPC function program stored in the EPC function program storage unit, and then can be configured to include an in-operation abnormality countermeasure processing unit that performs a power-off process of the communication main body unit.

[0012] The wireless communication unit of the present invention can be provided with a plurality of operating environment information acquisition nodes including an internal temperature information acquisition node that acquires internal temperature information of the portable housing. The overall control module includes a first network interface through which the base station computer and the EPC computer of the communication main body are connected via a first network, and a second network interface through which a plurality of operating environment information acquisition nodes are connected via a second network. The operating environment information acquisition unit communicates and acquires operating environment information from the operating environment information acquisition nodes via the second network interface, and the main body startup command transmission unit can be configured to transmit a main body startup command to the communication main body via the first network interface.

[0013] The second network connects a plurality of operating environment information acquisition nodes as slave nodes to a master node included in the second network interface. The operating environment information acquisition unit includes an acquisition target information request destination notification unit that notifies the master node of the request destination of the acquisition target information. The master node sends an information request command to the second network in a form that designates the slave node as the request destination. When the node corresponding to the designated address among the slave nodes acquires the information request command, the acquisition target information indicated by the information request command can be transmitted to the master node via the second network. Specifically, the first network is, for example, a local area network (LAN), and the second network is an I 2 C network.

[0014] Further, a module support plate is provided inside the portable housing. When one main surface of the module support plate is defined as a module mounting surface and the module support plate is horizontally arranged such that the module mounting surface faces upward, when the direction vertically rising from the module mounting surface is defined as the vertical direction, in the first direction defined along the module mounting surface, an air flow inlet is formed in the side wall portion on the first end side in the first direction of the portable housing, while an air flow outlet is formed in the side wall portion on the second end side. A cooling fan forming a cooling device is attached to the air flow inlet. By the operation of the cooling fan, outside air is taken in from the air flow inlet, and the outside air circulates through the inside of the portable housing in the first direction as cooling air and is then discharged from the air flow outlet. On the module mounting surface of the module support plate, a wireless drive system module group including a radio base station module and a power supply module is arranged on the side closer to the air flow inlet in the air flow direction of the cooling air, and a control system module group including an EPC module and an overall control module is arranged on the side closer to the air flow outlet. As temperature sensors, a first temperature sensor can be arranged within the occupied space of the wireless drive system module group, and a second temperature sensor can be arranged within the occupied space of the control system module group, respectively.

Effect of the Invention

[0015] The wireless communication unit of the present invention integrates a communication main body including a radio base station module and an EPC module with a portable housing. When receiving an input of a main startup signal, the base station function program and the EPC function program are started up collectively, and communication control is initiated. On the other hand, a general control module is provided separately from the radio base station module and the EPC module. The general control module acquires operation environment information including the internal temperature information of the portable housing, and determines based on this whether an abnormality has occurred in the operation environment of the communication main body. When an operation environment abnormality has occurred, a main body startup command is not transmitted, and the startup process of the base station function program and the EPC function program of the communication main body is not executed. Thereby, even when an abnormality occurs in the operation environment of the communication main body, such as when the radio base station module and the EPC module are simultaneously exposed to high temperatures in the portable housing, the risk that the radio base station and the EPC malfunction or operate as a radio wave interference source for other radio systems is less likely to occur. Also, when an abnormality occurs, since the startup of the base station function program and the EPC function program themselves is blocked, it is possible to prevent the destruction of software data due to a program runaway or the like.

Brief Description of the Drawings

[0016]

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Embodiments for Carrying Out the Invention

[0017] Hereinafter, embodiments for carrying out the present invention will be described based on the accompanying drawings. FIG. 1 is a schematic diagram conceptually showing an example of the wireless communication unit of the present invention. The wireless communication unit 1 is configured to perform wireless communication with a plurality of UEs (mobile terminal devices) 5 in accordance with a communication protocol stack of a system defined by 3GPP (in this embodiment, LTE, but other systems such as WiMAX may also be used). The wireless communication unit 1 is installed and used in wireless non-infrastructure areas where EPCs and radio base stations are not infrastructurally prepared, such as at sea, in sparse areas, or areas where the communication function has been lost due to disasters or the like. The wireless communication unit 1 can obtain a power supply voltage from a battery, a self-power generation device, etc. as described later, and can easily construct a self-owned wireless network that does not depend on the public network. Each UE 5 is connected to the wireless communication unit 1 by a radio bearer 57.

[0018] The wireless communication unit 1 includes a radio base station module (radio base station or eNodeB (evolved NodeB)) 4 and an EPC (Evolved Packet Core) module 3 that is wired-connected to the radio base station module 4 and functions as a higher-level network control unit for the radio base station module 4. The EPC module 3 is located at a node point with the MME (Mobility Management Entity) 2 that serves as a gateway on the control plane side, the S-GW (Serving Gateway) 6 that serves as a gateway on the user plane side, and an upstream network element (here, the router 8), and has a P-GW (PDN (Packet Data Network) Gateway) 7 that performs IP address management toward the upstream network element side. The router 8 is connected to an application server (not shown) via an external network 60 (e.g., the Internet) wirelessly (e.g., satellite communication) or by wire, and functions to acquire content data such as terminal applications and videos (images). On the control plane side, the radio base station module (eNodeB) 4 is connected to the MME 2 via the S1-MME interface. Also, on the user plane side, the radio base station module 4 is connected to the S-GW 6 via the S1-U interface. The S-GW 6 is connected to the P-GW 7 via the S5 interface.

[0019] Figure 2 is a block diagram showing an example of the electrical configuration of the wireless communication unit 1. The wireless communication unit 1 includes a portable housing 23, inside of which the EPC module 3, the radio base station module 4, the overall control module 9, and the power supply module 22 are housed together with peripheral components. Also, cooling fans 14A, 14B (cooling devices) for cooling the inside are provided in the portable housing 23. The EPC module 3 and the radio base station module 4 constitute the communication main body part.

[0020] The EPC module 3 is mainly composed of the EPC computer 300. The EPC computer 300 consists of a CPU 301, a RAM 302 serving as a program execution area, a mask ROM 303 (which stores firmware for microcomputer hardware peripherals that do not require permanent rewriting; the same applies hereinafter), and an internal bus 306 that interconnects them. Connected to the internal bus 306 as an EPC function program storage unit is a non-volatile memory device whose stored content can be rewritten, such as a flash memory 305. Installed here are an EPC communication firmware 305a (EPC function program) including an LTE protocol stack for EPC, and, using the LTE protocol stack as a platform, an MME entity 305b, an S-GW entity 305c, and a P-GW entity 305d that virtually implement the functions of the MME 2, S-GW 6, and P-GW 7 in FIG. 2, and programs for a software router 305e that realizes the function of the router 8 in FIG. 1. Also connected to the internal bus 306 is an Ethernet interface 304 which is a LAN interface. In the above configuration, the MME 2, S-GW 6, and P-GW 7 in FIG. 2 are configured as virtual function entities whose functions are realized software-wise on computer hardware, but they may also be configured with independent hardware logics.

[0021] The radio base station module 4 is mainly composed of the radio base station computer 400. The radio base station computer 400 consists of a CPU 401, a RAM 402 serving as a program execution area, a mask ROM 403, and an internal bus 406 that interconnects them. Connected to the internal bus 406 as a base station function program storage unit is a flash memory 405. Stored here is a base station communication firmware 405a (base station function program) including an LTE protocol stack for the radio base station. Also connected to the internal bus 406 are a radio communication unit 412 for wirelessly connecting to the UE 5 by constructing a radio bearer, and an Ethernet interface 408.

[0022] The overall control module 9 is mainly composed of an overall control computer 900. The overall control computer 900 consists of a CPU 901, a RAM 902 serving as a program execution area, a mask ROM 903, and an internal bus 906 that interconnects them. A flash memory 905 is connected to the internal bus 906, and overall control firmware 905a is stored therein. Also, an Ethernet interface 904 (first interface), an input / output section (I / O) 909, and a WiFi module 908 are connected to the internal bus 906. Further, in order to expand the functions of the overall control module 9, a control board 13 that integrates the control signals input to and output from the overall control module 9 is separately provided. On the control board 13, 2 an I

[0023] C (Inter-Integrated Circuit) bus master 907 (second interface, master node) and an extended input / output section (I / O) 910 are mounted, and are respectively connected to the input / output section (I / O) 909 of the overall control module 9. Note that the control board 13 can be regarded as a component of the overall control module in a broad sense.

