JP2022036459A - Transmission line integration device, broadcasting system, and transmission line integration method - Google Patents

Abstract

To realize stable information transmission while improving the resistance to a broadcast wave reception environment in a broadcast retransmission system that receives broadcast waves containing program information and retransmits them to other devices.SOLUTION: A transmission line integration device includes a receiving unit that receives IP packets obtained by packetizing, by following the same rule, streams contained in the same broadcast wave received by antennas at different points and passing through different transmission paths, a collation unit that collates each of the IP packets received by the receiving unit, a supplementary selection unit that supplements with the IP packet that has passed through the other transmission path and outputs the stream when the IP packet that has passed through the transmission path has a defect on the basis of the collation result of the collation unit, and a transmission unit that transmits the stream received from the supplementary selection unit in a predetermined format.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a transmission line integration device, a broadcasting system, and a transmission line integration method.

Conventionally, a technique for transmitting content using an MMTP (MPEG Media Transport Protocol) packet has been developed.

For example, ARIB STD-B32 3.4 version, "Video coding, audio coding and multiplexing method in digital broadcasting", Association of Radio Industries and Businesses, September 30, 2015 (Non-Patent Document 1) A broadcasting system using the MMT method is disclosed.

In this broadcasting system, an MMT packet containing program information such as audio information and video information is stored in the payload of the IP packet. The IP packet is stored in the payload of the TLV (Type Length Value) packet.

Further, Japanese Patent Application Laid-Open No. 2013-175949 (Patent Document 1) discloses the following techniques. That is, it is a transmission device that multiplex-transmits variable-length packets in a frame consisting of a plurality of packet placement slots for allocating TS (Transport Stream) packets and one slot for header information, and has the same size as the TS packet to be transmitted. A predetermined variable-length packet division unit that generates a third packet of packet length, divides the variable-length packet to be transmitted, and sequentially allocates the data of the divided variable-length packet to the third packet. An arrangement position for indicating a relative arrangement position in a frame for the TS packet and the third packet in order to transmit the TS packet and the third packet in a frame having a plurality of packet placement slots. A multi-frame header generator that generates multi-frame header information including information and head position information for indicating the head position of the variable-length packet, and one slot for the multi-frame header information are arranged in one frame. The TS packet and the third packet are arranged and multiplexed for each packet arrangement slot of the one frame, and the multiplexing unit configured as a plurality of TS multiplex frames and the multiplexing signal of the plurality of TS multiplex frames are externally arranged. It is provided with a transmission unit for transmitting to.

Japanese Unexamined Patent Publication No. 2013-175949

ARIB STD-B32 version 3.4, "Video coding, audio coding and multiplexing method in digital broadcasting", Association of Radio Industries and Businesses, September 30, 2015

In the technique described in Patent Document 1, the frame may be transmitted in a state where the TS packet has a loss due to the influence of the reception environment of the broadcast wave or the like. In a broadcast retransmission system that receives broadcast waves containing program information and retransmits them to other devices, a technology that can realize stable information transmission while improving the resistance to the broadcast wave reception environment is desired. ..

This disclosure is made in order to solve the above-mentioned problems, and improves the resistance to the reception environment of the broadcast wave in the broadcast retransmission system that receives the broadcast wave containing the program information and retransmits it to another device. The present invention is to provide a transmission line integration device, a broadcasting system, and a transmission line integration method capable of realizing stable information transmission.

The transmission path integration device of the present disclosure is an IP packet in which streams contained in the same broadcast wave received by antennas at different points are packetized according to the same rule, and the plurality of IP packets that have passed through different transmission paths from each other. When there is a defect in the IP packet that has passed through the transmission path based on the collation result of the receiving unit that receives the message, the collating unit that collates each IP packet received by the receiving unit, and the collating unit. It also includes a replenishment selection unit that supplements with the IP packet that has passed through the other transmission path and outputs the stream, and a transmission unit that transmits the stream received from the replenishment selection unit in a predetermined format.

The broadcasting system of the present disclosure is provided at different points, receives the same broadcasting wave, generates an IP packet constituting a stream included in the received broadcasting wave according to the same rule, and transmits the generated IP packet. Each of the IP packets transmitted from the plurality of IP retransmission devices and the plurality of IP retransmission devices and passing through different transmission paths is received, the received IP packets are collated with each other, and based on the collation result. When the IP packet that has passed through the transmission path has a defect, the stream is configured by supplementing the IP packet that has passed through another transmission path, and the configured stream is transmitted in a predetermined format. And.

The transmission path integration method of the present disclosure is an IP packet in which a stream contained in the same broadcast wave received by an antenna at a different point is packetized according to the same rule, and a plurality of the IP packets passing through different transmission paths from each other. If there is a defect in the IP packet that has passed through the transmission path based on the step of collating the received IP packets with each other and the collation result, the IP packet that has passed through the other transmission path. A step of forming the stream by supplementing the above and a step of transmitting the configured stream in a predetermined format are included.

One aspect of the present disclosure can be realized not only as a transmission line integration device provided with such a characteristic processing unit, but also as a semiconductor integrated circuit that realizes a part or all of the transmission line integration device. A method that can be realized as a program for causing a computer to execute a processing step in a transmission line integrated device, can be realized as a semiconductor integrated circuit that realizes a part or all of a broadcasting system, or a processing step in a broadcasting system. It can be realized as a program for causing a computer to execute a processing step in a broadcasting system.

According to the present disclosure, in a broadcast retransmission system that receives a broadcast wave containing program information and retransmits it to another device, it is possible to realize stable information transmission while improving the resistance to the broadcast wave reception environment. can.

FIG. 1 is a diagram showing a comparative example of a configuration of a broadcasting system according to an embodiment of the present disclosure. FIG. 2 is a diagram showing an example of the configuration of the broadcasting system according to the embodiment of the present disclosure. FIG. 3 is a diagram showing a configuration of a transmission line integrated device according to an embodiment of the present disclosure. FIG. 4 is a diagram showing an example of an IP packet received by a receiving unit of the transmission line integrating device according to the embodiment of the present disclosure. FIG. 5 is a diagram showing an example of detection processing by the collation unit of the transmission line integration device according to the embodiment of the present disclosure. FIG. 6 is a diagram showing an example of update processing by the number update unit of the transmission line integration device according to the embodiment of the present disclosure. FIG. 7 is a diagram showing an example of a confirmation process by a collation unit and an update process by a number update unit of the transmission line integration device according to the embodiment of the present disclosure. FIG. 8 is a diagram showing another example of the confirmation process by the collation unit and the update process by the number update unit of the transmission line integration device according to the embodiment of the present disclosure. FIG. 9 is a diagram showing another example of the confirmation process by the collation unit and the update process by the number update unit of the transmission line integration device according to the embodiment of the present disclosure. FIG. 10 is a diagram showing an example of output processing by the replenishment selection unit of the transmission line integration device according to the embodiment of the present disclosure. FIG. 11 is a flowchart defining an example of an operation procedure when the transmission line integrating device according to the embodiment of the present disclosure transmits a stream. FIG. 12 is a diagram showing an example of a processing sequence in the broadcasting system according to the embodiment of the present disclosure.

First, the contents of the embodiments of the present disclosure will be listed and described.

(1) The transmission line integration device according to the embodiment of the present disclosure is an IP packet in which streams included in the same broadcast wave received by antennas at different points are packetized according to the same rule, and transmissions different from each other. A receiving unit that receives a plurality of the IP packets that have passed through the route, a collating unit that collates each of the IP packets received by the receiving unit, and a collating unit that collates the IP packets received by the receiving unit. A replenishment selection unit that outputs the stream by supplementing it with the IP packet that has passed through the other transmission path when the IP packet is defective, and a transmission unit that transmits the stream received from the replenishment selection unit in a predetermined format. And.

In this way, by collating IP packets that have passed through different transmission paths based on the same broadcast wave received at different points and transmitting them in a complementary manner, a redundant configuration for the broadcast wave reception environment is realized and the same. By using the IP packets from each transmission path packetized according to the rules, for example, it is possible to contribute to the prevention of the loss of the stream for transmission. Therefore, in a broadcast retransmission system that receives a broadcast wave containing program information and retransmits it to another device, stable information transmission can be realized while improving the resistance of the broadcast wave reception environment.

