CN100563116C - Method and system for signal transmitting by using second high-speed digital user wire - Google Patents

Method and system for signal transmitting by using second high-speed digital user wire Download PDF

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CN100563116C
CN100563116C CN 200610111491 CN200610111491A CN100563116C CN 100563116 C CN100563116 C CN 100563116C CN 200610111491 CN200610111491 CN 200610111491 CN 200610111491 A CN200610111491 A CN 200610111491A CN 100563116 C CN100563116 C CN 100563116C
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rate
downlink
uplink
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point
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CN1909392A (en
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温运生
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华为技术有限公司
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Abstract

本发明公开了一种利用第二代甚高速数字用户线传输信号的方法,该方法启用VDSL2的US0上行频段,并使US0上行频段的上限与DS1下行频段的下限重合;根据实时测量的传输信号实际的上行速率和下行速率与期望的上行速率和下行速率的比较结果调整US0上行频段上限与DS1下行频段下限的重合点。 The present invention discloses a method of using the second generation of very high speed digital subscriber line transmitting a signal, the method enabled uplink frequency band US0 of VDSL2, and the uplink frequency band US0 upper and the lower limit coincides with the downlink frequency band DS1; measured according to a transmission signal in real time comparison of the actual rate of uplink and downlink with the desired rate of uplink and downlink with the upper limit of the uplink frequency band US0 adjusting downlink frequency band DS1 and the lower limit coincides with the point. 本发明还公开了一种利用第二代甚高速数字用户线传输信号的系统,包括:重合点设定装置,用于设定VDSL2的US0上行频段的上限与DS1下行频段的下限的重合点的初始频点值;重合点调整装置,用于根据VDSL2上传输信号的上行速率和下行速率的要求调重合点。 The present invention also discloses a system for generation of a second very high speed digital subscriber line transmission signal to be used, comprising: a coincidence point setting means for setting an uplink band US0 VDSL2 lower limit coincides with the point of the upper limit of the downlink frequency band DS1 the initial frequency value; coincidence point adjusting means in accordance with the requirements for rate of uplink and downlink with a transmission signal on a coincident point VDSL2 tone. 利用本发明,可以有效地提高VDSL2在高速率传输时的环路距离。 With the present invention, it can improve the high rate VDSL2 loop transmission distance.

Description

利用第二代甚高速数字用户线传输信号的方法及系统 Using the second generation of Very High Speed ​​Digital Subscriber Line Method and system for transmitting signals

技术领域 FIELD

本发明涉及网络传输技术领域,具体涉及一种利用第二代甚高速数字用户线传输信号的方法及系统。 Technical Field The present invention relates to a transmission network, particularly relates to a method and system for the second generation of very high speed digital subscriber line transmission signal to be used.

背景技术 Background technique

xDSL (xDigital Subscriber Line,各种数字用户线的统称)技术经过多年的发展,已经从第一代的ADSL发展到现在的第二代的ADSL2、 ADSL2+以及更新的VDSL2 ( Very-high-bit-rate DSL 2,第二代甚高速数字用户线),其使用的频带在逐渐增加,相应的带宽也在逐渐增加。 xDSL (xDigital Subscriber Line, various digital subscriber line collectively) technology After years of development, has been developed from the first generation ADSL to the current second generation ADSL2, ADSL2 + and updating of VDSL2 (Very-high-bit-rate DSL 2, the second generation of very High Speed ​​digital Subscriber line), which is used in a frequency band gradually increases corresponding bandwidth is also increasing. ADSL和ADSL2下行使用1. lMHz以下的频语能够提供最大8Mbps的下行速率,ADSL2+将下行带宽扩展到2.2MHz,能够提供最大24Mbps的下行速率。 ADSL and ADSL2 downlink using the pilot 1. lMHz language can provide maximum downstream speed of 8Mbps, ADSL2 + bandwidth extension to the downlink 2.2MHz, capable of providing the maximum downstream rate of 24Mbps.

VDSL2是最新也是最先进的xDSL宽带线缆通信标准。 VDSL2 is the newest and most advanced standard of xDSL broadband cable communication. VDSL2支持语音、 视频、数据、HDTV ( High Definition Television,高清晰度电视)和互动游戏等业务的广泛部署,可以帮助使用者和运营商逐步、灵活和节省成本地升级现有的xDSL基础架构。 Widespread deployment of VDSL2 support voice, video, data, HDTV (High Definition Television, HDTV) and interactive games and other services that can help users and carriers to gradually, flexibly and cost-effectively upgrade existing xDSL infrastructure. VDSL2甚至使用高达30MHz的频谱,能够提供最高上下行对称1 OOMbps的速率。 Even using VDSL2 frequency spectrum of up to 30MHz, provides symmetric uplink and downlink rate of up to 1 OOMbps of.

为此,业界适时开发和标准化了VDSL2技术。 To this end, the industry and the timely development of standardized VDSL2 technology. 与其他几种DSL允许选择离散多音调(DMT)或正交幅度调制(QAM)技术不同,VDSL2只能使用DMT 线路编码。 And several other DSL allows selection of a discrete multitone (DMT) or quadrature amplitude modulation (QAM) different technologies, VDSL2 use only DMT line coding. DMT是一种分割DSL信号的方法,有用的频率范围被划分成多个小的频段。 DMT is a method of dividing the DSL signals, the useful frequency range is divided into a plurality of small bands. 最多可以分成4096个频段,各频段的间距为4kHz或8kHz。 4096 can be divided into a maximum band spacing of the band is 4kHz or 8kHz. 其中每个频段都可以用作下行或上行传输。 Wherein each frequency band can be used as a downlink or uplink transmission.

在VDSL2标准G .993.2中定义的VDSL2信道的频谱如图1所示: VDSL2 VDSL2 standard spectrum G .993.2 channel defined in Figure 1:

其中,USX表示上行信道的频谱,DSX表示下行信道的频谱。 Wherein, USX represents the frequency spectrum of the uplink channel, DSX represents the downlink channel spectrum. 图1中的各个频率值在G .993.2中定义如下表1所示: Respective frequency values ​​defined in FIG. 1 G .993.2 shown below in Table 1:

表1:<table>table see original document page 7</column></row> <table> Table 1: <table> table see original document page 7 </ column> </ row> <table>

由于用户线上的信号与线路的长度、信号频率成指数衰减的关系。 Since the signal line and the subscriber line length, the relationship between the signal frequency into a exponential decay. 用户线 Subscriber line

越长,高频信号衰减越大。 The longer, the greater the high frequency signal attenuation. 所以在现有技术中,VDSL2在高速率传输时的环路距离通常在一千米以内。 Therefore, in the prior art, VDSL2 loop at high-speed transmission distance is usually less than one thousand meters. 在实际应用中,VDSL2的前端设备必须靠近用户, 且一般与FTTC( Fiber To The Curb,光纤到路边)、FTTB( Fiber To The Building, 光纤到楼)等技术等结合使用。 In practice, the front end of the device near the user must VDSL2, and generally with FTTC (Fiber To The Curb, Fiber to the Curb), using FTTB (Fiber To The Building, fiber to the building) and other binding techniques. 当用户线足够长,以至上行频谱内的信号幅度衰减到接收端的检测门限以下,就出现VDSL2不能使用的问题。 When the subscriber line is long enough, the amplitude of the signal in the spectrum is attenuated to the detection threshold as well as the receiving end up, on VDSL2 problems can not be used.

比如,根据双绞线的经验公式,计算出型号为AWG26的线缆在2.5公里长度的衰减结果如图2所示: For example, according to the empirical formula UTP calculated model AWG26 cable attenuation of 2.5 kilometers in length shown in Figure 2:

假设采用表1中的998频谱划分方案。 Suppose 998 spectrum allocation scheme using Table 1. 即fl-276K, f2 = 3.75MHz, US0 不使用。 I.e. fl-276K, f2 = 3.75MHz, US0 not used. 接收机的最小接收门限是-95dBmO。 The minimum threshold of the receiver is receiving -95dBmO.

