JP2009111925A - Broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To continuously receive broadcast such as terrestrial digital broadcast regardless of presence/absence of a radio wave interruption zone. <P>SOLUTION: Before its own vehicle is traveled in a radio wave interruption zone such as a tunnel, its own vehicle searches for another vehicle A communicable with its own vehicle. The other communicable vehicle A also searches for another communicable vehicle B, other than its own vehicle, and other communicable vehicles are sequentially found out in a similar style, thereby forming a vehicle-to-vehicle local network. When its own vehicle is moved into a radio wave interruption zone, the vehicle-to-vehicle local network is used to specify the other vehicle capable of receiving terrestrial digital broadcast, and the broadcast is received via the local network. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a broadcast receiving apparatus, for example, a broadcast receiving apparatus that receives and outputs a broadcast such as a terrestrial digital broadcast.

A broadcast receiving device that receives various broadcasts such as terrestrial digital broadcasts and FM broadcasts and displays the broadcasts on a speaker or an image display device is disposed in the vehicle.
In particular, with the start of digital terrestrial broadcasting in recent years, each of Patent Documents 1 to 3 proposes a technique for recording and reproducing and displaying a digital broadcast with a clear image using a vehicle.
JP 2001-94897 A JP 2006-54538 A JP-A-2005-184316

However, in the techniques described in Patent Documents 1 and 2, the broadcast cannot be received and output in the vehicle while passing through a radio wave non-interruptible section where the broadcast cannot be received, such as a tunnel.
On the other hand, in the technique described in Patent Document 3, when it is difficult to receive a program reserved for viewing or recording, reservation data is transmitted to a home program recording / playback server and recorded by the program recording / playback server. The program reserved later can be viewed.
However, in the technique described in Patent Document 3, the video is recorded on the home program recording / playback server, but cannot be output in real time by the broadcast receiving device in the vehicle.

  Accordingly, an object of the present invention is to provide a broadcast receiving apparatus capable of continuously receiving and outputting a broadcast such as a terrestrial digital broadcast regardless of the presence or absence of a radio wave interruption section.

(1) In the first aspect of the present invention, the first broadcast receiving means for receiving the broadcast, the non-interruptible section acquiring means for acquiring the radio non-communication section that is present on the travel route and cannot receive the broadcast, and the acquired Before traveling in a radio wave non-communication section, when network formation means that forms a local network with other vehicles that can communicate, and when the first broadcast reception means can not receive the broadcast, via the formed local network, A broadcast receiving apparatus comprising: a second broadcast receiving unit that receives a broadcast from another vehicle; and an output unit that outputs the broadcast received by the first broadcast receiving unit or the second broadcast receiving unit. provide.
(2) In the invention according to claim 2, the network forming means forms a local network in response to a request from another requesting vehicle, and passes the formed local network in response to a request from the requesting vehicle. The broadcast receiving apparatus according to claim 1, further comprising broadcast relay means for relaying and transmitting the broadcast received by the first broadcast receiving means to the requesting vehicle.
(3) In the invention according to claim 3, when the broadcast relay means cannot receive a broadcast by the first broadcast receiving means, the second broadcast receiving means receives a broadcast from another vehicle and relays it to the requesting vehicle. The broadcast receiving apparatus according to claim 2 is provided.

According to the first aspect of the present invention, when the local network is formed with another vehicle that can communicate before traveling in the radio wave non-interruption section, and the first broadcast receiving means cannot receive the broadcast, the formed local network Since the broadcast is received from the other vehicle via the broadcast, the broadcast can be continuously received regardless of the presence or absence of the radio wave interruption section.
According to the second aspect of the present invention, a local network is formed in response to a request from another vehicle, and the broadcast received by the first broadcast receiving means is relayed to the requesting vehicle, so that it can function as a repeater. .
According to invention of Claim 3, even if it is a case where the own vehicle cannot receive broadcast by the 1st broadcast receiving means, it can function as a relay machine.

Hereinafter, preferred embodiments of the broadcast receiving apparatus of the present invention will be described in detail with reference to FIGS.
(1) Outline of Embodiment In the broadcast receiving apparatus of this embodiment, when receiving a broadcast, for example, a terrestrial digital broadcast, even if it passes through a radio wave non-intersection such as a tunnel, The reception is not interrupted.
That is, the host vehicle searches for another vehicle A that can communicate with the host vehicle before traveling in a radio wave non-intersection such as a tunnel. The other vehicle A that can communicate also searches for another vehicle B other than the communicable vehicle, finds other vehicles that can communicate one after another in the same form, and forms an inter-vehicle local network. Using this inter-vehicle local network, when the host vehicle moves to a radio wave non-communication zone, another vehicle capable of receiving terrestrial digital broadcasting is specified, and the broadcast is received through the local network.

