WO2016192470A1 - 抑制噪声干扰的方法及装置 - Google Patents

抑制噪声干扰的方法及装置 Download PDF

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Publication number
WO2016192470A1
WO2016192470A1 PCT/CN2016/079320 CN2016079320W WO2016192470A1 WO 2016192470 A1 WO2016192470 A1 WO 2016192470A1 CN 2016079320 W CN2016079320 W CN 2016079320W WO 2016192470 A1 WO2016192470 A1 WO 2016192470A1
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Prior art keywords
uplink
noise interference
processing module
attenuator
service processing
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PCT/CN2016/079320
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English (en)
French (fr)
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杜敏佳
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中兴通讯股份有限公司
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Priority to EP16802393.5A priority Critical patent/EP3306917B1/en
Publication of WO2016192470A1 publication Critical patent/WO2016192470A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6156—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network
    • H04N21/6168—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network involving cable transmission, e.g. using a cable modem
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2801—Broadband local area networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6118—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving cable transmission, e.g. using a cable modem
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for suppressing noise interference.
  • Ethernet Ethernet access technologies have emerged, among which passive
  • DOCSIS Data Over Cable Service Interface Specifications
  • PON Passive Optical Network
  • the present invention provides a method and apparatus for suppressing noise interference to at least solve the problem of introducing noise interference in a signal backhaul process in the related art.
  • a method for suppressing noise interference including:
  • Each attenuator is connected to each uplink of the terminal, and the wired cable data service interface specification DOCSIS service processing module is connected to the attenuator;
  • the DOCSIS service processing module configures an attenuation value of the attenuator, and sequentially determines whether each path of each uplink has noise interference;
  • the uplink is closed.
  • determining, in sequence, whether each path of each uplink has noise interference includes:
  • noise interference disappears, it indicates that the uplink introduces noise interference.
  • the method includes:
  • the attenuation value of the attenuator of the uplink is configured to open the uplink.
  • the method includes:
  • each uplink includes at least one of the following: four uplinks, three uplinks, two uplinks, and one uplink.
  • each of the attenuators is coupled to a directional coupler that mixes the low frequency data signals into an upstream data signal US for transmission to the DOCSIS service processing module.
  • an apparatus for suppressing noise interference comprising: an attenuator and a cable cable data service interface specification DOCSIS service processing module;
  • Each of the attenuators is connected to each uplink of the terminal, and the DOCSIS service processing module is connected to the attenuator;
  • the DOCSIS service processing module configures an attenuation value of the attenuator for sequentially determining whether each path of each uplink has noise interference;
  • the DOCSIS service processing module determines an uplink with noise interference
  • the DOCSIS service processing module closes the uplink.
  • the DOCSIS service processing module sequentially sets the attenuation value of the attenuator of each channel of each uplink to a maximum, and the attenuation value of the uplink is set to a maximum indication of being off.
  • the uplink checking whether noise interference is eliminated;
  • noise interference disappears, it indicates that the uplink introduces noise interference.
  • the DOCSIS service processing module configures an attenuation value of the uplink attenuator to activate the uplink if the indication is that the uplink does not introduce noise interference.
  • the DOCSIS service processing module detects whether the noise interference of the uplink is eliminated, and in the case of cancellation, the DOCSIS service processing module reconfigures the attenuation of the attenuator of the uplink Value, the uplink is opened.
  • each uplink includes at least one of the following: four uplinks, three uplinks Road, two uplinks, one uplink.
  • the apparatus further includes: a directional coupler
  • Each of the attenuators is coupled to the directional coupler, which mixes the low frequency data signals into an upstream data signal US for transmission to the DOCSIS service processing module.
  • each attenuator is connected to each uplink of the terminal, and the wired cable data service interface specification DOCSIS service processing module is connected to the attenuator; the DOCSIS service processing module configures the attenuation value of the attenuator, and sequentially determines the uplinks. Whether there is noise interference in each path of the link; after the DOCSIS service processing module determines the uplink with noise interference, the uplink is closed, which solves the problem of introducing noise interference during signal backhaul and suppresses the backhaul. Noise interference in the link.
  • FIG. 1 is a flow chart of a method of suppressing noise interference according to an embodiment of the present invention
  • FIG. 2 is a block diagram showing a principle of mixing CATV and DOCSIS signals according to the related art
  • FIG. 3 is a block diagram of a programmable noise switching circuit in accordance with a preferred embodiment of the present invention.