由图中可见,当频率为2.576Mhz时,接收信号达到-95dBmO。 It is seen from the figure, when the frequency of 2.576Mhz, the received signal reaches -95dBmO.

根据以上的条件,下行的有效带宽为2.576-0.276 = 2.3Mfe,而上行的带宽为0。 According to the above conditions, the effective bandwidth of the downlink 2.576-0.276 = 2.3Mfe, the upstream bandwidth is zero. 因无上行通道,通信不能使用。 In the absence of the uplink channel, communication can not be used. 此时的频谱如图3所示。 At this time, the spectrum shown in Fig. 发明内容 SUMMARY

本发明的目的是提供一种利用第二代甚高速数字用户线传输信号的方法, Object of the present invention is to provide a second-generation Very High Speed ​​Digital Subscriber Line transmission signal using the method,

以解决VDSL2在长距离用户上使用的问题,提高VDSL2在高速率传输时的环路距离。 VDSL2 used to solve problems in the long-distance users, improving VDSL2 loop at high rates of transmission distance.

本发明的另一个目的是提供一种利用第二代甚高速数字用户线传输信号的系统,提高VDSL2在高速率传输时的环路距离。 Another object of the present invention is to provide a system of the second generation digital subscriber line transmission signal using a very high-speed, enhance VDSL2 loop at high-speed transmission distance. 为此,本发明提供如下的技术方案: To this end, the present invention provides the following technical solution:

一种利用第二代甚高速数字用卢线传输信号的方法,所述方法包括: 启用第二代甚高速数字用户线VDSL2的US0上行频段,并使US0上行 Utilizing the second generation method for Very High Speed ​​Digital LU line transmission signal, the method comprising: enabling the second generation of Very High Speed ​​Digital Subscriber Line VDSL2 US0 the uplink frequency, and an uplink US0

频段的上限与DS1下行频段的下限重合; Band downlink frequency band DS1 upper and lower limit of coincidence;

根据实时测量的传输信号实际的上行速率和下行速率与期望的上行速率 The transmission signal measured in real time the actual uplink and downlink with the desired rate of uplink rate

和下行速率的比较结果要求调整USO上行频段上限与DS1下行频段下限的重 Downlink rate and readjusting the frequency comparison result in claim upper and lower limit of the frequency band DS1 uplink downlink USO

合点。 The binding point. . .

优选地,设定所述重合点的初始值为标准中频谱划分的DS1下行频段的下限值。 Preferably, the lower limit coincides with the set initial value of the standard point in the spectrum is divided downstream band DS1.

所述根据实时测量的传输信号实际的上行速率和下行速率与期望的上行速率和下行速率的比较结果调整USO上行频段上限与DS1下行频段下限的重合点的步骤包括: The step of adjusting the point coincident with the uplink frequency band USO upper limit of the downlink frequency band DS1 based on the comparison result of the transmission signal measured in real time the actual rate of uplink and downlink with the uplink and downlink with a desired rate comprises:

确定在所述重合点取初始值时VDSL2上传输信号期望的上行速率和下行速率; A transmission signal determining a desired rate on the uplink and downlink with VDSL2 when the coincident point to take an initial value;

实时测量在VDSL2上传输信号实际的上行速率和下行速率; 当所述实际的上行速率和下行速率未达到期望的上行速率和下行速率时, 调整所述重合点。 Real-time measurement of the actual rate of uplink and downlink with a transmission signal on VDSL2; when the uplink and downlink with the actual speed does not reach a desired speed downlink and uplink rate, adjusting the coincidence point.

所述确定在所述重合点取初始值时VDSL2上传输信号期望的上行速率和下行速率的步骤包括: The step of determining a desired transmission signal rate of uplink and downlink with the VDSL2 the coincident points included in the initial value taken:

测量在所述重合点取初始值时VDSL2上各频段内每个子载波的信噪比; 根据所述信噪比确定各频段的比特加载表;根据所述比特加载表计算VDSL2上传输信号期望的上行速率和下行速率。 Measuring the SNR of each subcarrier in each frequency band when the coincident point on VDSL2 takes an initial value; determining the SNR of each frequency band in accordance with bit-loading table; computing VDSL2 transmission signal according to the desired bit-loading table uplink and the downlink speeds.

所述根据信噪比确定各频段的比特加载表的步骤包括: The signal to noise ratio is determined for each frequency band bit-loading table comprises:

利用公式<formula>formula see original document page 9</formula>计算各频段内的每个子载波能加载的比特数, Using the formula <formula> formula see original document page 9 </ formula> calculates the number of bits per subcarrier in each frequency band can be loaded,

其中,i为频4殳内子载波的编号, Wherein, i is the subcarrier frequency 4 Shu number,

bi为第i个子载波加载的比特数, bi is the i-th sub-carrier number of bits loaded,

(S/N) i为笫i个子载波加载测得的信噪比, (S / N) i Zi is the i th subcarrier SNR measured load,

w为每个子载波的带宽; w is the bandwidth of each subcarrier;

根据计算得到的比特数确定各频段的加载比特表。 Determining loading of each band bit table the number of bits calculated. 所述调整所述重合点的步骤包括: The adjustment of the coincident points comprises:

当实际的下行速率大于期望的下行速率,并且实际的上行速率小于期望的上行速率时,将所述的重合点向频率高的方向移动; When the actual downstream speed greater than the desired downlink rate, and the actual upstream rate less than the desired rate of the uplink, the coincidence is shifted to the high point of the frequency direction;

当实际的下行速率小于期望的下行速率,并且实际的上行速率大于期望的上行速率时,将所述的重合点向频率低的方向移动; When the actual rate is less than the desired downlink downlink rate, and the actual upstream rate greater than the desired rate of the uplink, the coincident point is moved to the lower frequency direction;

当实际的下4亍速率等于期望的下行速率,并且实际的上行速率大于期望的上行速率时,4艮据运营商要求调整所述重合点。 When the actual upstream rate is equal to the desired rate of 4 right foot downlink rate, and the actual upstream rate is greater than desired, the operator according to claim 4 Gen adjusting the coincident points.

所述根据运营商要求调整所述重合点的步骤包括: According to operator requirements the step of adjusting said coincident point comprises:

不调整所述重合点,并在保证下行速率满足要求的前提下,提供最大的上行速率;或者 The adjustment is not coincident points, and while ensuring the downlink rate to meet the requirements, to provide maximum uplink rate; or

调整所述重合点,使上行速率最大化,或使下行速率最大化,或使上行速率和下行速率都最大化。 Adjusting the coincident points, maximizing the rate for uplink, downlink or to maximize the rate of, or to both uplink and the downlink speeds maximized.

所述调整所述重合点,使上行速率和下行速率都最大化的步骤包括: Said step of adjusting said coincident point, so that the rate of uplink and downlink with maximized comprises:

根据上行比特加载表和下行比特加载表重新确定所述重合点。 Table downlink bit-loading table, and re-determining the bit loading coincident point according to the uplink.

所述方法还包括: The method further comprising:

如果实际的上行速率小于期望的上行速率,并且实际的下行速率小于期望的下行速率,则发送告警消息。 If the actual rate is less than the desired uplink uplink rate, and the actual downstream rate is less than the desired downlink rate, an alarm message is sent.

