Satellite information source networking device between wireless stations

Abstract

The utility model discloses a satellite information source networking device between wireless stations, which is provided with a central node, a central satellite receiving antenna, a central satellite receiving tuner and a central satellite receiver are arranged on the central node to acquire central program satellite signals, and at least one station transmits self-station satellite signals back to serve as a standby satellite information source of the central node. As long as the satellite signals of the center node and the station do not fail at the same time, all stations linked with the center node can obtain the standby satellite information source, the center node is independent of all the stations and is located in different operation environments and natural environments from the stations back transmitting the satellite information source, the probability of failing at the same time is very low, and the reliability of the system is greatly improved. Therefore, a stable satellite information source can be provided for each station; the purpose of providing the standby satellite information source for each stage of station can be achieved only by installing the satellite signal receiving system at the central node and performing related configuration on the corresponding ports of the central node and each stage of node, and the cost is very low compared with the cost of additionally arranging satellite receiving systems at all stages of stations.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of radio and television wireless coverage technology, and particularly relates to a satellite signal source networking device between wireless stations. BACKGROUND

[0002] The overall scheme of the central radio and television program wireless digital coverage project adopts a technical scheme based on satellite transmission terrestrial digital television single frequency network, which has been fully popularized and used. Since the satellite signal code stream is not completely consistent with the national trunk network signal, mutual backup of the signal source cannot be realized, and once the satellite receiving high frequency head or satellite receiver in the station is damaged by lightning, the satellite signal source will be inevitably interrupted, at which time the central terrestrial digital television will have no signal source available, and further cause the central terrestrial digital television to stop broadcasting. Therefore, it is necessary to provide a backup satellite signal source for the stations using the single frequency network technology.

[0003] The prior art provides the following methods for providing a backup satellite signal source:

[0004] 1. A main and backup satellite receiving system is added to the station to ensure that the transmitter has two satellite signal sources, but the newly added satellite receiving system is completely the same as the original satellite receiving system in terms of the operating environment and the natural environment, and the probability of simultaneous failure is still high, and the satellite signal source backup cannot be stably realized.

[0005] 2. The same set of satellite signals of a program is received by using a backup star with the same frequency as the main star frequency to realize multi-satellite reception, and a satellite receiving system is added to each station on the basis of the existing satellite receiving system, but the process of putting the backup star into use is long, and a large number of stations are additionally equipped with a complete set of satellite receiving systems, which is expensive.

[0006] 3. A satellite receiving system is added to each station on the basis of the existing satellite receiving system, and a "fire beacon station" type transmission channel is set up, so that when the main satellite receiving system fails, the station can receive the satellite signals of the adjacent station, and the program stream is extracted by using a demultiplexing device, a complete set of satellite receiving systems are additionally equipped for a large number of stations, which is expensive, and the newly added satellite receiving system and the original satellite receiving system are in the same or adjacent geographical positions, and have similar operating environment and natural environment, so there is still a high probability of simultaneous failure, and the reliability and stability need to be improved.

[0007] In summary, it is necessary to provide a satellite signal source networking device between wireless stations, which can provide stable satellite signal sources for each station at a low cost. UTILITY MODEL CONTENTS

[0008] The utility model provides a satellite signal source networking device between wireless stations, which provides hardware support for solving the problem that the prior art cannot provide stable satellite signal sources for each station at a low cost.

[0009] The utility model discloses a following technical scheme solves technical problems:

[0010] Wireless station between satellite signal source networking device, including 1 center node, 0 above secondary station node, 0 above tertiary station node and 1 above quaternary station node, the center node includes center satellite receiving antenna, center satellite receiving high frequency head and center satellite receiver, the center satellite receiving antenna will receive the initial satellite signal input to the center satellite receiving high frequency head and be amplified and frequency conversion, then by center satellite receiver descrambling, obtain center program satellite signal, the center program satellite signal is input to external center IP multiplexer through external center switch, the system structure of each secondary station node is same, in each secondary station node, the external center IP multiplexer wire transmission center program satellite signal to external secondary station switch, the system structure of each tertiary station node is same, in each tertiary station node, the external center IP multiplexer wire transmission center program satellite signal to external tertiary station switch, the system structure of each quaternary station node is same, in each quaternary station node, the external center IP multiplexer wire transmission center program satellite signal to external quaternary station switch through external ring network, in each station node, at least 1 station node wire counter-transmission station program satellite signal to the external center IP multiplexer.

