WO2009094885A1 - Procédé et dispositif d'élimination de diaphonie - Google Patents

Procédé et dispositif d'élimination de diaphonie Download PDF

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Publication number
WO2009094885A1
WO2009094885A1 PCT/CN2008/073643 CN2008073643W WO2009094885A1 WO 2009094885 A1 WO2009094885 A1 WO 2009094885A1 CN 2008073643 W CN2008073643 W CN 2008073643W WO 2009094885 A1 WO2009094885 A1 WO 2009094885A1
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WIPO (PCT)
Prior art keywords
vdsl2
port
connection mode
power transmission
transmission template
Prior art date
Application number
PCT/CN2008/073643
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English (en)
French (fr)
Inventor
Jitao Li
Original Assignee
Zte Corporation
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Filing date
Publication date
Application filed by Zte Corporation filed Critical Zte Corporation
Publication of WO2009094885A1 publication Critical patent/WO2009094885A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058Allocation criteria
    • H04L5/0066Requirements on out-of-channel emissions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/02Details
    • H04B3/32Reducing cross-talk, e.g. by compensating
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M3/00Automatic or semi-automatic exchanges
    • H04M3/22Arrangements for supervision, monitoring or testing
    • H04M3/26Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • H04M3/302Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs
    • H04M3/304Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs and using xDSL modems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M3/00Automatic or semi-automatic exchanges
    • H04M3/22Arrangements for supervision, monitoring or testing
    • H04M3/26Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/34Testing for cross-talk

Definitions

  • the present invention relates to the field of communications, and in particular, to a second-generation ultra high-speed digital subscriber line (VDSL2) and an asymmetric digital subscriber line (Asymmetrical Digital Subscriber Line). It is abbreviated as ADSL).
  • VDSL2 second-generation ultra high-speed digital subscriber line
  • ADSL asymmetric digital subscriber line
  • xDSL Digital Subscriber Line
  • the ADSL/2/2+ terminal is connected to the central office (Centre Office, CO for short) through the connection (Line) 1.
  • Digital Subscriber Line Access Multiplexer (DSLAM) ADSL/2/2+
  • VDSL2 terminal connected to Remote (RT) DSLAM (VDSL2) via Line2
  • the ADSL/2/2+ terminal is connected to the RT DSLAM (VDSL2) via Line3. Since the new VDSL2 device can provide higher bandwidth in a short 3 macro (for example, within 1km), it is usually deployed close to it. User's place.
  • VDSL2 Voice over IP
  • the commonly used g-set ADSL2+ P ⁇ L ( Annex ) A ⁇ VDSL2 g has been set ( rofile ) 17a 12a Annex B 988 as an example, the downlink frequency band of ADSL2+ Annex A (138KHz to 2.2MHz) and VDSL2's DS2 band (138KHz to 3.75MHz) coincides.
  • ADSL2+ Annex A can achieve a maximum PSD of -40dBm in the downlink band, while VDSL2 profile 17a Annex B 988 has a PSD of only -60dBm in this band.
  • ADSL/2/2+ does not have such a mechanism to eliminate interference, so the application of ADSL/2/2+ of CO will inevitably be affected under such conditions.
  • VDSL2 port of the ADSL/2/2+ port to the RT-end DSLAM in the downstream direction and the ADSL/2/ of the CO-side DSLAM in the downstream direction when the VDSL2 device is applied to the RT.
  • the impact of the 2+ port is not limited to the present invention.
  • a crosstalk canceling method includes: Step S202: The remote VDSL2 device queries the connection mode of the port, and records the power control parameter of the port whose connection mode is VDSL2; Step S204, determines the corresponding power control parameter according to the recorded power control parameter. a power transmission template of the VDSL2 port; and step S206, setting a power transmission template of the port of the ADSL/2/2+ connection mode of the VDSL2 device according to the determined power transmission template of the VDSL2 port.
  • the power transmission template of the port with the connection mode of ADSL/2/2+ is set to be smaller than the power transmission template of the port with the connection mode of VDSL2.
