CN203563145U - WOC network and cable television transmission system - Google Patents
WOC network and cable television transmission system Download PDFInfo
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- CN203563145U CN203563145U CN201320758144.4U CN201320758144U CN203563145U CN 203563145 U CN203563145 U CN 203563145U CN 201320758144 U CN201320758144 U CN 201320758144U CN 203563145 U CN203563145 U CN 203563145U
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Abstract
The utility model discloses a WOC network and a cable television transmission system. The WOC network comprises a WiFi signal generating device, a cable television signal generating device and a WOC terminal, and also comprises a combiner and a plurality of stages of successively connected distributors, wherein signal input terminals of the combiner are respectively connected with the WiFi signal generating device and the cable television signal generating device, a signal input terminal of the first stage distributor is connected with a signal output terminal of the combiner, and a signal output terminal of the last stage distributor is connected with an input terminal of the WOC terminal. The WOC network architecture is optimized in a manner of adding distributors in the network, insertion loss of a WiFi signal is increased by utilization of the distributors, and therefore interference of the WiFi signal on a cable television signal is reduced.
Description
Technical field
The utility model relates to the network architecture based on Cable TV Signal Transmission, specifically, relates to WOC network and adopts the CATV transmission system of this network.
Background technology
WOC(WiFi Over Coaxial) refer to by existing CATV cable TV coaxial cable and realize a kind of network that in room, high-quality WiFi signal covers.Existing WOC network using framework as shown in Figure 1, at broadcasting and TV end, WiFi signal generation device 11 is connected with two inputs of signal mixer 13 respectively with cable TV signal generation device 12, the synthetic road mixed signal of cable TV signal of utilizing WiFi signal that signal mixer device 13 produces WiFi signal generation device 11 and cable TV signal generation device 12 to produce, then transfers to user through coaxial cable.At user side, be provided with WOC terminal, the input of coaxial cable access WOC terminal, WOC by the WiFi signal extraction in mixed signal out, and export from WLAN mouth, and cable TV signal is from the TV mouth output of WOC terminal, can be accessed by the cable TV receiving equipments such as Set Top Box, digital intergrated unit.
In use there is following shortcoming in above-mentioned WOC network: WiFi signal is directly delivered to user WOC terminal after mixing with cable TV signal, only have the TV port of WOC terminal to have buffer action to WiFi signal, make the harmonic frequency of WiFi signal identical or approaching with the frequency of part cable TV signal, cause cable TV signal lower with respect to the signal to noise ratio of WiFi signal, and then affect the reception of cable TV signal on many channels, there is the generation of the problems such as mosaic, quiet frame, affect user and normally watch cable television program.
For solving the interference of above-mentioned WiFi signal to cable TV signal, prior art conventionally adopts at cable TV receiving equipment end and increases band pass filter.Although increase band pass filter, WiFi signal is had to certain filter action, in practical application, find, in WOC network, still can not eliminate cable TV signal completely and receive the phenomenons such as the mosaic occurring, quiet frame.
Based on this, need to eliminate the problem that WiFi signal disturbs cable TV signal from other aspect research, to guarantee the normal reception of cable TV signal in WOC network.
Summary of the invention
One of the purpose of this utility model is to provide a kind of WOC network, sets up the mode of distributor optimize the WOC network architecture by adopting in network, utilizes distributor to increase the Insertion Loss of WiFi signal, and then reduces the interference of WiFi signal to cable TV signal.
For solving the problems of the technologies described above, the WOC network using following technical proposals that the utility model provides realizes:
A kind of WOC network, comprises WiFi signal generation device, cable TV signal generation device and WOC terminal, and described WOC network also comprises:
Mixer, its signal input part is connected with described WiFi signal generation device and described cable TV signal generation device respectively;
Some grades of distributors that connect successively, the signal input part of first order distributor is connected with the signal output part of described mixer, and the signal output part of afterbody distributor is connected with the input of described WOC terminal.
Take into account network architecture cost and cable TV signal receiving intensity, described some grades of distributors are preferably three grades of distributors.
