Scalable ultra dense hypergraph network for data centers

• US 9,960,878 B2
• Filed: 11/07/2016
• Issued: 05/01/2018
• Est. Priority Date: 10/01/2013
• Status: Active Grant

• Current Assignee: Indian Institute of Technology Bombay
• Original Assignee: Indian Institute of Technology Bombay
• Inventors: Gumaste, Ashwin, Kushwaha, Aniruddha
• Primary Examiner(s): Vanderpuye, Ken N
• Assistant Examiner(s): SANCHEZ, DIBSON J
• Application Number:
  US15/344,861
• Publication Number:
  US 20170054524A1
• Time in Patent Office: 540 Days
• Field of Search: 398 58- 59, 398 79, 398 82- 88
• CPC Class Codes: H04B 10/032 using working and protection systems H04J14/0287 takes precedence
• CPC Class Codes: H04B 10/275 Ring-type networks
• CPC Class Codes: H04J 14/0212 using optical switches or wavelength selective switches [WSS]
• CPC Class Codes: H04J 14/0283 WDM ring architectures
• CPC Class Codes: H04Q 11/0005 Switch and router aspects
• CPC Class Codes: H04Q 11/0062 Network aspects
• CPC Class Codes: H04Q 2011/0016 using wavelength multiplexing or demultiplexing
• CPC Class Codes: H04Q 2011/0039 Electrical control
• CPC Class Codes: H04Q 2011/0041 Optical control
• CPC Class Codes: H04Q 2011/0052 Interconnection of switches
• CPC Class Codes: H04Q 2011/0081 Fault tolerance; Redundancy; Recovery; Reconfigurability
• CPC Class Codes: H04Q 2011/0092 Ring

Abstract

A network capable of being used in a datacenter is described. The network can comprise a set of optical fiber rings, wherein each optical fiber ring carries data traffic on multiple wavelengths, and wherein each optical fiber ring is partitioned into multiple sectors. In some embodiments, each sector in the multiple sectors can comprise: (1) only one add-wavelength-selective-switch (add-WSS) communicatively coupled to only one optical fiber ring in the set of optical fiber rings, wherein the only one add-WSS is used for sending all data traffic that originates from the sector and is destined to other sectors; (2) an add-electro-optical-switch (add-EOS) communicatively coupled to the add-WSS; (3) a set of drop-wavelength-selective-switches (drop-WSSs) communicatively coupled to the set of optical fiber rings, wherein the set of drop-WSSs are used for receiving data traffic from other sectors; and (4) a drop-electro-optical-switch (drop-EOS) communicatively coupled to a drop-WSS in the set of drop-WSSs.

Claims

1. A network, comprising:

a set of optical fiber rings, wherein each optical fiber ring carries data traffic on multiple wavelengths, and wherein each optical fiber ring is partitioned into multiple sectors; and

each sector in the multiple sectors comprising;

an add-wavelength-selective-switch (add-WSS) communicatively coupled via a passive optical coupler to an optical fiber ring in the set of optical fiber rings, wherein the add-WSS is used for sending all data traffic that originates from the sector and is destined to other sectors, wherein an optical signal in the optical fiber ring is combined with an optical signal from the add-WSS and passed along the optical fiber ring to other sectors;

an add-electro-optical-switch (add-EOS) communicatively coupled to the add-WSS;

a set of drop-wavelength-selective-switches (drop-WSSs) communicatively coupled via a set of passive optical couplers to the set of optical fiber rings, wherein the set of drop-WSSs are used for receiving data traffic from other sectors, wherein each passive optical coupler in the set of passive optical couplers splits an optical signal in an optical fiber ring into two parts, wherein a first part is passed along the optical fiber ring to other sectors, and wherein a second part is provided to the drop-WSS;

a drop-electro-optical-switch (drop-EOS) communicatively coupled to a drop-WSS in the set of drop-WSSs;

a set of N aggregation switches, wherein each aggregation switch in the set of aggregation switches is communicatively coupled with the add-EOS and the drop-EOS;

a set of HM/N edge switches, wherein each edge switch in the set of edge switches is communicatively coupled with each aggregation switch in the set of aggregation switches;

a set of servers wherein each server in the set of servers is communicatively coupled to at least one edge switch In the set of edge switches; and

wherein H wavelengths are allocated to each sector, wherein M is the muxponding gain of the network, and wherein M is either (a) a number of servers per wavelength in a backplane to achieve full bisection bandwidth, or (b) an overprovisioning factor enabling capacity for intra-sector traffic resulting in less than full bisection bandwidth.

2. The network of claim 1, wherein the set of optical fiber rings comprises clockwise optical fiber rings and counter-clockwise optical fiber rings, wherein the set of optical fiber rings are configured to perform protection switching upon detecting a failure.

