JP2021121072A - Wireless communication unit - Google Patents

Abstract

To provide a wireless communication unit that can prevent in advance, an internal wireless base station module and an EPC module malfunctioning or operating as a radio wave interference source for other wireless systems when abnormality such as a malfunction of a cooling device or temperature rise occurs inside a portable housing.SOLUTION: In a wireless communication unit, a communication main body including a wireless base station module and an EPC module is integrated by a portable housing, a base station function program and an EPC function program start up, and communication control is executed in response to input of a main activation signal, a centralized control module is provided separately from the wireless base station module and the EPC module, and the centralized control module acquires operating environment information including internal temperature information of the portable housing, and determines whether the operating environment of the communication main body is abnormal on the basis of the operating environment information. When an abnormal operating environment occurs, a main body start-up command is not transmitted, and the start-up processing of the base station function program and the EPC function program of the communication main body is not executed.SELECTED DRAWING: Figure 2

Description

In the present invention, the functions of the base station device and the core network (EPC) are integrated into a portable housing, and wireless network communication is performed between the mobile terminal and the mobile terminal according to the communication protocol stack defined by 3GPP (Third Generation Partnership Project). For viable wireless communication units.

In a high-speed communication standard based on the 3GPP specifications (for example, LTE (Long Term Evolution) or WiMAX (Worldwide Interoperability for Microwave Access) wireless communication network, an EPC (Evolved Packet Core) accommodating the wireless communication access network is constructed in the area. The wireless base station to which the mobile terminal is connected is controlled to send and receive IP packets via the EPC. On the other hand, with the spread of mobile terminals such as mobile phones, smartphones and tablet PCs, the sea and depopulation Request to use mobile terminals even in areas where EPCs and wireless base stations are not maintained in terms of infrastructure (hereinafter referred to as "wireless non-maintenance areas"), such as areas where communication functions have been lost due to disasters, etc. Is increasing.

In order to meet such demands, for example, Patent Document 1 proposes a composite wireless communication unit in which a wireless base station and a core network (EPC) are integrated. By installing such a wireless communication unit in the above-mentioned wireless non-developed area, a communication area is constructed by the wireless base station module included in the unit, although it is small, and the EPC module in the unit communicates above it. By performing control, it becomes possible to perform wireless communication of 3GPP specifications between a plurality of mobile terminals connected to the wireless base station module.

Japanese Unexamined Patent Publication No. 2016-12841

In the wireless communication unit as described above, among the hardware modules housed in the housing, particularly the wireless base station module and the power supply module that supplies the power supply voltage to the wireless base station module are provided with a radio wave transmitter having a large output by the wireless base station. Therefore, the power consumption is large and the heat generation is remarkable. Therefore, it is essential to cool the inside of the housing with a cooling mechanism such as a fan, but if an abnormality such as a failure occurs in the cooling mechanism and it does not operate normally, the radio base station and EPC will heat up. Therefore, there is a risk of malfunction or operation as a radio wave interference source of other wireless systems. Further, if the control program of the wireless base station or the EPC is started in a state where the temperature rises and normal operation cannot be expected, the program may run out of control and the software data may be destroyed. In particular, if the wireless base station module and the EPC module are integrated in the same housing instead of individual units, the two modules will be exposed to high temperatures at the same time when the temperature inside the housing rises. .. In particular, if the control programs of these two modules are collectively started by a single switch operation or the like, the risk that the above-mentioned problems occur in the two modules at the same time increases, and the influence is particularly serious. ..

An object of the present invention is that when an abnormality such as a malfunction of a cooling device or a temperature rise occurs inside a portable housing, the internal wireless base station module and the EPC module malfunction, or radio wave interference of another wireless system occurs. The purpose is to provide a wireless communication unit that can prevent the risk of operating as a source.

In order to solve the above problems, the wireless communication unit of the present invention receives a wireless communication unit that performs wireless communication with a mobile terminal based on the 3GPP specifications, a base station function program storage unit, and a main unit start-up command. By doing so, a radio base station module equipped with a base station computer that starts and executes a base station function program stored in the base station function program storage unit and performs wireless communication control for the wireless communication unit, and a wireless base station module. The EPC (Evolved Packet Core) function program storage unit, which is connected by wire, and the EPC function program stored in the EPC function program storage unit are started and executed by receiving the main unit startup command, and wirelessly based on the execution. A communication main unit including an EPC module including an EPC computer that controls an upper network for a base station module, a power supply module that supplies an operating voltage to the communication main unit, and a communication main unit and a power supply module are integrally housed. The portable housing, the main activation signal receiving unit that accepts the input of the main activation signal, and the operating environment information of the communication main unit in the portable housing along with the reception of the main activation signal, the internal temperature information of the portable housing An operating environment abnormality acquisition unit that is acquired so as to include, an operating environment abnormality determination unit that determines whether or not an abnormality has occurred in the operating environment of the communication main unit based on the acquired operating environment information, and an operating environment abnormality have occurred. A general manager that has a main unit start-up command transmission unit that sends a main unit startup command to the communication main unit only when it is not working, and an operating environment abnormality notification unit that outputs an operating environment abnormality notification output when an operating environment abnormality has occurred. It is characterized by having a control module.

The wireless communication unit of the present invention can be configured such that the main activation signal is input to the main activation signal receiving unit in accordance with the operation of one predetermined activation switch.

The wireless communication unit of the present invention may 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 as further including the driving state information of the cooling device. In this case, the operating environment abnormality determination unit of the integrated control module determines at least whether the drive state information of the cooling device indicates the operation abnormality of the cooling device or the internal temperature information of the portable housing exceeds the limit temperature. It can be configured to determine that an operating environment abnormality has occurred when either of them is satisfied.

Further, the wireless communication unit of the present invention may be provided with a rechargeable battery that supplies a battery voltage to the power supply module. The operating environment information acquisition unit can be configured to acquire the operating environment information as further including the charging state of the rechargeable battery and the battery state information indicating the operating state. The operating environment abnormality determination unit can be configured as, for example, determining that an operating environment abnormality has occurred when the remaining battery level reflected in the battery status information is less than the threshold value. Further, the power supply module may be provided with an external power supply voltage power receiving unit that receives the external power supply voltage. In this case, the operating environment information acquisition unit acquires the operating environment information as further including the power receiving state information of the external power supply voltage power receiving unit, and the operating environment abnormality determination unit receives the external power supply voltage from the power receiving state information. It can be configured to determine that an operating environment abnormality has occurred when the remaining battery level reflected in the battery status information is less than the threshold value in the state indicating that the battery status is not set.

The integrated control module is stored in the base station function program storage unit when the operating environment abnormality determination unit determines that an operating environment abnormality has occurred after the base station function program and the EPC function program are started in the communication main unit. It is equipped with an operating abnormality response processing unit that commands the communication main unit to execute the close processing of the base station function program and the EPC function program stored in the EPC function program storage unit, and then shuts off the power of the communication main unit. Can be configured as.

The wireless communication unit of the present invention may be provided with a plurality of operating environment information acquisition nodes including an internal temperature information acquisition node that acquires the internal temperature information of the portable housing. The integrated control module has a first network interface in which the base station computer and the EPC computer of the communication main unit are connected via the first network, and a plurality of operating environment information acquisition nodes are connected via the second network. The operating environment information acquisition unit acquires operating environment information from the operating environment information acquisition node via the second network interface, and the main unit startup command transmission unit is the first. It can be configured to send a main unit start-up command to the communication main unit via the network interface of.

The second network connects a plurality of operating environment information acquisition nodes as slave nodes to the master node included in the second network interface, and the operating environment information acquisition unit masters the request destination of the acquisition target information. It is equipped with an acquisition target information request destination notification unit that notifies the node, and the master node sends an information request command to the second network in the form of addressing the slave node that is the request destination, and sends it to the specified address among the slave nodes. The corresponding node can be configured to acquire the information request command and transmit the acquisition target information indicated by the information request command to the master node via the second network. Specifically, the first network is a local area network for example (LAN (Local Area Network)) , the second network is the I ^{2 C} network.

Further, 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 arranged so that the module mounting surface is on the upper side. When the direction of rising vertically from the module mounting surface is defined as the vertical direction, the airflow inlet is located on the side wall on the first end side in the first direction of the portable housing in the first direction defined along the module mounting surface. On the other hand, an airflow outlet is formed on the side wall on the second end side, a cooling fan forming a cooling device is attached to the airflow inlet, and the outside air is taken in from the airflow inlet and the outside air is cooled by the operation of the cooling fan. After flowing through the inside of the portable housing in the first direction as wind, it is discharged from the airflow outlet, and the module mounting surface of the module support plate is wireless to the side closer to the airflow inlet in the flow direction of the cooling air. The wireless drive system module group including the base station module and the power supply module is arranged, and the control system module group including the EPC module and the integrated control module are arranged on the side near the airflow outlet, and the first temperature sensor is used as the temperature sensor. The second temperature sensor can be arranged in the occupied space of the wireless drive system module group, respectively, in the occupied space of the control system module group.