FIG. 1 shows an outline of a broadcast reception state according to this embodiment.
As shown in FIG. 1A, the host vehicle detects the current position of the vehicle and searches for a radio wave non-existing section existing on the travel route.
Then, before traveling in the radio wave non-communication zone, specifically, another vehicle A that can communicate with the host vehicle is searched Nm (for example, 300 m) before the start point of the radio wave non-communication zone. The other vehicle A that can communicate with the own vehicle searches for another vehicle B that can communicate with the own vehicle, finds vehicles that can communicate with each other in the same manner, and forms a local network between the vehicles.
In FIG. 1A, the thin line connecting the vehicles represents a state in which a vehicle-to-vehicle local network is formed.

  Note that a travel route to the destination may be acquired by route search performed within the host vehicle or received from the information center, and a radio wave non-existing section existing on the travel route to the destination may be searched in advance.

As shown in FIG. 1 (b), when the own vehicle enters the radio wave non-communication zone and the radio wave intensity becomes insufficient, the other vehicle that can receive the terrestrial digital broadcast is specified using the pre-formed local network between vehicles. The broadcast is received through the inter-vehicle local network.
That is, the own vehicle requests the other vehicle A to relay the broadcast, and the other vehicle A cannot receive the broadcast requested to be relayed from the broadcasting station with sufficient radio wave intensity. Request relay. Thus, the broadcast request issued from the own vehicle is expanded together with the relay request range until another vehicle that can be received from the broadcast station is found.

Then, when the relay request is transmitted from the broadcasting station to the receivable other vehicle C, the other vehicle C relays the received broadcast and transmits it to the other vehicle B requesting the other vehicle C. To do.
Similarly, the broadcast received from the other vehicle C is relayed from the other vehicle B to the other vehicle A and received by the own vehicle.
After passing through the radio wave non-interval section and receiving the broadcast by the own vehicle, the end of the relay request is transmitted to the other vehicle A that has received the broadcast by the own vehicle and has requested the relay. The end of the relay request is transmitted to the other vehicle C that has received the broadcast from the broadcast station. Each other vehicle that has received the relay request end transmits the relay request end to the other vehicle while ending the relay.

  In this way, when the other vehicle functions as a repeater through the inter-vehicle local network with other vehicles that can receive the broadcast, the broadcast radio wave such as terrestrial digital broadcasting is completely interrupted by the own vehicle Even so, broadcasts can be continuously received and output.

(2) Details of Embodiment FIG. 2 shows a configuration of a broadcast receiving apparatus.
The broadcast receiving apparatus includes a central processing unit 11.
The central processing unit 11 includes a GPS receiver 13, an input device 14, an audio output device 15, a hard disk 16, a radio wave intensity map database 17, an RF receiver 18, and a radio wave intensity monitoring circuit 19 via a bus line 12 such as a data bus. A monitor 20, a transceiver 22 and other devices are connected.

The central processing unit 11 is configured by a computer system including a CPU, a ROM, and a RAM. According to various programs and data stored in the hard disk 16 and the ROM, the inter-vehicle local network forming process in this embodiment, the terrestrial digital Various processes such as broadcast reception processing and broadcast relay processing are performed.
The central processing unit 11 has a built-in clock, and is used for monitoring the start time of broadcast reception for which a reservation or a reproduction instruction has been given.

The GPS receiver 13 is for outputting the current position data of the vehicle by longitude and latitude. The GPS receiver 13 includes a GPS receiver that receives signals from a plurality of GPS satellites and measures the absolute position of the user.
The GPS receiver 13 functions as a vehicle position acquisition unit that measures the current position of the vehicle. In addition to or instead of the GPS receiver 13, the vehicle position acquisition means may include a geomagnetic sensor, a gyro sensor, a vehicle speed sensor, and the like that detect the geomagnetism and determine the direction of the vehicle.