  • FIG. 1 is a flowchart of a method for suppressing noise interference according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 each attenuator is connected to each uplink of the terminal, and the wired cable data service interface specification DOCSIS service processing module is connected to the attenuator;
  • Step S104 the DOCSIS service processing module configures an attenuation value of the attenuator, and sequentially determines whether each channel of each uplink has noise interference;
  • Step S106 after the DOCSIS service processing module determines the uplink with noise interference, the uplink is closed.
  • each attenuator is connected to each uplink of the terminal, and is connected with the DOCSIS service processing module.
  • the DOCSIS service processing module configures the attenuation value of the attenuator, determines whether there is noise interference in each path of each uplink, and closes the uplink with noisy interference, thereby solving the problem of introducing noise interference during signal backhaul. Noise interference in the backhaul link is suppressed.
  • the attenuation value is set by the attenuator to turn on or off the uplink to sequentially determine whether each channel of each uplink has noise interference, for example, attenuator for each channel of each uplink in turn.
  • the attenuation value is set to the maximum, and the attenuation value of the uplink is set to the maximum indication to turn off the uplink, to check whether the noise interference is eliminated; if the noise interference still exists, the indication is that the uplink does not introduce noise interference. If the noise interference disappears, it indicates that the uplink introduces noise interference.
  • the DOCSIS service processing module configures an attenuation value of the attenuator of the uplink to open the uplink when the indication is that the uplink does not introduce noise interference.
  • each uplink includes at least one of the following: four uplinks, three uplinks, two uplinks, and one uplink.
  • the attenuators can also be coupled to a directional coupler that mixes the low frequency data signals into an upstream data signal US for transmission to the DOCSIS service processing module.
  • a device for suppressing noise interference is also provided in the embodiment, and the device is used to implement the above-mentioned embodiments and preferred embodiments, and the description thereof has been omitted.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • a device for suppressing noise interference includes: an attenuator and a cable cable data service interface specification DOCSIS service processing module;
  • Each of the attenuators is connected to each uplink of the terminal, and the DOCSIS service processing module is connected to the attenuator;
  • the DOCSIS service processing module configures an attenuation value of the attenuator for sequentially determining whether each path of each uplink has noise interference;
  • the DOCSIS service processing module determines an uplink with noise interference
  • the DOCSIS service processing module closes the uplink.
  • each attenuator is connected to each uplink of the terminal and connected to the DOCSIS service processing module, and the DOCSIS service processing module configures the attenuation value of the attenuator to determine whether there is noise in each of the uplinks. Interference, closing the uplink with noisy interference, solves the problem of introducing noise interference during signal backhaul, and suppresses noise interference in the backhaul link.
  • the DOCSIS service processing module sequentially sets the attenuation value of the attenuator of each channel of each uplink to a maximum, and the attenuation value of the uplink is set to a maximum indication to turn off the uplink. Check if noise interference is eliminated;
  • noise interference disappears, it indicates that the uplink introduces noise interference.
  • the DOCSIS service processing module configures an attenuation value of the attenuator of the uplink to open the uplink when the indication is that the uplink does not introduce noise interference.
  • the DOCSIS service processing module detects whether the noise interference of the uplink is eliminated. In the case of cancellation, the DOCSIS service processing module reconfigures the attenuation value of the attenuator of the uplink, and activates the uplink. road.
  • each uplink includes at least one of the following: four uplinks, three uplinks, two uplinks, and one uplink.
  • the device further includes: a directional coupler
  • Each of the attenuators is coupled to the directional coupler, which mixes the low frequency data signals into an upstream data signal US for transmission to the DOCSIS service processing module.
  • the preferred embodiment combines a unique mixing mode of the data signal and the CATV signal in the DOCSIS EOC to design a programmable noise switching circuit for suppressing noise interference in the data backhaul link.
  • the DOCSIS EOC scheme of the related art there are four types of devices: 1 in 1 out, 2 in 2 out, 3 in 3 out, and 4 in 4 out.
  • the more used type is the 4 input and 4 output type, that is, the 4-way CATV signal enters the cable media converter (Cable Media Converter, CMC for short) and the DOCSIS data service signal, and the output 4-channel mixing signal is in the same Transfer on the shaft cable.
  • CMC Cable Media Converter
  • DOCSIS is a data access technology that uses Frequency Division Duplex (FDD) mode of operation.
  • the uplink and downlink data are respectively used in different frequency bands, and all adopt full-duplex mode to implement data.
  • Two-way transmission The frequency band of the uplink data transmission is: 5-65 MHz, and the frequency band of the downlink data transmission is: 87-1004 MHz.
  • the working frequency band of the CATV signal is: 87-870MHz,
  • FIG. 2 is a block diagram of a mixing principle of a CATV and a DOCSIS signal according to the related art.