所述方法还包括: The method further comprising:

局端将调整后的重合点的值通过专用测试信道传送给远端的调制解调器。 ATU value coincident points of the adjusted transmission to the remote modem through a dedicated test channel. 一种利用第二代甚高速数字用户钱传输信号的系统,所述系统启用第二代 Money system users transmitting signals utilizing the second generation of very high-speed digital, the second-generation systems enable

甚高速数字用户线(VDSL2)的US0上行频段,所述系统包括: Very High Speed ​​Digital Subscriber Line (VDSL2) is an uplink frequency band US0, the system comprising:

重合点设定装置,用于设定第二代甚高速数字用户线VDSL2的US0上行 Coincident point setting means for setting a second-generation Very High Speed ​​Digital Subscriber Line VDSL2 upstream of US0

频段的上限与DS1下行频段的下限的重合点的初始频点值; The initial value of the frequency band coincident points lower limit and the upper limit of the frequency band DS1 downlink;

重合点调整装置,用于根据实时测量的传输信号实际的上行速率和下行速 Coincidence point adjustment means for transmitting signals measured in real time according to the actual uplink and downlink with speed

率与期望的上行速率和下行速率的比较结果调整所述重合点。 Comparison with the desired rate of uplink and downlink with adjusting the rate of coincident points. 所述系统还包括: Said system further comprising:

期望速率确定装置,与所述重合点设定装置相连,用于确定在所述重合点取初始值时VDSL2上传输信号期望的上行速率和下行速率,并将确定的期望速率传送给所述重合点调整装置。 Desired rate determining means coincides with the point setting means is connected to a transmission signal for determining a desired rate on the uplink and downlink with VDSL2 when the coincident point to take an initial value and the determined transmission rate to the desired overlap point adjustment means.

所述期望速率确定装置包括: The desired rate determining means comprises:

信噪比测量单元,用于测量在所述重合点取初始值时VDSL2上各频段内每个子载波的信噪比; SNR measuring unit for measuring a signal to noise ratio for each sub-carrier within each band on VDSL2 when the coincident point to take an initial value;

期望速率计算单元,用于根据所述信噪比计算VDSL2上传输信号期望的上行速率和下行速率。 Desired rate calculation unit for calculating the rate of uplink and downlink with the VDSL2 transmission signal based on the desired signal to noise ratio.

所述重合点调整装置包括: The coincident point adjusting means comprises:

实际速率测量单元,用于实时测量在VDSL2上传输信号实际的上行速率和下行速率; The actual rate measurement unit for measuring the real time actual rate of uplink and downlink with a transmission signal on VDSL2;

比较单元,用于比较所述实际速率测量单元测量到的实际的上行速率和下行速率与所述期望速率确定装置确定的期望的上行速率和下行速率; A comparison unit for an actual uplink and downlink with comparing the actual rate measuring unit measures the rate of the uplink and downlink with a desired rate determining means determines the desired rate;

调整执行单元,与所述重合点设置装置相连,用于根据所述比较单元的比较结果调整所述重合点。 Adjustment execution unit, coincides with the point setting means is connected for adjusting the coincident point according to the comparison result of the comparing unit.

所述重合点调整装置还包括:调整策略设置单元,与所述调整执行单元相连,用于设定调整执行单元对重合点调整所需的调整策略。 The coincident point adjusting apparatus further comprising: adjusting the policy setting unit, connected to the adjustment executing unit configured to perform setting adjustment means to adjust the desired adjustment strategy coincident points.

由以上本发明提供的技术方案可以看出,本发明通过启用VDSL2频谱中的US0频段作为上行信道,提供了VDSL2在长距离用户线上的上行信号通道; 并且使US0频段的上限与DS1频段的下限重合,充分利用了VDSL2的频镨资源。 Provided by the above aspect of the present invention can be seen, the present invention is enabled by VDSL2 spectrum channel as an uplink frequency band US0, VDSL2 uplink signal path is provided for long distance subscriber lines; and the upper limit of the frequency band US0 band DS1 the lower limit of overlap, full use of the resources of VDSL2 frequency Pr. 同时,根据上、下行速率的要求调整USO频段上限与DS1频段下限的重合点,从而可以得到期望的上、下行信道的速率,有效地提高了VDSL2在高速率传输时的环路距离。 Meanwhile, adjusted according to requirements, speed downlink frequency band DS1 point coincides with the upper limit of the frequency band USO lower limit, so that the desired rate downlink channel can be effectively improved loop transmission distance at a high rate VDSL2.

附图说明 BRIEF DESCRIPTION

图1是现有VDSL2标准993.2中定义的VDSL2信道的频谱图; FIG 1 is a spectrogram of a conventional VDSL2 channel defined in the VDSL2 standard 993.2;

图2是现有型号为AWG26的线缆在2.5公里长度的衰减示意图; FIG 2 is a conventional schematic model AWG26 cable attenuation length of 2.5 kilometers;

图3是长距离用户线上VDSL2的频谱图; FIG 3 is a long distance of the subscriber line VDSL2 spectrum;

图4是本发明方法一个优选实施例的实现流程图; FIG 4 is a flow chart for implementing the method according to the present invention, a preferred embodiment of the embodiment;

图5是本发明中对应的VDSL2的频谱图; FIG. 5 is a spectrum that corresponds to the present invention of FIG VDSL2;

图6是本发明中调整重合点、减少DS1的频谱的示意图; FIG 6 is a schematic view of the present invention to adjust the coincident point, the reduction of the frequency spectrum of the DS1;

图7是本发明中调整重合点、增加DS1的频谱的示意图; 7 is a schematic of the present invention to adjust the coincident point, an increase in the frequency spectrum of the DS1;

图8是本发明系统的一个优选实施例的原理框图。 FIG 8 is a schematic diagram of an embodiment of a system according to the present invention preferably.

具体实施方式 Detailed ways

本发明的核心在于启用VDSL2频镨中的US0频段作为上行信道,并且使US0频段的上限与DS1频段的下限重合,在进行信号传输时,根据VDSL2上传输信号的上行速率和下行速率的要求实时调整US0频段上限与DS1频段下限的重合点,使VDSL2的上、下行信道的速率尽可能达到期望的速率值。 The core of the present invention is to enable VDSL2 frequency praseodymium US0 band as the uplink channel, and the upper limit US0 frequency coincides with the lower limit DS1 band, during signal transmission, upon request uplink and the downlink speeds of the transmission signal on VDSL2 realtime adjusting the frequency band US0 and the upper limit of the frequency band DS1 coincident point, the upper VDSL2, the rate of the downlink channel to achieve a desired rate value as possible. 为了使本技术领域的人员更好地理解本发明方案,下面结合附图和实施方式对本发明作进一步的详细说明。 In order to make those skilled in the art a better understanding of the invention, The present invention will be described in further detail in conjunction with the accompanying drawings and embodiments.

参照图4,图4示出了本发明方法一个优选实施例的实现流程,包括以下步骤: Referring to FIG. 4, FIG. 4 illustrates a method of the present invention to achieve a preferred embodiment of the process, comprising the steps of:

步骤401:将VDSL2的US0频段作为上行信道,并使US0频段的上限与DS1频段的下限重合。 Step 401: the channel is an uplink frequency band US0 of VDSL2, and the upper limit and the lower limit of the frequency band US0 band DS1 overlap.

由于VDSL2标准G.993.X中频谱定义了US0 (上行信号)频段,但目前该频段并未使用。 Since VDSL2 standard defines US0 G.993.X spectrum (uplink signal) frequency band, but the band is not used. 因此,本发明为解决VDSL2在长距离用户线上无上行信号通道的问题,启用US0频段。 Accordingly, the present invention is to solve the problem in the long distance subscriber line VDSL2 no uplink signal path, the frequency band US0 enabled. 并且为了充分利用频谱资源,使US0频段的上限与DS1频^爻的下限频率点fl重合,并且该重合点可根据要求进行实时调整。 To make full use of resources and spectrum, so that the upper limit of the frequency band US0 DS1 Yao frequency ^ lower limit frequency fl coincident point, and the overlapping point may be adjusted in real time according to the requirements. 基于这种使用,本发明中对应的VDSL2的频-潜如图5所示。 Based on this use, the present invention is a frequency corresponding VDSL2 - potential as shown in FIG.