In the wireless communication unit of the present invention, the communication main body including the wireless base station module and the EPC module is integrated by a portable housing, and the base station function program and the EPC function program are integrated in response to the input of the main activation signal. It starts up and communication control is started. On the other hand, a centralized control module is provided separately from the wireless base station module and the EPC module, and the centralized control module acquires operating environment information including internal temperature information of the portable housing, and based on this, the operating environment of the communication main unit. Judge whether or not an abnormality has occurred in. Then, when an abnormality in the operating environment occurs, the main body start-up command is not transmitted, and the start-up process of the base station function program and the EPC function program of the communication main body unit is not executed. As a result, even if an abnormality occurs in the operating environment of the communication main unit when the wireless base station module and the EPC module are exposed to high temperatures at the same time in the portable housing, the wireless base station and the EPC malfunction. It is unlikely that there will be a risk of causing a problem or operating as a radio wave interference source for other wireless systems. Further, when an abnormality occurs, the activation of the base station function program and the EPC function program itself is prevented, so that the software data can be prevented from being destroyed due to the runaway of the program or the like.

The schematic diagram which shows the concept of the wireless communication unit of this invention. The block diagram which shows an example of the electric structure of the wireless communication unit of FIG. Another block diagram showing the configuration of FIG. 2 together with the power supply system. A connection structure of each master node and the slave nodes 2 by I 2 ^C network an explanatory diagram showing the frame structure in the I 2 ^C communication. Conceptual diagram of IP packet structure. The figure which conceptually shows the protocol stack of the control plane of 3GPP. The figure which conceptually shows the protocol stack of the user plane of 3GPP. The figure which conceptually shows the channel mapping of the downlink of 3GPP. Similarly, a diagram conceptually showing uplink channel mapping. The conceptual diagram which shows the relationship between a frequency band channel and a resource block. Flowchart illustrating a process flow of the Read mode of the master node in the I ² C communication. Flowchart illustrating a process flow of the Write mode of the master node in the I ² C communication. A flowchart showing the processing flow of the boot sequence in the control firmware of the integrated control module. Similarly, a flowchart showing the flow of abnormality analysis processing. Similarly, a flowchart showing the processing flow of the normal end sequence. The flowchart which shows the flow of the end processing of FIG. The flowchart which shows the flow of the operation abnormality correspondence processing in the control firmware of the integrated control module. Similarly, a flowchart showing the flow of power switching processing. The figure which shows the configuration example of the notification LED. The figure which shows the modification of the information acquisition form from a cooling fan. The side view which shows an example of the arrangement form of each module inside a portable housing. Also a plan view. The plan view which also shows the arrangement on the intermediate support plate. The plan view which shows the action of a cooling fan. A side view showing the details of the operation of the cooling fan and the airflow guide plate.

Hereinafter, embodiments for carrying out the present invention will be described with reference to 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 connected to a plurality of UEs (mobile terminal devices) 5 according to the communication protocol stack of the method specified by 3GPP (in this embodiment, LTE is used, but other methods such as WiMAX may be used). It is configured to perform wireless communication between them. The wireless communication unit 1 is installed and used in a wireless non-developed area where an EPC or a wireless base station is not infrastructure-developed, such as an area where the communication function is lost due to a sea, a depopulated area, a disaster, or the like. As described later, the wireless communication unit 1 can procure a power supply voltage from a battery, a private power generation device, or the like, and can easily construct a self-employed wireless network that does not depend on the public network. Each UE 5 is connected to the wireless communication unit 1 by a wireless bearer 57.

The wireless communication unit 1 is wiredly connected to the wireless base station module (radio base station or eNodeB (evolved NodeB)) 4 and the wireless base station module 4, and functions as an upper network control unit for the wireless base station module 4 (EPC). Evolved Packet Core) Module 3 and. The EPC module 3 has an MME (Mobility Management Entity) 2 as a gateway on the control plane side, an S-GW (Serving Gateway) 6 as a gateway on the user plane side, and an upstream network element (here, a router 8). It has a P-GW (PDN (Packet Data Network) Gateway) 7 that is located at a node and manages IP addresses toward the upstream network element side. The router 8 connects to an application server (not shown) via an external network 60 (for example, the Internet) wirelessly (for example, satellite communication) or by wire, and fulfills a function of acquiring content data such as a terminal application or a moving image (video). On the control plane side, the radio base station module (eNodeB) 4 is connected to the MME 2 via the S1-MME interface. Further, 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.

FIG. 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, in which the EPC module 3, the wireless base station module 4, the integrated control module 9, and the power supply module 22 are housed together with peripheral components. Further, the portable housing 23 is provided with cooling fans 14A and 14B (cooling devices) for cooling the inside. The EPC module 3 and the radio base station module 4 form a communication main body.

The EPC module 3 is mainly composed of the EPC computer 300. The EPC computer 300 stores the CPU 301, the RAM 302 that serves as the program execution area, the mask ROM 303 (which stores firmware for peripheral control of microcomputer hardware that does not need to be permanently rewritten; the same applies hereinafter), and connects them to each other. It consists of an internal bus 306 and the like. A non-volatile storage device whose storage contents can be rewritten, for example, a flash memory 305, is connected to the internal bus 306 as an EPC function program storage unit, and the EPC communication firmware 305a (EPC function program) including an LTE protocol stack for EPC is connected thereto. The MME entity 305b, S-GW entity 305c, and P-GW entity 305d that virtually realize the functions of MME2, S-GW6, and P-GW7 in FIG. 2 using the LTE protocol stack as a platform, and FIG. Each program of the software router 305e for realizing the function of the router 8 of the above is installed. Further, an Ethernet interface 304, which is a LAN interface, is connected to the internal bus 306. In the above configuration, MME2, S-GW6, and P-GW7 in FIG. 2 are configured as virtual functional entities whose functions are realized by software on computer hardware, but each is configured by independent hardware logic. You may.

The radio base station module 4 is mainly composed of a radio base station computer 400. The wireless base station computer 400 includes a CPU 401, a RAM 402 that serves as a program execution area, a mask ROM 403, an internal bus 406 that connects them to each other, and the like. A flash memory 405 is connected to the internal bus 406 as a base station function program storage unit, and base station communication firmware 405a (base station function program) including an LTE protocol stack for a radio base station is stored therein. Further, the internal bus 406 is connected to a wireless communication unit 412 for wirelessly connecting to the UE 5 by constructing a wireless bearer, and an Ethernet interface 408.

The integrated control module 9 is mainly composed of the integrated control computer 900. The integrated control computer 900 includes a CPU 901, a RAM 902 that serves as a program execution area, a mask ROM 903, and an internal bus 906 that connects them to each other. A flash memory 905 is connected to the internal bus 906, and the integrated control firmware 905a is stored therein. Further, an Ethernet interface 904 (first interface), an input / output unit (I / O) 909, and a WiFi module 908 are connected to the internal bus 906. Further, in order to expand the function of the integrated control module 9, a control board 13 that controls the control signals input / output to the integrated control module 9 is separately provided. The control board ^{13, I 2 C (Inter-} Integrated Circuit) bus master 907 (the second interface, the master node) and extended input-output unit (I / O) 910 is mounted, each input of the integrated control module 9 It is connected to the output unit (I / O) 909. In a broad sense, the control board 13 can be regarded as one component of the integrated control module.

The EPC computer 300, the radio base station computer 400, and the central control computer 900 are connected by an Ethernet bus 32 (or LAN cable) via a switching hub (for example, an L2 switch) 11 at Ethernet interfaces 304, 404, 904. There is. That is, the EPC computer 300, the wireless base station computer 400, and the central control computer 900 are connected to each other via a LAN via the switching hub 11, and are capable of network communication with each other according to the Internet Protocol (IP).

The power supply module 22 supplies a power supply voltage to each component such as the EPC module 3, the radio base station module 4, the central control module 9, the switching hub 11, and the cooling fans 14A and 14B, and is an external power supply 26 (for example, commercial AC). : AC100V) and a rechargeable battery 21 (for example, a lithium ion secondary battery module, a nickel hydrogen secondary battery module, etc.) receive the original voltage via the battery controller 24. In the present embodiment, the AC voltage of the external power supply 26 is converted into a DC voltage (DC12V) by the AC / DC converter 25 and supplied to the power supply module 22. The power receiving state (power receiving 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.

Further, the battery voltage of the rechargeable battery 21 is converted into a stabilized DC voltage (DC12V) by the battery controller 24 and supplied to the power supply module 22. As a result, the wireless communication unit 1 can autonomously procure the drive power supply voltage from the secondary battery module 21, and even in an installation location where the external power supply voltage such as commercial AC cannot be used (for example, a disaster area where a power failure occurs). It can be used without problems. The portable housing 23 is a box type made of metal or reinforced resin.

