WO2010072091A1 - 数据传输方法和中继装置 - Google Patents

数据传输方法和中继装置 Download PDF

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Publication number
WO2010072091A1
WO2010072091A1 PCT/CN2009/074177 CN2009074177W WO2010072091A1 WO 2010072091 A1 WO2010072091 A1 WO 2010072091A1 CN 2009074177 W CN2009074177 W CN 2009074177W WO 2010072091 A1 WO2010072091 A1 WO 2010072091A1
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Prior art keywords
twisted pair
data
coaxial
analog
coaxial line
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English (en)
French (fr)
Inventor
于洋
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Hangzhou H3C Technologies Co Ltd
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Hangzhou H3C Technologies Co Ltd
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    • 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]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H04L12/2869—Operational details of access network equipments
    • 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

Definitions

  • the present invention relates to the field of data communication technologies, and more particularly to a data transmission method and a relay device. Background of the invention
  • Broadband access-to-home technologies include VDSL (Very Good-High-bit-rate Digital Subscriber Loop) technology and Long Range Ethernet (LRE) technology.
  • VDSL and LRE technologies can be connected to the home using a telephone twisted pair.
  • the telephone line network in the user's room is a forked network.
  • the forked network will cause reflection and refraction of high-speed signals, and interference will be formed after superposition.
  • high-speed VDSL can only reach the fork point of the subscriber's indoor telephone line, and cannot reach the access point of each room like low-speed ADSL.
  • Twisted pair sometimes cannot reach the location that the user wants to access.
  • the location where the user sets the television in the living room is different from the location where the telephone is placed, for example, placed on one side and the other side of the sofa, which causes the user to be on the television.
  • the location of the machine does not accept the broadband required for the IPTV service.
  • the signal transmission quality of the coaxial line is not worse than that of the twisted pair.
  • the transmission frequency of the coaxial line is 0 ⁇ lGHz, which is obviously higher than the network cable or telephone line.
  • the existing indoor coaxial network mostly adopts branch distributor passive components to form a multi-point network. These passive devices have strong resistance to '1' in suppressing the multi-point interference design of the branch network.
  • a six-distributor As an example, it has one input (IN) port and five output (OUT) ports, which distributes the energy of the TV signal input to the input port evenly to each output port.
  • the attenuation between the input and output ports is large.
  • the nominal operating frequency range is 5MHz ⁇ 1GHz, and the measured operating frequency range is 0.3MHz ⁇ 1GHZ.
  • Each port of the distributor has a strong reflection loss, which can greatly reduce the interference of the reflected signal on the input signal.
  • Table 1 The parameters of the 2/3/4 distributor widely used by users in the national broadcasting and television standards are shown in Table 1:
  • the indoor distributor has targeted parameter settings and requirements for eliminating multi-point reflection and interference of the network.
  • the present invention provides two data transmission methods which enable wideband data transmission to different access points in a subscriber room using an indoor coaxial network when high speed broadband access is made via twisted pair.
  • the present invention also provides a relay device that enables broadband data transmission to different access points in a subscriber room using an indoor coaxial network when high-speed broadband access is made via twisted pair.
  • the present invention discloses a data transmission method, which uses a twisted pair cable to perform broadband access to a home service, and a broadband network in a user room is implemented by using a coaxial line.
  • the method includes: Receiving data transmitted by the twisted pair, performing analog-to-digital conversion processing, and performing twisted pair decoding processing; performing data compression processing on the twisted pair decoded data, performing digital-to-analog conversion processing; and performing the coaxial line
  • the data subjected to the digital-to-analog conversion processing after the encoding process is transmitted through the coaxial line.
  • the invention also discloses a data transmission method, which utilizes a twisted pair cable for broadband access to the home service, and the broadband network in the user room is implemented by using a coaxial line, and the method comprises: receiving data transmitted by the coaxial line, and performing the simulation After the number conversion process, the coaxial line decoding process is performed; the data after the coaxial line decoding process is subjected to the twisted pair coding process, and the digital-to-analog conversion process is performed; and the data subjected to the digital-to-analog conversion process after the twisted pair coding process is performed. Transmission via twisted pair.
  • the invention also discloses a relay device, which comprises: a twisted pair medium
  • the twisted pair medium PHY module is configured to receive data transmitted by the twisted pair, perform analog-to-digital conversion processing, perform twisted pair decoding processing, and send the twisted pair decoded data to the coaxial medium PHY module; Receiving data from the coaxial medium PHY module, performing twisted pair encoding processing, performing digital-to-analog conversion processing, and transmitting the digital-to-analog converted data through the twisted pair;
  • the coaxial medium PHY module is configured to receive data from the twisted pair medium PHY module, perform coaxial to digital-to-analog conversion processing after the coaxial line encoding process, and transmit the digital-to-analog converted data through the coaxial line;
  • the data transmitted on the same axis is subjected to analog-to-digital conversion processing, and then subjected to coaxial line decoding processing, and the data decoded by the coaxial line is sent to the twisted pair medium PHY module.
  • the data for receiving the twisted pair transmission of the present invention is sequentially subjected to analog-to-digital conversion processing, twisted pair decoding processing, coaxial coding processing, and digital-to-analog conversion processing, and then transmitted over the coaxial line;
  • the data transmitted by the axis is sequentially subjected to analog-to-digital conversion processing, Coaxial decoding processing, twisted pair encoding processing, and digital-to-analog conversion processing, through the twisted pair transmission technology, enables high-speed broadband access to the home through the twisted pair, can use the indoor coaxial network to complete the user
  • the broadband data transmission of different access points in the room effectively solves the problem of high-speed broadband access to the twisted pair due to the characteristics of the indoor telephone line.
  • FIG. 1 is a flowchart of a data transmission method according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of relaying twisted pair broadband data to a coaxial line according to an embodiment of the present invention
  • FIG. 3 is a block diagram showing the composition of a relay device according to an embodiment of the present invention. Mode for carrying out the invention
  • the core idea of the invention is: when high-speed broadband access is made by means of twisted pair, the broadband data transmission to different access points in the user room is completed by using the indoor coaxial network, and the twisted pair medium is coaxialized in the user room. Conversion of line media.