[0011] Further, at least one secondary station node of external secondary station IP multiplexer wire counter-transmission station program satellite signal to the external center IP multiplexer.

[0012] Further, at least one tertiary station node of external tertiary station IP multiplexer wire counter-transmission station program satellite signal to the external center IP multiplexer.

[0013] Further, at least one quaternary station node of external quaternary station IP multiplexer wire counter-transmission station program satellite signal to the external center IP multiplexer.

[0014] Further, the center satellite receiving high frequency head is dual polarization dual local oscillator high frequency head.

[0015] Further, in the center node, still include sending end wireless network bridge, in each secondary station node, still include secondary station receiving end wireless network bridge, the sending end wireless network bridge wire transmission center program satellite signal to each secondary station receiving end wireless network bridge, in each secondary station node, the secondary station receiving end wireless network bridge wire transmission center program satellite signal to external secondary station switch.

[0016] Further, in each secondary station node, a secondary station IP decoder is further included; in each secondary station node, the secondary station receiving end wireless network bridge inputs the received central program satellite signal to the external secondary station switch via the secondary station IP decoder.

[0017] Further, in each tertiary station node, a tertiary station receiving end wireless network bridge is further included; the sending end wireless network bridge wirelessly transmits the central program satellite signal to each tertiary station receiving end wireless network bridge; in each tertiary station node, the tertiary station receiving end wireless network bridge inputs the received central program satellite signal to the external tertiary station switch.

[0018] Further, in each tertiary station node, a tertiary station IP decoder is further included; in each tertiary station node, the tertiary station receiving end wireless network bridge inputs the received central program satellite signal to the external tertiary station switch via the tertiary station IP decoder.

[0019] Further, the medium used by each wired transmission mode is an optical fiber.

[0020] Compared with the prior art, the following features are provided:

[0021] 1. A central node is arranged outside the secondary, tertiary and quaternary stations, and a central satellite receiving antenna, a central satellite receiving high-frequency head and a central satellite receiver are installed in the central node to obtain a central program satellite signal. The central node is independent of the stations, and the operating environment and natural environment thereof are different from those of the satellite receiving device of the station. When a device fault or lightning strike occurs in the station to cause interruption of the satellite signal, the possibility of interruption of the satellite signal of the central node is small, and the central node can continue to provide stable satellite sources for the stations to realize off-site backup of the satellite sources of the stations.

[0022] Each station node has at least one satellite signal transmitted back to the central node from the station as a backup of the satellite source of the central node. The central node is the upper node, and the stations are the lower nodes. The upper node provides stable and reliable satellite signals for the lower nodes to realize cross-level backup. The lower nodes provide at least one satellite signal to realize cross-level backup when the upper node fails. The bidirectional vertical redundancy design realizes sharing of the satellite signals. As long as either the satellite signal from the station or the satellite receiving signal of the central node is normal, all the stations connected with the central node can obtain normal backup satellite sources. This redundant path independent of the original satellite link can obtain satellite sources from the station and use the satellite source of one station as a backup, so that the reliability and stability are guaranteed, and the smooth development of the broadcast work is greatly ensured.

[0023] There is no need to add a satellite signal receiving system to all stations. Only by installing a satellite signal receiving system at the central node and completing some configurations, the satellite signal source of the stations can be backed up in different locations, which greatly reduces equipment costs.

[0024] Maintaining the satellite receiving system of the central node can ensure the maintenance of backup satellite sources for all stations connected to it. By focusing on key points, satellite receiving systems at all levels can achieve minimal or no maintenance, greatly saving maintenance costs.

