Wireless and wired fusion data center interconnection structure, device and method

Abstract

The invention is suitable for the technical field of communication fusion, and particularly relates to a wireless and wired fusion data center interconnection structure, device and method. The cellular network clusters are connected through optical fiber links, each cellular network cluster is composed of a plurality of cellular units, and the cellular units in the same cellular network cluster are interconnected in a wireless link mode. By building a wireless free space optical communication link, direct interconnection between cellular units in the same cellular network cluster is realized, the routing hop count is reduced, the communication time delay is reduced, the flexibility and efficiency of network interconnection are greatly improved, and by combining the optical fiber, the communication efficiency is improved. The high stability and the anti-electromagnetic interference capability of the optical fiber can be fully utilized, a flexible redundant path can be provided for a wireless free space optical communication link, and the continuity and the reliability of communication can still be kept when a wired link is blocked.

Description

Technical Field

[0001] The present invention relates to the field of communication fusion technology, and in particular to a wireless and wired fusion data center interconnection structure, device and method. Background Art

[0002] In the existing technology, data centers are generally connected by tens of thousands of servers through optical fibers. Although this can provide high-speed transmission bandwidth and low latency, the layout of optical fiber lines is limited by space and physical environment, requiring precise planning and wiring, and has poor flexibility. When the network architecture needs to be frequently adjusted or expanded, it cannot adapt quickly, and there are certain limitations in transmission distance and signal attenuation.

[0003] Therefore, “how to combine wired technology and wireless technology” is the technical problem that the present invention needs to solve. Summary of the invention

[0004] The purpose of the present invention is to provide a wireless and wired fusion data center interconnection structure, device and method to solve the problem of "how to combine wired technology and wireless technology" raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A wireless and wired integrated data center interconnection structure, the structure comprising:

[0007] Three groups of cellular network clusters;

[0008] The cellular network clusters are connected via optical fiber links, and the cellular network clusters are composed of a plurality of cellular units, wherein the cellular units in the same cellular network cluster are interconnected via wireless links;

[0009] The honeycomb unit comprises:

[0010] Each of the honeycomb units consists of six edge nodes and one central node, wherein the six edge nodes are arranged as vertices of a regular hexagon and are connected to each other through wired optical fiber links, but are not connected to diagonal nodes, and each edge node is connected to the central node located at the center of the regular hexagon.

[0011] Furthermore, the wireless link mode is a wireless free space optical communication link.

[0012] Furthermore, the cellular units in the same cellular network cluster are not adjacent to each other.

[0013] Furthermore, in different cellular network clusters, adjacent cellular units are directly and cross-connected via wired optical fiber links.

[0014] Further, the device includes a connection module;

[0015] The connection module is used to traverse the nearest central node in the three groups of cellular network clusters and define it as the nearest center, continue to traverse the nearest edge node and define it as the nearest edge, and connect the nearest center and the nearest edge.

[0016] Furthermore, the device also includes:

[0017] A configuration module, used to configure an optimal route between the central node and the edge node;

[0018] A building module is used to build a wired optical fiber link or a wireless free space optical communication link between cellular units that are not adjacent and not in the same cellular network cluster.

[0019] Furthermore, the configuration module includes:

[0020] The calculation unit is used to embed the shortest hop path strategy into the cellular unit, and calculate the optimal route between the central node and the edge node based on the preset Dijkstra weighted shortest path algorithm.

[0021] Further, the following steps are included:

[0022] In the three groups of cellular network clusters, the nearest central node is traversed and defined as the nearest center, the nearest edge node is further traversed and defined as the nearest edge, and the nearest center and the nearest edge are connected.

[0023] Furthermore, the method further comprises:

[0024] Configuring an optimal route between the central node and the edge nodes;

[0025] Build wired fiber optic links or wireless free space optical communication links between non-adjacent cellular units that are not in the same cellular network cluster.

