TWI670955B - High-speed switching network system with optical switches - Google Patents

Abstract

The invention relates to a high-speed switching network system with an optical switch and a configuration method thereof, which is used for a high-speed switching network of an internet data center. The invention adopts a hexagonal architecture optical switch as a switching core component in a two-dimensional space. Hex-type bee format deployment and expansion on the network topology, which can be quickly deployed and expanded to the all-optical high-speed switching network of the data center using the current 8*8 optical switch, and can be used in bandwidth requirements or backup requirements. When added, the 16*16 optical switch replaces the 8*8 optical switch to achieve the functions of extended bandwidth and backup requirements, and has the purposes and advantages of flexible fault tolerance, high frequency bandwidth, power saving, all-optical, and one-time investment in equipment.

Description

High-speed switching network system with optical switch

The present invention relates to a high-speed switching network system and a configuration method thereof, and more particularly to a high-speed switching network system configured with an optical switch and a configuration method thereof.

The invention patent No. I552536 discloses an optical data center network system and an optical switch, and the optical switch is composed of a commercially available Wavelength Selective Switch (WSS) to connect the optical data center network system. The three-layer architecture includes a plurality of first layer optical switches, a plurality of second layer optical switches, and a plurality of third layer optical switches. The plurality of first layer optical switches are interconnected by a ribbon fiber to form a pod; the plurality of second layer optical switches are interconnected by a ribbon optical fiber to form a macro group. a macro pod, and the second layer optical switch is connected to all first layer optical switches in a group; finally, the plurality of third layer optical switches are also connected to each other through a ribbon optical fiber. Also, each of the third layer optical switchers is connected to all of the second layer optical switches in a macro group. That is, this patent is directed to an optical data center network system that utilizes a three-layer pyramid architecture to implement a switched network.

US/01/0195258 A1 US invention patent application METHOD FOR COMPLEX COLORING BASED PARALLEL SCHEDULING FOR SWITCHING NETWORK proposes a method for large-scale high-speed switching network using complex shading parallel scheduling algorithm for traffic scheduling, the algorithm can be The best scheduling scheme is obtained without knowing the full service of the network system, so that the bandwidth utilization of the switching system is close to 100% throughput.

In view of the shortcomings of the aforementioned systems and methods, the industry continues to improve.

To achieve the foregoing objective, the present invention provides a high-speed switching network system having an optical switch, including: a plurality of the optical switches, each of the optical switches includes at least eight input/output ports, and six of the plurality of optical switches The six optical switches are respectively located at the vertices of the hexagonal structure, and the hexagonal structure is configured with an optical fiber to connect the six optical switches, and the six optical switches are: The optical switch is the first optical switch in the first configuration order; the second optical switch is disposed in a first direction adjacent to the apex of the first switch and connected to the first optical switch through the optical fiber; The third optical switch is disposed in the first direction adjacent to the apex of the hexagonal structure and connected to the second optical switch through the optical fiber; the fourth optical switch is disposed in the hexagon along the first direction Constructing a vertex adjacent to the third switch and connecting the third optical switch and the first optical switch located at a diagonal position of the hexagonal structure through the optical fiber; Optical switches, arranged along the first direction based The sixth optical switch is connected to the apex of the fourth switch and connected to the fourth optical switch and the second optical switch located at the hexagonal diagonal position through the optical fiber; the sixth optical switch is disposed along the first direction Remaining vertices of the hexagonal structure and connecting the fifth optical switch, the first optical switch, and the third optical switch located at a diagonal position of the hexagonal structure through the optical fiber; wherein the six optical switches are At least one of the optical switches is configured as a seventh optical switch, starting from the first optical switch configured first and based on the remaining five of the six optical switches, and continuing to be configured adjacent to each other in the first direction. A hexagonal structure.