(2) Preferably, the collation unit collates the payloads of the IP packets that have passed through each transmission path, and confirms the sequence number included in the IP packets.

With such a configuration, for example, after determining the match of the IP packets passing through each transmission path, grasping the deviation of the sequence number between the IP packets passing through each transmission path, and confirming the match by a simple process. The continuity of IP packets can be monitored.

(3) More preferably, the collating unit resets the confirmation state of the sequence number when the arrival of the IP packet via the transmission path is interrupted, and confirms the sequence number when the arrival is resumed. Start from the initial state.

With such a configuration, it is possible to appropriately perform the sequence number confirmation process according to the situation in which an abnormality has occurred in the transmission path and the situation in which the transmission path has returned to normal.

(4) Preferably, the transmission line integration device further includes a number update unit that updates the sequence number of the IP packet by adding or subtracting the sequence number included in the IP packet.

With such a configuration, the sequence number included in the IP packet can be updated with the sequence number that absorbs the difference in the arrival timing of the IP packet from each transmission path. Therefore, the assigned sequence number can be used to update the sequence number of the IP packet. Completion can be done with a simple process.

(5) Preferably, the replenishment selection unit performs at least one of an operation of preferentially selecting the IP packet that has passed through any one of the transmission paths and an operation of dynamically selecting the transmission path. It is possible.

With such a configuration, it is possible to appropriately select a transmission path according to the arrival status of the IP packet passing through each transmission path and complement the IP packet.

(6) The broadcasting system according to the embodiment of the present disclosure is provided at different points, receives the same broadcast wave, and generates an IP packet constituting a stream included in the received broadcast wave according to the same rule. A plurality of IP retransmitting devices for transmitting the generated IP packets and each of the IP packets transmitted from the plurality of IP retransmitting devices and passing through different transmission paths are received, and the received IP packets are exchanged with each other. When collation is performed and the IP packet that has passed through the transmission path has a defect based on the collation result, the stream is configured by supplementing with the IP packet that has passed through another transmission path, and the configured stream is designated as a predetermined value. It is equipped with a transmission line integration device that transmits in format.

In this way, by collating IP packets that have passed through different transmission paths based on the same broadcast wave received at different points and transmitting them in a complementary manner, a redundant configuration for the broadcast wave reception environment is realized and the same. By using the IP packets from each transmission path packetized according to the rules, for example, it is possible to contribute to the prevention of the loss of the stream for transmission. Therefore, in a broadcast retransmission system that receives a broadcast wave containing program information and retransmits it to another device, stable information transmission can be realized while improving the resistance of the broadcast wave reception environment.

(7) The transmission path integration method according to the embodiment of the present disclosure is an IP packet in which streams included in the same broadcast wave received by antennas at different points are packetized according to the same rule, and transmissions different from each other. A step of receiving a plurality of the IP packets via the route, a step of collating each received IP packet with each other, and another step when the IP packet via the transmission path is defective based on the collation result. It includes a step of supplementing with the IP packet passing through the transmission path to form the stream, and a step of transmitting the configured stream in a predetermined format.

In this way, by collating IP packets that have passed through different transmission paths based on the same broadcast wave received at different points and transmitting them in a complementary manner, a redundant configuration for the broadcast wave reception environment is realized and the same. By using the IP packets from each transmission path packetized according to the rules, for example, it is possible to contribute to the prevention of the loss of the stream for transmission. Therefore, in a broadcast retransmission system that receives a broadcast wave containing program information and retransmits it to another device, stable information transmission can be realized while improving the resistance of the broadcast wave reception environment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals and the description thereof will not be repeated. In addition, at least a part of the embodiments described below may be arbitrarily combined.

[Configuration and basic operation]
FIG. 1 is a diagram showing a comparative example of a configuration of a broadcasting system according to an embodiment of the present disclosure.

With reference to FIG. 1, the broadcasting system 301 includes an IP retransmission device 201 and a program distribution device 202.

The IP retransmission device 201 and the router 121 are provided in, for example, the IPTV center 251.

The program distribution device 202 and the router 122 are provided in, for example, a transmission center 252 built in an area away from the IPTV center 251.

The ONU (Optical Network Unit) 123, STB (Set Top Box) 131, and TV monitor 133 are provided in the subscriber's home 152. The STB 131 includes an IP broadcast receiving device 203.

The STB 132 and the TV monitor 133 are provided in the subscriber's house 153. The STB 134 includes a cable television broadcast receiving device 204.

For example, an external antenna 81 is connected to the IP retransmission device 201. The IP retransmission device 201 receives, for example, a broadcast wave including a stream.

The stream contains program information and the like. The program information includes, for example, audio information, video information, EPG (Electronic Program Guide) information, SI information (Service Information), subtitle information, and the like.

The audio and video information is, for example, compressed and encrypted according to a predetermined method.

The IP retransmission device 201 receives, for example, a broadcast wave transmitted from a broadcasting satellite for advanced wideband satellite digital broadcasting (not shown) for relaying a stream from a broadcasting station via an external antenna 81.

The IP retransmission device 201 may, for example, receive the broadcast wave transmitted from the radio tower via the external antenna 81.

For example, the broadcast wave includes TMCC (Transmission and Multiplexing Configuration Control) information, AC (Auxiliary Channel) information, and TS packets.

The TS packet is often used for transmission of HDTV (High Definition Television) or SDTV (Standard Definition Television) according to a standard such as 1080i, 720p or 480p. The TS packet may be used for transmission of 4K UHDTV (Ultra High Definition Television), 8K UHDTV, or the like.

The IP retransmission device 201 acquires program information from the received broadcast wave, and stores the acquired program information in an IP packet. Then, the IP retransmission device 201 transmits an IP packet containing program information to each subscriber's home 152 and the program distribution device 202.

More specifically, the IP retransmission device 201 generates a TTS packet in which transmission time information such as a time stamp indicating the transmission timing of the TS packet is added to the TS packet included in the received broadcast wave stream. Then, the IP retransmission device 201 generates and transmits an IP packet containing one or a plurality of generated TTS packets.

The broadcast wave may include a TLV packet instead of the TS packet. In this case, the IP retransmission device 201 performs a division process to generate a plurality of TS packets in which the data of one or a plurality of TLV packets included in the received broadcast wave stream is divided and stored, and the generated TS packets. A TTS packet to which transmission time information such as a time stamp indicating the transmission timing of the TS packet is added is generated. Then, the IP retransmission device 201 generates and transmits an IP packet containing one or a plurality of generated TTS packets.

The IP retransmission device 201, for example, sets the destination of the IP packet to an IP multicast address that reaches the plurality of subscriber homes 152 and the program distribution device 202, and transmits the IP packet to the router 121.

The router 121 is, for example, an IP multicast router, and when it receives an IP packet from the IP retransmission device 201, it transmits the received IP packet to an IPTV transmission network (CDN: Content Delivery Network) 451 which is an example of a communication line. .. In the IPTV transmission network 451 for example, IP packets are transmitted according to the IP protocol. The communication line may be another communication line such as the Internet.

The ONU 123 in the subscriber's house 152 receives, for example, an IP packet transmitted from the IP retransmission device 201 by a communication service of FTTH (Fiber To The Home).

More specifically, the ONU 123 is a home-side device in, for example, GPON (Gigabit Passive Optical Network) and GE-PON (Gigabit Ethernet®-PON).

When the ONU 123 receives an IP packet from the IPTV transmission network 451 via an optical communication line, the ONU 123 transmits the received IP packet to the STB 131.

The IP broadcast receiving device 203 in the STB 131 receives an IP packet from the ONU 123, acquires program information from the received IP packet, decodes audio information and video information based on the acquired program information, and decodes the audio after decoding. Information and video information are transmitted to the TV monitor 133.

The TV monitor 133 reproduces a program based on the audio information and the video information received from the IP broadcast receiving device 203.

The program distribution device 202 receives the IP packet transmitted from the IP retransmission device 201 via the router 121, the IPTV transmission network 451 and the router 122, acquires program information from the received IP packet, and acquires program information. A distribution wave containing information is generated and transmitted to each subscriber's house 153.

