WO2022085132A1 - Network system, base station, control device, transmission method, control method, and non-transitory computer-readable medium - Google Patents

Abstract

A network system (1) comprises: a broadcast station (10); and a base station (20). The broadcast station (10) includes a broadcast signal transmission unit (11) which transmits a broadcast signal to the base station (20) via a communication network (30). The base station (20) includes a broadcast signal reception unit (21) which receives the broadcast signal from the broadcast station (10) via the communication network (30), a conversion unit (22) which converts the received broadcast signal into a terrestrial advanced signal of a terrestrial advancement system, and an advanced signal transmission unit (23) which transmits the converted terrestrial advanced signal to a terminal device.

Description

Network systems, base stations, control devices, transmission methods, control methods and non-temporary computer-readable media

The present invention relates to a network system, a base station, a control device, a transmission method, a control method, and a non-temporary computer-readable medium.

In recent years, discussions have been underway regarding the sophistication of terrestrial digital broadcasting (advancement of terrestrial broadcasting). For example, the Ministry of Internal Affairs and Communications Information and Communication Council (Ministry of Internal Affairs and Communications Technical Examination Office) is studying 5G Broadcast (FeMBMS: Future evolved Multimedia Broadcast and Multicast Service), which is a broadcasting mode using a communication network (non-patent documents). 1). In addition, the Regulatory Reform Promotion Council has also presented the issue of substituting broadband (communication networks) for broadcasting networks.

However, in related discussions and related technologies, the method of distributing broadcast signals using relay stations of broadcast networks is the main consideration. When a broadcast signal is distributed using a relay station of a broadcast network, there is a problem that the capital investment of the relay station increases.

In view of these issues, the present disclosure discloses a network system, a base station, a control device, a transmission method, a control method, and a non-temporary method capable of distributing a broadcast signal via a communication network while suppressing an increase in capital investment. The purpose is to provide a computer-readable medium.

The network system according to the present disclosure includes a broadcasting station and a base station communicably connected to the broadcasting station, and the broadcasting station transmits a broadcasting signal to the base station via a communication network. The base station comprises a broadcasting signal receiving means for receiving the broadcasting signal from the broadcasting station via the communication network, and the received broadcasting signal is converted into a terrestrial advancement signal of the terrestrial advancement method. It includes a conversion means for conversion and a ground advancement signal transmission means for transmitting the converted ground advancement signal to a terminal device.

The base station according to the present disclosure includes a broadcast signal receiving means for receiving a broadcast signal from a broadcast station via a communication network, and a conversion means for converting the received broadcast signal into a terrestrial advancement signal of the terrestrial advancement method. The above-mentioned ground advancement signal transmission means for transmitting the converted ground advancement signal to the terminal device is provided.

The control device according to the present disclosure includes an acquisition means for acquiring a relay area of a relay station that relays a broadcast signal transmitted from a broadcast station, a selection means for selecting a base station corresponding to the acquired relay area, and the broadcast. It includes a control unit that controls the station to transmit the broadcast signal via the selected base station.

The transmission method according to the present disclosure is a transmission method in a network system including a broadcasting station and a base station communicably connected to the broadcasting station, and the broadcasting station is a broadcasting signal via a communication network. Is transmitted to the base station, and the base station receives the broadcast signal from the broadcast station via the communication network and converts the received broadcast signal into a terrestrial advancement signal of the terrestrial advancement method. The converted ground advancement signal is transmitted to the terminal device.

The control method according to the present disclosure acquires a relay area of a relay station that relays a broadcast signal transmitted from a broadcast station, selects a base station corresponding to the acquired relay area, and selects the base station from the broadcast station. It controls to transmit the broadcast signal via the station.

The non-temporary computer-readable medium according to the present disclosure acquires a relay area of a relay station that relays a broadcast signal transmitted from a broadcasting station, selects a base station corresponding to the acquired relay area, and selects the broadcasting station. A non-temporary computer-readable medium containing a program for causing a computer to execute a process that controls transmission of the broadcast signal via the selected base station.

According to the present disclosure, a network system, a base station, a control device, a transmission method, a control method, and a non-temporary computer-readable medium capable of distributing a broadcast signal via a communication network while suppressing an increase in capital investment. Can be provided.

It is a block diagram which shows the configuration example of the related network system. It is a block diagram which shows the outline of the network system which concerns on embodiment. It is a block diagram which shows the structural example of the network system which concerns on Embodiment 1. FIG. It is a sequence diagram which shows the example of the delivery method which concerns on Embodiment 1. FIG. It is a figure for demonstrating the example of the delivery method which concerns on Embodiment 1. FIG. It is a figure which shows the arrangement example of the signal used in the distribution method which concerns on Embodiment 1. FIG. It is a block diagram which shows the structural example of the control apparatus which concerns on Embodiment 2. It is a follow chart which shows the example of the transition method which concerns on Embodiment 2. It is a figure for demonstrating an example of the transition method which concerns on Embodiment 2. FIG. It is a figure for demonstrating an example of the transition method which concerns on Embodiment 2. FIG. It is a figure for demonstrating an example of the transition method which concerns on Embodiment 2. FIG. It is a follow chart which shows the example of the transition method which concerns on Embodiment 3. It is a figure for demonstrating an example of the transition method which concerns on Embodiment 3. FIG. It is a figure for demonstrating an example of the transition method which concerns on Embodiment 3. FIG. It is a figure for demonstrating an example of the transition method which concerns on Embodiment 3. FIG. It is a figure for demonstrating an example of the transition method which concerns on Embodiment 3. FIG. It is a figure for demonstrating an example of the transition method which concerns on Embodiment 3. FIG. It is a block diagram which shows the outline of the hardware of the computer which concerns on embodiment.

Hereinafter, embodiments will be described with reference to the drawings. In each drawing, the same elements are designated by the same reference numerals, and duplicate explanations are omitted as necessary.

(Examination leading to the embodiment)
Based on the recent discussions described above, the inventors have examined a method for migrating a broadcasting network to a communication network. In this study, as explained below, we found the problems in the operation of the broadcasting network and the problems in the transmission method of the communication network.

The current terrestrial digital 2K broadcasting uses UHF (Ultra High Frequency) broadcasting frequencies and is operated by a broadcasting network (relay station network) consisting of many relay stations (for example, about 200 stations in the Kanto region). In Japan, the Ministry of Internal Affairs and Communications (country) assigns UHF broadcasting frequencies (broadcasting channels) to each broadcasting station, and the assigned frequencies are used. Since the UHF broadcasting frequency used in the current terrestrial digital 2K broadcasting is already occupied by 2K broadcasting, it is difficult to find a free frequency for the next generation 4K / 8K broadcasting as it is. be. On the other hand, simultaneous online distribution of broadcast programs (for example, NHK + (NHK +) service provided by NHK) is provided using a communication network, and this simultaneous distribution is carried out by a best-effort service using an Internet network. ing.

FIG. 1 shows the configuration of the related network system. As shown in FIG. 1, the related network system 900 includes a relay station network 910 and a simultaneous distribution network 920.

The relay station network 910 includes a master station 911, a large-scale / medium-scale station 912, and a small-scale / mini-sate station 913 as relay stations. Each relay station of the relay station network 910 transmits the broadcast signal transmitted from the broadcast station 901 to the television receiver 931. The simultaneous distribution network 920 includes a streaming server 921, an Internet 922, and a 4G mobile base station 923. The streaming server 921 stores the broadcast signal transmitted from the broadcasting station 901 as streaming data, and distributes it to a terminal device 932 such as a smartphone via the Internet 922 and the 4G mobile base station 923.