The invention further provides a method for configuring a high-speed switching network system with an optical switch, comprising: configuring a first optical switch; configuring a second optical switch in a first direction, and connecting the second optical switch to the adjacent optical fiber through the optical fiber a first optical switch, wherein the second optical switch is located at an apex of the hexagonal structure formed on the first optical switch; the third optical switch is configured along the first direction, and the third optical switch is permeable The optical fiber is connected to the adjacent second optical switch, wherein the third optical switch is located at an apex of the hexagonal structure; a fourth optical switch is disposed along the first direction at an apex of the hexagonal structure, and the optical fiber is transmitted through the optical fiber Connecting the adjacent third optical switch and the first optical switch at the hexagonal diagonal position; configuring a fifth optical switch in the first direction adjacent to the apex of the fourth optical switch, and transmitting The optical fiber is connected to the fourth optical switch and the second optical switch located at the diagonal position of the hexagon; and the sixth optical switch is disposed along the first direction Hexagonal framework located between the first vertex and the optical switch of the fifth optical switch, and is connected to the fifth through the optical fiber An optical switch, the first optical switch, and the third optical switch at the hexagonal diagonal position; wherein a seventh optical switch starts with the first optical switch configured first and the second to the first Based on the six optical switches, another hexagonal structure disposed adjacent to the first direction is connected.

In the foregoing high-speed switching network system with an optical switch and its configuration method, the first direction is a clockwise direction.

In the foregoing high-speed switching network system with an optical switch and its configuration method, in the adjacent three hexagonal structures configured by the first optical switch as a starting point, the first optical switch transmits 120 through the optical fiber. The angles are respectively connected to three optical switches located adjacent to the adjacent three hexagonal structures and adjacent to the first optical switch.

In the foregoing high-speed switching network system with an optical switch and the method for configuring the same, the first optical switch connects the three vertices located at the apex of the adjacent three other hexagonal structures along the 120-degree angle of the optical fiber. Seven optical switches.

In the foregoing high-speed switching network system with an optical switch and a configuration method thereof, the plurality of optical switches are grouped into optical switch groups of two.

In the foregoing high-speed switching network system with an optical switch and its configuration method, in the optical switch group composed of the first switch and the second optical switch, the first switch and the second optical switch are simultaneously connected. The first TOR switch and the second TOR switch.

In the foregoing high-speed switching network system with an optical switch and a configuration method thereof, the plurality of optical switches are configured as the plurality of hexagonal structures In the sequence, the optical switch group configured first in the first configured hexagonal architecture is simultaneously connected to the first core switch and the second core switch by using optical fibers.

In the foregoing high-speed switching network system with an optical switch and a configuration method thereof, in the sequence in which the plurality of optical switches are configured as a plurality of hexagonal structures, in the last configured hexagonal architecture, the last configured is completed. The optical switch group is connected to the third core switch and the fourth core switch by using optical fibers at the same time.

The present invention is applied to a high-speed switching network of an Internet data center, and uses a hexagonal optical switch as a switching core component to perform hexagonal cell layout and expansion on a two-dimensional network topology. The design makes the overall network flexible and fault-tolerant. It can be quickly deployed and expanded into a data center all-optical high-speed switching network by using the current 8*8 optical switch (which can be expanded to 16*16 optical switch in the future). In order to achieve the purpose and advantages of flexible fault tolerance, high frequency width, power saving, all-opticalization and equipment one-time investment.

In the field of all-optical switching technology, the flexible fault-tolerant high-speed switching network design of the hexagonal optical switch is an innovative research topic in the high-speed core network of the Internet data center. The aforementioned high-speed switching network design enables the overall system to be achieved. All-optical, elastic fault-tolerant, high-frequency wide core exchange and other purposes and advantages, and further have the effect of green energy and carbon reduction.

In addition, the present invention is specifically designed for an 8*8 optical switch as a switching core (future scalable 16*16 optical switch), and uses a hexagonal two-dimensional deployment method to expand the entire all-optical switching network for all-optical The core switching network can better reinforce the inadequacies of two-dimensional layout and more two-dimensional clockwise The advantage of the elastic tolerance of the needle direction.

Furthermore, the present invention uses a hexagonal optical switch as a switching core component to perform hexagonal cell layout and expansion on a two-dimensional network topology. This design makes the overall network resilient and fault-tolerant. Mechanism, using the current 8*8 optical switch (expanded to 16*16 optical switch in the future), can quickly deploy and expand into a data center, all-optical high-speed switching network, and achieve elastic fault tolerance, high-bandwidth, power saving, The purpose and advantages of all-opticalization and one-time investment in equipment.