[0026] Furthermore, the method further comprises:

[0027] The shortest hop path strategy is embedded in the cellular unit, and the optimal route between the central node and the edge node is calculated based on the preset Dijkstra weighted shortest path algorithm.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. By selecting a regular hexagon as the unit structure and separating the nodes of each unit, it can ensure that no two cellular units share nodes. By adding geometric center nodes, the interconnection performance within and across cellular units is greatly enhanced. At the same time, cellular units can be dynamically added and deleted directly at the edge of the network, thereby achieving flexible expansion of the network and enabling data centers to adapt to load changes and scale growth.

[0030] 2. By building a wireless free-space optical communication link, direct interconnection between cellular units in the same cellular network cluster is achieved, the number of routing hops is reduced, and the communication delay is reduced, which greatly improves the flexibility and efficiency of network interconnection. It can also make full use of the high stability and anti-electromagnetic interference capabilities of optical fiber, and provide flexible redundant paths for wireless free-space optical communication links, ensuring the continuity and reliability of communication when the wired link is blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A network structure diagram of a single cellular unit;

[0032] Figure 2 This is a 4×4 cellular network cluster structure diagram;

[0033] Figure 3 The average end-to-end delay performance of a 4×4 cellular network cluster under different load levels;

[0034] Figure 4 It is the average end-to-end delay performance of 4×4 cellular network cluster network at different simulation times. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] In Example 1, Figure 1 A network structure diagram of a single cellular unit is shown.

[0037] exist Figure 1 In the figure, the seven circular patterns represent server nodes (hereinafter referred to as nodes), which are connected by wired optical fiber links, represented by solid lines in the figure. The wired optical fiber links use dense wavelength division multiplexing technology with a transmission rate of 10 Gbps.

[0038] In a single cellular unit, six server nodes are arranged along the six vertices of a regular hexagon, which are called edge nodes of the cellular unit. The remaining server node is located at the center of the regular hexagon, which is called the central node of the cellular unit. The distances from all edge nodes to the central node are equal and equal to the distance between two adjacent edge nodes.

[0039] Specifically, the central node is connected to all edge nodes via wired optical fiber links, and each edge node is connected to the following nodes via wired optical fiber links:

[0040] 1. Central node: Each edge node is connected to the central node located at the center of the regular hexagon.

[0041] 2. Adjacent edge nodes: Each edge node is connected to its two adjacent edge nodes, that is, through the edges of a regular hexagon.

[0042] 3. Non-adjacent but non-diagonal edge nodes: Each edge node is also connected to two non-adjacent edge nodes that are not located on its diagonal, which are separated from the selected edge node by one adjacent node.

[0043] 4. Not connected to diagonal nodes: Each edge node is not directly connected to the diagonal vertex nodes located at relative positions on the diameter of the regular hexagon.

[0044] A partially interconnected topology is formed by the above connection method, in which each edge node is connected to the central node, adjacent edge nodes and some non-adjacent edge nodes, but avoids direct connection with nodes corresponding to the diagonal line.

[0045] In Example 2, Figure 2 The network structure diagram of a 4×4 cellular network cluster is shown, where 4×4 means that there are 4 cellular units in each row, 4 rows in total, and 16 cellular units in total. These 16 cellular units together constitute a cellular network cluster network; the specific composition is as follows:

[0046] First, there are two pairs of edge nodes on each of the two adjacent edges between adjacent cellular units, for a total of four edge nodes. These two pairs of adjacent edge nodes are directly and cross-connected through wired optical fiber links; therefore, there are four wired optical fiber links interconnecting each pair of adjacent cellular units, and each cellular unit has six edges, which means it can be adjacent to a maximum of six cellular units, and each adjacent cellular unit is connected in the above manner.

[0047] Secondly, the cellular network clusters are divided into three different types of clusters, namely cluster A, cluster B and cluster C. Figure 2All cellular network clusters consisting of black solid circle nodes are called cluster A, all cellular network clusters consisting of vertical striped circle nodes are called cluster B, and all cellular network clusters consisting of horizontal striped circle nodes are called cluster C.

