JP2019075734A - Base station device and radio communication system - Google Patents

Abstract

To provide a radio access service while reducing a load on maintenance.SOLUTION: A radio station device for high place installation 10 of a base station device for high place installation 100 includes: a flight unit capable of three-dimensionally moving in a space; a first attachment/detachment unit capable of attaching to and detaching from a fixed installation power feeding unit 20; a first radio communication unit for communicating with a terminal device by radio; a second radio communication unit for transmitting and receiving signals transmitted and received by the terminal device via the first radio communication unit by using a radio entrance base station device and a radio entrance line connected with a network; and a power reception unit for receiving power supply from a fixed installation unit in the state of the first attachment/detachment unit being connected with the fixed installation power feeding unit 20. The fixed installation power feeding unit 20 includes: a second attachment/detachment unit capable of attaching to and detaching from the radio station device for high place installation 10; and a power feeding unit for supplying power to the radio station device for high place installation 10 in the state of the second attachment/detachment unit being connected with the radio station device for high place installation 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a base station apparatus and a wireless communication system.

  Currently, smart mobile communication terminals such as smart phones are explosively widespread. With regard to mobile phones, the third generation mobile communication has been shifted to fourth generation mobile communication, and research and development on fifth generation mobile communication (generally called “5G”) is currently underway. One of the studies being conducted regarding this 5G is the use of macro cells and small cells.

  In conventional mobile phones, one service area is set to a radius of about several kilometers, and one base station device covers the area of this macro cell. However, a very large number of users exist in such a macro cell. Because the overall limited system capacity is shared by each user, the throughput per individual user is reduced when accommodating a large number of users.

  In order to avoid such a decrease in throughput, a technology has been developed for setting small cells, which are very small service areas with a radius of several tens of meters, in densely populated areas where traffic is concentrated. In this technology, small cells are used to offload spotted traffic to the network without going through macro cells. Here, it is assumed that terminals capable of simultaneously and concurrently using the communication capability in the small cell and the communication capability in the macro cell. By using such a terminal device, user data is accommodated on the small cell side while exchanging information using the macro cell for control information. This makes it possible to make the most of the benefits of macro cells and small cells.

  In the 5G mentioned above, 10 Gbit / s (gigabits per second) or more is set as the target value of the transmission speed, and efficient offload of traffic is realized by performing the same large-capacity communication with this small cell. There is a need to. In the macro cell, it is premised to use a low frequency microwave band to allow long distance propagation. However, in view of the current state of microwave bands that are already depleted in frequency resources, it is assumed that the use of relatively high-frequency quasi-millimeter or millimeter wave bands is assumed in small cells that assume communication at relatively short distances. It is done. The characteristic of this high frequency band is that the propagation attenuation increases in inverse proportion to the square of the frequency. Therefore, the small cell base station is installed relatively close to the user terminal.

  It is assumed that the installation place of such a small cell base station is installed in a relatively high place such as a building wall or a streetlight in a downtown where many people such as Shibuya and Shinjuku gather. If a large number of small cell base stations are installed, users can be efficiently accommodated by dividing them into smaller areas, so the offload effect is high. Many people in these downtown areas are pedestrians. Since the use of a smartphone or the like is avoided during movement by walking, the number of users performing communication is limited to a part of pedestrians and the like. On the other hand, in places such as stadiums and trade fairs, there is a high need for communication, and furthermore, many people are in a quasi-stationary state. For this reason, the substantial number of users or the user density is very high.

  As an example of wireless access in a stadium, Wi-Fi (registered trademark) services are provided at Seibu Dome in Saitama and the like. Here, directional antennas are attached to a plurality of wireless LAN access points. Then, while the service area divided for each directivity is frequency-sorted with a plurality of frequency channels, a service is provided by covering the audience seat on the surface. This service is also a service using the current commercially available system, unlike the service aiming for 5G as described above. From this, the individual service areas divided by the directional antenna were set relatively wide, and it was possible to cope with the relatively rough area design while allowing the mutual service areas to overlap. . For this reason, the installation point of this access point is a wall surface near the top of the stadium's spectator seats, etc., and it is high enough (for example, 3 to 4 m) that the pedestrians do not block the view to the service area. It was good if it was installed in Also, at present, applications that actively use communication services in stadiums are not in widespread use, and the level of Internet browsing is the main situation.

