CN202435501U - CATV access adapter - Google Patents

CATV access adapter Download PDF

Info

Publication number
CN202435501U
CN202435501U CN2011200368778U CN201120036877U CN202435501U CN 202435501 U CN202435501 U CN 202435501U CN 2011200368778 U CN2011200368778 U CN 2011200368778U CN 201120036877 U CN201120036877 U CN 201120036877U CN 202435501 U CN202435501 U CN 202435501U
Authority
CN
China
Prior art keywords
signal
moca
catv
combiner
couple
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011200368778U
Other languages
Chinese (zh)
Inventor
C·T·威尔斯
J·M·小埃根
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PPC Broadband Inc
Original Assignee
PPC Broadband Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US12/691,149 external-priority patent/US8510782B2/en
Application filed by PPC Broadband Inc filed Critical PPC Broadband Inc
Application granted granted Critical
Publication of CN202435501U publication Critical patent/CN202435501U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The utility model relates to a CATV (Cable Television) access adapter. The community visit or CATV access adapter is docked into a CATV network and used as a wire collector in a MoCA (Multimedia over Coaxial Alliance) network. An MoCA signal transmitted between active ports of the access adapter is suppressed by an MoCA frequency suppression filter, thereby avoiding interference of a function of an eMTA (Embedded Multimedia Terminal Adaptor) subscriber device connected to a passive port of the access adapter while not disturbing the transmission of active and passive signals between an upstream and a downstream of a CATV.