[0025] 2. This utility model is added to the existing station system without making any modifications to the links or configurations of the existing station system. The performance and functions of the two satellite signal source links do not interfere with each other, and the secure broadcasting capability is further improved on the original basis.

[0026] 3. Set up a transmitting wireless bridge at the central node and a receiving wireless bridge at the secondary and tertiary stations to establish a wireless communication link. In the event of a failure in wired transmission, activate the wireless transmission link to ensure the smooth transmission of satellite signals and further ensure the stability of the backup satellite signal source.

[0027] 4. Install IP decoders at level 2 and level 3 stations to isolate the wireless bridge at the receiving end from the original system of the station, thus ensuring the network security of the original system of the station.

[0028] 5. At the central node, a dual-polarization dual-local oscillator LNB is used to descramble the signals required by each station using only one LNB and one satellite receiving antenna. Attached Figure Description

[0029] Figure 1 This is a structural principle block diagram of the connection between this utility model and the original system of the station.

[0030] Figure 2 This is a block diagram illustrating the structural principle of the television system within the station.

[0031] Figure 3 This is a topology diagram of the broadcasting network company and the stations of broadcasting and television stations at all levels within its service area. Detailed Implementation

[0032] The present invention will be further described below with reference to the embodiments, but the present invention is not limited to these embodiments.

[0033] In the field of wireless digital coverage for central radio and television programs, the structural principle block diagram of the television system within a station is as follows: Figure 2The satellite receiving antenna reflects the satellite signal to the feed located at the focal point, the satellite receiving high frequency head amplifies and frequency converts the signal output by the feed, and then the satellite receiver demodulates and processes the signal to output the audio and video signal at a specified frequency point, and then the interface adaptation and IP are completed in the switch, and then the integration, protocol packaging and optimization are completed in the IP multiplexer, and then the digital transmission stream in the specified format is output, and then the digital transmission stream is modulated in the transmitter, the high frequency oscillation signal generated is converted into electromagnetic wave energy by the antenna feeder device, and the electromagnetic wave is radiated as much as possible, and then the wireless coverage of the service area is realized.

[0034] As shown in the topological structure diagram, the satellite signal source networking device of the wireless station is connected with the original system of the station. Figure 3

[0035] The satellite signal source networking device of the wireless station provided by the utility model, including 1 center node, 0 above secondary station node, 0 above tertiary station node and 1 above quaternary station node, the center node includes center satellite receiving antenna, center satellite receiving high frequency head and center satellite receiver, the center satellite receiving antenna inputs the initial satellite signal received to the center satellite receiving high frequency head to amplify and frequency conversion, and then the center satellite receiver is demodulated to obtain the center program satellite signal, the center program satellite signal is input to the external center IP multiplexer through the external center switch, the system structure of each secondary station node is same, in each secondary station node, the external center IP multiplexer wire-transmits the center program satellite signal to the external secondary station switch, the system structure of each tertiary station node is same, in each tertiary station node, the external center IP multiplexer wire-transmits the center program satellite signal to the external tertiary station switch, the system structure of each quaternary station node is same, in each quaternary station node, the external center IP multiplexer wire-transmits the center program satellite signal to the external quaternary station switch through the external ring network, in each station node, at least one station node wire-transmits the self-station program satellite signal to the external center IP multiplexer. Figure 1

[0036] ​​With the county as a unit, the county radio and television network company (referred to as the county front end) is usually located in the urban area, has the characteristics of low terrain, no high tree lightning, and perfect lightning protection facilities, and the county radio and television network company provides optical fiber signals for stations at all levels in its service area, and a single optical fiber integrates multiple cores, so unused optical fiber cores can be used to establish a transmission link. Therefore, the center node is preferably arranged at the county front end that provides optical fiber signals for stations at all levels, satellite signals are acquired at the county front end, and are transmitted to stations at all levels by wire. The medium used by the wire transmission method mentioned in the utility model is optical fiber.