  However, in the 5G era, it is expected that the transmission capacity required by each user will increase, and furthermore, many applications used in stadiums etc. will be explored. For example, a replay video of a game such as soccer or baseball or a view from different directions may be optionally used. In the case where these are viewed on demand for each user, it is necessary to divide the stadium stand into small small cells or pico cells, and expand the service area on the surface while performing frequency segregation of each pico cell.

  In order to divide such pico cells with directional antennas, it can not be coped with by installing it on the wall near the top of the stadium seats, as in the above-mentioned Seibu Dome service. This is because the angle difference between the direction of the bottom of the audience seat and the direction of the top audience seat is relatively narrow as viewed from the access point installed on the wall near the top of the stadium seating, and the directivity of the antenna It is difficult to ensure the resolution to separate the service area. Furthermore, it is expected that the user is facing the ground side of the stadium and is almost certainly out of sight for access points located in the back direction. Even in a wireless LAN using a microwave band with a low frequency, under an environment where human body shielding is premised, it is impossible to design a clean picocell like a line-of-sight environment. Furthermore, in the case of using a high frequency band such as a millimeter wave, the wraparound of radio waves due to diffraction can not be expected at all, and the line margin due to human body shielding becomes 10 dB or more, which is disadvantageous in line design.

  As another viewpoint, in 5G small cell base stations, application of Massive MIMO technology using an ultra-multielement antenna is considered. In Massive MIMO technology, a large number of antenna elements are mounted on both the base station apparatus and the terminal station apparatus, directivity is formed using the antenna elements mutually, and signal-to-interference and noise power are ensured by securing directivity gain. By improving the ratio SINR (Signal to Interference and Noise Ratio), it becomes possible to perform parallel transmission while suppressing adjacent interference in adjacent service areas. The directivity control using these multiple antenna elements enables small cell or pico cell type service to finely divide the service area.

  However, when performing this beam forming, it is not installed on the wall near the top of the audience seat of the stadium like the above-mentioned Seibu Dome example, but the prospect of the whole service area is secured and furthermore every picocell It is preferable that the device be installed in an environment where a wide positional difference such as elevation angle and horizontal angle can be secured. Specifically, it is preferably installed near the ceiling above the audience seat. In fact, taking the dome stadium or the New Tokyo International Stadium as an example, many roofs are installed above the audience seats, and base station equipment and access points should be installed on such roof structures. Is possible. The same applies to indoors such as a trade fair, for example. Ideally, a base station apparatus should be installed at a high place such as a ceiling to illuminate the lower area.

  This is also beneficial from the perspective of Massive MIMO technology. For example, according to Non-Patent Document 1, in the viewpoint of utilization of spatial freedom of Massive MIMO technology, irradiation from above can effectively utilize spatial freedom more than irradiation from the horizontal direction. It is shown to be effective in terms of securing multiplexing and SINR. A more detailed situation is explained using FIG. 4 and FIG.

  FIG. 4 is a diagram showing an environment where a base station apparatus is installed at a relatively low location and beam irradiation is performed in the horizontal direction, and FIG. 5 is a case where the base station apparatus is installed at a high location and beam is applied from above Is a diagram showing the environment of In these figures, 1-a to 1-g are small cells (or pico cells) in a service area, 2-a to 2-g are terminal stations, 3 and 4 are Massive MIMO base stations, and 5 is a human body. There is.

  For example, when focusing on the small cells 1-g, 1-a, and 1-d in FIG. 4, these small cells 1-g, 1-a, and 1-d are substantially on a straight line when viewed from the Massive MIMO base station 3. Lined up. For this reason, when trying to separate communication between the terminal stations 2-g, 2-a and 2-d in each of the small cells 1-g, 1-a and 1-d by directivity control, the elevation angle Although signal separation must be performed with an angular difference in direction, originally it is an environment that is close to a horizontal direction and difficult to have an elevation angle difference, so it is an environment where user separation by directivity control is difficult. Furthermore, for example, in consideration of shielding by the human body 5, in service to the small cells 1-d and 1-a at a distance, the line gain is lowered due to the shielding of the human body and the reflected wave is actively used. Therefore, the time variation of the channel also becomes large.

  On the other hand, in the case of irradiating the beam from above as shown in FIG. 5, since the angle difference in the horizontal direction and the elevation direction is uniformly present, signal separation between small cells by directivity control becomes easy to perform. Furthermore, the power of the direct wave component is relatively high compared to the reflected wave component, and the time variation of the channel is also relatively low. As generally viewed, the influence of the human body 5 is not affected, and the line gain advantage is also high. Of course, by installing at a high place, the propagation distance may be long, but in Fig. 4 the figure by attenuation of propagation distance considering that the farthest small cell 1-d etc. becomes a certain distance. The degree of environmental disadvantage of 5 is limited.

