WO2007118356A1

WO2007118356A1 - A system for carrying out signal distribution using indoor television cable

Info

Publication number: WO2007118356A1
Application number: PCT/CN2006/000698
Authority: WO
Inventors: Zhenge Sun; Jiming Liu; Donglin Shen; Jingyi Li; Jianping Zhao
Original assignee: Zte Corporation
Priority date: 2006-04-17
Filing date: 2006-04-17
Publication date: 2007-10-25
Also published as: CN101461150B; CN101461150A

Abstract

A system for carrying out signal distribution using indoor television cable, includes indoor cable, cable deconcentrator, branching cable, terminal signal box, filtering composite module, WLAN access point AP and modem, the filtering composite module completes introducing down wireless local area networks signal, down Ethernet signal and television signal, these signals are output to the cable deconcentrator after filtering and mixing, then distributed to each terminal signal box; the terminal signal box is signal spread box, which separates down LAN signal, television signal and down Ethernet signal in the composite signal, and outputs them to the interface, the Ethernet signal and the wireless local area network signal are transmitted in two-direction in the system. The present invention transmits three kinds of signals at the same time through television cable which is indoor widely, and three kinds of signals are non-interference.

Description

System for signal distribution using indoor television cable

Field of the Invention This invention relates to indoor television cable signal distribution, and more particularly to systems for distributing television, home telephone line network (HPNA) or multimedia coaxial cable alliance (MoCA) and wireless local area network signals using indoor television cables.

Background technique

The internal interconnection of indoor devices and the connection to external networks are key to achieving a "digital home." Many devices in modern homes have Ethernet and wireless LAN connectivity, so Ethernet and wireless LAN connectivity are becoming more and more important in the home.

Traditional Ethernet signals are transmitted to individual rooms via Ethernet cables. This approach is more suitable for new homes, and many older homes do not have an Ethernet cable, and rewiring costs are high. Although wireless LAN can theoretically be transmitted to all corners of the home in a wireless manner, in reality, the home environment is complicated, which inevitably leads to a "dead corner" or poor communication capability.

The development of communication, especially the "digital home", requires an effective communication medium that can be used in the home, such as telephone lines, power lines, television cables and air media, that is, spatial frequency resources to transmit Ethernet signals and wireless LAN signals to the home. The method of the corner. The TV cable system of the room is composed of the household cable, the cable splitter, the branch cable and the terminal signal box in each room. If it can be used, Ethernet and wireless LAN can be used without increasing the cost. Transfer to various locations.

Summary of the invention

The technical problem to be solved by the present invention is to provide a system for signal distribution by using an indoor television cable, which can simultaneously transmit television signals and Ethernet signals by using a television cable widely existing indoors, without generating the original television signal in the television cable. Interfere with each other.

In order to solve the above technical problem, the present invention provides an indoor television cable. A signal distribution system comprising an entry cable, a cable splitter, a drop cable and a terminal signal box, characterized in that it further comprises a filter combination module and an Ethernet signal modem, wherein:

The Ethernet signal modem inputs a downlink Ethernet signal to the filter combining module, and the filter combining module also receives a television signal input by the home cable, after completing the introduction, filtering and mixing of the television signal and the Ethernet signal, Outputting the television signal and the downlink Ethernet signal to the cable splitter, and then distributing the cable splitter to each terminal signal box; the uplink Ethernet signal is transmitted from the terminal signal box to the Ethernet via the same path Signal modem.

Further, the above system may further have the following features: The Ethernet signal modem is a home telephone line network HPNA modem, or a Multimedia Coax Alliance MoCA modem, and the output to the filter combining module is an HPNA signal or a MoCA signal.

Further, the above system may further have the following features: The filter combination module includes a connector N2, a connector N3, a connector N4, a filter and impedance converter, a filter, and a combining component, and the television signal is introduced through the connector N2. The filter is sent, the Ethernet signal is introduced into the filter and the impedance converter through the connector N3, and the combining component receives the two output signals of the filter, the filter and the impedance converter for mixing, and then passes through the connector. N4 is transmitted to the cable splitter; the Ethernet signal is transmitted bidirectionally, and in the reverse direction, the connector N3 is reached along the same path downstream through the connector N4.

Further, the above system may further have the following features: The terminal signal box is a signal expansion box, including a passive signal separator, separating the TV signal and the Ethernet signal and outputting to the TV interface and the Ethernet respectively. Device interface.

Another technical problem to be solved by the present invention is to provide a system for signal distribution by using an indoor television cable, which can simultaneously transmit a television signal and a wireless local area network signal by using a television cable widely existing in the room, and does not simultaneously with the original television in the television cable. Signals interfere with each other.

In order to solve the above technical problem, the present invention further provides a system for signal distribution using an indoor television cable, including an entry cable, a cable splitter, a branch cable, and a terminal signal box, and further comprising a filter combination module and Wireless LAN access point AP, where: The AP inputs a downlink wireless local area network signal to the filtering combination module, and the filtering combination module also receives a television signal input by the household cable, and after the television signal and the wireless local area network signal are introduced, filtered, and mixed, the television signal is obtained. And outputted to the cable splitter together with the downlink LAN signal, and then distributed to each terminal signal box by the cable splitter, the terminal signal box is a signal expansion box, and the input signal is separated into a TV signal and a downlink LAN signal, and then They are sent to the television and the wireless local area network terminal device through the TV interface and the antenna respectively; the uplink wireless local area network signal is transmitted from the terminal signal box to the AP via the same path.