[0024] The power supply module 22 supplies power voltages to each component such as the EPC module 3, the radio base station module 4, the overall control module 9, the switching hub 11, and the cooling fans 14A and 14B, and receives the original voltage from the external power supply 26 (for example, commercial alternating current: AC100V) and the rechargeable battery 21 (for example, a lithium-ion secondary battery module or a nickel-metal hydride secondary battery module, etc.) via the battery controller 24. In this embodiment, the alternating current voltage of the external power supply 26 is converted into a direct current voltage (DC12V) by the AC / DC converter 25 and supplied to the power supply module 22. The power reception state (received voltage) from the external power supply 26 (AC / DC converter 25) is monitored by the external voltage monitoring unit 16 provided on the substrate of the power supply module 22.

[0025] Also, the battery voltage of the rechargeable battery 21 is converted into a stabilized direct current voltage (DC12V) by the battery controller 24 and supplied to the power supply module 22. Thereby, the wireless communication unit 1 can autonomously procure the drive power voltage from the secondary battery module 21 and can be used without problems even in an installation location where an external power supply voltage such as commercial alternating current is unavailable (for example, a disaster area where there is a power outage). Note that the portable housing 23 is a box-shaped one made of metal or reinforced resin.

[0026] Also, the battery controller 24 is a commercially available I 2A device configured as a C device is used, and a plurality of rechargeable batteries 21 are mounted in parallel and detachably. When the output voltage of the rechargeable battery 21 drops due to discharge, the secondary battery module 21 can be removed from the battery controller 24, and another charged rechargeable battery 21 can be attached. At this time, each rechargeable battery 21 can be hot-swapped on the battery controller 24. Also, when the power supply module 22 is receiving power from the external power supply 26, the battery controller 24 can charge the secondary battery module 21 with the external power supply voltage. Further, when the power supply module 22 is receiving power from the external power supply 26 and the power reception is interrupted due to a power outage, by switching to power reception from the secondary battery module 21, the wireless communication unit 1 can continue to operate without interruption (described later).

[0027] In order to correspond to a plurality of DC power supply voltages required by each component, the power supply module 22 is equipped with a plurality of stabilized DC power supply circuits (not shown) having different output voltages. FIG. 3 shows the power supply form to each component in the wireless communication unit 1. The circles on the frame lines of each component indicate power supply terminals, and the broken lines connecting them indicate power supply lines. In this embodiment, DC3.5V is supplied to the EPC module 3 of only the EPC computer 300, which is the main hardware, and DC5V is supplied to the switching hub 11 having a switching drive unit, respectively, through the backplane 12. Also, DC3.5V is input to the wireless base station module 4 having the wireless communication unit 412, and DC5V is input to the overall control module 9 having the WiFi module 908. Also, in FIG. 3, the squares on the frame lines of each component indicate LAN ports, and the solid lines (single) connecting them indicate the Ethernet bus (or LAN cable) 32 forming the first network. Further, the diamonds on the frame lines of each component indicate I 2 C ports, and the solid lines (double) connecting them indicate the I 2The C bus 52 is shown. Also, the ● mark indicates an external connection port (and the corresponding terminal on the component). Specifically, as the external port group 31A of the software router 8, an APP port (application server connection port), an MNT port (port for connecting to the operation management LAN of the wireless communication unit 1), and a BH port (backhaul port for connecting to the Internet or the like) are provided. Also, the external port group 31B of the radio base station module 4 is for connecting the antenna 413 to the radio communication unit 412 in FIG. 2. The TRx1 port is a connection port for a transceiver shared antenna, and the Rx2 port is a connection port for a receiving antenna that forms a receiving diversity with the transceiver shared antenna (in FIG. 2, the antenna 413 composed of these multiple antenna groups is shown in a simplified form as one antenna).

[0028] Next, as shown in FIG. 2, on the portable housing 23, a power switch 65, a control switch 66, and a plurality of LEDs 60 forming an operating environment abnormality notification unit are provided. The power switch 65 and the control switch 66 are connected to the extended input / output unit 910 on the control board 13. Also, the plurality of LEDs 60 are connected to an LED driver 17 configured as a C device via a current adjustment resistor 62 (see FIG. 3). As shown in FIG. 3, the signal lines of the power switch 65 and the control switch 66 are pulled up by the signal power supply voltage Vcc via a resistor 67, and a binary switch signal reflecting the switch open / closed state is input to the extended input / output unit 910. Among these, the switch signal input by operating the power switch 65 forms a main startup signal and is used as a command signal for starting up the EPC communication firmware 305a and the base station communication firmware 405a all at once (the extended input / output unit 910 functions as a main startup signal reception unit). Also, the switch signal input by operating the control switch 66 is used for system reset and other control inputs. 2

[0029] On one hand, the wireless base station module 4 is provided with a first temperature sensor (hereinafter, also referred to as "temperature sensor 1" in the drawings) 15A, and the control board 13 described later is provided with a second temperature sensor (hereinafter, also referred to as "temperature sensor 2" in the drawings) 15B. Hereinafter, an example of the internal structure of the wireless communication unit 1 will be described together with the arrangement forms of each module, temperature sensors 15A, 15B and cooling fans 14A, 14B. FIG. 21 is a side view showing the internal structure of the wireless communication unit 1, and FIG. 22 is a plan view. In the longitudinal direction (the first direction: the left-right direction in the drawing) of the portable housing 23, an air flow inlet 23y is formed in the side wall portion on the first end side, and the cooling fans 14A, 14B are attached thereto. Specifically, as shown in FIG. 22, a pair of cooling fans 14A, 14B are arranged at a predetermined interval in the width direction (the second direction: the up-down direction in the drawing) of the portable housing 23. On the other hand, as shown in FIG. 22, an air flow outlet 23w is formed in the side wall portion on the second end side in the longitudinal direction of the portable housing 23, and is covered with an air filter 23f. By the operation of the cooling fans 14A, 14B, outside air FA is taken in from the air flow inlet 23y, circulates longitudinally inside the portable housing 23 as cooling air, and then is discharged from the air flow outlet 23w.

[0030] A bottom support plate 233 is arranged at the bottom of the portable housing 23. A duplexer 404 is attached to the upper surface of the bottom support plate 233. As shown in FIG. 2, the duplexer 404 is provided directly below the transmit-receive common antenna included in the antenna 413 of the wireless communication unit 412, and is a component for electrically separating the antenna transmission path and the antenna reception path to prevent strong transmission waves from flowing into the reception side. In the case of a wireless base station, since the transmission wave output is as high as, for example, around 100 to 250 W, it includes a large low-pass filter component composed of a cavity filter or the like. The duplexer 404 has large spatial dimensions but a small heat generation amount. Therefore, as shown in FIG. 21, it can be said that it is desirable to arrange it on the upper surface of the bottom of the portable housing 23.

[0031] Next, an intermediate support plate 234 is disposed above the bottom support plate 233 as a module support plate. The bottom support plate 233 and the intermediate support plate 234 are connected to each other by a plurality of support columns 235 disposed at the outer peripheral edge of the plate surface. The upper surface of the intermediate support plate 234 forms a module mounting surface. In the flow direction (longitudinal direction, first direction) of the cooling air inside the portable housing 23, a wireless drive system module group including the wireless base station module 4 and the power supply module 22 is located on the upstream side (the side closer to the air flow inlet 23y), and a control system module group including the EPC module 3, the overall control module 9, and the control board 13 is located on the downstream side (the side closer to the air flow outlet 23w). By disposing the wireless drive system module group with a large heat generation amount on the windward side of the cooling air, the cooling of the wireless drive system module group can be effectively performed, and by separating the control system module group on the leeward side thereof, an excessive temperature rise of the control system module group can be prevented. And, the aforementioned temperature sensors 15A and 15B are respectively disposed such that the first temperature sensor 15A is within the occupied space of the wireless drive system module group and the second temperature sensor 15B is within the occupied space of the control system module group. In the following description, for convenience, the direction that vertically rises from the upper surface (module mounting surface) when the intermediate support plate 234 (module support plate) is horizontally disposed is defined as the vertical direction. However, the orientation of the module mounting surface in the portable housing 23 is not limited to the horizontal direction. For example, the module mounting surface may be inclined or orthogonal to the horizontal plane.

[0032] By arranging the first temperature sensor 15A in the occupied space of the wireless drive system module group with a large amount of heat generation during operation to detect the temperature, it is possible to grasp the behavior as a heat source of the wireless drive system module group within the portable housing 23. On the other hand, by arranging the second temperature sensor 15B in the occupied space of the control system module group with a small amount of heat generation during operation to detect the temperature, it is possible to accurately grasp whether the cooling effect on the control system module group is sufficiently achieved even by the cooling air after passing through the wireless drive system module group. Further, by combining the temperature detection near the heat source (wireless drive system module group) as described above and the temperature detection at a position away from the heat source downstream in the air blowing direction, it may be easier to identify the cause when a temperature abnormality occurs within the portable housing 23. For example, when the cooling fans 14A and 14B stop due to an abnormality, specific behaviors such as the detected temperature of the first temperature sensor 15A close to the heat source immediately starting to rise and then, with a slight delay, the detected temperature of the second temperature sensor 15B rising occur. Also, when an overcurrent due to a short circuit or the like occurs in the control system module group, the detected temperature of the first temperature sensor 15A does not change much, while the detected temperature of the second temperature sensor 15B that detects the heat generation within the control system module group starts to rise rapidly. By referring to the differences in the temperature detection behaviors of the two temperature sensors 15A and 15B as described above, it is possible to easily obtain information contributing to the identification of the cause of the temperature abnormality.