Also, the battery controller 24 is one configured as a commercially available I ^{2 C} devices are used, a plurality of rechargeable batteries 21 are parallel and detachably mounted. 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 installed. At this time, each rechargeable battery 21 can be hot-swapped on the battery controller 24. Further, 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 by 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 failure, the wireless communication unit 1 continues to operate without a momentary power failure by switching to power reception from the secondary battery module 21. It is possible (described later).

The power supply module 22 is equipped with a plurality of stabilized DC power supply circuits (not shown) having different output voltages in order to correspond to a plurality of DC power supply voltages required by each component. FIG. 3 shows a power supply form to each component in the wireless communication unit 1. A circle on the frame line of each component indicates a power supply terminal, and a broken line connecting these indicates a power supply line. In the present embodiment, DC3.5V is distributed and input to the EPC module 3 having only the EPC computer 300 as the main hardware, and DC5V is distributed and input to the switching hub 11 having the switching drive unit via the backplane 12. .. Further, DC3.5V is input to the radio base station module 4 having the wireless communication unit 412, and DC5V is input to the integrated control module 9 having the WiFi module 908. Further, in FIG. 3, a □ mark on the frame line of each component indicates a LAN port, and a solid line (single) connecting these indicates an Ethernet bus (or LAN cable) 32 forming the first network. Further, ■ sign frame line of each component represents the I ^{2 C} ports, a solid line connecting these (double) shows the I ^{2 C} bus 52 constituting a second network. The ● mark indicates the port for external connection (and the corresponding terminal on the component). Specifically, as the external port group 31A of the software router 8, the APP port (application server connection port), MNT port (port for connecting to the operation management LAN of the wireless communication unit 1), BH port (Internet, etc.) There is a backhole port) for connecting to. Further, the external port group 31B of the wireless base station module 4 is for connecting the antenna 413 to the wireless communication unit 412 of FIG. The TRx1 port is a connection port for the transmission / reception shared antenna, and the Rx2 port is a connection port for the reception antenna forming the reception diversity with the transmission / reception shared antenna (in FIG. 2, one antenna 413 composed of these plurality of antenna groups is used. It is shown in a simplified form as an antenna).

Next, as shown in FIG. 2, a power switch 65, a control switch 66, and a plurality of LEDs 60 forming an operating environment abnormality notification unit are provided on the portable housing 23. The power switch 65 and the control switch 66 are connected to the expansion input / output unit 910 on the control board 13. Further, the plurality of LED60 are connected via a current regulation resistor 62 (see FIG. 3) to the LED driver 17 that is configured as a ^{I 2} C devices. 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 the resistor 67, and a binary switch signal reflecting the switch open / closed state is sent to the extended input / output unit 910. input. Of these, the switch signal input by operating the power switch 65 serves as the main start-up signal and is used as a command signal for collectively starting up the EPC communication firmware 305a and the base station communication firmware 405a (extended input / output unit 910). Functions as the main activation signal reception unit). Further, the switch signal input by operating the control switch 66 is used for system reset and other control inputs.

On the other hand, the radio base station module 4 has a first temperature sensor (hereinafter, also referred to as “temperature sensor 1” in the drawings) 15A, and the control board 13 described later has a second temperature sensor (hereinafter, “temperature” in the drawings). (Also displayed as "Sensor 2") 15B are provided respectively. Hereinafter, an example of the internal structure of the wireless communication unit 1 will be described together with the arrangement form of each module, the temperature sensors 15A and 15B, and the cooling fans 14A and 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 (first direction: left-right direction in the paper surface) of the portable housing 23, an airflow inlet 23y is formed on a side wall portion on the first end side thereof, and cooling fans 14A and 14B are attached thereto. Specifically, as shown in FIG. 22, a pair of cooling fans 14A and 14B are arranged at predetermined intervals in the width direction (second direction: vertical direction of the paper surface) of the portable housing 23. On the other hand, as shown in FIG. 22, an airflow outlet 23w is formed on the side wall portion on the second end side in the longitudinal direction of the portable housing 23, and is covered with the air filter 23f. By the operation of the cooling fans 14A and 14B, the outside air FA is taken in from the airflow inlet 23y, flows through the inside of the portable housing 23 as cooling air in the longitudinal direction, and then is discharged from the airflow outlet 23w.

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 under the transmission / reception shared antenna included in the antenna 413 of the wireless communication unit 412, and electrically separates the antenna transmission path and the antenna reception path to provide a strong transmission wave. Is a component that prevents the antenna from flowing into the receiving side. In the case of a radio base station, since the transmitted wave output is as high as about 100 to 250 W, a large low-pass filter component composed of a cavity filter or the like is included. The duplexer 404 has a large spatial dimension, but a small calorific value. 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.

Next, an intermediate support plate 234 is arranged 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 arranged on the outer peripheral edge of the plate surface. The upper surface of the intermediate support plate 234 forms a module mounting surface, and the radio base station is located upstream (closer to the airflow inlet 23y) in the flow direction (longitudinal direction, first direction) of the cooling air inside the portable housing 23. The wireless drive system module group including the module 4 and the power supply module 22 is arranged, and the control system module group including the EPC module 3, the integrated control module 9 and the control board 13 is also arranged on the downstream side (the side close to the airflow outlet 23w). ing. By arranging the wireless drive system module group that generates a large amount of heat on the windward side of the cooling air, the wireless drive system module group can be effectively cooled, and by separating the control system module group on the leeward side, the control system can be effectively cooled. It is possible to prevent an excessive temperature rise of the module group. In the temperature sensors 15A and 15B described above, the first temperature sensor 15A is arranged in the occupied space of the wireless drive system module group, and the second temperature sensor 15B is arranged in the occupied space of the control system module group. .. In the following description, the direction in which the intermediate support plate 234 (module support plate) is arranged horizontally and rises vertically from the upper surface (module mounting surface) will be defined as the vertical direction for convenience. The orientation of the module mounting surface in 23 is not limited to the horizontal direction, and for example, the module mounting surface may be inclined or orthogonal to the horizontal plane.

By arranging the first temperature sensor 15A in the occupied space of the wireless drive system module group that generates a large amount of heat during operation and detecting the temperature, the behavior of the wireless drive system module group as a heat source in the portable housing 23. Can be grasped. On the other hand, by arranging the second temperature sensor 15B in the occupied space of the control system module group that generates less heat during operation and detecting the temperature, even the cooling air after passing through the wireless drive system module group can be applied to the control system module group. It is possible to accurately grasp whether or not the cooling effect is sufficiently achieved. Further, by combining the temperature detection in the vicinity of the heat generation source (wireless drive system module group) and the temperature detection at a position away from the heat generation source on the downstream side in the blowing direction as described above, the inside of the portable housing 23 can be accommodated. It may be easier to identify the cause when a temperature abnormality occurs. For example, when the cooling fans 14A and 14B are stopped due to an abnormality, the detection temperature of the first temperature sensor 15A near the heat generation source starts to rise immediately, and then the detection temperature of the second temperature sensor 15B is slightly delayed. Unique behavior such as rising occurs. Further, when an overcurrent occurs due to a short circuit or the like in the control system module group, the detection temperature of the first temperature sensor 15A does not change so much, whereas the second temperature sensor that detects heat generation in the control system module group. The detection temperature of 15B starts to rise sharply. By referring to the above-mentioned difference in temperature detection behavior between the two temperature sensors 15A and 15B, it is possible to easily obtain information that contributes to the identification of the cause of the occurrence of the temperature abnormality.

The radio base station module 4 and the power supply module 22 are arranged vertically adjacent to each other on the module mounting surface (upper surface) of the intermediate support plate 234 so that the main surfaces of the boards 4s and 22s on which the components are mounted overlap each other in a plan view. At the same time, a cooling air flow gap 231 is formed between the two. The mounting positions of the cooling fans 14A and 14B are determined with respect to the portable housing 23 so that a part of the cooling air can be blown into the cooling air flow gap 231. By arranging the wireless base station module 4 and the power supply module 22 that form a wireless drive system module group having a large amount of heat generation adjacent to each other as described above, the wireless drive system module group is exclusively used for the module mounting surface in the portable housing 23. The area can be reduced, which contributes to the compactness of the wireless communication unit 1. Then, although the radio base station module 4 and the power supply module 22 having a large amount of heat generation are arranged adjacent to each other, the cooling air is sent to the cooling air flow gap 231 formed between the two to generate the cooling air. The heat can be discharged more effectively, and the excessive rise in the temperature of the wireless drive system modules can be suppressed more effectively.

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 vertically connected to each other by a support column 232.