  • the broadband access to the home service is implemented by using the twisted pair cable, and the broadband network in the user room is implemented by using the coaxial line. As shown in FIG. 1, the method includes the following steps:
  • Step 101 Receive data transmitted by the twisted pair, perform analog-to-digital conversion processing, and perform twisted pair decoding processing; perform data compression processing on the data after the twisted pair decoding process, and perform digital-to-analog conversion processing; The data subjected to the digital-to-analog conversion processing after the coaxial coding process is transmitted through the coaxial line.
  • Step 102 Receive data transmitted by the coaxial line, perform analog-to-digital conversion processing, perform coaxial line decoding processing, perform twisted pair encoding processing on the coaxial line decoded data, and perform digital-to-analog conversion processing; Digital-to-analog conversion processing after twisted pair encoding processing Data is transmitted over twisted pair.
  • the method described in Fig. 1 enables broadband data transmission to different access points in the subscriber room to be completed using the indoor coaxial network when high-speed broadband access is made via twisted pair. Since the cable television coaxial network in the user room is universal, the technical solution of the present invention not only solves the technical problems encountered by the existing twisted pair broadband access, but also utilizes the available resources. The cost is lower.
  • FIG. 2 is a schematic diagram of a data transmission method for relaying twisted pair broadband data to a coaxial line according to an embodiment of the present invention. Referring to Figure 2, it mainly includes the following technical features:
  • the relay device that relays the twisted pair broadband data to the coaxial line mainly includes: a twisted pair medium PHY module and a coaxial line medium PHY module
  • the twisted pair medium PHY module and the coaxial medium PHY module can be implemented by using two existing physical layer (PHY) chips, one of which is a pair of twisted pair dielectric PHY modules.
  • the stranded dielectric PHY chip and the other is a coaxial dielectric PHY chip as a coaxial dielectric PHY module.
  • the twisted pair dielectric PHY chip is designed with a balanced 100 ohm impedance model.
  • the interface pin of the PHY chip to the medium is at least two pins, depending on whether the twisted pair is a pair of wires or two pairs of wires, and the impedance It is 100 ohms; the coaxial line PHY chip is designed as a single-ended 75 ohm impedance model.
  • the PHY chip has a pin for the interface of the medium and the impedance is 75 ohms.
  • the twisted pair medium PHY chip includes: a twisted pair medium interface unit, a twisted pair analog-to-digital conversion unit, a twisted pair codec unit, and a ⁇ (media independent interface) unit.
  • the coaxial media PHY chip includes: a unit, an in-axis codec unit, a coaxial analog to digital conversion unit, and a coaxial medium interface unit.
  • the data transmission process of high-speed broadband data from twisted pair to coaxial line includes: The twisted pair medium interface unit receives the analog signal from the twisted pair and sends it to the twisted pair analog-to-digital conversion unit; the twisted pair analog-to-digital conversion unit converts the analog signal into a digital signal and sends it to the twisted pair codec unit; The twisted pair codec unit performs the twisted pair decoding process and sends the unit to the twisted pair medium PHY chip; the twisted pair medium PHY chip sends the received data to the unit of the coaxial medium PHY chip; The unit of the coaxial medium PHY chip transmits the received data to the coaxial codec unit; the coaxial codec unit performs coaxial coding processing on the received data and sends the data to the coaxial analog-to-digital conversion unit.
  • the coaxial analog-to-digital conversion unit converts the received data into an analog signal and transmits it to the coaxial medium interface unit; the data received between the coaxial media interface units is sent to the
  • the transmission process of the data from the coaxial line to the twisted pair includes: the coaxial medium interface unit receives the analog signal from the coaxial line and sends it to the coaxial analog-to-digital conversion unit; the coaxial analog-to-digital conversion unit The analog signal is converted into a digital signal and sent to the coaxial line codec unit; the coaxial line codec unit performs the coaxial line decoding process and is sent to the unit of the coaxial medium PHY chip; the unit of the coaxial medium PHY chip Transmitting the received data to the unit of the twisted pair medium PHY chip; the unit of the twisted pair medium PHY chip transmits the received data to the twisted pair codec unit; the twisted pair codec unit receives the received The data is subjected to twisted pair encoding processing and then sent to the twisted pair analog-to-digital conversion unit; the twisted pair analog-to-digital conversion unit converts the received data into an analog signal and transmits it to the twisted pair medium interface unit; the twisted pair medium interface
  • the coaxial line coding process performed by the coaxial codec unit can make the data suitable for transmission in the coaxial line, and the coaxial line decoding process is the inverse process of the coaxial line coding process;
  • the twisted pair coding process performed by the twisted pair codec unit can make the data suitable for transmission in the twisted pair, and the twisted pair decoding process is the twisted pair coding.
  • the reverse process of rationality The ⁇ interface unit of the twisted pair dielectric PHY chip and the ⁇ interface unit of the coaxial medium PHY chip complete the existing physical layer processing on the received and transmitted data (ie, the corresponding physical data when the data is transmitted between the MAC chip and the PHY chip) Layer processing), will not repeat here.
  • the entire relay device can consider using only one reference clock.
  • a buffer memory module is added between the two PHY chips shown in FIG. 2 to eliminate different receive clock bands of two different media interfaces. Minor differences. This is because the two media interfaces are all used to extract the transmission clock of the opposite end of the medium to recover the data.
  • the clock of the LRE twisted pair end is an Ethernet switch.
  • the reference clock, the clock on the coaxial media side is the reference clock of the computer.
  • the two PHY chips shown in FIG. 2 first transmit the reference clock of the ⁇ interface to the buffer storage module; during the data transmission process, the buffer storage module receives the data from one of the PHY chip interfaces and buffers the data. And transmitting the buffered data to the UI interface of the other PHY chip according to a reference clock of the UI interface of the other PHY chip.
  • a, indoor coaxial line attenuation 100 m coaxial line attenuation is about 2dB, indoor coaxial line length is generally about 15 meters, the corresponding attenuation is about 0.5dB;
  • the insertion loss of the indoor 3 distributor is 7 dB, and the isolation loss of the indoor 3 distributor is at least 22 dB;
  • the insertion loss of the indoor 15 m coaxial line plus 3 splitter is 7.5 dB, and the isolation loss of the indoor 3 splitter is at least 22 dB.