More specifically, the program distribution device 202 acquires one or more TTS packets included in the payload of the received IP packet, and generates one or more TLV packets from the acquired one or more TTS packets.

Then, the program distribution device 202 generates a stream in which the generated one or a plurality of TLV packets are stored, and adds TMCC information to the generated stream to generate a frame including the program information.

Then, the program distribution device 202 modulates the generated frame, converts the frequency of the modulated frame into a frequency corresponding to, for example, a cable television network 452 to generate a distribution wave, and the generated distribution wave is converted into, for example, a cable television network. It is transmitted to each subscriber's house 153 via 452.

The STB 132 in the subscriber's house 153 receives, for example, the distribution wave transmitted from the program distribution device 202 via the cable television network 452.

More specifically, when the cable television broadcast receiving device 204 in the STB 132 receives the distribution wave from the program distribution device 202, it acquires program information from the received distribution wave, and voice information and audio information based on the acquired program information. The video information is decoded, and the decoded audio information and video information are transmitted to the TV monitor 133.

The TV monitor 133 reproduces a program based on the audio information and the video information received from the cable television broadcast receiving device 204.

[Task]
In the conventional broadcasting system 301 as described above, if the reception environment of the broadcast wave in the IP retransmission device 201 is not good due to the influence of the climate of the area where the IPTV center 251 is built, a loss occurs in the TS packet. In this state, the IP retransmission device 201 may transmit the stream.

On the other hand, in the broadcasting system according to the embodiment of the present disclosure, the above-mentioned problems are solved by the following configurations and operations.

[Broadcasting system]
FIG. 2 is a diagram showing an example of the configuration of the broadcasting system according to the embodiment of the present disclosure.

With reference to FIG. 2, the broadcasting system 302 includes IP retransmission devices 201A and 201B as IP retransmission devices 201 as compared with the broadcasting system 301 shown in FIG. 1, and is a transmission line integration device instead of the program distribution device 111. 101 is provided. The broadcasting system 301 is not limited to the configuration including the two IP retransmission devices 201, but may be configured to include three or more IP retransmission devices 201.

The router 121A, which is the router 121, and the IP retransmission device 201A, which is the IP retransmission device 201, are provided in, for example, the IPTV center 251A which is the IPTV center 251. Further, the router 121B which is the router 121 and the IP retransmission device 201B which is the IP retransmission device 201 are provided in, for example, the IPTV center 251B which is the IPTV center 251. The transmission line integrating device 101 and the routers 122 and 222 are provided in the transmission center 252.

The IP retransmission devices 201A and 201B are provided at different points, for example, in different areas. More specifically, the IPTV Center 251A and the IPTV Center 251B are built at different points, for example, in different areas.

For example, an external antenna 81A, which is an external antenna 81, is connected to the IP retransmission device 201A. Further, for example, an external antenna 81B, which is an external antenna 81, is connected to the IP retransmission device 201B. The external antennas 81A and 81B are provided at different points, for example, in different areas.

The IP retransmission devices 201A and 201B receive the same broadcast wave. More specifically, the IP retransmission devices 201A and 201B receive broadcast waves transmitted from the same broadcasting satellite or the same radio tower via the corresponding external antenna 81.

The IP retransmission devices 201A and 201B generate IP packets P constituting a stream included in the received broadcast wave according to the same rule.

More specifically, the IP retransmission devices 201A and 201B generate a TTS packet in which transmission time information such as a time stamp indicating the transmission timing of the TS packet is added to the TS packet included in the received broadcast wave stream. .. Then, the IP retransmission devices 201A and 201B generate IP packets P containing the same number of TTS packets, for example, six TTS packets.

Alternatively, the IP retransmission devices 201A and 201B perform a division process to generate a plurality of TS packets in which the data of one or a plurality of TLV packets included in the received broadcast wave stream is divided and stored, and the generated TS is performed. A TTS packet is generated by adding transmission time information such as a time stamp indicating the transmission timing of the TS packet to the packet. Then, the IP retransmission devices 201A and 201B generate IP packets P containing the same number of, for example, six TTS packets.

As will be described later, the IP retransmission devices 201A and 201B generate an IP packet P including a sequence number. While the IP retransmission devices 201A and 201B generate IP packets P constituting a stream included in the same broadcast wave according to the same rule, the timing of starting the generation of the IP packet P may be different. In this case, the IP packets P generated by the IP retransmission devices 201A and 201B may have different sequence numbers from each other even though the stored payloads are the same.

The IP retransmission devices 201A and 201B transmit the generated IP packet P via different transmission paths.

More specifically, the IP retransmission device 201A sets the destination of the IP packet P to an IP multicast address that reaches the subscriber's house 152A, which is the subscriber's house 152, and the transmission line integration device 101, and sets the destination to the router 121A. Send. Further, the IP retransmission device 201B sets the destination of the IP packet P to an IP multicast address that reaches the subscriber's house 152B, which is the subscriber's house 152, and the transmission line integration device 101, and transmits the IP packet P to the router 121B.

Hereinafter, the IP packet P transmitted by the IP retransmission device 201A is also referred to as an IP packet PA, and the IP packet P transmitted by the IP retransmission device 201B is also referred to as an IP packet PB.

The router 121A receives the IP packet PA from the IP retransmission device 201A, and transmits the received IP packet PA to the IPTV transmission network 451A which is the IPTV transmission network 451. Further, the router 121B receives the IP packet PB from the IP retransmission device 201B, and transmits the received IP packet PB to the IPTV transmission network 451B which is the IPTV transmission network 451.

The transmission line integration device 101 receives IP packets PA and PB transmitted from the IP retransmission devices 201A and 201B and via different transmission paths.

More specifically, the transmission line integration device 101 receives the IP packet PA transmitted from the IP retransmission device 201A via the router 121A, the IPTV transmission network 451A, and the router 122. Further, the transmission line integration device 101 receives the IP packet PB transmitted from the IP retransmission device 201B via the router 121B, the IPTV transmission network 451B, and the router 122.

The transmission path integration device 101 collates the received IP packets P with each other, and based on the collation result, if the IP packet P passing through a certain transmission path is defective, the IP packet P passing through another transmission path compensates for the defect. Configure the stream.

More specifically, the transmission line integrating device 101 collates the IP packet PA with the IP packet PB, and if the IP packet PA among the IP packet PA and PB is defective, the transmission path integrating device 101 supplements the IP packet PA with the IP packet PB to form a stream. do. Further, the transmission line integration device 101 collates the IP packet PA with the IP packet PB, and if the IP packet PB among the IP packet PA and PB is defective, the transmission path integration device 101 supplements the IP packet PA with the IP packet PA to form a stream.

The transmission line integration device 101 transmits the configured stream in a predetermined format.

More specifically, the transmission line integration device 101 transmits the IP packet P constituting the stream to the subscriber's home 152C, which is the subscriber's home 152, via the router 222, the IPTV transmission network 453, and the optical communication line.

Further, the transmission line integrating device 101 generates a frame based on the IP packet P constituting the stream, modulates the generated frame, and converts the frequency of the modulated frame into a frequency corresponding to, for example, a cable television network 452. The generated distribution wave is generated, and the generated distribution wave is transmitted to each subscriber's house 153 via, for example, a cable television network 452.

[Transmission line integration device]
FIG. 3 is a diagram showing a configuration of a transmission line integrated device according to an embodiment of the present disclosure.

With reference to FIG. 3, the transmission line integrating device 101 includes a receiving unit 10, a collating unit 20, a number updating unit 30, a supplementary selection unit 40, a transmitting unit 50, and FIFO 60A and 60B. The receiving unit 10 includes an IP receiving unit 11A and an IP receiving unit 11B. The number updating unit 30 includes an addition / subtraction unit 31A and an addition / subtraction unit 31B. Hereinafter, each of FIFA 60A and 60B is also referred to as FIFA 60.

[Receiver]
The receiving unit 10 is an IP packet P in which streams included in the same broadcast wave received by external antennas 81 at different points are packetized according to the same rule, and a plurality of IP packets P passing through different transmission paths are received. Receive.