  As also shown in Non-Patent Document 1, for example, when the number of antenna elements of Massive MIMO base stations 3 and 4 is 100, the channel vector with each antenna of terminal stations 2-a to 2-g appears to be Exist in a 100-dimensional space. However, in practice, not all subspaces can be used in a complete 100-dimensional space, but channel vectors exist in some subspaces (for example, 50-dimensional subspaces). The larger the effective width of this subspace, the smaller the correlation of the channel can be, which is suitable for space multiplex transmission etc. However, the effective width of this subspace (or the effective subspace) The dimension of (1) is wider in the case of irradiating the beam from above as shown in FIG.

  Combining these viewpoints, wireless access at stadiums and trade fairs in the world of 5G requires that base stations and access points be actively installed and used at high places such as ceilings. .

Atsushi Ota, Akihiko Iwakuni, Itsuki Maruta, Hirofumi Shirato, Takuto Arai, Masataka Iizuka, "A Study on Effective Utilization of Spatial Degrees of Freedom for Suppression of User-to-User Interference in Multi-user Massive MIMO under Channel-time Fluctuation Environment", IEICE, IEICE technical report, vol. 115, no. 113, RCS 2015-54, p. 49-54, June 2015

  For wireless access at stadiums and trade fair grounds in the 5G world described above, it is expected to install base station devices and access points in high places such as ceilings. However, at such a high place, maintenance of the device to be installed becomes a major issue.

  Also, since a large volume of transmission is required, a very high definition device is required. If a failure occurs in any of the optical termination equipment to which the optical fiber is connected, the interface equipment of 10 Gbit / s or more, the 5G small cell base station equipment, etc., it is installed at a high place, so it is easy to replace it Have difficulty. For example, in the case of lighting, etc., in order to illuminate the entire stadium with a huge number of light bulbs, installing a number of light bulbs with a slight margin allows serviceability to be impaired even if a few light bulbs have troubles Will not come out. On the other hand, in the case of a base station apparatus or an access point, since the service area covered by each apparatus is determined by design, the user in the service area covered by the failed base station apparatus can not receive service. there is a possibility. Therefore, there is a need for a system that can be quickly maintained if any failure occurs in a base station apparatus installed at a very high place such as a stadium or a ceiling of a trade fair ground.

  The connector for connecting the optical fiber and the optical termination device is not loose connector connection but manually with a structure with little play, in order to ensure transmission of optical signals between the optical fibers connected by the connector. In general, it is a structure that can not be easily removed once it is connected. For this reason, the attachment or detachment by remote control is not easy.

  In view of the above circumstances, the present invention aims to provide a base station apparatus and a wireless communication system capable of providing a wireless access service by reducing the maintenance load.

  One aspect of the present invention is a base station apparatus for providing a radio access service to a terminal apparatus in a predetermined area, wherein the base station apparatus provides a radio access for the radio access service to the terminal apparatus. The radio access base station apparatus comprises: an access base station apparatus; and a fixed installation unit attachable to and detachable from the radio access base station apparatus, wherein the radio access base station apparatus comprises: a flight unit capable of three-dimensionally moving a space; To a network, a signal transmitted / received by the terminal device via the first detachable portion capable of coupling and decoupling, a first wireless communication portion wirelessly communicating with the terminal device, and the first wireless communication portion A second wireless communication unit that transmits and receives using a wireless entrance base station apparatus, which is another wireless station apparatus to be connected, using a wireless entrance line, and the first detachable unit are connected to the fixed installation unit And a power receiving unit for receiving power supply from the fixed installation unit, wherein the fixed installation unit is a second detachable unit capable of being connected to and disconnected from the wireless access base station apparatus; And a feeding unit that supplies power to the wireless access base station apparatus in a state where the attaching / detaching unit is connected to the wireless access base station apparatus.