[0033] The radio base station module 4 and the power supply module 22 are arranged adjacent to each other vertically such that the main surfaces of the substrates 4s and 22s on which components are mounted overlap each other in plan view with respect to the module mounting surface (upper surface) of the intermediate support plate 234, and a cooling air flow gap 231 is formed between the two. The cooling fans 14A and 14B are positioned with respect to the portable housing 23 such that a part of the cooling air can be blown into the cooling air flow gap 231. By arranging the radio base station module 4 and the power supply module 22, which form a radio drive system module group with a large heat generation amount, adjacent to each other as described above, the exclusive area of the radio drive system module group with respect to the module mounting surface in the portable housing 23 can be reduced, contributing to the compactification of the wireless communication unit 1. And, despite the radio base station module 4 and the power supply module 22 with a large heat generation amount being arranged adjacent to each other, the heat generated by both can be more effectively discharged by sending cooling air to the cooling air flow gap 231 formed between the two, and the temperature of the radio drive system module group can be more effectively suppressed from rising excessively.

[0034] As shown in FIG. 21, the power supply module 22 has a substrate 22s on which components (including a coil 22i, a capacitor 22c, a DC / DC conversion IC 22d, etc.) are mounted. Similarly, the radio base station module 4 also has a plurality of substrates 4s on which components (including a power semiconductor element 4a such as a power amplifier element) are mounted. These substrates 22s and 4s are connected to each other vertically by a support portion 232.

[0035] Also, with respect to the module mounting surface of the intermediate support plate 234, the power module 22 is disposed on the lower side and the radio base station module 4 is disposed on the upper side. The cooling air from the cooling fans 14A and 14B is divided into a first air flow CFA directed toward the cooling air flow gap 231 and a second air flow CFB directed in the normal direction of the substrate 4s of the radio base station module 4 and toward the side opposite to the side facing the cooling air flow gap 231 (i.e., the upper surface side of the radio base station module 4 in FIG. 21). Thereby, with respect to the radio base station module 4 having particularly large heat generation, the cooling air can be circulated vertically, enabling more efficient cooling. When the transmission output of the radio base station module 4 is, for example, 100 to 250 W, it is preferable to ensure a wind speed of the cooling air by the cooling fans 14A and 14B of about 1 to 2 m / s.

[0036] The power semiconductor element 4a of the radio base station module 4 is mounted on the upper surface side of the radio base station module 4, i.e., on the uppermost one of the plurality of substrates 4s, and a heat sink plate 4h made of a metal such as aluminum is provided in close contact with the upper surface of the power semiconductor element 4a. A plurality of metal heat dissipation fins 4f are integrally formed on the upper surface of the heat sink plate 4h in a form that stands vertically from the upper surface of the heat sink plate 4h. As shown in FIG. 22, the longitudinal direction of the heat dissipation fins 4f is arranged to coincide with the longitudinal direction of the portable housing 23 (the air blowing direction of the cooling air), and the gap between adjacent heat dissipation fins 4f and 4f forms a passage 4k for the cooling air (see FIG. 24). Thereby, the cooling efficiency of the power semiconductor element 4a by the second air flow CFB in FIG. 21 can be significantly improved.

[0037] As shown in FIG. 21, the cooling fans 14A and 14B are attached to the portable housing 23 such that the extension of the rotation axis J of the fan rotating blades 14p passes through the intermediate position in the height direction on the side surface of the wireless drive system module group. Each of the cooling fans 14A and 14B has a base portion 14b in which a fan drive motor or the like is housed, and a main body portion 14m integrated with the base portion 14b and housing the fan rotating blades 14p. The main body portion 14m is attached to the base portion 14b so as to incline upward in such a manner that the extension of the rotation axis J of the fan rotating blades 14p enters inside the cooling air flow gap 231. Thereby, the cooling air of the cooling fans 14A and 14B is efficiently blown into the cooling air flow gap 231 from the obliquely lower side for the first air flow CFA, while a second air flow CFB can also be guided to the upper surface side (the side where the heat sink plate 4h and the radiation fins 4f are provided) of the wireless base station module 4 far from the module mounting surface at a relatively large flow rate.

[0038] An air flow guide plate 14s for dividing the cooling air into the first air flow CFA and the second air flow CFB is provided on the front side in the air supply direction of the cooling fans 14A and 14B. The air flow guide plate 14s is arranged such that the plate surface is inclined upward with respect to the rotation axis J of the fan rotating blades 14p so that the second air flow CFB is guided to the upper surface side of the wireless drive system module. Thereby, the second air flow CFB is more efficiently guided to the upper surface side of the wireless drive system module group (the upper surface side of the wireless base station module 4 in the example of FIG. 21), and the cooling of the wireless drive system module group can be promoted. As shown in FIG. 24, both ends of the air flow guide plate 14s are integrated with mounting arm portions 14sf, and the mounting arm portions 14sf are fixed to the base portion 14b of the cooling fans 14A and 14B by fastening members 14t such as screws.

[0039] Also, as shown in FIG. 21, a shielding plate 4p is attached to the upper surface side of the heat radiation fins 4f of the radio base station module 4. The shielding plate 4p can also be made of metal. As shown in FIG. 24, by providing this shielding plate 4p, the passage 4k for the cooling air described above is formed in a rectangular cross-section with the upper part blocked by the shielding plate 4p between the adjacent heat radiation fins 4f, 4f. As shown in FIG. 25, the second air flow CFB blown obliquely downward from the entrance of the passage 4k would blow through above the passage 4k if the shielding plate 4p did not exist, and it would be difficult to form the flow of the cooling air along the plate surface of the heat sink plate 4h. However, if the shielding plate 4p is provided, the second air flow CFB is prevented from passing upward, and the flow inside the passage 4k becomes dominant, enabling the second air flow CFB to contact the plate surface of the heat sink plate 4h more efficiently. Further, the edge effect occurs when the second air flow CFB hits the edge on the entrance side of the shielding plate 4p from the obliquely lower side, and as a result of the flow being constricted and accelerated by the Karman vortex generated near the entrance inside the passage 4k, the effect of drawing the air flow into the passage 4k can also be expected due to the decompression effect.

[0040] Returning to FIG. 21, the EPC module 3, the overall control module 9, the switching hub 11, and the control board 13 that form the control system module group are arranged on the downstream side of the radio drive system module group (the radio base station module 4 and the power supply module 22) in the air blowing direction of the cooling air. Among these, the overall control module 9 and the control board 13 are directly attached to the intermediate support plate 234. FIG. 23 shows the mounting layout of each substrate on the upper surface (module mounting surface) of the intermediate support plate 234. When defining the direction orthogonal to the longitudinal direction (air blowing direction, left - right direction in the drawing) of the portable housing 23 within the module mounting surface as the depth direction, the substrate of the overall control module 9 and the control board 13 are assembled adjacent to each other with respect to the intermediate support plate 234 in the depth direction on the downstream side in the air blowing direction of the power supply module 22.

[0041] Further, four columnar substrate support frames 236 are erected on the downstream side in the air blowing direction of these power modules 22. As shown in FIG. 21, the substrates of the EPC module 3 and the substrate of the switching hub 11 are attached to the substrate support frame 236 at the four corner positions in this order from the lower side while forming an air blowing gap.

[0042] Next, the temperature sensors 15A and 15B are attached to the internal temperature monitoring devices 85A and 85B (in FIG. 4 above) that serve as drive state information acquisition nodes, and play a role of acquiring the internal temperature information of the portable housing 23 as the operating environment information of the communication main body part. As shown in FIG. 21, both the temperature sensors 15A and 15B are mounted on the substrates constituting the internal temperature monitoring devices 85A and 85B. Regarding the first temperature sensor 15A, it is attached to the side surface of the wireless base station module 4 together with the substrate of the internal temperature monitoring device 85A. Also, the second temperature sensor 15B is mounted on the substrate 907s of the I 2 C bus master 907 erected on the control board 13 together with the substrate of the internal temperature monitoring device 85B (the substrate 907s shall be regarded as belonging to the control board 13 in a broad sense). Both temperature sensors 15A and 15B are arranged to detect temperature at the side surface positions in the depth direction of the wireless drive system module group and the control system module group.