Further, the foregoing system may further have the following features: the AP directly feeds the wireless local area network signal into the filtering combination module, and receives an uplink local area network signal from the filtering combination module; or, the AP first feeds the wireless local area network signal A signal expansion box is inserted, and the signal expansion box is connected to the filter combination module through a cable, and receives an uplink local area network signal from the filter combination module along the same downlink path.

Further, the above system may further have the following features: the AP directly feeds the wireless local area network signal into the filter combination module, and the filter combination module includes a connector N1, a connector N2, a connector N4, a filter B, and a filter. D and the combining component, the television signal is introduced through the connector N2 and sent to the filter B for filtering. The wireless local area network signal is introduced through the connector N1 and sent to the filter D for filtering, and the combining component receives the filter B and the filter. The two output signals of D are mixed and transmitted to the cable splitter via the connector N4; the wireless local area network signal is transmitted bidirectionally, and in the reverse direction, the connector N1 is passed along the same path to the connector N1, and then transmitted. To the AP.

Further, the above system may further have the following features: the AP first feeds the wireless local area network signal into a signal expansion box, and the signal expansion box is further connected to the filter combination module through a cable; the filter combination module includes a connector N1, The connector N2, the connector N4, the filter B, the filter D, the combining component and the branching component, the television signal is introduced through the connector N2, sent to the filter B for filtering, and the wireless local area network signal is introduced through the connector N1, and is fed. The filter D is filtered, and the filtered wireless local area network signal and the television signal are mixed by a combined component and output to the cable splitter through the connector N4; meanwhile, a television signal is taken out through the branching component, and the connector N4 is descended. The uplink wireless LAN signal transmitted in the reverse direction of the path is in another The road components are mixed, output to the connector N1, and transmitted to the AP via a cable and the signal expansion box as a feed point.

Further, the above system may further have the following features: the signal expansion box for receiving the wireless local area network signal fed by the AP includes a passive signal separator, a TV interface and a "T" type connector, the signal separator The television signal and the wireless local area network signal are separated and output to the TV interface and the "T" type connector respectively, and the other ends of the "T" type connector are respectively connected to the external antenna and the antenna port of the AP.

Further, the above system may further have the following features: The signal expansion box connected to the cable splitter includes a passive signal separator, a TV interface and an antenna, and the signal separator separates the television signal from the wireless local area network signal. Output to the TV interface and antenna respectively.

Further, the above system may further have the following features: an active amplification module is further disposed between the signal separator and the antenna in the signal expansion box connected to the cable splitter, and the cable splitter is also provided before A power entity for receiving a DC feed, the power entity is further provided with a capacitor, and the cable splitter is a DC-connectable cable splitter.

Further, the above system may further have the following features: The active amplifying module includes two circulators for separating and isolating two-way transceiving signal transmission, and uplink and/or downlink between two circulators. An amplifier is disposed thereon; or the active amplification module includes a circulator and a dual-polarized antenna for performing isolation of bidirectional signal transmission, and uplink and/or downlink between the circulator and the dual-polarized antenna An amplifier is placed on the link.

Further, the above system may further have the following features: the two amplifiers disposed between the two circulators or disposed between the circulator and the dual-polarized antenna have a gain of 5 to 18 dB, and the uplink amplifier The gain is greater than the gain of the amplifier on the downlink.

Further, the above system may also have the following features: The wireless local area network signal is in the 2.4 GHz industrial, scientific, and medical (ISM) free frequency band.

Still another technical problem to be solved by the present invention is to provide a system for signal distribution using an indoor television cable, which can simultaneously transmit television signals, wireless local area network signals, and Ethernet signals using a television cable widely existing in the room, without being connected to a television cable. Original TV signal Mutual interference.

In order to solve the above technical problem, the present invention further provides a system for signal distribution by using an indoor television cable, including an entry cable, a cable splitter, a branch cable, and a terminal signal box, and further comprising a filter combination module, WLAN access point AP and Ethernet signal modem, where:

The filtering combination module receives a downlink wireless local area network signal input by the AP, and a downlink Ethernet signal input by the Ethernet signal modem and a television signal input by the home cable, after the introduction, filtering and mixing of the three signals are completed, Outputting the mixed signals to the cable splitter, and then distributing the cable splitter to each terminal signal box; the terminal signal box is a signal expansion box, and separating the downlink LAN signal in the mixed signal to output to the antenna, Outputting the TV signal to the TV interface, separating the downlink Ethernet signal to the Ethernet device interface or outputting to the TV interface together with the TV signal; the uplink Ethernet signal is transmitted from the terminal signal box to the Ethernet signal modem via the same path The uplink wireless local area network signal is transmitted from the terminal signal box to the AP via the same path.

Further, the above system may further have the following features: the Ethernet signal modem is a home telephone line network HPNA modem, or a multimedia coaxial cable alliance MoC A modem, and the output of the filter combination module is an HPNA signal or a MoC A signal.

Further, the above system may further have the following features: the AP directly feeds the wireless local area network signal into the filtering combination module, and the filtering combination module includes a connector N1, a connector N2, a connector N3, a connector N4, and a filtering. And the impedance converter, the filter B, the filter D and the combining component, the Ethernet signal is introduced into the filter and the impedance converter through the connector N3, and the television signal is introduced through the connector N2 and sent to the filter B, the wireless local area network The signal is introduced into the filter D through the connector N1, and the combining component mixes the filter and the impedance converter, the Ethernet signal outputted by the filter B and the filter D, the television signal and the wireless local area network signal, and then passes through the connector. N4 is directly transmitted to the cable splitter, or transmitted to the cable splitter via another filter C; the upstream Ethernet signal arrives at the connector along the same path through the connector N4 through the connector N4 in the filter combination module. N3, the uplink wireless LAN signal is in the filter combination module The connector N1 is reached through the connector N4 along the downstream phase and the same path.