One of the operational issues of the broadcasting network (relay station network) is the increase in the burden of capital investment. As shown in FIG. 1, the relay station network is composed of a large number of relay stations nationwide, and each broadcasting station installs and manages these relay stations. Therefore, in order to maintain and expand the relay station network, the burden of capital investment of the relay station in the broadcasting station increases. In particular, the profitability of commercial broadcasters has deteriorated in recent years, making it difficult to maintain and expand small / mini-sate stations managed by commercial broadcasters.

In addition, as a problem in the transmission method of the communication network (simultaneous distribution network), deterioration of the viewing environment due to access concentration of the terminal device can be mentioned. As shown in FIG. 1, simultaneous distribution is carried out using the Internet network, which is a best-effort service. Therefore, if the number of accesses from the terminal device increases, the streaming server may become saturated or the network may be congested, and the terminal device may not be able to watch the program. Furthermore, since this simultaneous distribution mainly transmits video and audio, services such as multi-organization and data broadcasting, which are digital broadcasting services, have not been realized. That is, with the current simultaneous distribution method on the Internet, it is not possible to replace the broadcasting network with a communication network.

Therefore, in the following embodiment, the broadcasting network can be transferred to the communication network by distributing the broadcasting signal via the communication network, and the above-mentioned operational problems of the broadcasting network and the transmission method of the communication network can be achieved. It makes it possible to solve the above problems.

(Outline of embodiment)
FIG. 2 shows an outline of the network system according to the embodiment. As shown in FIG. 2, the network system 1 according to the embodiment includes a broadcasting station 10 and a base station 20, and the broadcasting station 10 and the base station 20 are communicably connected via a communication network 30.

The broadcasting station is equipped with a broadcasting signal transmitting unit 11. The broadcast signal transmission unit 11 transmits a broadcast signal to the base station 20 via the communication network 30.

The base station 20 includes a broadcast signal receiving unit 21, a conversion unit 22, and a ground advanced signal transmitting unit 23. The broadcast signal receiving unit 21 receives a broadcast signal from the broadcasting station 10 via the communication network 30. The conversion unit 22 converts the broadcast signal received by the broadcast signal receiving unit 21 into a terrestrial advancement signal of a terrestrial advancement system (new terrestrial broadcasting system: Next Generation Terrestrial Broadcasting System). The ground altitude signal transmission unit 23 transmits the ground altitude signal converted by the conversion unit 22 to the terminal device.

As described above, in the embodiment, the broadcasting signal is transmitted from the broadcasting station to the base station via the communication network, and the base station converts the broadcasting signal received via the communication network into a terrestrial advancement signal and the terminal device. Send to. As a result, since the broadcast signal can be delivered to the terminal device via the communication network, the broadcast network can be transferred to the communication network, and the increase in capital investment can be suppressed. For example, by utilizing communication network technology such as a bandwidth guarantee service based on 5G network slicing technology, it is possible to reliably deliver television broadcasts.

Further, as described in the following embodiment, the network system according to the embodiment may realize a complete transition or a partial transition from a broadcasting network to a communication network. By making a complete or partial transition from a broadcasting network to a communication network, it is possible to generate broadcasting frequencies to be converted into a country. Further, in the case of partial migration, the broadcasting network may be gradually migrated at regular intervals. As a result, the transition from the broadcasting network to the communication network can be smoothly performed, and even if the transition is stopped in the middle stage, some broadcasting frequencies can be generated. Further, in the embodiment, by securing the simul transition period, it is possible to realize the transition with less impact on the viewer. Furthermore, not only the transition to 2K broadcasting but also the transition to new services such as 4K broadcasting will be possible.

(Embodiment 1)
Hereinafter, the first embodiment will be described with reference to the drawings. In this embodiment, an example of distributing a broadcast signal using a 5G mobile base station will be described.

FIG. 3 shows a configuration example of the network system according to the present embodiment. As shown in FIG. 3, the network system 2 according to the present embodiment includes a broadcasting station 100, a mobile base station 200, and a terminal device 300.

The broadcasting station 100 and the mobile base station 200 are communicably connected via the 5G backbone network 400. The mobile base station 200 and the terminal device 300 can communicate with each other by 5G mobile wireless communication. The 5G backbone network 400 is a network that serves as the backbone of the mobile base station 200, and includes a 5G core network. The 5G backbone network 400 and the mobile base station 200 constitute a 5G mobile network. For example, the 5G backbone network 400 is a communication network that connects a broadcasting station 100 and a mobile base station 200. The 5G backbone network 400 and the mobile base station 200 may be referred to as a communication network that distributes broadcast signals. If the broadcast signal can be distributed in the same manner as the 5G mobile network, 4G or other communication network may be used. That is, the mobile base station 200 is not limited to the 5G mobile base station, but may be a 4G or other base station.

The broadcasting station 100 distributes a broadcasting signal to the terminal device 300 via the 5G backbone network 400 and the mobile base station 200. The broadcasting station 100 may distribute a broadcasting signal via a broadcasting network. The broadcasting station 100 includes a broadcasting signal generation unit 110 and a broadcasting signal transmission unit 120.

The broadcast signal generation unit 110 is an encoder that generates a broadcast signal of a program (content data) to be distributed. For example, the broadcast signal is a signal in the MPEG2-TS format for terrestrial digital 2K broadcasting, the MPEG-DASH format, or the like. The broadcast signal generation unit 110 encodes the video and audio data of the program into the MPEG2-TS format or the like, and generates the MPEG2-TS signal or the like. The MPEG2-TS signal and the like are not limited to video and audio, but include data distributed by digital broadcasting services, multi-organized data, and the like. In the above, MPEG2-TS and MPEG-DASH are mentioned as examples of signals, but in addition to HEVC (High Efficiency Video Coding) for 4K broadcasting, VVC (Versatile Video Coding: next-generation video coding method) May generate a broadcast signal.

The broadcast signal transmission unit 120 is a 5G backbone communication unit that communicates with the mobile base station 200 via the 5G backbone network 400. The broadcast signal transmission unit 120 transmits the broadcast signal to the mobile base station 200 via the slice 401 whose bandwidth is guaranteed by the 5G backbone network 400. Slice is an end-to-end bandwidth-guaranteed bandwidth-guaranteed path based on 5G network slicing technology. If the broadcast signal can be transmitted in the same manner as the slice, another band guarantee path may be used. The broadcast signal transmission unit 120 may transmit the broadcast signal generated by the broadcast signal generation unit 110 at the time of distribution of the program, or may transmit a broadcast signal prepared in advance. For example, an encoded broadcast signal stored in a storage device may be acquired and the acquired broadcast signal may be transmitted.

The mobile base station 200 is a 5G mobile base station, and has a transmission (broadcasting) function of a broadcasting mode for terrestrial advancement in addition to the original function for 5G mobile communication. The mobile base station 200 includes a broadcast signal receiving unit 210, a terrestrial advanced modulation unit 220, and a terrestrial advanced transmitting unit 230.