More specifically, the IP receiving unit 11A receives the IP packet PA from the IPTV transmission network 451A via the router 122.

Further, the IP receiving unit 11B receives the IP packet PB from the IPTV transmission network 451B via the router 122.

FIG. 4 is a diagram showing an example of an IP packet received by a receiving unit of the transmission line integrating device according to the embodiment of the present disclosure.

With reference to FIG. 4, the IP packet P includes an IP header, a UDP (User Datagram Protocol) header, an RTP (Real-time Transport Protocol) header, a payload and an FCS (Frame Check Sequence). The payload contains, for example, six TTS packets generated by the IP retransmission device 201.

The RTP header includes version, padding, extension, CSRC count, marker, payload type, sequence number, time stamp, and SSRC identifier.

With reference to FIG. 3 again, the IP receiving unit 11A outputs the received IP packet PA to the FIFA 60A. Further, the IP receiving unit 11B outputs the received IP packet PB to the FIFO 60B.

The FIFO 60A receives the IP packet PA from the IP receiving unit 11A and stores the received IP packet PA in an internal memory (not shown). The FIFO 60A outputs the earliest accumulated IP packet PA of one or a plurality of IP packet PAs in the memory to the addition / subtraction unit 31A in the number update unit 30 in synchronization with or asynchronously with the write clock to the memory. ..

The FIFO 60B receives the IP packet PB from the IP receiving unit 11B and stores the received IP packet PB in an internal memory (not shown). The FIFO 60B outputs the IP packet PB accumulated first among one or a plurality of IP packet PBs in the memory to the addition / subtraction unit 31B in the number update unit 30 in synchronization with or asynchronously with the write clock to the memory. ..

[Collation unit]
The collation unit 20 collates each IP packet P received by the reception unit 10. More specifically, the collation unit 20 collates the IP packet PA stored in the FIFA 60A with the IP packet PB stored in the FIFA 60B.

For example, the collation unit 20 collates the payloads of the IP packets PA and PB, and confirms the sequence numbers included in the IP packet PA and PB.

More specifically, the collation unit 20 collates the IP packets PA and PB by collating the payloads of the IP packets PA and PB. Specifically, the collating unit 20 collates the payload of the IP packet PA stored in the FIFO 60A with the payload of the IP packet PB stored in the FIFA 60B, so that the pair of IP packets PA and PB having the same payload is matched. Performs detection processing to detect. When the collating unit 20 detects a pair of IP packets PA and PB having the same payload, the collating unit 20 ends the detection process.

The collating unit 20 compares the sequence numbers of the IP packet PAs and PBs in the set detected in the detection process, that is, the IP packet PAs and PBs that have passed through each transmission path. More specifically, the collation unit 20 calculates the difference between the sequence number of the IP packet PA and the sequence number of the IP packet PB, and outputs the difference information indicating the calculated difference to the number update unit 30.

Further, after the detection process is completed, the collation unit 20 continues collating the payload of the IP packet PA with the IP packet PB and confirming the sequence numbers of the IP packet PA and PB. More specifically, the collating unit 20 confirms the payload collation and the continuity of the sequence number of the IP packet PA / PB set stored in the FIFO 60 after the IP packet PA / PB set having the same payload. Perform confirmation processing.

For example, as a confirmation process, the collating unit 20 performs the payload of the IP packet PA stored in the FIFO 60A next to the IP packet PA in the set of IP packets PA and PB having the same payload, and the payload of the IP packet PA in the set next to the IP packet PB. A match confirmation process for collating with the payload of the IP packet PB stored in the FIFA 60B is performed.

Further, for example, as a confirmation process, the collation unit 20 confirms whether or not the sequence number included in the IP packet PA is a serial number and whether or not the sequence number included in the IP packet PB is a serial number. Performs serial number confirmation processing. Specifically, the collation unit 20 confirms whether or not the sequence number included in the IP packet PA is incremented by 1, and whether or not the sequence number included in the IP packet PB is incremented by 1.

For example, the collation unit 20 resets the confirmation state of the sequence number when the arrival of the IP packet P is interrupted, and starts the confirmation of the sequence number from the initial state when the arrival of the IP packet P is resumed.

More specifically, if the IP packet P is not accumulated in the FIFA 60 for a predetermined period in the state where the confirmation process is being performed, the collation unit 20 performs the detection process again. Then, after the detection process is completed, the collation unit 20 performs a serial number confirmation process using each sequence number of the IP packets PA and PB whose payload detected in the detection process matches as an initial value.

[Number update section]
The number update unit 30 performs an update process for updating the sequence number of the IP packet P by adding or subtracting the sequence number included in the IP packet P.

For example, the number updating unit 30 calculates a sequence number to be newly assigned instead of the sequence number of the IP packet P based on the comparison result of the sequence number of the IP packet P by the collating unit 20.

More specifically, the number updating unit 30 receives the difference information from the collation unit 20, and based on the received difference information, assigns a new sequence number to at least one of the IP packets PA and PB, so that the payload is generated. Match the sequence numbers of matching IP packets PA and PB.

Specifically, when any one of the addition / subtraction units 31A and 31B in the number update unit 30 receives the difference information from the collation unit 20, the difference indicated by the difference information is added to the sequence number of the IP packet P received from the FIFA 60. Alternatively, the subtracted sequence number is newly added to the IP packet P.

(Detection processing)
FIG. 5 is a diagram showing an example of detection processing by the collation unit of the transmission line integration device according to the embodiment of the present disclosure.

With reference to FIG. 5, for example, the FIFO 60A stores the IP packet PA01 which is the IP packet PA received from the IP receiving unit 11A. Further, for example, the FIFO 60B stores the IP packet PB01 which is the IP packet PB received from the IP receiving unit 11B. The sequence number of the IP packet PA01 is "0x0017", and the sequence number of the IP packet PB01 is "0x0047". Here, the numbers starting with "0x" mean that the numbers after "0x" are represented by hexadecimal numbers.

For example, in the detection process, the collating unit 20 uses, for example, the IP packet PA01 stored first among the IP packet PAs stored in the FIFA 60A as a reference IP packet, and the collating unit 20 uses the IP packet PB stored in the FIFA 60B as a reference IP packet. An IP packet PB containing the same payload as the payload of the reference IP packet is searched for.

When starting the detection process, the collation unit 20 outputs an output stop instruction indicating that the output of the IP packet P should be stopped to the FIFO 60A in which the IP packet PA01 which is a reference IP packet is stored.

The collating unit 20 collates the payload of the IP packet PA01 with the payload of the IP packet PB01, and if the payload of the IP packet PB01 does not match the payload of the IP packet PA01, the collating unit 20 waits for a new IP packet PB stored in the FIFA 60B. ..

Next, the FIFA 60A receives the IP packet PA02, which is a new IP packet PA, from the IP receiving unit 11A, and accumulates the received IP packet PA02. Further, the FIFO 60B receives the IP packet PB02, which is a new IP packet PB, from the IP receiving unit 11B, and accumulates the received IP packet PB02. The sequence number of the IP packet PA02 is "0x0018", and the sequence number of the IP packet PB02 is "0x0048".

The FIFO 60A does not output the IP packet PA01 according to the output stop instruction received from the collating unit 20. On the other hand, the FIFA 60B outputs the IP packet PB01 to the addition / subtraction unit 31B according to the timing of the read clock.

The collating unit 20 collates the payload of the IP packet PA01 with the payload of the new IP packet PB02 stored in the FIFA 60B, and if the payload of the IP packet PB02 does not match the payload of the IP packet PA01, it is stored in the FIFA 60B. Waits for a new IP packet PB.

Next, the FIFA 60A receives the IP packet PA03, which is a new IP packet PA, from the IP receiving unit 11A, and accumulates the received IP packet PA03. Further, the FIFO 60B receives the IP packet PB03, which is a new IP packet PB, from the IP receiving unit 11B, and accumulates the received IP packet PB03. The sequence number of the IP packet PA02 is "0x0019", and the sequence number of the IP packet PB02 is "0x0049".

The FIFO 60A does not output the IP packet PA01 according to the output stop instruction received from the collating unit 20. On the other hand, the FIFA 60B outputs the IP packet PB02 to the addition / subtraction unit 31B according to the timing of the read clock.