Further, the above system may further have the following features: the AP first feeds the wireless local area network signal into a signal expansion box, and the signal expansion box is further connected to the filter combination module by a cable; the filter combination module includes a connector N1 , connector N2, connector N3, connector N4, filter and impedance converter, filter B, filter D, shunt component and combination component, Ethernet signal is introduced through connector N3 and then sent to the filter and impedance converter The television signal is introduced into the filter B through the connector N2, and the wireless local area network signal is introduced into the filter D through the connector N1, and the Ethernet signal of the filter and the impedance converter, the filter B and the filter D are output. The television signal and the wireless local area network signal are mixed by the combined component, and then transmitted to the cable splitter through the connector N4; at the same time, the filter and the impedance converter, the Ethernet signal output by the filter B, and the television signal are also divided. The routers are all separated, and the uplink wireless LAN signal transmitted from the connector N4 in the reverse direction of the downlink path is After the combined components are mixed, they are output to the connector N1 and then transmitted to the signal expansion box as a feed point via the cable; the uplink Ethernet signal is connected to the same path along the downlink through the connector N4 in the filter combination module. The device N3 is then transmitted to the Ethernet modem.

Further, the above system may further have the following features: The signal expansion box connected to the cable splitter includes a passive signal separator, a TV interface, an Ethernet device interface, and an antenna, and the signal separator is used to turn the television Signal, Ethernet signal and wireless LAN signal separation, output TV signal to TV interface, output Ethernet signal to Ethernet device interface, output wireless LAN signal to antenna; or, signal splitter only input signal The signal is separated into a wireless local area network signal and a mixed signal of a television and an Ethernet, and the wireless local area network signal is output to an antenna, and a mixed signal of the television and the Ethernet is output to the TV interface.

As can be seen from the above, the present invention utilizes a television cable widely used indoors to simultaneously transmit television signals, The Ethernet signal and/or the wireless LAN signal do not interfere with the original TV signal in the TV cable. It has the characteristics of strong compatibility, economy and multiple configuration capabilities. Drawing fan

1 is a structural diagram of a system for supporting a television, an HPNA or MoCA, and a wireless local area network signal according to a first embodiment of the present invention, wherein a wireless local area network signal is fed at a signal expansion box;

2 is a system diagram of another television, HPNA or MoCA, wireless local area network signal according to the first embodiment of the present invention, wherein the wireless local area network signal is fed at a filter combining module (Filter Combiner);

Figure 3a is a signal connection diagram of the filter combination module of Figure 1;

Figure 3b is a signal connection diagram of the filter combination module of Figure 2;

Figure 4 is a schematic structural view of the signal expansion box of Figure 1 or Figure 1;

5 is a schematic diagram of a wireless local area network signal bidirectional amplification structure that can be used in FIG. 4; FIG. 6 is a schematic diagram of another wireless local area network signal omnidirectional amplification structure that can be used in FIG. 4; FIG. 7a is the filter combination module of FIG. Schematic diagram; Figures 7b and 7c are schematic diagrams of two implementations of the filter combining module of Figure 2.

8 is a structural diagram of a system for supporting a television, an HPNA/MoCA signal according to a second embodiment of the present invention;

Figure 9 is a schematic diagram of the filter combining module of Figure 8;

Figure 10 is a structural diagram of a system for supporting television and wireless local area network signals according to a third embodiment of the present invention;

11 is a structural diagram of another system for supporting television and wireless local area network signals according to a third embodiment of the present invention;

12a and 12b are schematic diagrams of the filter combination module of FIG. 10 or FIG. 11, respectively; FIG. 13 is a schematic diagram of a special signal expansion box. First embodiment

This embodiment simultaneously transmits a television signal, an Ethernet signal, and a wireless local area network signal using a television cable widely existing in the room. Among them, the WLAN signal is in the 2.4GHz industrial, scientific research and medical (ISM) free band, and the Ethernet signal needs to be modulated by HPNA or MoCA and transmitted in the TV cable. In addition to the HPNA may affect the upstream of the TV, the wireless LAN signal, HPNA/MoCA signal and the unidirectional TV signal do not overlap in frequency, which provides the necessary basis for the simultaneous transmission of the three signals in the cable. HPNA occupies 0 - 24MHz frequency, CATV occupies 0 ~ 950MHz frequency, MoCA occupies 860 ~ 1550MHz, part of MoCA repeated with CATV can automatically adjust to avoid interference, wireless LAN signal occupies 2400 ~ 2500MHz frequency band. For HPNA signals, the present invention may not perform frequency shift processing. In other words, HPNA only affects television upstream.

Figures 1 and 2 show two alternative configurations of the system of the present embodiment, in addition to the Cable Splitter 103, including a Wireless Local Area Network Access Point (AP) 110, an HPNA/MoCA Modem 108 ( Generally indoors, but can also be placed outdoors) as well as the following three functional entities:

The first functional entity is a filter combining module 100 that is coupled to the input of the drop cable and the HPNA/MoCA modem for the introduction, filtering, mixing, and distribution of television signals, HPNA/MoCA signals, and wireless local area network signals. The output signal includes a television signal, an Ethernet signal, and an HPNA/MoCA signal, the output of which is connected to the capacitor 107 in front of the power entity 102;

The second functional entity is the power entity 102, which is used to implement the feed function via the TV cable. When the WLAN signal needs to be actively amplified in the signal expansion box, a DC feed is required, so the power entity 102 is placed in front of the cable splitter. The capacitor 107 disposed between the power source and the filter combination module functions as a DC blocking.