The broadcast signal receiving unit 210 is a 5G backbone communication unit that communicates with the broadcasting station 100 via the 5G backbone network 400. The broadcast signal receiving unit 210 receives a broadcast signal from the broadcasting station 100 via the slice 401 of the 5G backbone network 400.

The terrestrial advancement modulation unit (conversion unit) 220 modulates (converts) the broadcast signal received from the broadcasting station 100 into a terrestrial advancement system terrestrial advancement signal. The terrestrial sophistication is to transmit a 2K broadcast signal or a 4K broadcast signal via a communication network by a terrestrial sophistication method such as FeMBMS. The terrestrial advancement method is a communication broadcasting mode method standardized for terrestrial advancement. For example, the ground advancement method is a FeMBMS method, and the ground advancement signal is a FeMBMS signal in a format according to the FeMBMS method (standard). The terrestrial sophistication method is not limited to the FeMBMS method, and may be a terrestrial broadcasting sophistication method under study or another method that will be standardized in the future.

The terrestrial advanced transmission unit 230 is a communication unit that performs wireless communication with the terminal device 300. The terrestrial advanced transmission unit 230 may be a transmission unit that performs wireless transmission by 5G mobile wireless communication. The terrestrial advancement transmission unit 230 wirelessly transmits the generated terrestrial altitude advancement signal to the terminal device 300 using a predetermined terrestrial altitude advancement band within the band for 5G.

The terminal device 300 is a mobile terminal such as a smartphone or a mobile phone that performs 5G mobile communication, and is equipped with a decoding function (for example, a FeMBMS chip) for terrestrial sophistication. The terminal device 300 is not limited to a mobile terminal, but may be a television receiver or other information processing device capable of receiving terrestrial advancement signals, a television receiver connected to an adapter capable of receiving terrestrial advancement signals, or the like. It may be an information processing device of. The terminal device 300 includes a ground advanced receiving unit 310, a demodulation unit 320, and a display unit 330.

The terrestrial advanced receiving unit 310 is a communication unit that performs wireless communication with the mobile base station 200. The terrestrial advanced receiving unit 310 may be a receiving unit that performs wireless reception by 5G mobile wireless communication. The terrestrial altitude receiving unit 310 wirelessly receives a terrestrial altitude signal from the mobile base station 200 by a predetermined terrestrial altitude band within the 5G band. In the case of FeMBMS, the FeMBMS signal can be received without a SIM card (no mobile communication contract required).

The demodulation unit 320 is a decoder that demodulates the ground advancement signal received from the mobile base station 200 and generates content data in a displayable (reproducible) format. For example, the demodulation unit 320 generates an MPEG2-TS signal or the like from a FeMBMS signal (may be another signal standardized in the future), and further produces video and audio data (data for data broadcasting) from the MPEG2-TS signal or the like. May be included). The display unit 330 is a display that displays content data (program) including demodulated video and audio.

FIG. 4 shows an example of a distribution method by the network system according to the present embodiment. As shown in FIG. 4, first, the broadcasting station 100 sets a slice between the broadcasting station 100 and the mobile base station 200 (S101). The broadcast signal transmission unit 120 (may be the broadcast signal reception unit 210 of the mobile base station 200) performs network slicing according to the 5G standard, and sets a slice for broadcast signal transmission in the 5G backbone network 400. As a result, end-to-end bandwidth guarantee can be realized from the broadcasting station 100 to the terminal device 300. When distributing via a plurality of mobile base stations 200, a slice may be set between the plurality of mobile base stations 200 and the plurality of mobile base stations 200. The broadcasting station 100 requests the operation management system of the 5G core network to set the slice based on the slice requirements (capacity, delay time, etc.), and the operation management system executes the processing necessary for the slice setting. You may.

Further, the slice used by the broadcasting station 100 may be set in advance, or may be set according to the program (content) to be distributed. For example, as shown in FIG. 5, a slice 401 for a normal channel may be set at the time of distribution of a normal program, and a slice 401 for a disaster channel may be set at the time of distribution of a disaster program. Further, when distributing a 4K broadcast, a slice 401 for a 4K channel may be set.

Next, the broadcasting station 100 generates a broadcasting signal to be distributed (S102), and transmits the generated broadcasting signal to the mobile base station 200 (S103). The broadcast signal generation unit 110 encodes the video and audio data of the program to generate, for example, an MPEG2-TS format broadcast signal. The broadcast signal transmission unit 120 selects a slice of the set 5G backbone network 400, and transmits the generated broadcast signal to the mobile base station 200 via the selected slice. For example, when a slice is set for each program, the slice corresponding to the program to be distributed is selected. For example, when transmitting to a plurality of mobile base stations 200, transmission may be performed by multicast.

Next, when the mobile base station 200 receives the broadcast signal, it generates a FeMBMS signal (S104) as an example of the terrestrial advancement signal, and transmits the generated FeMBMS signal to the terminal device 300 (S105). The broadcast signal receiving unit 210 receives the broadcast signal via the slice of the 5G backbone network 400, and the terrestrial advanced modulation unit 220 modulates the received MPEG2-TS format broadcast signal into a FeMBMS signal.

FIG. 6 shows an example of signal arrangement defined by FeMBMS. As shown in FIG. 6, in FeMBMS, the unit band of communication is 5 MHz, and the signal arrangement in this 5 MHz band is composed of 25 RBs (Resource Blocks). The terrestrial advanced modulation unit 220 converts an MPEG2-TS format signal into a FeMBMS format signal. That is, the MPEG2-TS signal is converted into an RB arranged as shown in FIG. The terrestrial altitude transmission unit 230 transmits the generated FeMBMS signal to the terminal device 300 using a predetermined terrestrial altitude advancement band (multicast channel included in the band allocated to 5G) within the 5G band. .. For example, the ground altitude signal is transmitted using the transmission frequency of Sub6 (3.6-6.0 GHz) for 5G. When slices are set for each program (channel), a transmission band of 5 MHz (band corresponding to the slice) is secured for each slice, and a broadcast signal is transmitted for each transmission band. For example, the broadcast signal received in the slice for the normal channel is transmitted in the transmission band of 5 MHz for the communication channel, and the broadcast signal received in the slice for the disaster channel is transmitted in the transmission band of 5 MHz for the disaster channel. As a result, the communication channel and the disaster channel can be delivered with the same image quality. Further, the broadcast signal received in the slice for the 4K channel may be transmitted in the transmission band of 5 MHz for the 4K channel. As a result, the image quality of 4K broadcasting can be guaranteed.

Next, when the terminal device 300 receives the FeMBMS signal, it demodulates the FeMBMS signal (S106) and displays the program (S107). The ground advancement receiving unit 310 receives the FeMBMS signal via a predetermined ground advancement band within the 5G band, and the demodulation unit 320 demodulates the received FeMBMS signal. For example, the signal of each RB is demodulated according to the signal arrangement as shown in FIG. 6, converted into an MPEG2-TS signal, and reproducible content data is generated from the converted MPEG2-TS signal. The display unit 330 displays the demodulated content data of the program on the display.

Although FIG. 4 shows a method of transmitting data from the broadcasting station to the terminal device in the downlink direction, it is possible to transmit data from the terminal device to the broadcasting station in the upstream direction, and data may be transmitted in both directions. For example, an application program for viewing a program is started on a terminal device, and the viewing history, user information, and the like are transmitted from the application program to the broadcasting station. As a result, the broadcasting station can collect viewing history and the like from the terminal device and utilize the collected information.