  • the power transmission template of the port with the connection mode of ADSL/2/2+ is set to be smaller than the minimum power emission template of the multiple ports of the connection mode of VDSL2.
  • the connection mode of the port queried by the VDSL2 device includes: a connection after the port is established, and a connection mode specified by the network management system.
  • the power control parameter is the connection mode is The power control parameters of the power control function of the VDSL2 port setting.
  • a crosstalk canceling apparatus includes: a power control parameter recording module, configured to query a connection mode of a port of a remote VDSL2 device, and a power control parameter of a port of the VDSL2 connection mode; a power emission template determining module, Determining, according to the power control parameter recorded by the power control parameter recording module, a power transmission template of the corresponding VDSL2 port; and a power transmission template setting module, configured to set the connection according to the power transmission template of the VDSL2 port determined by the power transmission template determining module The power transmission template for the port of the ADSL/2/2+ mode.
  • the power transmission template setting module sets the power transmission template of the port with the connection mode of ADSL/2/2+ to be smaller than the power transmission template of the port with the connection mode of VDSL2. Moreover, in the case that the VDSL2 device has multiple ports with the connection mode of VDSL2, the power transmission template setting module sets the power transmission template of the port with the connection mode of ADSL/2/2+ to be smaller than the multiple ports of the connection mode of VDSL2. Minimum power emission template.
  • the connection mode of the port queried by the VDSL2 device includes: a connection mode after the port establishes a connection, and a connection mode specified by the network management system.
  • the power control parameter is the power control parameter of the power control function set in the port mode of the VDSL2.
  • the remote VDSL2 device queries the connection mode of the port, and the power connection parameter of the port of the VDSL2 is determined according to the recorded connection mode; and the power transmission template of the corresponding VDSL2 port is determined.
  • the problem of interference generated in the environment compatible with VDSL2 and ADSL has not been proposed yet, and the VDSL2 device can be compatible with ADSL/.
  • crosstalk is reduced to maintain frequency compatibility.
  • FIG. 1 is a schematic diagram of a processing scenario of a string 4 elimination method according to an embodiment of the method of the present invention
  • 2 is a flow chart of a crosstalk cancellation method in accordance with an embodiment of the method of the present invention
  • FIG. 3 is a block diagram of a crosstalk cancellation apparatus in accordance with an embodiment of the method of the present invention.
  • the present invention provides a crosstalk cancellation scheme for querying the connection mode of a port through a remote VDSL2 device, considering that the problem of interference generated in an environment compatible with VDSL2 and ADSL is not yet proposed. And according to the recorded connection mode, the power control parameter of the port of VDSL2; determining the power transmission template of the corresponding VDSL2 port, so as to set the power transmission template of the port of the ADSL/2/2+ connection mode of the VDSL2 device, When the VDSL2 device is compatible with ADSL/2/2+ user terminals, it reduces crosstalk and maintains compatibility.
  • a crosstalk canceling method is provided.
  • a crosstalk canceling method according to an embodiment of the present invention will be described below with reference to the accompanying drawings, and it is to be noted that the steps illustrated in the flowchart of the accompanying drawings may be executed in a computer system such as a set of computer executable instructions, and The logical order is shown in the flowchart, but in some cases the steps shown or described may be performed in a different order than the ones described herein.
  • the crosstalk cancellation method includes the following steps S202 to S206: Step S202, the remote VDSL2 device queries The connection mode of the port, and the power control parameter of the port whose connection mode is VDSL2 is recorded; in step S204, the power spectral density (PSD) of the corresponding VDSL2 port is determined according to the recorded power control parameter. a template; and step S206, setting a power transmission template of the port of the ADSL/2/2+ connection mode of the VDSL2 device according to the determined power transmission template of the VDSL2 port.
  • Step S202 the remote VDSL2 device queries The connection mode of the port, and the power control parameter of the port whose connection mode is VDSL2 is recorded
  • PSD power spectral density
  • the power transmission template of the port with the connection mode of ADSL/2/2+ can be set to be smaller than the terminal with the connection mode of VDSL2.