WOC network as above, in described three grades of distributors, first order distributor is 1 point of 3 distributor, second level distributor is 1 point of 4 distributor, third level distributor is 1 point of 2 distributor, the signal input part of described 1 point of 3 distributor is connected with the signal output part of described mixer, each signal output part of described 1 point of 3 distributor connects respectively the signal input part of 11 point of 4 distributor, each signal output part of described 1 point of 4 distributor connects respectively the signal input part of 11 point of 2 distributor, a signal output part of each 1 point of 2 distributor is connected with the signal input part of described WOC terminal.
WOC network as above for increasing the access point of cable TV signal, reduces the interference of WiFi signal simultaneously, and another signal output part of described 1 point of 2 distributor is also connected with the distributor of a 5-1000MHz.
WOC network as above, the double-path combiner that described mixer is 5-2500MHz.
Two of the purpose of this utility model is to provide a kind of CATV transmission system, and this system can compatible existing hfc plant and improved WOC network, for terminal use provides different cable TV access waies.
For realizing above-mentioned technical purpose, the CATV transmission system that the utility model provides adopts following structure to realize:
A kind of CATV transmission system, comprise WiFi signal generation device, cable TV signal generation device, the signal mixer that is connected with cable TV signal generation device with described WiFi signal generation device respectively, it is characterized in that, described transmission system also comprises:
Network distributor, its signal input part is connected with the output of described signal mixer, and an one output is connected with hfc plant;
Mixer, an one signal input part is connected with described WiFi signal generation device, and its another signal input part is connected with another output of described network distributor;
Some grades of distributors that connect successively and WOC terminal, the signal input part of first order distributor is connected with the signal output part of described mixer, and the signal output part of afterbody distributor is connected with the input of described WOC terminal.
CATV transmission system as above, for taking into account network architecture cost and cable TV signal receiving intensity, described some grades of distributors are preferably three grades of distributors.
CATV transmission system as above, in described three grades of distributors, first order distributor is 1 point of 3 distributor, second level distributor is 1 point of 4 distributor, third level distributor is 1 point of 2 distributor, the signal input part of described 1 point of 3 distributor is connected with the signal output part of described mixer, each signal output part of described 1 point of 3 distributor connects respectively the signal input part of 11 point of 4 distributor, each signal output part of described 1 point of 4 distributor connects respectively the signal input part of 11 point of 2 distributor, a signal output part of each 1 point of 2 distributor is connected with the signal input part of described WOC terminal.
As above CATV transmission system for increasing the access point of cable TV signal, reduces the interference of WiFi signal simultaneously, and another signal output part of described 1 point of 2 distributor is also connected with the distributor of a 5-1000MHz.
CATV transmission system as above, the double-path combiner that described mixer is 5-2500MHz.
Compared with prior art, advantage of the present utility model and good effect are:
1, the utility model by setting up some grades of distributors in WOC network, utilize the large feature of Insertion Loss of cable that distributor and distributor the connect Insertion Loss comparison cable TV signal to WiFi signal, can reduce the intensity of WiFi signal in transmitting procedure, increase the intensity of cable TV signal with respect to WiFi signal, and then the interference of reduction WiFi signal to cable TV signal, improve the reception accuracy of cable TV signal, avoided occurring the generation of the problems such as mosaic, quiet frame.
2, CATV transmission system of the present utility model by network distributor is set, control WiFi signal-selectivity and enter hfc plant or WOC network, make the CATV transmission system can compatible existing hfc plant and improved WOC network, for terminal use provides different cable TV access waies, improved the adaptability of system.
Read by reference to the accompanying drawings after embodiment of the present utility model, other features of the present utility model and advantage will become clearer.
Accompanying drawing explanation
Fig. 1 is the configuration diagram of existing WOC network;
Fig. 2 is the configuration diagram of an embodiment of the utility model WOC network;
Fig. 3 is the configuration diagram of another embodiment of the utility model WOC network;
Fig. 4 is the configuration diagram of an embodiment of the utility model CATV transmission system.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
Refer to Fig. 2, this figure is depicted as the configuration diagram of an embodiment of the utility model WOC network.