步骤402:设定重合点的初始值为标准中频谱划分的DS1频段的下限值, 即现有标准中DS1频段的下限频率点fl。 Step 402: setting the lower limit initial value of the standard DS1 band coincident point in the spectrum allocation, i.e., the existing standard DS1 point lower frequency band fl. 当然,也可以设定重合点的初始值为US0频段的下限至DS1频段的上限之间的任何频点。 Any frequency band US0 between the lower limit initial value of the upper limit, of course, may be set to point to the coincident frequency band DS1.

步骤403:确定在重合点取初始值时VDSL2上传输信号期望的上行速率和下行速率。 Step 403: determining the transmission rate of uplink and downlink with the desired signal from the initial value taken when VDSL2 coincident points.

步骤404:实时测量在VDSL2上传输信号实际的上行速率和下行速率。 Step 404: the real-time measurement of the actual rate of uplink and downlink with a transmission signal on VDSL2. 步骤405:判断测量的实际的上行速率和下行速率是否达到期望的上行速 Step 405: The uplink and downlink with the actual rate is determined whether the measured upstream a desired speed

率和下行速率。 Rate and the downstream rate. 如果达到,则进到步骤406;否则,进到步骤407。 If reached, then proceeds to step 406; otherwise, proceeds to step 407.

局端根据实测得到的比特加载表,在fl取初值的前提下,对比实际的上 The central office of the actually measured bit-loading table, taken on the premise fl initial value, the comparison of the actual

下行速率与要求的上下行速率。 Rate of the downlink and uplink rate requirements. 如果达到要求,维持fl的值不变。 If you meet the requirements, the value of maintaining fl unchanged. 如果不满 If dissatisfied

足要求,则需要调整fl的值。 Meet the requirements, you need to adjust the value of fl.

步骤406:延迟预定时间后,返回步骤404,进行下一次测量。 Step 406: After a predetermined time delay, returning to step 404, the next measurement. 其目的是对信道进行动态实时调整,该预定时间可以根据实际需要设置。 Its purpose is to adjust the dynamic real-time channel, the predetermined time may be set according to actual needs. 步骤407:根据VDSL2上传输信号的上行速率和下行速率的要求调整US0 频段上限与DS1频段下限的重合点。 Step 407: Adjust the upper band US0 point coincides with the lower limit frequency band DS1 request uplink and downlink with a transmission rate of the signal on VDSL2.

在上述步骤403中,需要确定在重合点取初始值时VDSL2上传输信号期望的上行速率和下行速率,下面对此进行详细说明。 In step 403, the transmission signal is determined by the desired rate of uplink and downlink with the initial value taken when VDSL2 coincident points, which is described in detail below.

为了得到期望的上下行信道的速率,在fl取初值的前提下,要求首先得到各频段的信噪比。 For downlink rate to obtain a desired channel, under the premise of taking the initial value of fl, it was first required SNR for each frequency band.

为此,在初始化过程中,设定USO频段的上限与DS1频段的下限重合, 并且该重合点取值为fl后,远端的调制解调器发送整个US0, US1, US2频带的信号,供局端测试。 For this purpose, during the initialization process, an upper limit and the lower limit coincides band USO band DS1, the coincident points and the value of fl, remote modem transmit the entire US0, US1, US2 band signals for central office test . 局端经过测试获取该频段内每个子载波的SNR(信噪比)。 Each central office tested acquired subcarriers within the band SNR (signal to noise ratio). 同样,局端的调制解调器发送DS1, DS2频带的信号,供远端测试。 Similarly, central office modem transmission signals DS1, DS2 frequency band, for the distal end of the test. 远端经过测试获取该频段内每个子载波的SNR。 After testing the distal end of each subcarrier SNR is obtained in this band. 测量SNR的方法在现有技术中有多种,可以根据需要选用。 There are several methods for measuring the SNR in the art, can be selected according to need.

这样,即可得到VDSL2上各频段内的每个子载波的SNR。 Thus, to obtain the SNR of each subcarrier of the band on VDSL2. 然后,根据每个子载波测得的SNR,利用公式: Then, for each subcarrier measured in the SNR, using the formula:

^ = wlog(l+《),.) (1) ^ = Wlog (l + ") ,.) (1)

计算出整个频段内每个子载波的加载比特数的总和。 Calculate the total number of the whole band bit loading per subcarrier. 因在长距离用户线上,DS2,US1,US2频段信号衰减大,超出接收的最小范围,可以认为这3个频段加载的比特数为0。 Due to the long distance subscriber lines, DS2, US1, US2-band signal attenuation, exceeds the minimum range of the receiver, it is believed that the number of bits is loaded three bands 0. 因此,只需分别计算出USO, DS1频段内的每个子载波能加载的比特数即可。 Thus, only USO were calculated, for each sub-carrier within the frequency band DS1 to the number of bits can be loaded.

式中,i 是各频带中子载波的编号,即满足 Wherein, i is the number of subcarriers in each frequency band, i.e., to meet the

y?離(,。L )《"y?—~-^~—), floor表示向下取整; y 4.3125A: 、4.3125A 各「 , ? Y from (, .L) "" y - ~ - ^ ~ -), floor represents rounding down; y 4.3125A:?, 4.3125A each ",

bi表示第i个子载波加载的比特数; bi represents the number of bits of the i-th subcarrier loading;

(S/N)i表示第i个子载波加载测得的信噪比; (S / N) i represents the i th subcarrier SNR measured load;

w是每个子载波的带宽,4.3125KHz。 w is the bandwidth of each subcarrier, 4.3125KHz. 得到VDSL2上各频段的比特加载表后,即可根据比特加载表计算出VDSL2上传输信号期望的上行速率和下行速率。 After the band is obtained on the bit-loading table VDSL2, bit-loading table according to the calculated transmission rate of uplink and downlink with the desired signal on VDSL2.

比如,计算出上行的加栽比特数为、=^>' + ^>' + 5>/,该值即为上行传 For example, adding up the calculated number of bits is planted, = ^> '+ ^>' + 5> /, the value is the upstream transmission

咖t/Sl WS'2 Coffee t / Sl WS'2

输速率。 Transmission rate.

下行的加载比特数为~,w„=5>+2>,该值即为下行传输速率。 The number of bits in the downlink loading is ~, w "= 5> +2>, the value is the downlink transmission rate.

在VDSL2信号传输过程中,对比实际的上下行信道速率与期望的上下行信道速率,如果达到要求,即实际上行速率与期望上行速率相等;实际下行速率与期望下行速率相等,则维持重合点的频点值不变;如果未达到要求,则需要以该重合点的位置进行调整,也就是说要调整重合点的频点值,从而调整上行频段US0和下行频,殳DS1的频谱宽度。 In VDSL2 signal transmission, compare the actual downlink channel rate and the desired downlink channel rate, if to meet the requirements, i.e., actual uplink rate and desired uplink rate equal; equal to the actual downstream rate and a desired downlink bit rate, is maintained coincident points frequency constant value; if not meet the requirements, it is necessary to adjust the position of the overlapping point, that is to adjust the frequency value coincides with the point, so as to adjust the uplink frequency band US0 and the downlink frequency, the spectral width Shu DS1.

下面详细说明本发明中对US0频段的上限与DS1频段的下限的重合点的调整过程。 The following detailed description of the process of the present invention to adjust the upper limit of the frequency band US0 and the overlapping point of the lower limit of the frequency band DS1.