  One aspect of the present invention is the base station apparatus described above, wherein one or both of the first attachment / detachment part and the second attachment / detachment part are in the connection state and the release state by the upward buoyancy obtained by the flight part. Have a mechanism to switch between

  One aspect of the present invention is a wireless communication system for providing a wireless access service to a terminal device in a predetermined area, wherein the wireless communication system provides a wireless access for the wireless access service to the terminal device. An access base station apparatus, a fixed installation unit attachable to and detachable from the wireless access base station apparatus, and a wireless entrance base station apparatus connected to a network, wherein the wireless access base station apparatus moves in a three-dimensional space Via a first wireless communication unit that wirelessly communicates with the terminal device, and a first wireless communication unit that wirelessly communicates with the terminal device; A second wireless communication unit that transmits and receives signals transmitted and received by the terminal apparatus to and from the wireless entrance base station apparatus using a wireless entrance line; And a power receiving unit for receiving power supply from the fixed installation unit in a state of being connected to the fixed installation unit, and the fixed installation unit is capable of performing connection and disconnection with the radio access base station apparatus. And a power feeding unit for supplying power to the wireless access base station device in a state where the second detachable portion is connected to the wireless access base station device, the wireless entrance base station device comprising: A third wireless communication unit configured to wirelessly communicate with the wireless access base station apparatus using the entrance line is provided.

  The present invention makes it possible to reduce the maintenance load and provide a wireless access service.

It is a figure which shows the outline | summary of the base station apparatus for high places installation in embodiment of this invention. It is sectional drawing of the base station apparatus for height installation in the embodiment. It is a figure which shows the outline | summary of the communication service which the radio | wireless communications system in the embodiment provides. It is a figure which shows the environment in the case of installing a base station apparatus in a comparatively low place and irradiating a beam from a horizontal direction. It is a figure which shows the environment in case a base station apparatus is installed in a high place and a beam is irradiated from upper direction.

  Embodiments of the present invention will be described in detail with reference to the drawings. As a basic idea, all functions such as optical termination function to which optical fiber which is high definition function in base station equipment is connected, interface function of 10 Gbit / s or more, base station function etc. are all fixed installation at high places Rather, only the power supply function with a relatively low possibility of failure is fixedly installed at high places (hereinafter referred to as “fixed power supply unit”). The functions other than the fixed installation power supply unit and the power reception function are realized in a detachable state with the fixed installation power supply unit at a high place, and the detachment is realized using an unmanned flight function such as a drone. In the case of using an optical fiber to provide the entrance line to the base station apparatus, since it is difficult to securely attach and detach the connector by remote control, the supply of the entrance line by the optical fiber is omitted here, and the entrance line is wirelessly connected. I will provide a. Supply of power is realized by contact-type power supply (for example, a connection mechanism between the power cable of the “electric pot” and the pot body) using a magnet at the contacts, or power supply by non-contact power transmission. make it easier.

  The specific configuration is shown below using the drawings. FIG. 1 is a diagram showing an outline of the high-allocation base station apparatus 100 according to an embodiment of the present invention. In the figure, the base station for high-altitude installation base station 100 includes a radio station installation for high-altitude installation 10 and a fixed installation power supply unit 20. The radio station apparatus 10 for high place installation includes the radio unit 11, the unmanned flight function control unit 12, the fixed and power receiving unit 13, the detachable guide units 14-1 to 14-4, and the rotor units 15-1 to 15-. 4 and a camera unit 16. The fixed installation power supply unit 20 includes a ceiling fixed plate 21, a fixing and feeding unit 22, and detachable guide units 23-1 to 23-4.

  The radio station apparatus 10 for installation at high places shown in the figure obtains buoyancy by the rotor units 15-1 to 15-4 controlled by the unmanned flight function control unit 12, and unmanned in any direction in the vertical and horizontal directions. Fly in space and can move in three dimensions. On the other hand, the fixedly installed power supply unit 20 is fixedly installed at a high place such as a ceiling, and a commercial power supply etc. is connected at the time of installation. When the high-altitude installation radio station apparatus 10 is installed at a high place, the unmanned flight function control unit 12 is remotely controlled by a radio control unit (not shown). The radio control unit wirelessly transmits a control signal according to a user operation or the like to control the moving direction of the radio station device for high places installation 10 and, for example, a camera unit mounted on the radio station device for high places installation 10 It may have a function such as wirelessly receiving and displaying the video shot by the radio control 16 at the radio control operation unit. By checking the image from the camera unit 16 (and checking by direct visual observation), the radio station apparatus 10 for high places is brought close to the fixed installation power supply unit 20 so that the positional relationship can be appropriately fixed. .