The third functional entity is the Extension Box P104, P105, which is used to replace the original terminal signal box of the cable TV, to realize the wired connection with the TV device, HPNA or MoCA device and the wireless connection with the wireless LAN terminal device. , the number can be set as needed. The filter combination module 100, the capacitor 107, the power source entity 102, and the cable splitter 103 are connected by a television cable.

The filter combination module 100 can simultaneously support various combinations of passive and active signal expansion boxes. For an environment with large TV cable loss, large coverage, and high service rate requirements, an active signal expansion box can be used, and vice versa. The cost of the passive signal expansion box.

The signal expansion boxes P104 and P105 are connected to the TV through a closed-circuit television interface (ie, TV interface, F-type connection), and are respectively wired to HPNA or MoCA-related devices through RJ11 interface or F-type connection (indicated as HPNA/MoCA). Interface), wirelessly connected to the wireless LAN terminal device through the antenna. Wherein, the signal expansion box P104 may have one or more, and the signal expansion box P105 refers to the signal expansion box which is a feeding point of the wireless local area network signal.

If the original cable splitter is DC, the original cable splitter can be used for indoor signal distribution. If the original cable splitter is DC, it needs to be replaced with a DC splitter for indoor signal. distribution.

This embodiment uses the original cable splitter 103 instead of the cable splitter function in the filter combination module 100. In addition to saving a certain cost, the main advantage is to achieve a more flexible signal distribution function. Cable Splitter 103 The separate box ensures that the number of distribution branches can be adapted to the specific situation of the home, while the total number of branches allocated in the integrated mode is a fixed value, which will result in power loss or insufficient number of distribution branches.

In the system shown in Figure 1, the WLAN signal is fed at a signal expansion box, and in the system of Figure 2, the WLAN signal is fed at the filter combining module. In Figure 1, the AP 110 antenna port is connected to a "T" type connector 106, and the other end of the "T" type connector 106 is connected to the external antenna 109 and the signal expansion box P105, so that the wireless local area network signal can be transmitted through the signal expansion box. P105, television cable, filter combination module 100 and cable splitter 103 are extended to other signal expansion boxes P104. The wireless local area network signal radiated by the AP 110 in FIG. 2 is directly fed into the filter combining module 100 and then extended to the other signal expansion box P104 via the cable splitter 103. The main difference between FIG. 1 and FIG. 2 is that a part of the AP signal energy in FIG. 1 is output through the antenna 109. The other part is distributed by coaxial cable. The AP signal capability in Figure 2 is all distributed through the cable. For TV signals, HPNA/MoCA signals, the distribution in the systems of Figures 1 and 2 is the same. That is, the TV signal is fed to the filter combining module 100 and then extended to the signal expansion boxes P104 and P105 through a cable distribution box 103. The HPNA/MoCA modem 108 sequentially transmits the two-way transmission through the filter combining module 100, the cable splitter 103, the signal expansion box P104, or the television cable and the signal expansion box P105.

Figure 3a is a signal connection diagram of the filter combining module of Figure 1. Figure 3b is a signal connection diagram of the filter combination module of Figure 2. For TV signals, they are transmitted from N2 to N1 and from N2 to N4 in one direction. For HPNA/MoCA signals are transmitted bidirectionally between N3 to N4 and N3 to N1. The main difference is the way of feeding the wireless LAN signal. For wireless LAN signal transmission, Figure 3a first accesses the signal expansion box P105, then passes through the cable to N1, and then transmits through the filter combination module 100. The wireless LAN signal in Figure 3b is transmitted by the local AP direct input filter combination module 100, and is not transmitted via the cable. From the perspective of the filter combining module 100, the requirement of silent transfer is satisfied between N1 and N4.

Figure 7a is a schematic diagram of the filter combination module of Figure 1, supporting the introduction, filtering, mixing, and distribution of television signals, HPNA/MoCA signals, and wireless local area network signals. The television signal is introduced through the connector N2 710, and the output signal of the filter and impedance transformer 701 (completed HPNA/MoCA signal filtering and impedance transformation) is filtered by the filter B 702 and passed through the .2:1 combining component 703. After mixing, finally through the filter C 704 to complete the TV signal and HPNA / MoCA signal filtering, divided into two by the 1:2 branching component 705, one way through the 2:1 combining component 707 and the connector N4 712 to reach the cable distribution The device 103 is redistributed to each of the signal expansion boxes P104, and the other is connected to the signal expansion box P105 through the 2:1 combining unit 706 and the connector N1 711. If the connector 711 is directly connected to the AP, the TV signal of this interface will not be used. Filtering C is used to filter the mixed signal of the TV and HPNA/MoCA to further ensure further isolation. If the indicator requirements are high, it is necessary, and the indicator requirements are not high or may not be set.

HPNA/MoCA signal is introduced through connector N3 709, filtered and impedance transformer The output signal of 701 and filter B 702 is mixed by the 2:1 combining component 703, and then the signal of the TV signal and the HPNA/MoCA signal is filtered by the filter C 704, and then split into two paths by the 1:2 branching component 705. All the way to the cable splitter 103 through the 2:1 combining component 707 and the connector N4 712, and then distributed to the respective signal expansion boxes P104, and the other way is connected to the signal expansion box through the 2:1 combining component 706 and the connector N1 711. P105. If connector 711 is directly connected to the AP, the HPNA/MoCA signal for this port will not be used. In the reverse direction, the HPNA/MoCA signal arrives at connector N3 709 along the same downstream path through connector N4 712 and/or connector N1 711.