  • the power emission template of the mouth In the case that the VDSL2 device has multiple ports with the connection mode of VDSL2, the power transmission template of the port with the connection mode of ADSL/2/2+ can be set to be smaller than the minimum power transmission template of the multiple ports of the connection mode of VDSL2.
  • the connection mode of the port queried by the VDSL2 device may include, but is not limited to, a connection mode after the port establishes a connection, and a connection mode specified by the network management system.
  • the power control parameter described above is a power control parameter of a power control function (for example, a DPBO function) that is connected to a port of the VDSL2 mode.
  • Step 1 DSLAM port information query (ie, step S202 described above); specifically, the remote (RT end) VDSL2 device records the connection mode of each port (ie, the connection Type of terminal device;), the connection mode is the connection mode after each port establishes a connection, or it may be a connection mode specified by the network management, for example, designated as VDSL2 mode or ADSL/2/2+ mode; RT The VDSL2 device checks whether each VDSL2 port is configured with a DPBO function or the like; if yes, records the DPBO parameters; Step 2, ADSL/2/2+ spectrum adjustment (ie, step S204 and step S206 described above); Ground, according to the information obtained in step 1 (DPBO parameter), determine the minimum transmit PSD template of the VDSL2 port.
  • DPBO parameter determines the minimum transmit PSD template of the VDS
  • the ADSL/2/2+ PSD template should be below the minimum emitted PSD template.
  • the power transmission parameter of the VDSL2 port is determined according to the power control parameter of the VDSL2 port, and the connection mode of the VDSL2 device is set to the ADSL/2/2+ port.
  • the power emission template solves the problem that the interference generated in the environment compatible with VDSL2 and ADSL is not yet proposed, and the mutual crosstalk can be reduced when the VDSL2 device is compatible with the ADSL/2/2+ user terminal, thereby maintaining the frequency i General compatibility.
  • the specific implementation process of the embodiment of the present invention will be described in detail below by taking the scenario shown in FIG. 1 as an example.
  • connection 1 linel (connection 1) has a length of 3km, and line2 (connection 2) and line3 (connection 3) have a length of 800m.
  • Linel is the connection between the CO-side DSLAM and the ADSL/2/2+ user, and is configured as G.992.3 Annex A.
  • Connection 2 is the connection between the RT-side DSLAM and the VDSL2 user, and is configured as profile 17a Annex B 998.
  • Connection 3 is an RT-side DSLAM and an ADSL/2/2+ subscriber, G.992.3 Annex A.
  • the pairs used for the three connections are adjacent pairs, so there is crosstalk between each other from 138 kHz to 2.2 MHz. At this time, if the downlink PSD of connection 3 is not controlled, connection 1 and connection 2 may not be used normally.
  • step 1 is the connection between the CO-side DSLAM and the ADSL/2/2+ user, and is configured as G.992.3 Annex A.
  • connection 2 is the connection between the RT-side DSLAM and the VDS
  • RT-side DSLAM obtains connection 2 configuration rofile 17a Annex B 998 PSD template; RT-side DSLAM is obtained in order to avoid dry 4 especially connection 1, connection 2 must use DPBO, and
  • the RT-side DSLAM records the DPBO PSD template for the connection 2 configuration.
  • the RT-side DSLAM determines the PSD template of connection 3 according to the information of step 1, and the downlink transmission PSD of connection 3 cannot exceed the above determined PSD template (the PSD template of connection 2).
  • the PSD control for Control Connection 3 can use the custom PSD function. According to the template obtained from step 1, the template of the connection 3 is specified.
  • a processing method that can reduce the mutual string 4 when the VDSL2 device is compatible with the ADSL/2/2+ user terminal is provided.
  • Apparatus Embodiments According to an embodiment of the present invention, a crosstalk canceling apparatus is provided. 3 is a block diagram of a crosstalk canceling apparatus according to an embodiment of the present invention. As shown in FIG.