[0037] A center satellite receiving antenna, a center satellite receiving high-frequency head, and a center satellite receiver are installed at the county front end. The center satellite receiving antenna reflects satellite signals to a feed located at a focal point. The center satellite receiving high-frequency head amplifies and converts the signal output from the feed. The center satellite receiver performs descrambling processing on the signal, and outputs audio and video signals at a specified frequency point. The audio and video signals are input to a county front end center switch for adaptation, and are integrated, protocol-encapsulated, and optimized by a county front end center IP multiplexer. The signals are then transmitted to stations at all levels by optical fiber.

[0038] Further, the center satellite receiving high-frequency head is a dual-polarization dual-oscillator high-frequency head that can simultaneously receive horizontal polarization signals and vertical polarization signals. The dual-oscillator can cover a wider frequency range and can also avoid signal overlap interference. The use of a dual-polarization dual-oscillator high-frequency head in the center satellite receiving high-frequency head can provide the required stable broadcast television signals in the region.

[0039] Further, the center satellite receiver can be one, two, or even more. The center satellite receiver is set with the downlink frequency, polarization mode, and symbol rate corresponding to the program, so that the corresponding audio and video signal streams can be descrambled. For example, Zhongxing 6D: 8 sets of central number programs and 12 sets of central broadcast (including China Radio International), with the parameters of downlink frequency 4131, vertical polarization, and symbol rate 14800; 4 sets of central number programs, with the parameters of downlink frequency 4145, vertical polarization, and symbol rate 8330; Guangxi series broadcast and Guangxi Satellite Television, with the parameters of downlink frequency 3884, horizontal polarization, and symbol rate 5720. Two satellite receivers can be set. The central program parameters are input to the modulator-1 and modulator-2 of one of the satellite receivers, and the Guangxi program parameters are input to the modulator-1 of the other satellite receiver, so that 12 sets of central number programs, 12 sets of central broadcast (including China Radio International), Guangxi series broadcast, and Guangxi Satellite Television can be descrambled. The specific configuration parameters of the satellite receiver are determined according to the broadcast television programs of stations at all levels.

[0040] For FM broadcast programs, damage to the LNB or satellite receiver at the station caused by lightning strikes can also result in satellite signal loss, triggering a single-signal alarm. Therefore, it is necessary to provide a backup satellite source for FM broadcast programs. After configuring the parameters at the central satellite receiver based on the broadcast program's specifications, the corresponding broadcast program signal can be descrambled. The broadcast signal is then transmitted to the station via fiber optic cable, where it undergoes multiplexing and demodulation by the station's existing equipment. Finally, it is selected by an audio switcher and input to the FM transmitter.

[0041] In the original system, the central IP multiplexer directly connects to the secondary station switches of each secondary station and the tertiary station switches of each tertiary station via optical fiber, providing broadcast television signals to the secondary and tertiary stations. Typically, a single optical fiber integrates multiple cores; therefore, by configuring the unused cores in the existing optical fiber, the central program satellite signal can be transmitted to each secondary and tertiary station node, providing a backup satellite signal source for each secondary and tertiary station transmitter. Similarly, the central IP multiplexer uses optical fiber to enter the ring network, and then the ring network transmits the central program satellite signal wired to the tertiary station switch. This can also be configured at the corresponding ports to provide a backup satellite signal source for each tertiary station transmitter.

[0042] In a specific embodiment of this utility model, satellite off-site backup is provided between one central node (county front-end), one third-level station node (county-level station), and one or more fourth-level station nodes (township stations):

[0043] (1) The county front-end uploads satellite signals to the county-level station.

[0044] Connect one of the TS output ports of the central satellite receiver to the central switch; configure demodulator RF1 with downlink frequency 4131, vertical polarization, and symbol rate 14800, and demodulator RF2 with downlink frequency 4145, vertical polarization, and symbol rate 8330; output the stream to network card 1; configure the IP source address as 12.173.2.68 / 8; configure two multicast transmission addresses, namely 238.173.2.68:4000 for CCTV-8 and 238.173.2.68:4010 for CCTV-4; on the central switch, assign the corresponding network ports to the same VLAN and configure multicast forced forwarding.