C1~C4‧‧‧ core switch

SW1~SW13‧‧‧ optical switch

T1, T2‧‧‧TOR switch

1 is a schematic diagram of a six-optical switch configured as a hexagonal structure; FIG. 2 is a schematic diagram of a switch group architecture of the present invention; and FIG. 3 is a 120-degree optical switch of a hexagonal structure of the present invention. The angle direction is respectively connected to the three optical switches located adjacent to the three hexagonal structures and adjacent to the optical switch; FIG. 4 is the optical switch of the hexagonal structure of the present invention, which are respectively adjacent to each other along the angle of 120 degrees. Schematic diagram of an optical switch with diagonal vertices of three hexagonal structures; FIG. 5 is a schematic diagram of a high-speed switching network system of the present invention connected to two TOR switches by an 8*8 optical switch; FIG. 6 is a view of the present invention A schematic diagram of a high speed switching network system connected to four core switches; and FIG. 7 is a schematic diagram of the high speed switching network system of the present invention replacing two 8*8 optical switches with two 16*16 optical switches.

Figure 1 is a schematic diagram of a six-optical switch configured as a hexagonal architecture. As shown in FIG. 1, the present invention is configured such that the first optical switch SW1 to the sixth optical switch SW6 are configured in a hexagonal structure, and each of the optical switches is an 8*8 optical switch and each has eight input/output ports. And respectively located at the apex of the hexagonal structure and interconnected by optical fibers, wherein the first optical switch SW1 is the first optical switch disposed in the hexagonal structure, and then, in the first direction and adjacent to the first A second optical switch SW2 is disposed on the other hexagonal apex of the switch SW1. The first switch SW1 and the second optical switch SW2 are connected to each other through the optical fiber, and the third optical switch SW3 is sequentially configured by the foregoing manner. The fourth optical switch SW4, the fifth optical switch SW5, and the sixth optical switch SW6 form a hexagonal structure.

Figure 2 is a schematic diagram of the switch group architecture of the present invention. As shown in FIG. 2, in the hexagonal architecture, each optical switch is used as a group of optical switch groups, and accordingly, three sets of optical switch groups are included in one hexagonal structure, and each switch group is respectively An optical switch SW1 and a second optical switch SW2, a third optical switch SW3, a fourth optical switch SW4, a fifth optical switch SW5, and a sixth optical switch SW6, and further, the optical switch SW (2n- of the present invention) 1) SW (2n) is the same switch group, n is the natural number sequentially increasing, and each optical switch group serves as load balancing and fault-tolerant backup for connecting the two TOR switches T1 and T2.

Figure 3 is a perspective view of the optical switch of the hexagonal structure of the present invention connected to adjacent three hexagonal structures at an angle of 120 degrees and adjacent to the optical contact. Schematic diagram of three optical switches that are replaced. As shown in FIG. 3, in the first configuration of the hexagonal structure, three of the input/output ports of the first optical switch SW1 are connected to the adjacent second optical switch SW2 and the sixth light at an angle of 120 degrees. The switch SW6 and the tenth optical switch SW10, wherein the first optical switch SW1 and the sixth optical switch SW6 belong to the first hexagonal structure, and the tenth optical switch SW10 belongs to the second hexagonal structure. In the present invention, when the second hexagonal structure is to be expanded and configured, the configuration position of the seventh optical switch SW7 needs to be selected first. In detail, the configuration position is along the light of the hexagonal structure of the first configuration. The switch number is incremented in the order of the direction, for example, starting from the first optical switch SW1 and extending in the clockwise direction through the sixth optical switch SW6. The restriction condition is that the first to the sixth are connected in the hexagonal structure of the first configuration. The optical switch SW1~SW6 has the remaining input/output ports to amplify the connection to another optical switch (for example, the seventh optical switch SW7), so that the first optical switch SW1 and the sixth optical switch SW6 are configured in the second configuration. The apex of the hexagonal structure, and after the seventh optical switch SW7 is connected to the sixth optical switch SW6 and configured at the vertices of the second hexagonal structure, continue to follow the clockwise direction and start with the optical switch SW1. The six optical switches SW6 to the seventh optical switch SW7, and then the eighth optical switch SW8, the ninth optical switch SW9, and the tenth optical switch SW10 are configured, and finally connected back to the first optical switch SW1. The second configuration of hexagonal architecture.

