WO2010078767A1

WO2010078767A1 - A data transmitting method and an ethernet terminal

Info

Publication number: WO2010078767A1
Application number: PCT/CN2009/074181
Authority: WO
Inventors: 于洋
Original assignee: 杭州华三通信技术有限公司
Priority date: 2008-12-29
Filing date: 2009-09-24
Publication date: 2010-07-15
Also published as: CN101447948A

Abstract

A data transmitting method is disclosed, which comprises: receiving data transmitted by a coaxial line to perform analog-to-digital conversion, performing coaxial line decoding on the analog-to-digital converted data, and sending the data to a media access control (MAC) layer of Ethernet terminal (201); receiving data from MAC layer of Ethernet terminal to perform coaxial line encoding, performing digital-to-analog conversion on the coaxial line encoded data, and sending the data to the coaxial line for transmitting (202). An Ethernet terminal is also disclosed. The solution of present invention enables the Ethernet terminal to obtain Ethernet broadband data from coaxial line.

Description

Data transmission method and an Ethernet terminal

The present invention relates to the field of Ethernet technologies, and more particularly to a data transmission method and an Ethernet terminal. Background of the invention

Broadband access-to-home technology such as Very High-Speed-bit Digital Subscriber Loop (VDSL) and Long Range Ethernet (LRE) technology can be accessed using telephone twisted pair Household. However, when VDSL and LRE use high-speed broadband access services through twisted pair cables, due to some inherent shortcomings of indoor telephone line networks, the technical barriers encountered by users' indoor telephone line networks are very large, and often high-speed broadband (100 Mbps) can reach. At the door of the user, but they can't enter the telephone line access point of each room.

To this end, the inventor of the present application proposes a technical solution for completing broadband data transmission to different access points in the user's room by using cable television coaxial resources in the user's room, specifically: high-speed broadband data transmitted to the user's door by means of the twisted pair cable. The broadband device transmits to the coaxial network in the user's room through the relay device, and completes the broadband data transmission to different access points in the user's room through the indoor coaxial network.

Figure 1 is a schematic diagram showing the structure of a relay device that relays twisted pair broadband data to a coaxial line. As shown in Figure 1, the repeater mainly includes a twisted pair medium PHY (physical layer) module and a coaxial medium PHY module.

The twisted pair medium PHY physical layer module is configured to receive data transmitted by the twisted pair, perform analog-to-digital conversion processing, perform twisted pair decoding processing, and then send the data to the same Axis medium PHY module; receiving data from the coaxial medium PHY module, performing twisted pair encoding processing, performing digital to analog conversion processing, and then transmitting the data through the twisted pair; the coaxial medium PHY module for receiving from the double The data of the stranded medium PHY module is subjected to digital-to-analog conversion processing after coaxial line coding processing, and then the data is transmitted through the coaxial line; the data transmitted by the coaxial line is received, and the analog-line conversion processing is performed to perform coaxial line decoding processing. And then send the data to the twisted pair media PHY module.

In FIG. 1, the digital-analog and analog-to-digital conversion processing in the twisted pair medium PHY module is performed by the twisted pair analog-to-digital conversion unit, and the twisted pair coding and decoding unit performs the twisted pair coding and decoding processing; The line analog-to-digital conversion unit performs digital-to-analog and analog-to-digital conversion processing in the coaxial medium PHY module, and the coaxial line encoding and decoding unit performs coaxial line encoding and decoding processing. In addition, the twisted pair media PHY module may further include a twisted pair gain unit for amplifying the signal sent to the twisted pair to compensate for the attenuation of the twisted pair transmission; the coaxial media PHY module may also include A coaxial gain unit for amplifying the signal sent to the coaxial line to compensate for the attenuation of the coaxial transmission.

In FIG. 1, a twisted pair medium interface unit is used to connect a twisted pair and complete the work of transmitting data and receiving data to the twisted pair; likewise, the coaxial medium interface unit is used to connect the coaxial line, And complete the work of transmitting data and receiving data to the coaxial line; ΜΠ (Media Independent Interface) The unit is a standard interface unit in the PHY module.

The above solution as shown in FIG. 1 can relay a full-duplex Ethernet physical layer signal to each coaxial access point in the room through a coaxial network in the user's indoor room. These access points can be two-way set-top boxes or built-in two-way. An Ethernet terminal such as a flat-panel TV of a set-top box. This involves the problem of how these Ethernet terminals extract Ethernet broadband data from the coaxial line.