[0045] After completing the above configuration, the secondary station switch at the county-level station can receive the corresponding multicast, and the satellite signal from the central node can be transmitted normally to each tertiary station node, thus providing the tertiary station transmitter with a backup satellite signal source.

[0046] In addition, a satellite receiver can be added according to the demand for demodulating other broadcast television signals. For example, when the demodulator is configured with a downlink frequency of 3884, horizontal polarization, and a symbol rate of 5720, Guangxi Series Broadcast and Guangxi Satellite Television can be demodulated, and the demodulated programs can be sent to the county-level station through an optical fiber or a wireless network bridge. When the station self-satellite signal is abnormal, the transmitter of Guangxi Series Broadcast and Guangxi Satellite Television will trigger a single signal alarm. At this time, the satellite source provided by the county front end is automatically switched to, and the single signal alarm is eliminated.

[0047] (2) County front end sends satellite signals to each township station

[0048] The original topology structure of the county front end and the township station does not need to be changed. At the county front end, the corresponding card port of the central IP multiplexer connected to the township station by optical fiber link is configured, two multicast addresses are added in the sending option tab, i.e., 238.173.2.68:4000 for the Central Eight Television Programs and 238.173.2.68:4010 for the Central Four Television Programs, and the gigabit network card, transparent mode, and corresponding received satellite signal are selected on the central IP multiplexer output card. At the township station, the three-level station IP multiplexer receives the multicast stream and transmits it to the ASI port of the three-level station transmitter.

[0049] After the above configuration is completed, the central terrestrial digital television of the township station can continue to broadcast using the satellite signal transmitted by the optical fiber when the self-satellite signal is lost.

[0050] (3) County-level station satellite signal is transmitted to the county front end

[0051] At the county-level station, an idle card network port (such as card seven network port one) of the secondary station IP multiplexer is selected, an electrical module is inserted, and a six-strand twisted pair is connected to the service port of the backhaul switch. Another idle card network port (such as card seven network port three) of the secondary station IP multiplexer is selected, an LC-FC single-mode single-fiber SFP-GE-LX-SM1310-BIDI optical module is inserted, and an optical fiber is connected to an idle port (such as the third port) of the ODF disc. The backhaul switch is used for monitoring the backhaul and monitoring whether the received satellite signal is normal.

[0052] In the county station, the IP multiplexer board card seven network port one connection state is configured to forced gigabit full duplex mode, the receiving multicast address is set to central eight sets of television programs 224.224.224.20:2000, central four sets of television programs 224.224.224.21:2000; the program of the two multicast addresses is refreshed; the board card seven network port one and network port three are set to output backup mode; the network port one sends the option tab, two sending multicast addresses are added, i.e., central eight sets of television programs 238.173.2.58:4000 and central four sets of television programs 238.173.2.58:4010; the code rate is set to 19.258Mb / s and 10.396M / s, and the output switch is set to off. Since the output backup mode is set, the board card seven network port three automatically obtains the configuration of the board card seven network port one, and the network port three output switch is set to on; in the output tab, the gigabit network card is selected, and the two output ports are set to transparent mode, corresponding to the two multicast addresses received by the satellite receiver respectively;

[0053] In the county front end, a spare board card network port (such as board card seven network port two) is selected to insert SFP-GE-LX-SM1490-BIDI optical module, and is connected to ODF disc third port (consistent with the county station ODF spare port) through LC-FC single mode single fiber;

[0054] In the county front end, the board card seven network port two is set to forced gigabit full duplex mode, and two receiving multicast addresses are added, i.e., central eight sets of television programs 238.173.2.58:4000 and central four sets of television programs 238.173.2.58:4010,

[0055] After the above configuration is completed, the county station can transmit the satellite signal from the station to the county front end. The configuration method of the township station transmitting the satellite signal from the station to the county front end is the same.

[0056] (4) 2.3.2 wireless link transmission mode

[0057] Another TS output port (such as network port two) of the satellite receiver of the county front end is connected to the sending end wireless network bridge, and the program parameters and multicast addresses are configured in the network port two; the third wireless receiving network bridge of the county station is connected to the board card seven network card two of the third station IP multiplexer, and the same multicast addresses are configured. After the above configuration is completed, the county station can receive the satellite signal from the county front end through the wireless link.