  • FIG. 2 according to the above frequency band division, a specific mixing manner of a DOCSIS service signal and a CATV signal is shown in FIG. 2 (as shown in FIG. 2).
  • the example is as follows: In Figure 2, only the first road is drawn, and the structures of 2, 3, 4 and 1 are exactly the same.
  • the downlink data signal DS (Downstream) output by the DOCSIS service module is divided into 4 channels through the four distributors, and after passing through the amplifier, each of the channels is mixed with the 4 channels of the 4 channels of the CATV, respectively.
  • DS Downstream
  • a schematic diagram in which one of the data services is mixed with CATV1 is drawn, and is output to the user's home through high-pass filtering of the duplexer.
  • the user's backhaul 4 signals are input to the mixed port COM ports of the four duplexers, and the low-frequency data signals are filtered out by the duplexer's low-pass filter, and the 4-way directional couplers are used respectively.
  • the low frequency signals input from the four COM ports are mixed into an uplink data signal US (Upstream) and sent to the DOCSIS service module.
  • the user returns the channel, that is, the upstream direction of the data signal, because it is multi-channel backhaul and then coupled through a directional coupler. If any noise is introduced in any way during the backhaul, it will affect the quality of the returned signal. And it is a multi-channel return, it is difficult to judge which path is introduced.
  • FIG. 3 is a block diagram of a programmable noise switching circuit in accordance with a preferred embodiment of the present invention.
  • the preferred embodiment of the present invention is added to the four uplinks.
  • Programmable attenuator The attenuation value of the attenuator is software controllable, and the system can control the attenuation value of each channel according to actual needs.
  • the software controls the attenuator, and the attenuation value of each channel is set to the maximum in turn, which is equivalent to turning off the link and checking whether the interference is eliminated. If the interference still exists, it indicates that the interference introduced by the link is not.
  • the attenuation value of the software reconfiguration attenuator is 0, and the link is opened. If the Nth channel is turned off and the interference is eliminated, it can be determined that the interference is introduced by the Nth path. After determining the interference introduced by the first few channels, keep the link in the off state. After the interference of this path is removed, the software controls the link to decay to 0 and reopens the backhaul link.
  • the preferred embodiment of the present invention takes the form of 4 in 4 out, for example, the principle of 3 in 3 out, 2 in 2 out, and 1 in 1 out is the same as 4 in 4 out, except that the four directional couplers in the figure are respectively changed. It is a 3-way and 2-way directional coupler, and 1 input and 1 output do not require a directional coupler.
  • the preferred embodiment of the present invention adds programmable attenuators ATT1-ATT4 to the four uplinks, as shown in FIG. 3, which is shown in FIG.
  • ATT1 attenuator
  • the attenuator control line of the ATT is connected to the service processing module, and the system can control the attenuation value of each channel according to actual needs.
  • the specific implementation manner is that, when the service is normal, the four-way ATT_LE_N (signal enable control signal) is pulled down by default, that is, the attenuation value is 0, and the signal is directly transmitted back to the DOCSIS service module.
  • the software controls the attenuator, which sets the attenuation value of 1 to 4 channels to the maximum in turn, which is equivalent to shutting down the link and checking the interference. Whether to eliminate, if the interference still exists, it means that the interference introduced by the link is not, and the attenuation value of the software reconfiguration attenuator is 0, and the link is opened.
  • the Nth channel is turned off and the interference is eliminated, it can be determined that the interference is introduced by the Nth path. After determining the interference introduced by the first few channels, keep the link in the off state. After the interference of this path is removed, the software controls the link to decay to 0 and reopens the backhaul link.
  • the preferred embodiment of the invention described above discloses a programmable noise switching circuit for suppressing noise interference in a link.
  • the circuit is applied to a cable network conversion device CMC using a passive optical network (PON) + DOCSIS EoC technology access solution, which can effectively determine which link in the multi-path backhaul link of the device is interfered with. And depending on the actual situation, you need to reduce the interference or turn off the link.
  • PON passive optical network
  • FIG. 3 is a schematic block diagram of the 4 input and 4 output solutions, and the preferred embodiment is applicable to 3 in 3 out, 2 in 2 out and 1 in 1 out device form. Only the four-way directional coupler in Figure 3 is replaced by a 3-way, 2-way directional coupler, and a 1-in-1 output does not require a directional coupler.
  • a programmable noise switching circuit for suppressing noise interference in the link in the cable media conversion device.
  • the four signals of the user's backhaul are respectively input to the four mixing ports COM, and pass through the low-pass filter of the duplexer. Filter out low frequency data
  • the signal using a 4-way directional coupler, mixes the low-frequency signals input from the four COM ports into US and sends them to the DOCSIS service processing module.