根据对实测的上下行信道速率与期望的上下行信道速率的比较结果,可以有以下几种情况: According to the comparison result of the measured channel rate and a desired vertical speed Downlink channel, there may be the following situations:

1.当实际的下行速率大于期望的下行速率,并且实际的上行速率小于期望的上行速率时,将重合点向频率高的方向移动。 1. When the downstream rate of the actual downstream speed greater than the desired and the actual upstream rate less than the desired rate when the uplink, the coincident point shifted to the high frequency direction.

如果实测的上行速率小于期望的上行速率,而下行速率大于期望的下行速率,则将下行速率大于下行期望速率的部分,分配给上行信道,即将DS1频谱中与US0相接的一部分划给US0,如图6所示,其中,图6(a)是f,调整前的示意图,图6 (b)是f,调整后的示意图。 If the uplink rate is less than the desired measurement rate of the uplink, and the downlink rate greater than the desired downlink rate, then the rate is greater than the downstream portion downstream desired rate assigned to the uplink channel, i.e. the DS1 frequency spectrum allocated to a portion in contact US0 US0, 6, wherein FIG. 6 (a) is F, a schematic diagram before adjustment, FIG. 6 (b) is F, schematic view of the adjustment. 图6中,上行信道的速率因上行频谱增大而提升。 6, the rate of the upstream channel due to increase lift upstream spectrum.

具体实现时,重合点调整的幅度可以根据需要来确定。 In specific implementation, adjustment is coincident point may be determined as required. 比如,先计算出下行速率满足期望的下行速率后可以节省出的频谱宽度,将这部分频谱宽度一次性地划分给US0。 For example, the spectral width can be saved after the first downlink rate is calculated to satisfy a desired downlink rate, once this part of the spectrum allocated to the width US0. 还可以设定一个固定的调整幅度,每次调整时按照该幅度进行调整。 You can also set a fixed adjustment, adjusted in accordance with the magnitude of each adjustment. 如果调整后上行速率仍不满足要求,等下次测量后,在保证下行速率 If the uplink rate is still adjusted to meet the requirements, like the next measurement, the downlink rate guaranteed

满足要求的前提下,再继续缩小DS1的频镨宽度,进行相应的调整。 Under the premise to meet the requirements, and then continues to shrink the width of the DS1 frequency praseodymium, adjusted accordingly.

,t没DS1有256个子栽波,小的编号对应频率4氐的载波。 , T DS1 has no sub planted wave 256, the frequency corresponding to the smaller number of carriers 4 Di. 如果下4于需要 If you need to under 4

200个子载波,则分配主合下行的子载波乂人编号1至200,而编号201至256的 200 subcarriers, subcarrier qe human main clamp downlink is assigned numbers 1 to 200, 201 to 256 and the number of

子栽波为DS1节省出来的频谱宽度,可以将这部分频谱宽度划分给USO使用。 Son planted wave DS1 freed up spectrum width, the width of the spectrum can be allocated to this part of USO use. 提升后的上行速率与期望的上行速率相比,有三种可能:小于期望的速率、 Uplink rate as compared with the desired rate of the lifted up, there are three possibilities: less than the desired rate,

等于期望的速率、大于期望的速率。 Equal to the desired rate, greater than the desired rate.

针对这三种可能,可根据需要进行相应的处理。 For these three may be appropriate treatment if necessary. 比如: such as:

(1) 当实际上行速率小于期望上行速率时,向系统告警。 (1) when the actual uplink rate is less than a desired uplink rate, to an alarm system. 由系统作相应的处理,如减少上行速率或下行速率。 By the system for the corresponding process, such as reducing the rate of an uplink or downlink rate.

(2) 当实际上行速率与期望上行速率相等时,是最理想的情况,保存fl 的值即可。 (2) when the line speed is actually equal to the desired uplink rate, it is the ideal situation, to hold the value of fl.

(3) 当实际上行速率大于期望上行速率时,可才艮据运营商的要求作进一步的处理。 (3) when the line is actually greater than the desired rate of uplink rate, it can, according to the requirements of operators Gen for further processing. 如不做进一步处理,使用并保存fl值;或在保证最小的上行速率, 争取更大的下行速率,即转到上行速率等于期望的上行速率,而下行速率大于期望的下行速率的处理流程。 As no further processing, use and store values ​​fl; uplink or guaranteed minimum rate, for greater speed downlink, i.e. uplink rate equal to the desired rate of uplink, downlink and the downlink rate is greater than the desired flow rate of the process.

2.当实际的下行速率小于期望的下行速率,并且实际的上行速率大于期望的上行速率时,将重合点向频率低的方向移动。 2. When the actual downstream rate is less than the desired speed downlink and uplink rate is greater than the actual rate at the desired uplink, the coincident point is moved to the low frequency direction.

如果实测的上行速率大于期望的上行速率,而下行速率小于期望的下行速率,则将上行速率大于上行期望速率的一部分配给下行信道,即将USO频谱中与DSl相接的一部分划给DSl,如图7所示,其中,图7(a)是f,调整前的示意图,图7 (b)是fW周整后的示意图。 If the uplink rate is greater than the desired measured uplink rate, and the downlink rate is less than a desired downlink rate, then the uplink rate is greater than the upstream portion of a desired dispensing rate downlink channel, i.e. frequency spectrum USO contact with a portion allocated to DS1 DS1, FIG. 7, wherein FIG. 7 (a) is F, a schematic diagram before adjustment, FIG. 7 (b) is a schematic view of the entire circumferential fW. 在图7中,下行信道的速率因下行频谱增大而提升。 In FIG. 7, the rate of the downlink channel due to increase lift downlink spectrum.

同样,具体实现时,重合点调整的幅度可以根据需要来确定。 Likewise, the specific implementation, the amplitude coincident point adjustment can be determined according to need. 比如,先计算出上行速率满足期望的上行速率后可以节省出的频镨宽度,将这部分频镨宽度一次性地划分给DS1。 For example, after the first uplink rate calculated to satisfy the desired uplink rate can save the frequency width of praseodymium, praseodymium this part of the frequency division width in one portion to the DS1. 还可以设定一个固定的调整幅度,每次调整时按照该幅度进行调整。 You can also set a fixed adjustment, adjusted in accordance with the magnitude of each adjustment. 如果调整后上行速率仍不满足要求,等下次测量后,在保证上行速率满足要求的前提下,再继续缩小USO的频谱宽度,进行相应的调整。 If the uplink rate is still adjusted to meet the requirements, like the next measurement, to ensure uplink rate to meet the requirements of the premise, and then continue to reduce the spectral width USO, adjusted accordingly.

假设US0有256个子载波,小的编号对应频率低的载波。 Suppose low US0 256 subcarriers, the number corresponding to a small frequency carrier. 如果上行需要200个子载波,则分配给上行的子载波从编号1至200, 而编号201至256 的子载波为US0节省出来的频错宽度,可以将这部分频谱宽度划分给DS1使用。 If the uplink requires 200 subcarriers, the subcarriers allocated to the uplink from numbers 1 to 200, and subcarrier number from 201 to 256 for frequency error US0 freed up width, the width of the portion of the spectrum can be allocated to these DS1 use.

提升后的下行速率与期望的下行速率相比,有三种可能:小于期望的速率、 等于期望的速率、大于期望的速率。 Compared downlink rate desired to enhance the rate of the downlink, there are three possibilities: less than the desired rate, equal to the desired rate, greater than the desired rate.

(1) 当实际下行速率小于期望下行速率时,向系统告警。 (1) when the actual rate is less than the desired downlink downlink rate, to an alarm system. 由系统作相应的处理,如减少上行速率或下行速率。 By the system for the corresponding process, such as reducing the rate of an uplink or downlink rate.