Description

The CATV couple in adapter
The cross reference of related application
The application is the part continuation application by identical inventor invention of description in the U.S. Patent Application Serial Number of submitting on October 21st, 2,008 12/255,008 that is entitled as " Multi-Port Entry Adapter; Hub and Method for Interfacing a CATV Network and a MoCA Network " of this paper.The invention of describing in the U.S. Patent Application Serial Number 12/255,008 is transferred assignee of the present invention.
Technical field
The present invention relates to that community inserts or cable television (cable television, CATV) network and relate to coaxial cable multimedia alliance (MoCA) (in-home) entertainment network of being in.More specifically; The present invention relates to a kind of new and improved CATV couple in adapter (entry adapter); It is in conduction CATV downstream and stream signal between subscriber device that is connected to couple in adapter and the catv network and be connected to conduction MoCA signal between (MoCA-enabled) device that the MoCA of couple in adapter enables, and prevents the correct function that the MoCA signal disturbs the embedded multimedia terminal adapter (eMTA) such as " liaison (the lifeline) " phone that also is connected to couple in adapter to install simultaneously.
Background technology
Catv network uses the infrastructure of coaxial cable, signal splitter and combiner, relay amplifier, filter, main line, cable breakout, branch line and other signal conduction devices of interconnection high frequency " downstream " signal to be provided and it is distributed to CATV subscriber's guard station (family and office) from the main signal dispensing mechanism that is called as " head end ".The subscriber device of downstream signal operation such as television set, telephone set and computer.In addition, most of catv network also sends back " upper reaches " signal the head end of catv network from subscriber device.For example, the subscriber uses STB to select to be presented at the program on the television set.As another example, when use was connected to the personal computer of public internet through CATV infrastructure, two-way communication was absolutely necessary.As another example, voice-over ip (VOIP) telephone set uses CATV infrastructure and public internet as the communication media that is used to transmit two way telephone conversation.
The interoperability of the outside equipment related with catv network infrastructure in transmission and subscriber device and subscriber guard station when allowing upstream and downstream CATV signal, downstream are limited in two different frequency bands with stream signal.In most of catv network, downstream frequency band is positioned at the scope of 54-1002 megahertz (MHz), and upstream frequency band is positioned at the scope of 5-42MHz.
Downstream signal is located to be delivered to the subscriber guard station from catv network infrastructure at CATV couple in adapter (it also is called as access device, terminal adapter or branch (drop) amplifier usually).Couple in adapter is a multi-port device, and it is connected at the access interface place from the CATV breakout cable of catv network infrastructure and its and is connected to coaxial cable in many other dispensing ports, and this coaxial cable extends through the subscriber guard station and arrives the cable outlet.Each cable outlet can be used for being connected to subscriber device.Typically, owing in different rooms, possibly use dissimilar subscriber devices, therefore most of family has the coaxial cable that extends to the cable outlet in each room almost.For example, in the many different room of family or office, use television set, computer and telephone set usually.A plurality of dispensing ports of couple in adapter are delivered to downstream signal each cable outlet and stream signal are transmitted to breakout cable and CATV infrastructure from subscriber device through couple in adapter.
Except that television set, computer and phone, can use a large amount of relatively other amusements and multimedia device in the family.For example, digital VTR (DVR) is used for broadcast program, still photo and mobile picture record at storage medium, thereby can be in this content of on display or television set, resetting of the later time that the user selects.As another example, also on display or television set, play computer game.This computer game can be those recreation that obtain at the medium that those recreation that obtain from catv network on the internet are perhaps play from the playback reproducer that is connected to display or television set.As another example, the receiver of the satellite broadcast signal that can distribute in the family is watched or is listened to being used to.The device of these types comprises the more traditional television set, telephone set and the device that are connected to the internet through catv network, is commonly referred to as multimedia device.
At home or a plurality of diverse locations in the subscriber guard station use the expectation of multimedia devices to cause the establishment of coaxial cable multimedia alliance (MoCA).MoCA has developed product specification with establishment be used to the to interconnect entertainment network of being in of the at present known and following multimedia device.The MoCA network of being in uses and to be initially dispensing CATV signal in the subscriber guard station and the subscriber guard station of setting up or the coaxial cable infrastructure of being in, mainly be because this coaxial cable infrastructure has been present in most of family and can CBR CATV frequency band in the much more information of loaded information.Through MoCA is enabled or the MoCA interface arrangement be connected the cable exit in the room of subscriber guard station, set up the MoCA network.These MoCA interface arrangements are realized MoCA communication protocol, and its signal that will be used by multimedia device usually is encapsulated in the MoCA signal packets and is being connected transmission MoCA signal packets between other MoCA interface arrangements in other cable exits subsequently.Receive the MoCA interface arrangement removes encapsulation from the MoCA signal packets multi-media signal; And multi-media signal is delivered to display, computer or other multimedia devices that connected, and content is presented to the user from said display, computer or other multimedia devices.
The device that each MoCA enables can be in or the MoCA network of subscriber guard station in the device that enables of each other MoCA communicate by letter with at home or send content of multimedia in the subscriber guard station everywhere.Can obtain can be at home from the content of multimedia of a multimedia device different position display, play or be used with other forms, and needn't be repositioned onto another position the subscriber guard station from a position at the multimedia device of physically will making a start.The aspect that more fully utilizes the multimedia device that exists in the Modern Family that is delivered in of content of multimedia is considered to be useful.Because the operation of the MoCA network of subscriber guard station must be carried out with the operation of CATV service simultaneously, therefore, the utilization of MoCA signal is different from the frequency range of the frequency range of CATV upstream and downstream signal.Typical MoCA frequency band is 1125-1525MHz.The so-called D frequency band of this MoCA signal is divided into eight different frequency range D1-D8, and the communication between the device that enables of these eight different D frequency ranges MoCA of being used to guarantee to select.For example; The D-1 frequency band that is in 1125-1175MHz can be used for and the MoCA interface arrangement of the associated with set-top box in the main room in house and be connected between another MoCA interface arrangement of the television set in the bedroom in house and transmit the CATV content of TV program, and the MoCA interface arrangement that is connected to the computer game multimedia device in the basement in house is delivered to another MoCA interface arrangement with the computer association of the playroom that is arranged in the house with contents of computer games being on the D-6 frequency band of 1375-1425MHz simultaneously.The MoCA frequency band also comprises other frequency ranges, but because the D frequency band is mainly used in the connection of setting up between the MoCA interface arrangement, so the D frequency band is main relevant (of major relevance).
Although the coaxial cable infrastructure of using the subscriber guard station has been simplified the realization of MoCA network significantly as communication media, do some shortcoming of existence like this.The MoCA signal has the ability of passing the CATV access device and getting into catv network infrastructure, and wherein these MoCA signals can pass breakout cable subsequently and get into another subscriber's guard station.The existence of adjoining the MoCA signal at place, subscriber guard station has damaged privacy and the fail safe of initial expection only for the information in original subscriber guard station.The possibility that also has the performance that influences the MoCA network in other subscriber guard stations unfriendly through the MoCA signal from original subscriber guard station of another subscriber guard station of catv network entering.Possibly cause that with MoCA signals from collision other subscriber guard stations the MoCA interface arrangement breaks down or operation improperly from original.
Catv network suffers the adverse effect from so-called intrusion noise, and this noise gets into catv network from the external source that is positioned at the subscriber guard station.The typical range of invading noise is in the frequency band of 0-15MHz, but also may reside in other upper reaches or downstream frequency.Intrusion noise alleviator has been used for controlling or reducing the intrusion noise from the subscriber guard station of 0-42MHz frequency band by exploitation, but the 1125-1525MHz signal in the MoCA frequency range obviously is in outside the scope of normal intrusion noise.Therefore, typically invade noise and control device for forbidding that the MoCA signal is invalid.
The outer MoCA signal of CATV signal band that resides in 5-42MHz and 54-1002MHz possibly constitute another noise source of catv network.Independent MoCA frequency inhibition (frequency rejection) filter is used for the outside by exploitation and is connected to the CATV couple in adapter, to make great efforts the keeping MoCA frequency signal to be restricted to the subscriber guard station.Yet the use of this device suffers undelegatedly to remove, distorts, the carelessness during original the installation, and possibly cause the physics of malfunctioning too early or fault to expose.
Initial expection is used to send the CATV signal because catv network is with the cable infrastructure of being in, and problem therefore also occurred.The cable infrastructure of typically being in uses signal splitter that single CATV downstream signal is divided into a plurality of CATV downstream signals and a plurality of CATV stream signal are combined as single CATV stream signal.The CATV couple in adapter is not that expection is used at it transmission MoCA signal between source port being arranged at first, and this is for realizing that in the MoCA network transmission of MoCA signal is necessary.In order to realize the MoCA network, the MoCA signal must pass through or " jump " between the signal component leg (leg) of the separation that is connected to a plurality of signal splitter/combiners that source port arranged.This signal passes through and is called as " splitter jump ".
Typical signal splitter has the signal suppressing or the isolation of height between the signal component leg of its separation.When jumping between the signal component leg of MoCA signal in the separation of splitter or passing through, the degree of signal suppressing or isolation greatly makes the strength retrogression of MoCA signal.The uncertain difference of cable infrastructure owing to be in, physics MoCA signal communication paths also is variable.MoCA communication protocol is discerned the possibility of variable intensity MoCA signal and the ability of the variable intensity of the MoCA signal of lifting MoCA signal strength signal intensity to compensate otherwise will between the device that MoCA enables, transmit is provided.
The intensity of MoCA signal or power can be far longer than the intensity or the power of the CATV signal that in the subscriber guard station, transmits.The MoCA signal of higher-wattage can be produced by following situation: the MoCA device compensates the signal strength signal intensity that reduces through intensity or the power that promotes the MoCA signal that is transmitted; Perhaps can be produced by following simple fact: than the obvious longer signal path that the CATV downstream signal passes through on catv network infrastructure, the MoCA signal passes through obviously shorter signal path in the MoCA of subscriber guard station network.Therefore, the MoCA signal has the ability of the correct function that influences the CATV subscriber device unfriendly.
An example from the remarkable adverse effect of MoCA signal appears in the CATV couple in adapter of following type: it has passive signal dispensing port and a plurality of active signal dispensing port.This CATV couple in adapter offers passive CATV downstream signal passive port and receives passive CATV stream signal from the eMTA device that is connected to passive port.The CATV couple in adapter also offers it with active C ATV downstream signal a plurality ofly to be had each in the source port and a plurality ofly has the source port each to receive active C ATV stream signal from it.This couple in adapter comprises splitter, and it is divided into passive signal and active signal with the CATV downstream signal.Passive signal was conducted through couple in adapter and without amplifying, regulate or revising before they are delivered to subscriber device from passive port.Active signal conduction usually passes through the forward path amplifier; Wherein amplifier with the CATV downstream signal from having before source port is delivered to active subscriber device; Intensity to these CATV downstream signals is amplified, and perhaps some characteristics of these CATV signals is made amendment or regulates.Most of subscriber device is benefited from the CATV downstream signal of amplification.Most of port on the CATV couple in adapter is that source port is arranged.Usually for each couple in adapter a passive port only is provided.The subscriber device that is connected to the passive port of couple in adapter is embedded multimedia terminal adapter (eMTA) device, typically is " liaison " telephone set.The eMTA device has made up cable modem and simulation telephony adapter.Cable modem be provided for to the data-interface that transmits internet protocol packets from catv network, and simulation telephony adapter provides the voice-over ip (VoIP) that is used for analog telephone interface.The eMTA device is changed at analog voice signal with between dividing into groups.The liaison phone is the well known example of eMTA device.