  The installation / detachment guides 14-1 to 14-4 and the installation / removal guide 23-1 can be fixed so that the high-altitude installation radio station apparatus 10 and the fixed installation power supply unit 20 can be fixed respectively in an appropriate positional relationship. To 23-4. In this figure, the removable guide portions 14-1 to 14-4 of the high-place setting radio station device 10 have a conical shape, and the removable guide portions 23-1 to 23-4 of the fixedly installed power supply portion 20 Conversely, a conical space is secured inside the cylindrical shape. The buoyancy of the rotor units 15-1 to 15-4 of the radio station apparatus 10 for high place installation in a state where the positioning of the mounting and dismounting guides 14-1 to 14-4 and the mounting and dismounting guides 23-1 to 23-4 is generally performed. When it is raised, it is guided to an accurate place with high accuracy by meshing of the conical detachable guides 14-1 to 14-4 and the detachable guides 23-1 to 23-4.

  The fixed installation power supply unit 20 includes the fixed and power feeding unit 22, and when the high-allocation radio station apparatus 10 is guided to an appropriate place, the fixed and power feeding unit 22 is connected to the fixed and power receiving unit 13. The radio station device 10 for high place installation is fixed so as not to drop out, and power is supplied from the fixing and power feeding unit 22 to the fixing and power receiving unit 13. The power received by the fixed and power receiving unit 13 is supplied to each functional unit, such as the wireless unit 11, operated by the power in the high-allocation radio station apparatus 10. The radio control equipment 10 for high places does not come down in a state where the buoyancy is lowered by the operation from the radio control unit, it is confirmed that the fixation for the radio installation 10 for high places is completed. The control unit instructs the unmanned flight function control unit 12 to stop the rotor units 15-1 to 15-4. The rotor units 15-1 to 15-4 are always used in a stopped state during operation of the radio station apparatus 10 for high places.

  Next, when performing maintenance on the radio station device 10 for installation in high places, the radio control unit instructs the unmanned flight function control unit 12 to rotate the rotor units 15-1 to 15-4 for installation in high places The radio station apparatus 10 is given buoyancy. The fixing and power feeding unit 22 and the fixing and power receiving unit 13 are initially in a connected state, but when the fixing and power receiving unit 13 is in a fixed state by pushing power feeding unit 22 due to buoyancy by a push-cancel type coupling mechanism or the like. The connection is released. In this state, when the radio control unit instructs the unmanned flight function control unit 12 to reduce the buoyancy by the rotor units 15-1 to 15-4, the fixing and power feeding unit 22 and the fixing and power receiving unit 13 are separated, and the height is installed The radio station apparatus 10 can fly in a completely free state, and is guided and accommodated on the ground by an operation from the radio control unit. Although not shown in the figure, in order to utilize the unmanned flight function of the drone without receiving power via the fixed and power receiving unit 13, naturally the battery is mounted on the radio station apparatus 10 for high places installation It also has a function of charging the battery with electricity received via the fixed and power receiving unit 13 during normal operation. The electric power charged in the battery is supplied to each functional unit operated by electric power in the high-place installation radio station device 10 or to at least a functional unit related to the unmanned flight function among the respective functional units.

  FIG. 2 is a cross-sectional view of the high-allocation base station apparatus 100 according to the embodiment of the present invention. The meaning of the cross-sectional view herein is not to represent the cross-section in a predetermined plane in a strict sense, but should be interpreted as a drawing showing the entire structure. The wireless unit 11, the unmanned flight function control unit 12, the detachable guide units 14-a to 14-b, the rotor units 15-a to 15-b, the camera unit 16, the fixing units 17-a to 17-b, and The power receiving unit 18 is included in the high-allocation base station apparatus 100. The ceiling fixed plate 21, the detachable guide portions 23-a to 23-b, the power feeding portion 24, the fixing claws 25-a to 25-b, the hinge portions 26-a to 26-b, and the push / cancel fixed portion 27-a to 27-b are provided in the fixed installation power supply unit 20. Although -a to b in FIG. 1 have been described using serial numbers such as -1 to 4 in FIG. 1, since they are described here in cross section, any one of the numbers such as -1 to 4 is I understand that it corresponds.

  As described with reference to FIG. 1, the inside of the detachable guides 23-a to 23-b has a conical cavity, and the centers of the detachable guides 14-a to 14-b and the detachable guides 23-a to 23-b. Even if the axes do not coincide exactly, if the removable guide portions 14-a to 14-b can be aligned with the accuracy of about the diameter of the removable guide portions 23-a to 23-b, the radio station apparatus for high place installation It is guided to the correct position with the rise of ten.