The current indoor coaxial two-way access technology is based on modulation technology, such as Docsis technology, Homeplug technology. The common feature of these technologies is based on the principle of remote access. Read, many terminals that can access hundreds of households, there are many difficulties in technology implementation, such as convergence noise problem, large line attenuation (70dB), and technical complexity brought by modulation technology. The difficulty of these technical difficulties will significantly increase the implementation cost of the terminal. Therefore, a new method is needed to enable Ethernet terminals to extract Ethernet broadband data from the coaxial line. Summary of the invention

The invention provides a data transmission method that enables an Ethernet terminal to extract Ethernet broadband data from a coaxial line.

The present invention also provides an Ethernet terminal capable of extracting Ethernet broadband data from a coaxial line.

In order to achieve the above object, the technical solution of the present invention is specifically implemented as follows: The present invention discloses a data transmission method, which is applied to an Ethernet broadband data relay that is connected to a household by using a twisted pair cable and forwarded to a user room. The data transmission process between the Ethernet terminal and the coaxial line when the axis is, the method includes:

The data transmitted by the coaxial line is subjected to analog-to-digital conversion processing, and the data processed by the analog-to-digital conversion is subjected to coaxial decoding processing, and then sent to the media access control MAC layer of the Ethernet terminal for processing;

The data received from the MAC layer of the Ethernet terminal is subjected to coaxial coding processing, and the data subjected to the coaxial line coding is digital-to-analog converted and then transmitted to the coaxial line for transmission.

The present invention also discloses an Ethernet terminal, which includes: a coaxial PHY module and a MAC module, wherein

MAC module, used to complete MAC layer processing;

Coaxial media PHY module for receiving data transmitted by coaxial line for analog to digital conversion Transmitting, the analog-to-digital conversion processed data is subjected to coaxial decoding processing, and then sent to the MAC module for processing; for receiving data from the MAC module for coaxial coding processing, and the coaxial line is processed The coded data is digital-to-analog converted and sent to the coaxial line for transmission.

It can be seen from the above technical solution that the data transmitted by the coaxial line of the present invention is subjected to analog-to-digital conversion processing, and the data subjected to the analog-to-digital conversion processing is subjected to coaxial line decoding processing, and then sent to the media of the Ethernet terminal. Access control MAC layer processing; receiving data from the MAC layer for coaxial coding processing, performing digital-to-analog conversion of the coaxial-coded data, and transmitting the data to the coaxial line for transmission, so that the utilization is utilized When the twisted pair access home Ethernet broadband data relay is forwarded to the indoor coaxial line of the user, the user's Ethernet terminal can extract the Ethernet broadband data from the coaxial line. BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic diagram showing the structure of a relay device for relaying twisted pair broadband data to a coaxial line;

2 is a flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 3 is a block diagram showing the structure of an Ethernet terminal according to an embodiment of the present invention. Mode for carrying out the invention

The core idea of the present invention is: in the application scenario of using the twisted pair cable to access the Ethernet broadband data relay to the user's indoor coaxial line, in the physical layer of the Ethernet terminal, performing another with the coaxial line The processing at one end (i.e., the processing of the coaxial medium PHY module in Fig. 1) corresponds to processing, thereby enabling the Ethernet terminal to extract Ethernet broadband data in the coaxial line.

2 is a flow chart of a data transmission method according to an embodiment of the present invention. This method is applied The data transmission process between the Ethernet terminal and the coaxial line when the Ethernet broadband data accessing the home through the twisted pair is forwarded to the coaxial cable in the user room, as shown in FIG. 2, the method includes:

Step 201: Receive data transmitted by the coaxial line to perform analog-to-digital conversion processing, perform coaxial line decoding processing on the data subjected to analog-to-digital conversion processing, and then send the data to the media access control MAC layer of the Ethernet terminal for processing;

Step 202: Receive data from the MAC layer of the Ethernet terminal to perform coaxial line coding processing, perform digital-to-analog conversion on the coaxial-coded data, and send the data to the same axis for transmission.

In the method shown in FIG. 2, the coaxial line decoding process in the step 201 and the coaxial line coding process in step 202 are respectively performed with the coaxial coding process performed by the coaxial line coding module in FIG. The axis decoding process corresponds to that the coaxial decoding process in step 201 is a reciprocal process with the coaxial line coding process performed by the coaxial line codec module in FIG. 1, and the coaxial line coding process in step 201 and The coaxial line decoding process in Figure 1 is a reciprocal process.

In the method shown in Fig. 2, the data subjected to the digital-to-analog conversion after the coaxial line encoding processing is transmitted to the coaxial line for transmission, and further subjected to signal amplification processing. The signal amplification processing here is consistent with the signal amplification processing performed by the coaxial line gain unit in FIG. 1 (ie, the gain factor is the same), so that the problem that both sides cannot communicate normally due to different signal level transmission and reception thresholds can be avoided. .