As shown in Figure 2, the WOC network of this embodiment includes WiFi signal generation device 21, cable TV signal generation device 22, mixer 23, some grades of distributors 24 and WOC terminal 25.
WiFi signal generation device 21 is used for producing the WiFi signal of certain frequency and some strength, can adopt existing apparatus to realize.Cable TV signal generation device 22 is used for producing cable TV signal, as DVB signal, is also to adopt existing apparatus to realize.WiFi signal generation device 21 is connected with an input of mixer 23 respectively with cable TV signal generation device 22, thereby from mixer 23, exports after utilizing mixer 23 that WiFi signal and cable TV signal are mixed into a road.Mixer 23 adopts the double-path combiner of 5-2500MHz to realize, to can mix more multifrequency cable TV signal and WiFi signal.Mixer 23 also can adopt existing structure to realize, and signal mixing principle and implementation method are also prior art.WiFi signal generation device 21, cable TV signal generation device 22 and mixer 23 are generally arranged in broadcasting and TV end, and the output connecting coaxial cable of mixer 23, transmits mixed signal by coaxial cable to user terminal.
The mixed signal that mixer 23 is exported, before entering into the WOC terminal 25 that is arranged on user house, is introduced in some grades of distributors 24.Some grades of distributor 24 operated by rotary motion are registered one's residence in end or corridor unit in building, are used for the mixed signal from broadcasting and TV to carry out sub-distribution again.Some grades of distributors 24 can be selected 1 grade or more multistage according to actual conditions, and the actual conditions here comprise that the WOC terminal number that will connect, local cable TV signal frequency range, cable TV signal receive the requirement of cost etc.If be only 1 grade of distributor, the signal input part of distributor is connected by coaxial cable with the signal output part of mixer 23, and each signal output part of distributor all can connect a WOC terminal 25.If distributor is multistage, the signal input part of first order distributor is connected by coaxial cable with the signal output part of mixer 23, each signal output part of afterbody distributor is connected with the input of a WOC terminal 25, and be connected successively between each distributor, concrete connected mode can be with reference to shown in figure 3 and the follow-up description to Fig. 3.
WOC terminal 25 is as the terminal of WOC network, operated by rotary motion is in user family, be used for extracting WFIF signal from mixed signal, and by its WLAN port output, and remaining cable TV signal will be by its TV port output, can be connected in the cable TV signal receiving equipments such as Set Top Box, digital intergrated unit, realize the reception to cable TV signal.
In the WOC of this embodiment network, owing to having set up some distributors, the cable that distributor itself and distributor connect is greater than the Insertion Loss to cable TV signal to the Insertion Loss of WiFi signal, therefore, can significantly reduce the WiFi signal strength signal intensity on transmission line, thereby improved the ratio of user side cable TV signal intensity and WiFi signal strength signal intensity, in the situation that this ratio is higher, can correct the interference of WiFi signal to some frequency range of cable TV signal, and then improved the reception accuracy of cable TV signal, avoided mosaic, the generation of the phenomenons such as quiet frame.
Please refer to Fig. 3, the figure shows the configuration diagram of another embodiment of the utility model WOC network.
As shown in Figure 3, the WOC network of this embodiment includes WiFi signal generation device 31, cable TV signal generation device 32 and mixer 33, the syndeton of this three part, to realize principle and function and Fig. 2 embodiment similar, can be with reference to the above-mentioned description to Fig. 2 embodiment.
In addition, the WOC network of this Fig. 3 embodiment also includes three grades of distributors, is respectively as 1 point of 3 distributor 34 of first order distributor, as 1 point of 4 distributor 35 of second level distributor and as 1 point of 2 distributor 36 of third level distributor.Wherein, the signal input part of 1 point of 3 distributor 34 is connected by coaxial cable with the signal output part of mixer 33, and each signal output part of 1 point of 3 distributor can connect respectively the signal input part (only showing 11 point 4 distributors 35 in figure) of 11 point 4 distributors 35; Each signal output part of 1 point of 4 distributor 35 connects respectively the signal input part (also only showing one 1 point 2 distributors 36 in figure) of 11 point 2 distributors 36.In these three distributors, 34 and 1 point of 4 distributor 35 of 1 point of 3 distributor is arranged in building mouth or corridor unit, and 1 point of 2 distributor is arranged in user family or user doorway, as certain user's special distribution device.