3. A datacenter, comprising:

a set of servers; and

a datacenter backplane communicatively coupled to the set of servers, wherein the datacenter backplane comprises;

a set of optical fiber rings, wherein each optical fiber ring carries data traffic on multiple wavelengths, and wherein each optical fiber ring is partitioned into multiple sectors; and

each sector in the multiple sectors comprising;

an add-wavelength-selective-switch (add-WSS) communicatively coupled via a passive optical coupler to an optical fiber ring in the set of optical fiber rings, wherein the add-WSS is used for sending all data traffic that originates from the sector and is destined to other sectors, wherein an optical signal in the optical fiber ring is combined with an optical signal from the add-WSS and passed along the optical fiber ring to other sectors;

an add-electro-optical-switch (add-EOS) communicatively coupled to the add-WSS;

a set of drop-wavelength-selective-switches (drop-WSSs) communicatively coupled via a set of passive optical couplers to the set of optical fiber rings, wherein the set of drop-WSSs are used for receiving data traffic from other sectors, wherein each passive optical coupler in the set of passive optical couplers splits an optical signal in an optical fiber ring into two parts, wherein a first part is passed along the optical fiber ring to other sectors, and wherein a second part is provided to the drop-WSS;

a drop-electro-optical-switch (drop-EOS) communicatively coupled to a drop-WSS in the set of drop-WSSs;

a set of N aggregation switches, wherein each aggregation switch in the set of aggregation switches is communicatively coupled with the add-EOS and the drop-EOS;

a set of HM/N edge switches, wherein each edge switch in the set of edge switches is communicatively coupled with each aggregation switch in the set of aggregation switches;

a set of servers, wherein each server in the set of servers is communicatively coupled to at least one edge switch in the set of edge switches; and

wherein H wavelengths are allocated to each sector, wherein M is the muxponding gain of the datacenter, and wherein M is either (a) a number of servers per wavelength in a backplane to achieve full bisection bandwidth, or (b) an overprovisioning factor enabling capacity for intra-sector traffic resulting in less than full bisection bandwidth.

4. The datacenter of claim 3, wherein the set of optical fiber rings comprises clockwise optical fiber rings and counter-clockwise optical fiber rings, wherein the set of optical fiber rings are configured to perform protection switching upon detecting a failure.

5. A datacenter, comprising:

a set of optical fiber rings, wherein each optical fiber ring carries data traffic on multiple wavelengths, and wherein each optical fiber ring is partitioned into a set of sectors; and

a set of racks, wherein each rack corresponds to a sector, wherein each rack includes a set of servers that is stacked vertically in the rack, and wherein each rack includes a set of top-of-the-rack (ToR) switches that is communicatively coupled to each server in the rack, wherein the set of ToR switches comprises;

an add-wavelength-selective-switch (add-WSS) communicatively coupled via a passive optical coupler to an optical fiber ring in the set of optical fiber rings, wherein the add-WSS is used for sending all data traffic that originates from the sector and is destined to other sectors, wherein an optical signal in the optical fiber ring is combined with an optical signal from the add-WSS and passed along the optical fiber ring to other sectors;

an add-electro-optical-switch (add-EOS) communicatively coupled to the add-WSS;

a set of drop-wavelength-selective-switches (drop-WSSs) communicatively coupled via a set of passive optical couplers to the set of optical fiber rings, wherein the set of drop-WSSs are used for receiving data traffic from other sectors, wherein each passive optical coupler in the set of passive optical couplers splits an optical signal in an optical fiber ring into two parts, wherein a first part is passed along the optical fiber ring to other sectors, and wherein a second part is provided to the drop-WSS; and

a drop-electro-optical-switch (drop-EOS) communicatively coupled to a drop-WSS in the set of drop-WSSs;

a set of N aggregation switches, wherein each aggregation switch in the set of aggregation switches Is communicatively coupled with the add-EOS and the drop-EOS;

a set of HM/N edge switches, wherein each edge switch in the set of edge switches is communicatively coupled with each aggregation wherein each server in the set of servers is communicatively coupled to at least one edge switch in the set of edge switches; and

wherein H wavelengths are allocated to each sector, wherein M is the muxponding gain of the datacenter, and wherein M Is either (a) a number of servers per wavelength in a backplane to achieve full bisection bandwidth, or (b) an overprovisioning factor enabling capacity for intra-sector traffic resulting in less than full bisection bandwidth.

6. The datacenter of claim 5, wherein the set of optical fiber rings comprises clockwise optical fiber rings and counter-clockwise optical fiber rings, wherein the set of optical fiber rings are configured to perform protection switching upon detecting a failure.