[0043] On the other hand, fan operation monitoring devices 84A and 84B (in FIG. 4 above: cooling device drive state information acquisition nodes, slave nodes) that serve as drive state information acquisition nodes are incorporated in the cooling fans 14A and 14B, and play a role of monitoring and acquiring, for example, the rotation speed, temperature, and drive current value of the fan as the operating environment information of the communication main body part. Also, the external voltage monitoring unit 16 serves as a drive state information acquisition node and plays a role of monitoring and acquiring the received power voltage from the AC / DC converter 25 of the power module 22 as the operating environment information. Furthermore, the battery controller 24 also serves as a drive state information acquisition node and plays a role of monitoring and acquiring the remaining amount of the battery (BTT), the battery voltage, and the battery temperature as the operating environment information.

[0044] As shown in FIG. 4, the fan operation monitoring devices 84A and 84B, the internal temperature monitoring devices 85A and 85B, the external voltage monitoring unit 16, and the battery controller 24 that form the operating environment information acquisition nodes are I 2 configured as slave nodes of I 2 C communication. On the other hand, the I 2 C bus master 907 on the control board 13 functions as a master node in I 2 C communication. The above slave nodes (operating environment information acquisition nodes) are connected by the I

[0045] C bus 52 and constitute an operating environment information acquisition unit that acquires operating environment information in the form of a detection log from each slave node.

[0045] In this way, by separating the network (the second network) for acquiring the operating environment information from the communication network (the first network) that connects the overall control module 9 and the communication main body (the base station computer 400 and the EPC computer 300), the communication sequence for acquiring the operating environment information can be made independent from the complex communication sequences required for the control of the communication main body itself, and the acquisition of the operating environment information can be performed more simply and smoothly. Further, by providing a master node on the second network interface side and transmitting an information request command from the master node to the slave node in the form of specifying the address of the slave node that becomes the operating environment information acquisition node, and configuring the slave node to transmit the operating environment information to the master node in response thereto, the complication of the sequence when acquiring the operating environment information from a plurality of devices does not occur, and more efficient collection of the operating environment information can be achieved. As such a second network, particularly when using the I 2 C network, even for relatively large-sized operating environment information, it is possible to easily control the transmission and reception by serial communication, and no complex input / output port control processing is required.

[0046] Hereinafter, the outline of I 2 C communication will be described. In I 2 C communication, the master node (I 2The C bus master 907) and slave nodes are clearly distinguished, and the master node takes the lead in control. The I that connects the master node and the slave node 2 The C bus 52 consists of two lines, a clock line SCL and a data line SDA. Based on the clock signal transmitted by the master node via the clock line SCL, a binary data signal is serially transferred on the data line SDA. Each slave node has a unique address, and when information is transmitted, an acknowledgment signal (ACK) is always returned from the destination node to the source node.

[0047] Below Figure 4 2 Shows the structure of the data frame 1100 of C communication. The data frame 1100 includes the following fields. · Address field 1101: The address of the slave node that is the destination of data transfer is transferred in 7 bits or 10 bits. The information transfer direction of the address field 1101 is always master (M) → slave (S). All slave nodes receive the address based on the clock at this time, and only the slave node whose address matches its own will continue the subsequent transmission and reception. The fan operation monitoring devices 84A, 84B, the internal temperature monitoring devices 85A, 85B, the external voltage monitoring unit 16, and the battery controller 24 that form the operating environment information acquisition nodes are assigned different addresses, and the addresses also function as information specifying the types of devices for which the operating environment information is to be acquired. · R / W field 1102: 1-bit R / W mode information is transferred. When the R / W mode information is "0", it is information input from the slave (S) to the master (M) (Read mode: reading information from the slave node), and when the R / W mode information is "1", it indicates information output from the master (M) to the slave (S) (Write mode: writing information to the slave node). The transfer direction is master (M) → slave (S). · ACK1103: An acknowledgment signal for the transmission and reception of the R / W field, and the transfer direction is master (M) ← slave (S) in the Read mode and master (M) → slave (S) in the Write mode. · Data Field 1104: Information (data or command) of 1 byte (8 bits) is transferred. The transfer direction is from the master (M) to the slave (S) in the Read mode, and from the master (M) to the slave (S) in the Write mode. When the content is a command, for each type of device forming the slave node, the type of operating environment information to be acquired (for example, in the case of the battery controller 24, remaining battery level, battery voltage, temperature, etc.) is specified by a command uniquely associated with that type. · ACK1105: An acknowledgment signal for the transmission and reception of the data field. The transfer direction is from the master (M) to the slave (S) in the Read mode, and from the master (M) to the slave (S) in the Write mode. In addition, when the total size of the information to be transferred is larger than the size of the data field 1104, the information transfer is performed by dividing it into a plurality of data fields 1104.

[0048] Figure 11 shows the processing flow of the master node in the Read mode. At S151, the I 2 C bus (SCL and SAD) is set to the information transfer start state (Start Condition). At S152, the address of the slave node that is the information request destination is output, and "0" is output as the R / W mode information. If there is an ACK input at S153, it proceeds to S154, and data (or command) from the slave node is input (if there is no ACK, it proceeds to the error processing at S159). If the data (or command) is normally input at S155, it proceeds to S156, and an ACK is returned to the slave node (if it cannot be input normally, it proceeds to the error processing at S159). If all data has not been input at S157, it returns to S154 and repeats the following processing. On the other hand, if all data has been input at S157, it proceeds to S158, and the I 2 C bus is set to the information transfer end state (Stop Condition) and ends.

[0049] Figure 12 shows the processing flow of the master node in the Write mode. At S101, the I 2Use the C bus as the Start Condition, output the address of the slave node that will be the information transfer destination at S102, and output "1" as the R / W mode information. If there is an ACK input at S103, proceed to S104 and output data (or a command) (if there is no ACK, proceed to the error handling at S108). If an ACK from the slave node can be received at S105, proceed to S106 and check whether the output of all data has ended. If it has not ended, return to S104 and repeat the following process. On the other hand, if the output of all data is completed at S106, proceed to S107, I 2 Set the C bus to the information transfer end state (Stop Condition) and end.

[0050] Hereinafter, an outline of the communication method according to the 3GPP specification will be described. FIG. 5 is a schematic diagram showing the structure of an IP packet used for data transmission between the UE5 and the wireless communication unit 1. The IP packet 1300 consists of an IP header 1301 and a payload 1302. In the IP header 1301, a PDU identification number, a data source address 1301a, a destination address 1301b, etc. are written. Also, a ToS (Type of Service) field 1301c is formed in the IP header 1301. The ToS field 1301c defines the packet transfer priority and the type of communication.

[0051] Figures 6 and 7 show the radio protocol stack of the 3GPP specifications that form the basis of the EPC communication firmware 305a or the base station communication firmware 405a. Figure 6 shows the protocol stack of the user plane, and Figure 7 shows the protocol stack of the control plane. The radio protocol stack is divided into layers 1 to 3 of the OSI reference model, and layer 1 is the PHY (Physical) layer. Layer 2 includes the MAC (Medium Access Control) layer, the RLC (Radio Link Control) layer, and the PDCP (Packet Data Convergence Protocol) layer. Layer 3 includes the RRC (Radio Resource Control) layer and the NAS (Non-Access Stratum) layer.

[0052] The roles of each layer are as follows. · PHY layer: Performs encoding / decoding, modulation / demodulation, antenna mapping / demapping, and resource mapping / demapping. · MAC layer: Performs data priority control, retransmission control processing by HARQ, and random access procedures, etc. Between the MAC layer of the UE5 and the MAC layer of the radio base station module 4, data and control signals are transmitted via the transport channel. The MAC layer of the radio base station module 4 includes a scheduler that determines the transport format of the uplink and downlink (transport block size, modulation / coding scheme (MCS)) and the resource blocks allocated to the UE5.

[0053] · RLC layer: Transmits data to the RLC layer on the receiving side by utilizing the functions of the MAC layer and the PHY layer. Between the RLC layer of the UE5 and the RLC layer of the radio base station module 4, data and control signals are transmitted via the logical channel. · PDCP layer: Performs header compression / expansion of the PDU and encryption / decryption. · RRC layer: It is defined only in the control plane that handles control signals. Between the RRC layer of UE5 and the RRC layer of the radio base station module 4, messages (RRC messages) for various settings are transmitted. The RRC layer controls the logical channel, transport channel, and physical channel in response to the establishment, re-establishment, and release of radio bearers. When there is a connection (RRC connection) between the RRC of UE5 and the RRC of the radio base station module 4, UE5 enters the RRC connected mode; otherwise, it enters the RRC idle mode.

