Data processing method, related device, and system for optical transport network

Patent metadata

Field	Value
Publication number	US-2015071637-A1
Application number	US-201414541950-A
Country	US
Kind code	A1
Filing date	Nov 14, 2014
Priority date	May 15, 2012
Publication date	Mar 12, 2015
Grant date	—

Abstract

Embodiments of the present invention provide a data processing method, related device, and system for an optical transport network. The data processing method for the optical transport network includes: encapsulating service data into an optical payload unit; mapping the optical payload unit to an optical channel data unit; mapping the optical channel data unit to a payload area of an optical burst transport unit; performing electrical-optical conversion on the optical burst transport unit to form an optical burst transport unit; carrying the optical burst transport unit onto an optical timeslot of an optical burst channel; and transmitting the optical burst channel to a line. Technical solutions provided by the present invention can effectively simplify a data processing process and reduce a data processing delay.

First claim

What is claimed is:

1 . A service data processing method for an optical transport network, comprising:
encapsulating service data into an optical payload unit; mapping the optical payload unit to an optical channel data unit; mapping the optical channel data unit to a payload area of an optical burst transport unit; performing electrical-optical conversion on the optical burst transport unit to form an optical burst transport unit; carrying the optical burst transport unit onto an optical timeslot of an optical burst channel; and transmitting the optical burst channel to a line.

2 . The method according to claim 1 , wherein
the mapping the optical channel data unit to a payload area of an optical burst transport unit is specifically: mapping the optical channel data unit, whose signal time length is less than or equal to a frame period of the optical burst transport unit, to the payload area of the optical burst transport unit.

3 . The data processing method according to claim 1 , wherein
the number of electrical timeslots occupied by the optical burst transport unit is the same as the number of optical timeslots occupied by the optical burst channel, wherein the electrical timeslot and the optical timeslot respectively correspond to an electrical layer and an optical layer, and the electrical timeslot and the optical timeslot have same time lengths.

4 . The data processing method according to claim 1 , wherein
the optical burst transport unit further carries a preamble and a guard time.

5 . The data processing method according to claim 1 , wherein
the transmitting the optical burst channel to a line comprises: performing optical burst timeslot multiplexing or optical burst add/drop multiplexing on the optical burst channel and optical burst channels mapped from other optical channel data units, to form an optical burst multiplex section, wherein the optical burst timeslot multiplexing or the optical burst add/drop multiplexing is performed at the optical layer.

6 . The data processing method according to claim 1 , wherein
the transmitting the optical burst channel to a line comprises: performing cross-connection on the optical burst channel and optical burst channels mapped from other optical channel data units, wherein the cross-connection is performed at the optical layer.

7 . The data processing method according to claim 1 , wherein
a bit rate corresponding to the optical channel data unit is not greater than a bit rate of the optical burst transport unit.

8 . The data processing method according to claim 1 , wherein
before the carrying the optical burst transport unit onto an optical timeslot of an optical burst channel, the data processing method comprises: for optical burst channels at different bit rates, dividing each frame into different numbers of optical timeslots, so that all optical timeslots have a same bandwidth granularity.

9 . The data processing method according to claim 1 , wherein
before the carrying the optical burst transport unit onto an optical timeslot of an optical burst channel, the data processing method comprises: for optical burst channels at different bit rates, dividing each frame into the same number of optical timeslots.

10 . A data processing method for an optical transport network, comprising:
obtaining an optical burst channel carried on a line; performing optical-electrical conversion on an optical burst transport unit on the optical burst channel and obtaining an optical burst transport unit; demapping the optical burst transport unit to obtain an optical channel data unit from a payload area of the optical burst transport unit; demapping the optical channel data unit to obtain an optical payload unit; and decapsulating the optical payload unit to obtain service data.

11 . The data processing method according to claim 10 , wherein the obtaining an optical burst channel carried in a line comprises:
performing demultiplexing on an optical burst multiplex section in the line and obtaining more than two optical burst channels; and the performing optical-electrical conversion on an optical burst transport unit in the optical burst channel comprises: performing optical-electrical conversion on optical burst transport units in the more than two optical burst channels.

12 . A data transmitting processing apparatus, comprising:
an encapsulating unit, configured to encapsulate service data into an optical payload unit; a first mapping unit, configured to map the optical payload unit to an optical channel data unit; a second mapping unit, configured to map the optical channel data unit to a payload area of an optical burst transport unit; an electrical-optical conversion module, configured to perform electrical-optical conversion on the optical burst transport unit to form an optical burst transport unit; an optical burst mapping module, configured to carry the optical burst transport unit onto an optical timeslot of an optical burst channel; and a transmitting module, configured to transmit the optical burst channel to a line.

13 . The data transmitting processing apparatus according to claim 12 , wherein
the second mapping unit is specifically configured to map the optical channel data unit, whose signal time length is less than or equal to a frame period of the optical burst transport unit, to the payload area of the optical burst transport unit.

14 . The apparatus according to claim 12 , wherein
the transmitting module further comprises: a multiplexing module, configured to perform optical burst timeslot multiplexing or optical burst add/drop multiplexing on the optical burst channel and optical burst channels mapped from other optical channel data units to form an optical burst multiplex section, wherein the optical burst timeslot multiplexing or the optical burst add/drop multiplexing is performed at the optical layer.

15 . The apparatus according to claim 12 , wherein
the transmitting module further comprises: a cross-connection module, configured to perform cross-connection on the optical burst channel and optical burst channels mapped from other optical channel data units, wherein the cross-connection is performed at the optical layer.

16 . The apparatus according to claim 12 , wherein
the data transmitting processing apparatus further comprises: a dividing unit, configured to: for optical burst channels at different bit rates, divide each frame into different numbers of optical timeslots, so that all optical timeslots have a same bandwidth granularity.

17 . The apparatus according to claim 12 , wherein
the data transmitting processing apparatus further comprises: a dividing unit, configured to: for optical burst channels at different bit rates, divide each frame into the same number of optical timeslots.

18 . A data receiving processing apparatus, comprising:
an obtaining unit, configured to obtain an optical burst channel carried on a line; an optical-electrical conversion module, configured to perform optical-electrical conversion on an optical burst transport unit on the optical burst channel to obtain an optical burst transport unit; a first demapping module, configured to demap the optical burst transport unit to obtain an optical channel data unit from a payload area of the optical burst transport unit; a second demapping module, configured to demap the optical channel data unit to obtain an optical payload unit; and a decapsulating unit, configured to decapsulate the optical payload unit to obtain s

Assignees

• Huawei Tech Co Ltd

Inventors

• Deng Ning
• Vissers Maarten P J
• Shi Xiaozhong

Classifications

• H04Q11/0071 Primary

  Provisions for the electrical-optical layer interface · CPC title

• H04J2203/0085

  Support of Ethernet · CPC title

• H04Q2011/0086

  Network resource allocation, dimensioning or optimisation · CPC title

• H04Q11/0066

  Provisions for optical burst or packet networks · CPC title

• H04J3/1658 Primary

  carrying packets or ATM cells; (H04J3/1664 takes precedence for payloads with different packet types) · CPC title