The collating unit 20 collates the payload of the IP packet PA01 with the payload of the new IP packet PB03 stored in the FIFA 60B, and if the payload of the IP packet PB03 matches the payload of the IP packet PA01, the payload matches the IP. Since the set of packets PA01 and PB03 has been detected, the detection process is terminated.

Further, the collation unit 20 calculates the difference between the sequence number “0x0017” of the IP packet PA01 and the sequence number “0x0049” of the IP packet PB03, and indicates the calculated difference “0x0032”. The difference information is output to the addition / subtraction units 31A and 31B.

The collation unit 20 ends the detection process, outputs the difference information to the addition / subtraction units 31A and 31B, and then outputs an output restart instruction to the FIFA 60A indicating that the output of the IP packet PA should be restarted.

The FIFO 60A receives an output restart instruction from the collating unit 20 and outputs the IP packet PA01 to the addition / subtraction unit 31A according to the timing of the read clock.

If the payload of the IP packet PB03 does not match the payload of the IP packet PA01, the collation unit 20 accumulates the IP packet PB in the FIFA 60B until it detects an IP packet PB containing the same payload as the payload of the IP packet PA01. Each time, the payload of the IP packet PA01 is repeatedly matched with the payload of the new IP packet PB stored in the FIFO 60B.

When the collating unit 20 cannot detect the IP packet PB containing the same payload as the payload of the IP packet PA01 within a predetermined time after the start of the detection process using the IP packet PA01 as the reference IP packet, the collating unit 20 of the IP packet PA01 Instead, the detection process is performed using, for example, the IP packet PB stored first among the IP packet PBs stored in the FIFO 60B as a reference IP packet.

When the collating unit 20 uses the IP packet PB as a reference IP packet instead of the IP packet PA01 for detection processing, the collating unit 20 outputs an output stop instruction indicating that the output of the IP packet PB should be stopped to the FIFA 60B, and also outputs the IP. An output restart instruction indicating that the output of the packet PA should be restarted is output to the FIFA 60A.

(Update process)
FIG. 6 is a diagram showing an example of update processing by the number update unit of the transmission line integration device according to the embodiment of the present disclosure.

With reference to FIG. 6, for example, the addition / subtraction unit 31A receives the IP packet PA01 from the FIFA 60A after receiving the difference information from the collation unit 20, and the difference information is set to “0x0017” which is the sequence number of the received IP packet PA01. "0x0049", which is a sequence number obtained by adding the difference indicated by "0x0032", is newly added to the IP packet PA01. When the addition / subtraction unit 31A assigns "0x0049" as the sequence number to the IP packet PA01, the addition / subtraction unit 31A outputs the IP packet PA01 to the supplement selection unit 40.

After receiving the difference information from the collation unit 20, the addition / subtraction unit 31B in the number update unit 30 receives the IP packet PB03 from the FIFA 60B, does not assign a new sequence number to the received IP packet PB03, and does not assign a new sequence number to the received IP packet PB03. Is output to the replenishment selection unit 40.

(Confirmation process)
FIG. 7 is a diagram showing an example of a confirmation process by a collation unit and an update process by a number update unit of the transmission line integration device according to the embodiment of the present disclosure.

With reference to FIG. 7, for example, the FIFO 60A and 60B accumulate new IP packets PA14 and PB14, respectively, while the collating unit 20 confirms that the payloads match each other and the sequence numbers are consecutive numbers. The IP packets PA11 and PB13 are output to the addition / subtraction units 31A and 31B, respectively.

The addition / subtraction unit 31A receives the IP packet PA11 from the FIFA 60A, and adds the difference indicated by the difference information received from the collating unit 20 to the sequence number “0x0021” of the received IP packet PA11 “0x0053”. Is newly added to the IP packet PA11, and the IP packet PA11 is output to the replenishment selection unit 40.

The addition / subtraction unit 31B receives the IP packet PB13 from the FIFA 60B, does not assign a new sequence number to the received IP packet PB13, and outputs the IP packet PB13 to the replenishment selection unit 40.

For example, the collation unit 20 performs a match confirmation process to obtain the payload of the IP packet PA12 stored in the FIFA 60A next to the IP packet PA11 and the payload of the IP packet PB 14 stored in the FIFA 60B next to the IP packet PB13. Make sure that matches.

Further, for example, the collation unit 20 performs the serial number confirmation process so that the sequence number “0x0022” of the IP packet PA 12 is an incremented number of the sequence number “0x0021” of the IP packet PA 11. And it is confirmed that "0x0054" which is the sequence number of the IP packet PB14 is a number obtained by incrementing "0x0053" which is the sequence number of the IP packet PB13.

Next, the FIFO 60A and 60B accumulate new IP packets PA15 and PB15, respectively, while outputting the IP packets PA12 and PB14 to the addition / subtraction units 31A and 31B, respectively.

The addition / subtraction unit 31A receives the IP packet PA12 from the FIFA 60A, and adds the difference indicated by the difference information received from the collating unit 20 to the sequence number “0x0022” of the received IP packet PA12 “0x0054”. Is newly added to the IP packet PA12, and the IP packet PA12 is output to the replenishment selection unit 40.

The addition / subtraction unit 31B receives the IP packet PB14 from the FIFA 60B, does not assign a new sequence number to the received IP packet PB14, and outputs the IP packet PB14 to the replenishment selection unit 40.

For example, the collation unit 20 performs a match confirmation process to obtain the payload of the IP packet PA13 stored in the FIFA 60A next to the IP packet PA12 and the payload of the IP packet PB15 stored in the FIFA 60B next to the IP packet PB14. Make sure that matches.

Further, for example, the collation unit 20 performs the serial number confirmation process so that the sequence number “0x0023” of the IP packet PA13 is a number obtained by incrementing the sequence number “0x0022” of the IP packet PA12. On the other hand, it is confirmed that the sequence number "0x0000" of the IP packet PB15 is not a number obtained by incrementing the sequence number "0x0054" of the IP packet PB14, that is, the sequence number of the IP packet PB15 is not a continuous number. Detect.

The collation unit 20 detects that the payloads of the collated IP packets PA13 and PB15 match in the match confirmation process, and is included in the IP packet PB15 in the set of the IP packets PA13 and PB15 in the serial number confirmation process. When it is detected that the sequence number is not a continuous number, the difference between the sequence number of the IP packet PB15 and the sequence number of the IP packet PB14 stored in the FIFO 60B immediately before the IP packet PB15 is calculated. The collation unit 20 outputs serial number difference information indicating “0x0055”, which is a value obtained by adding 1 to the calculated difference, to the addition / subtraction unit 31B in the number update unit 30.

Next, the FIFO 60A and 60B accumulate new IP packets PA16 and PB16, respectively, while outputting the IP packets PA13 and PB15 to the addition / subtraction units 31A and 31B, respectively.

The addition / subtraction unit 31A receives the IP packet PA13 from the FIFA 60A, and adds the difference indicated by the difference information received from the collating unit 20 to the sequence number “0x0023” of the received IP packet PA13 “0x0055”. Is newly added to the IP packet PA12, and the IP packet PA12 is output to the replenishment selection unit 40.

The addition / subtraction unit 31B receives the serial number difference information from the collation unit 20, and assigns a new sequence number to the IP packet PB15 based on the received serial number difference information, so that the IP packets PA13 and PB15 having the same payload are matched. Match the sequence numbers of. Specifically, the addition / subtraction unit 31B receives the IP packet PB15 from the FIFA 60B, and is a sequence number obtained by adding the difference indicated by the serial number difference information to the sequence number “0x0000” of the received IP packet PB15. "0x0055" is newly added to the IP packet PB15, and the IP packet PB15 is output to the replenishment selection unit 40.

Further, for example, the collation unit 20 detects that the payloads of the collated IP packets PA and PB match in the match confirmation process, and in the serial number confirmation process, the IP in the set of the IP packet PA and PB. When it is detected that the sequence number included in the packet PA is not a continuous number, the difference between the sequence number of the IP packet PA and the sequence number of the IP packet PA stored in the FIFO 60A immediately before the IP packet PA is calculated. The serial number difference information indicating the value obtained by adding 1 to the calculated difference is output to the addition / subtraction unit 31A in the number update unit 30.