  • a data can be selected between 7.5 and 22 dB, such as 15 dB, as the coaxial network penetration attenuation parameter of the coaxial medium PHY chip. This parameter ensures that the coaxial line and the distributor are penetrated, and that the reflected signal does not interfere with other coaxial access points in the user's room.
  • a coaxial line gain unit is added to the coaxial medium PHY chip for amplifying the signal from the twisted pair to the coaxial line to cancel the coaxial network. Signal attenuation in .
  • a twisted pair gain unit is added to the twisted pair dielectric PHY chip for amplifying the signal from the coaxial line to the twisted pair to cancel the twisted pair Signal attenuation in the network.
  • the wideband data signals can use all available spectrum resources on the twisted pair, while the indoor coaxial cable has cable TV signals for transmission, broadband data signals and cable TV signals for shared use.
  • Coaxial spectrum resources The spectrum used for broadband data transmission of this coaxial line avoids the spectrum resources of the cable television signal.
  • the physical layer coding method used for broadband data to avoid the cable television signal to one or more suitable coding methods.
  • the high speed broadband data can be sent to each access point in the user's room by means of the coaxial line in the user's room, which avoids the technical defects of the indoor telephone line, and the above in the present invention Following the scenario, only two baseband PHY chips are included, which is relatively inexpensive.
  • the existing indoor coaxial network is a bus type network
  • the technical solution of the present invention is full duplex
  • the solution of the present invention It is only suitable for the application scenario of single high-speed access point technology in the user's room.
  • FIG. 3 is a block diagram showing the composition of a relay device according to an embodiment of the present invention.
  • the relay device is configured to relay high-speed broadband data transmitted by the twisted pair to a coaxial network in the user room.
  • the relay device includes: a twisted pair medium PHY module and a coaxial medium PHY. Module, where
  • the twisted pair medium PHY module is configured to receive data transmitted by the twisted pair, perform analog-to-digital conversion processing, perform twisted pair decoding processing, and send the twisted pair decoded data to the coaxial medium PHY module; Receiving data from the coaxial medium PHY module, performing twisted pair encoding processing, performing digital-to-analog conversion processing, and transmitting the digital-to-analog converted data through the twisted pair;
  • the coaxial medium PHY module is configured to receive data from the twisted pair medium PHY module, perform coaxial to digital-to-analog conversion processing after the coaxial line encoding process, and transmit the digital-to-analog converted data through the coaxial line;
  • the data transmitted on the same axis is subjected to analog-to-digital conversion processing, and then subjected to coaxial line decoding processing, and the data decoded by the coaxial line is sent to the twisted pair line.
  • Media PHY module is configured to receive data from the twisted pair medium PHY module, perform coaxial to digital-to-analog conversion processing after the coaxial line encoding process, and transmit the digital-to-analog converted data through the coaxial line;
  • the data transmitted on the same axis is subjected to analog-to-digital conversion processing, and then subjected to coaxial line decoding processing, and the data decoded by the coaxial line is sent to the twisted pair line.
  • Media PHY module is configured to receive data from the
  • the twisted pair medium PHY module includes: a twisted pair medium interface unit, a twisted pair analog-to-digital conversion unit, and a twisted pair codec unit;
  • the coaxial medium PHY module includes: a coaxial line a medium interface unit, an in-line analog-to-digital conversion unit, and a coaxial line codec unit;
  • the twisted pair medium interface unit is configured to receive data transmitted by the twisted pair and send the data to the twisted pair analog-to-digital conversion unit, receive the data sent by the twisted pair analog-to-digital conversion unit, and send the data to the twisted pair transmission;
  • the twisted pair analog-to-digital conversion unit is configured to receive data sent by the twisted pair medium interface unit, perform analog-to-digital conversion processing, and then send the data to the twisted pair codec unit, and receive the data sent by the twisted pair codec unit. After the mode conversion process is sent to the twisted pair medium interface unit;
  • the twisted pair codec unit is configured to receive data sent by the twisted pair analog-to-digital conversion unit, perform twisted pair decoding processing, and then send the data to the coaxial line codec unit, and receive data sent by the coaxial line codec unit to perform dual After the stranding code is processed, it is sent to the twisted pair analog-to-digital conversion unit;
  • the coaxial line codec unit is configured to receive data sent by the twisted pair codec unit and perform coaxial line coding processing, and then send the data to a coaxial line analog-to-digital conversion unit; and receive the coaxial line analog-to-digital conversion unit for transmitting The data is subjected to coaxial line decoding processing and then sent to the twisted pair codec unit;
  • the coaxial line analog-to-digital conversion unit is configured to receive data sent by the coaxial line codec unit for digital-to-analog conversion processing, and then send the data to the coaxial line interface unit, and receive data sent by the coaxial line interface unit, and perform mode The number conversion process is sent to the coaxial line codec unit;
  • the coaxial medium interface unit is configured to receive a coaxial line analog to digital conversion unit The data is sent to the coaxial line transmission, and the data transmitted by the coaxial line is received and sent to the coaxial analog-to-digital conversion unit.
  • the device further includes: a buffer storage module, configured to buffer data sent by the twisted pair medium PHY module and the coaxial medium PHY module to the other party.
  • the buffer memory module eliminates the problem of different data rates due to small errors between the received clocks of the twisted pair media PHY module and the coaxial media PHY module.
  • the twisted pair medium PHY module and the coaxial line PHY module first send their own reference clocks connected to the interface of the buffer storage module to the buffer storage module; when the data flow direction is from the twisted pair medium PHY module to the same In the axial media PHY module, the buffer storage module receives the data from the twisted pair media PHY module, buffers the data, and transmits the buffered data to the coaxial medium PHY according to the interface reference clock of the coaxial medium PHY module.
  • the buffer storage module receives the data from the coaxial medium PHY module and then buffers the storage, and according to the twisted pair medium PHY module
  • the interface reference clock sends the buffered data to the twisted pair media PHY module.
  • the twisted pair medium PHY module further includes: a twisted pair gain unit, configured to receive data from the twisted pair analog-to-digital conversion unit, perform signal amplification processing, and send the signal to the twisted pair medium interface unit. .