[0054] The above layers are used in both the control plane and the user plane. On the other hand, only in the control plane, a NAS layer for performing session management, mobility management, etc., which is higher than the RRC layer, is provided for UE5 and MME2. Also, a GTP-U (GPRS (General Packet Radio Service) Tunneling Protocol for User Plane) layer is provided in the user data transmission interface between the EPC module 3 side of the radio base station module 4. The GTP-U layer is for identifying the destination UE5 and the radio bearer to be used.

[0055] Next, FIG. 8 shows the downlink channel mapping. Here, it shows the mapping relationship among the logical channel (Downlink Logical Channel), transport channel (Downlink Transport Channel), and physical channel (Downlink Physical Channel). The following will be described in order. · DTCH (Dedicated Traffic Channel) is an individual logical channel for data transmission. DTCH is mapped to the transport channel DLSCH (Downlink Shared Channel). ·DCCH (Dedicated Control Channel): A logical channel for transmitting individual control information between the UE5 and the network. DCCH is used when the UE5 has an RRC connection with the radio base station module 4. DCCH is mapped to the DLSCH. ·CCCH (Common Control Channel): A logical channel for transmitting control information between the UE5 and the radio base station module 4. CCCH is used when the UE5 does not have an RRC connection with the radio base station module 4. CCCH is mapped to the DLSCH. ·BCCH (Broadcast Control Channel): A logical channel for system information distribution. BCCH is mapped to the BCH (Broadcast Channel) or DLSCH, which are transport channels. ·PCCH (Paging Control Channel): A logical channel for paging information and notifying system information changes. PCCH is mapped to the PCH (Paging Channel), which is a transport channel.

[0056] Also, the mapping relationship between the transport channel and the physical channel is as follows. ·DLSCH and PCH: Are mapped to the PDSCH (Physical Downlink Shared Channel). DLSCH supports HARQ, link adaptation, and dynamic resource allocation. ·BCH: Is mapped to the PBCH (Physical Broadcast Channel).

[0057] Figure 9 shows the channel mapping of the uplink. Similar to Figure 8, it shows the mapping relationships among the logical channel (Downlink Logical Channel), transport channel (Downlink Transport Channel), and physical channel (Downlink Physical Channel). The following will be described in sequence. · CCCH (Common Control Channel): A logical channel used to transmit control information between the UE5 and the EPC module 3, and is used by the UE5 that does not have a radio resource control (RRC) connection with the EPC module 3. · DCCH (Dedicated Control Channel): A one-to-one (point-to-point) bidirectional logical channel, which is a channel used to transmit individual control information between the UE5 and the EPC module 3. The dedicated control channel DCCH is used by the UE5 that has an RRC connection. · DTCH (Dedicated Traffic Channel): A one-to-one bidirectional logical channel, which is a channel dedicated to a specific UE and is used for the transfer of user information.

[0058] · ULSCH (Uplink Shared Channel): A transport channel that supports hybrid automatic repeat request (HARQ), dynamic adaptive radio link control, and discontinuous transmission (DTX). · RACH (Random Access Channel): A transport channel on which limited control information is transmitted.

[0059] · PUCCH (Physical Uplink Control Channel): A physical channel used to notify the radio base station module 4 of response information (ACK (Acknowledge) / NACK (Negative Acknowledge)) for downlink data, downlink radio quality information (CQI: Channel Quality Indicator), and transmission requests for uplink data (Scheduling Request: SR). · PUSCH (Physical Uplink Shared Channel): A physical channel used to transmit uplink data. · PRACH (Physical Random Access Channel): A physical channel mainly used for transmitting a random access preamble to obtain transmission timing information (transmission timing command) from the UE 5 to the radio base station module 4. The random access preamble transmission is performed during the random access procedure.

[0060] As shown in Figure 9, in the uplink, the mapping between the transport channel and the physical channel is performed as follows. The uplink shared channel ULSCH is mapped to the physical uplink shared channel PUSCH. The random access channel RACH is mapped to the physical random access channel PRACH. The physical uplink control channel PUCCH is used alone as a physical channel. Also, the common control channel CCCH, dedicated control channel DCCH, and dedicated traffic channel DTCH are mapped to the uplink shared channel ULSCH.

[0061] In the downlink of the LTE system, the UE 5 wirelessly connects to the radio base station module 4 by means of OFDM (Orthogonal Frequency-Division Multiplexing) access (OFDMA). The OFDMA method is characterized as a two-dimensional multiplex access method that combines frequency-division multiplexing and time-division multiplexing. Specifically, sub-carriers on the orthogonal frequency axis and time axis are divided and allocated to the UE 5, and sub-carriers orthogonal on the frequency axis are divided so that the signals of each sub-carrier become zero (zero point). By dividing the sub-carriers and allocating them on the frequency axis, even if a certain sub-carrier is affected by fading, another sub-carrier that is not affected can be selected. Therefore, the user can use a better sub-carrier according to the radio environment, and the advantage of maintaining the radio quality occurs.

[0062] And in the OFDMA method, a resource block (hereinafter also referred to as RB), which is defined on a virtual plane spanned by the frequency axis and the time axis, is adopted as the radio resource. As shown in FIG. 10, the RB is defined as a block that divides the above plane into a matrix at 180 kHz / 0.5 msec. Each resource block RB includes 12 adjacent sub-carriers at 15 kHz intervals on the frequency axis and one slot (7 symbols) of the frame on the time axis. These RBs are allocated to the UE 5 in pairs of two adjacent ones (1 msec) on the time axis. On the other hand, in the uplink of the LTE system, a resource block RB with a similar concept is used as the radio resource, except that SC-FDM (Single Career Frequency-Division Multiplexing) access (SC-FDMA) is adopted. In OFDMA, one resource block is divided into 12 sub-carriers (bandwidth: 15 kHz) on the frequency axis, while SC-FDMA is a single-carrier method in which no division into sub-carriers is made.

[0063] In the wireless communication unit 1 configured as described above, the overall control module 9 performs the following functional operations by executing the overall control firmware 905a. · Based on the operating environment information acquired by the operating environment information acquisition unit (I 2 C bus master 907), it determines whether a predetermined operating environment abnormality has occurred (operating environment abnormality determination unit). · Only when it is determined that no operating environment abnormality has occurred, it sends a main unit startup command to the communication main unit (main unit startup command transmission unit). · When an operating environment abnormality has occurred, it performs an operating environment abnormality notification output (operating environment abnormality notification unit). · After the base station function program and the EPC function program in the communication main unit are started, when it is determined by the operating environment abnormality determination unit that an operating environment abnormality has occurred, it commands the communication main unit to execute the close processing of the base station function program stored in the base station function program storage unit and the EPC function program (EPC communication firmware 305a) stored in the EPC function program storage unit (flash memory 305), and then performs the power-off processing of the communication main unit (abnormality handling during operation processing unit).

[0064] The LED 60 in FIG. 2 has the function of the operating environment abnormality notification unit of the present invention and includes, for example, those as shown in FIG. 19. · Power LED 60A: Indicates the operation state of the power switch 65. For example, when the power module 22 is in the power reception state and the power switch 65 is turned on, it lights up, and when it is turned off, it goes out. · Operating LED 60B: Notifies whether the communication main unit (EPC module 3 and wireless base station module 4) has received power and started operating (whether the EPC communication firmware 305a and the base station communication firmware 405a have been started and executed). For example, it lights up when starting up and operating, and goes out otherwise. · Fan LED 60C: Lights up, for example, when there is an abnormality in the cooling fans 14A, 14B, and goes out otherwise. · Temperature LED 60D: Lights up, for example, when there is an abnormality in the detected temperature of the temperature sensors 15A, 15B, and goes out otherwise. · Battery LED 60E: For example, it lights up when normal power supply from the battery 21 becomes difficult, such as when the remaining amount of the rechargeable battery 21 falls below the threshold, and goes off otherwise. · External power supply LED 60F: Lights up when there is an input from the external power supply 26, and goes off otherwise.

[0065] Hereinafter, the details of the function realization process by the overall control firmware 905a will be described using a flowchart. In FIG. 2, when the user presses the power switch 65 in FIG. 2 in the power-off state, a main startup signal is input to the input / output unit 909 of the overall control computer 900. FIG. 13 shows the processing flow of the startup sequence when starting the operation of the wireless communication unit 1. When the main startup signal is detected in S201, it is determined that the power is on, and in S202, the overall control computer 900 (overall control firmware 905a) is started up. In S203, I 2 The I2C bus master 907 is notified of the power-on. I 2 The I2C bus master 907 I 2 sends a lighting instruction command for the power LED 60A to the LED driver 17 by I2C communication. Receiving this, the LED driver 17 lights up the power LED 60A at T203.