Conduction was not experienced amplification, adjusting or the modification the couple in adapter through the passive signal of couple in adapter at them before passive port is delivered to passive eMTA subscriber device.Usually, passive signal is expected at and keeps under the contingency condition can obtaining with useful.The function of liaison telephone set can not depend on amplifier or the correct function of other active signal adjusters in the passive signal path.Therefore, than at the power that is connected to the MoCA signal that transmits between the MoCA device that source port is arranged of couple in adapter, the passive CATV downstream signal that eMTA liaison telephone device receives has low relatively power.
Couple in adapter comprises: upper reaches band pass filter, the CATV stream signal in its conduction 5-42MHz frequency band; And the downstream band pass filter, the CATV downstream signal in its conduction 54-1002MHz frequency band.Although CATV upstream and downstream band pass filter expection is used for suppressing basically the signal outside the logical frequency of (reject) their band, the MoCA signal of the obvious higher-wattage in the 1125-1525MHz frequency band has the ability to see through typical C ATV upstream and downstream band pass filter to be enough to be equal to or to surpass (predominate) be delivered to the CATV downstream passive signal of eMTA subscriber device from passive port the intensity of intensity.The MoCA signal is a noise for the eMTA subscriber device, and the eMTA subscriber device can not turn round in response to the MoCA signal.Yet, to such an extent as to the intensity of MoCA signal can constitute so remarkable noise level uniform or excessively drive the eMTA device and disturb its function thus or make its function corrupt to the degree that can not realize reliable communication.For this reason, than the active and access interface of couple in adapter, the CATV couple in adapter that also is used as the part of MoCA network suffers for the MoCA Signal Spacing of passive port or the requirement that suppresses.At present, the passive port isolation of about 60dB is considered to hope.
Only about not being that the problem of correct function of eMTA subscriber device that power disturbance from the MoCA signal is connected to the passive port of CATV couple in adapter has appearred in subscriber device that MoCA enables.The subscriber device intended response that MoCA enables is in the MoCA signal operation, and the result, has the ability also in response to CATV downstream and stream signal operation the time, to suppress unwanted MoCA signal.At present, most of passive subscriber device is not that MoCA enables.Therefore, also in the MoCA of subscriber guard station network, conducting in the CATV couple in adapter of MoCA signal, the problem that the MoCA signal hinders the correct function of passive subscriber device is tangible.
Summary of the invention
The present invention relates to the CATV couple in adapter, it advantageously contributes to the be in foundation of network of MoCA under the situation that does not make the quality deterioration that offers eMTA subscriber device and signal that provides from the eMTA subscriber device and service.CATV couple in adapter of the present invention has been eliminated the disturbing effect of the MoCA signal of its passive port effectively, has avoided the MoCA signal to disturb the problem of the correct function of the eMTA subscriber device that is connected to passive port thus.When transmitting the hub of MoCA signal between the device that the CATV couple in adapter enables as the MoCA that source port is arranged that is being connected to couple in adapter, the present invention allows to use effectively the eMTA subscriber device that is not that MoCA enables.Therefore when setting up the MoCA network, the subscriber device that uses non-MoCA to enable effectively under the situation of extra cost can not brought to the subscriber in the subscriber guard station.This CATV couple in adapter has also strengthened the intensity of the MoCA signal that transmits in the MoCA network.
In order to realize these and other improvement, one aspect of the present invention relates to a kind of CATV couple in adapter, and it uses at place, subscriber guard station and has: access interface is used for transmitting downstream and stream signal with catv network; Passive port is used for transmitting downstream and stream signal with the eMTA subscriber device that is connected to said passive port; And a plurality of source port arranged; Be used for being connected to the said active subscriber device transmission of the CATV CATV upstream and downstream signal that source port is arranged; Said have source port also being connected between the subscriber device that the said MoCA that source port arranged enables in the MoCA network transmit the MoCA signal; Said CATV couple in adapter comprises: the first two-way splitter/combiner; It has common terminal; Said common terminal is connected to said access interface to transmit CATV downstream and stream signal with said catv network; Said first division device/combiner also has the signal component leg of first and second separation, and said first division device/combiner makes the CATV downstream signal be split into division CATV downstream signal and said division CATV downstream signal is offered the said first and second signal component legs, and said first division device/combiner is created single combination stream signal and said combination stream signal is offered said common terminal according to each stream signal that receives at the said first and second signal component leg places; The passive signal communication path, it conducts passive signal between extending with the said first signal component leg at said passive port and said first division device/combiner between the said first signal component leg of said first division device/combiner and the said passive port; Active signal communication path, its said secondary signal component leg from said first division device/combiner extend with conduction to be gone to and from the active signal of the said secondary signal component leg of said first division device/combiner; The second two-way splitter/combiner; It has common terminal and a plurality of signal component legs that separate; Each signal component leg has been connected to source port; Said second splitter/combiner makes each signal that receives at its common terminal place be split into heading signal and each heading signal is offered each signal component leg, and said second splitter/combiner also makes up active signal and said combination active signal is offered its common terminal according to each CATV stream signal that receives at each signal component leg place and MoCA signal creation; Second splitter/combiner, it carries out aforementioned signal division and signal combination to CATV downstream signal, CATV stream signal and MoCA signal; An and MoCA frequency rejects trap; It is connected between said active signal communication path and said second splitter/combiner, and a said MoCA frequency rejects trap suppresses to come the quite most power of the MoCA signal that the common terminal place of comfortable said second splitter/combiner exists and through being delivered to and transmitting the CATV upstream and downstream signal that source port is arranged from said.
According to an aspect of the present invention, a said MoCA frequency rejects trap makes the power reflection of the MoCA signal that the common terminal since said second splitter/combiner receives to be returned in the common terminal of said second splitter/combiner; And said second splitter/combiner will offer the signal component leg of said second splitter/combiner from the MoCA signal of said MoCA frequency rejects trap reflection as division reflection MoCA signal.
According to an aspect of the present invention, when being connected to when transmitting the MoCA signal between the subscriber device that the said said MoCA that source port arranged enables, the MoCA signal passes through between the signal component leg of said second splitter/combiner; Said second splitter/combiner will offer the signal component leg of said second splitter/combiner from the MoCA signal of said MoCA frequency rejects trap reflection as division reflection MoCA signal; And the power of said division reflection MoCA signal adds power at the MoCA signal that passes through between the signal component leg of said second splitter/combiner to strengthen the power of the MoCA signal that in said MoCA network, transmits.
According to an aspect of the present invention, MoCA signal passing through between the signal component leg of said second splitter/combiner makes the strength retrogression who passes through the obtainable MoCA signal of each signal component leg of said second splitter/combiner that obtains from said; And from decay said MoCA frequency rejects trap reflection and the MoCA signal is reflected in conduction less than the said division that is caused by passing through between each signal component leg of said second splitter/combiner through the decay of the MoCA signal of said second splitter/combiner.
According to an aspect of the present invention; Said CATV couple in adapter further comprises: the 2nd MoCA frequency rejects trap; It is connected in said passive signal communication path between the said first signal component leg and said passive port of said first division device/combiner; Said the 2nd MoCA frequency rejects trap prevents to arrive said passive port from the quite most power of the MoCA signal at the said first signal component leg place of said first division device/combiner, and said the 2nd MoCA frequency rejects trap is not having under the situation about decaying through being delivered to and transmitting from the CATV of said passive port upstream and downstream signal basically.
According to an aspect of the present invention, each in the said first and second MoCA frequency rejects traps has the ability that substantially the same being used to suppresses the MoCA signal.
According to an aspect of the present invention, each in the said first and second MoCA frequency rejects traps has the ability that is used to suppress the MoCA signal of 30dB at least.
According to an aspect of the present invention; Said CATV couple in adapter; Further comprise: the 3rd MoCA frequency rejects trap; It is connected between the common terminal and said access interface of said first division device/combiner; Said the 3rd MoCA frequency rejects trap prevents to get into said catv network from the quite most power of the MoCA signal of the common terminal place existence of said first division device/combiner; And prevent from the very most power of any MoCA signal that exists on the said catv network through said couple in adapter arrive said passive with source port is arranged, and not have basically under the situation about decaying through being delivered to and transmitting from the CATV of said access interface upstream and downstream signal.
According to an aspect of the present invention, said first, second with the 3rd MoCA frequency rejects trap in each have the ability that substantially the same being used to suppresses the MoCA signal.
According to an aspect of the present invention, each in the said first and second MoCA frequency rejects traps has the ability that is used to suppress the MoCA signal of 30dB at least.
According to an aspect of the present invention, said CATV couple in adapter further comprises: housing; And wherein said access interface, said passive port saidly has source port to be connected to said housing with all; Each port section ground is formed by wire and cable connector; And the said first and second two-way splitter/couplers, said passive and active signal communication path and the said first and second and the 3rd MoCA frequency rejects trap are positioned at said housing.
According to an aspect of the present invention; Said CATV couple in adapter further comprises: other a MoCA frequency rejects trap; It is connected between the common terminal and said access interface of said first division device/combiner; Said other MoCA frequency rejects traps prevent to get into said catv network from the quite most power of the MoCA signal of the common terminal place existence of said first division device/combiner; And prevent from the very most power of any MoCA signal that exists on the said catv network through said couple in adapter arrive said passive with source port is arranged, and not have basically under the situation about decaying through being delivered to and transmitting from the CATV of said access interface upstream and downstream signal.
According to an aspect of the present invention, said active signal communication path comprises active downstream signal communication path of CATV and the active stream signal communication path of CATV; The active downstream signal communication path of said CATV comprises at least one active electronic component, and it need provide electrical power to be delivered to the said CATV downstream signal that source port is arranged to be used to regulate from said access interface through the active downstream signal communication path of said CATV; The active downstream signal communication path of said CATV is through the CATV downstream signal in the predetermined C ATV downstream frequency band and suppress all downstream signals of other frequencies basically; The active stream signal communication path of said CATV is delivered to said catv network with the CATV stream signal from the subscriber device that is connected said active port; The active stream signal communication path of said CATV is through the CATV stream signal in the predetermined C ATV upstream frequency band and suppress all stream signal of other frequencies basically; And said CATV passive signal communication path and said the 2nd MoCA frequency rejects trap all do not have and need provide electrical power to be used to influence the passive downstream of CATV of between said access interface and said passive port, transmitting and the active electronic component of stream signal.
