CN101741735B - Relay device and uplink and downlink data forwarding methods thereof - Google Patents

Relay device and uplink and downlink data forwarding methods thereof Download PDF

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Publication number
CN101741735B
CN101741735B CN2009102382495A CN200910238249A CN101741735B CN 101741735 B CN101741735 B CN 101741735B CN 2009102382495 A CN2009102382495 A CN 2009102382495A CN 200910238249 A CN200910238249 A CN 200910238249A CN 101741735 B CN101741735 B CN 101741735B
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data
downlink
mii
uplink
ethernet
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CN101741735A (en
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王晓中
韩大庆
徐罕聪
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DONGFANG XINLIAN SCIENCE-TECHNOLOGY Co Ltd BEIJING
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DONGFANG XINLIAN SCIENCE-TECHNOLOGY Co Ltd BEIJING
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Abstract

The embodiment of the invention discloses a relay device and uplink and downlink data forwarding methods thereof. The downlink data forwarding method of the relay device comprises the following steps that: the relay device receives downlink Ethernet MDI data and converts the received downlink Ethernet MDI data into MII data; the relay devices converts the MII data into at least two paths of identical MII data; and the relay device converts the at least two paths of identical MII data into the downlink Ethernet MDI data and outputs the downlink Ethernet MDI data. The relay device provided by the embodiment of the invention is specifically used for building an Ethernet-based IP service access network, has a low cost and can reduce system time delay.

Description

Relay device and method for forwarding uplink and downlink data thereof
Technical Field
The present invention relates to the field of ethernet technologies, and in particular, to a relay device and a method for forwarding uplink and downlink data thereof.
Background
With the growth of IP services and the opening of telecommunication operation markets in China, operators all take the construction of a telecommunication foundation network facing the IP services as a key point for network construction. The IP service access network based on the Ethernet technology can provide standard Ethernet interfaces for users, can be compatible with terminals of all Ethernet interfaces, and does not need additional interface cards or protocol software for the users, so the IP service access realized by using Ethernet equipment is a cheap broadband access network construction technology.
In the research process, the inventor finds that an access network constructed based on ethernet devices is generally divided into local side devices, relay devices and customer premise equipment according to the positions of node devices, but currently, no relay device is specially designed for an access network constructed by means of ethernet devices.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a relay device and a method for forwarding uplink and downlink data thereof, which are specially used for building an IP service access network based on an ethernet.
A relay device for use in an ethernet network, the relay device comprising:
the first conversion unit is used for receiving downlink Ethernet media-dependent interface MDI data, converting the received downlink Ethernet MDI data into media-independent interface MII data and outputting the MII data to the drive unit;
the driving unit is used for receiving the MII data output by the first conversion unit, converting the received MII data into at least two paths of same MII data, and outputting the at least two paths of MII data to at least two corresponding second conversion units respectively;
the at least two second conversion units are respectively used for converting the received MII data into downlink Ethernet MDI data and outputting the downlink Ethernet MDI data;
the at least two third conversion units are respectively used for receiving uplink Ethernet MDI data, converting the received uplink MDI data into MII data and outputting the MII data;
the buffer convergence unit is used for converging the MII data and outputting the converged MII data to the fourth conversion unit;
and the fourth conversion unit is used for converting the aggregated MII data output by the cache aggregation unit into uplink Ethernet MDI data and outputting the uplink Ethernet MDI data.
Optionally, the relay device further includes:
the uplink port is used for receiving downlink Ethernet MDI data and outputting the received downlink MDI data to the first conversion unit;
or,
receiving and outputting the uplink Ethernet MDI data output by the fourth conversion unit;
the first conversion unit is used for receiving downlink Ethernet MDI data output by the uplink port;
and the fourth conversion unit is used for outputting uplink Ethernet MDI data to the uplink port.