The WLAN signal is introduced through connector N1 711, through the 2:1 combining component 706, one output through filter D 708, through the 2:1 combining component 707 to connector N4 712, and finally through the cable splitter The other signal expansion box P104, which is output via the 2:1 combining unit 706, cannot enter the connector N3 709 and the connector N2 710 because of the effective isolation of the filter and the impedance transformer, the filter B, and the filter C. The reverse direction signal of the WLAN arrives at the connector N1 711 along the same path downstream through the connector N4 712. Similarly, the isolation of the filter cannot enter the connector N2 710 and the connector N3 709. The isolation of the TV signal and the HPNA/MoCA signal is achieved by filter B, filtering and impedance transformers.

It should be noted that the branching component and the combining component in Fig. 7a can be completely connected by other means to achieve the same function. For example, the two divided components can be used to separate the filtered television signal and the Ethernet signal separately. Two ways, then mixing one TV signal and one Ethernet signal and the filtered downlink wireless LAN signal in one 3:1 combining component to the connector N4, and the other TV signal, another Ethernet signal and The uplink wireless LAN signal transmitted from the connector N4 along the same downlink path is mixed in another 3:1 combining component and output to the connector N1, and the effect is completely equivalent.

Figure 7b shows the implementation of the filter combination module when the system adopts the structure of Figure 2, that is, when the wireless LAN signal feed point is set in the filter combination module. Since the television signal and the HPNA/MoCA signal need not be transmitted to the connector N1, the 2:1 combining component 706 can also be cancelled, and the wireless local area network signal can be output directly to the connection via the filter D 708 and the 2:1 combining component 707. The N4 712; in the same time cancels the 1:2 branching component 705, and sends the output of the filter C 704 directly to the 2:1 combining component 707. . Figure 7c is another schematic diagram of the implementation of the wireless LAN signal directly fed into the filter combination module. Unlike Figure 7a, the TV signal, HPNA and MoCA signals, and wireless LAN signals are filtered separately and then passed through a 3:1 combination. After passing through filter C 704, it is sent to N4. The filter C here needs to make the television signal, the HPNA and MoCA signals, the wireless local area network signal pass through as low as possible, and the signal in other frequency bands is suppressed as much as possible. If the filtering requirement is not high, it is also conceivable to omit the filter C.

4 is a schematic structural diagram of a signal expansion box P104, including a passive signal separator 402, which can separate a TV, HPNA or MoCA, wireless LAN three-way signal, and output to an antenna 403, a TV interface 404, and an HPNA/MoCA interface 405.

The way of active amplification is shown in Figure 5 and Figure 6. Signal detection is used to extract the transceiving control signal using two circulators 501 and 503 or a circulator 501 plus a dual polarized antenna 601, which is primarily a cost issue. The signal expansion box P104 can be passive or active. Figure 4 uses active amplification. There is an active amplification module 401 between the antenna 403 and the signal separator 402. Module for active amplification of wireless LAN signals. The active amplification module 401 specifically has the following two different structures:

The active amplification mode of the wireless local area network signal in FIG. 5 is to separate and isolate the bidirectional transceiving signal transmission by using two loopers 501 and 503, respectively, for the bidirectional signal passing through two amplifiers 502 between the two loopers and The 504 is amplified to avoid the extraction of the control signal of the wireless local area network signal. The antenna 403 can be built in or externally.

In order to avoid the occurrence of self-excitation, on the one hand, the isolation of the circulators 501 and 503 should be as high as possible, and at the same time, the gain of the amplifiers 502 and 504 is relatively low, such as 5~18 dB, in this embodiment, at 10 dB, and generally The gain of the amplifier 502 is greater than the gain of 504, that is, the uplink gain is larger.

The active amplification mode of the wireless local area network signal in FIG. 6 is to use a ring type 501 and a han-polarized antenna 601 to achieve two-way signal transmission isolation, and the silent direction signal is respectively passed between the ring type and the silently polarized antenna. Two amplifiers 502 and 504 are amplified to avoid Adopting extraction of control signals for wireless local area network signals;

Similarly, in order to avoid the occurrence of self-excitation, on the one hand, the isolation of the circulator 501 is made as high as possible, and at the same time, the gain of the amplifiers 502 and 504 is relatively low, about 10 dB, and the gain of 502 is generally greater than 504. That is, the uplink gain is larger.

The active amplification of the wireless local area network signals in Figures 5 and 6 can be unidirectionally amplified to improve unidirectional performance. When only the amplification of the uplink from the WLAN terminal to the AP is performed, only the amplifier 502 is reserved; when only the amplification of the downlink from the AP to the WLAN terminal is performed, only the amplifier 504 is reserved. Of course, if passive mode is used, both amplifiers 502 and 504 should be cancelled.

Figure 13 is a special case of the signal expansion box. Compared with Figure 4, the difference is that there are only two outputs, one is the wireless LAN signal output through the external antenna or the built-in antenna 403, and the other is through the TV signal and The mixed signal of the MoCA signal is output through a standard television interface (F-connection) 405.

In addition to the structure of two circulators, or a circulator-double-polarized antenna, the active amplification module of the present invention may also employ a structure known or achievable.

In particular, the signal extension box P105 that receives the wireless local area network signal fed by the AP does not require an active amplification module and must use an external antenna.

Second embodiment

In this embodiment, the television signal and the Ethernet signal are simultaneously transmitted by using a television cable widely existing in the room, and the wireless local area network signal is not transmitted.