Furthermore, the configuration of the third hexagonal architecture is also extended by the configuration rules as described above. In detail, the optical switch SW1 is used as the starting point, and the first optical switch SW1 and the tenth optical switch SW10 are used as the third. Six The two vertices of the angular structure, and the eleventh optical switch SW11, the twelfth optical switch SW12, and the thirteenth optical switch SW13 are arranged along the clockwise direction, and finally connected back to the second optical switch SW2 and the first optical switch. SW1 to complete the configuration of the third hexagonal architecture. If the Nth hex architecture is to be expanded in accordance with the above rules, the extension of the present invention is connected to a plurality of hexagonal structures in a clockwise direction according to the increasing number order of the optical switches, and clockwise from the inside to the outside. Expand to form a high-speed switching network system.

Figure 4 is a schematic diagram of the optical switch of the hexagonal frame of the present invention connected to the optical switch at the apex of the adjacent three hexagonal structures at an angle of 120 degrees. As shown in FIG. 4, the other three input/output ports of the first optical switch SW1 are connected to the optical switch fourth optical switch SW4 located at the diagonal position of the adjacent three hexagonal structures along another 120-degree angle direction. The eighth optical switch SW8 and the twelfth optical switch SW12. That is, the optical switch that is the farthest from the first optical switch SW1 in the adjacent hexagonal structure, and the first optical switch SW1 is the optical optical fiber, the fourth optical switch SW4, the eighth optical switch SW8, and the tenth. The two optical switches SW12 are connected to each other.

Figure 5 is a schematic diagram of the high speed switching network system of the present invention connected to two TOR switches by an 8*8 optical switch. As shown in FIG. 5, the remaining two input/output ports of the first optical switch SW1 and the second optical switch SW2 are respectively connected to the first TOR switch T1 and the second TOR switch T2, and the first TOR switch T1 The two TOR switches T2 contain a group of two server groups for connecting to one of the light beams in the hexagonal architecture. Changing the unit, wherein each of the first TOR switch T1 and the second TOR switch T2 has two uplinks, and each of them is connected to the input of the first and second optical switches SW1 and SW2 of the corresponding optical switch group/ Output 埠, the first and second optical switch groups SW1 and SW2 serve as load balancing and fault tolerance backup for the TOR switches T1 and T2.

Figure 6 is a schematic diagram showing the connection of the high speed switching network system of the present invention to four core switches. As shown in FIG. 6, the present invention selects two optical switch groups from a plurality of hexagonal architectures to be connected to the core switch, and the first group of optical switch groups connected to the core switches selects the lowest ranked hexagonal architecture. The lowest-order optical switch group, for example, the optical switch group formed by the first optical switch SW1 and the second optical switch SW2 in the hexagonal architecture of the first configuration, and the remaining two input/output ports of the two switches are simultaneously Connected to core switches C1 and C2 for north-south traffic switching, where core switches C1 and C2 serve as load balancing and fault-tolerant backup for the entire network system.

Furthermore, the second group of optical switch groups connected to the core switch selects the lowest ranked optical switch group among the lowest ranked hexagonal architectures, for example, the eleventh optical switch SW11 in the hexagonal architecture of the third configuration is selected. The optical switch group formed by the twelfth optical switch SW12 is connected to the core switches C3 and C4 by the remaining two input/output ports of the two switches. Furthermore, if a third group of optical switch groups connected to the core switch is required, the lowest order optical switch group in the existing hexagonal architecture (the closest and farthest average switching architecture) is selected, and so on, in the selection of the Nth (N>3) optical switch group, the average center hex of the currently selected N-1 optical switch group The lowest ranked optical switch group in the architecture (average hexagonal architecture of multiple architectures) is the Nth priority. As shown in Figure 7, if the selected optical switch group has bandwidth increase or backup requirements, the two optical switches in the optical switch group can be replaced by 16*16 optical switches, and connected from each other. Increased to two connections for increased bandwidth and backup needs.

