WO2011147378A2

WO2011147378A2 - Data processing method and access node

Info

Publication number: WO2011147378A2
Application number: PCT/CN2011/075398
Authority: WO
Inventors: 傅健新
Original assignee: 华为技术有限公司
Priority date: 2011-06-07
Filing date: 2011-06-07
Publication date: 2011-12-01
Also published as: WO2011147378A3; CN102217241B; CN102217241A

Abstract

The present invention discloses a data processing method and an access node. The data processing method includes: receiving downlink data; determining whether the downlink data is error data; if so, replacing the downlink data with frame gap having the same bandwidth as the downlink data, and sending the replaced data. Another data processing method includes: receiving uplink data; determining whether the uplink data is self-negotiation data; if so, replacing the uplink data with frame gap having the same bandwidth as the uplink data, sending the replaced data, and responding to the uplink data. The embodiment of the present invention also provides an access node.

Description

Data processing method and access node

The embodiments of the present invention relate to an Ethernet access technology, and in particular, to a data processing method and an access node. In the backbone network transmission network, the share of carrier-class Ethernet services is increasing. In the Ethernet service, Gigabit Ethernet (GE) services occupy the largest bandwidth and are one of the mainstream Ethernet services.

With the development of technology, Ethernet has new standards, and higher requirements are also imposed on GE transmission, such as: Precision Measurement Protocol for IEEE Network Measurement and Control System (IEEE 1588, Institute of Electrical and Electronics Engineers 1588) The IEEE1588 protocol is a precise time protocol for synchronous clocks in an Ethernet environment that can reach sub-microsecond accuracy, while existing GE transmission methods are difficult to effectively support the IEEE1588 protocol.

The inventor found in the research that the data transmission mode supported by GE is difficult to effectively support new network protocols, such as the IEEE1588 protocol. When a transmission link of a GE device fails, other GE devices will receive incorrect data. In the process of initiating the auto-negotiation process, the GE device receiving the erroneous data stops transmitting the IEEE1588 protocol data to the transmission network. After the link is restored to normal, the IEEE1588 protocol data is re-issued, so that the clock between the transmission network and the GE device is synchronized. Relationships are difficult to get effective guarantees. For example, in the initial stage of network construction of the transmission network, when initializing the GE network, it is necessary to ensure that both ends of the transmission network have GE equipment to complete the auto-negotiation process and initialize the network.

Summary of the invention

The embodiment of the present invention provides a data processing method and an access node, where the access node processes the received uplink data and downlink data, so that downlink error data cannot be continuously transmitted, and the startup of the auto-negotiation process is avoided. Therefore, the GE device does not stop sending IEEE1588 protocol data, ensuring the synchronization relationship between the transport network and the GE device. At the same time, when the auto-negotiation data is received, the access node can respond to the auto-negotiation process, so that the auto-negotiation process can be completed without the peer device.

The data processing method in the embodiment of the present invention includes: receiving downlink data; determining that downlink data is No, it is erroneous data; if so, the downlink data is replaced with a frame gap having the same bandwidth as the downlink data, and the replaced data is transmitted.

The method for data processing in the embodiment of the present invention includes: receiving uplink data; determining whether the uplink data is auto-negotiation data; if yes, replacing the uplink data with a frame gap having the same bandwidth as the uplink data, transmitting the replaced data, and responding to the uplink data.

The access node in the embodiment of the present invention includes: a data receiver, configured to receive downlink data; a data determining unit, configured to determine whether the downlink data is erroneous data; and a replacement sending unit, configured to: when the downlink data is erroneous data, The downlink data is replaced with a frame gap having the same bandwidth as the downlink data, and the replaced data is transmitted.

The access node in the embodiment of the present invention includes: a receiver, configured to receive uplink data; a determining unit, configured to determine whether the uplink data is auto-negotiating data; and a processing unit, configured to: when the uplink data is auto-negotiating data, The frame gap having the same bandwidth as the uplink data replaces the uplink data, and transmits the replaced data and the response uplink data.

As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages:

By judging the received uplink data and downlink data, data replacement is performed by using a frame gap having the same bandwidth as the downlink error data and the uplink auto-negotiation data, and the replaced data is transmitted, so that the GE device is not received. The auto-negotiation process is initiated by the erroneous data, which effectively improves the reliability of establishing a synchronization relationship between the transmission network and the GE device. At the same time, the auto-negotiation of the GE device is performed by replacing the uplink auto-negotiation data and responding to the read auto-negotiation process. It can be implemented without the response of the peer device, which improves the flexibility of the auto-negotiation process.