(2) 当实际下行速率与期望下行速率相等时,是最理想的情况。 (2) When the desired rate is equal to the actual downlink downlink rate, it is the ideal situation. 保存fl 的4直即可。 Save 4 straight to the fl.

(3) 当实际下行速率大于期望下行速率时,可才艮据运营商的要求作进一步的处理。 (3) When the desired rate is greater than the actual downlink downlink rate, it can, according to the requirements of operators Gen for further processing. 如不做进一步处理,使用并保存fl值;或在保证最小的下行速率, 争取更大的上行速率,即转到下行速率等于期望的下行速率,而上行速率大于期望的上行速率的处理流程。 As no further processing, use and store values ​​fl; or minimum guaranteed downlink bit rate, for higher uplink rate, i.e. the downlink rate is equal to a desired speed downlink, and the uplink rate is greater than the desired rate of upstream processes.

3.当实际的下行速率等于期望的下行速率,并且实际的上行速率大于期望的上行速率时,根据运营商要求调整重合点。 3. When the actual downstream rate equal to the desired downlink rate, and the actual upstream rate is greater than a desired uplink rate, the adjustment coincident point according to operator requirements. 比如,可以不调整重合点,并在保证下行速率满足要求的前提下,提供最大的上行速率;或者调整重合点, 使上行速率和下行速率都最大化。 For example, the adjustment may not be coincident points, and while ensuring the downlink rate to meet the requirements, to provide maximum uplink rate; or coincident point adjustment, that the rate of uplink and downlink with maximized. 具体调整过程如下: Specific adjustment process is as follows:

(1) 在保证上行速率满足要求的前提下,争取最大的下行速率。 (1) at a guaranteed uplink rate to meet the requirements of the premise, to maximize the downlink rate. 此时不 Then do not

用调整fl。 Regulating fl.

(2) 使上、下行速率都最大化。 (2) the upper, downstream rates are maximized. 此时,需要重新调整fl。 At this point, you need to re-adjust fl. 具体实现时, 可以由局端将上行比特加载表与下行比特加栽表的总比特数相加再除2。 In specific implementation, the central office can be the total number of bits of the uplink and downlink bit-loading table adding further bits plus other plant Table 2. 由平均值与比特加载表可求出fl的值。 The average value can be determined with bit-loading table values ​​of fl. 求平均值时,如出现小数部分,可采用向下取整的方法。 When averaging, where there is the fractional part, rounding down can be employed in the method. 这样得到的结果可以使上、下行的实际速率比期望值只相差几个比特。 The results thus obtained can be the upper, downstream of the actual rate than expected difference of only a few bits.

当然,本发明并不限于上述对重合点的调整几种方式,可根据应用需要, 设定其他调整方式,只要使实际上行速率和下行速率尽可能地满足期望的速率值即可。 Of course, the present invention is not limited to the ways of adjusting coincident point, may be required by the application, setting adjustments other ways, so long as the actual uplink and the downlink speeds as much as possible to meet the desired rate value.

在传输信号速率最恶化的情况下,即实测的上行速率小于期望的上行速率,下行速率也小于期望的下行速率时,可以向系统告警,由系统作相应的处理,如减少上行速率或下行速率。 In the case of a transmission signal rate of the most deteriorated, i.e. uplink rate measured is less than the desired upstream rate, downstream rate is less than a desired downlink rate can be made to system alarms, the system for the corresponding process, such as reducing the uplink rate or downlink rate .

对重合点进行调整后,局端可以将调整后的重合点的值通过专用测试信道传送给远端的调制解调器。 After adjustment of coincident points, coincident point value may be adjusted after the central office to the remote modem transmits the test through a dedicated channel.

参照图8,图8示出了本发明系统的一个优选实施例的原理框图: Referring to FIG. 8, FIG. 8 shows a block diagram of an embodiment of a preferred system of the invention:

在该实施例中,本发明系统包括:重合点设定装置Sl、重合点调整装置S2。 In this embodiment, the system comprises: setting means Sl is coincident points, coincident point adjustment means S2. 其中,重合点设定装置Sl用于设定VDSL2的US0频段的上限与DS1频段的下限的重合点的初始频点值;重合点调整装置S2用于根据VDSL2上传输信号的上行速率和下行速率的要求调所述重合点。 Wherein Sl coincident point means for setting an initial value of the maximum frequency band US0 VDSL2 set point coincides with the lower limit of the frequency band DS1; S2 coincident point adjustment means for downlink and uplink rate according to the rate of the transmission signal VDSL2 adjusting said coincident point requirement.

在前面对本发明方法的描述中已说明,在本发明中,需要启用现有标准中未使用的VDSL2的US0频段,将其作为上行信道,并使US0频段的上限与DS1频段的下限重合。 The method of the preceding description of the present invention has been described, in the present invention, the need to enable existing standard band US0 unused VDSL2 will as an uplink channel, and the upper limit and the lower limit of the frequency band US0 band DS1 overlap. 本发明系统同样基于该思想。 The present invention is also based on the idea system. 当然,该重合点所在的频点的初始值可以在US0频段的下限与DS1频段的上限之间任意设置。 Of course, the initial value of frequency points where the overlapping point can be arbitrarily set between the upper limit and the lower limit of the frequency band US0 band DS1. 比如, 为了简单实现中的计算过程,可以设定该重合点的初始值为标准中频谱划分的DS1频段的下限值。 For example, in order to achieve a simple calculation, the DS1 can be set lower limit frequency of the initial value of the standard point coincident spectrum division.

为了能够才艮据VDSL2上传输信号的实际速率对重合点进行合理的调整, 使VDSL2能够传输的距离更长,在本发明中,可以根据VDSL2上传输信号的上行速率和下行速率的要求调整USO频段上限与DS1频段下限的重合点。 To be able to only transmit signals Gen data on the actual rate of coincident points VDSL2 reasonable adjustments to the longer transmission distance can be VDSL2, in the present invention can be adjusted according to the requirements USO rate of uplink and downlink with a transmission signal on VDSL2 frequency band DS1 point coincides with the upper and lower limits. 为此,在该实施例中,由期望速率确定装置S3确定在重合点取初始值时VDSL2 上传输信号期望的上行速率和下行速率,并将确定的期望速率传送给重合点调整装置S2。 For this reason, in this embodiment, is determined by the desired rate means the transmission signal S3 determines the desired speed uplink and downlink with the initial value taken when VDSL2 coincident points, and to determine a desired transmission rate adjusting means coincident point S2. 这样,重合点调整装置S2就可根据该期望值与实际测量得到的上行速率和下行速率来对重合点进行相应地调整。 Thus, coincidence point adjustment means S2 can be adjusted accordingly to the coincident point according to uplink and downlink with a desired value and the actual rate of the measurement.

期望速率确定装置S3包括:信噪比测量单元S31和期望速率计算单元S32。 S3 desired rate determining means comprises: a measuring unit S31 and a desired signal to noise rate calculating unit S32. 其中,信噪比测量单元S31用于测量在所述重合点取初始值时VDSL2 上各频段内每个子载波的信噪比;期望速率计算单元S32用于根据所述信噪比计算VDSL2上传输信号期望的上行速率和下行速率。 Wherein the SNR measuring unit for measuring S31 SNR on each subcarrier in each band VDSL2 when the coincident point to take an initial value; S32 desired rate calculating means for transmission on said calculated SNR VDSL2 signal of uplink and downlink with the desired rate.

需要说明的是,信噪比测量单元S31包括局端信噪比测量单元和远端信噪比测量单元,分别在局端和远端对在重合点取初始值时VDSL2上的各上行频段内每个子载波的信噪比及各下行频段内每个子载波的信噪比进行测量。 Incidentally, the SNR measuring unit S31 includes a central office and remote SNR SNR measuring unit measuring unit and the central office are at the distal end of the initial value taken when the coincident point on each of the uplink frequency VDSL2 and various signal to noise ratio SNR of each subcarrier of a downlink frequency band of each subcarrier is measured. 具体测量过程可以参照前面对本发明方法中的描述,在此不再赘述。 Specific measurement process can be described with reference to the foregoing method of the present invention, which is not repeated herein.