According to an aspect of the present invention, the needs of the active downstream signal communication path of said CATV provide an active electronic component of electrical power to comprise signal amplifier.
According to an aspect of the present invention, the active stream signal communication path of said CATV comprises that invading noise alleviates circuit, and it is controlled from said in operation has the upper reaches of source port to invade noise.
Another aspect of the present invention relates to a kind of CATV couple in adapter, and it has and is used for transmitting the access interface of CATV downstream and stream signal and having with catv network being used for to the subscriber device transmission CATV downstream at place, subscriber guard station and passive dispensing port and a plurality of active dispensing port of stream signal.Passive port is suitable for being connected to the eMTA subscriber device.There is source port to be suitable for being connected to the subscriber device that the MoCA in the MoCA network at CATV subscriber device and place, subscriber guard station enables.These are a plurality of to have between the source port subscriber device that also MoCA that is connected to source port in the MoCA of subscriber guard station network enables and transmits the MoCA signal.The first two-way splitter/combiner of couple in adapter has common terminal, and it is connected to access interface to transmit CATV downstream and stream signal with catv network.First division device/combiner also has the signal component leg of first and second separation.First division device/combiner makes the CATV downstream signal be split into division CATV downstream signal and each division CATV downstream signal is offered the first and second signal component legs.First division device/combiner is created single combination stream signal and should be made up stream signal according to each stream signal that receives at the first and second signal component leg places and offers common terminal.The passive signal communication path extends between the first signal component leg of first division device/combiner and passive port.The passive signal communication path conducts passive signal between the first signal component leg of passive port and first division device/combiner.The active signal communication path extends with conduction from the secondary signal component leg of first division device/combiner to be gone to and from the active signal of the secondary signal component leg of first division device/combiner.The second two-way splitter/combiner has common terminal and a plurality of signal component legs that separate.Each signal component leg has been connected to source port.Second splitter/combiner makes each signal that receives at its common terminal place be split into heading signal and each heading signal is offered each signal component leg.Second splitter/combiner also makes up active signal and should make up active signal according to each CATV stream signal that receives at each signal component leg place and MoCA signal creation and offers its common terminal.Second splitter/combiner is carried out signal division and signal combination to CATV downstream signal, CATV stream signal and MoCA signal.The one MoCA frequency rejects trap is connected between the active signal communication path and second splitter/combiner.The one MoCA frequency rejects trap suppress the quite most power of the MoCA signal that the common terminal place of comfortable second splitter/combiner exists and under the situation that not have decay basically through being delivered to and transmitting the CATV upstream and downstream signal of having source port by oneself.
An additional aspect of CATV couple in adapter relates to a MoCA frequency rejects trap; It makes the common terminal that returns second splitter/combiner since the power reflection of the MoCA signal of the common terminal reception of second splitter/combiner; And second splitter/combiner will reflect the signal component leg that the MoCA signal offers second splitter/combiner as division from the MoCA signal of MoCA frequency rejects trap reflection, increase efficient and power that the MoCA signal dispensing between the source port is arranged at couple in adapter thus.The MoCA signal interpolation power that the MoCA signal that is reflected passes through between the signal component leg at signal splitter/combiner or jumps.
Another additional aspect of CATV couple in adapter relates to the 2nd MoCA frequency rejects trap, and it is connected in the first signal component leg and the passive signal communication path between the passive port of first division device/combiner.The 2nd MoCA frequency rejects trap suppresses the quite most power of the MoCA signal that the first signal component leg place from first division device/combiner exists, and eliminates thus or reduce the MoCA signal influence and the maintenance of the eMTA subscriber device that is connected to passive port is delivered to and transmits from the CATV upstream and downstream quality of signals that is connected to the eMTA subscriber device of passive port.
The another additional aspect of CATV couple in adapter relates to the 3rd MoCA frequency rejects trap, and it is connected between the common terminal and access interface of first division device/combiner.The 3rd MoCA frequency rejects trap suppresses from the quite most power of the MoCA signal of the common terminal place existence of first division device/combiner and is not having basically under the situation about decaying through being delivered to and transmitting from the CATV of access interface upstream and downstream signal.The conduction of the MoCA signal on the 3rd MoCA signal frequency rejects trap hinders from the MoCA network of subscriber guard station to catv network and hinder the conduction of the false MoCA signal the MoCA network from catv network to the subscriber guard station.
Another aspect of the present invention relates to a kind of method, and it prevents that the MoCA signal that transmits between the subscriber device that the MoCA that is connected to the CATV couple in adapter in the MoCA network enables from disturbing the communication from the eMTA subscriber device that connects through the CATV couple in adapter to catv network.This method comprises: the passive port that the eMTA subscriber device is connected to couple in adapter; Between catv network and eMTA subscriber device, transmit passive CATV downstream and stream signal through couple in adapter and passive port; The subscriber device that each MoCA is enabled is connected to a plurality of of having in the source port of couple in adapter; Between the subscriber device that MoCA in the MoCA network enables through couple in adapter with have source port to transmit the MoCA signal; In couple in adapter, make the CATV downstream signal that receives from catv network be split into division CATV downstream signal and a division CATV downstream signal is offered passive port and other divisions CATV downstream signal has been offered source port; In couple in adapter, will be combined as CATV combination stream signal and this CATV combination stream signal will be offered catv network from couple in adapter from passive port and the CATV stream signal that has source port to receive; In couple in adapter, will be the combination active signal from CATV stream signal and the MoCA signal combination that has source port to receive; Offer a MoCA frequency rejects trap in the couple in adapter and suppress quite most power through making up active signal, and under the situation that not have decay basically, make CATV downstream and stream signal in the combination active signal pass through a MoCA frequency rejects trap from the MoCA signal in the combination active signal.
An additional aspect of this method relates to, and makes from the division of a MoCA frequency rejects trap to reflect the MoCA signal reflex to source port is arranged.The power of division reflection MoCA signal and be added in together to strengthen from there being source port to be transmitted to the power of the MoCA signal of the subscriber device that the MoCA the MoCA network of subscriber guard station enables at the power that the MoCA signal that passes through between the source port is arranged.
Another additional aspect of this method relates to; Offer the 2nd MoCA frequency rejects trap in the couple in adapter through making up active signal; Inhibition from otherwise be transmitted to the quite most power of any MoCA signal of the combination active signal of passive port, and under the situation that is not having decay basically, make the CATV downstream that utilize the dead terminal oral instructions to pass pass through the 2nd MoCA frequency rejects trap with stream signal.
Another additional aspect of the present invention relates to; Be not delivered to and transmit under the situation of the CATV of couple in adapter upstream and downstream signal attenuation not making basically; Utilize the 3rd MoCA frequency rejects trap in the couple in adapter, suppress from otherwise will be transmitted to catv network and otherwise will be transmitted to the quite most power of the MoCA signal the couple in adapter from couple in adapter from catv network.
Accompanying drawing through combining the hereinafter summary is with reference to the detailed description of following presently preferred embodiment, and with reference to accompanying claims, can more intactly be familiar with the present invention, and can obtain the present invention and realize above and other improved modes.
Description of drawings
Fig. 1 is the block diagram that diagram merges a plurality of CATV couple in adapters of the present invention, and some adapters are shown as the MoCA that is positioned at the subscriber guard station network of being in is interconnected with catv network.
Fig. 2 is the vague generalization perspective view of a CATV couple in adapter shown in the Fig. 1 in the subscriber guard station, and this CATV couple in adapter is connected to the MoCA network and is connected to the active and passive subscriber device shown in the block diagram form.
Fig. 3 is the block diagram of the functional part of the CATV couple in adapter shown in Fig. 2, and this CATV couple in adapter is shown as and is connected to catv network, is connected to passive subscriber device, and the active subscriber device that is connected to the node that forms the MoCA network.
Embodiment
Usually show among Fig. 1 and merge community of the present invention access TV or cable television (CATV) couple in adapter 10.CATV couple in adapter 10 be arranged in the CATV subscriber 12 places, guard station or CATV subscriber guard station 12 and form the be in part of entertainment network 14 of traditional M oCA.Multimedia device 16 is through 14 interconnection of the MoCA network in the subscriber guard station 12.Multimedia device 16 uses MoCA network 14 transmitting content of multimedia or MoCA signal each other.MoCA network 14 is partly formed by the coaxial cable infrastructure that is pre-existing in that exists in the subscriber guard station 12 (generally by coaxial cable 18 expressions).The example of multimedia device 16 is digital VTR, computer, data modem unit, computer game, television set, TV set-top box and other audio frequency and vision entertainment device.Usually, multimedia device 16 constitutes active subscriber device.
CATV couple in adapter 10 also is the part of traditional catv network 20.The CATV couple in adapter with in the CATV perhaps signal be delivered to the subscriber device of subscriber guard station 12 from catv network 20.Except that multimedia device 16, subscriber device can also comprise other devices that do not turn round but the expection conduct is connected to the result of catv network 20 as the part operation of MoCA network 14.Usually are not eMTA devices 21 as the example of the subscriber device of the part of MoCA network 14, it is by voice modem 46 and the telephone set that is connected 48 illustrations.
CATV couple in adapter 10 has useful characteristic, said characteristic allow its in MoCA network 14 and in catv network 20 simultaneously by a plurality of roles' runnings, be of value to thus MoCA network 14 and catv network 20 the two.CATV couple in adapter 10 is as the hub in the MoCA network 14, between multimedia device 16, to transmit effectively or dispensing MoCA signal.CATV couple in adapter 10 also turns round by traditional role as catv network 20 and the interface between the subscriber device at place, subscriber guard station, is convenient to the CATV service to the subscriber thus.In addition; CATV couple in adapter 10 prevents from the MoCA signal interference of MoCA network 14 and the function and the performance of deterioration eMTA device 21 effectively; Be connected to couple in adapter 10 and mutual even guarantee MoCA network 14 thus, will keep the expectation function of the eMTA device that is connected with it.Hereinafter has been described these and other improvement and function in more detail.
Catv network 20 shown in Fig. 1 has typical topology.Downstream signal 22 rises from the program source at head end 24 places of catv network 20, and in the continuous path through trunk cable 26, signal splitter/combiner 28, submain cable 30, another signal splitter/combiner 32, distribution cable coupling box (distribution cable branch) 34, cable breakout 36 and breakout cable 38, is transmitted to CATV couple in adapter 10.Stream signal 40 is delivered to catv network 20 from CATV couple in adapter 10, and is transmitted to head end 24 by opposite order.Traditional relay amplifier 42 is dispersed in the suitable position in the topology of catv network 20, and it amplifies downstream signal 22 and stream signal 40.Traditional relay amplifier also can be included in the cable breakout 36.Cable breakout 36 and signal splitter/combiner 28 are divided into a plurality of downstream signals that separate with 32 with single downstream signal, and a plurality of stream signal are combined as single stream signal.