As described above, in the present embodiment, for example, terrestrial digital 2K broadcasting is transmitted to a mobile base station by using a bandwidth guarantee service using network slicing technology, and broadcasting using communication is performed from the mobile base station. It is transmitted (broadcast) by a terrestrial advanced method such as the FeMBMS transmission method, which is a mode, and is further received by a terminal device such as a smartphone or a television receiver having a terrestrial advanced decoding function. As a result, the broadcast signal can be distributed via the communication network, and the transition from the broadcast network to the communication network becomes possible. Since the broadcast signal can be distributed using a mobile base station instead of the relay station, it is possible to reduce the capital investment required for the relay station. Further, by using the 5G network slicing technology, the band for broadcasting signal transmission can be guaranteed, so that the broadcasting signal can be reliably distributed and the television broadcast can be watched without deterioration of quality on the terminal device.

Furthermore, by distributing the broadcast signal as in the present embodiment, it is possible to continue and expand the broadcast service. That is, since the current terrestrial digital 2K broadcasting service can be transmitted as it is by the communication band guarantee service, multi-organization and data broadcasting can be continuously distributed. Regarding 1Seg broadcasting, the FeMBMS method has a different segment configuration from the ISDB-T method, so it cannot be continued as it is, but since the FeMBMS method itself is premised on reception by terminal devices such as smartphones, mobile reception will continue to be realized. can. Furthermore, taking advantage of bidirectional transmission in a communication network, it is possible to realize targeting CM by broadcasting by viewing history data from a terminal device, and to generate a new channel in the event of a disaster by dynamic bandwidth control.

(Embodiment 2)
Hereinafter, the second embodiment will be described with reference to the drawings. In this embodiment, an example of migrating a broadcasting network to a communication network will be described using the network system of the first embodiment.

FIG. 7 shows a configuration example of the control device according to the present embodiment. The network system 3 according to the present embodiment includes a relay station network 3a (broadcasting network) and a mobile network 3b (communication network), and is a control device 600 for controlling a method of migrating the relay station network 3a to the mobile network 3b. It is equipped with. The control device 600 is connected to the broadcasting station 100, the mobile base station 200 of the mobile network 3b, and the relay station 500 of the relay station network 3a in a controllable manner. For example, it may be connected via the control plane or the control network of the mobile network 3b or the relay station network 3a. A part or all of the functions of the control device 600 may be included in the broadcasting station 100 or another device. For example, the broadcasting station 100 (broadcast signal transmitting unit 120) selects a mobile base station 200 for transmitting a broadcasting signal and sends a broadcasting signal to the selected mobile base station 200, similarly to the control device 600 according to the present embodiment. You may send it.

As shown in FIG. 7, the control device 600 includes a relay station management unit 610, a mobile base station management unit 620, a control unit 630, and a data collection unit 640.

The relay station management unit 610 manages a plurality of relay stations 500 constituting the relay station network 3a. The relay station management unit 610 is an acquisition unit that acquires information on the relay area of the relay station 500. The relay area is an area in which radio waves (broadcast signals) transmitted from the relay station 500 can be received. The output level of the relay station 500 may be acquired, not limited to the relay area. The mobile base station management unit 620 manages a plurality of mobile base stations 200 constituting the mobile network 3b. The mobile base station management unit 620 is an acquisition unit that acquires information on the wireless area of the mobile base station 200, and is also a selection unit that selects a migration destination mobile base station 200 corresponding to the migration source relay station 500. The wireless area is an area in which radio waves (broadcast signals) transmitted from the mobile base station 200 can be received.

The control unit 630 controls the distribution operation of the broadcast signal of the broadcasting station 100 and the transmission operation (ON / OFF) of the broadcasting signal of the relay station 500 and the mobile base station 200. The control unit 630 controls to distribute a broadcast signal from the broadcast station 100 via the selected mobile base station 200 of the migration destination. That is, the control unit 630 controls the transmission destination of the broadcast signal of the broadcast station 100 (selection of the mobile base station 200), and also controls the start and end of the transmission of the broadcast mode of the mobile base station 200. The control unit 630 may set a channel (slice) according to the program to be distributed, such as a disaster channel. In addition, the data collection unit 640 collects access data, viewing data, and the like of the terminal device. As described in the first embodiment, the data collection unit 640 may collect viewing data from the terminal device and control the programs and commercials distributed by the broadcasting station 100 based on the collected viewing data.

FIG. 8 shows a control method (transition method) by the control device according to the present embodiment. As shown in FIG. 8, first, the control device 600 acquires the relay area of the transfer source relay station 500 (S201). The relay station management unit 610 identifies the relay station 500 of the migration source, and acquires the information of the relay area of the specified relay station 500. The migration source relay station 500 may be specified according to the instruction of the administrator, or may be specified according to a preset migration plan. Further, the information of the relay area may be acquired from the specified relay station 500, or may be acquired from the database in which the information of each relay station 500 is registered.

Next, the control device 600 acquires the radio area of the mobile base station 200 (S202). The mobile base station management unit 620 acquires information on the wireless area of the mobile base station 200 in order to specify the migration destination. Information on the radio area of all the mobile base stations 200 may be acquired, or information on the radio area of the mobile base station 200 around the relay station 500 of the migration source (for example, in the same prefecture) may be acquired. Further, the information of the wireless area may be acquired from each mobile base station 200, or may be acquired from a database in which the information of each mobile base station 200 is registered.

Next, the control device 600 selects the mobile base station 200 as the migration destination (S203). 9 and 10 show a selection example of the mobile base station 200 as the migration destination. As shown in FIG. 9, the mobile base station management unit 620 is based on the information of the relay area of the specified migration source relay station 500 (relay area A1) and the information of the radio area of the mobile base station 200 (radio area A2). Then, the mobile base station 200 of the migration destination is selected. The mobile base station management unit 620 selects a plurality of mobile base stations 200 having a radio area corresponding to the relay area of the relay station 500 of the migration source. For example, as shown in FIG. 9, the relay area of the relay station 500 and the radio area of the mobile base station 200 are compared, and when a part or all of the relay area and the radio area overlap, the radio area included in the relay area is selected. Decide which mobile base station you have as the migration destination. In the example of FIG. 9, the relay area A1 of the relay station 500 of the migration source and the wireless area A2 of the peripheral mobile base stations 200-1 to 200-11 are compared, and the relay area A1 and the mobile base station 200-2 are compared. Since the radio areas A2 of 200-3, 200-5, 200-6, 200-7, 200-9, and 200-10 overlap, the mobile base stations 200-2, 200-3, 200-5, 200-6 , 200-7, 200-9, 200-10 are determined as migration destinations. Further, as shown in FIG. 10, a plurality of mobile base stations 200 installed in the relay area of the relay station 500 may be selected by acquiring the position of the mobile base station 200. In the example of FIG. 10, mobile base stations 200-2, 200-3, 200-5, 200-6, 200-7, 200-9, and 200-10 are installed in the relay area A1 of the relay station 500. (The location of the mobile base station is included in the relay area), so the mobile base stations 200-2, 200-3, 200-5, 200-6, 200-7, 200-9, 200-10 will be the migration destinations. decide. As with the relay area of the relay station 500, the mobile base station 200 corresponding to the output level of the relay station 500 may be selected.