  • the twisted pair gain unit compensates for signal attenuation in the twisted pair network,
  • the coaxial medium PHY module further includes: a coaxial gain unit for receiving data from the coaxial analog-to-digital conversion unit, performing signal amplification processing, and transmitting to the coaxial medium interface unit.
  • the coaxial gain unit compensates for the attenuation of the coaxial network and its distributors.
  • the coaxial medium PHY module may further include: a physical layer coding unit (not shown in FIG. 3), configured to receive from the same
  • the axis codec unit transmits data, performs physical layer coding, and then sends the data to the coaxial line analog-to-digital conversion unit.
  • the physical layer coding process causes the signal spectrum of the data transmitted on the coaxial line to avoid the cable television. The spectrum of the signal.
  • the twisted pair medium PHY module is a twisted pair medium physical layer PHY chip, and the twisted pair medium PHY chip adopts a balanced 100 ohm impedance model design;
  • the coaxial line medium PHY module is the same Axial dielectric PHY chip, which is designed with a single-ended 75 ohm impedance model.
  • the twisted pair medium PHY module further includes a unit, and the coaxial medium PHY module further includes a unit, which has been drawn in FIG.
  • the twisted pair medium PHY module of the present invention receives the data transmitted by the twisted pair, performs the twisted pair decoding process, and sends the data to the coaxial medium PHY module; the coaxial medium PHY module will come from the twisted pair line.
  • the data of the medium PHY module is coaxially encoded and transmitted through the coaxial line.
  • the coaxial medium PHY module receives the data transmitted by the coaxial line, performs coaxial decoding processing, and sends the data to the twisted pair medium PHY.
  • the twisted pair medium PHY module can perform twisted pair encoding processing on the data from the coaxial medium PHY module, and then transmit the twisted pair through the twisted pair, so that when the high-speed broadband is connected by using the twisted pair cable,
  • the indoor coaxial cable network is used to complete the broadband data transmission to different access points in the user's indoors, thereby effectively solving the problem of high-speed broadband broadband connection caused by the characteristics of the indoor telephone line.

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Description

数据传输方法和中继装置
技术领域
本发明涉及数据通信技术领域， 尤指数据传输方法和中继装置。 发明背景
宽带接入到户技术包括甚高速数字用户环路 （ VDSL , Very-high-bit-rate Digital Subscriber loop )技术和长巨离以太网（ LRE, Long Range Ethernet )技术。 VDSL和 LRE技术可以使用电话双绞线 接入到户。