Accordingly, in user family, in certain room, be provided with WOC terminal 37, in another room, be also provided with one 1 point 2 distributors 38.Wherein, the input of WOC terminal 37 is connected with an output of 1 point of 2 distributor 36, for extract WFIF signal from mixed signal, then WiFi signal is exported through its WLAN port, and cable TV signal is exported through its TV port.And 1 point of 2 distributor 38 is with WOC terminal, the room that only carries out cable TV signal reception, not use, utilize distributor to use as the isolator of WiFi signal being done to further isolation, finally from a TV output of 1 point of 2 distributor 38, export cable TV signal.
This Fig. 3 embodiment is by arranging 34 and 1 point of 4 distributor 35 of 1 point of 3 distributor, when reduction WiFi signal disturbs cable TV signal, can make 12 user terminals of the WOC network coverage, on the basis that guarantees signal receiving strength, reduce network cost.By one 1 point 2 distributors 36 are additionally set, can increase user the output port that receives cable TV signal at user side, facilitate user's TV reception in chummery not.
Above-mentioned Fig. 3 embodiment is take three grades of distributors as example, but is not limited to this.And point way of every grade of distributor is also not limited to Fig. 3 embodiment, can replace as required.
Because WOC network is an emerging network, for having laid existing common HFC(Hybrid Fiber-Coaxial, hybrid fiber coax) user of network, may not need to be transformed into WOC network.Or in certain area, some user wishes to use common hfc plant, some user wishes to use WOC network.Based on this demand, the utility model also provides a kind of CATV transmission system that can compatible different access waies.
Refer to Fig. 4, this figure is depicted as the configuration diagram of an embodiment of the utility model CATV transmission system.
As shown in Figure 4, the CATV transmission system of this embodiment comprises the WiFi signal generation device 41, cable TV signal generation device 42, signal mixer 43, network distributor 44 and the mixer 46 that are positioned at broadcasting and TV end.Wherein, cable TV signal generation device 42 is connected with the input of signal mixer 43, and WiFi signal generation device 41 is connected with an input of signal mixer 43.The signal output part of signal mixer is connected with the input of network distributor 44, an output of network distributor 44 is connected with hfc plant 45, another output is connected with an input of mixer 46, and another input of mixer 46 is connected with WiFi signal generation device 41.In addition, the output of mixer 46 is also connected with some grades of distributors 47 by coaxial cable, and the output of some grades of distributors 47 is connected with WOC terminal 48.In this embodiment, mixer 46, some grades of distributors 47 and WOC terminal 48 are as a part for WOC network, its structure, principle, function etc. can be with reference to the descriptions of figure 2 embodiment, and the WiFi signal generation device 41 of this part and broadcasting and TV end and cable TV signal generation device 42 etc. form WOC network.
Below in conjunction with said structure, the course of work of the CATV transmission system of this embodiment is described:
If user selects hfc plant 45 to receive cable TV signal, the cable TV signal that the WiFi signal that WiFi signal generation device 41 produces and cable TV signal generation device 42 produce is exported after signal mixer 43 is mixed into a road mixed signal, mixed signal is input in network distributor 44, from an output of network distributor 44, accesses to hfc plant 45.Principle and the implementation method of framework, reception cable TV signal and the WiFi signal of hfc plant 45 can, with reference to prior art, not be specifically addressed at this.
If user's choice for use WOC network receives cable TV signal, no longer entering signal blender 43 of the WiFi signal that WiFi signal generation device 41 produces, but input to mixer 46; The cable TV signal that cable TV signal generation device 42 produces inputs in mixer 46 through signal mixer 43 and network distributor 44.Then, mixer 46 will mix WiFi signal and cable TV signal, after this, will enter in user family by some grades of distributors 47 and WOC terminal 48, and finally from the WLAN port of WOC terminal 48, export WiFi signal, from its TV port, export cable TV signal.The implementation procedure of this process and advantage can be with reference to the descriptions of figure 2 embodiment.
