Data transmission method, device, and system

Patent metadata

Field	Value
Publication number	US-2016294990-A1
Application number	US-201615183569-A
Country	US
Kind code	A1
Filing date	Jun 15, 2016
Priority date	Dec 16, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

Embodiments of the present invention relate to the communications field and disclose a data transmission method, apparatus, device, and system, so as to acquire attribution information of a PCSL, and decrease overheads and complexity of identifying a network link during data transmission. The method includes: inserting a feature code block into a physical coding sublayer PCS to form a physical coding sublayer lane PCSL, where the feature code block is used to represent an Ethernet link to which the PCSL belongs; and sending the PCSL. The present invention is used for PCSL attribution identification.

First claim

What is claimed is:

1 . A data transmission method, comprising:
inserting a feature code block into a physical coding sublayer (PCS) to form a physical coding sublayer lane (PCSL), wherein the feature code block is used to represent an Ethernet link to which the PCSL belongs; and sending the PCSL.

2 . The method according to claim 1 , wherein:
there is one feature code block or one alignment marker (AM) at each of locations of which each spacing is a preset quantity of bit blocks in the PCSL, wherein the AM is used to identify a sequence number of the PCSL.

3 . The method according to claim 2 , wherein:
a quantity of consecutive locations, at which there are AMs, of the locations of which each spacing is the preset quantity of bit blocks in the PCSL is not less than a first preset quantity, wherein the first preset quantity is a quantity required to lock an AM; and a quantity of consecutive locations, at which there are feature code blocks, of the locations of which each spacing is the preset quantity of bit blocks in the PCSL is less than a second preset quantity, wherein the second preset quantity is a quantity required to detect out-of-lock of an AM.

4 . The method according to claim 1 , wherein the feature code block comprises a link identity (LinkID) used to identify a sequence number of the Ethernet link to which the PCSL belongs, and the LinkID uses a same coding method as an alignment marker (AM).

5 . The method according to claim 4 , wherein the feature code block further comprises the following information of a transmit end:
an identity (NEG) of Ethernet auto-negotiation, an identity (NdID) of an affiliated node, and an acknowledgement identity (Ack), wherein the NEG, the NdID, the Ack, and the LinkID are used for negotiation, so as to determine the Ethernet link to which the PCSL belongs.

6 . A data transmission method, comprising:
receiving a physical coding sublayer lane (PCSL); and determining, according to a feature code block inserted into the PCSL, an Ethernet link to which the PCSL belongs.

7 . The method according to claim 6 , wherein there is one feature code block or one alignment marker (AM) at each of locations of which each spacing is a preset quantity of bit blocks in the PCSL, wherein the AM is used to identify a sequence number of the PCSL.

8 . The method according to claim 6 , wherein:
the feature code block comprises a link identity (LinkID); and determining, according to a feature code block inserted into the PCSL, an Ethernet link to which the PCSL belongs comprises:
determining, according to the link identity LinkID inserted into the PCSL, the Ethernet link to which the PCSL belongs.

9 . The method according to claim 8 , wherein:
the feature code block further comprises the following information of a transmit end: an identity (NEG) indicating whether Ethernet auto-negotiation is supported, an identity (NdID) of an affiliated node, and an acknowledgement identity (Ack); and determining, according to a feature code block inserted into the PCSL, an Ethernet link to which the PCSL belongs comprises:
determining priorities of the transmit end and a receive end according to an identity NEG indicating whether the receive end supports Ethernet auto-negotiation and the identity NEG, of the transmit end, indicating whether Ethernet auto-negotiation is supported in the received PCSL, wherein a priority of an end that does not support auto-negotiation is higher,
determining the priorities of the transmit end and the receive end according to an identity NdID of a node to which the receive end belongs and the identity NdID of the node to which the transmit end belongs in the received PCSL, and
confirming, according to a link identity number LinkID of the receive end and the link identity number LinkID of the transmit end in the received PCSL, a sequence number of the Ethernet link to which the corresponding PCSL belongs, selecting a LinkID of the end having a higher priority as the home Ethernet link of the PCSL, and ensuring, according to an acknowledgement identity Ack of the receive end and the acknowledgement identity Ack of the transmit end in the received PCSL, that information, determined by the receive end and the transmit end, about the Ethernet link to which the PCSL belongs is consistent.

10 . A transmit end, comprising:
a processor, configured to insert a feature code block into a physical coding sublayer (PCS) to form a physical coding sublayer lane (PCSL), wherein the feature code block is used to represent an Ethernet link to which the PCSL belongs; and one or more network interfaces, configured to send the PCSL formed by the processor.

11 . The transmit end according to claim 10 , wherein:
there is one feature code block or one alignment marker (AM) at each of locations of which each spacing is a preset quantity of bit blocks in the PCSL, wherein the AM is used to identify a sequence number of the PCSL.

12 . The transmit end according to claim 10 , wherein:
a quantity of consecutive locations, at which there are AMs, of the locations of which each spacing is the preset quantity of bit blocks in the PCSL is not less than a first preset quantity, wherein the first preset quantity is a quantity required to lock an AM; and a quantity of consecutive locations, at which there are feature code blocks, of the locations of which each spacing is the preset quantity of bit blocks in the PCSL is less than a second preset quantity, wherein the second preset quantity is a quantity required to detect out-of-lock of an AM.

13 . The transmit end according to claim 10 , wherein the feature code block comprises a link identity (LinkID) used to identify a sequence number of the Ethernet link to which the PCSL belongs, and the LinkID uses a same coding method as an alignment marker AM.

14 . The transmit end according to claim 13 , wherein the feature code block further comprises the following information of the transmit end:
an identity (NEG) indicating whether Ethernet auto-negotiation is supported, an identity (NdID) of an affiliated node, and an acknowledgement identity (Ack), wherein the NEG, the NdID, the Ack, and the LinkID are used for negotiation, so as to determine the Ethernet link to which the PCSL belongs.

15 . A receive end, comprising:
one or more network interfaces, configured to receive a physical coding sublayer lane (PCSL); and a processor, configured to determine, according to a feature code block inserted into the PCSL received by the receiving unit, an Ethernet link to which the PCSL belongs.

16 . The receive end according to claim 15 , wherein there is one feature code block or one alignment marker (AM) at each of locations of which each spacing is a preset quantity of bit blocks in the PCSL, wherein the AM is used to identify a sequence number of the PCSL.

17 . The receive end according to claim 15 , wherein:
the feature code block comprises a link identity (LinkID); and the processing unit is configured to:
determine, according to the LinkID inserted into the PCSL received by the receiving unit, the Ethernet link to which the PCSL belongs.

18 . The receive end according to claim 17 , wherein:
the feature code block further comprises the following information of a transmit end: an identity (NEG) indicating whether Ethernet auto-negotiation is supported, an identity (NdID) of an affiliated node, and an acknowledgement identity (Ack); and the processor is configured to:
determine priorities of the transmit end and the receive end according to an

Assignees

• Huawei Tech Co Ltd

Inventors

• Cao Shiyi

Classifications

• H04L1/0083 Primary

  Formatting with frames or packets; Protocol or part of protocol for error control · CPC title

• H04L69/323 Primary

  in the physical layer [OSI layer 1] · CPC title

• H04L1/0057

  Block codes (H04L1/0061, H04L1/0064 take precedence) · CPC title

• H04L69/14

  Multichannel or multilink protocols · CPC title