Reconfigurable and variable-rate shared multi-transponder architecture for flexible ethernet-based optical networks

Patent metadata

Field	Value
Publication number	US-9609400-B2
Application number	US-201414465122-A
Country	US
Kind code	B2
Filing date	Aug 21, 2014
Priority date	Aug 22, 2013
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

Systems and methods for data transport, including receiving one or more signals into a reconfigurable and flexible rate shared rate multi-transponder network architecture, wherein the network architecture includes one or more transponders with multiple line side interfaces and one or more client side interfaces. The transponders are configured to map one or more signals to multiple parallel Virtual Ethernet Links, remove idle characters from the one or more signals, buffer one or more blocks of characters using an intermediate block buffer, activate and deactivate one or more portions of input/output electrical lanes of an Ethernet module, multiplex and demultiplex the one or more signals to and from the input/output electrical lanes to enable sharing of a single optical transceiver by multiple independent signals, and insert blocks of idle characters to enable transmission over a lower rate transmission pipe.

First claim

What is claimed is:

1. A method for data transport, comprising:
receiving one or more signals into a reconfigurable and flexible rate shared rate multi-transponder network architecture, wherein the network architecture includes one or more transponders with multiple line side interfaces and one or more client side interfaces, the one or more transponders configured to:
map one or more signals to multiple parallel Virtual Ethernet Links;
remove idle characters from the one or more signals;
buffer one or more blocks of characters using an intermediate block buffer;
activate and deactivate one or more portions of input/output electrical lanes of an Ethernet module processing one or more incoming Ethernet frame streams arriving at a transponder from client side interfaces and destined for the same output port i with maximum rate L i at a line side and split into up to k independent streams, and each is carried over a transmission pipe with a rate R ij , where Σ j=1 k R i,j ≦L i ,
multiplex and demultiplex the one or more signals to and from the input/output electrical lanes to enable sharing of a single optical transceiver by multiple independent signals, the multiple independent signals being multiplexed and demultiplexed in parallel according to actual traffic demands for each of the multiple independent signals; and
insert blocks of idle characters into the one or more signals to enable transmission over a lower rate transmission pipe.

2. The method as recited in claim 1 , wherein the one or more signals are single client Ethernet signals.

3. The method as recited in claim 1 , wherein only active lanes of the input/output electrical lanes are enabled.

4. The method as recited in claim 1 , wherein the one or more transponders are further configured to map Ethernet frames arriving from the multiple line side interfaces to a configurable number of Ethernet signals of adjustable rate towards the one or more client side interfaces.

5. The method as recited in claim 1 , wherein the one or more transponders is further configured to map Ethernet frames arriving from each of the one or more client side interfaces to a configurable number of Ethernet signals of adjustable rate towards the multiple line side interfaces.

6. The method as recited in claim 1 , wherein parameters of the one or more transponders are controlled by a remote controller.

7. The method as recited in claim 1 , wherein the one or more transponders are configured to insert idle characters into an Ethernet signal at the Physical Coding Sublayer to enable data transmission by higher rate sublayers.

8. A transmitter, comprising:
one or more transponders in a reconfigurable and flexible rate shared rate multi-transponder network architecture, wherein the one or more transponders include multiple line side interfaces and one or more client side interfaces, the one or more transponders further comprising:
one or more mappers configured to map one or more signals arriving from each of the one or more client side interfaces to a configurable number of adjustable rate Ethernet signals towards the multiple line side interfaces, wherein a single optical transceiver module is shared toward the multiple line side interfaces by multiple Ethernet signals in parallel, the multiple Ethernet signals each including traffic from a different client data stream where incoming Ethernet fame streams arrive at a transponder from client side interfaces and are destined for the same output port i with maximum rate L i at a line side and split into up to k independent streams, and each is carried over a transmission pipe with a rate R ij , where Σ j=1 k R i,j ≦L i ;
one or more bit-serial interfaces to receive input, and one or more parallel serial interfaces to send output to one or more electrical lanes;
an idle character removal module configured to remove existing idle characters from the Ethernet signals, and to send only useful blocks to active lanes in the one or more electrical lanes, wherein the useful blocks are blocks with no idle characters;
a buffer configured to distribute blocks of data in a round robin fashion, the buffer including an idle block insertion module configured to insert idle blocks when there are no blocks waiting in the buffer; and
one or more scramblers or encoders configured to scramble or encode the one or more signals before transmitting.

9. The transmitter as recited in claim 8 , wherein the one or more mappers are Virtual Ethernet Link mappers.

10. The transmitter as recited in claim 8 , wherein the one or more signals are single client Ethernet signals.

11. The transmitter as recited in claim 8 , wherein only active lanes of the one or more electrical lanes are enabled.

12. The transmitter as recited in claim 8 , wherein the one or more transponders are further configured to map Ethernet frames arriving from each of the one or more client side interfaces to a configurable number of Ethernet signals of adjustable rate towards the multiple line side interfaces.

13. The transmitter as recited in claim 8 , wherein parameters of the one or more transponders are controlled by a remote controller.

14. A receiver, comprising:
one or more transponders in a reconfigurable and flexible rate shared rate multi-transponder network architecture, wherein the one or more transponders includes multiple line side interfaces and one or more client side interfaces, the one or more transponders further comprising:
a receiving module configured to receive one or more signals using active lanes from one or more electrical lanes;
one or more demultiplexers configured to demultiplex the one or more signals, the one or more signals being multiplexed and demultiplexed in parallel according to actual traffic demands for each of the one of more signals;
one or more descramblers or decoders configured to descramble or decode the one or more signals; and
a buffer configured to receive descrambled or decoded signals, the buffer including a character insertion module configured to insert characters between successive Ethernet frames to maintain a transport rate and wherein one or more incoming Ethernet frame streams arrive at a transponder from client side interfaces and destined for the same output port i maximum rate L i at a line side and split into up to k independent streams, and each is carried over a transmission pipe with a rate R ij , where Σ j=1 k R i,j ≦L i .

15. The receiver as recited in claim 14 , wherein the one or more signals are single client Ethernet signals.

16. The receiver as recited in claim 14 , wherein the one or more transponders is further configured to map Ethernet frames arriving from each of the one or more client side interfaces to a configurable number of Ethernet signals of adjustable rate towards the multiple line side interfaces.

17. The receiver as recited in claim 14 , wherein parameters of the one or more transponders are controlled by a remote controller.

Assignees

• Nec Lab America Inc
• Nec Corp

Inventors

• Kanonakis Konstantinos
• Hu Junqiang
• Patel Ankitkumar
• Ji Philip
• Wang Ting

Classifications

• H04Q11/00 Primary

  Selecting arrangements for multiplex systems (multiplex systems H04J) · CPC title

• H04Q2213/13292

  Time division multiplexing, TDM · CPC title

• Y02B60/31

  Cross-Sectional Technologies · mapped topic

• H04Q2213/13103

  Memory · CPC title

• H04Q2213/13389

  LAN, internet · CPC title