重合点调整装置S2包括:实际速率测量单元S21、比较单元S22和调整执行单元S23。 S2 coincident point adjusting means comprising: an actual rate measuring unit S21, the comparison unit S22 and the adjustment execution unit S23. 其中,实际速率测量单元S21用于实时测量在VDSL2上传输信号实际的上行速率和下行速率;比较单元S22用于比较实际速率测量单元S21测量到的实际的上行速率和下行速率与所述期望速率确定装置确定的期望的上行速率和下行速率;调整执行单元S23用于根据比较单元S22的比较结果调整所述重合点。 Wherein the actual rate measuring means S21 for real-time measurement of the actual transmission rate of uplink and downlink with the VDSL2 signal; comparing means for comparing the actual rate of S22 S21 measurement unit to measure the actual rate of uplink and downlink with the desired rate and determining a desired downstream speed of the upstream rate determining means; S23 adjustment execution means for adjusting said coincident point according to a comparison result of the comparison unit S22.

在VDSL2信号传输过程中,由实际速率测量单元S21实时测量在VDSL2 上传输信号实际的上行速率和下行速率,比较单元S22对该测量结果与期望速率确定装置S3确定的期望的上行速率和下行速率进行比较,比较结果可以有以下几种情况: VDSL2 in signal transmission, the actual rate measured by the time measurement unit S21 actual rate of uplink and downlink with a transmission signal on VDSL2, measurements with the desired rate comparison unit S22 determines a desired rate of uplink and downlink with the apparatus S3 is determined for comparison, which can result in the following situations:

1. 实际的下行速率大于期望的下行速率,并且实际的上行速率小于期望的上行速率时; 1. The actual downlink rate is greater than a desired speed downlink and uplink rate is less than the actual rate at the desired uplink;

2. 实际的下行速率小于期望的下行速率,并且实际的上行速率大于期望的上行速率时; 2. The actual rate is less than the desired downlink downlink rate, and the actual upstream rate is greater than a desired uplink rate;

3. 实际的下行速率等于期望的下行速率,并且实际的上行速率大于期望的上行速率; 3. The actual downstream rate equal to the desired downlink rate, and the actual upstream rate is greater than a desired uplink rate;

4. 实际的上行速率小于期望的上行速率,下行速率也小于期望的下行速 4. The actual upstream rate is less than the desired rate of uplink, downlink rate is less than the desired speed downlink

率; rate;

5. 实际的上行速率大于期望的上行速率,下行速率也大于期望的下行速率。 The actual upstream rate is greater than the desired rate of uplink, downlink downlink rate is also greater than the desired rate.

在上述第1至4的情况下,上行速率或下行速率不满足期望的上行速率或下行速率,这时,需要对重合点进行调整,以使上行速率和下行速率尽可能达到最优。 In the case of the first 1 to 4, downlink or uplink rate does not satisfy a desired rate or rate of uplink downlink rate, then, need to be adjusted to coincide with the point, so that the uplink and downlink with optimal speed possible. 在第5的情况下,上、下行速率均满足要求,此时,不需要调整重合点的位置。 In the case of the fifth, the downlink rate requirements are met, then, no need to adjust the position of the point of coincidence.

在上行速率或下行速率不满足要求的情况下对重合点的调整过程可参照前面本发明方法中的描述。 In the case of the uplink rate or rate of downlink adjustment process does not meet the requirements described in the foregoing coincident point in the method of the present invention can be referred to. 当然本发明也并不局限于前面描述的几种调整方式。 Of course, the present invention is not limited to the embodiment previously described in several adjustments. 在实际应用中,还可设定其他调整方式,只要使实际上行速率和下行速率尽可能地满足期望的速率值即可。 In practice, adjustment may be set to other ways, so long as the actual uplink and the downlink speeds as much as possible to meet the desired rate value.

为了方便不同应用商制定自己的调整策略,还可以在本发明系统中设置一个调整策略设置装置S4,该装置与调整执行单元S23相连,用于设定调整执行单元对重合点调整所需的调整策略。 In order to facilitate different application providers develop their own adjustment policy, the policy may be provided an adjustment apparatus S4 is provided in the system of the present invention, the apparatus is connected with the adjustment unit S23 performs, for adjusting the desired setting adjustment means performs adjustment of the coincident points strategy. 这样,在不同的应用环境及对于不同的应用商,就可以才艮据自己的需要来设定相应的调整策略,有效地增加了本发明系统应用的灵活性。 Thus, in different environments and for different application providers, you can only Burgundy, according to their own needs to set the appropriate adjustment strategy, effectively increasing the flexibility of the present invention system applications.

虽然通过实施例描绘了本发明,本领域普通技术人员知道,本发明有许多变形和变化而不脱离本发明的精神,希望所附的权利要求包括这些变形和变化而不脱离本发明的精神。 Although the present invention is depicted by way of example, those of ordinary skill in the art know that there are many modifications and variations of the present invention without departing from the spirit of the invention, it intended that the appended claims cover such modifications and variations without departing from the spirit of the invention.

Claims (15)