但是， VDSL或 LRE在借助双绞线进行高速宽带接入服务时， 遇到的用户室内电话线网络的技术障碍很大， 往往是高速宽带 ( 100Mbps ) 能够到达用户门口， 但却进不了各个房间的电话线接入 点。 这是因为用户室内的电话线网络的以下几个特点造成的：
( 1 ) 用户室内的电话线网络是一个分叉网络， 分叉网络会造成 高速信号的反射和折射， 叠加以后形成干扰。 目前， 高速 VDSL只能 到达用户室内电话线的分叉点前，而不能像低速 ADSL那样到达每个 房间的接入点。
( 2 ) 室内的电话线网络多采用扁平线， 而非双绞线。 扁平线对 信号的衰减明显要大于双绞线，室内十几米的扁平线对信号的衰减较 大。
( 3 ) 双绞线有时候到不了用户希望接入的位置。 比如在开展 IPTV 业务的时候， 用户客厅放置电视机的位置和放置电话机的位置 不同， 例如， 分别放置在沙发的一面和另一面， 这就造成用户在电视 机的位置处接不了 IPTV业务需要的宽带。
为了解决上述电话双绞线下的室内高速宽带接入遇到的技术难 题， 本申请的发明人想到了室内有线电视同轴网络。 用户室内的有线 电视同轴线资源是具有普遍性的，且室内有线电视同轴网络有以下特 点：
( 1 ) 同轴线的信号传输质量并不比双绞线差， 同轴线的传输频 语是 0 ~ lGHz, 明显要高于网线或电话线。
( 2 ) 现有的室内同轴网络多采用分支分配器无源器件组成多点 的网络，这些无源器件在抑制分支网络的多点干扰设计方面有很强的 针对' 1 "生。
以一个六分配器为例， 其具有一个输入 （IN ) 端口和五个输出 ( OUT )端口， 作用是将输入端口输入的电视信号能量平均分配到各 个输出端口。 输入和输出端口之间衰减较大。 标称工作频率范围是 5MHz ~ 1GHz, 实测的工作频率范围是 0.3MHz ~ 1GHZ。
分配器的每个端口都有较强的反射损耗，可大大降低反射信号对 输入信号的干扰； 另外， 不同端口之间都有较强的相互隔离损耗， 可 消除不同端口之间的相互干扰。国家广电标准规定的用户室内广泛应 用的 2/3/4分配器的参数如表 1所示：
Figure imgf000004_0001
5 ~ 65MHz > 22
相
互 65 ~ 550MHz > 25
2 隔 dB
550 ~ 750MHz > 22
离
750 ~ > 22
1000MHz
5 ~ 65MHz > 14
反
射 65 ~ 550MHz > 16
3 损 dB
550 ~ 750MHz > 14
耗
750 ~ > 14
1000MHz
4 蔽衰减 dB > 100
表 1
从表 1可以看出， 室内分配器在消除网络的多点反射和干扰方面 有针对性的参数设置和要求。
综上所述， VDSL或 LRE在借助双绞线进行高速宽带接入服务 时， 由于用户室内电话线网络的特点遇到了很大的障碍。 而同时， 用 户室内的有线电视同轴网络相对于用户室内的电话线网络而言具有 较好的性能， 是可利用的资源。 发明内容
本发明提供了两种数据传输方法， 该两种方法使得在借助双绞线 进行高速宽带入户时，能够利用室内的同轴线网络完成到用户室内不 同接入点的宽带数据传输。
本发明还提供了一种中继装置， 该装置使得在借助双绞线进行高 速宽带入户时，能够利用室内的同轴线网络完成到用户室内不同接入 点的宽带数据传输。
为达到上述目的， 本发明的技术方案具体是这样实现的： 本发明公开了一种数据传输方法，利用双绞线进行宽带接入到户 的服务， 且用户室内的宽带网络使用同轴线实现， 该方法包括： 接收双绞线传输的数据，进行模数转换处理后进行双绞线解码处 理；将双绞线解码处理后的数据进行同轴线编码处理后进行数模转换 处理；将所述进行同轴线编码处理后进行数模转换处理的数据通过同 轴线传输。
本发明还公开了一种数据传输方法，利用双绞线进行宽带接入到 户的服务， 且用户室内的宽带网络使用同轴线实现， 该方法包括： 接收同轴线传输的数据，进行模数转换处理后进行同轴线解码处 理；将同轴线解码处理后的数据进行双绞线编码处理后进行数模转换 处理；将所述进行双绞线编码处理后进行数模转换处理的数据通过双 绞线传输。
本发明还公开了一种中继装置， 该中继装置包括： 双绞线介质
PHY模块和同轴线介质 PHY模块， 其中，
双绞线介质 PHY模块， 用于接收双绞线传输的数据， 进行模数 转换处理后进行双绞线解码处理，将双绞线解码处理后的数据发送至 同轴线介质 PHY模块； 用于接收来自同轴线介质 PHY模块的数据， 进行双绞线编码处理后进行数模转换处理，将数模转换处理后的数据 通过双绞线传输；
同轴线介质 PHY模块，用于接收来自双绞线介质 PHY模块的数 据， 进行同轴线编码处理后进行数模转换处理， 将数模转换处理后的 数据通过同轴线传输； 用于接收同轴线传输的数据， 进行模数转换处 理后进行同轴线解码处理，将同轴线解码处理后的数据发送至双绞线 介质 PHY模块。
由上述技术方案可见， 本发明这种接收双绞线传输的数据，依次 进行模数转换处理、 双绞线解码处理、 同轴线编码处理和数模转换处 理后过同轴线传输；接收同轴线传输的数据，依次进行模数转换处理、 同轴线解码处理、双绞线编码处理和数模转换处理后通过双绞线传输 的技术方案， 使得在借助双绞线进行高速宽带入户时， 能够利用室内 的同轴线网络完成到用户室内不同接入点的宽带数据传输，从而有效 解决了由于室内电话线的特点造成的双绞线高速宽带的入户难题。 附图简要说明
图 1是本发明实施例一种数据传输方法的流程图；
图 2是本发明实施例将双绞线宽带数据中继到同轴线的图形示意 图；
图 3是本发明实施例一种中继装置的组成接口框图。 实施本发明的方式
本发明的核心思想是： 在借助双绞线进行高速宽带入户时， 利用 室内的同轴线网络完成到用户室内不同接入点的宽带数据传输，在用 户室内实现双绞线介质到同轴线介质的转换。
图 1是本发明实施例一种数据传输方法的流程图。 利用双绞线进 行宽带接入到户的服务， 且用户室内的宽带网络使用同轴线实现， 则 如图 1所示， 该方法包括以下步骤：
步骤 101 , 接收双绞线传输的数据， 进行模数转换处理后进行双 绞线解码处理；将双绞线解码处理后的数据进行同轴线编码处理后进 行数模转换处理；将所述进行同轴线编码处理后进行数模转换处理的 数据通过同轴线传输。