Optionally, the relay device further includes:
at least two downlink ports, respectively used for receiving and outputting the downlink Ethernet MDI data output by the at least two second conversion units;
or,
the first conversion unit is used for receiving uplink Ethernet MDI data and outputting the received uplink Ethernet MDI data to the at least two third conversion units respectively;
the at least two downlink ports are in one-to-one correspondence with the at least two second conversion units, and the at least two downlink ports are in one-to-one correspondence with the at least two third conversion units;
the at least two second conversion units are respectively used for outputting downlink Ethernet MDI data to the at least two downlink ports;
the at least two third conversion units are respectively used for receiving the uplink Ethernet MDI data output by the at least two downlink ports.
Optionally, the relay device further includes:
the at least two cache units are respectively in one-to-one correspondence with the at least two third conversion units and are respectively used for caching the MII data output by the corresponding third conversion units;
the cache convergence unit is used for converging the MII data cached by the at least two cache units.
A method for forwarding downlink data by a relay device, the method comprising:
the relay equipment receives downlink Ethernet MDI data and converts the received downlink Ethernet MDI data into MII data;
the relay equipment converts the MII data into at least two paths of same MII data;
and the relay equipment converts the at least two paths of same MII data into downlink Ethernet MDI data respectively and outputs the downlink Ethernet MDI data.
A method for a relay device to forward uplink data, the method comprising:
at least two downlink ports of the relay equipment receive uplink Ethernet MDI data;
the relay equipment converts uplink Ethernet MDI data received by at least two downlink ports into at least two paths of MII data respectively;
the relay equipment gathers the at least two paths of MII data and converts the gathered MII data into uplink Ethernet MDI data;
and the relay equipment outputs the converted uplink Ethernet MDI data.
Optionally, before the relay device aggregates the at least two MII data, the method further includes:
and the relay equipment respectively caches the at least two paths of MII data.
It can be seen that, in the embodiment of the present invention, a relay device dedicated for ethernet is provided, and when receiving downlink ethernet MDI data, may convert one path of downlink ethernet MDI data into at least two paths of same downlink ethernet MDI data and output the same downlink ethernet MDI data, and when receiving uplink ethernet MDI data, may converge at least two paths of uplink ethernet MDI data into one path of uplink ethernet MDI data and output the uplink ethernet MDI data. In addition, the relay device provided by the embodiment of the invention does not need MAC address identification and exchange processing, reduces the data processing flow of the relay process, namely the device complexity, and further reduces the system time delay and the device cost.
Drawings
FIG. 1 is a network diagram of an Ethernet device based access network;
fig. 2 is a schematic structural diagram of a relay device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another relay device according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for forwarding downlink data by a relay device according to an embodiment of the present invention;
fig. 5 is a flowchart of a method for forwarding uplink data by a relay device according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned features and advantages of the embodiments of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
First, the relay device provided in the embodiment of the present invention and the IP service access network based on ethernet device construction to which the relay device belongs are introduced.
The access network based on the Ethernet equipment adopts a standard tree network, and node equipment of the access network can be divided into local side equipment, relay equipment and user side equipment according to different positions. Fig. 1 is a schematic diagram of an access network based on ethernet devices. Wherein 101 is a central office device, 102 is a relay device, and 103 is a customer premise device.
For convenience, a port connected to a higher-level device (i.e., near the root node) is referred to as an upstream port, and a port connected to a lower-level device (i.e., near the tip node) is referred to as a downstream port. An access network constructed based on Ethernet equipment is a network for providing bidirectional data transmission, downlink data (data flowing from a root node to a peripheral node) is shunted to user end equipment through local end equipment and relay equipment, and uplink data (data flowing from the peripheral node to the root node) is converged to an uplink port of the local end equipment through the user end equipment and the relay equipment. The office equipment may be located in a service tandem room of an operator and provide an interface to the IP backbone. The relay equipment can be positioned in a residential building and has functions of downlink data branching and uplink data convergence. The customer premise equipment may be located in every corridor or every floor within a residential building, providing an interface with a customer terminal (e.g., a computer).