  • the attenuation value of the attenuator is software controllable, and the system can control the attenuation value of each channel according to actual needs.
  • a programmable noise switching circuit for suppressing noise interference in a link in a cable cable media conversion device, in the uplink direction, when any one of the four paths introduces noise for various reasons, interferes with normal service processing, and the software controls the attenuator
  • the attenuation value of each channel is set to the maximum, which is equivalent to shutting down the link and checking whether the interference is eliminated. If the interference still exists, it indicates that the interference introduced by the link is not, and the attenuation value of the software reconfigurable attenuator is 0. Open this link. If the Nth channel is turned off and the interference is eliminated, it can be determined that the interference is introduced by the Nth path. After determining the interference introduced by the first few channels, keep the link in the off state. After the interference of this path is removed, the software controls the link to decay to 0 and reopens the backhaul link.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method of various embodiments of the present invention.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the method steps of the above embodiment:
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • a mobile hard disk e.g., a hard disk
  • magnetic memory e.g., a hard disk
  • the processor executes the method of the above embodiment according to the stored program code in the storage medium.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • each attenuator is connected to each uplink of the terminal, and the wired cable data service interface specification DOCSIS service processing module is connected to the attenuator; the DOCSIS service processing module configures the attenuation of the attenuator And determining, in sequence, whether each path of each uplink has noise interference; after determining, by the DOCSIS service processing module, that the uplink has noise interference, the uplink is closed, and noise interference is introduced in the signal backhaul process.