DRAWINGS

1 is a structural diagram of a GE network according to an embodiment of the present invention;

2 is a schematic diagram of a data processing method according to an embodiment of the present invention;

3 is another schematic diagram of a method for data processing according to an embodiment of the present invention;

4 is another schematic diagram of a method for data processing according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an access node according to an embodiment of the present invention; FIG.

6 is another schematic diagram of an access node according to an embodiment of the present invention;

FIG. 7 is another schematic diagram of an access node according to an embodiment of the present invention.

detailed description The embodiment of the invention provides a data processing method and an access node, and the access node can process the received data, and can effectively prevent the GE1 device from stopping transmitting the IEEE1588 protocol data because the GE device receives the erroneous data sent by the peer end. The reliability of the synchronization relationship between the transmission network and the GE device is improved. At the same time, during the initialization process of the GE network, the auto-negotiation data sent by the GE device can be responded by the access node, which improves the flexibility of the auto-negotiation process.

For a better understanding of the technology of the present invention, refer to FIG. 1 , which is a structural diagram of a GE network in an embodiment of the present invention, where a GE network includes a transmission network, an access node, and a GE device. In the embodiment shown in FIG. 1, GE device A and GE device B can transmit data to each other through an access node and a transmission network. For example, GE device A sends service data to access node C, and access node C resolves. The service data is encapsulated and sent to the transmission network, and the encapsulated data is transmitted to the GE device B through the transmission network and the access node D. In the embodiment of the present invention, during the initial process of the GE network, or when the link fails, the GE device initiates an auto-negotiation process. The auto-negotiation process can be described as follows: If GE device A initiates the auto-negotiation process, GE device A sends auto-negotiation data to the peer GE device B. If the auto-negotiation data fed back by GE device B is received, the auto-negotiation succeeds. After the auto-negotiation process is successful, GE device A can send the IEEE1588 protocol data. If the auto-negotiation data fed back by GE device B is not received, GE device A will continue to send auto-negotiation data to GE device B. It should be noted that, in the embodiment of the present invention, the priority of the self-negotiating data is higher than the priority of the IE1588 protocol data. Therefore, when the device initiates the auto-negotiation process, the device will preferentially send the auto-negotiation data.

It should be noted that the technical solution described in the embodiments of the present invention may be used in an optical transport network.

(OTN, Optical Transport Network), Synchronous Digital Hierarchy (SDH).

Referring to FIG. 1, an embodiment of a data processing method according to an embodiment of the present invention includes:

201. Receive downlink data.

In the embodiment of the present invention, the transmission network transmits downlink data to the access node.

202. Determine whether the downlink data is an erroneous data.

After receiving the downlink data, the access node determines whether the downlink data is erroneous data. In the embodiment of the present invention, when the transmission link of the device B fails, the access node C will receive the erroneous data.

In the embodiment of the present invention, the access node may decode the downlink data to determine whether the downlink data is Wrong data. The more commonly used decoding rule is 8-bit 10-bit (8B10B) codec. After decoding the downlink data by 8B10B codec, if the obtained binary data does not conform to the decoded rule of the legal data, the downlink data can be determined. For the error data, for example, it is assumed that the 8B10B codec decoded rule is that the number of consecutive 0 bits does not exceed 8 bits. If the downlink data is parsed and decoded, it is found that 10 consecutive bits in the decoded binary data are 0, It can be judged that the downlink data is erroneous data.

8B10B codec is a data encoding/decoding method, which encodes 8-bit data bits into a 10-bit transmission sequence. 8B10B codec is widely used in GE networks, which is a relatively mature technology. Therefore, 8B10B codec The specific use method will not be described here.

203. When the downlink data is erroneous data, replace the downlink data by using a frame gap having the same bandwidth as the downlink data, and send the replaced data.

In the embodiment of the present invention, a frame gap refers to an IDLE code group having a predetermined specific feature. When the GE device receives the IDLE code group, it is regarded as legal data. When the received downlink data is erroneous data, the access node replaces the downlink data with a frame gap having the same bandwidth as the downlink data, and transmits the replaced data. For example: If the access node receives 100 bytes of erroneous data, it will replace the erroneous data with a 100-byte frame gap and then send the replaced 100-byte frame gap. And because the frame gap does not contain any information, it does not affect the device that receives the read frame gap.

Optionally, the embodiment of the present invention may further include the following steps:

204. When the downlink data is not erroneous data, the downlink data is sent.

In the embodiment of the present invention, when the access node determines that the downlink data is not erroneous data, the access node continues to send the downlink data.