  • the crosstalk canceling apparatus includes: a power control parameter recording module 302, a power transmission template determining module 304, and a power transmission template setting.
  • Module 306 the above structure will be described below.
  • the power control parameter recording module 302 is configured to query a connection mode of a port of the remote VDSL2 device, and record a power control parameter of the port whose connection mode is VDSL2.
  • the power transmission template determining module 304 is connected to the power control parameter recording module 302.
  • the power transmission template setting module 306 is connected to the power transmission template determining module 304, for The power transmission template of the VDSL2 port determined by the power transmission template determination module 304 is used to set the power transmission template of the port of the ADSL/2/2+ connection mode.
  • the power transmission template setting module 306 can be configured to set the power transmission template of the port with the connection mode of ADSL/2/2+ to be smaller than the power transmission template of the port with the connection mode of VDSL2.
  • the power transmission template setting module 306 is further configured to set the power transmission template of the port with the connection mode of ADSL/2/2+ to be less than the connection in the case of the VDSL2 device having multiple ports with the connection mode of VDSL2.
  • the mode is the minimum power transmission template for multiple ports of VDSL2.
  • the connection mode of the port queried by the VDSL2 device includes: a connection mode after the port establishes a connection, and a connection mode specified by the network management system.
  • the power control parameter is the power control parameter of the power control function set in the port mode of the VDSL2.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed 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, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention.