CATV couple in adapter 10 receives downstream signals 22 in catv network connection or access interface 44 places from catv network 20.Passive downstream signal is transmitted to eMTA device 21 through CATV couple in adapter 10 and regulates without amplification, enhancing, modification or other essence.Passive downstream signal is delivered to passive subscriber device from passive port 45, the eMTA device of promptly being represented by the voice modem that is connected to telephone set 48 46 21.Active downstream signal by the active electronic circuit block (such as amplifier) of the consumed power in the CATV couple in adapter 10 for example amplify, the adjusting of filtering, modification, enhancing or other modes.Active downstream signal is divided into a plurality of duplicates, and has in the source port (be labeled as 49 jointly, but in Fig. 2, be labeled as 50,52,54 and 56 separately) each to send duplicate from a plurality of.Active downstream signal is delivered to the active subscriber device that is positioned at 12 places, subscriber guard station.
Typically, active subscriber device will be as the part of MoCA network 14 and the multimedia device 16 that connects.Yet active subscriber's device needs not to be that MoCA enables.The example of active subscriber's device that non-MoCA enables is the television set that source port is arranged that under the situation of not using the MoCA interface, is directly connected to the CATV couple in adapter.In this example, the television set that enables of non-MoCA will not be the part of MoCA network 14.
The CATV subscriber device typically generates stream signal 40 (Fig. 2) and they is delivered to CATV couple in adapter 10 with for delivery to catv network 20.Stream signal 40 can be the passive stream signal that eMTA device 21 generates, perhaps stream signal 40 can be by as be connected to the illustrative active subscriber device of STB (all not shown) of television set or the active stream signal that multimedia device 16 generates.STB allows subscriber/beholder to carry out program and watches selection.
More details about the CATV access device have been shown among Fig. 2.CATV couple in adapter 10 comprises housing 58, and it seals internal electronics parts (shown in Fig. 3).Mounting flange 60 allows CATV couple in adapter 10 is attached to the supporting construction at place, subscriber guard station around the hole 62 in housing 58 and the flange 60.The electrical power that is used for the active parts of CATV couple in adapter 10 provides from the traditional DC power supply 66 that is connected to special power input port 68.As an alternative, electrical power can provide through one the traditional power inserter (not shown) that is connected in source port 50,52,54 or 56.The power inserter allows to conduct the DC power of relative low-voltage through the identical source port that has that also conducts high-frequency signal.Use traditional power inserter to have eliminated needs to separate private power port 68, perhaps provide can also through its apply electrical power for selecting port.Power supply 66 or the power that provides from the power inserter typically derive from the traditional wall outlet (not shown) the subscriber guard station.The catv network that catv network 20 is connected to CATV couple in adapter 10 connects access interface 44.
Port 44,45,50,52,54,56 and 68 is all preferably formed by traditional female coaxial cable connector, the internal part that it is mechanically connected to housing 58 and is connected electrically to CATV couple in adapter 10.Coaxial cable 18 from subscriber guard station cable infrastructure is connected to CATV couple in adapter 10 with breakout cable 38 (Fig. 1) through the public coaxial cable connector of the corresponding cooperation (not shown) on these coaxial cables being mechanically connected to the female coaxial cable connector that forms port 44,45,50,52,54,56 and 68.
Settle a CATV couple in adapter 10 at each place, subscriber guard station.Active and passive port 45,50,52,54 and 56 quantity are by the quantity decision of the coaxial cable 18 that spreads all over subscriber guard station cabling.Although the CATV couple in adapter 10 shown in Fig. 2 comprises seven ports, other couple in adapters can have the greater or lesser port of quantity.The quantity of the coaxial cable 18 in the subscriber guard station and cabling have constituted the cable infrastructure by being in of using of MoCA network 14 (Fig. 1) or subscriber guard station.
Because CATV service provider provides the CATV couple in adapter 10 that is used by each CATV subscriber, therefore advantageously, the quantity of the difference configuration of the CATV couple in adapter that the minimizing subscriber possibly need.Except that other, doing like this provides the mass-produced economical efficiency of scale, has reduced the chance of setup error, cable infrastructure that the permission subscriber expands and change is in, and reduced cost of inventory.In CATV couple in adapter 10, incorporating function into has also promoted the economical efficiency of scale, mistake minimizing, extended capability, multifunctionality and cost of inventory to reduce so that the ability as the hub in the MoCA network 14 (Fig. 1) to be provided to it.The improvement that utilizes hereinafter to describe, CATV couple in adapter 10 allow effectively to use the eMTA device 21 and multimedia device 16 that in MoCA network 14, connects, and can deterioration or the expectation function of the eMTA device 21 that infringement connected.
Each coaxial cable 18 of the cable infrastructure of being in terminates at cable and exports 70 places.Those current untapped coaxial cables 18 preferably export the suitable termination resistor (not shown) termination at 70 places with the cable that is positioned at these coaxial cables 18.Yet, in most of situation, the MoCA interface arrangement 72 that the multimedia device 16 that the cable of coaxial cable 72 outlet 70 is connected to separation is connected.
Each MoCA interface arrangement 72 is traditional and comprises the controller (not shown) that this controller is programmed to have the necessary function that is used to realize MoCA communication protocol.Each MoCA interface arrangement 72 is connected between cable outlet 70 and the multimedia device 16.When multimedia device 16 is created the output signal; These output signals are packed or otherwise be included in the MoCA signal that MoCA interface arrangement 72 creates; And these MoCA signals are by a MoCA interface arrangement 72 coaxial cable 18 through family's cable infrastructure subsequently, are sent in the MoCA network 14 at place, subscriber guard station another through the CATV couple in adapter 10 as the MoCA hub and receive MoCA interface arrangement 72.Receive MoCA interface arrangement 72 and extract initial encapsulation or otherwise be included in the original output signal in the MoCA signal, and receive MoCA interface arrangement 72 with these original output signals offer receive MoCA interface arrangement 72 attached multimedia device 16.Receive MoCA interface arrangement 72 and can supervisory signal be sent it back original transmitted MoCA interface arrangement 72 with the reception of confirming the MoCA signal and the information such as signal strength signal intensity is provided in addition.Through this mode, comprise from the MoCA signal of the content of multimedia of a multimedia device 16 and be delivered to multimedia device 16 that another MoCA enables to use in its position through MoCA network 14 (Fig. 1).Turn round through this mode, and aspect the conventional term of in network field, using, MoCA interface arrangement 72 and multimedia device 16 have formed a node 74 of MoCA network 14.The MoCA signal transmits between the different MoCA node 74 of MoCA network 14 by described mode.
Separate although MoCA interface arrangement 72 is shown as with multimedia device 16, each MoCA interface arrangement 72 typically is incorporated in the multimedia device 16 that each MoCA enables or as its integral part.Yet for those multimedia devices 16 that does not comprise built-in MoCA interface arrangement 72, the device 72 that isolated M oCA enables is connected to multimedia device 16 and participates in MoCA network 14 to allow it thus as node.
The internal functional unit of CATV couple in adapter 10 has been shown among Fig. 3.These internal circuit components comprise first traditional double to signal splitter/combiner 76, the downstream signal 22 from catv network 20 that its division receives at the common terminal place from access interface 44.Downstream signal 22 is split at the passive CATV downstream signal 78 at signal component leg 77 places of a separation and is split into the active C ATV downstream signal 80 at signal component leg 81 places of another separation.
Passive downstream signal 78 is directly transferred to passive port 45 and is transmitted to eMTA device 21 through passive port 45 in passive signal communication path 79.Passive stream signal 82 is created by eMTA device 21 and is transmitted to signal splitter/combiner 76 to become the stream signal 40 in the catv network 20 through passive port 45 through passive signal communication path 79.The passive signal communication path 79 that is used for passive signal in the CATV couple in adapter 10 does not comprise the active electronic component of the consumed power of possible malfunctioning or fault, strengthens the reliability of CATV passive communication thus.Because it is using in urgent and critical situation, thus passive signal communication path 79 to be intended to be reliable as far as possible.Voice modem 46 is an example of eMTA device 21 with " liaison " telephonic communication capability that telephone set 48 (Fig. 1) is set up.
Active C ATV downstream signal 80 from the signal component leg 81 of other separation of splitter/combiner 76 is transmitted to a CATV downstream frequency bandpass filter 84 in active downstream signal communication path 85.Downstream filters 84 is through having the signal of the frequency in the frequency range of the CATV downstream of 54-1002MHz, and suppresses signal with the frequency in other scopes.The downstream signal that filter 84 passes through is amplified by amplifier 86 and is provided for the 2nd CATV downstream frequency bandpass filter 88 subsequently, and both also are the parts of active downstream signal communication path 85 these.
Active C ATV downstream signal through amplification and further filtering is transmitted to the MoCA frequency rejects trap 90 with conventional construction subsequently.The function of MoCA frequency rejects trap 90 is to suppress these signals through signal among the MoCA frequency range 1125-1525MHz can not be conducted through filter 90.Signal in the frequency range of MoCA frequency band 1125-1525MHz outside is through MoCA frequency rejects trap 90.The CATV downstream signal is at 54-1002
In the MHz frequency range, so MoCA frequency rejects trap 90 is easily through the CATV downstream signal.
After passing through MoCA frequency rejects trap 90, the CATV downstream signal in the frequency range of 54-1002MHz is applied to the common terminal of second traditional double to splitter/combiner 94.Splitter/combiner 94 is with the division of these signals or be divided into four identical downstream signals, each identical downstream signal have the downstream signal that is applied to splitter/combiner 94 at first power or signal strength signal intensity roughly 1/4th.Each heading signal is sent by one from the signal component leg 91,92,93 and 95 of four separation of splitter/combiner 94.From what four heading signals of the signal component leg 91,92,93 of splitter/ combiner 94 and 95 were applied to CATV couple in adapter 10 respectively source port 50,52,54 and 56 places are arranged.Although show four source port 50,52,54 and 56 is arranged; But the splitter/combiner that has the signal component leg of varying number through use; Perhaps through using the splitter/combiner of a plurality of cascades; Realized more having source port, the heading signal of the desired amt of source port has been arranged with all that obtain being applied to couple in adapter 10.
In response to regard to the degree that the obtainable CATV downstream signal of source port 50,52,54 and 56 places is arranged, each MoCA interface arrangement 72 is directly delivered to multimedia device 16 with these downstream signals with regard to the multimedia device 16 that is connected to source port through coaxial cable 18.The CATV downstream signal that MoCA interface arrangement 72 is not revised or otherwise influence is passed through it.Can send in the situation of CATV stream signal 96 at those multimedia devices 16, those CATV stream signal 96 are passed MoCA interface arrangement 72 equally and are not changed or influence and subsequently through cable outlet 70, coaxial cable 18 and there is source port 50,52,54 or 56 to be transmitted to splitter/combiner 94.Splitter/combiner 94 makes up all CATV stream signal 96 and these signals is offered MoCA frequency rejects trap 90 as the active stream signal 96 of combination.Because CATV stream signal 96 is in the frequency band of 5-42MHz and outside the MoCA of 1125-1525MHz frequency band, thus CATV stream signal 96 by MoCA frequency rejects trap 90 passed upstream in active signal communication path 99.
Be provided for a CATV upstream frequencies band pass filter 98 of active stream signal communication path 99 from the active stream signal 96 of the combination of MoCA frequency rejects trap 90.Filter 98 is through having the signal of the frequency in the CATV of 5-42MHz upstream frequencies scope, and suppresses signal with the frequency in other scopes.The CATV stream signal that filter 96 passes through is provided for the intrusion noise subsequently and alleviates circuit 100.The intrusion noise alleviates circuit 100 and controls the intrusion noise in the 0-42MHz scope of the noise source that possibly rise in the subscriber guard station.The use that the intrusion noise alleviates circuit 100 is optional in CATV couple in adapter 10; If but use; Then preferably use and have the U.S. Patent application of submitting on October 13rd, 2,008 12/250 that is entitled as " Ingress Noise Inhibiting Network Interface Device and Method for Cable Television Networks "; The noise of the form of describing in 227 alleviates circuit 100, and this application is transferred the possession of in assignee of the present invention.
Leave and invade the CATV stream signal that noise alleviates circuit 100 and be applied to the 2nd CATV upstream frequencies band pass filter 102 subsequently.The 2nd CATV upstream frequencies band pass filter 102 also is optional use.If first upper reaches band pass filter 98 provides enough frequency filtering features and use the intrusion noise to alleviate circuit 100, then second upper reaches band pass filter 102 can be optional.In some cases, or even use to invade noise when alleviating circuit 100, can also eliminate second upper reaches band pass filter 102.The intrusion noise alleviates circuit 100 and the 2nd CATV upper reaches band pass filter 102 also is the part of active stream signal communication path 99.