Further, the power supply module 22 is arranged on the lower side and the wireless base station module 4 is arranged on the upper side with respect to the module mounting surface of the intermediate support plate 234, and the cooling air from the cooling fans 14A and 14B is the cooling air flow gap 231. In the direction normal to the first airflow CFA toward the radio base station module 4 and the substrate 4s of the radio base station module 4, the side opposite to the cooling air flow gap 231 (that is, the upper surface of the radio base station module 4 in FIG. 21). It is designed to split into the second airflow CFB toward the side). As a result, the cooling air can be circulated up and down especially for the radio base station module 4 having a large amount of heat generation, and more efficient cooling becomes possible. When the transmission output of the radio base station module 4 is, for example, 100 to 250 W, the wind speed of the cooling air by the cooling fans 14A and 14B should be secured at about 1 to 2 m / sec.

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, that is, the one located at the uppermost portion of the plurality of substrates 4s, and is made of aluminum in close contact with the upper surface of the power semiconductor element 4a. A heat sink plate 4h made of metal such as the above is provided. A plurality of metal heat radiating fins 4f are integrally formed on the upper surface of the heat sink plate 4h so as to rise vertically from the upper surface of the heat sink plate 4h. As shown in FIG. 22, the longitudinal direction of the heat radiating fins 4f is arranged so as to coincide with the longitudinal direction of the portable housing 23 (the direction in which the cooling air is blown), and the gap between the adjacent radiating fins 4f and 4f is cooled. It forms a wind passage 4k (see FIG. 24). As a result, the cooling efficiency of the power semiconductor element 4a by the second airflow CFB of FIG. 21 can be significantly improved.

As shown in FIG. 21, the cooling fans 14A and 14B are attached to the portable housing 23 so that the extension of the rotation axis J of the fan rotation blades 14p passes through the intermediate position in the height direction of the side surface of the wireless drive system module group. Has been done. 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 housed in a fan rotating blade 14p. The main body portion 14m is attached to the base portion 14b so that the extension of the rotation axis J of the fan rotation blade 14p is inclined upward so as to enter the inside of the cooling air flow gap 231. As a result, the cooling air of the cooling fans 14A and 14B is efficiently blown from the diagonally lower side of the first airflow CFA with respect to the cooling air flow gap 231 while the upper surface side (heat sink) of the radio base station module 4 far from the module mounting surface. The second airflow CFB can also be guided at a relatively large flow rate on the side where the plate 4h and the heat radiating fins 4f are provided).

An airflow guide plate 14s for dividing the cooling air into the first airflow CFA and the second airflow CFB is provided on the front side of the cooling fans 14A and 14B in the delivery direction. The airflow guide plate 14s is arranged so that the plate surface is inclined upward from the rotation axis J of the fan rotation blade 14p so that the second airflow CFB is guided to the upper surface side of the wireless drive system module. As a result, the second airflow CFB can be 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) to promote cooling of the wireless drive system module group. can. As shown in FIG. 24, the airflow guide plate 14s has mounting arm portions 14sf integrated at both ends, and is fixed to the base portions 14b of the cooling fans 14A and 14B by fastening members 14t such as screws at the mounting arm portions 14sf. Has been done.

Further, as shown in FIG. 21, a shielding plate 4p is attached to the upper surface side of the heat radiation fin 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 the shielding plate 4p, the above-mentioned cooling air passage 4k is formed between the adjacent heat radiation fins 4f and 4f in a square cross section whose upper part is blocked by the shielding plate 4p. .. As shown in FIG. 25, the second airflow CFB blown from diagonally below to the entrance of the passage 4k will blow through above the passage 4k if the shielding plate 4p does not exist, and is along the plate surface of the heat sink plate 4h. It is difficult for the cooling air flow to be formed. However, if the shielding plate 4p is provided, the second airflow CFB is prevented from coming out upward, the flow inside the passage 4k becomes dominant, and the second airflow CFB is more efficient than the plate surface of the heat sink plate 4h. Can be brought into contact with each other. In addition, the edge effect is generated by the second airflow CFB hitting the edge of the shielding plate 4p on the entrance side from diagonally below, and the flow is throttled by the Karman vortex generated near the entrance inside the passage 4k, resulting in speeding up. The effect of drawing airflow into the passage 4k can also be expected due to the depressurizing effect.

Returning to FIG. 21, the EPC module 3, the integrated control module 9, the switching hub 11, and the control board 13 forming the control system module group have the wireless drive system module group (radio base station module 4 and the power supply) in the direction of blowing the cooling air. It is arranged on the downstream side of the module 22). Of these, the overall control module 9 and the control board 13 are directly mounted on the intermediate support plate 234. FIG. 23 shows the mounting layout of each board on the upper surface (module mounting surface) of the intermediate support plate 234, and is orthogonal to the longitudinal direction (blower direction, left-right direction in the drawing) of the portable housing 23 in the module mounting surface. When the direction of operation is defined as the depth direction, the board of the control module 9 and the control board 13 are assembled in the depth direction on the downstream side of the air blowing direction of the power supply module 22 so as to be adjacent to each other with respect to the intermediate support plate 234. Has been done.

Further, four columnar substrate support frames 236 are erected on the downstream side of the power supply module 22 in the blowing direction. As shown in FIG. 21, the substrate 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 a gap for blowing air. There is.

Next, the temperature sensors 15A and 15B are attached to the internal temperature monitoring devices 85A and 85B (upper FIG. 4) that form the drive state information acquisition node, and the internal temperature information of the portable housing 23 is used as the operating environment information of the communication main body. Play a role in acquiring. As shown in FIG. 21, the temperature sensors 15A and 15B are both mounted on the substrate constituting the internal temperature monitoring devices 85A and 85B. The first temperature sensor 15A is attached to the side surface of the radio base station module 4 together with the substrate of the internal temperature monitoring device 85A. The second temperature sensor 15B, together with the substrate in the internal temperature monitoring device 85B, the control board 13 is mounted on a substrate 907s of ^{I 2} C bus master 907 erected on (substrate 907s control broadly board 13 It shall belong to). Both the temperature sensors 15A and 15B are arranged so as to detect the temperature at the side position in the depth direction of the wireless drive system module group and the control system module group.

On the other hand, the cooling fans 14A and 14B incorporate fan operation monitoring devices 84A and 84B (upper FIG. 4: cooling device drive status information acquisition node and slave node) that form drive status information acquisition nodes, and the operating environment of the communication main unit. As information, for example, it plays a role of monitoring and acquiring the rotation speed, temperature, drive current value, etc. of the fan. Further, the external voltage monitoring unit 16 serves as a drive state information acquisition node, and plays a role of monitoring and acquiring the received voltage from the AC / DC converter 25 of the power supply module 22 as operating environment information. Further, the battery controller 24 also serves as a drive state information acquisition node, and plays a role of monitoring and acquiring the remaining battery (BTT), battery voltage, and battery temperature as operating environment information.

As shown on FIG. 4 configuration, the fan operation monitoring device 84A constituting the operating environment information acquisition nodes, 84B, internal temperature monitoring devices 85A, 85B, the external voltage monitoring unit 16 and the battery controller 24 as the slave node ^{I 2} C communication Has been done. On the other hand, the control board I ^{2 C} bus master 907 on 13 functions as a master node in I ^{2 C} communication, together with the respective slave node (operating environment information acquisition nodes) are connected by I ^{2 C} bus 52, each slave node The operating environment information acquisition unit that acquires the operating environment information in the form of a detection log is configured.

In this way, a network (second network) for acquiring operating environment information from the communication network (first network) that connects the central control module 9 and the communication main unit (base station computer 400 and EPC computer 300). By separating), the communication sequence for acquiring the operating environment information can be made independent from the complicated communication sequence required for controlling the communication main unit itself, making the acquisition of the operating environment information easier and smoother. It can be carried out. In addition, a master node is provided on the second network interface side, and an information request command is sent from the master node to the slave node by specifying the address of the slave node that becomes the operating environment information acquisition node, and the slave node responds to this. By configuring to send the operating environment information from to the master node, it is possible to collect the operating environment information more efficiently without causing the sequence to be complicated when acquiring the operating environment information from multiple devices. .. Such second network, in particular by using the I ^{2 C} network, relatively even greater operating environment information size becomes possible to transmit and receive control easily by serial communication, complicated output port control process Is also unnecessary.

Hereinafter, the outline of ^{I 2} C communications. In I 2 ^C communication, the master node (I 2 ^C bus master 907) and a slave node is clearly divided, the master node led control. I ^{2 C} bus 52 which connects the master node and the slave node consists of two lines of a clock line SCL and a data line SDA, based on the clock signal by the master node transmits a clock line SCL, the 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.