  • the present invention can be variously modified and modified. Any modifications, equivalent substitutions, improvements, etc. made therein are intended to be included within the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
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Description

串扰消除方法及装置
技术领域 本发明涉及通信领域, 并且特别地, 涉及一种第二代超高速数字用户线 路 ( Very high bit-rate Digital Subscriber Line 2, 简称为 VDSL2 ) 与非对称数 字用户线路 ( Asymmetrical Digital Subscriber Line, 简称为 ADSL )兼容的环 境下的串 4尤消除方法及装置。 背景技术 目前, 最新兴起的 VDSL2是数字用户线路 ( Digital Subscriber Line, 简 称为 xDSL ) 技术的集大成者。 考虑到 ADSL/2/2+已经得到广泛的应用, 并 且 VDSL2的应用还在起步阶段, 因此, VDSL2的局端设备必须要兼容大量 存在的 ADSL/2/2+终端。 宽带接入网的部署趋势是逐步分散下移。 图 1示出了未来的部署模式, 如图 1所示, 在频段划分(Binder ) 的模 式下, ADSL/2/2+终端通过连接 (Line ) 1连接至中央机房 ( Centre Office, 简称为 CO ) 侧数字用户线路接入复用器 (Digital Subscriber Line Access Multiplexer, 简称为 DSLAM ) ( ADSL/2/2+ ), VDSL2终端通过 Line2连接至 远端 (Remote Terminal, 简称为 RT ) DSLAM ( VDSL2 ), ADSL/2/2+终端通 过 Line3连接至 RT DSLAM ( VDSL2 ), 由于新的 VDSL2设备在短 3巨离 (例 如, 1km以内) 可以提供更高的带宽, 因此, 通常会将其部署在靠近用户的 地方。 一方面, 会有接入新用户, 直接使用 VDSL2 业务; 另一方面, 在设 备覆盖的范围内也会有旧的 ADSL用户, 新的 VDSL2设备也必须兼容旧的 ADSL用户。因此, VDSL2的局端要能自动识别用户终端类型,以建立 ADSL 或者 VDSL2连接。 然而, 这种故法使得设备之间存在干扰。 具体地, 以这种模式下常用的 g己置 ADSL2+ P ^L ( Annex ) A ^ VDSL2 g己置 ( rofile ) 17a 12a Annex B 988为例, ADSL2+ Annex A的下行频段 ( 138KHz到 2.2MHz ) 和 VDSL2 的 DS2频段 ( 138KHz到 3.75MHz )重合, ADSL2+ Annex A在下行频段 PSD 最高可以达到 - 40dBm, 而 VDSL2 profile 17a Annex B 988在这个频段 PSD 最大只有 - 60dBm, 此时, 如果有两个端口分别接 ADSL和 VDSL2用户, 按照上述条件分别建立 ADSL2+和 VDSL2连接, 且两个用户线路是相邻线 对, 那么使用 ADSL2+的线路将对使用 VDSL2的线路将产生较大的干扰, 在干扰严重的情况下, 将会导致 VDSL2用户不能正常使用。 在上述情况下, 在 RT的 VDSL2业务可能对 CO侧的 ADSL/2/2+业务 产生很强的串扰。 当串扰严重时, 会使得 CO侧无法使用。 对于 VDSL2技 术, 可以使用下行功率限制 ( Downstream Power BackOff , 简称为 DPBO ) 来消除这种影响。 但是 ADSL/2/2+没有这种消除干扰的机制, 所以, 在这种 条件下必然影响 CO的 ADSL/2/2+的应用。 也就是说, 如果想保证所有终端 设备的终场使用, 就需要在 RT 应用 VDSL2 设备时解决下行方向上 ADSL/2/2+端口对 RT端 DSLAM的 VDSL2端口、 以及 CO端 DSLAM的 ADSL/2/2+端口的影响。 然而, 目前尚未提出能够消除这种干 ·ί尤的技术方案。 发明内容 考虑到目前无法消除 VDSL2与 ADSL兼容的环境下产生的干扰的问题 而提出本发明, 为此, 本发明的主要目的在于提供一种串扰消除机制, 以解 决上述问题至少之一。 