The input device 14 is a device for inputting information required for destination input, broadcast recording reservation, playback reservation, and the like.
As the input device 14, various devices such as a touch panel (functioning as a switch), a keyboard, a mouse, a light pen, a joystick, an infrared remote control, a touch panel attached to the display screen of the monitor 20, a remote control, and a voice recognition device can be used. It constitutes an input means for inputting various information.

  The audio output device 15 includes a plurality of speakers and an audio control device arranged in the vehicle. The voice output device 15 outputs the voice for the voice guidance guide for the reception of the broadcast controlled by the voice control unit and the purpose input and the received broadcast from the speaker.

The hard disk 16 stores the broadcast contents of the terrestrial digital broadcast station 181 received from the RF receiver 18 and the transceiver 22.
The hard disk 16 also stores map data in addition to data for searching for travel routes such as destination data and road data. Further, various programs and data such as a broadcast receiving program and a navigation program according to the present embodiment are stored.

The radio wave intensity map database 17 stores radio wave non-interval sections where terrestrial digital broadcasting cannot be received.
This radio wave non-interval section stores section data corresponding to road data used for route search. That is, the road data is composed of nodes indicating points on the road and links connecting the nodes, and each node and link is assigned a node number and a link number. The link number corresponding to the section is specified.
In addition, the radio wave non-interval section stored in the radio wave intensity map database 17 is defined for a section where the radio wave of digital terrestrial broadcasting cannot be received at all times, but there are also radio waves that may not be received depending on conditions such as weather. The unstable section may be included in the radio wave non-communication section and stored. In this case, you may make it preserve | save by distinguishing a radio wave interruption area and a radio wave unstable area always.
In addition, about the radio wave interruption section, the radio wave reception state by the own vehicle is constantly monitored and updated.

An RF (Radio Frequency) receiver 18 is a receiver that receives broadcasts from the terrestrial digital broadcasting station 181.
The radio wave intensity monitoring circuit 19 is a monitoring circuit that detects the intensity of radio waves (broadcast radio waves) received by the RF receiver 18. That is, it is detected whether or not the received radio wave has an intensity level at which broadcasting can be reproduced.

The monitor 20 displays an image obtained by the received digital terrestrial broadcast.
Further, the monitor 20 displays input information such as a destination and a broadcast reservation by the input device 14, displays information necessary for the input operation, or a map around the current vehicle location when the monitor 20 is also used as a navigation device. And travel route, current vehicle position, etc. are displayed.
The monitor 20 includes a liquid crystal display, a plasma display, a CRT display, and the like. In some cases, the display surface may include a touch panel constituting the input device 14.

  The transmitter / receiver 22 is a transmitter / receiver for performing inter-vehicle communication 221 with other vehicles via a wireless communication line, and is configured by a wireless LAN communication device. A vehicle-to-vehicle local network is formed with another vehicle via the transmitter / receiver 22, and terrestrial digital broadcasting broadcast while traveling in a radio wave non-communication section is received from the other vehicle through vehicle-to-vehicle communication. The transceiver 22 transmits a network connection request and a corresponding broadcast relay request to the other vehicle, and receives a network connection permission and the broadcast from the other vehicle.

The inter-vehicle communication by the transmitter / receiver 22 of the present embodiment uses, for example, a wireless LAN communication system based on a spread spectrum communication system. For example, a one-to-n relationship by broadcast or multicast having a radius of 200 m to 1 km as a communicable area. A local network is formed with other vehicles by adopting a communication form of (n is a plurality).
On the other hand, between other vehicles forming a network, a necessary broadcast relay request and the corresponding broadcast are transmitted by one-to-one type communication by unicast specifying an IP address.
In addition, when another vehicle transmits a broadcast requested to be relayed, unicast communication specifying an IP address included in the received relay request is performed.
However, the inter-vehicle communication method is not limited to the above example, and other communication methods may be used.

Broadcast reception by the broadcast receiving apparatus according to the present embodiment configured as described above will be described.
FIG. 3 is a flowchart showing the formation process of the inter-vehicle local network.
This inter-vehicle local network formation process is a process performed before reaching the radio wave non-intersection.
First, the central processing unit 11 acquires vehicle position information from the GPS receiver 13 (step 10). Then, the central processing unit 11 acquires the radio field intensity of the broadcast broadcast by the terrestrial digital broadcasting station 181 (hereinafter simply referred to as a broadcasting station) and received by the RF receiver 18 from the radio field intensity monitoring circuit 19 (step 11).