  Although the structures of the fixing and power receiving unit 13 and the fixing and power feeding unit 22 are schematically described in FIG. 1, the structures of the fixing and power receiving unit 13 and the power supply unit 22 are more specifically illustrated in FIG. In this figure, the fixed and power receiving unit 13 is configured by fixed units 17-a to 17-b and a power receiving unit 18. Similarly, the fixing and feeding portion 22 includes fixing claws 25-a to 25-b, hinge portions 26-a to 26-b, and push / cancel fixing portions 27-a to 27-b. The fixing portions 17-a to 17-b have lateral protrusions, and when the fixing claws 25-a to 25-b are applied thereto, the radio station apparatus 10 for high place installation and the fixed installation power supply unit 20 are connected. It will be The fixing claws 25-a to 25-b are movable via the hinges 26-a to 26-b. The push and cancel fixing portions 27-a to 27-b repeat a locked state in which the spring is contracted and an expanded and released state each time when a force is applied upward. In the locked state where the spring is contracted, the fixing claws 25-a to 25-b narrow inward through the hinge portions 26-a to 26-b, and the lateral projections of the fixing portions 17-a to 17-b are obtained. It will be in the state inserted. The push / cancel fixing units 27-a to 27-b can repeat the push state as the high-level installation radio station apparatus 10 moves up and down, and as a result, the lock state and the release state can be arbitrarily selected. Select and allow removal.

  For example, in the case of contact type power feeding, the power receiving unit 18 and the power feeding unit 24 allow the power receiving unit 18 and the power feeding unit 24 to have a slight degree of freedom of play, and when both approach, the contact state is ensured by a magnet or the like. On the other hand, it is possible to separate easily when it falls by its own weight at the time of recovery. Alternatively, the structure may be such that power can be supplied only by the power reception unit 18 and the power supply unit 24 coming close to a predetermined distance by power supply by non-contact power transmission.

  FIG. 3 is a diagram showing an overview of communication services provided by the wireless communication system 200 in the embodiment of the present invention. In the figure, a wireless communication system 200 includes a wireless entrance base station apparatus 6 and a wireless unit 7. The wireless unit 7 represents the wireless unit 11 included in the high-location radio station apparatus 10. Terminal stations 2-a to 2-g exist in the small cells 1-a to 1-g, respectively. In addition, the code | symbol 5 represents the human body. The radio unit 7 of the high-altitude installation radio station apparatus 10 has a relay station function for communicating with the radio entrance base station apparatus 6 in accordance with the function of the Massive MIMO base station 4 in FIG. 5. In general, since it is assumed that wireless standard functions different from the functions of Massive MIMO base station 4 and the relay station function for communicating with wireless entrance base station apparatus 6 are assumed, physically independent apparatuses, independent antennas In order to simplify the explanation, it is shown as one wireless unit 7 including both functions. Further, although not shown here, the mechanism shown in FIGS. 1 and 2 is attached to the upper part of the radio unit 7 of the radio station device for high places installation 10 and is installed at high places such as a ceiling. If necessary, it is possible to recover for maintenance using the unmanned flight function. The wireless entrance base station device 6 is connected to the terrestrial optical fiber network. The base station apparatus function of the radio unit 7 of the high-altitude installation radio station apparatus 10 and the traffic when the terminal stations 2-a to 2-g communicate are indicated by the radio unit 7 of the high-altitude installation radio station apparatus 10 and the radio entrance It transmits on the radio channel between the base station devices 6. As a result, while it is possible to irradiate the beam to the terminal stations 2-a to 2-g in a form looking down from a high place, maintenance can be easily realized as needed.

  As mentioned above, the wireless entrance base station device 6 has a ceiling installation for realizing picocell subdivision in a place such as a stadium or a trade fair where ultra-dense, ultra-large, and extra-heavy users generate extra-high capacity transmission. The entrance line is provided to the base station apparatus 100 for high place installation by radio. This is because the light equipment using the connector is not easy to attach and detach, and it can not easily cope with maintenance at the time of failure or upgrading of the device. In the present embodiment, the fixed installation power supply unit 20 installed on a ceiling or the like supplies only the power supply to reduce maintenance load, and the radio station apparatus 10 for high place installation having an installation and recovery mechanism utilizing a drone or the like. In combination with the above, to provide a service to the user under the radio station apparatus 10 for high place installation. For example, in the case of a stadium, the wireless entrance base station device 6 is installed near the lower end of the stand, and increases capacity by spatially multiplexing transmission toward a plurality of high-allocation base station devices 100 utilizing a line-of-sight environment. It is also possible to realize.