为了实现上述目的,根据本发明的一个方面,提供了一种串扰消除方法。 根据本发明的串扰消除方法包括: 步骤 S202 , 远端 VDSL2设备查询其 端口的连接模式, 并记录连接模式为 VDSL2 的端口的功率控制参数; 步骤 S204, 才艮据记录的功率控制参数确定相应的 VDSL2端口的功率发射模板; 以及步骤 S206, 根据确定的 VDSL2端口的功率发射模板来设置 VDSL2设 备的连接模式为 ADSL/2/2+的端口的功率发射模板。 其中, 在步骤 S206中, 将连接模式为 ADSL/2/2+的端口的功率发射模 板设置为小于连接模式为 VDSL2的端口的功率发射模板。 并且, 在 VDSL2设备具有多个连接模式为 VDSL2的端口的情况下, 将连接模式为 ADSL/2/2+的端口的功率发射模板设置为小于连接模式为 VDSL2的多个端口的最小功率发射模板。 it匕外, VDSL2设备查询的端口的连接模式包括: 端口建立连接后的连 式、 由网络管理系统指定的连接模式。 功率控制参数是连接模式为 VDSL2的端口设置的功率控制功能的功率控制参数。 为了实现上述目的, 根据本发明的另一个方面, 提供了一种串扰消除装 置。 根据本发明的串扰消除装置包括: 功率控制参数记录模块, 用于查询远 端 VDSL2设备的端口的连接模式, 并 i己录连接模式为 VDSL2的端口的功率 控制参数; 功率发射模板确定模块, 用于根据由功率控制参数记录模块记录 的功率控制参数确定相应的 VDSL2端口的功率发射模板; 以及功率发射模 板设置模块, 用于根据由功率发射模板确定模块确定的 VDSL2 端口的功率 发射模板来设置连接模式为 ADSL/2/2+的端口的功率发射模板。 其中,功率发射模板设置模块将连接模式为 ADSL/2/2+的端口的功率发 射模板设置为小于连接模式为 VDSL2的端口的功率发射模板。 并且, 在 VDSL2设备具有多个连接模式为 VDSL2的端口的情况下, 功率发射模板设置模块将连接模式为 ADSL/2/2+的端口的功率发射模板设置 为小于连接模式为 VDSL2的多个端口的最小功率发射模板。 另外, VDSL2设备查询的端口的连接模式包括: 端口建立连接后的连 接模式、 由网络管理系统指定的连接模式。 功率控制参数是连接模式为 VDSL2的端口设置的功率控制功能的功率控制参数。 借助于本发明的上述技术方案至少之一, 通过远端 VDSL2设备查询其 端口的连接模式, 并才艮据记录的连接模式为 VDSL2的端口的功率控制参数; 确定相应的 VDSL2端口的功率发射模板,以便设置 VDSL2设备的连接模式 为 ADSL/2/2+的端口的功率发射模板,解决了目前尚未提出能够消除 VDSL2 与 ADSL 兼容的环境下所产生的干扰的问题, 能够在 VDSL2 设备兼容 ADSL/2/2+用户终端时, 减小相互的串扰, 从而保持频傳兼容性。 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是才艮据本发明方法实施例的串 4尤消除方法的处理场景的示意图; 图 2是根据本发明方法实施例的串扰消除方法的流程图; 以及 图 3是根据本发明方法实施例的串扰消除装置的框图。 具体实施方式 功能相无述 考虑到目前尚未提出能够消除 VDSL2与 ADSL兼容的环境下所产生的 干扰的问题, 本发明提供了一种串扰消除方案, 通过远端 VDSL2设备查询 其端口的连接模式, 并才艮据记录的连接模式为 VDSL2 的端口的功率控制参 数; 确定相应的 VDSL2端口的功率发射模板, 以便设置 VDSL2设备的连接 模式为 ADSL/2/2+的端口的功率发射模板, 能够在 VDSL2 设备兼容 ADSL/2/2+用户终端时, 减小相互的串扰, 从而保持频 i普兼容性。 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。 下面将参考附图并结合实施例来详细说明本发明。 方法实施例 才艮据本发明的实施例, 提供了一种串扰消除方法。 以下将结合附图来描 述根据本发明实施例的串扰消除方法, 需要说明的是, 在附图的流程图示出 的步骤可以在诸如一组计算机可执行指令的计算机系统中执行, 并且, 虽然 在流程图中示出了逻辑顺序, 但是在某些情况下, 可以以不同于此处的顺序 执行所示出或描述的步骤。 