Figure 4 shows the structure of a data frame 1100 of ^{I 2} C communication down. The data frame 1100 includes the following fields.
Address field 1101: The address of the slave node that is the data transfer destination 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 addresses based on the clock at this time, and only slave nodes that match their own addresses continue transmission and reception thereafter. Fan operation monitoring devices 84A and 84B, internal temperature monitoring devices 85A and 85B, external voltage monitoring unit 16 and battery controller 24, which form operating environment information acquisition nodes, are assigned different addresses, and the addresses are used to acquire operating environment information. It also functions as information that identifies the type of target device.
R / W field 1102: 1-bit R / W mode information is transferred. When the R / W mode information is "0", information is input from the slave (S) to the master (M) (Read mode: information is read from the slave node), and when the R / W mode information is "1", it is input. Indicates that the information is output from the master (M) to the slave (S) (Write mode: information is written to the slave node). The transfer direction is master (M) → slave (S).
ACK1103: An acknowledge signal for transmission / 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: 1 byte (8 bits) of information (data or command) is transferred. The transfer direction is master (M) → slave (S) in the Read mode, and master (M) ← slave (S) in the Write mode. When the content is a command, the type of operating environment information to be acquired (for example, in the case of the battery controller 24, the remaining battery level, battery voltage, temperature, etc.) is set to that type for each type of device forming the slave node. It will be specified by the uniquely associated command.
ACK1105: An acknowledge signal for transmission / reception of a data field, and the transfer direction is master (M) ← slave (S) in Read mode and master (M) → slave (S) in Write mode.
If the total size of the information to be transferred is larger than the size of the data field 1104, the information is transferred by dividing the information into a plurality of data fields 1104.

FIG. 11 shows a processing flow of the master node in the Read mode. The ^{I 2} C bus (SCL and SAD) and information transfer start condition (Start Condition) at S151, and outputs an address of the slave node that is information requested in S152, and outputs "0" as the R / W mode information .. If there is an ACK input in S153, the process proceeds to S154, and data (or a command) from the slave node is input (if there is no ACK, the process proceeds to the error processing in S159). If the data (or command) is normally input in S155, the process proceeds to S156, and ACK is returned to the slave node (if the data (or command) cannot be input normally, the process proceeds to the error processing of S159). If the input of all data is not completed in S157, the process returns to S154 and the following processing is repeated. On the other hand, when the input of all data is completed in S157 proceeds to S158, and the ^{I 2} C bus information transfer end status (Stop Condition), and ends.

FIG. 12 shows the processing flow of the master node in the Write mode. S101 the I ^{2 C} bus and Start Condition at outputs the address of the slave node that is information forwarded by S102, and outputs "1" as the R / W mode information. If there is an input of ACK in S103, the process proceeds to S104 to output data (or a command) (if there is no ACK, the process proceeds to error processing in S108). If the ACK from the slave node can be received in S105, the process proceeds to S106, and it is confirmed whether or not the output of all data has been completed. If it is not completed, the process returns to S104 and the following processing is repeated. On the other hand, when the output of all the data is completed in S106 proceeds to S107, and the ^{I 2} C bus information transfer end status (Stop Condition), and ends.

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

6 and 7 show a 3GPP specification radio protocol stack that is the basis of the EPC communication firmware 305a or the base station communication firmware 405a. FIG. 6 shows the protocol stack of the user plane, and FIG. 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 a PHY (physical) layer. Layer 2 includes a MAC (Medium Access Control) layer, an RLC (Radio Link Control) layer, and a PDCP (Packet Data Convergence Protocol) layer. Layer 3 includes an RRC (Radio Resource Control) layer and a NAS (Non-Access Stratum) layer.

The role of each layer is as follows.
-PHY layer: Performs coding / decoding, modulation / demodulation, antenna mapping / demapping, and resource mapping / demapping.
-MAC layer: Performs data priority control, retransmission control processing by HARQ, random access procedure, and the like. Data and control signals are transmitted between the MAC layer of the UE 5 and the MAC layer of the radio base station module 4 via the transport channel. The MAC layer of the radio base station module 4 includes a scheduler that determines the transport format (transport block size, modulation / coding method (MCS)) of the upper and lower links and the resource block allocated to the UE 5.

-RLC layer: Data is transmitted to the receiving RLC layer by utilizing the functions of the MAC layer and the PHY layer. Data and control signals are transmitted between the RLC layer of the UE 5 and the RLC layer of the radio base station module 4 via a logical channel.
-PDCP layer: Compresses / decompresses the header of the PDU, and encrypts / decrypts it.
RRC layer: Defined only in the control plane that handles the control signal. Messages for various settings (RRC messages) are transmitted between the RRC layer of the UE 5 and the RRC layer of the radio base station module 4. The RRC layer controls logical channels, transport channels and physical channels in response to the establishment, re-establishment and release of radio bearers. If there is a connection (RRC connection) between the RRC of the UE 5 and the RRC of the radio base station module 4, the UE 5 is in the RRC connected mode, otherwise it is in the RRC idle mode.

The above layers are used in both the control plane and the user plane. On the other hand, only in the control plane, UE5 and MME2 are provided with a NAS layer that performs session management, mobility management, and the like higher than the RRC layer. Further, a GTP-U (GPRS (General Packet Radio Service) Tunneling Protocol for User Plane) layer is provided on the user data transmission interface with the EPC module 3 side of the radio base station module 4. The GTP-U layer is for identifying the UE 5 to be connected and the wireless bearer to be used.

Next, FIG. 8 shows downlink channel mapping. Here, the mapping relationship between the logical channel (Downlink Logical Channel), the transport channel (Downlink Transport Channel), and the physical channel (Downlink Physical Channel) is shown. Hereinafter, they will be described in order.
-DTCH (Dedicated Traffic Channel) is an individual logical channel for transmitting data. The DTCH is mapped to a DLSCH (Downlink Shared Channel), which is a transport channel.
-DCCH (Dedicated Control Channel): A logical channel for transmitting individual control information between the UE 5 and the network. The DCCH is used when the UE 5 has an RRC connection with the radio base station module 4. The DCCH is mapped to the DLSCH.
-CCCH (Common Control Channel): A logical channel for transmission control information between the UE 5 and the radio base station module 4. CCCH is used when the UE 5 does not have an RRC connection with the radio base station module 4. CCCH is mapped to DLSCH.
-BCCH (Broadcast Control Channel): A logical channel for system information distribution. BCCH is mapped to BCH (Broadcast Channel) or DLSCH which is a transport channel.
-PCCH (Paging Control Channel): A logical channel for notifying changes in paging information and system information. The PCCH is mapped to a transport channel, PCH (Paging Channel).

The mapping relationship between the transport channel and the physical channel is as follows.
-DLSCH and PCH: Mapped to PDSCH (Physical Downlink Shared Channel). DLSCH supports HARQ, link adaptation, and dynamic resource allocation.
-BCH: Mapped to PBCH (Physical Broadcast Channel).

FIG. 9 shows uplink channel mapping. Similar to FIG. 8, the mapping relationship between the logical channel (Downlink Logical Channel), the transport channel (Downlink Transport Channel), and the physical channel (Downlink Physical Channel) is shown. Hereinafter, they will be described in order.
-CCCH (Common Control Channel): A logical channel used to transmit control information between the UE 5 and the EPC module 3, and is a logical channel used between the EPC module 3 and radio resource control (RRC). Used by UE5 that does not have a connection.
-DCCH (Dedicated Control Channel): A point-to-point bidirectional logical channel used to transmit individual control information between the UE 5 and the EPC module 3. It is a channel. The dedicated control channel DCCH is used by the UE 5 which 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 transferring user information.

-ULSCH (Uplink Shared Channel): HARQ), dynamic adaptive wireless link control, and intermittent transmission (DTX) are supported transport channels.
-RACH (Random Access Channel): A transport channel through which restricted control information is transmitted.

-PUCCH (Physical Uplink Control Channel): Response information (ACK (Acknowledge) / NACK (Negative acknowledge)) for downlink data, downlink radio quality information (CQI: Channel Quality Indicator), and This is a physical channel used to notify the radio base station module 4 of an uplink data transmission request (scheduling request: SR).
-PUSCH (Physical Uplink Shared Channel): A physical channel used for transmitting uplink data.
-PRACH (Physical Random Access Channel): A physical channel mainly used for random access preamble transmission for acquiring transmission timing information (transmission timing command) from the UE 5 to the radio base station module 4. .. Random access preamble transmission is performed in a random access procedure.

As shown in FIG. 9, in the uplink, the transport channel and the physical channel are mapped as follows. The uplink transmit / receive channel ULSCH is mapped to the physical uplink transmit / receive channel PUSCH. The random access channel RACH is mapped to the physical random access channel PRACH. The physical uplink control channel PUCCH is used by the physical channel alone. Further, the common control channel CCCH, the dedicated control channel DCCH, and the dedicated traffic channel DTCH are mapped to the uplink transmission / reception channel ULSCH.

In the downlink of the LTE system, the UE 5 wirelessly connects to the radio base station module 4 by OFDM (Orthogonal Frequency-Division Multiplexing) access (OFDMA). The OFDMA system is characterized as a two-dimensional multiplexed access system in which frequency division multiplexing and time division multiplexing are combined. Specifically, the subcarriers on the frequency axis and the time axis that are orthogonal to each other are divided and allocated to the UE 5, and the subcarriers that are orthogonal to each other on the frequency axis are divided so that the signal of each subcarrier becomes zero (0 point). .. By dividing the subcarriers and assigning them on the frequency axis, one subcarrier can select another subcarrier that is not affected by fading, so that the user is better depending on the wireless environment. There is an advantage that the subcarrier can be used and the radio quality can be maintained.