Next, the control device 600 is controlled by the selected mobile base station 200 so as to make a simul transition (S204). The control unit 630 controls to distribute the broadcast signal via the relay station 500 of the migration source and the mobile base station 200 of the migration destination during the simulcast transition period. The control unit 630 instructs the broadcasting station 100 to transmit a broadcasting signal to the mobile base station 200 selected corresponding to the relay station 500 (instructing the selection of the mobile base station 200), and the broadcasting station 100 instructs the broadcasting station 100 to select. While the transmission of the broadcast signal to the relay station is continued, the transmission to the mobile base station 200 is started according to the instruction of the control unit 630. Further, the control unit 630 instructs the selected mobile base station 200 to transmit the broadcast signal transmitted from the broadcasting station 100 to the terminal device, and the mobile base station 200 responds to the instruction of the control unit 630. Start sending to the terminal device.

Next, the control device 600 is controlled so as to be completely migrated by the selected mobile base station 200 (S205). The control unit 630 controls to distribute the broadcast signal only through the selected mobile base station 200 after the lapse of the predetermined simulcast transition period. The control unit 630 instructs the broadcasting station 100 to stop the transmission of the broadcasting signal to the relay station 500 of the migration source, and the broadcasting station 100 continues to transmit the broadcasting signal to the mobile base station 200. , The transmission to the relay station 500 is stopped according to the instruction of the control unit 630. Further, the control unit 630 instructs the relay station 500, which is the migration source, to stop the transmission of the radio wave (broadcast signal). It should be noted that the complete migration may be performed without performing the simul migration. For example, after the control of S204, the control of S205 may be performed without waiting for the lapse of a predetermined period.

FIG. 11 shows an example of simul migration in the migration method of FIG. Simul transition is a method of transmitting both the signal of the old method (current method) and the signal of the new method, and stopping the signal transmission of the old method when the receiver (terminal device) of the new method becomes sufficiently widespread. be. As shown in FIG. 11, for example, the relay station network 3a includes a master station 501 and a medium-sized station 502 as relay stations, and the mobile network 3b includes a 5G backbone network 400 and a mobile base as in the first embodiment. Includes station 200.

Before the transition, the broadcasting station 100 distributes the broadcasting signal via the relay station network 3a. The broadcasting station 100 transmits a broadcasting signal to the master station 501, and the master station 501 converts the received broadcasting signal into an ISDB-T signal of the ISDB-T system, and uses the UHF broadcasting band to convert the ISDB-T signal. To send. In the case of broadcast wave relay, the medium-scale station 502 receives an ISDB-T signal from the master station 501, and relays and transmits the received ISDB-T signal using the UHF broadcasting band. The television receiver 700 receives the ISDB-T signal in the UHF broadcasting band and watches the distributed program.

At the time of the simulcast transition, the broadcasting station 100 distributes the broadcasting signal via the mobile network 3b as in the first embodiment while continuing the distribution of the broadcasting signal via the relay station network 3a. That is, the medium-scale station 502 relays and transmits the ISDB-T signal received from the master station 501 using the UHF broadcasting band as before the transition. For example, the communication area of the medium-scale station 502 of the migration source corresponds to the wireless area of the plurality of mobile base stations 200, and the plurality of mobile base stations 200 are selected as the migration destination. The broadcasting station 100 transmits a broadcasting signal to a plurality of selected mobile base stations 200 at the migration destination via the 5G backbone network 400. The plurality of mobile base stations 200 convert the received broadcast signal into a FeMBMS signal, and transmit the converted FeMBMS signal using the 5G band. As a result, in the relay area of the medium-scale station 502, the television receiver 700 can receive the ISDB-T signal from the medium-scale station 502 in the UHF broadcasting band and watch the distributed program as before the transition. Further, the terminal device 300 can receive the FeMBMS signal from the mobile base station 200 in the band for 5G and watch the distributed program.

As described above, in the present embodiment, the broadcasting network is transferred to the communication network by using the network system of the first embodiment. For example, a transition to a communication network will be made using a ground sophistication method such as the FeMBMS method. In particular, control is performed so that distribution is performed via a mobile base station corresponding to the relay area of the relay station of the migration source. As a result, the same service as the broadcasting service provided by the relay station of the migration source can be provided from the mobile base station after the migration. In addition, by distributing broadcast signals via both the broadcast network and the communication network at the time of the simul transition, and using the broadcast network and the communication network together until the viewer purchases a compatible terminal device, the burden on the viewer can be reduced. Enables a smooth transition.

It is also possible to shift from 2K broadcasting to 4K broadcasting. For example, if the coding method adopted in the FeMBMS method is the VVC method with a view to 4K streams and 4K distribution from broadcasting stations can be carried out with the spread of FeMBMS-compatible 4K TVs, stepwise 4K broadcasting will be possible. .. That is, 4K broadcasting becomes possible in the process of shifting from a broadcasting network to a communication network. For example, the FeMBMS method is assumed to be used in the millimeter wave, Sub6, and UHF bands, and HEVC can be used as the video coding method, but next-generation coding such as VVC can be selected in the future. Is. Therefore, it is technically possible to continue 2K broadcasting and to provide new services for 4K broadcasting. If the broadcasting station (performance center) supports 4K equipment or the TV receiver side is a 4K TV, the 4K broadcasting service can be started. For FeMBMS reception, it is necessary to purchase a FeMBMS compatible TV or FeMBMS adapter by the end of the 2K broadcast simulcast period from the broadcast relay station. If these TVs and adapters are compatible with 4K, it is possible to promote the spread of 4K on the receiving side.

(Embodiment 3)
Hereinafter, the third embodiment will be described with reference to the drawings. In the present embodiment, an example in which the broadcasting network is gradually transferred to the communication network in the migration method of the second embodiment will be described. The configuration of the network system is the same as that of the second embodiment, and for example, a control device controls the migration method according to the present embodiment.

FIG. 12 shows a migration method according to the present embodiment. As shown in FIG. 12, in the present embodiment, the transition in the first stage (S301), the transition in the second stage (S303), and the transition in the third stage (S305) are performed step by step. The transition operation of each stage is the same as that of the second embodiment. That is, at each transition stage, the control device 600 controls the transition from the relay station to the mobile base station by specifying the relay station of the transition source and selecting the mobile base station corresponding to the relay station.

For example, it may be gradually shifted according to the number of relay stages of the relay station. Specify a relay station with a predetermined number of relay stages, and shift to a mobile base station corresponding to the specified relay station. Specifically, the transition is made in descending order of the number of relay stages of the relay station. First, the relay station with the largest number of relay stages (with the first number of relay stages) is selected and migrated to the mobile base station, and then the relay station with the largest number of relay stages (with the second number of relay stages) is sequentially selected and migrated. You may. Further, it may be gradually shifted according to the relay scale of the relay station. For example, as the number of relay stages increases, the relay scale of the relay station decreases, a relay station of a predetermined relay scale is specified, and the mobile base station corresponding to the specified relay station is transferred. Specifically, the transition is made in ascending order of relay scale of the relay station. First, the relay station with the smallest relay scale (first relay scale) is selected and migrated to the mobile base station, and then the relay station with the smallest relay scale (second relay scale) is sequentially selected and migrated. You may. In this example, the mini-sate (gap filler) / small-scale relay station (first stage) is migrated, the medium-scale / large-scale relay station (second stage) is migrated, and finally the master station (third stage) is migrated. In stages. For example, the total transition period is more than a dozen years. It should be noted that the transition is not limited to the three stages, and the transition may be performed in any number of stages. For example, the mini-sate station, the small-scale station, the medium-scale station, the large-scale station, and the master station may be migrated in the order of five stages.