The office device, as a root node egress device of the entire IP service access network, needs to have a larger access bandwidth, faster processing capability, and user management capability, and generally employs a high-performance two-layer switch or a three-layer switch. The customer premise equipment has a link function and can be realized by using a two-layer switch, and the port rate of the customer premise equipment is dynamically changed under the control of the local side equipment, so that the minimum access rate of a user is ensured, the maximum access rate of the user is limited, and the Quality of Service (QoS) guarantee of IP services is supported.
The uplink interface of the relay device provided in the embodiment of the present invention is connected to the downlink port of the central office device or the upper-level relay device, and the downlink interface is connected to the lower-level relay device or the user equipment. The function is to distribute the downlink data of the uplink port to each downlink port and to converge the uplink data of the downlink port to the uplink port. Because data exchange does not exist among all downlink ports of the relay equipment provided by the embodiment of the invention, downlink data can be directly sent to user side equipment in a broadcasting mode. Meanwhile, the uplink data received by each downlink port of the relay device provided by the embodiment of the invention does not need to be exchanged, namely, the MAC address is identified and then the identified uplink data is forwarded to the corresponding port, and only the data of each downlink port needs to be cached and converged to the uplink port.
Referring to fig. 2, a schematic structural diagram of a relay device according to an embodiment of the present invention includes:
a first conversion unit 201, configured to receive downlink ethernet Media Dependent Interface (MDI) data, convert the received downlink ethernet MDI data into Media Independent Interface (MII) data, and output the MII data to the driving unit 202;
a driving unit 202, configured to receive the MII data output by the first conversion unit 201, convert the received MII data into at least two paths of identical MII data, and output the at least two paths of MII data to at least two corresponding second conversion units (203-1, 203-2.., 203-n), respectively;
at least two second conversion units (203-1, 203-2, 203-n) respectively used for converting the received MII data into downlink Ethernet MDI data and outputting the data;
at least two third conversion units (204-1, 204-2, 204-n) respectively used for receiving uplink Ethernet MDI data, converting the received uplink MDI data into MII data and outputting the MII data;
the cache convergence unit 205 is configured to converge the MII data, and output the converged MII data to the fourth conversion unit 206;
a fourth converting unit 206, configured to convert the aggregated MII data output by the cache aggregating unit 205 into uplink ethernet MDI data and output the data.
It can be seen that, in the embodiment of the present invention, a relay device dedicated for ethernet is provided, and when receiving downlink ethernet MDI data, may convert one path of downlink ethernet MDI data into at least two paths of same downlink ethernet MDI data and output the same downlink ethernet MDI data, and when receiving uplink ethernet MDI data, may converge at least two paths of uplink ethernet MDI data into one path of uplink ethernet MDI data and output the uplink ethernet MDI data. In addition, the relay device provided by the embodiment of the invention does not need MAC address identification and exchange processing, reduces the data processing flow of the relay process, namely the device complexity, and further reduces the system time delay and the device cost.
Referring to fig. 3, a schematic structural diagram of another relay device according to an embodiment of the present invention is shown, and on the basis of fig. 2, the method may further include:
(1) an uplink port 301, configured to receive downlink ethernet MDI data and output the received downlink MDI data to the first conversion unit 201;
or,
receiving and outputting the uplink ethernet MDI data output by the fourth conversion unit 206;
the first conversion unit 201 is configured to receive downlink ethernet MDI data output by the uplink port 301;
the fourth conversion unit 206 is configured to output the uplink ethernet MDI data to the uplink port 301.
(2) At least two downstream ports (302-1, 302-2.., 302-n) for receiving and outputting the downstream ethernet MDI data outputted by the at least two second conversion units (203-1, 203-2.., 203-n),
or,
the first conversion units are respectively used for receiving the uplink Ethernet MDI data and respectively outputting the received uplink Ethernet MDI data to at least two third conversion units (204-1, 204-2., 204-n);
at least two downstream ports (302-1, 302-2,.., 302-n) are in one-to-one correspondence with at least two second conversion units (203-1, 203-2,.., 203-n), and at least two downstream ports (302-1, 302-2,.., 302-n) are in one-to-one correspondence with at least two third conversion units (204-1, 204-2,.., 204-n);
the at least two second conversion units (203-1, 203-2, 203-n) are respectively used for outputting the downlink Ethernet MDI data to the at least two downlink ports (302-1, 302-2, 302.., 302-n);
the at least two third conversion units (204-1, 204-2,.., 204-n) are respectively used for receiving the uplink Ethernet MDI data output by the at least two downlink ports (302-1, 302-2,.., 302-n).