In the embodiment of the present invention, when the downlink data is erroneous data, the access node replaces the downlink data by using a frame gap having the same bandwidth as the downlink data, so that the erroneous data is not transmitted to the peer GE device, and the auto-negotiation process is avoided. The initiation of the GE device will not stop transmitting IEEE1588 protocol data, effectively ensuring the synchronization relationship between the transmission network and the GE device, and improving the reliability and flexibility of the system.

The embodiment shown in FIG. 2 introduces the method for the access node to process the downlink data. It should be noted that, during the initialization process of the GE network, the access node may also perform the uplink data. The auto-negotiation data sent by the GE device does not need to be transmitted to the peer device, but the access node responds to the auto-negotiation process. Therefore, the peer device cannot complete the auto-negotiation process, and the clock synchronization relationship can be flexibly and effectively established. Referring to FIG. 3, an embodiment of a data processing method according to an embodiment of the present invention includes:

301. Receive uplink data.

The access node receives the uplink data, where the uplink data is sent by the GE device.

302, determining whether the uplink data is auto-negotiation data, and if yes, executing step 303;

After receiving the uplink data, the access node determines whether the uplink data is auto-negotiation data.

303. When the uplink data is auto-negotiating data, replace the uplink data with a frame gap having the same bandwidth as the uplink data, and send the replaced data and the response uplink data.

When the uplink data is auto-negotiating data, the access node replaces the uplink data with the frame gap having the same bandwidth as the uplink data, and transmits the replaced data and the response uplink data.

Although the auto-negotiation data is replaced by the access node as a frame gap in the embodiment of the present invention, it does not mean that the GE device that sends the uplink data is isolated from the GE device at the other end in the network. First, the present After receiving the uplink data, the access node of the terminal responds to the GE device that sends the uplink data, thereby completing a "handshake" between the access node and the GE device. In this case, in other alternatives In an embodiment, the access node may assume the responsibility of auto-negotiation, and negotiate with other access nodes of the network through other layers to ensure data transmission between the end and the end, and this part of the content is not disclosed in the present invention. The scope of this is not repeated here.

In the embodiment of the present invention, when the uplink data received by the access node is auto-negotiating data, the auto-negotiation data is replaced by the frame gap, and the auto-negotiation process is performed, so that the response of the peer device is not required, the GE device It is able to establish a synchronization relationship with the transmission network, which improves the reliability and flexibility of the network.

For a better understanding of the technology, please refer to FIG. 4, which is an embodiment of a method for data processing according to an embodiment of the present invention, including:

401. Receive uplink data.

The access node receives the uplink data.

402. Decode uplink data.

After receiving the uplink data, the access node decodes the received uplink data. In the embodiment of the present invention, the commonly used 8B10B codec and 8B10B codec are already mature technologies, and here is not Let me repeat.

403, determining whether the decoded uplink data conforms to the pattern of the auto-negotiation data, if yes, executing step 404, and if not, executing step 405;

In the embodiment of the present invention, after the self-negotiating data is decoded by using the 8B10B codec, the data is of a special pattern, and the access node can determine whether the decoded uplink data conforms to the pattern of the auto-negotiating data.

404: Replace uplink data with a frame gap having the same bandwidth as the uplink data, send the replaced data, and respond to the uplink data.

When the decoded uplink data conforms to the pattern of the auto-negotiating data, the uplink data is replaced with a frame gap having the same bandwidth as the uplink data, and the replaced data and the response uplink data are transmitted.

The response to the uplink data means that the access node sends the response data to the GE device that sends the auto-negotiation data, and responds to the auto-negotiation process.

405. Send uplink data.

When the decoded uplink data does not conform to the pattern of the auto-negotiating data, the access node will continue to transmit the uplink data.

In the embodiment of the present invention, the access node replaces the uplink auto-negotiation data with the frame gap, and responds to the auto-negotiation process, so that the GE iS: standby device and the access node complete the self-negotiation process. During the negotiation process, GE devices can be used at both ends of the transmission network to complete the auto-negotiation process and the establishment of synchronization relationships, which improves the reliability and flexibility of the system.

Referring to FIG. 5, an embodiment of an access node in an embodiment of the present invention includes:

a data receiver 501, configured to receive downlink data;

The data determining unit 502 is configured to determine whether the downlink data is erroneous data;

The replacement sending unit 503 is configured to: when the downlink data is erroneous data, replace the downlink data with a frame gap having the same bandwidth as the downlink data, and send the replaced data.