Then, in the OFDMA method, a resource block (hereinafter, also referred to as RB) defined on a virtual plane extending the frequency axis and the time axis is adopted as a radio resource. As shown in FIG. 10, the RB is defined as a block in which the plane is divided into a matrix at 180 kHz / 0.5 msec, and each resource block RB has 12 adjacent subcarriers at intervals of 15 kHz on the frequency axis and a time axis. Above, one slot of the frame (7 symbols) is included. This RB is assigned to the UE 5 as a set of two adjacent two (1 msec) on the time axis. On the other hand, in the uplink of the LTE system, a resource block RB having the same concept is used as a 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 subcarriers (bandwidth: 15 kHz) on the frequency axis, whereas SC-FDMA is a single carrier system in which division into subcarriers is not performed.

In the wireless communication unit 1 having the above configuration, the integrated control module 9 performs the following functional operations by executing the integrated control firmware 905a.
· Operating environment information acquisition unit based on the (I 2 ^C bus master 907) operating environment information is acquired, determines whether a defined operating environment abnormality has occurred previously (operating environment abnormality determination unit).
-The main unit start-up command is transmitted to the communication main unit only when it is determined that no abnormal operating environment has occurred (main unit start-up command transmission unit).
-When an operating environment abnormality has occurred, an operating environment abnormality notification output is output (operating environment abnormality notification unit).
-When the operating environment abnormality determination unit determines that an operating environment abnormality has occurred after the base station function program and EPC function program are started in the communication main unit, the base station function stored in the base station function program storage unit Instructs the communication main unit to execute the close processing of the program and the EPC function program (EPC communication firmware 305a) stored in the EPC function program storage unit (flash memory 305), and then shuts off the power of the communication main unit (operation). Medium abnormality response processing unit).

The LED 60 of FIG. 2 has a function of the operating environment abnormality notification unit of the present invention, and includes, for example, the one shown in FIG.
-Power supply LED 60A: Indicates the operating state of the power supply switch 65. For example, when the power supply module 22 is in the power receiving state, the power supply LED 60A is turned on when the power switch 65 is turned on and turned off when the power switch 65 is turned off.
-Operating LED 60B: Whether or not the communication main unit (EPC module 3 and wireless base station module 4) receives power and operates in startup (whether or not the EPC communication firmware 305a and the base station communication firmware 405a are activated and executed. ) Is notified. For example, it lights up when it is in the rising operation and turns off when it is not.
-Fan LED60C: Turns on, for example, when there is an abnormality in the cooling fans 14A and 14B, and turns off when there is no abnormality.
-Temperature LED 60D: Turns on, for example, when there is an abnormality in the detection temperature of the temperature sensors 15A and 15B, and turns off when there is no abnormality.
-Battery LED 60E: Turns on, for example, when normal power supply from the battery 21 becomes difficult, such as when the remaining amount of the rechargeable battery 21 becomes less than the threshold value, and turns off when it is not.
-External power supply LED 60F: Turns on when there is an input from the external power supply 26, and turns off when there is no input from the external power supply 26.

Hereinafter, the details of the function realization processing by the integrated control firmware 905a will be described with reference to the flowchart. In FIG. 2, when the user presses the power switch 65 of FIG. 2 while the power is off, the main activation signal is input to the input / output unit 909 of the integrated control computer 900. FIG. 13 shows the processing flow of the activation sequence when the operation of the wireless communication unit 1 is activated. When the main activation signal is detected in S201, it is determined that the power is turned on, and the integrated control computer 900 (in S202). Launch the integrated control firmware 905a). In S203 and notifies the power ON to the ^{I 2} C bus master 907. I ² C bus master 907 transmits a lighting instruction command power LED60A the LED driver 17 by ^{I 2} C communications. LED driver 17 In response to this, the power supply LED 60A is turned on at T203.

Next, in S204, instructs the sensing logging in from the battery controller 24 to the ^{I 2} C bus master 907. I ² C bus master 907 sends a detection log collection command to the battery controller 24 by ^{I 2} C communications. The battery controller 24 receives this and transmits a detection log (operating environment information). ^{I 2} C bus master 907 at step S205 receives the detection logs from the battery controller 24.

Similarly, in S206, it instructs the cooling fan 14A, 14B (the fan operation monitoring device 84A, 84B) and a temperature sensor 15A, 15B (internal temperature monitoring device 85A, 85B) the sensing logging in from the ^{I 2} C bus master 907. I ² C bus master 907 fan operation monitoring device 84A by ^{I 2} C communication, 84B and the internal temperature monitoring device 85A, transmits a detection log collection command to 85B. The fan operation monitoring devices 84A and 84B and the internal temperature monitoring devices 85A and 85B receive this and transmit the detection log (operating environment information), respectively. ^{I 2} C bus master 907 at step S205 receives the fan operation monitoring device 84A, 84B and the internal temperature monitoring device 85A, the 85B.

In S208, the received detection log is analyzed to analyze the presence or absence of an abnormality. FIG. 14 shows the details. In S2081, the detection logs of the first temperature sensor 15A and the second temperature sensor 15B are analyzed. In any of the temperature sensors, "normal" is determined when the detection temperature d is equal to or less than the upper limit value dmax.

In S2082, the detection log analysis of the cooling fans 14A and 14B (fan operation monitoring devices 84A and 84B) is performed. The conditions for determining that the operation of the cooling fans 14A and 14B are 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 (neither is shown). If the rotation speed u is less than umin, it means that the drive motors of the cooling fans 14A and 14B are not rotating normally due to disconnection or other factors, and the cooling inside the portable housing 23 does not proceed sufficiently. There is a risk of high temperature. On the other hand, if the rotation speed u exceeds umax, an excess current may flow through the drive motors of the cooling fans 14A and 14B due to a short circuit or the like, resulting in runaway and failure.
-The temperature Tf is within the normal range (Tf ≤ Tfmax: Tfmax is the maximum allowable 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 temperatures of the cooling fans 14A and 14B, for example, the temperature of the housing surface of the drive motor can be detected by a temperature sensor (not shown).

-The current If is within the normal range (Ifmin ≤ If ≤ Ifmax: Ifmin is the allowable minimum current value, 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 disconnection or other factors, and the cooling inside the portable housing 23 does not proceed sufficiently and the temperature is high. There is a risk of becoming. On the other hand, if the current If exceeds Ifmax, an excess current may flow through the drive motors of the cooling fans 14A and 14B due to a short circuit or the like, resulting in runaway and failure.

It is possible to omit either of the detection of the rotation speed u and the current If, but by detecting both of them, the cause of the abnormality caused in the rotation of the cooling fans 14A and 14B can be more accurately identified. May be beneficial on. For example, when the current If exceeds Ifmax and the rotation speed u is umin, the drive motor is energized, but the rotation of the fan is forcibly hindered by foreign matter or a malfunction of the transmission system. It is possible that the load is on. On the other hand, when the current If is less than Imin and the rotation speed u is less than umin, there is a high possibility of disconnection or power failure. When a plurality of cooling fans are provided as in the present embodiment, it is desirable to perform the same monitoring for each cooling fan.

As a more simple form, to monitor whether the cooling fan 14A, 14B are merely in operation, the cooling fan 14A, the 14B, the fan operation monitoring device 84A, dare as ^{I 2} C device 84B has associated It goes up when it is not necessary to configure it. For example, as shown in FIG. 20, the drive current value SF of the cooling fans 14A and 14B is set as a voltage signal by, for example, a shunt resistor 14R, and this voltage signal is a binary value indicating the operation / stop of the cooling fans 14A and 14B. The detection signal SF may be input to the integrated control module 9 (in this embodiment, it is input to the extended input / output unit 910).

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 Cr is secured at or above the specified lower limit 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). If the battery voltage Vb is less than Vbmin, there is a possibility that the battery voltage is not output due to insufficient battery level, failure of the battery itself, or non-installation. Further, if the battery voltage exceeds Vbmax, there is a possibility that a short circuit from another power source to the battery output circuit has occurred as a problem.
-The battery temperature Tb is equal to or less than the maximum allowable temperature Tbmax. If the battery temperature Tb exceeds Tbmax, there is a possibility that abnormal heat is generated due to an operation outside the specifications of the rechargeable battery such as overcharging or overdischarging.

Then, in S2084, it is confirmed whether or not all the above analysis items are normal. If even one is abnormal, the process proceeds to S2085 to determine the abnormality. On the other hand, if all the analysis items are normal in S2084, the process proceeds to S2086 to determine normality.