(3) At least two buffer units (303-1, 303-2,.., 303-n) which are respectively in one-to-one correspondence with the at least two third conversion units (204-1, 204-2,.., 204-n) and are respectively used for buffering MII data output by the corresponding third conversion units;
the cache convergence unit 205 is configured to converge the MII data cached by the at least two cache units.
The above n is a natural number.
In the relay device provided in the embodiment of the present invention, the downlink ethernet MDI data received by the uplink port 301 need not be processed by the MAC layer, and can be sent to all downlink ports only through the driving unit 202, that is, the downlink ethernet MDI data is broadcast to each user end device in the ethernet. The uplink ethernet data of each downlink port is converged by the cache convergence unit 204 to form a path of data and output to the uplink port 301, without MAC address identification and exchange processing, i.e. MAC address identification is performed and then forwarded to the corresponding port.
It can be seen that, in the embodiment of the present invention, a relay device dedicated for ethernet is provided, and when receiving downlink ethernet MDI data, may convert one path of downlink ethernet MDI data into at least two paths of same downlink ethernet MDI data and output the same downlink ethernet MDI data, and when receiving uplink ethernet MDI data, may converge at least two paths of uplink ethernet MDI data into one path of uplink ethernet MDI data and output the uplink ethernet MDI data. In addition, the relay device provided by the embodiment of the invention does not need MAC address identification and exchange processing, reduces the data processing flow of the relay process, namely the device complexity, and reduces the system time delay and the device cost.
In addition, the downstream data is subjected to MAC address filtering by the user end equipment, so that the data of the user end equipment cannot be acquired by other user end equipment, and further, the isolation between user terminals can be ensured.
Referring to fig. 4, a flowchart of a method for forwarding downlink data by a relay device according to an embodiment of the present invention may include the following steps:
step 401: the relay equipment receives downlink Ethernet MDI data and converts the received downlink Ethernet data into MII data;
step 402: the relay equipment converts MII data into at least two paths of same MII data;
step 403: the relay equipment converts at least two paths of same MII data into Ethernet MDI data respectively and outputs the Ethernet MDI data.
Referring to fig. 5, a flowchart of a method for forwarding uplink data by a relay device according to an embodiment of the present invention may include the following steps:
step 501: at least two downlink ports of the relay equipment receive uplink Ethernet MDI data;
step 502: the relay equipment converts uplink Ethernet MDI data received by at least two downlink ports into at least two paths of MII data respectively;
step 503: the relay equipment gathers at least two paths of MII data and converts the gathered MII data into uplink Ethernet MDI data;
step 504: and the relay equipment outputs the converted uplink Ethernet MDI data.
Optionally, for the uplink data, the relay device may further buffer the at least two MII data before aggregating the at least two MII data.
It can be seen that, in the embodiment of the present invention, a relay device dedicated for ethernet is provided, and when receiving downlink ethernet MDI data, may convert one path of downlink ethernet MDI data into at least two paths of same downlink ethernet MDI data and output the same downlink ethernet MDI data, and when receiving uplink ethernet MDI data, may converge at least two paths of uplink ethernet MDI data into one path of uplink ethernet MDI data and output the uplink ethernet MDI data. In addition, the relay device provided by the embodiment of the invention does not need MAC address identification and exchange processing, reduces the data processing flow of the relay process, namely the device complexity, and reduces the system time delay and the device cost.