步骤 102, 接收同轴线传输的数据， 进行模数转换处理后进行同 轴线解码处理；将同轴线解码处理后的数据进行双绞线编码处理后进 行数模转换处理；将所述进行双绞线编码处理后进行数模转换处理的 数据通过双绞线传输。
图 1所述的方法使得在借助双绞线进行高速宽带入户时， 能够利 用室内的同轴线网络完成到用户室内不同接入点的宽带数据传输。由 于目前用户室内的有线电视同轴网络是具有普遍性的， 因此本发明的 技术方案不仅解决了现有的双绞线宽带入户所遇到的技术问题，且利 用了现有的可用资源， 成本较低。
为使本发明的目的、 技术方案及优点更加清楚明白， 以下对本发 明进一步详细说明。
图 2是本发明实施例将双绞线宽带数据中继到同轴线的数据传输 方法的图形示意图。 参见图 2, 主要包括以下技术特点：
( 1 ) 将双绞线宽带数据中继到同轴线的中继装置主要包括： 双 绞线介质 PHY模块和同轴线介质 PHY模块
在本发明的一个实施例中双绞线介质 PHY 模块和同轴线介质 PHY模块可以分别采用现有的两个物理层 （PHY ) 芯片实现， 其中， 一个是作为双绞线介质 PHY模块的双绞线介质 PHY芯片，另一个是 作为同轴线介质 PHY模块的同轴线介质 PHY芯片。双绞线介质 PHY 芯片采用平衡式的 100欧姆阻抗模型设计， 该 PHY芯片对介质的接 口管脚至少是两个管脚， 这视双绞线是一对线还是两对线而定， 且阻 抗是 100欧姆； 而同轴线介质 PHY芯片为单端的 75欧姆阻抗模型设 计， 该 PHY芯片对介质的接口是一个管脚， 且阻抗是 75欧姆。
参见图 2, 双绞线介质 PHY芯片包括： 双绞线介质接口单元、 双绞线模数转换单元、 双绞线编解码单元和 ΜΠ (媒体独立接口） 单元。 同轴线介质 PHY芯片包括： ΜΠ单元、 同轴线编解码单元、 同轴线模数转换单元和同轴线介质接口单元。
参见图 2,高速宽带数据从双绞线到同轴线的数据传输过程包括： 双绞线介质接口单元接收来自双绞线的模拟信号并发送给双绞线模 数转换单元；双绞线模数转换单元将模拟信号转换为数字信号后发送 给双绞线编解码单元；双绞线编解码单元完成双绞线解码处理后发送 至双绞线介质 PHY芯片的 ΜΠ单元； 双绞线介质 PHY芯片的 ΜΠ 单元将所接收的数据发送至同轴线介质 PHY芯片的 ΜΠ单元； 同轴 线介质 PHY芯片的 ΜΠ单元将所接收的数据发送至同轴线编解码单 元； 同轴线编解码单元对所接收的数据进行同轴线编码处理后发送至 同轴线模数转换单元； 同轴线模数转换单元将所接收的数据转换成模 拟信号后发送至同轴线介质接口单元； 同轴线介质接口单元间所接收 的数据发送至同轴线。
相应地， 数据从同轴线到双绞线的传输过程包括： 同轴线介质接 口单元接收来自同轴线的模拟信号并发送给同轴线模数转换单元； 同 轴线模数转换单元将模拟信号转换为数字信号后发送给同轴线编解 码单元； 同轴线编解码单元完成同轴线解码处理后发送至同轴线介质 PHY芯片的 ΜΠ单元； 同轴线介质 PHY芯片的 ΜΠ单元将所接收的 数据发送至双绞线介质 PHY芯片的 ΜΠ单元；双绞线介质 PHY芯片 的 ΜΠ单元将所接收的数据发送至双绞线编解码单元；双绞线编解码 单元对所接收的数据进行双绞线编码处理后发送至双绞线模数转换 单元；双绞线模数转换单元将所接收的数据转换成模拟信号后发送至 双绞线介质接口单元；双绞线介质接口单元间所接收的数据发送至双 绞线。
在上述过程中， 同轴线编解码单元所完成的同轴线编码处理可以 使得数据适于在同轴线中传输，而同轴线解码处理则是同轴线编码处 理的逆过程； 同样， 双绞线编解码单元所完成的双绞线编码处理可以 使得数据适于在双绞线中传输，而双绞线解码处理则是双绞线编码处 理的逆过程。双绞线介质 PHY芯片的 ΜΠ接口单元和同轴线介质 PHY 芯片的 ΜΠ接口单元对接收和发送的数据完成现有的物理层处理（即 数据在 MAC芯片和 PHY芯片之间传输时对应的物理层处理）， 这里 不再复述。
此外， 在实际应用当中本申请的发明人还考虑了如下（2 ) ~ ( 4 ) 中所提到的问题。
( 2 ) 由于中继装置两侧的数据速率相等， 即双绞线中的传输的 数据速率和同轴线中传输的数据速率相等，所以整个中继装置可以考 虑只采用一个参考时钟。 但是， 考虑到时钟是有误差的， 因此， 在本 发明的一个实施例中， 在图 2所示的两个 PHY芯片之间增加緩沖存 储模块， 以消除两个不同介质接口的不同接收时钟带来的微小差异。 这是因为两个介质接口都是提取介质对端的发送时钟来恢复数据，在 LRE双绞线入户再通过同轴线到各个房间的计算机应用情况下， LRE 双绞线端的时钟是以太网交换机的参考时钟， 同轴介质端的时钟是计 算机的参考时钟， 这两个时钟会有微小的差异， 需要采用緩沖存储模 块加以消除。
具体为： 图 2所示的两个 PHY芯片先将自身的 ΜΠ接口的参考 时钟发送给緩沖存储模块； 在数据传输过程中， 緩沖存储模块接收来 自其中一个 PHY芯片 ΜΠ接口的数据后进行緩沖存储， 并根据另一 个 PHY芯片的 ΜΠ接口的参考时钟将所緩沖存储的数据发送给所述 另一个 PHY芯片的 ΜΠ接口。
( 3 )作为同轴线介质接口的同轴线介质 PHY芯片， 需要考虑适 当的室内同轴网络穿透衰减
在实际中， 不仅仅需要考虑室内同轴线的传输衰减， 还需要考虑 室内分支分配器的衰减， 具体是在同轴线介质 PHY芯片中， 对宽带 数据信号进行信号放大处理， 以补偿室内同轴网络穿透衰减。 但是增 益要适度， 太大会增加成本， 带来隐患。
下面给出本发明实施例中的衰减计算方法：
a、 室内同轴线的衰减： 100米的同轴线的衰减大约为 2dB , 室内 同轴线的长度一般为 15米左右， 对应的衰减大约是 0.5dB;
b、 室内分配器的衰减
如表 1所示， 室内 3分配器的插入损耗是 7dB , 室内 3分配器的 隔离损耗至少是 22dB;
因此， 室内 15米同轴线加上 3分配器的插入损耗是 7.5dB , 室内 3分配器的隔离损耗至少是 22dB。这个时候可以在 7.5 ~ 22dB之间选 取一个数据， 比如 15dB, 作为同轴线介质 PHY芯片的同轴网络穿透 衰减参数。 这个参数既能保证穿透同轴线和分配器， 又能保证其反射 信号不会对用户室内的其它同轴接入点带来干扰。