图 2是根据本发明方法实施例的串扰消除方法的流程图, 如图 2所示, 才艮据本实施例的串扰消除方法包括如下的步骤 S202至步骤 S206: 步骤 S202, 远端 VDSL2设备查询其端口的连接模式, 并记录连接模式 为 VDSL2的端口的功率控制参数; 步骤 S204,才艮据记录的功率控制参数确定相应的 VDSL2端口的功率光 i普密度 (Power Spectral Density, 简称为 PSD )模板; 以及 步骤 S206 , 根据确定的 VDSL2端口的功率发射模板来设置 VDSL2设 备的连接模式为 ADSL/2/2+的端口的功率发射模板。 优选地, 可以将连接模 式为 ADSL/2/2+的端口的功率发射模板设置为小于连接模式为 VDSL2的端 口的功率发射模板。 在 VDSL2设备具有多个连接模式为 VDSL2的端口的情况下, 可以将 连接模式为 ADSL/2/2+的端口的功率发射模板设置为小于连接模式为 VDSL2的多个端口的最小功率发射模板。 此外, 上述的 VDSL2设备查询的端口的连接模式可以包括但不限于: 端口建立连接后的连接模式、 由网络管理系统指定的连接模式。 上述的功率 控制参数是连接模式为 VDSL2 的端口设置的功率控制功能 (例如, DPBO 功能) 的功率控制参数。 在实际应用时, 可以通过如下步骤来实现: 步骤 1 , DSLAM端口信息查询 (即, 上述的步骤 S202 ); 具体地, 远端 ( RT端) VDSL2设备记录每个端口的连接模式(即, 连 接的终端设备的类型;),该连接模式是每个端口建立连接后的连接模式,或者, 也可以是通过网管指定的连接模式, 例如, 指定为 VDSL2 模式或者 ADSL/2/2+模式; RT端 VDSL2设备检查每个 VDSL2端口是否配置了 DPBO功能或者类 似功能; 如果是, 就记录 DPBO参数; 步骤 2, ADSL/2/2+的频谱调整 (即, 上述的步骤 S204和步骤 S206 ); 具体地, 根据步骤 1得到的信息( DPBO参数), 确定 VDSL2端口的最 小发射 PSD模版。 ADSL/2/2+的 PSD模版应该在低于被确定的最小发射 PSD 模版。 通过该实施例, 才艮据查询并记录的连接模式为 VDSL2的端口的功率控 制参数, 确定相应的 VDSL2端口的功率发射模板, 以便设置 VDSL2设备的 连接模式为 ADSL/2/2+的端口的功率发射模板, 解决了目前尚未提出能够消 除 VDSL2与 ADSL兼容的环境下所产生的干扰的问题,能够在 VDSL2设备 兼容 ADSL/2/2+用户终端时, 减小相互的串扰, 从而保持频 i普兼容性。 实例 下面将以图 1所示的场景为例详细描述本发明实施例的具体实现过程。 在图 1 中, 假设 linel (连接 1 ) 长度为 3km, line2 (连接 2 ) 和 line3 (连接 3 )的长度为 800m。 linel是 CO端 DSLAM与 ADSL/2/2+用户的连接, 配置为 G.992.3 Annex A。 连接 2是 RT端 DSLAM与 VDSL2用户的连接, 配置为 profile 17a Annex B 998。连接 3是 RT端 DSLAM与 ADSL/2/2+用户, G.992.3 Annex A。 3个连接使用的线对是相邻线对,因此在 138KHz到 2.2MHz 内彼此会有串扰。 此时, 如果不控制连接 3的下行 PSD , 那么连接 1和连接 2可能不能正常使用。 步骤 1 :
RT端 DSLAM获得连接 2的配置 rofile 17a Annex B 998的 PSD模版; RT端 DSLAM获得为了避免干 4尤连接 1 , 连接 2必须使用 DPBO, 并
RT端 DSLAM记录连接 2配置的 DPBO PSD模版。 步骤 2:
RT端 DSLAM根据步骤 1的信息, 确定连接 3的 PSD模版, 连接 3的 下行发射 PSD, 不能超过上述确定的 PSD模版(连接 2的 PSD模版)。 控制 连接 3的 PSD控制可以釆用 custom PSD功能。根据从步骤 1中获得的模版, 来为指定连接 3的模版。 通过该实施例, 提供了在 VDSL2设备兼容 ADSL/2/2+用户终端时, 可 以减小相互的串 4尤的处理方法。 装置实施例 才艮据本发明的实施例, 提供了一种串扰消除装置。 图 3是根据本发明方法实施例的串扰消除装置的框图, 如图 3所示, 根 据本实施例的串扰消除装置包括: 功率控制参数记录模块 302、 功率发射模 板确定模块 304、 功率发射模板设置模块 306, 下面对上述结构进行描述。 功率控制参数记录模块 302, 用于查询远端 VDSL2设备的端口的连接 模式, 并记录连接模式为 VDSL2 的端口的功率控制参数; 功率发射模板确 定模块 304, 连接至功率控制参数记录模块 302, 用于根据由功率控制参数 记录模块 302记录的功率控制参数确定相应的 VDSL2端口的功率发射模板; 功率发射模板设置模块 306, 连接至功率发射模板确定模块 304, 用于根据 由功率发射模板确定模块 304确定的 VDSL2端口的功率发射模板来设置连 接模式为 ADSL/2/2+的端口的功率发射模板。 