In addition, the downstream data is subjected to MAC address filtering by the user end equipment, so that the data of the user end equipment cannot be acquired by other user end equipment, and further, the isolation between user terminals can be ensured.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus a necessary hardware platform, and certainly may be implemented by hardware, but in many cases, the former is a better embodiment. With this understanding in mind, all or part of the technical solutions of the present invention that contribute to the background can be embodied in the form of a software product, which can be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods according to the embodiments or some parts of the embodiments of the present invention.
The present invention has been described in detail, and the principle and embodiments of the present invention are explained herein by using specific examples, which are only used to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (5)

1. A relay device, wherein the relay device is for use in an ethernet network, the relay device comprising:
the first conversion unit is used for receiving downlink Ethernet media-dependent interface MDI data, converting the received downlink Ethernet MDI data into media-independent interface MII data and outputting the MII data to the drive unit;
the driving unit is used for receiving the MII data output by the first conversion unit, converting the received MII data into at least two paths of same MII data, and outputting the at least two paths of MII data to at least two corresponding second conversion units respectively;
the at least two second conversion units are respectively used for converting the received MII data into downlink Ethernet MDI data and outputting the downlink Ethernet MDI data;
the at least two third conversion units are respectively used for receiving uplink Ethernet MDI data, converting the received uplink MDI data into MII data and outputting the MII data;
the buffer convergence unit is used for converging the MII data and outputting the converged MII data to the fourth conversion unit;
the fourth conversion unit is configured to convert the aggregated MII data output by the cache aggregation unit into uplink ethernet MDI data and output the uplink ethernet MDI data;
the relay device further includes:
the uplink port is used for receiving downlink Ethernet MDI data and outputting the received downlink MDI data to the first conversion unit;
or,
receiving and outputting the uplink Ethernet MDI data output by the fourth conversion unit;
the first conversion unit is used for receiving downlink Ethernet MDI data output by the uplink port;
the fourth conversion unit is used for outputting uplink Ethernet MDI data to the uplink port;
the relay device further includes:
at least two downlink ports, respectively used for receiving and outputting the downlink Ethernet MDI data output by the at least two second conversion units;
or,
the first conversion unit is used for receiving uplink Ethernet MDI data and outputting the received uplink Ethernet MDI data to the at least two third conversion units respectively;
the at least two downlink ports are in one-to-one correspondence with the at least two second conversion units, and the at least two downlink ports are in one-to-one correspondence with the at least two third conversion units;
the at least two second conversion units are respectively used for outputting downlink Ethernet MDI data to the at least two downlink ports;
the at least two third conversion units are respectively used for receiving the uplink Ethernet MDI data output by the at least two downlink ports.
2. The relay device according to claim 1, wherein the relay device further comprises:
the at least two cache units are respectively in one-to-one correspondence with the at least two third conversion units and are respectively used for caching the MII data output by the corresponding third conversion units;
the cache convergence unit is used for converging the MII data cached by the at least two cache units.
3. A method for forwarding downlink data by a relay device, the method comprising:
the relay equipment receives downlink Ethernet MDI data and converts the received downlink Ethernet MDI data into MII data;
the relay equipment converts the MII data into at least two paths of same MII data;
and the relay equipment converts the at least two paths of same MII data into downlink Ethernet MDI data respectively and outputs the downlink Ethernet MDI data.
4. A method for a relay device to forward uplink data, the method comprising:
at least two downlink ports of the relay equipment receive uplink Ethernet MDI data;
the relay equipment converts uplink Ethernet MDI data received by at least two downlink ports into at least two paths of MII data respectively;
the relay equipment gathers the at least two paths of MII data and converts the gathered MII data into uplink Ethernet MDI data;
and the relay equipment outputs the converted uplink Ethernet MDI data.
5. The method of claim 4, wherein prior to the relay device aggregating the at least two MII data, the method further comprises:
and the relay equipment respectively caches the at least two paths of MII data.
CN2009102382495A 2009-11-23 2009-11-23 Relay device and uplink and downlink data forwarding methods thereof Expired - Fee Related CN101741735B (en)

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CN101388821A (en) * 2008-10-13 2009-03-18 北京东方信联科技有限公司 Access network implementing system and method for bearing all information services of local customer
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