Then, the central processing unit 11 refers to the radio wave intensity map database 17 (step 12) and determines whether or not the radio wave intensity at the current position acquired from the radio wave intensity monitoring circuit 19 is the same (step 13).
When the radio field intensity relative to the current position (whether or not it corresponds to a radio wave interruption section) is different from the actual measurement by the radio field intensity monitoring circuit 19 and the radio field intensity map database 17 (step 13; N), the central processing unit 11 The map database 17 is updated according to the actual measurement (step 14).

  Next, the central processing unit 11 monitors whether or not the radio wave interruption section is near from the vehicle current position information and the radio wave intensity map database 17 (step 15). Whether or not the radio wave non-communication section is near is determined to be close to the case where the vehicle current position is nearer than Nm from the start point of the radio wave non-transmission section.

When the radio wave non-communication section is near (step 15; Y), the central processing unit 11 searches for another vehicle capable of forming a vehicle-to-vehicle local network (step 16, step 17; N).
If there is another vehicle capable of a vehicle-to-vehicle local network (step 17; Y), the central processing unit 11 forms a vehicle-to-vehicle local network between the vehicles (step 18), and ends the process.
The communication sequence for forming the inter-vehicle local network will be described later.

FIG. 4 is a flowchart showing reception processing of digital terrestrial broadcasting by the own vehicle.
The central processing unit 11 receives the terrestrial digital broadcast broadcast by the terrestrial digital broadcast station 181 by the RF receiver 18 of the own vehicle (step 20).
Next, the central processing unit 11 acquires the intensity of the radio wave received by the own vehicle from the radio wave intensity monitoring circuit 19 (step 21), and determines whether the radio wave intensity is sufficient (step 22).
If the radio wave intensity is sufficient (step 21; Y), the central processing unit 11 returns to step 20 and continues receiving the broadcast by the own vehicle.

When the radio wave intensity of the broadcast received by the RF receiver 18 of the own vehicle is not sufficient (step 22; N), the central processing unit 11 receives the broadcast by using another vehicle as a relay station by inter-vehicle communication (steps 23 to 23). Step 28).
That is, the central processing unit 11 searches for another vehicle capable of receiving terrestrial digital broadcast (step 23), and ends the process when there is no other vehicle (step 24; N).

  On the other hand, when there is another vehicle capable of receiving the terrestrial digital broadcast (step 24; Y), the central processing unit 11 uses the other vehicle as a terrestrial digital broadcast repeater and transmits the signal via the transceiver 22. The digital wave broadcast is received (step 25).

Next, the central processing unit 11 of the host vehicle determines whether or not terrestrial digital broadcasting can be received (step 26). This judgment is a judgment for changing from reception by inter-vehicle communication of terrestrial digital broadcasting (step 25) to reception by own vehicle (step 20) when passing through a radio wave non-communication section.
Therefore, the central processing unit 11 determines that the own vehicle can be received if the radio wave intensity of the terrestrial digital broadcast received by the RF receiver 18 of the own vehicle is sufficient as in steps 20 to 21 (step 26; Y).

If the own vehicle cannot be received (step 26; N), the central processing unit 11 acquires the radio field intensity of the terrestrial digital broadcast received from the other vehicle by inter-vehicle communication by the transceiver 22 (step 27). It is determined whether the strength is sufficient (step 28).
If the radio field intensity is sufficient (step 28; Y), the process returns to step 25, and the terrestrial digital broadcast relayed from another vehicle is received by the transceiver 22 (step 25).

  On the other hand, if the radio field intensity is not sufficient (step 28; N), the central processing unit 11 proceeds to step 23, and searches for another vehicle that can receive terrestrial digital broadcasting (step 23). Continue to receive broadcasts using other vehicles as repeaters.

  When the vehicle passes through the radio wave non-communication section and the vehicle can receive the terrestrial digital broadcast (step 26; Y), the central processing unit 11 proceeds to step 20 and the RF receiver 18 continues to receive digital terrestrial broadcasting.

Next, processing when the own vehicle performs broadcast relay according to a request from another vehicle will be described.
The terrestrial digital broadcast reception process described above is a process when the host vehicle receives a broadcast from a broadcast station or another vehicle.
On the other hand, in response to a request from another vehicle, the relay process relays the broadcast received by the own vehicle or the broadcast received from another other vehicle and transmits it to the requesting other vehicle. This is processing when the host vehicle functions as a relay machine, for example, processing when it functions as one of the other vehicles A to C in FIG.