Be provided for the signal component leg 81 of splitter/combiner 76 from the active stream signal of active stream signal communication path 99.Be provided for the signal component leg 77 of splitter/combiner 76 from the passive stream signal 82 of passive signal communication path 79.The signal that splitter/combiner 76 combinations offer its signal component leg 77 and 81 is to form single combination stream signal 40.
As shown in Figure 3, MoCA network 14 is present in has between source port 50,52,54 and 56 and has passed source port 50,52,54 and 56.Ideally, the MoCA signal in the MoCA network 14 should be restricted to through cable outlet 70, coaxial cable 18, have source port 50,52,54 and 56 and the MoCA interface arrangement 72 of splitter/combiner 94 between the path.When MoCA frequency rejects trap 90 has all power basically or the intensity of the MoCA signal that enough sizes and ability exist with the common terminal place that controls and suppress splitter/combiner 94 effectively, the MoCA signal will be limited with this ideal style.Yet; The capable MoCA frequency rejects trap 90 of controlling and suppress all power basically of MoCA signal effectively is expensive relatively; The parts that the needs manufacturing is a large amount of; Make it make difficulty and expensive more thus, and will need significantly bigger manufacturing to make great efforts to carry out tuningly to realize effective MoCA frequency inhibition with the bandpass characteristics that combines to set up CATV downstream and upper reaches filter 84,88,98 and 102.Filter 90,84,88,98 in the single couple in adapter 10 and 102 relevant nature make the proper operation of each filter depend on the proper operation of every other filter.Therefore all filters are carried out tuning become expensive, that repeat and iteration behavior consuming time.
Usually; Under the situation that the essence that does not have 90 pairs of MoCA signals of MoCA frequency rejects trap suppresses, the MoCA signal with intensity of the correct function that is enough to influence unfriendly eMTA device 21 can see through or otherwise propagate through the circuit of active communication path 85 and 99 and mutual with the passive CATV upstream and downstream signal 82 and 78 in the passive communication path 79.The intensity of the MoCA signal of propagating with this mode possibly be enough to destroy the information that comprises in passive CATV signal 78 and 82, and infringement or hinder the correct function of eMTA device 21 thus.The intensity of the MoCA signal of propagating with this mode also possibly be enough to subdue some reflector and the receiver in the eMTA device 21, the correct function that this also will damage or hold it back.
If in couple in adapter 10, only utilize single MoCA frequency rejects trap 90, then this single MoCA frequency rejects trap 90 must have the MoCA signal that suppresses in the couple in adapter 10 or it is arrived the outstanding ability of MoCA network 14 with the CATV Signal Spacing and with the MoCA signal limitations.At present, the minimum isolation ability that expection will about 60dB prevents that the MoCA frequency signal from influencing the correct function of eMTA device 21 unfriendly.The single MoCA frequency rejects trap that manufacturing has a 60dB isolating power is complicated, expensive with consuming time.Need a large amount of relatively parts to create rejects trap with this ability.These parts must be assembled and in following situation, be carried out tuning subsequently: in this situation to the tuning tuning influence that will receive CATV band pass filter 84,88,98 and 102 usually of MoCA frequency rejects trap.For fear of cost and the complexity made with the single MoCA frequency rejects trap 90 of tuning ability with the signal communication paths 85 that is enough to suppress all MoCA signals and prevents their entering couple in adapters and 99, one or more additional MoCA frequency rejects traps 104 and 108 are incorporated in the couple in adapter 10.In this situation, do not need MoCA frequency rejects trap 90 to suppress the whole intensity of MoCA signal, but it change the ability with the very most intensity that is enough to suppress the MoCA signal into.Suppress the remainder of MoCA signal strength signal intensity by one in the additional MoCA frequency rejects trap 104 and 108 or both.
The 2nd MoCA frequency rejects trap 104 is connected in the passive communication path 79.The 2nd MoCA frequency rejects trap 104 suppresses to be delivered to the remaining MoCA signal in active downstream and upstream communication path 85 and 99 through a MoCA frequency rejects trap 90.Therefore, because the MoCA frequency of the 2nd MoCA frequency rejects trap 104 suppresses ability, prevented that remaining MoCA signal and eMTA device 21 are mutual.The passive stream signal that the 2nd MoCA frequency rejects trap 104 does not influence the passive downstream signal that offers eMTA device 21 or provides from the eMTA device is because the inhibition ability of second rejects trap 104 only is applied to the frequency range that signal and the passive downstream of CATV and stream signal in the 1125-1525MHz scope occupy diverse 5-42MHz and 52-1002MHz.
The 3rd MoCA frequency rejects trap 108 is connected between the common terminal and catv network access interface 44 of splitter/combiner 76.The 3rd MoCA frequency rejects trap 108 suppresses to see through a MoCA frequency rejects trap 90, active signal communication path 85 and 99 and the remaining MoCA signal of splitter/combiner 76, prevents that thus these remaining MoCA signals from arriving catv network 20.Under the situation that does not have MoCA rejects trap 108; Like what understand according to Fig. 1; Remaining MoCA signal from a CATV couple in adapter 10 can pass through breakout cable 38 arrival cable breakout 36, and arrives another CATV couple in adapter 10 of different CATV subscribers through another breakout cable 38 of this cable breakout 36 from cable breakout.Prevent that remaining MoCA signal from arriving the privacy of the communication of adjacent subscriber guard station in the original CATV subscriber's of protection MoCA network 14 and preventing to disturb the correct function aspects of different CATV subscribers' MoCA network is important.From similar viewpoint, the 3rd MoCA rejects trap 108 also prevents to get into CATV couple in adapter 10 at access interface 44 places and contribute producing about the problem of going to and communicate by letter from the correct passive signal of eMTA device 21 from the remaining MoCA signal that exists on the catv network 20 of another CATV subscriber's MoCA network.Therefore, the 3rd MoCA frequency rejects trap 108 prevents that the MoCA signal from escaping into catv network 20 and preventing that the MoCA signal that catv network 20 exists from getting into couple in adapter 10 from couple in adapter 10.
Through between a plurality of MoCA frequency rejects traps 90,104 and 108, dividing MoCA frequency inhibit feature, each MoCA frequency rejects trap can have less ability.It is not too high and not too complicated that this less ability makes MoCA frequency rejects trap manufacture cost.The inhibition ability that reduces is not many to relate to mutual with the CATV band pass filter, reduces thus and can carry out tuning difficulty by force filter to less.The MoCA frequency rejects trap of less ability needs less parts and less manufacturing effort.Usually, between a plurality of MoCA frequency rejects traps, dividing MoCA frequency inhibit feature has simplified manufacturing and has realized identical or better MoCA frequency rejection than the MoCA frequency rejection that is obtained by more complicated single MoCA rejects trap 90.
Preferably, the combination of MoCA frequency rejects trap has realized passive port 45 and access interface 44 and the isolation that the 60dB at least between any one in source port 50,52,54 and 56 is arranged.Size through confirming MoCA frequency rejects trap 90,104 and 108 has realized the isolation of this degree to realize the Signal Spacing of desired 60dB.Because the effect of a plurality of filters is additivitys, method for optimizing is to confirm that each size of three MoCA frequency rejects traps 90,104 and 108 is to have the isolation of 30dB at least separately.
Except suppressing the benefit of the MoCA signal in the CATV signal path, MoCA frequency rejects trap 90 also has contribution to the intensity of the MoCA signal of transmission in MoCA network 14.The inhibition ability of MoCA frequency rejects trap 90 partly through reflection MoCA signal but not the power or the intensity that absorb the MoCA signal realize.Directly pass splitter/combiner 94 downstream from the MoCA signal of MoCA frequency rejects trap 90 reflections.Although the intensity of the MoCA signal of reflection is divided by splitter/combiner 94, the intensity of the division reflection MoCA signal at signal component leg 91,92,93 and 95 places is added to the intensity of the MoCA signal of signal component leg 91,92,93 and the existence of 95 places.Under the situation of the additive effect that does not come spontaneous fission reflection MoCA signal, the intensity of the obtainable MoCA signal of signal component leg 91,92,93 and 95 places depends on that fully splitter jumps.As discussed above, splitter jumps and relates to the significant signal decay, therefore significantly reduces the MoCA signal strength signal intensity at port 50,52,54 and 56 places.Through adding, with being delivered to can significantly strengthening through the signal reflection characteristic of MoCA frequency rejects trap 90 of MoCA interface arrangement 72 from the MoCA signal that signal component leg 91,92,93 and 95 obtains from the effect of the division MoCA signal of MoCA frequency rejects trap 90 reflections.
The signal strength signal intensity of the enhancing through the MoCA signal created from the reflection of MoCA frequency rejects trap 90 also has contribution to the intensity that reduces the MoCA signal that sees through MoCA frequency rejects trap 90.As discussed above, MoCA communication protocol is had the ability in the information that transmits and receives the signal strength signal intensity that the transmission description receives between the MoCA interface arrangement.Low signal intensity will cause launching the intensity that the MoCA interface arrangement increases the signal of being launched.Under the situation from the additive effect of the division reflection MoCA signal at signal component leg 91,92,93 and 95 places not, receiving the signal strength signal intensity that the MoCA interface arrangement receives will jump and significantly decay owing to the splitter of MoCA signal between the signal component leg of splitter/combiner 94.The signal strength signal intensity that reduces will be passed to emission MoCA interface arrangement, and emission MoCA interface arrangement will respond through the intensity that increases the MoCA signal of being launched.The intensity of the increase of the MoCA signal of being launched will can not suppressed by MoCA frequency rejects trap 90 equally effectively, allow more remaining MoCA signal strength signal intensity to see through the CATV signal communication paths that gets into couple in adapter thus.Yet; Through the MoCA signal strength signal intensity of enhancing signal component leg 91,92,93 and 95 owing to the additive effect of the MoCA signal that reflects from MoCA frequency rejects trap 90; The signal strength signal intensity of the MoCA signal of being launched is lower, causes less MoCA signal to see through and the correct function of less required MoCA signal suppressing with acquisition eMTA device 21.
When the 3rd MoCA frequency rejects trap 108 was connected to the CATV access interface 44 of CATV couple in adapter 10, the 2nd MoCA frequency rejects trap 104 was important.Remaining certain part that sees through the MoCA signal is from 108 reflections of the 3rd MoCA frequency rejects trap, and those repressed remaining MoCA signals arrive passive communication path 79 through splitter/combiner 76.Therefore, comprise that at CATV access interface 44 places the 3rd MoCA frequency rejects trap 108 has strengthened intensity or the power that is transmitted to the remaining MoCA frequency in the passive communication path 79 owing to signal reflex.
10 pairs of CATV couple in adapters can be from the service quality useful contribution of catv network 20 with 14 acquisitions of MoCA network.Even, still keep the correct function of the eMTA device 21 at place, subscriber guard station when eMTA device 21 is not that MoCA enables and the MoCA network is created as when having couple in adapter 21.(one or more) MoCA frequency rejects trap is controlled those and is seen through the remaining MoCA signal that gets into passive CATV signal communication paths from the MoCA network, remains connected to the liaison of couple in adapter 10 or the expectation function of another eMTA device thus.CATV couple in adapter 10 works between all MoCA interface arrangements and multimedia device, to transmit the MoCA signal of sufficient intensity as the MoCA hub fully, keeps the CATV function of expection simultaneously.The CATV couple in adapter also prevents or greatly hinders the MoCA signal to arrive catv network, avoids damaging the privacy and the fail safe of the MoCA content in the MoCA network that expection only maintains the subscriber guard station thus.Similarly, the CATV couple in adapter also prevents or greatly hinders on the catv network 20 the MoCA signal that exists to get into the correct function that adapter and interference are connected to the subscriber device of couple in adapter.The favourable function of CATV couple in adapter is in the housing of CATV couple in adapter, to obtain, and protects the function of this hope to avoid undelegated thus to distort, install carelessness and physics exposes.The multi-functional aspect of CATV couple in adapter allows it to use in many cases, increases the economy of its scale and use thus and promotes that CATV service provider's bigger installation is convenient.CATV couple in adapter 10 allows the subscriber to expand more neatly and changes their CATV subscriber device and their MoCA network and multimedia device.
After obtaining full appreciation of the present invention, these improve with other and the meaning of advantage will become obvious.Preceding text have specifically described the preferred embodiments of the present invention and many improvement thereof.This detailed description is to realize the description of preferred exemplary of the present invention.The details of describing not necessarily plans to limit scope of the present invention.Scope of the present invention is defined by the following claims.