[0058] It should be noted that the parameters, IP addresses, and multicast addresses involved in (1)-(4) above are provided by specific program information. The selection of ports and network ports can be based on actual usage and should be chosen according to the requirements and available ports. Attention should be paid to the corresponding relationship. It is not limited to the data mentioned in (1)-(4). When applied to descrambling other TV programs, the above configuration method and the topology provided by this utility model are also applicable.

[0059] This invention establishes a central node equipped with a satellite receiving system to receive satellite signals. A wired link is also established to the central node, providing backup satellite signals from at least one other station. This ensures the central node has both primary and backup satellite signals, which can provide satellite signal sources to any station with which it has a link. The central node shares the primary satellite signal source with other stations at all levels, and also shares the satellite signal sources from stations providing backhaul services. The probability of simultaneous failure of the central node's primary and backup satellite signal sources is low, thus ensuring the reliability and stability of the backup satellite signal sources for all stations. Furthermore, this solution only requires setting up a central node at a third location on top of the existing system, adding only one satellite receiving system and configuring it on the relevant ports, to achieve off-site backup of satellite signal sources for all stations, providing a stable satellite signal source for each station at low cost.

[0060] Furthermore, when more than one secondary station node is connected, at least one secondary station node's external secondary station IP multiplexer transmits its own secondary program satellite signal back to the external central IP multiplexer via wired transmission. When more than one tertiary station node is connected, at least one tertiary station node's external tertiary station IP multiplexer transmits its own tertiary program satellite signal back to the external central IP multiplexer via wired transmission. When more than one quaternary station node is connected, at least one quaternary station node's external quaternary station IP multiplexer transmits its own quaternary program satellite signal back to the external central IP multiplexer via wired transmission. In this way, the central node's backup satellite source includes satellite signals from secondary, tertiary, and quaternary stations. Due to the significant differences in operating and natural environments among secondary, tertiary, and quaternary stations, the probability of failure is also lower, further improving the reliability and stability of the backup satellite source for each level of station.

[0061] Further, in the center node, a transmitting wireless bridge is further included; in each secondary station node, a secondary station receiving wireless bridge is further included; the transmitting wireless bridge transmits the center program satellite signal to each secondary station receiving wireless bridge wirelessly; in each secondary station node, the secondary station receiving wireless bridge inputs the received center program satellite signal to an external secondary station switch via the secondary station IP decoder. The secondary station IP decoder realizes enhanced isolation to protect the original system of the secondary station from network attacks.

[0062] Further, in each secondary station node, a secondary station IP decoder is further included; in each secondary station node, the secondary station receiving wireless bridge inputs the received center program satellite signal to an external secondary station switch via the secondary station IP decoder. The secondary station IP decoder realizes enhanced isolation to protect the original system of the secondary station from network attacks.

[0063] Further, in each tertiary station node, a tertiary station receiving wireless bridge is further included; the transmitting wireless bridge transmits the center program satellite signal to each tertiary station receiving wireless bridge wirelessly; in each tertiary station node, the tertiary station receiving wireless bridge inputs the received center program satellite signal to an external tertiary station switch. A wireless transmission link of the satellite signal is established between the center node and each tertiary station node.

[0064] Further, in each tertiary station node, a tertiary station IP decoder is further included; in each tertiary station node, the tertiary station receiving wireless bridge inputs the received center program satellite signal to an external tertiary station switch via the tertiary station IP decoder. The tertiary station IP decoder realizes enhanced isolation to protect the original system of the tertiary station from network attacks.

[0065] The utility model discloses set up the center node, two -level station node, three -level station node and four -level station node, in the center node obtains the center program satellite signal, has carried out the configuration to relevant port, and with at least 1 station's counter -propagation satellite signal as the satellite signal source of backup, provides the satellite signal source of backup for the station of all center nodes establishing link. Establish node, install equipment, port configuration jointly function can only realize " low -cost for each station provides stable satellite signal source " truly, the utility model makes clear is to solve the problem of " can not low -cost for each station provides stable satellite signal source " of prior art existence and provides hardware support, correspondingly in the claim only protection hardware structure and link connection relation is applied for, the utility model discloses, it is to the shape, structure or its combination of product that is proposed to the new technical scheme of being suitable for practical, therefore the technical scheme provided by the claim belongs to the authorization object of utility model.