  This relay process is processed independently of the terrestrial digital broadcast reception process by the host vehicle. The formation of the inter-vehicle local network is formed in advance by a local network connection request from another vehicle.

FIG. 5 is a flowchart showing the broadcast relay process.
The central processing unit 11 monitors whether or not there is a broadcast data transmission request (broadcast relay request) for terrestrial digital broadcasting from another vehicle (step 30).
When there is a transmission request (step 30; Y), the central processing unit 11 determines whether or not the radio wave intensity of the broadcast received by the RF receiver 18 is sufficient (step 31). (Step 31; Y), the received broadcast data is transmitted to the vehicle that requested the broadcast data via the transmitter / receiver 22 (step 32), and the process is terminated.

On the other hand, if the radio field intensity is not sufficient (step 31; N), it is determined whether there is another vehicle connected to the host vehicle other than the vehicle that has requested broadcasting (step 33).
If there is no other vehicle connected (step 33; N), the process is terminated. On the other hand, if another vehicle exists (step 33; Y), a broadcast data transmission request (relay) is sent to the other vehicle. Request) (step 34). The central processing unit 11 makes a further relay request to the other vehicle, and when broadcast data is transmitted from the other vehicle, transmits the received broadcast data to the vehicle that has made the relay request. To finish the process.

Next, a communication sequence for forming an inter-vehicle local network including the host vehicle and transmitting / receiving (relaying) broadcast data will be described.
FIG. 6 shows a communication sequence when the other vehicle C is in a state where it can be received from the broadcasting station between the host vehicle and the other vehicles A to C.
When the host vehicle is within a predetermined distance Nm from the radio wave non-interval section, the host vehicle requests a local network connection to the other vehicle A existing around the host vehicle. Based on this connection request, if the other vehicle A is connectable, it returns a local network connection permission to the own vehicle.
By this local network connection request and its permission, an inter-vehicle local network between the host vehicle and the other vehicle A is formed.

When the inter-vehicle local network with the other vehicle A is formed, a broadcast data transmission request (relay request) is transmitted from the own vehicle to the other vehicle A. This relay request includes data for specifying the broadcast content.
In other vehicles, it is determined whether reception from a broadcasting station is possible. In this example, since reception is not possible (the radio wave intensity is not sufficient), the other vehicle A further requests another vehicle B, which is another vehicle, to connect to the network, and the other vehicle B responds to this request. After receiving the network connection permission, the broadcast data transmission request received from the host vehicle is relayed and transmitted to the other vehicle B.

Since the other vehicle B in the example in this case cannot receive from the broadcasting station like the other vehicle A, a local network connection is made with the other vehicle C (request for network connection and permission). The broadcast data transmission request received from A is relayed and transmitted to the other vehicle C.
The other vehicle C determines whether or not reception from the broadcast station is possible based on the broadcast data transmission request transmitted from the other vehicle B, and in this example, reception is possible. Broadcast data transmitted to B and received by the RF receiver 18 is transmitted from the transceiver 22 to the other vehicle B.

In the other vehicle B, when the broadcast data is received by the transceiver 22 following the broadcast data transmission permission transmitted from the other vehicle C, the broadcast data received from the other vehicle C is transmitted after the broadcast data transmission permission is transmitted to the other vehicle A. It relays and transmits to the other vehicle A.
Similarly, in the other vehicle A, when the broadcast data is received by the transmitter / receiver 22 following the broadcast data transmission permission transmitted from the other vehicle B, the broadcast data received from the other vehicle B is transmitted after transmitting the broadcast data transmission permission to the own vehicle. Relay data and send it to your vehicle.

When the host vehicle receives broadcast data from another vehicle A that has requested transmission, the host vehicle stores the broadcast data in the hard disk 16 as necessary, and reproduces the broadcast data on the audio output device 15 or the monitor 20.
As described above, the transmission request (relay request) of broadcast data transmitted from the own vehicle is sequentially relayed to other vehicles that can be received by the RF receiver 18 from the terrestrial digital broadcasting station via the inter-vehicle local network and can be received. Broadcast data received by other vehicles is relayed to the host vehicle in the opposite direction of the requested relay route.
As a result, the host vehicle can receive the broadcast without interruption even when the vehicle is traveling in the radio wave non-communication zone.