Optionally, in the embodiment of the present invention, the access node may further include:

The data transmitter 504 is configured to send downlink data when the downlink data is not erroneous data. In the embodiment of the present invention, the data receiver 501 receives the downlink data, and the data determining unit 502 determines whether the downlink data is erroneous data. When the downlink data is erroneous data, the replacement transmitting unit 503 uses the same bandwidth as the downlink data. The frame gap replaces the downlink data, and the replaced number is sent. According to. When the downlink data is not erroneous data, the data transmitter 504 will transmit the downlink data.

Referring to FIG. 6, an embodiment of an access node according to an embodiment of the present invention includes:

a receiver 601, configured to receive uplink data.

The determining unit 602 is configured to determine whether the uplink data is auto-negotiation data;

The processing unit 603 is configured to: when the uplink data is auto-negotiating data, replace the uplink data with a frame gap having the same bandwidth as the uplink data, and send the replaced data and the response uplink data.

In the embodiment of the present invention, the receiver 601 of the access node will receive the uplink data, and the determining unit 602 determines whether the uplink data is auto-negotiation data. When the uplink data is auto-negotiation data, the uplink data is used. The frame gap of the same bandwidth replaces the uplink data, sends the replaced data, and responds to the data.

Referring to FIG. 7, an embodiment of an access node according to an embodiment of the present invention includes:

The receiver 601, the determining unit 602, and the processing unit 603 are the same as those described in the embodiment shown in FIG. 6, and are not described herein again.

The determining unit 602 includes:

a decoding unit 701, configured to decode uplink data;

The decoding determining unit 702 is configured to determine whether the decoded uplink data conforms to the pattern of the auto-negotiating data.

In addition, the access node also includes:

The transmitter 703 is configured to send uplink data when the uplink data is not auto-negotiating data.

In the embodiment of the present invention, the determining unit 602 is configured to determine whether the uplink data is auto-negotiating data, and the specific determining manner is: the decoding unit 701 decodes the received uplink data, and then the decoding determining unit 702 determines the decoded uplink data. Whether the pattern of auto-negotiating data is met.

In the embodiment of the present invention, the access node sends the auto-negotiation data to the peer end by replacing the frame auto-negotiation data with the same bandwidth and then transmitting the auto-negotiation process. The equipment can be completed, which improves the flexibility and reliability of the system.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, the above mentioned storage. The medium can be a read only memory, a magnetic disk or a compact disk or the like.

The method and the access node for preventing address conflicts provided by the present invention are performed above. The detailed description of the present invention will be understood by those skilled in the art in light of the embodiments of the present invention. .

Claims

Rights request

A method of data processing, comprising:

Receiving downlink data;

Determining whether the downlink data is erroneous data;

If so, the downlink data is replaced with a frame gap having the same bandwidth as the downlink data, and the replaced data is transmitted.

The method according to claim 1, wherein the method further comprises: when the downlink data is not erroneous data, transmitting the downlink data.

3. A method of data processing, comprising:

Receiving uplink data;

Determining whether the uplink data is auto-negotiation data;

If so, the uplink data is replaced with a frame gap having the same bandwidth as the uplink data, and the replaced data is transmitted and the uplink data is responded to.

The method according to claim 2 or 3, wherein the determining whether the uplink data is auto-negotiation data comprises:

Decoding the uplink data;

Determining whether the decoded uplink data conforms to the pattern of the auto-negotiating data.

The method according to claim 3, wherein the method further comprises: if the uplink data is not auto-negotiating data, transmitting the uplink data.

6. An access node, comprising:

a data receiver, configured to receive downlink data;

a data judging unit, configured to determine whether the downlink data is erroneous data;

And replacing the sending unit, when the current row data is erroneous data, replacing the downlink data with a frame gap having the same bandwidth as the downlink data, and transmitting the replaced data.

The access node according to claim 6, wherein the access node further includes: a data transmitter, configured to send the downlink data when the downlink data is not erroneous data.

8. An access node, comprising:

a receiver, configured to receive uplink data;

a determining unit, configured to determine whether the uplink data is auto-negotiation data; The processing unit is configured to: when the uplink data is auto-negotiating data, replace the uplink data with a frame gap having the same bandwidth as the uplink data, send the replaced data, and respond to the uplink data.

The access node according to claim 8, wherein the determining unit comprises: a decoding unit, configured to decode the uplink data;

The pattern determining unit is configured to determine whether the decoded uplink data conforms to the pattern of the auto-negotiating data.

The access node according to claim 8 or 9, wherein the access node further comprises:

And a transmitter, configured to send the uplink data when the uplink data is not auto-negotiating data.