[0048] Wireless links are used between cells in each cluster. Figure 2 Indicated by the dotted line in the figure, the wireless link adopts wireless free space optical communication technology with a transmission rate of 10 Gbps.

[0049] Figure 2 The three groups of cellular network clusters are arranged in a circular pattern, and 16 cellular units form a 4×4 square grid structure. The cellular units in each group of clusters are not adjacent to each other, and each cellular unit is separated by cellular units from other clusters. It can be seen that in the entire interconnected structure, if three adjacent cellular units are randomly selected, these three cellular units must come from three groups of cellular network clusters; on this basis, if a cellular unit adjacent to any one of the three cellular units is selected, then the cellular unit must belong to the same cluster as one of the three cellular units.

[0050] like Figure 2 As shown in the dotted line, the connection between the cellular units in the same cluster is as follows:

[0051] 1. Central node: The central node of a cellular unit in the same cluster is connected to the central node of an adjacent cellular unit, and can be connected to the central nodes of adjacent cellular units in up to 6 directions.

[0052] 2. Edge nodes: In the same cluster, two adjacent honeycomb units extend three extension lines to each other. Each extension line is first connected to an edge node, called a "visible edge node". The extension line is connected to subsequent edge nodes, which are called "invisible edge nodes". These three extension lines are respectively connected to three pairs of visible edge nodes of two adjacent honeycomb units. Then, these three pairs of visible edge nodes are connected in pairs to complete the connection of edge nodes between adjacent honeycomb units in the same cluster.

[0053] The three groups of cellular network clusters are interconnected through wired optical fiber links between adjacent cellular units in the above grid, ultimately achieving the connection of the entire 4×4 cellular network cluster network.

[0054] In embodiment 3, the wireless and wired converged data center interconnection device 1 includes:

[0055] The connection module 11 is used to traverse the nearest central node in the three groups of cellular network clusters and define it as the nearest center, continue to traverse the nearest edge node and define it as the nearest edge, and connect the nearest center and the nearest edge;

[0056] A configuration module 12, configured to configure an optimal route between the central node and the edge nodes;

[0057] The building module 13 is used to build a wired optical fiber link or a wireless free space optical communication link between cellular units that are not adjacent and not in the same cellular network cluster.

[0058] The configuration module 12 includes:

[0059] The calculation unit 121 is used to embed the shortest hop path strategy into the cellular unit, and calculate the optimal route between the central node and the edge node based on the preset Dijkstra weighted shortest path algorithm.

[0060] The strategy for establishing the optimal route is as follows: in the entire cellular grid, all nodes follow the shortest hop path principle when performing routing communications, and use the Dijkstra weighted shortest path algorithm to find the optimal route between node pairs; nodes within a cellular unit, as well as cellular units in different clusters but adjacent to each other, are interconnected through wired optical fiber links; and cellular units in the same cluster are interconnected using wireless free-space optical communication links. For cellular units in different clusters and not adjacent to each other, a hybrid connection strategy of wired optical fiber links and wireless free-space optical communication links is adopted.

[0061] There are two possible transmission paths for data packets: one is that the data packet is first transmitted through a wireless free-space optical communication link to the same cluster cellular unit closest to the receiving cellular unit, and then reaches the receiving cellular unit through an adjacent wired optical fiber link; the other is that the data packet is first transmitted through an adjacent wired optical fiber link to the cellular unit that is closest to the sending end and in the same cluster as the receiving end, and then the data packet is sent to the receiving cellular unit through a wireless free-space optical communication link between cellular units in the same cluster.

[0062] The selection of these two transmission paths also follows the shortest hop path principle, and uses the Dijkstra weighted shortest path algorithm to find the optimal route between node pairs.

[0063] In Example 4, the 4×4 cellular network cluster can be further expanded to 8×8, 16×16 and other scales, and is not even limited to square grids, but can also be any polygonal grid. It is precisely because of this scalability that it not only compensates for the latency problem caused by fixed fiber optic links, but also provides more flexible routing options, reduces the number of routing hops, and reduces the blocking rate of communication links.