为此， 在本发明的一个实施例中， 在同轴线介质 PHY 芯片中增 加同轴线增益单元， 用于对由双绞线到同轴线的信号的进行放大处 理， 以抵消同轴网络中的信号衰减。
同理， 作为双绞线介质接口的双绞线介质 PHY 芯片， 也需要考 虑适当的双绞线网络的衰减。 为此， 在本发明的一个实施例中， 在双 绞线介质 PHY芯片中增加双绞线增益单元， 用于对由同轴线到双绞 线的信号的进行放大处理， 以抵消双绞线网络中的信号衰减。
( 4 )作为同轴线介质接口的同轴线介质 PHY芯片， 需要考虑适 当的物理层编码方式， 以避开有线电视信号的频谱
由于双绞线上只有宽带数据信号在传输， 宽带数据信号可以使用 双绞线上的所有可用频谱资源，而室内的同轴线上有有线电视信号在 传输， 宽带数据信号和有线电视信号共享使用同轴线的频谱资源， 因 此同轴线的宽带数据传输所使用的频谱要避开有线电视信号的频谱 资源。 至于宽带数据采用何种物理层编码方式， 以避开有线电视信号 到一种或多种合适的编码方式。
这样在双绞线宽带入户的情况下， 可以借助用户室内的同轴线， 将高速宽带数据送到用户室内的各个接入点，规避了室内电话线的技 术缺陷，并且本发明的上述中继方案中只包括两个基带的 PHY芯片， 成本比较便宜。
但是需要说明的是， 由于现有的室内同轴网络是总线型网络， 而 本发明的技术方案是全双工的，所以如果直接利用现有的室内总线型 同轴网络，则本发明的方案只适合于用户室内的单高速接入点技术的 应用场景。
图 3是本发明实施例一种中继装置的组成接口框图。该中继装置 用于将双绞线传输的高速宽带数据中继到用户室内的同轴线网络，如 图 3所示，该中继装置包括：双绞线介质 PHY模块和同轴线介质 PHY 模块， 其中，
双绞线介质 PHY模块， 用于接收双绞线传输的数据， 进行模数 转换处理后进行双绞线解码处理，将双绞线解码处理后的数据发送至 同轴线介质 PHY模块； 用于接收来自同轴线介质 PHY模块的数据， 进行双绞线编码处理后进行数模转换处理，将数模转换处理后的数据 通过双绞线传输；
同轴线介质 PHY模块，用于接收来自双绞线介质 PHY模块的数 据， 进行同轴线编码处理后进行数模转换处理， 将数模转换处理后的 数据通过同轴线传输； 用于接收同轴线传输的数据， 进行模数转换处 理后进行同轴线解码处理，将同轴线解码处理后的数据发送至双绞线 介质 PHY模块。
在图 3中， 所述双绞线介质 PHY模块包括： 双绞线介质接口单 元、双绞线模数转换单元和双绞线编解码单元； 所述同轴线介质 PHY 模块包括： 同轴线介质接口单元、 同轴线模数转换单元和同轴线编解 码单元； 其中：
所述双绞线介质接口单元，用于接收双绞线传输的数据并发送至 双绞线模数转换单元，接收双绞线模数转换单元发送的数据并发送至 双绞线传输；
所述双绞线模数转换单元，用于接收双绞线介质接口单元发送的 数据， 进行模数转换处理后发送至双绞线编解码单元， 接收双绞线编 解码单元发送的数据进行数模转换处理后发送至双绞线介质接口单 元；
所述双绞线编解码单元，用于接收双绞线模数转换单元发送的数 据进行双绞线解码处理后发送至同轴线编解码单元，接收同轴线编解 码单元发送的数据进行双绞线编码处理后发送至双绞线模数转换单 元；
所述同轴线编解码单元，用于接收双绞线编解码单元发送的数据 进行同轴线编码处理后发送至同轴线模数转换单元；用于接收同轴线 模数转换单元发送的数据进行同轴线解码处理后发送至双绞线编解 码单元；
所述同轴线模数转换单元，用于接收同轴线编解码单元发送的数 据进行数模转换处理后发送至同轴线介质接口单元，接收同轴线介质 接口单元发送的数据， 进行模数转换处理后发送至同轴线编解码单 元；
所述同轴线介质接口单元，用于接收同轴线模数转换单元发送的 数据并发送至同轴线传输，接收同轴线传输的数据并发送至同轴线模 数转换单元。
如图 3所示， 该装置进一步包括： 緩沖存储模块， 用于緩存双绞 线介质 PHY模块和同轴线介质 PHY模块发送给对方的数据。緩沖存 储模块可以消除双绞线介质 PHY模块和同轴线介质 PHY模块的接收 时钟之间的微小误差带来的数据速率不同的问题。 具体为： 双绞线介 质 PHY模块和同轴线介质 PHY模块均先将自身的与緩沖存储模块所 连接接口的参考时钟发送给緩沖存储模块； 当数据流向是从双绞线介 质 PHY模块到同轴线介质 PHY模块时，緩沖存储模块接收来自双绞 线介质 PHY模块的数据后进行緩沖存储，并根据同轴线介质 PHY模 块的接口参考时钟将所緩沖存储的数据发送给同轴线介质 PHY 模 块； 同样当数据流向是从同轴线介质 PHY模块到双绞线介质 PHY模 块时， 緩沖存储模块接收来自同轴线介质 PHY模块的数据后进行緩 沖存储， 并根据双绞线介质 PHY模块的接口参考时钟将所緩沖存储 的数据发送给双绞线介质 PHY模块。
如图 3所示， 所述双绞线介质 PHY模块进一步包括： 双绞线增 益单元， 用于接收来自双绞线模数转换单元的数据， 进行信号放大处 理后发送至双绞线介质接口单元。双绞线增益单元可以补偿双绞线网 络中的信号衰减、
所述同轴线介质 PHY模块进一步包括： 同轴线增益单元， 用于 接收来自同轴线模数转换单元的数据，进行信号放大处理后发送至同 轴线介质接口单元。 同轴线增益单元可以补偿同轴网络以及其中的分 配器的衰减。
在如图 3所示的中继装置中， 所述同轴线介质 PHY模块还可以 进一步包括： 物理层编码单元 （图 3 中并未画出）， 用于接收来自同 轴线编解码单元发送数据，进行物理层编码后处理后发送至同轴线模 数转换单元； 其中， 所述物理层编码处理使得所述在同轴线上传输的 数据的信号频谱避开有线电视信号的频谱。
在图 3中， 所述双绞线介质 PHY模块为双绞线介质物理层 PHY 芯片，该双绞线介质 PHY芯片采用平衡式的 100欧姆阻抗模型设计； 所述同轴线介质 PHY模块为同轴线介质 PHY 芯片， 该同轴线介质 PHY芯片采用单端的 75欧姆阻抗模型设计。 此时， 所述双绞线介质 PHY模块还包括 ΜΠ单元， 所述同轴线介质 PHY模块还包括 ΜΠ单 元， 图 3中已画出。