In the method shown in FIG. 2, after the data is subjected to the coaxial line encoding process, the physical layer coding process is further performed, and then the digital-to-analog conversion is performed, and then transmitted to a coaxial line for transmission; wherein, the physical The layer coding process causes the signal spectrum of the data transmitted on the coaxial line to avoid the spectrum of the cable television signal.

This is because only the wideband data signal is transmitted on the twisted pair, and the wideband data signal can All available spectrum resources on the twisted pair are used, while cable TV signals are transmitted on the indoor coaxial line, broadband data signals and cable TV signals share the spectrum resources of the coaxial line, so the broadband data transmission network of the coaxial line The spectrum used should avoid the spectrum resources of cable television signals. As to what kind of physical layer coding mode is used for broadband data, to avoid the spectrum of the cable television signal, no one will discuss it here, and those skilled in the art can find one or more suitable coding modes according to the existing coding technology.

Moreover, the physical layer coding at the Ethernet terminal is also consistent with the physical layer coding of the data transmitted to the coaxial line by the relay device between the twisted pair and the coaxial line, so that the transmission is performed in the coaxial line. The spectrum of the data is within 5 ~ 65MHz to avoid the spectrum of the cable TV signal.

In addition, since the rate of Ethernet data relayed to the Ethernet terminal access location is not necessarily the Ethernet standard rate (such as 10 Mbps or 100 Mbps), it may be a non-standard rate (such as 33 Mbps or 50 Mbps), and all current Ethernet terminals The Ethernet interface rates are all standard rates. Therefore, in an embodiment of the present invention, before the coaxial line decoded data is sent to the MAC layer, the data rate conversion process is further performed to match the rate of the MAC layer interface; likewise, it will be from the MAC. Before the data of the layer is subjected to the coaxial line encoding process, the data rate conversion process is further performed to match the rate of the physical layer.

The scheme shown in Figure 2 above enables Ethernet terminals to extract Ethernet broadband data from the coaxial line.

FIG. 3 is a block diagram showing the structure of an Ethernet terminal according to an embodiment of the present invention. As shown in FIG. 3, the Ethernet terminal includes: a MAC module and a coaxial media PHY module, wherein the MAC module is configured to complete MAC layer processing;

a coaxial medium PHY module, configured to receive data transmitted by the coaxial line for analog-to-digital conversion processing, and perform the coaxial line decoding processing on the analog-to-digital converted data, and then send Processing to the MAC module; receiving data from the MAC module for coaxial coding processing, performing digital-to-analog conversion on the coaxially encoded data, and transmitting the data to the coaxial line for transmission.

In FIG. 3, the coaxial medium PHY module includes: a coaxial medium interface unit, a coaxial analog to digital conversion unit, and a coaxial line codec unit;

The coaxial medium interface unit is configured to receive data transmitted by the coaxial line and send the data to the coaxial analog-to-digital conversion unit, and receive the data sent by the coaxial analog-to-digital conversion unit and send the data to the coaxial line for transmission;

The coaxial line analog-to-digital conversion unit is configured to receive data sent by the coaxial medium interface unit, perform analog-to-digital conversion processing, and then send the data to the coaxial line codec unit; and receive the data sent by the coaxial line codec unit. , performing digital-to-analog conversion processing and transmitting to the coaxial medium interface unit;

The coaxial line codec unit is configured to receive data sent by the coaxial analog-to-digital conversion unit, perform coaxial line decoding processing, and then send the data to the MAC module; and receive the data sent by the MAC module, and perform coaxial line coding processing. Then sent to the coaxial analog to digital conversion unit.

In FIG. 3, 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.

In FIG. 3, the coaxial medium PHY module further includes: a physical layer coding unit (not shown in FIG. 3), configured to receive data sent by the coaxial codec unit, perform physical layer coding, and then send the data. And a coaxial line analog to digital conversion unit; wherein the physical layer coding process causes a signal spectrum of the data transmitted on the coaxial line to avoid a spectrum of the cable television signal.

In FIG. 3, the coaxial medium PHY module further includes a 媒体 (media independent interface) unit, as shown in FIG. 3, the coaxial media PHY module and the MAC module pass ΜΠ Interface communication.

The Ethernet terminal shown in FIG. 3 further includes: a rate matching module, configured to convert a rate of data from the coaxial line module into a rate matching the MAC module interface rate, and send the rate converted data To the MAC module; for converting the rate of data from the MAC module to a rate matching the interface rate of the coaxial medium PHY module, and transmitting the rate converted data to the coaxial medium PHY module.