Returning to FIG. 13, if there is no abnormality determination in S209 (that is, in the case of normal determination), the IP protocol is followed via the switching hub 11 and the Ethernet bus 32 (LAN, first network) in FIG. 2 to reach S210. Then, a start instruction command (main unit start command) for starting the EPC communication firmware (EPC function program) 305a is transmitted to the EPC computer 300. In response to this, the EPC computer 300 starts the system, the EPC communication firmware 305a starts up, and if the start-up process is completed normally, a start-up completion notification is returned to the integrated control module 9. Further, in S211 the start instruction command (main body start command) for starting the base station communication firmware (base station function program) 405a is similarly transmitted to the wireless base station computer 400. In response to this, the wireless base station computer 400 starts the system, starts up the base station communication firmware 405a, and returns a start-up completion notification to the integrated control module 9. The integrated control module 9 confirms the normal startup of the EPC computer 300 and the wireless base station computer 400 based on whether or not the above-mentioned start-up completion notification is received in S212. Proceeds to S213 if confirmation is successful startup, notifies the normal start ^{I 2} C bus master 907. I ² C bus master 907 receives this, and transmits an LED lighting command indicating "operation" to the LED driver 17. As a result, the LED driver 17 lights the LED 60B of FIG. 19 (T213).

On the other hand, when the abnormality is determined in S209, the processes of S210 and S211 are not executed. That is, the start instruction command (main unit start-up command) is not transmitted to the EPC computer 300 and the wireless base station computer 400, and the start-up process of the EPC communication firmware 305a and the base station communication firmware 405a, that is, the EPC module 3 and the wireless base station module The activation process of the communication main unit including 4 is not performed. Processing on behalf of which the process proceeds to S214, and notifies the abnormality to the ^{I 2} C bus master 907. I ² C bus master 907 receives this, and transmits an LED lighting command indicating "abnormal" in the LED driver 17. Specifically, the type of the abnormality occurred device in the abnormality analysis process of FIG. 14 (temperature sensor, a cooling fan and battery) and notifies the ^{I 2} C bus master 907, ^{I 2} C bus master 907 to LED driver 17, the abnormality occurrence Send a command to turn on the LED corresponding to the device.

As a result, for example, when (one or a plurality of) the above-mentioned abnormalities occur in at least one of the cooling fans 14A and 14B, the LED 60C in FIG. 19 lights up. Further, when an abnormality occurs in the detection temperature of at least one of the temperature sensors 15A and 15B, the LED 60D lights up. Further, when the battery controller 24 detects (one or more) the above-mentioned abnormality, the LED 60E in FIG. 19 lights up. If there are a plurality of devices in which an abnormality has occurred, a plurality of corresponding LEDs are turned on at the same time. On the other hand, when the above abnormality occurs, the LED 60B indicating "operation" is turned off. The details of the abnormality occurrence status (abnormality type and occurrence time for each device, etc.) can be described, for example, by GUI (Graphic User Interface) to the external PC 911 connected to the central control module 9 in FIG. 2 via LAN or the UE 5 connected to WiFi. It may be configured so that it can be output by such means.

In the method of the above embodiment, if even one abnormality occurs in the operating environment of the communication main body, the start-up process itself of the communication firmware of the EPC module 3 and the wireless base station module 4 is postponed. For example, if the temperature inside the portable housing 23 rises and the detection temperatures of the temperature sensors 15A and 15B become abnormal, the probability that the operation of the EPC computer 300 or the wireless base station computer 400 becomes unstable increases, and the radio waves become wireless. The base station module 4 and the EPC module 3 may malfunction or operate as a radio wave interference source of another wireless system. However, the above-mentioned problems can be effectively prevented by grasping the operating environment abnormality including the internal temperature abnormality at the time of starting the wireless communication unit and preventing the communication main body from starting.

On the other hand, even if the detection temperatures of the temperature sensors 15A and 15B do not indicate an abnormality, if an abnormality such as a stop occurs in the cooling fans 14A and 14B, the cooling inside the housing will not proceed, so eventually the temperature will become abnormal. It is inevitable that they will be connected and cause similar problems. Therefore, as described above, the internal temperature information in the portable housing 23 as well as the drive state information of the cooling fan (cooling device) are acquired together, and when the wireless communication unit 1 is started, an abnormality is grasped and the communication main body is started. By preventing the above-mentioned problems, the above-mentioned problems can be prevented more effectively.

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 contents can be rewritten, the setting parameters of the setting parameters are set during operation. Some stored contents may be changed, including rewriting. Therefore, the occurrence of a temperature abnormality may lead to the destruction of a part of the software data due to the runaway of the program or the like. However, by adopting the above method, it is possible to prevent such destruction of software data from occurring. In particular, in the above configuration in which the EPC computer 300 or the wireless base station computer 400 is collectively started by one-push operation of the power switch 65, a function of detecting an abnormality and appropriately stopping the start-up is provided. The communication firmwares 305a and 405a of both computers can be extremely effectively protected from runaway / destruction.

Next, in the method of the above embodiment, the state of the rechargeable battery 21 by the battery controller 24 is also acquired as operating environment information, and if an abnormality occurs, the communication firmware of the EPC module 3 and the wireless base station module 4 of the communication main unit is obtained. Startup process is blocked. Specifically, regardless of the detection temperature of the temperature sensors 15A and 15B and the presence or absence of an abnormality in the cooling fans 14A and 14B, the startup process of the communication firmware is prevented when a battery abnormality is detected. It has become.

EPC communication firmware 305a (EPC function program) and base station communication firmware 405a (base) in an environment where the wireless communication unit 1 is operated by a battery, for example, in a state where normal power supply from the battery is not possible due to insufficient remaining amount or the like. When the station function program) is about to start up, the software data may be destroyed by shutting off the power while the program is running. Therefore, when a battery abnormality is detected, the defect can be effectively prevented by blocking the start-up process of the communication firmware.

In particular, when the received voltage information (power receiving state information) indicated by the detection log of the external voltage monitoring unit 16 in FIG. 4 does not normally receive the external power supply voltage (for example, a state indicating approximately 0V), the external power supply Since the voltage cannot be used as a backup, it is particularly desirable to avoid the process of starting up the communication firmware of the communication main unit when a battery abnormality is detected. In this case, when the external power supply voltage is being received, even if a battery abnormality is detected, it is possible to configure the communication main unit to execute the startup processing of the communication firmware while using the external power supply voltage. It is possible.

On the other hand, even when the external power supply voltage is normally received, it can be configured to avoid the start-up process of the communication firmware of the communication main body when a battery abnormality is detected. When the communication firmware startup process of the communication main 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 failure, etc., the communication firmware is said to have a battery error. It becomes impossible to secure the power supply voltage for continuing the start-up process, and there is a possibility that the above-mentioned software data may be destroyed. Therefore, by configuring as described above, it is possible to protect the software data from destruction even in the event of a power failure during the communication firmware startup process.

Next, FIG. 15 shows the termination sequence of the wireless communication unit 1 in the normal state by the integrated control firmware 905a. In S401, when the power switch 65 of FIG. 2 is pressed while the wireless communication unit 1 is running, the process proceeds to S402 and the termination process is executed. FIG. 16 shows the details of the termination process, and follows the IP protocol via the switching hub 11 and the Ethernet bus 32 (LAN, first network) of FIG. 2, and EPC communication firmware is sent to the EPC computer 300 in S4021. (EPC function program) Sends an end instruction command to end (close) the 305a. In response to this, the EPC computer 300 shifts to the close process, closes the EPC communication firmware 305a, and returns a completion completion notification to the overall control module 9 if the end process is completed normally. Further, in S4022, an end instruction command for terminating (closing) the base station communication firmware (base station function program) 405a is similarly transmitted to the wireless base station computer 400. In response to this, the wireless base station computer 400 shifts to the termination (close) process, closes the base station communication firmware 405a, and returns a termination completion notification to the integrated control module 9 if the termination process is completed normally. The integrated control module 9 confirms the normal termination of the EPC computer 300 and the radio base station computer 400 based on the presence or absence of the reception of the termination notification in S4023. Advances to S4024 if confirmation is successful, notifies a normal end to the ^{I 2} C bus master 907. I ² C bus master 907 receives this, and 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 supply) and 60B (operation) in FIG. Then, the processing of the integrated control module 9 proceeds to S4025, and after the termination processing of the integrated control computer is executed, the power is cut off.

On the other hand, if it is not normally completed in S4023 (i.e., if the abnormality determination), the flow proceeds to S4026, and notifies the abnormality to the ^{I 2} C bus master 907. ^{I 2} C bus master 907 at T4026 receives this, LEDs 60a of FIG. 19 (power supply) is lit continuously, 60B (operating) performs processing to turn off. By continuing to light the LED 60A, the user can know that the termination process of the communication main body could not be completed normally. In this case, for example, the forced termination process can be executed by pressing and holding the power switch 65 for a long time.