  • the problem is to suppress noise interference in the backhaul link.

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Abstract

本发明提供了一种抑制噪声干扰的方法及装置，其中，该方法将各衰减器与终端的各上行链路连接，有线电缆数据服务接口规范DOCSIS业务处理模块与该衰减器连接；该DOCSIS业务处理模块配置该衰减器的衰减值，依次确定该各上行链路的每一路是否存在噪声干扰；该DOCSIS业务处理模块确定出存在噪声干扰的上行链路后，关闭该上行链路，解决了信号回传过程中引入了噪声干扰的问题，抑制了回传链路中噪声干扰。

Description

抑制噪声干扰的方法及装置 技术领域
本发明涉及通信领域，具体而言，涉及一种抑制噪声干扰的方法及装置。
背景技术
为了实现在同一根入户铜缆上同时提供视频、语音、宽带等多业务目的三网融合功能，各种铜缆以太网接入技术(Ethernet Over Cable，简称为EoC)相继出现，其中无源光网络(Passive Optical Network，简称为PON)中的有线电缆数据服务接口规范(Data Over Cable Service Interface Specifications，简称为DOCSIS)的EoC技术得到广泛关注和应用。
但需要在入户铜缆上实现同时传输DOCSIS EoC数据业务和社区公共电视天线系统(Community Antenna Television，简称为CATV)电视业务，这就要求DOCSIS数据业务信号和CATV信号进行混频输出。
在相关技术中，CATV网络的光端机节点大部分已经下移到小区或楼道，且主要的形态为多路射频输出，因此需要实现多路CATV射频信号与数据信号的混合。这种混合的实现方式需要将DOCSIS数据信号也分成相应的多路信号。信号回传过程中任何一路引入了噪声干扰，都会影响回传信号的质量，且难判断是哪路引入的干扰，给抑制噪声干扰带来了一定的难度。
针对相关技术中，信号回传过程中引入了噪声干扰的问题，目前尚未提出有效的解决方案。
发明内容
本发明提供了一种抑制噪声干扰的方法及装置，以至少解决相关技术中信号回传过程中引入了噪声干扰的问题。
根据本发明的一个实施例，提供了一种抑制噪声干扰的方法，包括：
各衰减器与终端的各上行链路连接，有线电缆数据服务接口规范DOCSIS业务处理模块与所述衰减器连接；
所述DOCSIS业务处理模块配置所述衰减器的衰减值，依次确定所述各上行链路的每一路是否存在噪声干扰；
所述DOCSIS业务处理模块确定出存在噪声干扰的上行链路后，关闭所述上行链路。
在本发明的实施例中，依次确定所述各上行链路的每一路是否存在噪声干扰包括：
依次对所述各上行链路的每一路的衰减器的衰减值设置到最大，上行链路的所述衰减值 设置为最大指示为关断所述上行链路，检查噪声干扰是否消除；
若所述噪声干扰依然存在，则指示不是所述上行链路引入了噪声干扰；
若所述噪声干扰消失，则指示所述上行链路引入了噪声干扰。
在本发明的实施例中，在指示不是所述上行链路引入了噪声干扰情况下，所述方法包括：
配置所述上行链路的衰减器的衰减值，开通所述上行链路。
在本发明的实施例中，关闭存在噪声干扰的所述上行链路后，所述方法包括：
检测所述上行链路的噪声干扰是否消除，在消除的情况下，重新配置所述上行链路的衰减器的衰减值，开通所述上行链路。
在本发明的实施例中，所述各上行链路包括以下至少之一：四路上行链路，三路上行链路，两路上行链路，一路上行链路。
在本发明的实施例中，所述各衰减器与定向耦合器连接，所述定向耦合器将低频数据信号混合为上行数据信号US，发送到所述DOCSIS业务处理模块。
根据本发明的另一个实施例，还提供了一种抑制噪声干扰的装置，包括：衰减器和有线电缆数据服务接口规范DOCSIS业务处理模块；
各所述衰减器与终端的各上行链路连接，所述DOCSIS业务处理模块与所述衰减器连接；
所述DOCSIS业务处理模块配置所述衰减器的衰减值，用于依次确定所述各上行链路的每一路是否存在噪声干扰；
在所述DOCSIS业务处理模块确定出存在噪声干扰的上行链路后的情况下，所述DOCSIS业务处理模块关闭所述上行链路。
在本发明的实施例中，所述DOCSIS业务处理模块依次对所述各上行链路的每一路的衰减器的衰减值设置到最大，上行链路的所述衰减值设置为最大指示为关断所述上行链路，检查噪声干扰是否消除；
若所述噪声干扰依然存在，则指示不是所述上行链路引入了噪声干扰；
若所述噪声干扰消失，则指示所述上行链路引入了噪声干扰。
在本发明的实施例中，在指示不是所述上行链路引入了噪声干扰情况下，所述DOCSIS业务处理模块配置所述上行链路的衰减器的衰减值，开通所述上行链路。
在本发明的实施例中，所述DOCSIS业务处理模块检测所述上行链路的噪声干扰是否消除，在消除的情况下，所述DOCSIS业务处理模块重新配置所述上行链路的衰减器的衰减值，开通所述上行链路。
在本发明的实施例中，所述各上行链路包括以下至少之一：四路上行链路，三路上行链 路，两路上行链路，一路上行链路。