综上所述， 本发明这种双绞线介质 PHY模块接收双绞线传输的 数据， 进行双绞线解码处理后发送至同轴线介质 PHY模块； 同轴线 介质 PHY模块将来自双绞线介质 PHY模块的数据进行同轴线编码处 理后通过所述同轴线传输； 同样， 同轴线介质 PHY模块接收同轴线 传输的数据， 进行同轴线解码处理后发送至双绞线介质 PHY模块； 双绞线介质 PHY模块将来自同轴线介质 PHY模块的数据进行双绞线 编码处理后通过所述双绞线传输的技术方案，使得在借助双绞线进行 高速宽带入户时，能够利用室内的同轴线网络完成到用户室内不同接 入点的宽带数据传输，从而有效解决了由于室内电话线的特点造成的 双绞线高速宽带的入户难题。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明 的保护范围， 凡在本发明的精神和原则之内所做的任何修改、 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、 一种数据传输方法， 其特征在于， 利用双绞线进行宽带接入 到户的服务， 且用户室内的宽带网络使用同轴线实现， 该方法包括： 接收双绞线传输的数据，进行模数转换处理后进行双绞线解码处 理；将双绞线解码处理后的数据进行同轴线编码处理后进行数模转换 处理；将所述进行同轴线编码处理后进行数模转换处理的数据通过同 轴线传输。
2、 如权利要求 1所述的方法， 其特征在于， 该方法进一步包括： 将所述双绞线解码处理后的数据进行緩存处理后再进行同轴线 编码处理。
3、 如权利要求 1所述的方法， 其特征在于， 该方法进一步包括： 将所述进行同轴线编码处理后进行数模转换处理的数据通过同 轴线传输之前进一步进行信号放大处理。
4、 如权利要求 1所述的方法， 其特征在于， 该方法进一步包括： 将数据进行所述同轴线编码处理后， 进一步进行物理层编码处 理， 然后再进行所述数模转换处理并通过同轴线传输；
其中，所述物理层编码处理使得所述在同轴线上传输的数据的信 号频谱避开有线电视信号的频谱。
5、 一种数据传输方法， 其特征在于， 利用双绞线进行宽带接入 到户的服务， 且用户室内的宽带网络使用同轴线实现， 该方法包括： 接收同轴线传输的数据，进行模数转换处理后进行同轴线解码处 理；将同轴线解码处理后的数据进行双绞线编码处理后进行数模转换 处理；将所述进行双绞线编码处理后进行数模转换处理的数据通过双 绞线传输。
6、 如权利要求 5所述的方法， 其特征在于， 该方法进一步包括： 将所述同轴线解码处理后的数据进行緩存处理后再进行双绞线 编码处理。
7、 如权利要求 5所述的方法， 其特征在于， 该方法进一步包括： 将所述进行双绞线编码处理后进行数模转换处理的数据通过双 绞线传输之前进一步进行信号放大处理。
8、 一种中继装置， 其特征在于， 该中继装置包括： 双绞线介质 PHY模块和同轴线介质 PHY模块， 其中，
双绞线介质 PHY模块， 用于接收双绞线传输的数据， 进行模数 转换处理后进行双绞线解码处理，将双绞线解码处理后的数据发送至 同轴线介质 PHY模块； 用于接收来自同轴线介质 PHY模块的数据， 进行双绞线编码处理后进行数模转换处理，将数模转换处理后的数据 通过双绞线传输；
同轴线介质 PHY模块，用于接收来自双绞线介质 PHY模块的数 据， 进行同轴线编码处理后进行数模转换处理， 将数模转换处理后的 数据通过同轴线传输； 用于接收同轴线传输的数据， 进行模数转换处 理后进行同轴线解码处理，将同轴线解码处理后的数据发送至双绞线 介质 PHY模块。
9、如权利要求 8所述的装置，其特征在于，所述双绞线介质 PHY 模块包括： 双绞线介质接口单元、 双绞线模数转换单元和双绞线编解 码单元； 所述同轴线介质 PHY模块包括： 同轴线介质接口单元、 同 轴线模数转换单元和同轴线编解码单元； 其中，
所述双绞线介质接口单元，用于接收双绞线传输的数据并发送至 双绞线模数转换单元，接收双绞线模数转换单元发送的数据并发送至 双绞线传输； 所述双绞线模数转换单元，用于接收双绞线介质接口单元发送的 数据， 进行模数转换处理后发送至双绞线编解码单元， 接收双绞线编 解码单元发送的数据进行数模转换处理后发送至双绞线介质接口单 元；
所述双绞线编解码单元，用于接收双绞线模数转换单元发送的数 据进行双绞线解码处理后发送至同轴线编解码单元，接收同轴线编解 码单元发送的数据进行双绞线编码处理后发送至双绞线模数转换单 元；
所述同轴线编解码单元，用于接收双绞线编解码单元发送的数据 进行同轴线编码处理后发送至同轴线模数转换单元；用于接收同轴线 模数转换单元发送的数据进行同轴线解码处理后发送至双绞线编解 码单元；
所述同轴线模数转换单元，用于接收同轴线编解码单元发送的数 据进行数模转换处理后发送至同轴线介质接口单元，接收同轴线介质 接口单元发送的数据， 进行模数转换处理后发送至同轴线编解码单 元；
所述同轴线介质接口单元，用于接收同轴线模数转换单元发送的 数据并发送至同轴线传输，接收同轴线传输的数据并发送至同轴线模 数转换单元。
10、如权利要求 8所述的装置，其特征在于，该装置进一步包括： 緩沖存储模块，用于緩存双绞线介质 PHY模块和同轴线介质 PHY模 块发送给对方的数据。
11、 如权利要求 9所述的装置， 其特征在于，
所述双绞线介质 PHY模块进一步包括： 双绞线增益单元， 用于 接收来自双绞线模数转换单元的数据，进行信号放大处理后发送至双 绞线介质接口单元；
所述同轴线介质 PHY模块进一步包括： 同轴线增益单元， 用于 接收来自同轴线模数转换单元的数据，进行信号放大处理后发送至同 轴线介质接口单元。
12、 如权利要求 9所述的装置， 其特征在于，
所述同轴线介质 PHY模块进一步包括： 物理层编码单元， 用于 接收来自同轴线编解码单元发送数据，进行物理层编码后处理后发送 至同轴线模数转换单元； 其中， 所述物理层编码处理使得所述在同轴 线上传输的数据的信号频谱避开有线电视信号的频谱。
13、 如权利要求 8所述的装置， 其特征在于，
所述双绞线介质 PHY模块为双绞线介质 PHY芯片，该双绞线介 质 PHY芯片采用平衡式的 100欧姆阻抗模型设计；
所述同轴线介质 PHY模块为同轴线介质 PHY芯片，该同轴线介 质 PHY芯片采用单端的 75欧姆阻抗模型设计。
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