Next, FIG. 17 shows a flow of processing by the integrated control firmware 905a when each communication firmware (EPC communication firmware and base station communication firmware) of the communication main unit starts up normally and then an abnormality occurs during operation. It shows. This process is repeatedly executed at predetermined time intervals, for example, by timer processing or the like. In S501, the cooling fan 14A, 14B (the fan operation monitoring device 84A, 84B), the temperature sensor 15A, 15B (internal temperature monitoring device 85A, 85B) and a sensing logging in from the battery controller 24 instructs the ^{I 2} C bus master 907 , it receives a detection log of each device from the ^{I 2} C bus master 907 at S502. The step is the same as the process leading to S204 to S207 in FIG. Then, in S503, the same abnormality analysis processing as in FIG. 14 is performed. Then, the termination process of FIG. 16 is executed only when the abnormality is determined in S505 (S506). In this way, if an operating environment abnormality occurs in the communication main unit after the base station communication firmware 405a (base station function program) and EPC communication firmware 305a (EPC function program) are started, both firmwares are terminated. Since the power is cut off after the software is damaged, the software data can be protected from destruction even in the above-mentioned abnormality.

FIG. 18 shows a flow of processing by the integrated control firmware 905a for switching between the external power supply and the battery power supply for the power supply module 22. This process is also repeatedly executed at predetermined time intervals. In S601, an instruction to acquire the detection logs according to receiving voltage from an external voltage monitoring unit 16 (FIG. 4) to the ^{I 2} C bus master 907. In S602, it receives the detection logs from ^{I 2} C bus master 907. In S603, if the detected log indicates through the power receiving proceeds to S604, and notifies that there is an external power receiving the ^{I 2} C bus master 907. I ² C bus master 907 receives this, and transmits the LED lighting command to the LED driver 17 indicating "external power supply receiving." As a result, the LED driver 17 lights the LED 60F (external power supply) of FIG. 19 (T604).

On the other hand, if the detected log in step S603 does not indicate the in receiving proceeds to S606, and notifies the no external power receiving the ^{I 2} C bus master 907. I ² C bus master 907 receives this, and transmits the LED off command indicating "external power receiving" the LED driver 17. As a result, the LED driver 17 turns off the LED 60F (external power supply) of FIG. 19 (T606). Then, the process proceeds to S605, and the power supply is switched to the rechargeable battery 21.

Although the embodiments of the present invention have been described above, the present invention is merely an example, and the present invention is not limited thereto.

1 Wireless communication unit 2 MME
3 EPC module 4 Wireless base station module 5 UE (mobile terminal)
6 S-GW
7 P-GW
8 Router 9 Integrated 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 supply 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 Wireless bearer 65 Power switch 66 Control switch 60 LED (Operating environment abnormality notification unit)
84A, 84B Fan operation monitoring device (cooling device drive status 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 unit 900 Control computer 901 CPU
902 RAM
903 mask ROM
904 Ethernet interface (first interface, main unit startup command transmitter)
905 Flash memory 905a Integrated control firmware (operating environment abnormality judgment unit, operating abnormality response processing unit)
906 internal bus 907 ^{I 2} C bus master (second interface, the master node)
908 WiFi module 909 Input / output section (main activation signal reception section)
911 external PC
912 Wireless communication unit

Claims (13)

A wireless communication unit that performs wireless communication with a mobile terminal based on the 3GPP specifications, a base station function program storage unit, and a base station function stored in the base station function program storage unit by receiving a main unit start-up command. EPC (Evolved Packet Core) function program storage unit connected to the radio base station module by wire and a base station module including a base station computer that launches and executes a program to control wireless communication with respect to the radio communication unit. With the EPC computer that starts and executes the EPC function program stored in the EPC function program storage unit by receiving the main body start-up command and controls the upper network for the radio base station module based on the execution. The communication main unit including the EPC module equipped with
A power supply module that supplies an operating voltage to the communication main unit,
A portable housing that integrally houses the communication body and the power supply module,
The main activation signal receiving unit that receives the input of the main activation signal and the operating environment information of the communication main unit in the portable housing include the internal temperature information of the portable housing in response to the reception of the main activation signal. An operating environment abnormality determination unit that determines whether or not an abnormality has occurred in the operating environment of the communication main unit based on the acquired operating environment information, and an operating environment abnormality have occurred. A main body start-up command transmission unit that transmits the main body start-up command to the communication main body unit only when the communication main unit is not used, and an operating environment abnormality notification unit that outputs an operating environment abnormality notification output when the operating environment abnormality has occurred. Integrated control module equipped with
A wireless communication unit characterized by being equipped with. The wireless communication unit according to claim 1, wherein the main activation signal is input to the main activation signal receiving unit in accordance with an operation of one predetermined activation switch. A cooling device for cooling the internal space of the portable housing is provided.
The wireless communication unit according to claim 1 or 2, wherein the operating environment information acquisition unit acquires the operating environment information as further including drive state information of the cooling device. In the operating environment abnormality determination unit of the integrated control module, whether the drive state information of the cooling device indicates an operation abnormality of the cooling device or whether the internal temperature information of the portable housing exceeds the limit temperature. The wireless communication unit according to claim 3, wherein it is determined that an operating environment abnormality has occurred when at least one of them is satisfied. A rechargeable battery for supplying a battery voltage is provided to the power supply module, and the operating environment information acquisition unit acquires the operating environment information as further including the charged state of the rechargeable battery and the battery state information indicating the operating state. The wireless communication unit according to any one of claims 1 to 4. The wireless communication unit according to claim 5, wherein the operating environment abnormality determination unit determines that the operating environment abnormality has occurred when the remaining battery level reflected in the battery status information is less than the threshold value. The power supply module is provided with an external power supply voltage power receiving unit that receives an external power supply voltage, and the operating environment information acquisition unit acquires the operating environment information as further including power receiving state information of the external power supply voltage power receiving unit. The operating environment abnormality determination unit indicates that the power receiving status information does not receive the external power supply voltage, and the remaining battery level reflected in the battery status information is less than the threshold value. The wireless communication unit according to claim 6, wherein it is determined that the operating environment abnormality has occurred in this case. When the operating environment abnormality determination unit determines that the operating environment abnormality has occurred after the base station function program and the EPC function program have been started up in the communication main unit, the integrated control module has the base. The communication main unit is instructed to execute the closing process of the base station function program stored in the station function program storage unit and the EPC function program stored in the EPC function program storage unit, and then the power supply of the communication main unit is supplied. The wireless communication unit according to any one of claims 1 to 7, further comprising an operating abnormality handling processing unit that performs shutoff processing. A plurality of operating environment information acquisition nodes including an internal temperature information acquisition node for acquiring the internal temperature information of the portable housing are provided.
The integrated control module includes a first network interface to which the base station computer and the EPC computer of the communication main unit are connected via a first network, and a second network in which a plurality of the operating environment information acquisition nodes are connected. The operating environment information acquisition unit communicates and acquires the operating environment information from the operating environment information acquisition node via the second network interface. The wireless communication according to any one of claims 1 to 8, wherein the main body start-up command transmitting unit transmits the main body start-up command to the communication main body unit via the first network interface. unit. The wireless communication unit according to claim 9, wherein the internal temperature information acquisition node acquires the internal temperature information from a temperature sensor provided in the portable housing. The second network connects a plurality of the operating environment information acquisition nodes as slave nodes to the master node included in the second network interface, and the operating environment information acquisition unit is the acquisition target information. The acquisition target information request destination notification unit for notifying the request destination to the master node is provided, and the master node sends an information request command to the second network in the form of addressing the slave node to be the request destination, and the above Among the slave nodes, the node corresponding to the designated address acquires the information request command, and at the same time, transmits the acquisition target information indicated by the information request command to the master node via the second network. The wireless communication unit according to claim 9 or 10. It said first network is a local area network, the second wireless communication unit of claim 11, wherein the network is an I ^{2 C} network. A module support plate is provided inside the portable housing, and one main surface of the module support plate is defined as a module mounting surface, and the module support plate is horizontally arranged so that the module mounting surface is on the upper side. When the direction in which the module rises vertically from the module mounting surface is defined as the vertical direction,
In the first direction defined along the module mounting surface, an airflow inlet is formed on the side wall portion on the first end side in the first direction of the portable housing, while the side wall portion on the second end side is formed. When the airflow outlet is formed, a cooling fan is attached to the airflow inlet, and the outside air is taken in from the airflow inlet by the operation of the cooling fan, and the outside air is used as cooling air to move the inside of the portable housing in the first direction. After being distributed, it is discharged from the airflow outlet.
On the module mounting surface of the module support plate, a wireless drive system module group including the wireless base station module and the power supply module is located on the side close to the airflow inlet in the flow direction of the cooling air, and is located on the side close to the airflow outlet. A group of control system modules including the EPC module and the integrated control module are arranged respectively, and as a temperature sensor, the first temperature sensor is in the occupied space of the wireless drive system module group, and the second temperature sensor controls the control system. The wireless communication unit according to any one of claims 1 to 12, respectively, which is arranged in the occupied space of the system module group.

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