As shown in FIG. 8, the system of this embodiment includes only the HPNA/MoCA modem 108, the filter combining module 200, the cable splitter 103, and one or more signal expansion boxes P204, which are sequentially connected, for each of the entities for television signals and Ethernet. The processing function of the signal is identical to that of the first embodiment. Since it is not necessary to perform amplification of the wireless local area network signal, the cable splitter can be DC-blocked, and the structure of the filter combining module 200 and the signal expansion box P204 is somewhat different from that of the first embodiment. FIG. 9 is a structural diagram of the filter combining module 200 of the present embodiment, which supports introduction, filtering and mixing of television signals and HPNA/MoCA signals. The television signal is introduced through the connector N2 710. After the filter signal is filtered by the filter B 702, the output signal of the filter and impedance converter 701 is mixed by the 2:1 combining component 703, and then reaches the cable via the connector N4 712. The line unit 103 is distributed to the respective signal expansion boxes P204. The HPNA/MoCA signal is introduced through connector N3 709, filtered and the output signals of impedance transformer 701 and filter B 702 are mixed by 2:1 combining component 703, and then passed through connector N4 712 to the cable splitter. 103, assigned to each signal expansion box P204; in the reverse direction, the HPNA/MoCA signal reaches the connector N3 709 through the connector N4 712 along the same downstream path.

The structure of the signal expansion box P204 can be referred to FIG. 5, but only includes a signal splitter 402, a TV interface 404, and an HPNA/MoCA interface 405 for processing HPNA or MoCA, two-way signals. It is also possible to mix the TV signal and the HPNA/MoCA signal from the TV interface without using a demultiplexer.

Third embodiment

In this embodiment, a TV cable and a wireless local area network signal are simultaneously transmitted by using a television cable widely existing in the room, and an Ethernet signal is not transmitted.

Depending on the WLAN signal feed point, the system of this embodiment can also have two configurations, as shown in Figures 10 and 11, respectively. Overall, the system of Figure 10 is essentially the same as Figure 1, and the WLAN signals are fed from a signal expansion box, except that the system in Figure 10 does not have an HPNA/MoCA modem 108. The system of FIG. 11 is basically the same as that of FIG. 2, and the wireless local area network signal is fed from the filter combining module 100. In addition, since the passive signal expansion boxes P304 and P305 are used here, the DC feeding point 102 and the capacitor are eliminated. 107. The other components and their connections are the same, and here is no longer - repeat.

The structure of the filter combining module 300 and the signal expansion boxes P304, P305 is also somewhat different from that of the first embodiment in terms of the structure of the individual components. 12a is a structural diagram of the filter combining module 300 of FIG. 10, supporting television signals and wireless Introduction, filtering, mixing and distribution of LAN signals. The television signal is introduced through the connector N2 710. After the filter signal is filtered by the filter B 702, it is divided into two paths through the 1:2 component, and all the way to the cable splitter 103 through the 2:1 combining component 707 and the connector N4 712. It is distributed to each of the signal expansion boxes P304, and the other is connected to the signal expansion box P305 through the 2:1 combining unit 706 and the connector N1 711. If the connector 711 is directly connected to the AP, the TV signal of this port will not be used.

The WLAN signal is introduced through the connector N1 711, passes through the 2:1 combining component 706, one output passes through the filter D 708, passes through the 2:1 combining component 707 to the connector N4 712, and finally is distributed through the cable splitter. The other signal output box P104, which is output via the 2:1 combining unit 706, cannot enter the connector N2 710 because of the effective isolation of the filter B. The reverse direction signal of the wireless LAN reaches the connector N1 711 along the same path downstream through the connector N4 712. Similarly, the isolation of the filter cannot enter the connector N2 710.

12b is a structural diagram of the filter combining module 300 of FIG. 11. Because the AP is directly fed into the filtering combination module, there is no need to transmit the television signal to the connector N1, so the filtering combination module does not need to perform signal distribution, and is structurally Compare the singles. As shown in the figure, the TV signal is introduced through the connector N2 710, and after the filter signal is filtered by the filter B 702, the 2:1 combining component 707 is fed.

Divided into two paths, all the way to the cable splitter 103 through the 2:1 combining component 707 and the connector N4 712, and then distributed to the respective signal expansion boxes P304, and the other way is connected through the 2:1 combining component 706 and the connector N1 711. Go to signal expansion box P305. If the connector 711 is directly connected to the AP, the TV signal of this port will not be used.

The WLAN signal is introduced through connector N1 711, passed through filter D 708 to 2:1 combining component 707 to connector N4 712, and finally distributed to each signal expansion box P104 via cable splitter, after 2:1 combination The other way output by component 706 is unable to enter connector N2 710 due to the effective isolation of filter B. The reverse direction signal of the WLAN then reaches the connector N1 711 along the same downstream path through the connector N4 712. Similarly, the isolation of the filter cannot enter the connector N2 710. The signal expansion box P304 processes the two signals of the wireless local area network and the television. If two-way amplification of the wireless local area network signal is required, one structure includes: a signal separator 402 for processing two signals of the wireless local area network and the television, an external antenna or an internal antenna. 403, TV interface 404, circulators 501 and 503, amplifiers 502 and 504; another structure includes a signal separator 402 for processing wireless local area network, television two-way signals, a dual-polarized antenna 601, a TV interface 404, a circulator 501, The amplifiers 502 and 504 are connected in the same manner as shown in Figures 4 to 6. In addition, in this embodiment, the amplifiers may be disposed only on the uplink or downlink, or no amplifier is provided. In the case of the signal extension box P104, it is only necessary to cancel the HPNA/MoCA interface.