Claims (15)

1. CATV couple in adapter, it uses at place, subscriber guard station and has: access interface is used for transmitting downstream and stream signal with catv network; Passive port is used for transmitting downstream and stream signal with the eMTA subscriber device that is connected to said passive port; And a plurality of source port arranged; Be used for being connected to the said active subscriber device transmission of the CATV CATV upstream and downstream signal that source port is arranged; Said have source port also being connected between the subscriber device that the said MoCA that source port arranged enables in the MoCA network transmit the MoCA signal, said CATV couple in adapter comprises:
The first two-way splitter/combiner; It has common terminal; Said common terminal is connected to said access interface to transmit CATV downstream and stream signal with said catv network; Said first division device/combiner also has the signal component leg of first and second separation; Said first division device/combiner makes the CATV downstream signal be split into division CATV downstream signal and said division CATV downstream signal is offered the said first and second signal component legs, and said first division device/combiner is created single combination stream signal and said combination stream signal is offered said common terminal according to each stream signal that receives at the said first and second signal component leg places;
The passive signal communication path, it conducts passive signal between extending with the said first signal component leg at said passive port and said first division device/combiner between the said first signal component leg of said first division device/combiner and the said passive port;
Active signal communication path, its said secondary signal component leg from said first division device/combiner extend with conduction to be gone to and from the active signal of the said secondary signal component leg of said first division device/combiner;
The second two-way splitter/combiner; It has common terminal and a plurality of signal component legs that separate; Each signal component leg has been connected to source port; Said second splitter/combiner makes each signal that receives at its common terminal place be split into heading signal and each heading signal is offered each signal component leg, and said second splitter/combiner also makes up active signal and said combination active signal is offered its common terminal according to each CATV stream signal that receives at each signal component leg place and MoCA signal creation;
Second splitter/combiner, it carries out aforementioned signal division and signal combination to CATV downstream signal, CATV stream signal and MoCA signal; And
The one MoCA frequency rejects trap; It is connected between said active signal communication path and said second splitter/combiner, and a said MoCA frequency rejects trap suppresses to come the quite most power of the MoCA signal that the common terminal place of comfortable said second splitter/combiner exists and through being delivered to and transmitting the CATV upstream and downstream signal that source port is arranged from said.
2. according to the CATV couple in adapter described in the claim 1, wherein:
A said MoCA frequency rejects trap makes and comes the power reflection of the MoCA signal that the common terminal since said second splitter/combiner receives to return in the common terminal of said second splitter/combiner; And
Said second splitter/combiner will offer the signal component leg of said second splitter/combiner from the MoCA signal of said MoCA frequency rejects trap reflection as division reflection MoCA signal.
3. according to the CATV couple in adapter described in the claim 2, wherein:
When being connected to when transmitting the MoCA signal between the subscriber device that the said said MoCA that source port arranged enables, the MoCA signal passes through between the signal component leg of said second splitter/combiner;
Said second splitter/combiner will offer the signal component leg of said second splitter/combiner from the MoCA signal of said MoCA frequency rejects trap reflection as division reflection MoCA signal; And
The power of said division reflection MoCA signal adds power at the MoCA signal that passes through between the signal component leg of said second splitter/combiner to strengthen the power of the MoCA signal that in said MoCA network, transmits.
4. according to the CATV couple in adapter described in the claim 3, wherein:
MoCA signal passing through between the signal component leg of said second splitter/combiner makes the strength retrogression who passes through the obtainable MoCA signal of each signal component leg of said second splitter/combiner that obtains from said; And
From decay said MoCA frequency rejects trap reflection and the MoCA signal is reflected in conduction less than the said division that is caused by passing through between each signal component leg of said second splitter/combiner through the decay of the MoCA signal of said second splitter/combiner.
5. according to the CATV couple in adapter described in the claim 1, further comprise:
The 2nd MoCA frequency rejects trap; It is connected in said passive signal communication path between the said first signal component leg and said passive port of said first division device/combiner; Said the 2nd MoCA frequency rejects trap prevents to arrive said passive port from the quite most power of the MoCA signal at the said first signal component leg place of said first division device/combiner, and said the 2nd MoCA frequency rejects trap is not having under the situation about decaying through being delivered to and transmitting from the CATV of said passive port upstream and downstream signal basically.
6. according to the CATV couple in adapter described in the claim 5, wherein:
In the said first and second MoCA frequency rejects traps each has the ability that substantially the same being used to suppresses the MoCA signal.
7. according to the CATV couple in adapter described in the claim 5, wherein: each in the said first and second MoCA frequency rejects traps has the ability that is used to suppress the MoCA signal of 30dB at least.
8. according to the CATV couple in adapter described in the claim 5, further comprise:
The 3rd MoCA frequency rejects trap; It is connected between the common terminal and said access interface of said first division device/combiner; Said the 3rd MoCA frequency rejects trap prevents to get into said catv network from the quite most power of the MoCA signal of the common terminal place existence of said first division device/combiner; And prevent from the very most power of any MoCA signal that exists on the said catv network through said couple in adapter arrive said passive with source port is arranged, and not have basically under the situation about decaying through being delivered to and transmitting from the CATV of said access interface upstream and downstream signal.
9. the CATV couple in adapter described in according to Claim 8, wherein:
Said first, second with the 3rd MoCA frequency rejects trap in each have the ability that substantially the same being used to suppresses the MoCA signal.
10. according to the CATV couple in adapter described in the claim 9, wherein:
In the said first and second MoCA frequency rejects traps each has the ability that is used to suppress the MoCA signal of 30dB at least.
11. the CATV couple in adapter according to Claim 8 further comprises:
Housing; And wherein:
Said access interface, said passive port saidly has source port to be connected to said housing with all;
Each port section ground is formed by wire and cable connector; And
Said first and second two-way splitter/couplers, said passive and active signal communication path and the said first and second and the 3rd MoCA frequency rejects trap are positioned at said housing.
12. the CATV couple in adapter according to described in the claim 1 further comprises:
Other a MoCA frequency rejects trap; It is connected between the common terminal and said access interface of said first division device/combiner; Said other MoCA frequency rejects traps prevent to get into said catv network from the quite most power of the MoCA signal of the common terminal place existence of said first division device/combiner; And prevent from the very most power of any MoCA signal that exists on the said catv network through said couple in adapter arrive said passive with source port is arranged, and not have basically under the situation about decaying through being delivered to and transmitting from the CATV of said access interface upstream and downstream signal.
13. according to the CATV couple in adapter described in the claim 1, wherein:
Said active signal communication path comprises active downstream signal communication path of CATV and the active stream signal communication path of CATV;
The active downstream signal communication path of said CATV comprises at least one active electronic component, and it need provide electrical power to be delivered to the said CATV downstream signal that source port is arranged to be used to regulate from said access interface through the active downstream signal communication path of said CATV;
The active downstream signal communication path of said CATV is through the CATV downstream signal in the predetermined C ATV downstream frequency band and suppress all downstream signals of other frequencies basically;
The active stream signal communication path of said CATV is delivered to said catv network with the CATV stream signal from the subscriber device that is connected said active port;
The active stream signal communication path of said CATV is through the CATV stream signal in the predetermined C ATV upstream frequency band and suppress all stream signal of other frequencies basically; And
Said CATV passive signal communication path and said the 2nd MoCA frequency rejects trap all do not have need provide electrical power to be used to influence the passive downstream of CATV of between said access interface and said passive port, transmitting and the active electronic component of stream signal.
14. according to the CATV couple in adapter described in the claim 13, wherein:
The needs of the active downstream signal communication path of said CATV provide an active electronic component of electrical power to comprise signal amplifier.
15. according to the CATV couple in adapter described in the claim 13, wherein:
The active stream signal communication path of said CATV comprises that invading noise alleviates circuit, and it is controlled from said in operation has the upper reaches of source port to invade noise.
CN2011200368778U 2010-01-21 2011-01-21 CATV access adapter Expired - Fee Related CN202435501U (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/691149 2010-01-21
US12/691,149 US8510782B2 (en) 2008-10-21 2010-01-21 CATV entry adapter and method for preventing interference with eMTA equipment from MoCA Signals