Next, a communication sequence in the case where communication with another vehicle that has requested network connection is not possible will be described.
FIG. 7 shows a communication sequence when the other vehicle C is receivable from the broadcasting station and communication between the own vehicle and the other vehicle A is not possible. Note that description of sequence portions similar to those in FIG. 6 is omitted as appropriate.
In this case, the host vehicle requests a local network connection to the other vehicle A existing around the host vehicle. When connection failure is transmitted from the other vehicle A based on this connection request, the host vehicle transmits a local network connection request to another vehicle B again.
Since the other vehicle B can be connected based on this connection request, a vehicle-to-vehicle local network between the host vehicle and the other vehicle B is formed by returning a local network connection permission to the host vehicle. The vehicle transmits a broadcast data transmission request to the other vehicle B.

In the other vehicle B, as in the case of FIG. 6, the connection request and the broadcast data transmission request are made to the other vehicle C, and the broadcast data is received from the other vehicle C following the broadcast data transmission permission.
Then, the other vehicle B relays and transmits the broadcast data received from the other vehicle C to the host vehicle that has requested transmission to the other vehicle B.

The following effects can be obtained by the broadcast receiving apparatus of the present embodiment.
(1) Even if the broadcast data reception from the broadcasting station is interrupted by traveling in the radio wave non-interruptible section, all the broadcast data is received by receiving the interrupted broadcast data from other vehicles through inter-vehicle communication. Can be received continuously, and all broadcast data can be stored as necessary.
(2) In addition to requesting the other vehicle to relay the broadcast data, it can function as a broadcast data relay device for the other vehicle regardless of whether or not the vehicle receives the broadcast.

The embodiment of the broadcast receiving apparatus of the present invention has been described above. However, the present invention is not limited to the described embodiment, and various modifications can be made within the scope described in each claim. .
For example, in the embodiment described above, a case has been described in which a radio wave non-existing section existing on the travel route is detected from the vehicle current position and the radio wave intensity map database 17 for each radio non-interactive section.
On the other hand, a travel route from the departure place (current position) to the destination may be acquired, and all radio wave non-existing sections existing on the travel route may be set in advance.
In this case, the travel route to the destination is obtained by setting the destination by the navigation function of the host vehicle and searching for the route to the destination. By sending the departure point and the destination to the information center, the route at the information center is obtained. The searched travel route may be acquired from the information center.

It is explanatory drawing showing the outline | summary of the broadcast reception state by embodiment of this invention. It is a block diagram of a broadcast receiving apparatus. It is a flowchart showing the formation process of a vehicle-to-vehicle local network. It is a flowchart showing the reception process of the terrestrial digital broadcast by the own vehicle. It is a flowchart showing a broadcast relay process. This is a communication sequence when the other vehicle C is in a state where it can be received from the broadcast station between the host vehicle and the other vehicles A to C. This is a communication sequence in a case where the other vehicle C can receive from the broadcasting station and cannot communicate between the own vehicle and the other vehicle A.

Explanation of symbols

11 Central processing unit 12 Bus line 13 GPS receiver 14 Input device 15 Audio output device 16 Hard disk 17 Radio wave intensity map database 18 RF receiver 19 Radio wave intensity monitoring circuit 20 Monitor 21 Receiver 22 Transceiver

Claims (3)

First broadcast receiving means for receiving a broadcast;
A non-interruptible section acquisition means for acquiring a radio non-communication section that is present on a travel route and cannot receive the broadcast;
Network forming means for forming a local network with other vehicles capable of communication before traveling in the acquired radio wave non-interval section;
A second broadcast receiving means for receiving a broadcast from another vehicle via the formed local network, when the first broadcast receiving means cannot receive a broadcast;
Output means for outputting a broadcast received by the first broadcast receiving means or the second broadcast receiving means;
A broadcast receiving apparatus comprising:
The network forming means forms a local network in response to a request from another requesting vehicle,
Broadcast relay means for relaying the broadcast received by the first broadcast receiving means to the requesting vehicle via the formed local network in response to a request from the requesting vehicle;
The broadcast receiving apparatus according to claim 1, comprising:
The broadcast relay means receives the broadcast from another vehicle by the second broadcast receiving means when the first broadcast receiving means cannot receive the broadcast, and relays and transmits the broadcast to the requesting vehicle.
The broadcast receiving apparatus according to claim 2.

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