The addition / subtraction unit 31A receives the serial number difference information from the collation unit 20, and assigns a new sequence number to the IP packet PA based on the received serial number difference information, so that the IP packet PAs and PBs having the same payloads are matched. Match the sequence numbers of. Specifically, for example, when the addition / subtraction unit 31A receives the serial number difference information from the collation unit 20, the sequence number obtained by adding the difference indicated by the serial number difference information to the sequence number of the IP packet PA received from the FIFA 60A is used. A new IP packet PA is added, and the IP packet PA is output to the replenishment selection unit 40.

FIG. 8 is a diagram showing another example of the confirmation process by the collation unit and the update process by the number update unit of the transmission line integration device according to the embodiment of the present disclosure.

With reference to FIG. 8, the FIFO 60A and 60B accumulate new IP packets PA15 and PB15, respectively, while outputting the IP packets PA12 and PB14 to the addition / subtraction units 31A and 31B, respectively.

The addition / subtraction unit 31A receives the IP packet PA12 from the FIFA 60A, and adds the difference indicated by the difference information received from the collating unit 20 to the sequence number “0x0022” of the received IP packet PA12 “0x0054”. Is newly added to the IP packet PA12, and the IP packet PA12 is output to the replenishment selection unit 40.

The addition / subtraction unit 31B receives the IP packet PB14 from the FIFA 60B, does not assign a new sequence number to the received IP packet PB14, and outputs the IP packet PB14 to the replenishment selection unit 40.

For example, the collation unit 20 performs a match confirmation process to obtain the payload of the IP packet PA13 stored in the FIFA 60A next to the IP packet PA12 and the payload of the IP packet PB15 stored in the FIFA 60B next to the IP packet PB14. Detects that they do not match.

Further, for example, the collation unit 20 performs the serial number confirmation process so that the sequence number “0x0023” of the IP packet PA13 is a number obtained by incrementing the sequence number “0x0022” of the IP packet PA12. On the other hand, it is confirmed that the sequence number "0x0000" of the IP packet PB15 is not a number obtained by incrementing the sequence number "0x0054" of the IP packet PB14, that is, the sequence number of the IP packet PB15 is not a continuous number. Detect.

The collation unit 20 detects that the payloads of the collated IP packets PA13 and PB15 do not match in the match confirmation process, and is included in at least one of the IP packets PA13 and PB15 in the serial number confirmation process. When it is detected that the sequence number is not a serial number, the detection process is restarted.

Next, the FIFO 60A and 60B accumulate new IP packets PA16 and PB16, respectively, while outputting the IP packets PA13 and PB15 to the addition / subtraction units 31A and 31B, respectively.

The addition / subtraction unit 31A receives the IP packet PA13 from the FIFA 60A, and adds the difference indicated by the difference information received from the collating unit 20 to the sequence number “0x0023” of the received IP packet PA13 “0x0055”. Is newly added to the IP packet PA13, and the IP packet PA13 is output to the replenishment selection unit 40.

The addition / subtraction unit 31B receives the IP packet PB15 from the FIFA 60B, does not assign a new sequence number to the received IP packet PB15, and outputs the IP packet PB15 to the replenishment selection unit 40.

FIG. 9 is a diagram showing another example of the confirmation process by the collation unit and the update process by the number update unit of the transmission line integration device according to the embodiment of the present disclosure.

With reference to FIG. 9, the FIFO 60A and 60B accumulate new IP packets PA15 and PB15, respectively, while outputting the IP packets PA12 and PB14 to the addition / subtraction units 31A and 31B, respectively.

The addition / subtraction unit 31A receives the IP packet PA12 from the FIFA 60A, and adds the difference indicated by the difference information received from the collating unit 20 to the sequence number “0x0022” of the received IP packet PA12 “0x0054”. Is newly added to the IP packet PA12, and the IP packet PA12 is output to the replenishment selection unit 40.

The addition / subtraction unit 31B receives the IP packet PB14 from the FIFA 60B, does not assign a new sequence number to the received IP packet PB14, and outputs the IP packet PB14 to the replenishment selection unit 40.

For example, the collation unit 20 performs the matching confirmation process to obtain the payload of the IP packet PA13 stored in the FIFA 60A next to the IP packet PA12 and the payload of the IP packet PB15 stored in the FIFA 60B next to the IP packet PB14. Detects that they do not match.

Further, for example, the collation unit 20 performs the serial number confirmation process so that the sequence number “0x0023” of the IP packet PA13 is a number obtained by incrementing the sequence number “0x0022” of the IP packet PA12. Confirm and confirm that the sequence number "0x0055" of the IP packet PB15 is an incremented number of the sequence number "0x0054" of the IP packet PB14.

The collation unit 20 detects that the payloads of the collated IP packets PA13 and PB15 do not match in the match confirmation process, and in the serial number confirmation process, the sequence number included in the IP packets PA13 and PB15 is a continuous number. When this is detected, for example, it is determined that an abnormality has occurred in the broadcasting system 302, the IP packets PA13 and PB15 are discarded, and the detection process is started again.

[Replenishment selection unit]
Based on the collation result of the collation unit 20, the replenishment selection unit 40 outputs a stream by supplementing with the IP packet P in another transmission path when the IP packet P in the transmission path is defective. For example, the supplementary selection unit 40 can perform an operation of preferentially selecting an IP packet P in any one transmission path and an operation of dynamically selecting a transmission path.

More specifically, the replenishment selection unit 40 receives IP packets PA and PB from the number update unit 30, and is an IP packet P to be output to the transmission unit 50 from the received IP packets PA and PB for transmission. The IP packet PS is selected, and the selected transmission IP packet PS is output to the transmission unit 50.

For example, if the IP packet PA is missing, the sequence number of the IP packet PA will no longer be a serial number. Further, for example, when the IP packet PB is missing, the sequence number of the IP packet PB is not a serial number.

The replenishment selection unit 40 uses the IP packet PA, IP packet PA, so that the sequence number of the transmission IP packet PS to be transmitted to the transmission unit 50 becomes a serial number based on the sequence number of the IP packet PA, PB received from the number update unit 30. Select the transmission IP packet PS from the PB.

More specifically, when the sequence number of the IP packet PA is not a serial number, the supplementary selection unit 40 selects the IP packet PB as the transmission IP packet PS, while the sequence number of the IP packet PB is not a serial number. In this case, IP packet PA is selected as the transmission IP packet PS.

FIG. 10 is a diagram showing an example of output processing by the replenishment selection unit of the transmission line integration device according to the embodiment of the present disclosure.

With reference to FIG. 10, when the sequence number of the IP packet PA11 is a serial number and the sequence number of the IP packet PB11 is a serial number, the replenishment selection unit 40 gives priority to the IP packet PB11 as the transmission IP packet PS. Select.

More specifically, in the replenishment selection unit 40, the transmission IP packet (not shown) output to the transmission unit 50 immediately before by the sequence number “0x0053” of the IP packet PA11 and the sequence number “0x0053” of the IP packet PB11. When the number is obtained by incrementing the sequence number of PS, the IP packet PB11 is preferentially selected as the transmission IP packet PS.

Then, the supplementary selection unit 40 outputs the IP packet PB11 selected as the transmission IP packet PS to the transmission unit 50.

Next, the replenishment selection unit 40 is the sequence number of the transmission IP packet PS that the sequence number “0x0054” of the IP packet PA12 and the sequence number “0x0054” of the IP packet PB12 output to the transmission unit 50 immediately before. When the number is an increment of "0x0053", the IP packet PB12 is preferentially selected as the transmission IP packet PS.

Then, the supplementary selection unit 40 outputs the IP packet PB12 selected as the transmission IP packet PS to the transmission unit 50.

Next, in the replenishment selection unit 40, the sequence number “0x0055” of the IP packet PA13 is a number obtained by incrementing the sequence number “0x0054” of the transmission IP packet PS output to the transmission unit 50 immediately before. If the sequence number "0x0000" of the IP packet PB13 is not a number obtained by incrementing the sequence number "0x0054" of the transmission IP packet PS output to the transmission unit 50 immediately before, the IP is used as the transmission IP packet PS. Select packet PA13.