The signal expansion box P305, which is a feeding point of the wireless local area network signal, processes two signals of the wireless local area network and the television, including a signal separation 402" for processing two signals of the wireless local area network and the television, an external antenna 109, a TV interface 404, and the like. Compared with the signal expansion box P105 of the embodiment, it is only necessary to cancel the HPNA/MoCA interface, and the connection relationships of other modules are the same.

Various changes can be made based on the above embodiments. For example, those skilled in the art can clearly understand that the present embodiment is equally applicable to the allocation of Bluetooth signals. The Bluetooth signal occupies a signal bandwidth of 2400 to 2500 MHz, which the present invention regards as a special wireless local area network signal.

In addition, the present invention can integrate the cable splitter (Distribution Box and filter combiner, compared with the solution separately set in the above embodiments, only need to connect the cable splitter between the distribution box and the filter combiner The cable is changed to an internal connection, and the structure of the filter combiner is identical.

Industrial applicability

The invention simultaneously transmits the Ethernet signal and the wireless local area network signal by using the television cable widely existing in the indoor, and at the same time does not cause mutual interference with the original television signal in the television cable. It has the characteristics of strong compatibility, economy and multiple configuration capabilities. The invention can be extended to support television P

WO 2007/118356 signal, Λ. Time transfer and support for two special cases of power signal and wireless LAN signal simultaneous transfer.

Claims

Claim

A system for signal distribution using an indoor television cable, comprising a drop cable, a cable splitter, a branch cable, and a terminal signal box, further comprising a filter combining module and an Ethernet signal modem, wherein:

The Ethernet signal modem inputs a downlink Ethernet signal to the filter combining module, and the filter combining module also receives a television signal input by the home cable, after completing the introduction, filtering and mixing of the television signal and the Ethernet signal, Outputting the television signal and the downlink Ethernet signal to the cable splitter, and then distributing the cable splitter to each terminal signal box; the uplink Ethernet signal is transmitted from the terminal signal box to the ether via the same path Network signal modem.

2. The system of claim 1, wherein the Ethernet signal modem is a home telephone line network HPNA modem, or a Multimedia Coax Alliance MoCA modem, and the HPNA signal is output to the filter combining module. Or MoCA signal.

3. The system according to claim 1, wherein the filter combining module comprises a connector N2, a connector N3, a connector N4, a filter and an impedance transformer, a filter, and a combining component, and the television signal is connected through After the N2 is introduced, the filter is sent to the filter. The Ethernet signal is introduced into the filter and the impedance converter through the connector N3, and the combining component receives the two output signals of the filter, the filter and the impedance converter for mixing. The connector N4 is then transmitted to the cable splitter; the Ethernet signal is transmitted bidirectionally, and in the reverse direction, the connector N3 is passed along the same path downstream to the connector N3.

4. The system according to claim 1, 2 or 3, wherein the terminal signal box is a signal expansion box comprising a passive signal separator, separating the television signal and the Ethernet signal respectively Output to the TV interface and Ethernet device interface.

5. A system for signal distribution using an indoor television cable, comprising an entry cable, a cable splitter, a branch cable, and a terminal signal box, further comprising a filter combination module and a wireless local area network access point AP, wherein: The AP inputs a downlink wireless local area network signal to the filtering combination module, and the filtering combination module also receives a television signal input by the household cable, and after the television signal and the wireless local area network signal are introduced, filtered, and mixed, the television signal is obtained. And outputted to the cable splitter together with the downlink LAN signal, and then distributed to each terminal signal box by the cable splitter, the terminal signal box is a signal expansion box, and the input signal is separated into a TV signal and a downlink LAN signal, and then They are sent to the television and the wireless local area network terminal device through the TV interface and the antenna respectively; the uplink wireless local area network signal is transmitted from the terminal signal box to the AP via the same path.

The system of claim 5, wherein the AP directly feeds the wireless local area network signal into the filtering combination module, and receives an uplink local area network signal from the filtering combination module; or, the AP first The WLAN signal is fed into a signal expansion box, which is then connected to the filter combination module via a cable, and receives an uplink LAN signal from the filter combination module along the same downlink path.

7. The system according to claim 5, wherein the AP directly feeds the wireless local area network signal to the filter combining module, the filter combining module comprising a connector N1, a connector N2, a connector N4, and a filter. B, the filter D and the combining component, the television signal is introduced through the connector N2 and sent to the filter B for filtering. The wireless local area network signal is introduced through the connector N1 and sent to the filter D for filtering, and the combining component receives the filter. The two output signals of B and filter D are mixed and transmitted to the cable splitter via connector N4; the wireless local area network signal is transmitted bidirectionally, and in the reverse direction, the connector is passed through the same path to the connector through the downlink N4. N1 is then transmitted to the AP.

The system of claim 5, wherein the AP first feeds the wireless local area network signal into a signal expansion box, and the signal expansion box is further connected to the filter combination module by a cable; the filter combination module includes Connector N1, connector N2, connector N4, filter B, filter D, combining component and branching component, the television signal is introduced through connector N2, sent to filter B for filtering, and the wireless local area network signal passes through connector N1. Introduced, sent to the filter D filter, the filtered wireless local area network signal and the television signal are mixed by a combined component and output to the cable splitter through the connector N4; at the same time, the one-way television signal is led out and connected through the branching component The uplink wireless local area network signal transmitted by the device N4 in the reverse direction of the downlink path is mixed in another combining component, output to the connector N1, and then extended by the cable and the signal as the feeding point. The showcase is delivered to the AP.