[0066] Next, in S204, the I2C bus master 907 is commanded to collect the detection log from the battery controller 24. I 2 The I2C bus master 907 I 2 sends a detection log collection command to the battery controller 24 by I2C communication. Receiving this, the battery controller 24 transmits the detection log (operating environment information). In S205, I 2 the I2C bus master 907 receives the detection log from the battery controller 24. 2

[0067] Similarly, in S206, the I2C bus master 907 is commanded to collect the detection logs from the cooling fans 14A, 14B (fan operation monitoring devices 84A, 84B) and the temperature sensors 15A, 15B (internal temperature monitoring devices 85A, 85B). I 2 2Command the C-bus master 907. I 2 The C-bus master 907 is I 2 Send a detection log collection command to the fan operation monitoring devices 84A, 84B and the internal temperature monitoring devices 85A, 85B via C communication. The fan operation monitoring devices 84A, 84B and the internal temperature monitoring devices 85A, 85B each receive this and send a detection log (operating environment information). At S205, I 2 The C-bus master 907 receives the fan operation monitoring devices 84A, 84B and the internal temperature monitoring devices 85A, 85B.

[0068] At S208, analyze the received detection log to analyze the presence or absence of abnormalities. FIG. 14 shows the details thereof. At S2081, analyze the detection logs of the first temperature sensor 15A and the second temperature sensor 15B. In any temperature sensor, it is determined to be "normal" when the detected temperature d is equal to or less than the upper limit value dmax.

[0069] At S2082, analyze the detection logs of the cooling fans 14A, 14B (fan operation monitoring devices 84A, 84B). The conditions for determining that the operation of the cooling fans 14A, 14B is normal are as follows. · The rotation speed u is within the normal range (umin ≦ u ≦ umax: umin is the allowable minimum rotation speed, umax is the allowable maximum rotation speed). The rotation speed can be detected by a rotation sensor such as a rotary encoder (none of which are shown). The rotation speed u being less than umin means that the drive motors of the cooling fans 14A, 14B are not rotating normally due to disconnection or other factors, and there is a risk that the cooling inside the portable housing 23 will not proceed sufficiently and the temperature will rise. On the other hand, the rotation speed u exceeding umax means that an excessive current flows through the drive motors of the cooling fans 14A, 14B due to a short circuit or the like and runs wild, which may lead to a failure. · The temperature Tf is within the normal range (Tf ≦ Tfmax: Tfmax is the allowable maximum temperature). If the temperature Tf exceeds Tfmax, it means that the drive motors of the cooling fans 14A and 14B are abnormally generating heat due to a problem such as overload, which may lead to a failure. Regarding the temperature of the cooling fans 14A and 14B, for example, the temperature on the housing surface of the drive motor can be detected by a temperature sensor (not shown).

[0070] · The current If is within the normal range (Ifmin ≦ If ≦ Ifmax: Ifmin is the allowable minimum current value, and Ifmax is the allowable maximum current value). If the current If is less than Ifmin, it means that the drive motors of the cooling fans 14A and 14B are not rotating normally due to a disconnection or other factors, and there is a risk that the cooling inside the portable housing 23 will not proceed sufficiently and the temperature will rise. On the other hand, if the current If exceeds Ifmax, an excessive current may flow through the drive motors of the cooling fans 14A and 14B due to a short circuit or the like, causing them to run wild and potentially leading to a failure.

[0071] Note that it is possible to omit the detection of either the rotational speed u or the current If, but detecting both can be beneficial for more accurately identifying the cause of an abnormality in the rotation of the cooling fans 14A and 14B. For example, when the current If exceeds Ifmax and the rotational speed u is at umin, although power is being supplied to the drive motor, it is conceivable that the rotation of the fan is being forcibly obstructed by a foreign object or a malfunction in the transmission system, resulting in an overload condition. On the other hand, when the current If is less than Imin and the rotational speed u is less than umin, there is a high possibility of a disconnection or a power supply abnormality. When multiple cooling fans are provided as in this embodiment, it is desirable to perform similar monitoring for each cooling fan.

[0072] Note that in a simpler form, when monitoring whether the cooling fans 14A and 14B are simply operating, the cooling fans 14A and 14B are accompanied by fan operation monitoring devices 84A and 84B. 2There may be cases where it is not necessary to specifically configure it as a C device. For example, as shown in FIG. 20, the drive current values SF of the cooling fans 14A and 14B are converted into voltage signals by, for example, a shunt resistor 14R or the like, and this voltage signal is input to the overall control module 9 as a binary detection signal SF indicating the operation / stop of the cooling fans 14A and 14B (in this embodiment, it is input to the extended input / output unit 910).

[0073] Returning to FIG. 14, in S2083, the detection log of the battery controller 24 is analyzed. The conditions for determining that the operation is normal are as follows. · The remaining battery level Cr is ensured to be equal to or higher than the specified lower limit value Crmin. · The battery voltage Vb is within the normal range (Vbmin ≦ Vb ≦ Vbmax: Vbmin is the allowable minimum battery voltage, Vbmax is the allowable maximum battery voltage). When the battery voltage Vb is less than Vbmin, in addition to the case where the remaining battery level is insufficient, there is a possibility that the battery voltage is not output due to a failure or non - attachment of the battery itself. Also, when the battery voltage exceeds Vbmax, there may be a problem such as a short - circuit from another power source to the battery output circuit. · The battery temperature Tb is equal to or lower than the allowable maximum temperature Tbmax. When the battery temperature Tb exceeds Tbmax, there may be abnormal heat generation due to operations outside the specifications of the rechargeable battery, such as overcharging or over - discharging.

[0074] Then, in S2084, it is confirmed whether all of the above analysis items are normal. If any one of them is abnormal, the process proceeds to S2085 for an abnormality determination. On the other hand, if all analysis items are normal in S2084, the process proceeds to S2086 for a normal determination.

[0075] Returning to FIG. 13, if the abnormality determination is not made in S209 (i.e., in the case of normal determination), in FIG. 2, according to the IP protocol via the switching hub 11 and the Ethernet bus 32 (LAN, the first network), a startup instruction command (main body startup command) for starting up the EPC communication firmware (EPC function program) 305a is transmitted to the EPC computer 300 at S210. The EPC computer 300 receives this and starts the system. When the EPC communication firmware 305a is started up and the startup process is completed normally, a startup completion notification is returned to the overall control module 9. Also, in S211, a startup instruction command (main body startup command) for starting up the base station communication firmware (base station function program) 405a is similarly transmitted to the radio base station computer 400. The radio base station computer 400 receives this and starts the system, starts up the base station communication firmware 405a, and returns a startup completion notification to the overall control module 9. The overall control module 9 confirms the normal startup of the EPC computer 300 and the radio base station computer 400 based on the reception or non-reception of the above startup completion notification in S212. If normal startup can be confirmed, the process proceeds to S213, I 2 Notify the C bus master 907 of normal startup. I 2 Receiving this, the C bus master 907 transmits an LED lighting command indicating "operation" to the LED driver 17. Thereby, the LED driver 17 lights the LED 60B in FIG. 19 (T213).

[0076] On the other hand, in the case of abnormality determination in S209, the processes of S210 and S211 are not executed. That is, a startup instruction command (main body startup command) is not transmitted to the EPC computer 300 and the radio base station computer 400, and the startup process of the EPC communication firmware 305a and the base station communication firmware 405a, that is, the startup process of the communication main body part including the EPC module 3 and the radio base station module 4 is not performed. Instead, the process proceeds to S214, I 2 Notify the C bus master 907 of the occurrence of an abnormality. I 2In response to this, the C bus master 907 sends an LED lighting command indicating "abnormality" to the LED driver 17. Specifically, in the abnormality analysis process of FIG. 14, the type of the device in which the abnormality occurred (temperature sensor, cooling fan, and battery) is notified to the C bus master 907, and the C bus master 907 sends a command to the LED driver 17 to turn on the LED corresponding to the device in which the abnormality occurred. 2 to the C bus master 907, and 2 the C bus master 907 sends a command to the LED driver 17 to turn on the LED corresponding to the device in which the abnormality occurred.

[0077] As a result, for example, when any of the above-mentioned abnormalities (one or more) occur in at least one of the cooling fans 14A and 14B, the LED 60C in FIG. 19 lights up. When an abnormality occurs in the detected temperature of at least one of the temperature sensors 15A and 15B, the LED 60D lights up. Further, when the battery controller 24 detects any of the above-mentioned abnormalities (one or more), the LED 60E in FIG. 19 lights up. When there are a plurality of devices in which abnormalities have occurred, the corresponding LEDs light up simultaneously. On the other hand, when the above-mentioned abnormality occurs, the LED 60B indicating "operation" goes out. Note that the details of the abnormality occurrence situation (abnormality type for each device, occurrence time, etc.) may be configured to be output, for example, to an external PC 911 connected to the overall control module 9 in FIG. 2 via a LAN or to a UE 5 connected via WiFi by a GUI (Graphic User Interface).