Publications (1)

Publication Number Publication Date
CN202435501U true CN202435501U (en) 2012-09-12

Family

ID=44465188

Family Applications (2)

Application Number Title Priority Date Filing Date
CN2011200368778U Expired - Fee Related CN202435501U (en) 2010-01-21 2011-01-21 CATV access adapter
CN2011100370861A Pending CN102164255A (en) 2010-01-21 2011-01-21 CATV entry adapter and method for preventing interference with eMTA equipment from MoCA signals

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN2011100370861A Pending CN102164255A (en) 2010-01-21 2011-01-21 CATV entry adapter and method for preventing interference with eMTA equipment from MoCA signals

Country Status (2)

Country Link
CN (2) CN202435501U (en)
TW (1) TW201145907A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111247810A (en) * 2017-10-06 2020-06-05 Ppc宽带股份有限公司 Network interface device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10154302B2 (en) 2008-10-13 2018-12-11 Ppc Broadband, Inc. CATV entry adapter and method for distributing CATV and in-home entertainment signals
US11910052B2 (en) 2008-10-21 2024-02-20 Ppc Broadband, Inc. Entry device for communicating external network signals and in-home network signals
CN106791557A (en) * 2017-02-22 2017-05-31 贝思特宽带通讯(烟台)有限公司 Signal processing method and signal amplifying apparatus for processing MoCA signals
CN111602373B (en) * 2018-01-17 2022-05-13 Ppc宽带股份有限公司 Reflection-free household network adapter
WO2019143616A1 (en) * 2018-01-19 2019-07-25 Ppc Broadband, Inc. Dual-network splitter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004525533A (en) * 2000-08-30 2004-08-19 ティアリス， インコーポレイテッド Home network system and method
US7675381B2 (en) * 2007-12-12 2010-03-09 Soontai Tech Co., Ltd. Modulized wave filter
CN101568004A (en) * 2008-04-25 2009-10-28 上海润欣科技有限公司 CATV integrated access system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111247810A (en) * 2017-10-06 2020-06-05 Ppc宽带股份有限公司 Network interface device
US11323655B2 (en) 2017-10-06 2022-05-03 Ppc Broadband, Inc. Network interface device
CN111247810B (en) * 2017-10-06 2022-05-03 Ppc宽带股份有限公司 Network interface device

Also Published As

Publication number Publication date
CN102164255A (en) 2011-08-24
TW201145907A (en) 2011-12-16

Similar Documents

Publication Publication Date Title
US8429695B2 (en) CATV entry adapter and method utilizing directional couplers for MoCA signal communication
US9860591B2 (en) Passive multi-port entry adapter and method for preserving downstream CATV signal strength within in-home network
US8510782B2 (en) CATV entry adapter and method for preventing interference with eMTA equipment from MoCA Signals
US9781472B2 (en) CATV entry adapter and method for distributing CATV and in-home entertainment signals
CN202435501U (en) CATV access adapter
US11528526B2 (en) Entry device for communicating external network signals and in-home network signals
US20130081096A1 (en) Cable television entry adapter
US20200195883A1 (en) Cable television entry adapter
CN202183824U (en) CATV entry adapter
US11910052B2 (en) Entry device for communicating external network signals and in-home network signals

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120912

Termination date: 20140121