  The radio station apparatus for installation at high places of this embodiment must switch the lock state in the connected state and the release state at the time of recovery reliably in order to ensure the attachment / detachment with the fixed installation power supply unit. In order to perform this switching with a simple mechanism with few failures, the lock state and the release state are realized by a push and cancel type operation using the buoyancy obtained by the unmanned flight function.

  In addition, even if the radio station device for high place installation breaks down and collection of the device can not be performed by remote control, the same drone is blown to the radio station device for high place installation broken down, and The push / cancel type lock can be removed by applying an upward force from the lower part of the radio station apparatus for high place installation by the buoyancy of the drone, and it can be removed from the fixed installation power supply unit and recovered.

  According to the prior art, when a base station apparatus or an access point is installed and used at an ultrahigh place such as a stadium or a ceiling of a trade fair, it is difficult to perform maintenance easily and promptly when a failure occurs. The In the present embodiment, as described above, the base station for high place installation is combined with the radio station for high place installation, which is a flying object having a wireless function, and a fixed installation power supply unit installed on a ceiling or the like. Configure. Since it is possible to attach / detach to the fixed installation power supply unit using the flight function of the radio station apparatus for high places installation, it is possible to enhance the maintainability and provide the radio service from the high place to the lower side. Is possible.

  Although the embodiments of the present invention have been described above with reference to the drawings, it is apparent that the above embodiments are merely examples of the present invention, and the present invention is not limited to the above embodiments. is there. For example, the structures of the removable guide portions 14-a to 14-b and the removable guide portions 23-a to 23-b shown in FIG. 2 are merely examples, and the same function may be realized with any other structure. Absent. Moreover, when using the electric power feeding by non-contact-type electric power transmission, you may utilize the installation of what kind of specification, and when performing a contact-type electric power feeding, it is not necessary to necessarily utilize a magnet. Even in the case of wireless communication performed by the wireless unit implemented by the wireless station apparatus for installation in high places, any wireless standard can be used for both the wireless entrance line and the access line with the terminal station. Although FIG. 3 illustrates that the wireless unit has the Massive MIMO base station function, it is not necessary to include multiple element antenna elements, and one single element antenna accommodates one small cell or pico cell. It may be a configuration. Alternatively, a plurality of single directional antennas may be used, and each directional antenna may be configured to form individual small cells or pico cells. Therefore, additions, omissions, substitutions, and other modifications of the components may be made without departing from the technical spirit and scope of the present invention.

  According to the embodiment described above, the wireless communication system (for example, the wireless communication system 200) for providing the wireless access service to the terminal devices (for example, the terminal stations 2-a to 2-g) in the predetermined area is wireless An access base station apparatus (for example, high station radio station apparatus 10), a fixed installation unit (for example, fixed installation power supply section 20), and a radio entrance base station apparatus (for example, radio entrance base station apparatus 6) Prepare. The radio access base station apparatus provides the terminal apparatus with radio access for radio access service, and has a function of communicating with the radio entrance base station apparatus. The fixed installation unit is removable from the radio access base station apparatus. The wireless entrance base station device is a wireless station device connected to a network such as an optical fiber network on the ground, and has a communication function with the wireless access base station device.

  The radio access base station device includes a flying unit (for example, the unmanned flight function control unit 12 and the rotor units 15-1 to 15-4) and a first detachable unit (for example, the fixing and power receiving unit 13 and the fixing unit 17-a). To 17-b), a first wireless communication unit (for example, a part of the functions of the wireless unit 7 and the wireless unit 11), and a part of a function of the second wireless communication unit (for example, the wireless unit 7 and the wireless unit 11) And a power receiving unit (for example, the power receiving unit 18). The flying unit can move in three dimensions in space. The first attaching / detaching portion can be connected / disconnected to / from the fixed mounting portion. The first wireless communication unit performs wireless communication with a terminal device in the area for wireless access. The second wireless communication unit transmits and receives signals transmitted and received by the terminal apparatus via the first wireless communication unit to and from the wireless entrance base station apparatus using the wireless entrance line. The power reception unit receives power from the fixed installation unit in a state where the first detachable unit is connected to the fixed installation unit, and supplies the received power to each unit operated by electric power.