1、一种利用第二代甚高速数字用户线传输信号的方法,其特征在于,所述方法包括: 启用第二代甚高速数字用户线(VDSL2)的US0上行频段,并使US0上行频段的上限与DS1下行频段的下限重合; 根据实时测量的传输信号实际的上行速率和下行速率与期望的上行速率和下行速率的比较结果调整US0上行频段上限与DS1下行频段下限的重合点。 A second generation of very high speed digital subscriber line transmission signal using a method, wherein the method comprises: enabling the second generation of Very High Speed ​​Digital Subscriber Line (VDSL2) is an uplink frequency band US0, the uplink frequency band US0 and downlink frequency band DS1 upper and lower limit coincides; upper band US0 coincident point adjusting uplink and downlink frequency band DS1 lower limit of the transmission signal according to the comparison result of the real-time measurement of the actual rate of uplink and downlink with the uplink and downlink with a desired rate.
2、 根据权利要求1所述的方法,其特征在于,所述方法还包括: 设定所述重合点的初始值为标准中频谱划分的DS1下行频段的下限值。 2. The method according to claim 1, wherein said method further comprises: setting an initial value of the lower limit coincides with the point of the standard spectrum divided DS1 downstream band.
3、 根据权利要求2所述的方法,其特征在于,所述根据实时测量的传输信号实际的上行速率和下行速率与期望的上行速率和下行速率的比较结果调整US0上行频段上限与DS1下行频段下限的重合点的步骤包括:确定在所述重合点取初始值时VDSL2上传输信号期望的上行速率和下行速率;实时测量在VDSL2上传输信号实际的上行速率和下行速率; 当所述实际的上行速率和下行速率未达到期望的上行速率和下行速率时, 调整所述重合点。 3. The method according to claim 2, wherein said upper frequency band US0 adjusting uplink and downlink frequency band DS1 transmission signal according to the comparison result of the real-time measurement of the actual rate of uplink and downlink with the uplink and downlink with the desired rate the lower limit coincident point step comprises: determining a desired transmission signal rate on the uplink and downlink with VDSL2 when the coincident point to take an initial value; real-time measurement of the actual transmission rate of uplink and downlink with VDSL2 signals; when the actual uplink and the downlink speeds are not the uplink and downlink with a desired rate up, adjusting the coincidence point.
4、 根据权利要求3所述的方法,其特征在于,所述确定在所述重合点取初始值时VDSL2上传输信号期望的上行速率和下行速率的步骤包括:测量在所述重合点取初始值时VDSL2上各频段内每个子载波的信噪比; 根据所述信噪比确定各频段的比特加载表;根据所述比特加载表计算VDSL2上传输信号期望的上行速率和下行速率。 4. The method of claim 3, wherein said step of determining a desired transmission signal rate of uplink and downlink with the VDSL2 the coincident points included in the initial value taken: taking measurements at the initial point coincident each SNR in the upper band of each subcarrier VDSL2 value; determined according to the SNR of each frequency band bit-loading table; computing VDSL2 transmission signal according to said desired bit-loading table uplink and the downlink speeds.
5、 根据权利要求4所述的方法,其特征在于,所述根据信噪比确定各频段的比特加载表的步骤包括:利用公式6, = wlog(l + (丄),)计算各频段内的每个子载波能加载的比特数, 其中,i为频段内子载波的编号,bi为第i个子载波加载的比特数,(S/N)i为第i个子载波加载测得的信噪比,w为每个子载波的带宽;根据计算得到的比特数确定各频段的加载比特表。 5. The method as claimed in claim 4, wherein said step of determining bit-loading table for each band signal to noise ratio comprises: using Equation 6, = wlog (l + (Shang),) was calculated for each frequency band the number of bits per subcarrier can be loaded, where, i is the number of subcarrier bands, the number of BI bits for the i-th subcarrier loading, (S / N) i is the i th subcarrier SNR measured load, w is the bandwidth of each subcarrier; determining bits for each frequency band loading table the number of bits calculated.
6、 根据权利要求3所述的方法,其特征在于,所述调整所述重合点的步骤包括:当实际的下行速率大于期望的下行速率,并且实际的上行速率小于期望的上行速率时,将所述的重合点向频率高的方向移动;当实际的下行速率小于期望的下行速率,并且实际的上行速率大于期望的上行速率时,将所述的重合点向频率低的方向移动;当实际的下行速率等于期望的下行速率,并且实际的上行速率大于期望的上行速率时,根据运营商要求调整所述重合点。 6. The method of claim 3, wherein the step of adjusting the coincident point comprises: when the downlink rate of the actual downstream rate greater than the desired and the actual upstream rate less than the desired rate of the uplink, the the coincident point shifted to the high frequency direction; when the actual speed is less than the desired downlink downlink rate, and the actual upstream rate greater than the desired rate of the uplink, the coincident point is moved to the lower frequency direction; when the actual the downlink rate equal to the desired speed downlink and uplink rate when the actual uplink rate greater than the desired, according to the operator to adjust the coincident points requirements.
7、 根据权利要求6所述的方法,其特征在于,所述根据运营商要求调整所述重合点的步骤包括:不调整所述重合点,并在保证下行速率满足要求的前提下,提供最大的上行速率;或者调整所述重合点,使上行速率最大化,或使下行速率最大化,或使上行速率和下行速率都最大化。 7. The method of claim 6, wherein said operator according to claim adjusting the coincident point comprises: adjusting the not coincident points, and while ensuring the downlink rate to meet the requirements, maximum the uplink rate; or adjusting the coincident point, maximizing the rate for uplink, downlink or to maximize the rate of, or to both uplink and the downlink speeds maximized.
8、 根据权利要求7所述的方法,其特征在于,所述调整所述重合点,使上行速率和下行速率都最大化的步骤包括:根据上行比特加载表和下行比特加载表重新确定所述重合点。 8. The method of claim 7, wherein the adjusting the coincident points, comprising the step of making an uplink and the downlink speeds are maximized: re-determining the bit-loading table according to the uplink and downlink bit-loading table coincident points.
9、 根据权利用要求6所述的方法,其特征在于,所述方法还包括:如果实际的上行速率小于期望的上行速率,并且实际的下行速率小于期望的下行速率,则发送告警消息。 9. The method of claim 6 with claim, characterized in that, said method further comprising: if the actual upstream rate is smaller than a desired uplink rate, and the actual rate is less than the desired downlink downlink rate, an alarm message is sent.
10、 根据权利要求1所述的方法,其特征在于,所述方法还包括:局端将调整后的重合点的值通过专用测试信道传送给远端的调制解调器。 10. The method of claim 1, wherein said method further comprises: a central office value coincident points of the adjusted transmission to the remote modem through a dedicated test channel.
11、 一种利用第二代甚高速数字用户线传输信号的系统,其特征在于,所述系统启用第二代甚高速数字用户线(VDSL2)的US0上行频段,所述系统包括:重合点设定装置,用于设定VDSL2的US0上行频段的上限与DS1下行频段的下限的重合点的初始频点值;重合点调整装置,用于根据实时测量的传输信号实际的上行速率和下行速率与期望的上行速率和下行速率的比较结果调整所述重合点。 11. A second generation of very high-speed digital subscriber line transmission system using the signal, wherein the second-generation systems enable very high-speed Digital Subscriber Line (VDSL2) is an uplink frequency band US0, the system comprising: a set point coincident fixed means for the initial frequency value coincides with the point of the upper limit of the downlink frequency band DS1 is set, VDSL2 upstream frequency band US0; coincidence point adjusting means, according to the actual uplink and downlink with a transmission rate of the signal measured in real time and comparison result desired rate of uplink and downlink with the coincident point adjustment.
12、 根据权利要求11所述的系统,其特征在于,所述系统还包括: 期望速率确定装置,与所述重合点设定装置相连,用于确定在所述重合点取初始值时VDSL2上传输信号期望的上行速率和下行速率,并将确定的期望速率传送给所述重合点调整装置。 12. The system of claim 11, wherein said system further comprises: a desired rate determining means coincides with the point setting means, for determining when the coincident point takes the initial value VDSL2 a transmission signal of uplink and downlink with the desired speed, and the determined transmission rate to the desired coincidence point adjusting means.
13、 根据权利要求12所述的系统,其特征在于,所述期望速率确定装置包括:信噪比测量单元,用于测量在所述重合点取初始值时VDSL2上各频段内每个子载波的信噪比;期望速率计算单元,用于根据所述信噪比计算VDSL2上传输信号期望的上行速率和下行速率。 13. The system as claimed in claim 12, wherein said desired rate determining means comprises: noise ratio measuring unit for measuring each of the subcarriers within the bands VDSL2 when the coincident point to take the initial value SNR; desired rate calculating means for calculating a desired transmission on the basis of the signal VDSL2 uplink SNR and the downlink speeds.
14、 根据权利要求12所述的系统,其特征在于,所述重合点调整装置包括:实际速率测量单元,用于实时测量在VDSL2上传输信号实际的上行速率和下行速率;比较单元,用于比较所述实际速率测量单元测量到的实际的上行速率和下行速率与所述期望速率确定装置确定的期望的上行速率和下行速率;调整执行单元,与所述重合点设置装置相连,用于根据所述比较单元的比较结果调整所述重合点。 14. A system as claimed in claim 12, wherein said adjusting means comprises a coincident point: actual speed measurement unit for measuring the real time actual rate of uplink and downlink with a transmission signal on VDSL2; comparison means for comparing the actual rate measuring unit measures the actual rate of uplink and downlink with the desired rate determining a desired rate of uplink and downlink with determining means; adjustment execution unit, coincides with the point setting means is connected, according to comparison result of the comparing unit adjusts the coincident points.
15、根据权利要求14所述的系统,其特征在于,所述重合点调整装置还包括:调整策略设置单元,与所述调整^^行单元相连,用于设定调整执行单元对重合点调整所需的调整策略。 15. The system of claim 14, wherein said apparatus further comprises a coincidence point adjustment: adjusting the policy setting unit, connected to the row ^^ adjusting means for setting the adjusting unit adjusts the execution of the coincident points the required adjustment strategy.
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