Optical transmission system and transmission method, optical switching apparatus, and control method

Patent metadata

Field	Value
Publication number	US-2017034606-A1
Application number	US-201615293989-A
Country	US
Kind code	A1
Filing date	Oct 14, 2016
Priority date	Apr 16, 2014
Publication date	Feb 2, 2017
Grant date	—

Abstract

An optical transmission system and transmission method, an optical switching apparatus, and a control method are provided. Any data transmission apparatus included in an optical transmission system is configured to: transmit an optical label signal and a continuous data signal including an idle sequence and a data packet, and transmit the transmitted optical label signal to an optical switching apparatus, so that the optical switching apparatus builds, according to the optical label signal, a switching and transmission path for transmitting the continuous data signal transmitted by the any data transmission apparatus. This ensures that a data transmission apparatus transmits a continuous data signal, and also ensures that each optical receiving system can receive the continuous data signal. Therefore, no preamble needs to be added before a data packet carried in a to-be-processed data signal, thereby avoiding a resource waste and saving bandwidth resources.

First claim

What is claimed is:

1 . An optical transmission system, comprising: at least two data transmission apparatuses, wherein
any one of the data transmission apparatuses is configured to: transmit an optical label signal and a continuous data signal comprising an idle sequence and a data packet, and transmit the transmitted optical label signal to an optical switching apparatus, so that the optical switching apparatus builds, according to the optical label signal, a switching and transmission path for transmitting the continuous data signal transmitted by the any one of the data transmission apparatuses, wherein any optical label carried in the optical label signal corresponds to one data packet in the data signal, and switching and transmission paths corresponding to data signals transmitted by the any two different data transmission apparatuses have different output ports.

2 . The optical transmission system according to claim 1 , wherein any one of the data transmission apparatuses comprises an optical label transmission module, a data packet transmission module, and an idle sequence transmission module, wherein
the optical label transmission module is configured to transmit an optical label; the data packet transmission module is configured to transmit a data packet; and the idle sequence transmission module is configured to transmit an idle sequence between any optical label and any data packet that are adjacent.

3 . The optical transmission system according to claim 1 , wherein the optical label transmission module is further configured to:
generate an optical label, wherein any optical label comprises a preset switching destination output port address, a data length, and an optical label identifier.

4 . An optical switching apparatus, comprising: a management and control module, and an optical switch matrix, wherein
the management and control module is configured to: receive an optical label signal transmitted by an optical transmission system, and transmit, to the optical switch matrix, a control signal generated according to the optical label signal; and the optical switch matrix is configured to: receive a continuous data signal transmitted by the optical transmission system and the control signal; adjust, according to the control signal, an optical switch unit on a link between each input port for data signal input and a corresponding output port for data signal output, to build a switching and transmission path for transmitting the continuous data signal; and input the any data signal to an optical receiving system through the switching and transmission path, wherein any two different switching and transmission paths have different input ports and output ports.

5 . The optical switching apparatus according to claim 4 , wherein each optical label carried in the optical label signal received by the management and control module comprises a preset switching destination output port address, a data length, and an optical label identifier.

6 . The optical switching apparatus according to claim 4 , wherein the management and control module is specifically configured to:
determine, according to a preset switching destination output port address comprised in a corresponding optical label, an actual switching destination output port address corresponding to each data packet carried in a continuous data signal; allocate, for each idle sequence, an output port address corresponding to an idle output port, and use the output port address as an actual switching destination output port address corresponding to the idle sequence; and perform the following operations separately with respect to any data packet and any idle sequence: generating, according to an input port address and an actual switching destination output port address, a control signal for controlling a switch unit on a link between an input port corresponding to the input port address and an output port corresponding to the actual switching destination output port address; and transmitting the generated control signal to the optical switch matrix.

7 . The optical switching apparatus according to claim 6 , wherein the management and control module is further configured to:
calculate, with respect to any optical label in the received optical label signal and according to a data packet length comprised in the any optical label, a time required for transmitting a corresponding data packet; and determine, according to the time, a validity time of a control signal for controlling a switching and transmission path for the data packet corresponding to the optical label.

8 . The optical switching apparatus according to claim 4 , wherein the optical switch matrix is specifically configured to:
perform the following operations separately with respect to a control signal corresponding to any data signal: controlling a switch unit on a link between an input port and an actual switching destination output port that are corresponding to the data signal, and connecting the input port to the actual switching destination output port to build a switching and transmission path for transmitting the any data signal; and inputting the any data signal to the optical receiving system through the switching and transmission path.

9 . The optical switching apparatus according to claim 4 , wherein the management and control module is specifically configured to:
perform the following operations separately with respect to a data packet corresponding to any optical label: determining whether the data packet meets a preset condition; and if yes, using, as an actual switching destination output port address, a preset switching destination output port address comprised in the optical label corresponding to the data packet, and generating a control signal according to the actual switching destination output port address; otherwise, determining an idle switching output port, using any switching output port in the idle switching output port as an actual switching destination output port address, and generating a control signal according to the actual switching destination output port address.

10 . The optical switching apparatus according to claim 9 , wherein the determining, by the management and control module, whether the any data packet meets a preset condition is specifically:
determining whether the optical label corresponding to the data packet is correct and/or whether the corresponding preset switching destination output port address is occupied.

11 . The optical switching apparatus according to claim 9 , wherein the management and control module is specifically configured to:
use, with respect to an idle sequence, the any switching output port in the determined idle switching output port as an actual switching destination output port address of the idle sequence, and generate a control signal according to the actual switching destination output port address.

12 . The optical switching apparatus according to claim 9 , wherein the management and control module is specifically configured to:
if any two different data packets arrive at the optical switch matrix simultaneously, and preset switching destination output port addresses corresponding to the two data packets respectively are the same and unoccupied, use a preset switching destination output port address corresponding to one data packet as a first actual switching destination output port address of the data packet and use a determined idle switching output port address as a second actual switching destination output port address of the other data packet; and generate a control signal according to the first actual switching destination output po

Assignees

• Huawei Tech Co Ltd

Inventors

• Ma Huixiao
• Yang Xiaoling
• Li Shuaibing

Classifications

• H04Q2011/005

  Arbitration and scheduling · CPC title

• H04Q11/0066 Primary

  Provisions for optical burst or packet networks · CPC title

• H04Q11/0005

  Switch and router aspects · CPC title

• H04Q2011/0039

  Electrical control · CPC title

• H04L45/50

  using label swapping, e.g. multi-protocol label switch [MPLS] · CPC title