The invention adopts an optical switch to be configured as a flexible fault-tolerant high-speed switching network with a hexagonal structure, and is a high-speed switching network for an internet data center. The optical switch in the hexagonal architecture is configured as a switching core component in a two-dimensional space. On the network topology, a hexagonal cell is built and expanded to the square. This bee format design makes the overall network flexible and fault-tolerant, and utilizes the current standard and low price 8*8. The optical switch is rapidly deployed and expanded into a all-optical high-speed switching core network in a data center. In the future, when the video bandwidth requirement increases or the backup demand increases, the 16*16 optical switch is replaced at the important node to reach the extended frequency. The role of wide and redundant, to achieve the purpose and advantages of flexible fault tolerance, high frequency, power saving, all-optical, one-time investment in equipment.

Compared with other conventional technologies, the present invention has the following advantages: First, in the switching network of the Internet data center, most of the current traditional electric switches are used, whether in a three-layer switching architecture or a Fat-tree (Spine- In the Leaf) architecture, the core switch (Core Switch) or the Spine core switch are the most important switching cores in the entire switching network and the bottleneck. The present invention uses an 8*8 optical switch as the core switch, which has the advantage of ultra-high frequency bandwidth. And the equipment is invested once, and there is no need to upgrade this optical switching equipment in the future. For the current 8*8 optical switch, it is the switching core. Extend the entire all-optical switching network with a hexagonal two-dimensional layout. The high-speed switching network is built with an 8*8 optical switch as the core switch (the future scalable 16*16 optical switch), like the Core Switch of the three-layer switching architecture or the Spine core switch of the Spine-Leaf architecture.

Secondly, the present invention is configured with six optical switches in a hexagonal architecture, wherein six input/output ports of each optical switch are used as optical switch interconnections, and the network architecture is based on two-dimensional space and is based on six The angular bee mode is built and expanded. The remaining two input/output ports of each optical switch are connected to two TOR switches or two core switches for mutual fault tolerance and load balancing.

Furthermore, the high-speed core switching network of the present invention is all-optical, and the core switch is different from the traditional electric switching network. The bandwidth of the all-optical high-speed core switching network is no longer limited, and the core switch adopts an optical switch, and will also More energy saving and carbon reduction.

In addition, the present invention uses an optical switch for core switching in the switching network of the Internet data center, and performs a two-dimensional space hexagonal cell layout and expansion on the network topology. By using the extension rule of the hexagonal architecture, when the hexagonal architecture is extended, the optical switch numbers are sequentially incremented and clockwise connected into a hexagonal switching architecture, and the clockwise expansion is performed from the inside to the outside. This design enables The overall network is more flexible and fault-tolerant load-balanced under the framework of two-dimensional space.

The detailed description of the present invention is intended to be illustrative of a preferred embodiment of the invention, and is not intended to limit the scope of the invention. In the scope of the patent in this case.

Claims (16)