在本发明的实施例中，所述装置还包括：定向耦合器；
各所述衰减器与所述定向耦合器连接，所述定向耦合器将低频数据信号混合为上行数据信号US，发送到所述DOCSIS业务处理模块。
通过本发明，各衰减器与终端的各上行链路连接，有线电缆数据服务接口规范DOCSIS业务处理模块与该衰减器连接；该DOCSIS业务处理模块配置该衰减器的衰减值，依次确定该各上行链路的每一路是否存在噪声干扰；该DOCSIS业务处理模块确定出存在噪声干扰的上行链路后，关闭该上行链路，解决了信号回传过程中引入了噪声干扰的问题，抑制了回传链路中噪声干扰。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例的一种抑制噪声干扰的方法的流程图；
图2是根据相关技术中的CATV与DOCSIS信号混频原理框图；
图3是根据本发明优选实施的可编程噪声开关电路原理框图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
在本实施例中提供了一种抑制噪声干扰的方法，图1是根据本发明实施例的一种抑制噪声干扰的方法的流程图，如图1所示，该流程包括如下步骤：
步骤S102，各衰减器与终端的各上行链路连接，有线电缆数据服务接口规范DOCSIS业务处理模块与该衰减器连接；
步骤S104，该DOCSIS业务处理模块配置该衰减器的衰减值，依次确定该各上行链路的每一路是否存在噪声干扰；
步骤S106，该DOCSIS业务处理模块确定出存在噪声干扰的上行链路后，关闭该上行链路。
通过上述步骤，各衰减器与终端的各上行链路连接，并与DOCSIS业务处理模块与连接， 该DOCSIS业务处理模块配置该衰减器的衰减值，确定该各上行链路的每一路是否存在噪声干扰，关闭有噪声干扰的上行链路，解决了信号回传过程中引入了噪声干扰的问题，抑制了回传链路中噪声干扰。
在本实施例中，通过衰减器设置衰减值来开通或者关闭上行链路来依次确定该各上行链路的每一路是否存在噪声干扰，例如，依次对该各上行链路的每一路的衰减器的衰减值设置到最大，上行链路的该衰减值设置为最大指示为关断该上行链路，检查噪声干扰是否消除；若该噪声干扰依然存在，则指示不是该上行链路引入了噪声干扰；若该噪声干扰消失，则指示该上行链路引入了噪声干扰。
其中，在指示不是该上行链路引入了噪声干扰情况下，DOCSIS业务处理模块配置该上行链路的衰减器的衰减值，开通该上行链路。
在本实施例中，关闭存在噪声干扰的该上行链路后，还可以检测该上行链路的噪声干扰是否消除，在消除的情况下，重新配置该上行链路的衰减器的衰减值，开通该上行链路。
在本实施例中，该各上行链路包括以下至少之一：四路上行链路，三路上行链路，两路上行链路，一路上行链路。该各衰减器还可以与定向耦合器连接，该定向耦合器将低频数据信号混合为上行数据信号US，发送到该DOCSIS业务处理模块。
在本实施例中还提供了一种抑制噪声干扰的装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
一种抑制噪声干扰的装置包括：衰减器和有线电缆数据服务接口规范DOCSIS业务处理模块；
各该衰减器与终端的各上行链路连接，该DOCSIS业务处理模块与该衰减器连接；
该DOCSIS业务处理模块配置该衰减器的衰减值，用于依次确定该各上行链路的每一路是否存在噪声干扰；
在该DOCSIS业务处理模块确定出存在噪声干扰的上行链路后的情况下，该DOCSIS业务处理模块关闭该上行链路。
通过上述装置，各衰减器与终端的各上行链路连接，并与DOCSIS业务处理模块与连接，该DOCSIS业务处理模块配置该衰减器的衰减值，确定该各上行链路的每一路是否存在噪声干扰，关闭有噪声干扰的上行链路，解决了信号回传过程中引入了噪声干扰的问题，抑制了回传链路中噪声干扰。
在本实施例中，该DOCSIS业务处理模块依次对该各上行链路的每一路的衰减器的衰减值设置到最大，上行链路的该衰减值设置为最大指示为关断该上行链路，检查噪声干扰是否消除；
若该噪声干扰依然存在，则指示不是该上行链路引入了噪声干扰；
若该噪声干扰消失，则指示该上行链路引入了噪声干扰。
其中，在指示不是该上行链路引入了噪声干扰情况下，该DOCSIS业务处理模块配置该上行链路的衰减器的衰减值，开通该上行链路。
在本实施例中，该DOCSIS业务处理模块检测该上行链路的噪声干扰是否消除，在消除的情况下，该DOCSIS业务处理模块重新配置该上行链路的衰减器的衰减值，开通该上行链路。
在本实施例中，该各上行链路包括以下至少之一：四路上行链路，三路上行链路，两路上行链路，一路上行链路。
在本实施例中，该装置还包括：定向耦合器；
各该衰减器与该定向耦合器连接，该定向耦合器将低频数据信号混合为上行数据信号US，发送到该DOCSIS业务处理模块。
下面结合优选实施例和实施方式对本发明进行详细说明。
本优选实施例结合DOCSIS EOC中数据信号与CATV信号特有的混频方式，设计了一款可编程的噪声开关电路，用于抑制数据回传链路中的噪声干扰。