Further, in the present embodiment, it may be determined whether or not to stop the migration at each transition stage, and the transition may be completed at each transition stage. For example, if it is evaluated that the broadcasting mode in the communication network is inefficient at each transition stage, the transition to the communication network may be stopped in the middle stage. In that case, the UHF frequency vacant up to each stage may be used for transmission from the broadcast relay station by the FeMBMS method. However, in this case, the return of the broadcasting frequency channel is limited.

That is, as shown in FIG. 12, the first stage transition is performed (S301), it is determined whether or not to cancel the transition in the first stage (S302), and if it is determined to be canceled, the transition is terminated. If it is determined not to stop the migration in the first stage, the transition in the second stage is performed (S303), it is determined whether or not to stop the migration in the second stage (S304), and if it is determined to be stopped, the migration is terminated. do. If it is determined that the transition is not stopped in the second stage, the transition in the third stage is performed (S305) and the transition is terminated. The determination to cancel the migration may be made by the control device 600 based on the information of the migration source and the migration destination, or the administrator may instruct the determination result.

The transition of each stage will be explained below. FIG. 13 shows an example before migration in the network system according to the present embodiment. In the network system 4 according to the present embodiment, the relay station network 4a includes a master station 501, a large-scale / medium-scale station 502, and a small-scale / mini-sate station 503.

Broadcast station 100 transmits a broadcast signal to master station 501. The master station 501 receives a broadcast signal from the broadcast station 100, converts the received broadcast signal into an ISDB-T signal of the ISDB-T system, and transmits the ISDB-T signal using the UHF broadcast band. The large-scale / medium-scale station receives the ISDB-T signal from the master station 501, and relays and transmits the received ISDB-T signal using the UHF broadcasting band. The small-scale / mini-sate station 503 receives an ISDB-T signal from the large-scale / medium-scale station 502, and relays and transmits the received ISDB-T signal using the UHF broadcasting band. The television receiver 700 receives an ISDB-T signal in the UHF broadcasting band from any of the relay stations of the master station 501, the large-scale / medium-scale station 502, and the small-scale / mini-sate station 503, and distributes the program. View.

FIG. 14 shows an example of performing a simul transition in the first stage transition (S301) according to the present embodiment. In the first stage of migration, the small-scale / mini-sate station 503 will be migrated to the mobile base station 200. In order to perform the simul transition, the small-scale / mini-sate station 503 relays and transmits the ISDB-T signal received from the large-scale / medium-scale station 502 using the UHF broadcasting band as before the transition.

Further, for example, a mobile base station 200a corresponds to the relay area of the small-scale / mini-sate station 503 of the migration source, and this mobile base station 200a is selected as the migration destination. The broadcasting station 100 transmits a broadcasting signal to the selected migration destination mobile base station 200a via the 5G backbone network 400. The mobile base station 200a converts the received broadcast signal into a FeMBMS signal, and transmits the converted FeMBMS signal using the 5G band. As a result, in the relay area of the small-scale / mini-sate station 503, the television receiver 700 can receive the ISDB-T signal from the small-scale / mini-sate station 503 in the UHF broadcasting band, and can watch the distributed program. The device 300 can receive the FeMBMS signal from the mobile base station 200a in the band for 5G and watch the distributed program.

FIG. 15 shows an example of performing a simul transition in the second stage transition (S302) according to the present embodiment. In the second stage transition, the large-scale / medium-scale station 502 is further migrated from the state shown in FIG. 14 to the mobile base station 200. In order to perform the simul transition, the large-scale / medium-scale station 502 relays and transmits the ISDB-T signal received from the master station 501 using the UHF broadcasting band as before the transition.

Further, for example, a plurality of mobile base stations 200b correspond to the relay area of the large-scale / medium-scale station 502 of the migration source, and the plurality of mobile base stations 200b are selected as the migration destination. The broadcasting station 100 transmits a broadcasting signal to a plurality of selected mobile base stations 200b at the migration destination via the 5G backbone network 400. The plurality of mobile base stations 200b convert the received broadcast signal into a FeMBMS signal, and transmit the converted FeMBMS signal using the 5G band. As a result, in the relay area of the large-scale / medium-scale station 502, the television receiver 700 can receive the ISDB-T signal from the large-scale / medium-scale station 502 in the UHF broadcasting band and watch the distributed program. The terminal device 300 can receive the FeMBMS signal from the mobile base station 200b in the band for 5G and watch the distributed program.

FIG. 16 shows an example of performing simul transition in the transition of the third stage (S303) according to the present embodiment. In the transition of the third stage, the master station 501 is further migrated to the mobile base station 200 from the state shown in FIG. In order to perform the simulcast, the master station 501 converts the broadcast signal received from the broadcast station 100 into an ISDB-T signal and transmits the ISDB-T signal using the UHF broadcast band, as before the transition.

Further, for example, a plurality of mobile base stations 200c correspond to the relay area of the migration source master station 501, and the plurality of mobile base stations 200c are selected as the migration destination. The broadcasting station 100 transmits a broadcasting signal to a plurality of selected mobile base stations 200c at the migration destination via the 5G backbone network 400. The plurality of mobile base stations 200c convert the received broadcast signal into a FeMBMS signal, and transmit the converted FeMBMS signal using the 5G band. As a result, in the relay area of the master station 501, the television receiver 700 can receive the ISDB-T signal from the master station 501 in the UHF broadcasting band and watch the distributed program, and the terminal device 300 is a mobile base. The FeMBMS signal can be received from the station 200c in the band for 5G, and the distributed program can be viewed.

FIG. 17 shows an example in which the migration is stopped in the second stage (S304) in the migration method according to the present embodiment. In FIG. 17, since the transition is completed up to the second stage, the mobile base station 200a corresponding to the small-scale / mini-sate station 503 transmits the FeMBMS signal to the large-scale / medium-scale station 502 as in FIG. The corresponding mobile base station 200b is transmitting the FeMBMS signal. When the transition is stopped in this state, the master station 501 converts the broadcast signal received from the broadcast station 100 into an ISDB-T signal as before the transition, and uses the UHF broadcast band to convert the ISDB-T signal. Send. Further, the master station 501 converts the broadcast signal received from the broadcast station 100 into a FeMBMS signal, and shifts the UHF broadcast band (for example, the channel used by the large-scale / medium-scale station 502 and the small-scale / mini-sate station 503). It is used to transmit a FeMBMS signal. As a result, in the relay area of the master station 501, the television receiver 700 can receive the ISDB-T signal from the master station 501 in the UHF broadcasting band and watch the distributed program, and the terminal device 300 can watch the distributed program. The FeMBMS signal can be received from 501 in the UHF broadcasting band, and the distributed program can be viewed.