Then, the supplementary selection unit 40 outputs the IP packet PA13 selected as the transmission IP packet PS to the transmission unit 50.

[Sender]
The transmission unit 50 transmits the stream received from the replenishment selection unit 40 in a predetermined format. For example, the transmission unit 50 transmits the stream in the form of an IP packet or a frame addressed to the cable television network 452.

More specifically, the transmission unit 50 receives the transmission IP packet PS from the supplementary selection unit 40 and transmits the received transmission IP packet PS to the router 222.

Further, the transmission unit 50 generates a frame based on the transmission IP packet PS received from the supplementary selection unit 40, modulates the generated frame, and sets the frequency of the modulated frame to, for example, a frequency corresponding to the cable television network 452. The generated distribution wave is generated, and the generated distribution wave is transmitted to each subscriber's house 153 via, for example, a cable television network 452.

[Operation flow]
Each device in the broadcasting system according to the embodiment of the present disclosure includes a computer including a memory, and an arithmetic processing unit such as a CPU in the computer includes a program including a part or all of each step of the following flowchart and sequence. Read from the memory and execute. The programs of these plurality of devices can be installed from the outside. The programs of these plurality of devices are distributed in a state of being stored in a recording medium.

FIG. 11 is a flowchart defining an example of an operation procedure when the transmission line integrating device according to the embodiment of the present disclosure transmits a stream.

With reference to FIG. 11, first, the transmission line integration device 101 listens for the IP packet P that has passed through the IPTV transmission network 451 (NO in step S102), and when it receives the IP packet P (YES in step S102), the received IP. Packet P is stored in FIFA 60. More specifically, the transmission line integration device 101 receives the IP packet PA that has passed through the IPTV transmission network 451A, and stores the received IP packet PA in the FIFA 60A. Further, the transmission line integrating device 101 receives the IP packet PB that has passed through the IPTV transmission network 451B, and stores the received IP packet PB in the FIFA 60B (step S104).

Next, the transmission line integrating device 101 collates the IP packets PA and PB stored in the FIFO 60A and 60B, respectively. More specifically, the transmission line integrating device 101 collates the payloads of the IP packet PAs and PBs, and confirms the sequence numbers included in the IP packets PAs and PBs (step S106).

Next, the transmission line integration device 101 performs an update process for updating the sequence number of the IP packet P by adding or subtracting the sequence number included in the IP packet P based on the collation result. More specifically, the transmission line integration device 101 assigns a new sequence number to at least one of the IP packet PA and PB to match the sequence numbers of the IP packet PA and PB having the same payload (step S108). ..

Next, when the transmission path integration device 101 determines that the IP packet PB is defective based on the confirmation result of the continuity of the sequence number of the IP packet PB (YES in step S110), the transmission path integration device 101 and the IP packet PB A stream is constructed by supplementing with IP packet PAs containing the same payload. More specifically, the transmission line integration device 101 selects the IP packet PA as the transmission IP packet PS (step S112).

On the other hand, when the IP packet PB is not defective (NO in step S110), the transmission line integrating device 101 constitutes a stream by the IP packet PB. More specifically, the transmission line integration device 101 selects the IP packet PB as the transmission IP packet PS (step S114).

Next, the transmission line integration device 101 transmits the configured stream in a predetermined format. More specifically, for example, the transmission line integration device 101 transmits the transmission IP packet PS to the router 222. Further, for example, the transmission line integrating device 101 generates a frame based on the transmission IP packet PS, modulates the generated frame, and converts the frequency of the modulated frame into a frequency corresponding to, for example, a cable television network 452. The generated distribution wave is generated, and the generated distribution wave is transmitted to each subscriber's house 153 via, for example, a cable television network 452 (step S116).

Next, the transmission line integration device 101 waits for a new IP packet P from the IPTV transmission network 451 (NO in step S102).

FIG. 12 is a diagram showing an example of a processing sequence in the broadcasting system according to the embodiment of the present disclosure.

With reference to FIG. 12, first, the IP retransmission device 201A receives the broadcast wave and generates an IP packet PA constituting a stream included in the received broadcast wave according to a predetermined rule (step S202).

Further, the IP retransmission device 201B receives the same broadcast wave as the broadcast wave received by the IP retransmission device 201A, and generates an IP packet PB constituting a stream included in the received broadcast wave according to the predetermined rule (step). S204).

Next, the IP retransmission device 201A transmits the generated IP packet PA via a predetermined transmission path (step S206).

Further, the IP retransmission device 201B transmits the generated IP packet PB via a predetermined transmission path different from that of the IP retransmission device 201A (step S208).

Next, the transmission line integration device 101 receives IP packets PA and PB transmitted from the IP retransmission devices 201A and 201B and has passed through different transmission paths, and stores the received IP packets PA and PB in the FIFO 60A and 60B, respectively. (Step S210).

Next, the transmission line integrating device 101 collates the IP packets PA and PB stored in the FIFO 60A and 60B with each other (step S212).

Next, based on the collation result, the transmission line integration device 101 composes a stream by supplementing with the other of the IP packets PA and PB when one of the IP packets PA and PB is defective (step S214).

Next, the transmission line integration device 101 transmits the configured stream in a predetermined format (step S216).

In the transmission line integrating device 101 according to the embodiment of the present disclosure, the number updating unit 30 adds or subtracts the sequence number included in the IP packet P based on the difference information received from the collating unit 20 to obtain the IP. The configuration is such that the sequence numbers of the IP packets PA and PB having the same payload are matched by updating the sequence number of the packet P, but the present invention is not limited to this. The number updating unit 30 is configured to match the sequence numbers of the IP packets PA and PB by updating the sequence numbers of either or both of the IP packets PA and PB having the same payload with predetermined serial numbers. You may.

Further, in the transmission line integrating device 101 according to the embodiment of the present disclosure, the collation unit 20 is configured to collate the payloads of the IP packet PAs and PBs and confirm the sequence numbers included in the IP packets PAs and PBs. Yes, but it is not limited to this. The collation unit 20 may have a configuration in which the payloads of the IP packets PA and PB are collated, but the sequence numbers included in the IP packets PA and PB are not confirmed. In this case, the number updating unit 30 assigns a predetermined serial number to the IP packets PA and PB having the same payload, as described above, based on the collation result by the collation unit 20, for example.

Further, in the transmission line integrating device 101 according to the embodiment of the present disclosure, if the IP packet P is not accumulated in the FIFO 60 for a predetermined period in the state where the confirmation process is being performed, the collation unit 20 performs the detection process again. The configuration is such that the serial number confirmation process is performed using each sequence number of the IP packet PA and PB that matches the detected payload in the detection process as the initial value, but the present invention is not limited to this. The collation unit 20 may be configured not to perform detection processing even when one of the IP packets PA and PB is not accumulated in the FIFA 60 for a predetermined period. In this case, the supplementary selection unit 40 selects, for example, only the other of the IP packets PA and PB as the transmission IP packet PS and outputs the output to the transmission unit 50.

Further, in the transmission line integrating device 101 according to the embodiment of the present disclosure, when the sequence number of the IP packet PA and the sequence number of the IP packet PB are consecutive numbers, the supplementary selection unit 40 IPs as the transmission IP packet PS. Although the configuration is such that the packet PB is preferentially selected, the present invention is not limited to this. When the sequence number of the IP packet PA and the sequence number of the IP packet PB are consecutive numbers, the replenishment selection unit 40 dynamically selects either the IP packet PA or the PB as the transmission IP packet PS according to some condition. It may be configured.

Further, in the transmission line integration device 101 according to the embodiment of the present disclosure, the replenishment selection unit 40 is in the IP packet PA, PB based on the sequence number of the IP packet PA, PB received from the number update unit 30. However, the configuration is such that the transmission IP packet PS is selected from the above and the selected transmission IP packet PS is output to the transmission unit 50, but the present invention is not limited to this. The replenishment selection unit 40 selects one of the payload of the IP packet PA and the payload of the IP packet PB based on the sequence number of the IP packet PA and PB received from the number update unit 30, and selects the selected payload. It may be configured to output to the transmission unit 50 in a packet format other than the IP packet P.