在相关技术的DOCSIS EOC方案中，有1进1出、2进2出、3进3出和4进4出这四种设备型态。用的比较多的是4进4出的型态，即4路CATV信号同时进入有线电缆媒体转换设备(Cable Media Converter，简称为CMC)与DOCSIS数据业务信号混和，输出4路混频信号在同轴线缆上传输。其他几种型态以此类推。
DOCSIS是一种采用频分全双工(Frequency Division duplexing，简称为FDD)工作模式的数据接入技术，其上下行数据分别工作在不同的频段，且都采用全双工的模式，实现数据的双向传输。其上行数据传输的频段为：5-65MHz，下行数据传输的频段为：87-1004MHz。而CATV信号工作频段为：87-870MHz，
图2是根据相关技术中的CATV与DOCSIS信号混频原理框图，如图2所示，根据上面的频段划分，DOCSIS业务信号与CATV信号具体的混频方式如图2所示(以4进4出的为例)：图2中只画了第1路，2、3、4路与1路的结构完全相同。下行方向，DOCSIS业务模块输出的下行数据信号DS(Downstream)经过四分配器分成4路，再经过放大器后，其中的每一路分别与光站出来的4路CATV中1路混合，图2中只画出了其中1路数据业务与CATV1混合的示意图，通过双工器的高通滤波输出到用户家。上行方向，用户的回传的4路信号分别输入到4个双工器的混合口COM口，通过双工器的低通滤波器滤出低频数据信号，用4路的定向耦合器，分别将4个COM口输入进来的低频信号混合为上行数据信号US(Upstream)，送到DOCSIS业务模块。
用户回传通道，即数据信号的上行方向，由于是多路回传再通过一个定向耦合器耦合， 回传过程中若任何一路引入了噪声干扰，都会影响回传信号的质量。且是多路回传，较难判断是哪路引入的干扰。
图3是根据本发明优选实施的可编程噪声开关电路原理框图，如图3所示，为了检测并抑制回传通路上引入的噪声，本发明优选实施例在4路上行链路中分别加了可编程衰减器。衰减器的衰减值软件可控，系统可以根据实际需要控制每一路的衰减值。当四路中有任何一路因各种原因引入了噪声，干扰了正常的业务处理，软件控制衰减器，依次每一路的衰减值设置到最大，相当于关断此链路，检查干扰是否消除，若干扰依然存在，则说明不是此链路引入的干扰，软件重新配置衰减器的衰减值为0，打开此链路。若关断第N路时，干扰消除，则可确定是干扰是由第N路引入的。确定好是第几路引入的干扰后，保持此链路处于关断状态。等此路的干扰消除后，软件控制此链路衰减为0，重新打开此回传链路。
本发明优选实施例以4进4出的型态为例，3进3出、2进2出和1进1出的原理与4进4出一样，只是图中4路的定向耦合器分别换成3路、2路的定向耦合器，而1进1出不需要定向耦合器，直通即可。
为了检测并抑制回传通路上引入的噪声，本发明优选实施例明在4路上行链路中分别加了可编程衰减器ATT1-ATT4，如图3中所示，图3中画出了第1路的情况，2、3、4路与第1路相同，ATT1(attenuator)是软件可编程的数字衰减器，其衰减值可以在设置在0-31.5db，以1db为步进。ATT的衰减器控制线连到了业务处理模块，系统可以根据实际需要控制每一路的衰减值。
具体的实现方式为，在业务正常的情况下，四路的ATT_LE_N(信号使能控制信号)默认下拉，即衰减值为0，信号直通回传到DOCSIS业务模块。当四路中有任何一路因各种原因引入了噪声，干扰了正常的业务处理，软件控制衰减器，依次将1到4路的衰减值设置到最大，相当于关断此链路，检查干扰是否消除，若干扰依然存在，则说明不是此链路引入的干扰，软件重新配置衰减器的衰减值为0，打开此链路。若关断第N路时，干扰消除，则可确定是干扰是由第N路引入的。确定好是第几路引入的干扰后，保持此链路处于关断状态。等此路的干扰消除后，软件控制此链路衰减为0，重新打开此回传链路。
上述本发明的优选实施例公开了一种用于抑制链路中噪声干扰的可编程噪声开关电路。此电路应用于一种采用无源光网络(PON)+DOCSIS EoC技术接入方案的有线电缆媒体转换设备CMC中，能够有效判断设备的多路回传链路中哪一条链路受到了干扰，并且根据实际情况需要降低干扰或者关断此链路。
所述的有线电缆媒体转换设备中的用于抑制链路中噪声干扰可编程噪声开关电路，图3给出了4进4出方案的原理框图，本优选实施例同时适用于3进3出、2进2出和1进1出的设备形态。只是图3中4路的定向耦合器分别换成3路、2路的定向耦合器，而1进1出不需要定向耦合器。
有线电缆媒体转换设备中的用于抑制链路中噪声干扰可编程噪声开关电路，上行方向，用户的回传的4路信号分别输入到4个混合口COM，通过双工器的低通滤波器滤出低频数据 信号，用4路的定向耦合器，分别将4个COM口输入进来的低频信号混合为US，送到DOCSIS业务处理模块。
有线电缆媒体转换设备中的用于抑制链路中噪声干扰可编程噪声开关电路，上行方向，为了检测并抑制回传通路上引入的噪声，本发明优选实施例在4路上行链路中分别加了可编程衰减器。衰减器的衰减值软件可控，系统可以根据实际需要控制每一路的衰减值。