As described above, in this embodiment, the broadcast network is gradually shifted to the relay network. By migrating from the smallest relay stations to mobile base stations in order, the transition can proceed smoothly. For example, the application of the broadcasting mode (FeMBMS, etc.) by the communication network in the order of mini-sate / small-scale station (first stage), medium-scale / large-scale station (second stage), and master station (third stage) is applied to each stage. conduct. Furthermore, it is also possible to stop the application to the mobile base station in the middle of the process and transmit the FeMBMS method from the relay station by simulcasting. By applying the transition from mini-sate / small-scale stations, it is possible to respond to the measures of the 5G rural network and promote the transition. In addition, some commercial broadcasting local stations will be applied from mini-sate / small-scale stations because it is difficult to invest in small-scale / mini-sate stations after updating the parent stations and large-scale / medium-scale stations that are expected in the future. The effect of this is great.

In addition, by shifting as in this embodiment, it will be possible to return the broadcasting frequency originally assigned by the country. That is, in order to replace the current terrestrial digital 2K broadcasting broadcasting network and work with a communication network, as described above, each relay station is gradually shifted to a mobile base station, and the broadcasting mode can be applied by all communication networks. After a certain period of simul, the current broadcast relay station will be stopped. As a result, all UHF frequency channels (13ch to 52ch: 40ch) assigned for broadcasting can be returned to the country. In addition, even if the application to mobile base stations is stopped in the middle of the process, some UHF frequency channels assigned for broadcasting can be returned to the country.

Note that this disclosure is not limited to the above embodiment, and can be appropriately changed without departing from the spirit.

Each configuration in the above-described embodiment is configured by hardware and / or software, and may be composed of one hardware or software, or may be composed of a plurality of hardware or software. Each device and each function (processing) may be realized by a computer 40 having a processor 41 such as a CPU (Central Processing Unit) and a memory 42 which is a storage device, as shown in FIG. For example, a program for performing the method in the embodiment (for example, a control method of the control device) may be stored in the memory 42, and each function may be realized by executing the program stored in the memory 42 on the processor 41. ..

These programs are stored using various types of non-transitory computer readable medium and can be supplied to the computer. Non-temporary computer-readable media include various types of tangible storage mediums. Examples of non-temporary computer-readable media include magnetic recording media (eg, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg, magneto-optical disks), CD-ROMs (ReadOnlyMemory), CD-Rs, Includes CD-R / W, semiconductor memory (eg, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (random access memory)). The program may also be supplied to the computer by various types of transient computer readable medium. Examples of temporary computer readable media include electrical, optical, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

Although the present disclosure has been described above with reference to the embodiments, the present disclosure is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the structure and details of the present disclosure within the scope of the present disclosure.

A part or all of the above embodiment may be described as in the following appendix, but is not limited to the following.

(Appendix 1)
It is equipped with a broadcasting station and a base station that is communicably connected to the broadcasting station.
The broadcasting station includes a broadcasting signal transmitting means for transmitting a broadcasting signal to the base station via a communication network.
The base station is
A broadcast signal receiving means for receiving the broadcast signal from the broadcast station via the communication network.
A conversion means for converting the received broadcast signal into a terrestrial advancement signal, and a conversion means.
The ground altitude signal transmission means for transmitting the converted ground altitude signal to the terminal device,
A network system.
(Appendix 2)
The ground altitude signal is a FeMBMS signal of the FeMBMS (Further evolved Multicast and Multicast Services) system.
The network system according to Appendix 1.
(Appendix 3)
In the terrestrial altitude signal transmission means, the base station transmits the terrestrial altitude signal using a band for mobile communication.
The network system according to Appendix 1 or 2.
(Appendix 4)
The broadcast signal transmission means transmits the broadcast signal to the base station via a band-guaranteed band-guaranteed path in the communication network.
The network system according to any one of Supplementary note 1 to 3.
(Appendix 5)
The band guarantee route is a slice set by network slicing.
The network system according to Appendix 4.
(Appendix 6)
The slice is set according to the content of the broadcast signal.
The network system according to Appendix 5.
(Appendix 7)
The ground altitude signal transmission means transmits the ground altitude signal in a band corresponding to the slice.
The network system according to Appendix 5 or 6.
(Appendix 8)
As the base station, a plurality of base stations are provided.
The broadcast signal transmission means transmits the broadcast signal to a base station selected from the plurality of base stations.
The network system according to any one of Supplementary note 1 to 7.
(Appendix 9)
It is equipped with a plurality of relay stations that relay the broadcast signal in the broadcast network.
The broadcast signal transmitting means selects the base station corresponding to the relay station specified from the plurality of relay stations.
The network system according to Appendix 8.
(Appendix 10)
The broadcast signal transmitting means selects the base station corresponding to the relay area of the specified relay station.
The network system according to Appendix 9.
(Appendix 11)
The broadcast signal transmitting means selects the base station having a radio area included in the relay area of the specified relay station.
The network system according to Appendix 10.
(Appendix 12)
The broadcast signal transmitting means selects the base station installed in the relay area of the specified relay station.
The network system according to Appendix 10 or 11.
(Appendix 13)
The broadcast signal transmitting means selects the base station corresponding to the output level of the specified relay station.
The network system according to any one of Supplementary note 9 to 12.
(Appendix 14)
The broadcast signal transmission means selects the base station corresponding to a predetermined number of relay stages among the plurality of relay stations.
The network system according to any one of Supplementary note 9 to 13.
(Appendix 15)
In the plurality of relay stations, the relay scale becomes smaller as the number of relay stages increases.
The broadcast signal transmission means selects the base station corresponding to a relay station having a predetermined relay scale from the plurality of relay stations.
The network system according to Appendix 14.
(Appendix 16)
The broadcast signal transmitting means selects the base station corresponding to the relay station having the smallest relay scale among the plurality of relay stations.
The network system according to Appendix 15.
(Appendix 17)
After the selection, the broadcast signal transmitting means further identifies the relay station in ascending order of relay scale, and selects the base station corresponding to the specified relay station.
The network system according to Appendix 15.
(Appendix 18)
The broadcast signal transmission means transmits the broadcast signal to the relay station and the base station corresponding to the relay station.
The network system according to any one of Supplementary note 9 to 17.
(Appendix 19)
A control device for instructing the selection of the base station is provided.
The network system according to any one of Supplementary note 8 to 18.
(Appendix 20)
A broadcasting signal receiving means for receiving a broadcasting signal from a broadcasting station via a communication network,
A conversion means for converting the received broadcast signal into a terrestrial advancement signal, and a conversion means.
The ground altitude signal transmission means for transmitting the converted ground altitude signal to the terminal device,
A base station.
(Appendix 21)
An acquisition means for acquiring the relay area of the relay station that relays the broadcast signal transmitted from the broadcast station, and
A selection means for selecting a base station corresponding to the acquired relay area, and
A control means for controlling transmission of the broadcast signal from the broadcast station via the selected base station.
A control device.
(Appendix 22)
The control means controls to transmit the broadcast signal from the broadcast station via the relay station and the base station.
The control device according to Appendix 21.
(Appendix 23)
The control means controls to transmit the broadcast signal from the broadcast station only via the base station after a predetermined period of time has elapsed.
The control device according to Appendix 21.
(Appendix 24)
The control means controls to transmit the broadcast signal via the base station corresponding to the relay station of the first relay scale in the first transition stage, and in the second transition stage, the first Controlled to transmit the broadcast signal via a base station corresponding to the relay station having a second relay scale larger than the relay scale.
The control device according to any one of Supplementary note 21 to 23.
(Appendix 25)
The control means determines whether or not to control the second transition stage after the control of the first transition stage.
The control device according to Appendix 24.
(Appendix 26)
A transmission method in a network system including a broadcasting station and a base station communicably connected to the broadcasting station.
The broadcasting station
Broadcast signals are transmitted to the base station via a communication network.
The base station is
The broadcast signal is received from the broadcast station via the communication network, and the received broadcast signal is converted into a terrestrial advancement signal of the terrestrial advancement method.
The converted ground altitude signal is transmitted to the terminal device.
Transmission method.
(Appendix 27)
Acquire the relay area of the relay station that relays the broadcast signal transmitted from the broadcast station,
Select the base station corresponding to the acquired relay area and select
Controlled to transmit the broadcast signal from the broadcast station via the selected base station.
Control method.
(Appendix 28)
Acquire the relay area of the relay station that relays the broadcast signal transmitted from the broadcast station,
Select the base station corresponding to the acquired relay area and select
Controlled to transmit the broadcast signal from the broadcast station via the selected base station.
A non-temporary computer-readable medium that contains programs that allow a computer to perform processing.