Above embodiment is only in order to the technical solution of the utility model to be described, but not is limited; Although the utility model is had been described in detail with reference to previous embodiment, for the person of ordinary skill of the art, the technical scheme that still can record previous embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of the utility model technical scheme required for protection.
Claims (10)
1. a WOC network, comprises WiFi signal generation device, cable TV signal generation device and WOC terminal, it is characterized in that, described WOC network also comprises:
Mixer, its signal input part is connected with described WiFi signal generation device and described cable TV signal generation device respectively;
Some grades of distributors that connect successively, the signal input part of first order distributor is connected with the signal output part of described mixer, and the signal output part of afterbody distributor is connected with the input of described WOC terminal.
2. WOC network according to claim 1, is characterized in that, described some grades of distributors are three grades of distributors.
3. WOC network according to claim 2, it is characterized in that, in described three grades of distributors, first order distributor is 1 point of 3 distributor, second level distributor is 1 point of 4 distributor, third level distributor is 1 point of 2 distributor, the signal input part of described 1 point of 3 distributor is connected with the signal output part of described mixer, each signal output part of described 1 point of 3 distributor connects respectively the signal input part of 11 point of 4 distributor, each signal output part of described 1 point of 4 distributor connects respectively the signal input part of 11 point of 2 distributor, a signal output part of each 1 point of 2 distributor is connected with the signal input part of described WOC terminal.
4. WOC network according to claim 3, is characterized in that, another signal output part of described 1 point of 2 distributor is also connected with the distributor of a 5-1000MHz.
5. according to the WOC network described in any one in claim 1 to 4, it is characterized in that the double-path combiner that described mixer is 5-2500MHz.
6. a CATV transmission system, comprise WiFi signal generation device, cable TV signal generation device, the signal mixer that is connected with cable TV signal generation device with described WiFi signal generation device respectively, it is characterized in that, described transmission system also comprises:
Network distributor, its signal input part is connected with the output of described signal mixer, and an one output is connected with hfc plant;
Mixer, an one signal input part is connected with described WiFi signal generation device, and its another signal input part is connected with another output of described network distributor;
Some grades of distributors that connect successively and WOC terminal, the signal input part of first order distributor is connected with the signal output part of described mixer, and the signal output part of afterbody distributor is connected with the input of described WOC terminal.
7. CATV transmission system according to claim 6, is characterized in that, described some grades of distributors are three grades of distributors.
8. CATV transmission system according to claim 7, it is characterized in that, in described three grades of distributors, first order distributor is 1 point of 3 distributor, second level distributor is 1 point of 4 distributor, third level distributor is 1 point of 2 distributor, the signal input part of described 1 point of 3 distributor is connected with the signal output part of described mixer, each signal output part of described 1 point of 3 distributor connects respectively the signal input part of 11 point of 4 distributor, each signal output part of described 1 point of 4 distributor connects respectively the signal input part of 11 point of 2 distributor, a signal output part of each 1 point of 2 distributor is connected with the signal input part of described WOC terminal.
9. CATV transmission system according to claim 8, is characterized in that, another signal output part of described 1 point of 2 distributor is also connected with the distributor of a 5-1000MHz.
10. according to the CATV transmission system described in any one in claim 6 to 9, it is characterized in that the double-path combiner that described mixer is 5-2500MHz.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320758144.4U CN203563145U (en) | 2013-11-27 | 2013-11-27 | WOC network and cable television transmission system |
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| CN201320758144.4U CN203563145U (en) | 2013-11-27 | 2013-11-27 | WOC network and cable television transmission system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130846A (en) * | 2016-08-09 | 2016-11-16 | 嘉兴佳利电子有限公司 | Miniaturization plug and play WOC terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130846A (en) * | 2016-08-09 | 2016-11-16 | 嘉兴佳利电子有限公司 | Miniaturization plug and play WOC terminal |
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