  The fixed installation portion is supplied with power from the second detachable portion (for example, the fixing claws 25-a to 25-b, the hinge portions 26-a to 26-b, and the push and cancel fixing portions 27-a to 27-b) And a power supply unit 24. The second attachment / detachment unit can be connected / disconnected to / from the radio access base station apparatus. The power supply unit supplies power to the radio access base station device in a state where the second detachable unit is connected to the radio access base station device.

  The wireless entrance base station apparatus includes a third wireless communication unit and a communication unit. The third wireless communication unit wirelessly communicates with the wireless access base station apparatus using the wireless entrance line. The communication unit transmits the signal received by the third wireless communication unit to a network (for example, an optical fiber network on the ground) connected with the communication destination of the terminal device, and receives the signal addressed to the terminal device received from the network. Transfer to the third wireless communication unit.

  One or both of the first attachment / detachment part and the second attachment / detachment part may be provided with a mechanism for switching the connection state and the release state by the upward buoyancy obtained by the flight part.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design and the like within the scope of the present invention.

  It is applicable to a wireless communication device.

DESCRIPTION OF SYMBOLS 10 Radio station apparatus 20 for high-place installation Fixed-station power supply part 2-a ~ 2-g Terminal station 5 Human body 6 Wireless entrance base station apparatus 7 Radio part 11 Radio part 12 Unmanned flight function control Unit 13: fixed and power receiving units 14-1 to 14-4, 14-a to 14-b: detachable guide unit,
15-1 to 15-4, 15-a to 15-b: Rotor portion 16: Camera portion 17-a to 17-b: Fixing portion 21: Ceiling fixed plate 22: Fixing and feeding portion 23-1 to 23-4 23-a to 23-b Detachable guide portion 24 Feeding portion 25-a to 25-b Fixing claw 26-a to 26-b Hinge portion 27-a to 27-b Push and cancel fixed portion 100 ... Base station apparatus 200 for installation in high places ... Wireless communication system

Claims (3)

A base station apparatus for providing a wireless access service to a terminal apparatus in a predetermined area, comprising:
The base station apparatus
A radio access base station apparatus providing radio access for radio access service to the terminal apparatus;
The wireless access base station apparatus and a fixed installation unit that can be attached and detached;
The radio access base station apparatus
A flight unit that can move three-dimensionally in space,
A first attaching / detaching portion capable of coupling / decoupling with the fixed installation portion;
A first wireless communication unit that wirelessly communicates with the terminal device;
A second wireless transmitting / receiving a signal transmitted / received by the terminal device via the first wireless communication unit to / from a wireless entrance base station device which is another wireless station device connected to a network using a wireless entrance line Communication department,
A power receiving unit for receiving power supply from the fixed installation unit in a state where the first detachable unit is connected to the fixed installation unit;
The fixed installation unit is
A second attachable / detachable unit capable of connecting and disconnecting with the radio access base station apparatus;
A power feeding unit for supplying power to the radio access base station apparatus in a state where the second attaching / detaching unit is connected to the radio access base station apparatus;
Base station device. One or both of the first attachment / detachment part and the second attachment / detachment part have a mechanism for switching the connection state and the release state by the upward buoyancy obtained by the flight part.
The base station apparatus according to claim 1. A wireless communication system for providing a wireless access service to a terminal device in a predetermined area, comprising:
The wireless communication system is
A radio access base station apparatus providing radio access for radio access service to the terminal apparatus;
A fixed installation unit attachable to and detachable from the radio access base station apparatus;
And a wireless entrance base station connected to the network;
The radio access base station apparatus
A flight unit that can move three-dimensionally in space,
A first attaching / detaching portion capable of coupling / decoupling with the fixed installation portion;
A first wireless communication unit that wirelessly communicates with the terminal device;
A second wireless communication unit that transmits and receives a signal transmitted and received by the terminal apparatus via the first wireless communication unit to and from the wireless entrance base station apparatus using a wireless entrance line;
A power receiving unit for receiving power supply from the fixed installation unit in a state where the first detachable unit is connected to the fixed installation unit;
The fixed installation unit is
A second attachable / detachable unit capable of connecting and disconnecting with the radio access base station apparatus;
A power supply unit for supplying power to the radio access base station apparatus in a state where the second detachable unit is connected to the radio access base station apparatus;
The wireless entrance base station apparatus
A third wireless communication unit configured to wirelessly communicate with the wireless access base station apparatus using the entrance line;
Wireless communication system.

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