9. The system according to claim 8, wherein the signal expansion box for receiving the wireless local area network signal fed by the AP comprises a passive signal separator, a TV interface and a

a "T" type connector, the signal splitter separates the television signal from the wireless local area network signal and outputs the same to the TV interface and the "T" type connector, and the "T" type connector is respectively connected to the external antenna and At the antenna port of the AP.

10. The system according to claim 5, wherein the signal expansion box connected to the cable splitter comprises a passive signal separator, a TV interface and an antenna, the signal separator and the television signal and the wireless The LAN signals are separated and output to the TV interface and antenna respectively.

11. The system according to claim 10, wherein an active amplification module is further disposed between the signal separator and the antenna in the signal expansion box connected to the cable splitter, and the cable splitter There is also a power entity for receiving a DC feed, and the power entity is further provided with a capacitor, and the cable splitter is a DC-connectable cable splitter.

12. The system of claim 11 wherein: said active amplification module comprises two circulators for separating and isolating two-way transmit and receive signal transmissions, between the two circulators and/or Or an amplifier is disposed on the downlink; or the active amplification module includes a circulator and a dual-polarized antenna for performing isolation of the Han signal transmission between the circulator and the silent antenna An amplifier is placed on the upstream and/or downlink.

13. The system of claim 11 wherein the gain of the two amplifiers disposed between the two circulators or between the circulator and the dual polarized antenna is

5-18dB, and the gain of the amplifier on the uplink is greater than the gain of the amplifier on the downlink.

14. The system of claim 11 wherein said wireless local area network signal is in the 2.4 GHz Industrial, Scientific, and Medical (ISM) free frequency band.

15. A system for signal distribution using an indoor television cable, comprising an entry cable, a cable splitter, a drop cable, and a terminal signal box, further comprising a filter combination module, a wireless local area network access point AP, and an Ethernet Signal modem, where:

The filtering combination module receives a downlink wireless local area network signal input by the AP, a downlink Ethernet signal input by the Ethernet signal modem, and a television signal input by the home cable After completing the introduction, filtering and mixing of the three signals, the mixed signals are outputted together to the cable splitter, and then distributed by the cable splitter to each terminal signal box; the terminal signal box is a signal expansion box Separating the downlink LAN signal in the mixed signal to the antenna, outputting the TV signal to the TV interface, separating the downlink Ethernet signal to the Ethernet device interface or outputting to the TV interface together with the TV signal; the uplink Ethernet signal The terminal signal box is transmitted to the Ethernet signal modem via the same path, and the uplink wireless local area network signal is transmitted from the terminal signal box to the AP via the same path.

16. The system of claim 15, wherein the Ethernet signal modem is a home telephone line network HPNA modem, or a Multimedia Coax Alliance MoCA modem, and the HPNA signal is output to the filter combining module. Or MoCA signal.

The system according to claim 15, wherein the AP directly feeds the wireless local area network signal to the filter combining module, and the filter combining module comprises a connector N1, a connector N2, a connector N3, and a connection. The N4, the filter and the impedance transformer, the filter B, the filter D and the combining component, the Ethernet signal is introduced into the filter and the impedance converter through the connector N3, and the television signal is introduced through the connector N2 and sent to the filter B. The wireless local area network signal is introduced into the filter D through the connector N1, and the combining unit mixes the filter and the impedance converter, the Ethernet signal outputted by the filter B and the filter D, the television signal, and the wireless local area network signal. Directly transmitted to the cable splitter via connector N4, or first to another cable splitter via another filter C; the upstream Ethernet signal is routed along the same path through connector N4 in the filter combination module Upon reaching the connector N3, the uplink wireless local area network signal reaches the connector N1 along the same path downstream through the connector N4 in the filter combining module.

The system of claim 15, wherein the AP first feeds the wireless local area network signal into a signal expansion box, and the signal expansion box is further connected to the filtering combination module by a cable; the filtering combination module Including connector N1, connector N2, connector N3, connector N4, filter and impedance converter, filter B, filter D, branching component and combining component, Ethernet signal is introduced through connector N3 and then sent to filter And the impedance converter, the television signal is introduced into the filter B through the connector N2, and the wireless local area network signal is introduced into the filter D through the connector N1, and the filter and impedance converter, the filter B and the filter D are input. The outgoing Ethernet signal, the television signal, and the wireless local area network signal are mixed by a combined component, and then transmitted to the cable splitter through the connector N4; at the same time, the filter and the impedance converter, the Ethernet signal output by the filter B, and The television signal is also branched out by the splitter, and the uplink wireless local area network signal transmitted from the connector N4 in the reverse direction of the downlink path is mixed by another combining component, output to the connector N1, and then transmitted to the connector N1. The signal expansion box as the feed point; the uplink Ethernet signal is sent to the connector N3 along the same path of the downlink through the connector N4 in the filter combination module, and then transmitted to the Ethernet modem.

The system according to claim 15, wherein the signal expansion box connected to the cable splitter comprises a passive signal separator, a TV interface, an Ethernet device interface and an antenna, and the signal is separated. The device is configured to separate the television signal, the Ethernet signal and the wireless local area network signal, output the television signal to the TV interface, output the Ethernet signal to the Ethernet device interface, and output the wireless local area network signal to the antenna; or the signal separator Only the input signal is separated into a wireless local area network signal and a mixed signal of the television and the Ethernet, and the wireless local area network signal is output to the antenna, and the mixed signal of the television and the Ethernet is output to the TV interface.

The system according to claim 19, wherein an active amplification module is further disposed between the signal separator and the antenna in the signal expansion box connected to the cable branch, the cable splitter There is also a power entity for receiving a DC feed, and the power entity is further provided with a capacitor, and the cable splitter is a DC-connectable cable splitter.