[0078] In the method of the above embodiment, when even one abnormality occurs in the operating environment of the communication main body unit, the startup process itself of the communication firmware of the EPC module 3 and the radio base station module 4 is postponed. For example, when the temperature inside the portable housing 23 rises and the detected temperatures of the temperature sensors 15A and 15B become abnormal, the probability that the operations of the EPC computer 300 to the radio base station computer 400 become unstable increases, and the radio base station module 4 and the EPC module 3 may malfunction or operate as a radio wave interference source for other radio systems. However, by grasping the operating environment abnormality including the internal temperature abnormality at the time of starting the wireless communication unit and preventing the startup of the communication main body unit, the above-mentioned problems can be effectively prevented.

[0079] On the other hand, even if the detected temperatures of the temperature sensors 15A and 15B do not indicate an abnormality, if an abnormality such as stoppage occurs in the cooling fans 14A and 14B, the cooling inside the housing will not proceed. Therefore, it will surely lead to a temperature abnormality sooner or later and will inevitably cause the same problem. Thus, as described above, by acquiring both the internal temperature information in the portable housing 23 and the drive state information of the cooling fans (cooling device) and grasping the abnormality at the time of activation of the wireless communication unit 1 to prevent the activation of the communication main body unit, the above problem can be more effectively prevented.

[0080] Although the EPC communication firmware 305a (EPC function program) and the base station communication firmware 405a (base station function program) are stored in a non-volatile memory such as a flash memory whose stored content can be rewritten, during their operation, there may be cases where change processing of some stored content including rewriting of setting parameters is performed. Therefore, the occurrence of a temperature abnormality may lead to the destruction of some software data due to a runaway program or the like. However, by adopting the above method, it is possible to make such destruction of software data less likely to occur. In particular, in the above configuration in which the EPC computer 300 to the wireless base station computer 400 are collectively started by a single push operation of the power switch 65, by mounting a function to detect an abnormality and appropriately stop the startup, the communication firmwares 305a and 405a of both computers can be extremely effectively protected from runaway and destruction.

[0081] Next, in the method of the above embodiment, the state of the rechargeable battery 21 by the battery controller 24 is also acquired as operation environment information, and when an abnormality occurs, the startup process of the communication firmwares of the EPC module 3 and the wireless base station module 4 of the communication main body unit is blocked. Specifically, regardless of the detected temperatures of the temperature sensors 15A and 15B and the presence or absence of an abnormality in the cooling fans 14A and 14B, when a battery abnormality is detected, the startup process of the above communication firmware is blocked.

[0082] In an environment where the wireless communication unit 1 operates on battery power, for example, when normal power supply from the battery becomes impossible due to insufficient remaining battery level or the like, if the EPC communication firmware 305a (EPC function program) and the base station communication firmware 405a (base station function program) attempt to start up, software data may be destroyed due to power-off during program startup. Therefore, by preventing the startup process of the above communication firmware when a battery abnormality is detected, this problem can be effectively prevented.

[0083] In particular, when the received power voltage information (received power state information) indicated by the detection log of the external voltage monitoring unit 16 in FIG. 4 shows a state where the external power supply voltage is not received normally (for example, a state indicating approximately 0 V), since the external power supply voltage cannot be used as a backup, when a battery abnormality is detected, it is particularly desirable to avoid the startup process of the communication firmware of the communication main body unit. In this case, when the external power supply voltage is being received, even when a battery abnormality is detected, it is possible to configure to execute the startup process of the communication firmware of the communication main body unit while using the external power supply voltage.

[0084] On the other hand, even when the external power supply voltage is being received normally, it is also possible to configure to avoid the startup process of the communication firmware of the communication main body unit when a battery abnormality is detected. When the startup process of the communication firmware of the communication main body unit is being executed while using the external power supply voltage, if the reception of the external power supply voltage is interrupted due to a power outage or the like, when a battery abnormality has occurred, it becomes impossible to ensure the power supply voltage for continuing the startup process of the communication firmware, and there is a possibility of causing the destruction of the above-mentioned software data. Therefore, by configuring as described above, it is possible to protect the software data from destruction even in the event of a power outage or the like during the communication firmware startup process.

[0085] Next, FIG. 15 shows the termination sequence of the normal wireless communication unit 1 by the overall control firmware 905a. In S401, when the power switch 65 in FIG. 2 is pressed while the wireless communication unit 1 is in the startup state, the process proceeds to S402 and the termination process is executed. FIG. 16 shows the details of the termination process. According to the IP protocol via the switching hub 11 and the Ethernet bus 32 (LAN, the first network) in FIG. 2, an end instruction command for closing the EPC communication firmware (EPC function program) 305a is transmitted to the EPC computer 300 at S4021. Upon receiving this, the EPC computer 300 proceeds to the close process, closes the EPC communication firmware 305a, and returns an end completion notification to the overall control module 9 if the termination process is successfully completed. Also, at S4022, an end instruction command for closing the base station communication firmware (base station function program) 405a is similarly transmitted to the radio base station computer 400. Upon receiving this, the radio base station computer 400 proceeds to the close process, closes the base station communication firmware 405a, and returns an end completion notification to the overall control module 9 if the termination process is successfully completed. The overall control module 9 confirms the normal termination of the EPC computer 300 and the radio base station computer 400 based on the reception or non-reception of the above end notification at S4023. If normal termination can be confirmed, the process proceeds to S4024, and I 2 Notify the C bus master 907 of normal termination. I 2 Upon receiving this, the C bus master 907 transmits an LED lighting command indicating "end" to the LED driver 17. As a result, the LED driver 17 turns off the LEDs 60A (power) and 60B (operation) in FIG. 19. Then, the process of the overall control module 9 proceeds to S4025. After the termination process of the overall control computer is performed, the power is turned off.

[0086] On the other hand, if it is not a normal termination at S4023 (i.e., in the case of an abnormality determination), the process proceeds to S4026, and I 2 Notify the C bus master 907 of the occurrence of an abnormality. At T4026, I 2In response to this, the C bus master 907 performs a process in which the LED 60A (power supply) in FIG. 19 continues to light and the LED 60B (operation) turns off. By the continued lighting of the LED 60A, the user can know that the termination process of the communication main body unit could not be completed normally. In this case, for example, it can also be configured to execute a forced termination process by long-pressing the power switch 65 or the like.

[0087] Next, FIG. 17 shows the flow of processing by the overall control firmware 905a when each communication firmware (EPC communication firmware and base station communication firmware) of the communication main body unit once starts up normally and then an abnormality occurs during operation. This process is repeatedly executed at predetermined time intervals, for example, by a timer process or the like. In S501, detection log collection from the cooling fans 14A, 14B (fan operation monitoring devices 84A, 84B), the temperature sensors 15A, 15B (internal temperature monitoring devices 85A, 85B), and the battery controller 24 is I 2 Instructed to the C bus master 907, and in S502, I 2 The detection logs of each device are received from the C bus master 907. This step is the same as the processing leading to S204 to S207 in FIG. 13. Then, in S503, the same abnormality analysis processing as in FIG. 14 is performed. And only in the case of an abnormality determination in S505, the termination process in FIG. 16 is executed (S506). In this way, when an operating environment abnormality occurs in the communication main body unit after the startup of the base station communication firmware 405a (base station function program) and the EPC communication firmware 305a (EPC function program), since the power is turned off after the termination processes of both firmwares are performed, the software data can also be protected from destruction in the above abnormal situation.

[0088] FIG. 18 shows the flow of processing by the overall control firmware 905a regarding the switching between the external power supply and the battery power supply for the power module 22. This process is also repeatedly executed at predetermined time intervals. In S601, acquisition of the detection log related to the received power voltage from the external voltage monitoring unit 16 (FIG. 4) is I 2 Instructed to the C bus master 907. In S602, I2 The C bus master 907 receives the detection log. In S603, if the detection log indicates that power is being received, the process proceeds to S604, where I 2 Notify the C bus master 907 that there is external power reception. I 2 Upon receiving this, the C bus master 907 sends a lighting command for the LED indicating "external power reception in progress" to the LED driver 17. As a result, the LED driver 17 lights the LED60F (external power supply) in FIG. 19 (T604).