优选地, 功率发射模板设置模 块 306可以用于将连接模式为 ADSL/2/2+的端口的功率发射模板设置为小于 连接模式为 VDSL2的端口的功率发射模板。 进一步地, 功率发射模板设置模块 306还用于将在 VDSL2设备具有多 个连接模式为 VDSL2的端口的' It况下, 连接模式为 ADSL/2/2+的端口的功 率发射模板设置为小于连接模式为 VDSL2的多个端口的最小功率发射模板。 其中, VDSL2设备查询的端口的连接模式包括: 端口建立连接后的连 接模式、 由网络管理系统指定的连接模式。 功率控制参数是连接模式为 VDSL2的端口设置的功率控制功能的功率控制参数。 综上所述, 借助于本发明的技术方案, 能够在 VDSL2 设备兼容 ADSL/2/2+用户终端时, 减小相互的串扰, 从而保持频傳兼容性。 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, 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^^ 凡在本发明的^^申和 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。

Claims

权 利 要 求 书
1. 一种串扰消除方法, 用于第二代超高速数字用户线路 VDSL2 与非对称 数字用户线路 ADSL兼容的环境, 其特征在于, 所述方法包括:
步骤 S202, 远端 VDSL2设备查询其端口的连接模式, 并记录连接 模式为 VDSL2的端口的功率控制参数;
步骤 S204,根据记录的所述功率控制参数确定相应的 VDSL2端口 的功率发射模板; 以及
步骤 S206, 根据确定的 VDSL2 端口的功率发射模板来设置所述 VDSL2设备的连接模式为 ADSL/2/2+的端口的功率发射模板。
2. 根据权利要求 1 所述的串扰消除方法, 其特征在于, 在所述步骤 S206 中, 将所述连接模式为 ADSL/2/2+的端口的功率发射模板设置为小于所 述连接模式为 VDSL2的端口的功率发射模板。
3. 根据权利要求 2所述的串扰消除方法, 其特征在于, 在所述 VDSL2设 备具有多个连接模式为 VDSL2 的端口的情况下, 将所述连接模式为 ADSL/2/2+的端口的功率发射模板设置为小于所述连接模式为 VDSL2 的多个端口的最小功率发射模板。
4. 根据权利要求 1至 3中任一项所述的串扰消除方法, 其特征在于, 所述 VDSL2设备查询的端口的连接模式包括: 所述端口建立连接后的连接模 式、 由网络管理系统指定的连接模式。
5. 根据权利要求 1至 3中任一项所述的串扰消除方法, 其特征在于, 所述 功率控制参数是所述连接模式为 VDSL2 的端口设置的功率控制功能的 功率控制参数。
6. 一种串扰消除装置, 用于 VDSL2与 ADSL兼容的环境, 其特征在于, 所述装置包括:
功率控制参数记录模块, 用于查询远端 VDSL2设备的端口的连接 模式, 并记录连接模式为 VDSL2的端口的功率控制参数;
功率发射模板确定模块,用于根据由所述功率控制参数记录模块记 录的所述功率控制参数确定相应的 VDSL2端口的功率发射模板; 以及 功率发射模板设置模块,用于根据由所述功率发射模板确定模块确 定的 VDSL2端口的功率发射模板来设置连接模式为 ADSL/2/2+的端口 的功率发射模板。
7. 根据权利要求 6所述的串扰消除装置, 其特征在于, 所述功率发射模板 设置模块用于将所述连接模式为 ADSL/2/2+的端口的功率发射模板设置 为小于所述连接模式为 VDSL2的端口的功率发射模板。
8. 根据权利要求 7所述的串扰消除装置, 其特征在于, 所述功率发射模板 设置模块还用于: 在所述 VDSL2设备具有多个连接模式为 VDSL2的端 口的情况下, 将所述连接模式为 ADSL/2/2+的端口的功率发射模板设置 为小于所述连接模式为 VDSL2的多个端口的最小功率发射模板。
9. 根据权利要求 6至 8中任一项所述的串扰消除装置, 其特征在于, 所述 VDSL2设备查询的端口的连接模式包括: 所述端口建立连接后的连接模 式、 由网络管理系统指定的连接模式。
10. 根据权利要求 6至 8中任一项所述的串扰消除装置, 其特征在于, 所述 功率控制参数是所述连接模式为 VDSL2 的端口设置的功率控制功能的 功率控制参数。
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