有线电缆媒体转换设备中的用于抑制链路中噪声干扰可编程噪声开关电路，上行方向，当四路中有任何一路因各种原因引入了噪声，干扰了正常的业务处理，软件控制衰减器，依次每一路的衰减值设置到最大，相当于关断此链路，检查干扰是否消除，若干扰依然存在，则说明不是此链路引入的干扰，软件重新配置衰减器的衰减值为0，打开此链路。若关断第N路时，干扰消除，则可确定是干扰是由第N路引入的。确定好是第几路引入的干扰后，保持此链路处于关断状态。等此路的干扰消除后，软件控制此链路衰减为0，重新打开此回传链路。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例该的方法。
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行上述实施例方法步骤的程序代码：
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行上述实施例的方法。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
基于本发明实施例提供的上述技术方案，各衰减器与终端的各上行链路连接，有线电缆数据服务接口规范DOCSIS业务处理模块与该衰减器连接；该DOCSIS业务处理模块配置该衰减器的衰减值，依次确定该各上行链路的每一路是否存在噪声干扰；该DOCSIS业务处理模块确定出存在噪声干扰的上行链路后，关闭该上行链路，解决了信号回传过程中引入了噪声干扰的问题，抑制了回传链路中噪声干扰。

Claims (12)

  1. 一种抑制噪声干扰的方法，包括：
    各衰减器与终端的各上行链路连接，有线电缆数据服务接口规范DOCSIS业务处理模块与所述衰减器连接；
    所述DOCSIS业务处理模块配置所述衰减器的衰减值，依次确定所述各上行链路的每一路是否存在噪声干扰；
    所述DOCSIS业务处理模块确定出存在噪声干扰的上行链路后，关闭所述上行链路。
  2. 根据权利要求1所述的方法，其中，依次确定所述各上行链路的每一路是否存在噪声干扰包括：
    依次对所述各上行链路的每一路的衰减器的衰减值设置到最大，上行链路的所述衰减值设置为最大指示为关断所述上行链路，检查噪声干扰是否消除；
    若所述噪声干扰依然存在，则指示不是所述上行链路引入了噪声干扰；
    若所述噪声干扰消失，则指示所述上行链路引入了噪声干扰。
  3. 根据权利要求2所述的方法，其中，在指示不是所述上行链路引入了噪声干扰情况下，所述方法包括：
    配置所述上行链路的衰减器的衰减值，开通所述上行链路。
  4. 根据权利要求1所述的方法，其中，关闭存在噪声干扰的所述上行链路后，所述方法包括：
    检测所述上行链路的噪声干扰是否消除，在消除的情况下，重新配置所述上行链路的衰减器的衰减值，开通所述上行链路。
  5. 根据权利要求1至权利要求4任一项所述的方法，其中，所述各上行链路包括以下至少之一：四路上行链路，三路上行链路，两路上行链路，一路上行链路。
  6. 根据权利要求5所述的方法，其中，所述方法还包括：
    所述各衰减器与定向耦合器连接，所述定向耦合器将低频数据信号混合为上行数据信号US，发送到所述DOCSIS业务处理模块。
  7. 一种抑制噪声干扰的装置，包括：衰减器和有线电缆数据服务接口规范DOCSIS业务处理模块；
    各所述衰减器与终端的各上行链路连接，所述DOCSIS业务处理模块与所述衰减器连接；
    所述DOCSIS业务处理模块配置所述衰减器的衰减值，用于依次确定所述各上行链路的每一路是否存在噪声干扰；
    在所述DOCSIS业务处理模块确定出存在噪声干扰的上行链路后的情况下，所述DOCSIS业务处理模块关闭所述上行链路。
  8. 根据权利要求7所述的装置，其中，包括：
    所述DOCSIS业务处理模块依次对所述各上行链路的每一路的衰减器的衰减值设置到最大，上行链路的所述衰减值设置为最大指示为关断所述上行链路，检查噪声干扰是否消除；
    若所述噪声干扰依然存在，则指示不是所述上行链路引入了噪声干扰；
    若所述噪声干扰消失，则指示所述上行链路引入了噪声干扰。
  9. 根据权利要求8所述的装置，其中，包括：
    在指示不是所述上行链路引入了噪声干扰情况下，所述DOCSIS业务处理模块配置所述上行链路的衰减器的衰减值，开通所述上行链路。
  10. 根据权利要求7所述的装置，其中，包括：
    所述DOCSIS业务处理模块检测所述上行链路的噪声干扰是否消除，在消除的情况下，所述DOCSIS业务处理模块重新配置所述上行链路的衰减器的衰减值，开通所述上行链路。
  11. 根据权利要求8至权利要求10任一项所述的装置，其中，所述各上行链路包括以下至少之一：四路上行链路，三路上行链路，两路上行链路，一路上行链路。
  12. 根据权利要求11所述的装置，其中，所述装置还包括：定向耦合器；
    各所述衰减器与所述定向耦合器连接，所述定向耦合器将低频数据信号混合为上行数据信号US，发送到所述DOCSIS业务处理模块。
PCT/CN2016/079320 2015-06-02 2016-04-14 抑制噪声干扰的方法及装置 WO2016192470A1 (zh)

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