1-4 Network system 3a Relay station network 3b Mobile network 4a Relay station network 4b Mobile network 10 Broadcasting station 11 Broadcasting signal transmitting unit 20 Base station 21 Broadcasting signal receiving unit 22 Conversion unit 23 Terrestrial advanced signal transmitting unit 30 Communication network 40 Computer 41 Processor 42 Memory 100 Broadcast station 110 Broadcast signal generator 120 Broadcast signal transmitter 200 Mobile base station 210 Broadcast signal receiver 220 Terrestrial advancement modulator 230 Terrestrial advancement transmitter 300 Terminal device 310 Terrestrial advancement receiver 320 Demodition unit 330 Display 400 5G Backbone network 401 Slice 500 Relay station 501 Master station 502 Large-scale / Medium-scale station 503 Small-scale / Mini-sate station 600 Control device 610 Relay station management unit 620 Mobile base station management unit 630 Control unit 640 Data collection unit 700 TV receiver

Claims (28)

1. It is equipped with a broadcasting station and a base station that is communicably connected to the broadcasting station.
   The broadcasting station includes a broadcasting signal transmitting means for transmitting a broadcasting signal to the base station via a communication network.
   The base station is
   A broadcast signal receiving means for receiving the broadcast signal from the broadcast station via the communication network.
   A conversion means for converting the received broadcast signal into a terrestrial advancement signal, and a conversion means.
   The ground altitude signal transmission means for transmitting the converted ground altitude signal to the terminal device,
   A network system.
2. The ground altitude signal is a FeMBMS signal of the FeMBMS (Further evolved Multicast and Multicast Services) system.
   The network system according to claim 1.
3. In the terrestrial altitude signal transmission means, the base station transmits the terrestrial altitude signal using a band for mobile communication.
   The network system according to claim 1 or 2.
4. The broadcast signal transmission means transmits the broadcast signal to the base station via a band-guaranteed band-guaranteed path in the communication network.
   The network system according to any one of claims 1 to 3.
5. The band guarantee route is a slice set by network slicing.
   The network system according to claim 4.
6. The slice is set according to the content of the broadcast signal.
   The network system according to claim 5.
7. The ground altitude signal transmission means transmits the ground altitude signal in a band corresponding to the slice.
   The network system according to claim 5 or 6.
8. As the base station, a plurality of base stations are provided.
   The broadcast signal transmission means transmits the broadcast signal to a base station selected from the plurality of base stations.
   The network system according to any one of claims 1 to 7.
9. It is equipped with a plurality of relay stations that relay the broadcast signal in the broadcast network.
   The broadcast signal transmitting means selects the base station corresponding to the relay station specified from the plurality of relay stations.
   The network system according to claim 8.
10. The broadcast signal transmitting means selects the base station corresponding to the relay area of the specified relay station.
    The network system according to claim 9.
11. The broadcast signal transmitting means selects the base station having a radio area included in the relay area of the specified relay station.
    The network system according to claim 10.
12. The broadcast signal transmitting means selects the base station installed in the relay area of the specified relay station.
    The network system according to claim 10 or 11.
13. The broadcast signal transmitting means selects the base station corresponding to the output level of the specified relay station.
    The network system according to any one of claims 9 to 12.
14. The broadcast signal transmission means selects the base station corresponding to a predetermined number of relay stages among the plurality of relay stations.
    The network system according to any one of claims 9 to 13.
15. In the plurality of relay stations, the relay scale becomes smaller as the number of relay stages increases.
    The broadcast signal transmission means selects the base station corresponding to a relay station having a predetermined relay scale from the plurality of relay stations.
    The network system according to claim 14.
16. The broadcast signal transmitting means selects the base station corresponding to the relay station having the smallest relay scale among the plurality of relay stations.
    The network system according to claim 15.
17. After the selection, the broadcast signal transmitting means further identifies the relay station in ascending order of relay scale, and selects the base station corresponding to the specified relay station.
    The network system according to claim 15.
18. The broadcast signal transmission means transmits the broadcast signal to the relay station and the base station corresponding to the relay station.
    The network system according to any one of claims 9 to 17.
19. A control device for instructing the selection of the base station is provided.
    The network system according to any one of claims 8 to 18.
20. A broadcasting signal receiving means for receiving a broadcasting signal from a broadcasting station via a communication network,
    A conversion means for converting the received broadcast signal into a terrestrial advancement signal, and a conversion means.
    The ground altitude signal transmission means for transmitting the converted ground altitude signal to the terminal device,
    A base station.
21. An acquisition means for acquiring the relay area of the relay station that relays the broadcast signal transmitted from the broadcast station, and
    A selection means for selecting a base station corresponding to the acquired relay area, and
    A control means for controlling transmission of the broadcast signal from the broadcast station via the selected base station.
    A control device.
22. The control means controls to transmit the broadcast signal from the broadcast station via the relay station and the base station.
    The control device according to claim 21.
23. The control means controls to transmit the broadcast signal from the broadcast station only via the base station after a predetermined period of time has elapsed.
    22. The control device according to claim 22.
24. The control means controls to transmit the broadcast signal via the base station corresponding to the relay station of the first relay scale in the first transition stage, and in the second transition stage, the first Controlled to transmit the broadcast signal via a base station corresponding to the relay station having a second relay scale larger than the relay scale.
    The control device according to any one of claims 21 to 23.
25. The control means determines whether or not to control the second transition stage after the control of the first transition stage.
    The control device according to claim 24.
26. A transmission method in a network system including a broadcasting station and a base station communicably connected to the broadcasting station.
    The broadcasting station
    Broadcast signals are transmitted to the base station via a communication network.
    The base station is
    The broadcast signal is received from the broadcast station via the communication network, and the received broadcast signal is converted into a terrestrial advancement signal of the terrestrial advancement method.
    The converted ground altitude signal is transmitted to the terminal device.
    Transmission method.
27. Acquire the relay area of the relay station that relays the broadcast signal transmitted from the broadcast station,
    Select the base station corresponding to the acquired relay area and select
    Controlled to transmit the broadcast signal from the broadcast station via the selected base station.
    Control method.
28. Acquire the relay area of the relay station that relays the broadcast signal transmitted from the broadcast station,
    Select the base station corresponding to the acquired relay area and select
    Controlled to transmit the broadcast signal from the broadcast station via the selected base station.
    A non-temporary computer-readable medium that contains programs that allow a computer to perform processing.

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