A high-speed switching network system having an optical switch includes: a plurality of the optical switches, each of the optical switches includes at least eight input/output ports, and six of the plurality of optical switches are configured as a hexagonal structure, wherein The six optical switches are respectively located at the vertices of the hexagonal structure, and the hexagonal structure is configured with an optical fiber to connect the six optical switches. The six optical switches are: the first optical switch, which is the first a second optical switch that is disposed along a first direction of the hexagonal structure adjacent to the apex of the first switch and connected to the first optical switch through the optical fiber; the third optical switch is along the optical switch The first direction is disposed in the hexagonal structure adjacent to the apex of the second switch and is connected to the adjacent second optical switch through the optical fiber; the fourth optical switch is disposed in the first direction adjacent to the hexagonal structure The apex of the three switches is connected to the third optical switch and the first optical switch located at a diagonal position of the hexagonal structure through the optical fiber; the fifth optical switch is The first direction is disposed on the apex of the hexagonal structure adjacent to the fourth switch, and is connected to the fourth optical switch and the second optical switch located at a diagonal position of the hexagonal structure through a fiber; the sixth optical switch, the edge The first direction is arranged in the hexagon Storing the remaining vertices and connecting the optical switch to the fifth optical switch, the first optical switch, and the third optical switch located at a diagonal position of the hexagonal structure; wherein the six optical switches of the multiple optical switches At least one of the other is a seventh optical switch, which is based on the first optical switch configured first and based on the remaining five of the six optical switches, and continues to be configured in the first direction to be adjacent to at least another A hexagonal structure. The high-speed switching network system with an optical switch as described in claim 1, wherein the first direction is a clockwise direction. The high-speed switching network system with an optical switch according to claim 1, wherein the first optical switch system is in the adjacent three hexagonal structures configured by the first optical switch as a starting point. The optical switches located in the adjacent three hexagonal structures adjacent to the first optical switch are respectively connected through the optical fibers at an angle of 120 degrees. The high-speed switching network system with an optical switch according to claim 3, wherein the first optical switch is connected to the apex of the adjacent three other hexagonal structures along the 120-degree angle of the optical fiber through the optical fiber. Three of the seventh optical switches. The high-speed switching network system with an optical switch as described in claim 1, wherein the plurality of optical switches are grouped into optical switch groups of two. The high-speed switching network system with an optical switch according to claim 5, wherein the first switch and the second optical switch are In the optical switch group, the first switch and the second optical switch are simultaneously connected to the first TOR switch and the second TOR switch. The high-speed switching network system with an optical switch according to claim 5, wherein in the order in which the plurality of optical switches are configured as the plurality of hexagonal structures, in the hexagonal architecture configured first The optical switch group that is configured first is connected to a first core switch and a second core switch by using the optical fiber. The high-speed switching network system with an optical switch according to claim 7, wherein in the sequence of the plurality of optical switches configured as the plurality of hexagonal structures, in the last configured hexagonal structure, The optical switch group that is finally configured is connected to a third core switch and a fourth core switch by using the optical fiber. A method for configuring a high-speed switching network system with an optical switch includes: configuring a first optical switch; configuring a second optical switch in a first direction, and connecting the second optical switch to the adjacent optical switch through the optical fiber The second optical switch is located at an apex of the hexagonal structure formed on the basis of the first optical switch; the third optical switch is disposed along the first direction, and the third optical switch is connected to the optical fiber through the optical fiber. The second optical switch, wherein the third optical switch is located at an apex of the hexagonal structure; and the fourth optical switch is disposed along the first direction, where the hexagonal structure is adjacent to a vertex of the third optical switch, and Connected to the fiber through Adjacent to the third optical switch and the first optical switch at the hexagonal diagonal position; configuring a fifth optical switch along the first direction, the hexagonal structure being adjacent to a vertex of the fourth optical switch, and Connecting the fourth optical switch and the second optical switch located at a diagonal position of the hexagonal structure through the optical fiber; configuring a sixth optical switch in the first direction, where the hexagonal structure is located in the first optical switch and the first optical switch An apex between the five optical switches, and connected to the fifth optical switch and the first optical switch through optical fibers, and the third optical switch located at a diagonal position of the hexagonal structure; wherein a seventh optical switch is The first optical switch configured first is a starting point and is based on the second to sixth optical switches, and is configured to be adjacent to at least another hexagonal structure in the first direction. The method for configuring a high-speed switching network system with an optical switch according to claim 9, wherein the first direction is a clockwise direction. The method for configuring a high-speed switching network system with an optical switch according to claim 9, wherein the first three hexagonal structures configured with the first optical switch as a starting point are the first The optical switch is respectively connected to three of the seventh optical switches located at adjacent vertices on the sidelines of the adjacent three other hexagonal structures through an optical fiber at an angle of 120 degrees. The method for configuring a high-speed switching network system with an optical switch according to claim 11, wherein the first optical switch transmits light The fiber connects three of the seventh optical switches located at the apex of the adjacent three hexagonal structures along the 120-degree angle. The method for configuring a high-speed switching network system with an optical switch according to claim 9, wherein the plurality of optical switches are each a group of optical switches. The method for configuring a high-speed switching network system with an optical switch according to claim 13 , wherein the first switch and the optical switch group formed by the first switch and the second optical switch The second optical switch is simultaneously connected to the first TOR switch and the second TOR switch. The method for configuring a high-speed switching network system with an optical switch according to claim 13, wherein in the order in which the plurality of optical switches are configured as a plurality of hexagonal structures, the hexagonal architecture of the first configuration is configured. The optical switch group that is configured first is connected to the first core switch and the second core switch by using optical fibers at the same time. The method for configuring a high-speed switching network system with an optical switch according to claim 15, wherein in the order in which the plurality of optical switches are configured as a plurality of hexagonal structures, the last of the finally configured hexagonal architecture The configured optical switch group is connected to the third core switch and the fourth core switch by using optical fibers at the same time.