In FIG. 3, the rate matching module may be a dual port buffer memory, the read and write on one side of the memory refers to a non-standard rate clock, and the other side reads and writes a reference standard rate clock.

In FIG. 3, the rate supported by the coaxial medium PHY module is the same as the rate supported by the coaxial medium PHY module in the relay device shown in FIG. 1, and the rate includes two standard Ethernet rates and a non-standard Ethernet rate. Happening.

The Ethernet terminal shown in Figure 3 can be a set-top box or a flat-panel TV with a built-in set-top box. The solution of the invention can realize low-cost access of the indoor high-speed Ethernet coaxial terminal in the flat-panel TV of the set-top box or the built-in set-top box, and the potential benefit of the market is 4艮.

In summary, the data of the receiving coaxial line transmission of the present invention performs analog-to-digital conversion processing, and the data subjected to the analog-to-digital conversion processing is subjected to coaxial line decoding processing, and then sent to the media access of the Ethernet terminal. Controlling MAC layer processing; receiving data from the MAC layer for coaxial coding processing, performing digital-to-analog conversion of the coaxial-coded data, and transmitting the data to the coaxial line for transmission, so that When the Ethernet broadband data relay connected to the home is forwarded to the indoor coaxial line of the user, the user's Ethernet terminal can extract the Ethernet broadband data from the coaxial line.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalents, improvements, etc., which are made within the spirit and principles of the present invention, should be included. It is within the scope of the invention.

Claims

Claim

A data transmission method, characterized in that the method is applied between an Ethernet terminal and a coaxial line when an Ethernet broadband data relay that is connected to a home by using a twisted pair is forwarded to a coaxial line in a user room. Data transfer process, the method includes:

The data from the MAC layer of the Ethernet terminal is received for coaxial coding processing, and the data subjected to the coaxial line coding is digital-to-analog converted and transmitted to the coaxial line for transmission.

2. The method of claim 1 wherein:

The coaxial line decoding process and the coaxial line coding process respectively correspond to the coaxial coding process and the coaxial line decoding process in the relay forwarding process.

3. The method according to claim 1, wherein the method further comprises: further performing signal amplification before transmitting the digital-to-analog converted data after the coaxial line encoding process to the coaxial line for transmission deal with.

The method according to claim 1, wherein the method further comprises: performing the coaxial coding process on the data, further performing physical layer coding processing, and then performing the digital-to-analog conversion and transmitting to Coaxial transmission;

Wherein the physical layer coding process causes the signal spectrum of the data transmitted on the coaxial line to avoid the spectrum of the cable television signal.

The method according to any one of claims 1 to 4, wherein the method further comprises:

Sending the data after the coaxial line decoding process to the MAC layer, further Row data rate conversion processing;

Before the data from the MAC layer is subjected to the coaxial line encoding process, the data rate conversion process is further performed.

An Ethernet terminal, comprising: a coaxial medium PHY module and a MAC module, wherein

MAC module, used to complete MAC layer processing;

The coaxial PHY module is configured to receive data transmitted by the coaxial line for analog-to-digital conversion processing, and perform the coaxial line decoding processing on the analog-to-digital converted data, and then send the data to the MAC module for processing; The data from the MAC module is subjected to coaxial coding processing, and the coaxially encoded data is digital-to-analog converted and then transmitted to the coaxial line for transmission.

7. The Ethernet terminal according to claim 6, wherein the coaxial medium PHY module comprises: an coaxial medium interface unit, an coaxial analog to digital conversion unit, and a coaxial line codec unit; ,

8. The Ethernet terminal of claim 6, wherein The coaxial medium PHY module further includes: a coaxial gain unit configured to receive data from the coaxial analog to digital conversion unit, perform signal amplification processing, and transmit to the coaxial medium interface unit.

9. The Ethernet terminal of claim 6, wherein:

The coaxial medium PHY module further includes: a physical layer coding unit, configured to receive data sent by the coaxial line codec unit, perform physical layer coding, and then send the data to the coaxial line analog to digital conversion unit; The physical layer encoding process causes the signal spectrum of the data transmitted on the coaxial line to avoid the spectrum of the cable television signal.

The Ethernet terminal according to any one of claims 6 to 9, wherein the Ethernet terminal further comprises: a rate matching module, configured to convert a rate of data from the coaxial PHY module into a rate at which the MAC module interface rate matches, and the rate converted data is sent to the MAC module; for converting the rate of data from the MAC module to a rate matching the interface rate of the coaxial medium PHY module, and The rate converted data is sent to a coaxial media PHY module.