By the way, in a broadcast retransmission system that receives broadcast waves containing program information and retransmits them to other devices, there is a technology that can realize stable information transmission while improving the resistance to the broadcast wave reception environment. desired.

On the other hand, in the transmission line integrating device 101 according to the embodiment of the present disclosure, in the receiving unit 10, the streams included in the same broadcast wave received by the external antennas 81A and 81B at different points are packets according to the same rule. The IP packets PA and PB are converted, and the IP packets PA and PB that have passed through different transmission paths are received. The collating unit 20 collates the IP packets PA and PB received by the receiving unit 10 with each other. Based on the collation result of the collation unit 20, the replenishment selection unit 40 outputs a stream by supplementing with the IP packet PA and PB passing through another transmission path when there is a defect in the IP packet PA and PB passing through the transmission path. .. The transmission unit 50 transmits the stream received from the replenishment selection unit 40 in a predetermined format.

Further, in the broadcasting system 302 according to the embodiment of the present disclosure, the IP retransmission devices 201A and 201B are provided at different points, receive the same broadcast wave, and form a stream included in the received broadcast wave. Packets PA and PB are generated according to the same rule, and the generated IP packets PA and PB are transmitted. The transmission path integration device 101 receives IP packets PA and PB transmitted from the IP retransmission devices 201A and 201B and has passed through different transmission paths, collates the received IP packets PA and PB with each other, and is based on the collation result. When there is a defect in the IP packet PA or PB that has passed through the transmission path, the stream is supplemented by the IP packet PA or PB that has passed through another transmission path to form a stream, and the configured stream is transmitted in a predetermined format.

Further, in the transmission line integration method according to the embodiment of the present disclosure, first, the transmission line integration device 101 packets the streams included in the same broadcast wave received by the external antennas 81A and 81B at different points according to the same rule. The IP packets PA and PB are converted, and the IP packets PA and PB that have passed through different transmission paths are received. Next, the transmission line integration device 101 collates the received IP packets, IP packets PA, and PB with each other. Next, when the transmission path integration device 101 has a defect in the IP packet PA or PB that has passed through the transmission path based on the collation result, the transmission path integration device 101 supplements the IP packet PA or PB that has passed through another transmission path to form a stream. .. Next, the transmission line integration device 101 transmits the configured stream in a predetermined format.

In this way, a redundant configuration for the broadcast wave reception environment is provided by a configuration and method in which IP packets PAs and PBs that have passed through different transmission paths based on the same broadcast wave received at different points are collated and transmitted in a complementary manner. At the same time, by using the IP packets PA and PB from each transmission path packetized according to the same rule, for example, it is possible to contribute to the prevention of the loss of the stream for transmission.

Therefore, in the transmission line integration device 101, the broadcasting system, and the transmission line integration method according to the embodiment of the present disclosure, broadcasting is performed in a broadcasting retransmission system that receives a broadcasting wave containing program information and retransmits it to another device. Stable information transmission can be realized while improving the resistance to the wave reception environment.

It should be considered that the above embodiments are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

The above description includes the features described below.
[Appendix 1]
A receiver in which streams included in the same broadcast wave received by antennas at different points are packetized IP packets according to the same rules, and receive a plurality of the IP packets that have passed through different transmission paths.
A collating unit that collates each of the IP packets received by the receiving unit, and a collating unit.
Based on the collation result of the collation unit, when the IP packet that has passed through the transmission path has a defect, the supplementary selection unit that supplements with the IP packet that has passed through the other transmission path and outputs the stream.
A transmission unit that transmits the stream received from the replenishment selection unit in a predetermined format, and a transmission unit.
A number update unit for updating the sequence number of the IP packet by adding or subtracting the sequence number included in the IP packet is provided.
The collation unit collates the payload of the IP packet to associate the IP packet via each transmission path, and compares the sequence numbers included in the corresponding IP packet in each transmission path. , And by confirming the sequence number included in the IP packet, the continuity of the IP packet is confirmed.
The number update unit is a transmission line integration device that updates the sequence number of the IP packet based on the comparison result of the collation unit.

[Appendix 2]
A plurality of IP retransmission devices provided at different points, receive the same broadcast wave, generate an IP packet constituting a stream included in the received broadcast wave according to the same rule, and transmit the generated IP packet. ,
Each of the IP packets transmitted from the plurality of IP retransmission devices and passing through different transmission paths is received, the received IP packets are collated with each other, and the IP via the transmission path is based on the collation result. When the packet is defective, the stream is configured by supplementing with the IP packet that has passed through the other transmission path, and the configured stream is provided with a transmission path integration device that transmits the configured stream in a predetermined format.
The transmission path integrating device associates the IP packets in each transmission path by collating the payload of the IP packets, and compares the sequence numbers included in the corresponding IP packets in each transmission path. By performing this and confirming the sequence number included in the IP packet, the continuity of the IP packet is confirmed.
The transmission line integration device is a broadcasting system that updates the sequence number of the IP packet by adding or subtracting the sequence number included in the IP packet based on the comparison result of the sequence number.

11 Receiver 11A, 11B IP receiver 20 Matching unit 30 Number update unit 31A, 31B Addition / subtraction unit 40 Replenishment selection unit 50 Transmitter unit 60A, 60B FIFO
81, 81A, 81B External antenna 101 Transmission line integration device 121, 121A, 121B, 122, 222 Router 123 ONU
131,132 STB
133 TV Monitor 152, 152A, 152B, 152C, 153 Subscriber Home 201, 201A, 201B IP Retransmitter 202 Program Distribution Device 203 IP Broadcast Receiver 204 Cable TV Broadcast Receiver 251,251A, 251B IPTV Center 252 Transmission Center 301 Broadcast retransmission system 302 Broadcast system 451, 451A, 451B, 453 IPTV transmission network 452 Cable television network

Claims (7)

A receiver in which streams included in the same broadcast wave received by antennas at different points are packetized IP packets according to the same rules, and receive a plurality of the IP packets that have passed through different transmission paths.
A collating unit that collates each of the IP packets received by the receiving unit, and a collating unit.
Based on the collation result of the collation unit, when the IP packet that has passed through the transmission path has a defect, the supplementary selection unit that supplements with the IP packet that has passed through the other transmission path and outputs the stream.
A transmission line integrating device including a transmission unit that transmits the stream received from the replenishment selection unit in a predetermined format. The transmission line integration device according to claim 1, wherein the collation unit collates the payloads of the IP packets that have passed through the transmission paths and confirms the sequence number included in the IP packets. The collating unit resets the confirmation state of the sequence number when the arrival of the IP packet via the transmission path is interrupted, and starts the confirmation of the sequence number from the initial state when the arrival is resumed. Item 2. The transmission line integration device according to item 2. The transmission line integration device further
The transmission line integration device according to any one of claims 1 to 3, further comprising a number updating unit that updates the sequence number of the IP packet by adding or subtracting the sequence number included in the IP packet. The supplementary selection unit can perform at least one of an operation of preferentially selecting the IP packet that has passed through any one of the transmission paths and an operation of dynamically selecting the transmission path. The transmission line integration device according to any one of claims 1 to 4. A plurality of IP retransmission devices provided at different points, receive the same broadcast wave, generate an IP packet constituting a stream included in the received broadcast wave according to the same rule, and transmit the generated IP packet. ,
Each of the IP packets transmitted from the plurality of IP retransmission devices and passing through different transmission paths is received, the received IP packets are collated with each other, and the IP via the transmission path is based on the collation result. A broadcasting system including a transmission path integration device that, when a packet is defective, supplements with the IP packet that has passed through the other transmission path to form the stream, and transmits the configured stream in a predetermined format. A step of receiving a plurality of said IP packets in which streams contained in the same broadcast wave received by antennas at different points are packetized according to the same rule and have passed through different transmission paths.
The step of collating each received IP packet with each other,
Based on the collation result, when the IP packet that has passed through the transmission path has a defect, the step of forming the stream by supplementing with the IP packet that has passed through the other transmission path, and
A transmission line integration method including a step of transmitting the configured stream in a predetermined format.

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