Claims

1. A satellite signal source networking device between wireless stations, characterized in that: it comprises one central node, 0 or more secondary station nodes, 0 or more tertiary station nodes, and 1 or more quaternary station nodes; the central node comprises a central satellite receiving antenna, a central satellite receiving high frequency head, and a central satellite receiver; the central satellite receiving antenna inputs the received initial satellite signal to the central satellite receiving high frequency head for amplification and frequency conversion, and then the central satellite receiver performs descrambling to obtain the central program satellite signal, which is input to an external central IP multiplexer through an external central switch; each secondary station node has the same system structure; in each secondary station node, the external central IP multiplexer wirelessly transmits the central program satellite signal to an external secondary station switch; each tertiary station node has the same system structure; in each tertiary station node, the external central IP multiplexer wirelessly transmits the central program satellite signal to an external tertiary station switch; each quaternary station node has the same system structure; in each quaternary station node, the external central IP multiplexer wirelessly transmits the central program satellite signal to an external quaternary station switch through an external ring network; in each station node, at least one station node wirelessly transmits the self-station program satellite signal back to the external central IP multiplexer.

2. The satellite signal source networking device between wireless stations according to claim 1, characterized in that: at least one secondary station node has an external secondary station IP multiplexer that wirelessly transmits the secondary station program satellite signal back to the external central IP multiplexer.

3. The satellite signal source networking device between wireless stations according to claim 1, characterized in that: at least one tertiary station node has an external tertiary station IP multiplexer that wirelessly transmits the tertiary station program satellite signal back to the external central IP multiplexer.

4. The satellite signal source networking device between wireless stations according to claim 1, characterized in that: at least one quaternary station node has an external quaternary station IP multiplexer that wirelessly transmits the quaternary station program satellite signal back to the external central IP multiplexer. The central satellite receiving high frequency head is a dual-polarized dual-LO high frequency head.

6. The satellite signal source networking device between wireless stations according to claim 1, characterized in that: the central node further comprises a transmitting end wireless network bridge; each secondary station node further comprises a secondary station receiving end wireless network bridge; the transmitting end wireless network bridge wirelessly transmits the central program satellite signal to each secondary station receiving end wireless network bridge; in each secondary station node, the secondary station receiving end wireless network bridge inputs the received central program satellite signal to an external secondary station switch.

7. The satellite signal source networking device between wireless stations according to claim 6, characterized in that: each secondary station node further comprises a secondary station IP decoder. ​ ​ ​ ​ ​ ​ ​ 5. The apparatus of claim 1 wherein: the plurality of wireless stations are grouped into a plurality of clusters; and the plurality of clusters are grouped into a plurality of groups. ​ ​ ​ ​ ​ ​ ​ ​ In each secondary station node, the secondary station receiving end wireless network bridge inputs the received central program satellite signal to the external secondary station switch via the secondary station IP decoder.

8. The wireless inter-station satellite source networking device according to claim 6, characterized in that: In each tertiary station node, further comprising a tertiary station receiving end wireless network bridge; The transmitting end wireless network bridge wirelessly transmits the central program satellite signal to each tertiary station receiving end wireless network bridge; In each tertiary station node, the tertiary station receiving end wireless network bridge inputs the received central program satellite signal to the external tertiary station switch.

9. The wireless inter-station satellite source networking device according to claim 8, characterized in that: In each tertiary station node, further comprising a tertiary station IP decoder; In each tertiary station node, the tertiary station receiving end wireless network bridge inputs the received central program satellite signal to the external tertiary station switch via the tertiary station IP decoder.

10. The apparatus of claim 1 wherein: Each wired transmission mode uses optical fiber as the medium. ​

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