[0089] On the other hand, if the detection log does not indicate that power is being received in S603, the process proceeds to S606, where I 2 Notify the C bus master 907 that there is no external power reception. I 2 Upon receiving this, the C bus master 907 sends a command to turn off the LED indicating "external power reception in progress" to the LED driver 17. As a result, the LED driver 17 turns off the LED60F (external power supply) in FIG. 19 (T606). Then, the process proceeds to S605 to switch the power supply to the rechargeable battery 21.

[0090] The embodiments of the present invention have been described above, but they are merely examples, and the present invention is not limited thereto.

Explanation of Reference Numerals

[0091] 1 Wireless communication unit 2 MME 3 EPC module 4 Radio base station module 5 UE (mobile terminal) 6 S-GW 7 P-GW 8 Router 9 Overall control module 11 Switching hub 14A, 14B Cooling fan (cooling device) 15A, 15B Temperature sensor 16 External voltage monitoring unit 21 Rechargeable battery 22 Power module 23 Portable housing 23y Airflow Inlet 23w Airflow Outlet 24 Battery Controller (Slave Node) 25 AC / DC Converter 26 External Power Supply 32 Ethernet Bus (First Network) 52 I 2 C Bus (Second Network) 57 Radio Bearer 65 Power Switch 66 Control Switch 60 LED (Operating Environment Abnormality Notification Section) 84A, 84B Fan Operation Monitoring Device (Cooling Device Drive State Information Acquisition Node, Slave Node) 85A, 85B Internal Temperature Monitoring Device (Internal Temperature Information Acquisition Node, Slave Node) 234 Intermediate Support Plate (Module Assembly Support Plate) 300 EPC Computer 301 CPU 302 RAM 303 Mask ROM 304 Ethernet Interface 305 Flash Memory 305a EPC Communication Firmware 305b MME Entity 305c S-GW Entity 305d P-GW Entity 305e Software Router 306 Internal Bus 400 Radio Base Station Computer 401 CPU 402 RAM 403 Mask ROM 404 Duplexer 405 Flash Memory 405a Base Station Communication Firmware 406 Internal Bus 408 Ethernet Interface 412 Wireless Communication Section 900 Overall control computer 901 CPU 902 RAM 903 Mask ROM 904 Ethernet interface (first interface, main startup command transmission unit) 905 Flash memory 905a Overall control firmware (operating environment abnormality determination unit, in-operation abnormality response processing unit) 906 Internal bus 907 I 2 C bus master (second interface, master node) 908 WiFi module 909 Input / output unit (main startup signal reception unit) 911 External PC 912 Wireless communication unit

Claims

1. a communication main unit including a wireless base station module including a wireless communication unit that performs wireless communication based on 3GPP specifications with a mobile terminal, a base station function program storage unit, and a base station computer that starts up and executes a base station function program stored in the base station function program storage unit upon receiving a main unit startup command, thereby performing wireless communication control for the wireless communication unit; and an EPC module that is wired connected to the wireless base station module and includes an EPC (Evolved Packet Core) function program storage unit, and an EPC computer that starts up and executes an EPC function program stored in the EPC function program storage unit upon receiving a main unit startup command, and performs upper network control for the wireless base station module based on the execution; a power supply module for supplying an operating voltage to the communication main unit; a portable housing that integrally houses the communication main body and the power supply module; a main startup signal receiving unit that receives an input of a main startup signal; an operating environment information acquiring unit that acquires operating environment information of the communication main unit within the portable housing including internal temperature information of the portable housing upon receipt of the main startup signal; an operating environment abnormality determining unit that determines whether an abnormality has occurred in the operating environment of the communication main unit based on the acquired operating environment information; a main unit startup command transmitting unit that transmits the main unit startup command to the communication main unit only when no operating environment abnormality has occurred; and an operating environment abnormality notifying unit that outputs an operating environment abnormality notification when the operating environment abnormality has occurred. a general control module including an abnormality processing unit during operation that performs a power cut-off process for the communication main unit; The base station function program storage unit and the EPC function program storage unit are configured with a non-volatile memory whose storage contents are rewritable in order to perform a process of changing part of the storage contents during execution of the base station function program and the EPC function program, The main start signal is input to the main start signal receiving unit in response to an operation of a predetermined start switch, the base station function program and the EPC function program are started up together in response to an input of the main start-up signal, When the operating environment abnormality determination unit determines that the operating environment abnormality has occurred, the operation abnormality response processing unit instructs the communication main unit to execute a close process for terminating each of the base station function program stored in the base station function program storage unit and the EPC function program stored in the EPC function program storage unit, and then performs a power cut-off process for the communication main unit.

13. A wireless communication unit comprising:

2. a cooling device for cooling an internal space of the portable housing is provided; The wireless communication unit according to claim 1 , wherein the operating environment information acquisition unit acquires the operating environment information that further includes operating state information of the cooling device.

3. The wireless communication unit of claim 2, wherein the operating environment abnormality determination unit of the overall control module determines that an operating environment abnormality has occurred when at least one of the following is true: operating status information of the cooling device indicates an operational abnormality of the cooling device, or internal temperature information of the portable housing exceeds a limit temperature.

4. A wireless communication unit as described in any one of claims 1 to 3, wherein a rechargeable battery is provided to supply a battery voltage to the power supply module, and the operating environment information acquisition unit acquires the operating environment information which further includes battery status information indicating the charging state and operating state of the rechargeable battery.

5. 5. The wireless communication unit according to claim 4, wherein the operating environment abnormality determination unit determines that the operating environment abnormality has occurred when a remaining battery charge reflected in the battery state information falls below a threshold value.

6. 6. The wireless communication unit of claim 5, wherein the power supply module is provided with an external power supply voltage receiving unit that receives an external power supply voltage, the operating environment information acquisition unit acquires the operating environment information that further includes power receiving status information of the external power supply voltage receiving unit, and the operating environment abnormality determination unit determines that the operating environment abnormality has occurred when the remaining battery charge reflected in the battery status information falls below a threshold value when the power receiving status information indicates that the external power supply voltage is not being received.

7. 7. The wireless communication unit according to any one of claims 1 to 6, wherein the abnormality response processing unit during operation instructs the communication main body unit to execute a close process for the base station function program stored in the base station function program memory unit and the EPC function program stored in the EPC function program memory unit when the operating environment abnormality determination unit determines that the operating environment abnormality has occurred after starting up the base station function program and the EPC function program in the communication main body unit, and then performs a power cut-off process for the communication main body unit.

8. a plurality of operating environment information acquisition nodes including an internal temperature information acquisition node for acquiring internal temperature information of the portable housing; The overall control module comprises a first network interface to which the base station computer and the EPC computer of the communication main body are connected via a first network, and a second network interface to which a plurality of the operating environment information acquisition nodes are connected via a second network, the operating environment information acquisition unit communicatively acquires the operating environment information from the operating environment information acquisition node via the second network interface, and the main body start-up command transmission unit transmits the main body start-up command to the communication main body via the first network interface.A wireless communication unit as described in any one of claims 1 to 7.

9. 9. The wireless communication unit according to claim 8, wherein the internal temperature information acquisition node acquires the internal temperature information from a temperature sensor provided in the portable housing.

10. 10. The wireless communication unit according to claim 8 or 9, wherein the second network connects a plurality of the operating environment information acquisition nodes as slave nodes to a master node included in the second network interface, the operating environment information acquisition unit includes an acquisition target information request destination notifying unit that notifies the master node of the destination of the request for acquisition target information, the master node sends an information request command to the second network in a form that specifies the address of the slave node that is the request destination, and a node among the slave nodes corresponding to the specified address acquires the information request command and transmits the acquisition target information indicated by the information request command to the master node via the second network.

11. 11. The wireless communication unit of claim 10, wherein the first network is a local area network and the second network is an I2C network.

12. When a module support plate is provided inside the portable housing, one main surface of the module support plate is defined as a module mounting surface, and the module support plate is horizontally disposed so that the module mounting surface is on the upper side, the direction rising vertically from the module mounting surface is defined as the up-down direction, an airflow inlet is formed in a side wall portion at a first end of the portable housing in the first direction defined along the module mounting surface, while an airflow outlet is formed in a side wall portion at a second end of the portable housing, and a cooling fan is attached to the airflow inlet, and by operating the cooling fan, outside air is taken in through the airflow inlet and the outside air circulates in the first direction inside the portable housing as cooling air, and is then discharged from the airflow outlet, A wireless communication unit as described in any one of claims 1 to 11, wherein a wireless drive system module group including the wireless base station module and a power supply module is arranged on the module mounting surface of the module support plate on the side closer to the airflow inlet in the flow direction of the cooling air, and a control system module group including the EPC module and an overall control module is arranged on the side closer to the airflow outlet, and as temperature sensors, a first temperature sensor is arranged in the occupied space of the wireless drive system module group and a second temperature sensor is arranged in the occupied space of the control system module group.

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