[0064] In actual use, a simulation method is generally used to test a 4×4 cellular network cluster.

[0065] During the simulation, the OMNeT++ simulation system and INET framework were used to test the performance of the architecture under data center traffic conditions. The experiment simulated the network performance of the test under different traffic load levels, and the evaluation indicator was the average end-to-end delay of the entire network; the rates of the wired optical fiber link and the wireless free space optical communication link were set to 10Gbps, and the data packet arrival process of each node followed the Poisson distribution. By adjusting the packet size and the average sending interval, the load level was normalized, and the load level ranged from 0.1 to 1; Table 1 below shows the simulation data of the normalized load level, and Table 2 below shows the average end-to-end delay performance simulation data under different load levels.

[0066]

[0067] Table 1

[0068]

[0069] Table 2

[0070] As shown in Table 2 and Figure 3 As shown in the figure, when the load level is 0.1, the average end-to-end delay is as low as 7.77 milliseconds. As the load level gradually increases, the average end-to-end delay also increases accordingly. When the load level is 1, the average end-to-end delay reaches a maximum value of 71.03 milliseconds. Although the average end-to-end delay increases with the increase in load level, it shows a stable linear growth trend as a whole, and there is no explosive growth caused by the increase in load level.

[0071] In summary, the network architecture has good stability. In addition, the load level was increased tenfold compared to 0.1 at the end of the simulation, mainly to simulate the network performance under large traffic; therefore, under high load conditions, the average end-to-end delay will increase significantly compared to low load conditions, but in actual application scenarios, the average end-to-end delay may be lower.

[0072] like Figure 4 As shown, the simulation verifies Figure 2 The average end-to-end delay performance of the tested network at different simulation times is shown. Figure 4 It can be observed that under all load levels, the simulation time is 3600 seconds. Regardless of the load level, the average end-to-end delay tends to stabilize within 500 milliseconds after the start of the simulation, and then the delay change curve presents a straight line; this shows that the network architecture has good reliability and stability.

[0073] Through simulation experiments, it is concluded that the cellular grid network interconnection architecture composed of multiple cellular units proposed in the present invention can effectively solve the service transmission delay problem caused by the existing data center when the servers are interconnected through multi-hop routing, and provide more flexible routing options, reduce the number of routing hops, and reduce the blocking rate of communication links. In addition, the architecture has good scalability and can be expanded by adding cellular units at the edge of the network.

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wireless and wired integrated data center interconnection structure, characterized in that: The structure includes: three groups of cellular network clusters; The cellular network clusters are connected via optical fiber links, and the cellular network clusters are composed of a plurality of cellular units, wherein the cellular units in the same cellular network cluster are interconnected via wireless links; The honeycomb unit comprises: Each of the honeycomb units consists of six edge nodes and one central node, wherein the six edge nodes are arranged as vertices of a regular hexagon and are connected to each other through wired optical fiber links, but are not connected to diagonal nodes, and each edge node is connected to the central node located at the center of the regular hexagon.

2. The wireless and wired integrated data center interconnection structure according to claim 1, characterized in that: The wireless link mode is a wireless free space optical communication link.

3. The wireless and wired integrated data center interconnection structure according to claim 1, characterized in that: The cellular units in the same cellular network cluster are not adjacent to each other.

4. The wireless and wired integrated data center interconnection structure according to claim 1, characterized in that: In different cellular network clusters, adjacent cellular units are directly and cross-connected via wired optical fiber links.

5. A wireless and wired fusion data center interconnection device, characterized in that: The device comprises: a structure as claimed in any one of claims 1 to 4, and a connecting module; The connection module is used to traverse the nearest central node in the three groups of cellular network clusters and define it as the nearest center, continue to traverse the nearest edge node and define it as the nearest edge, and connect the nearest center and the nearest edge.

6. The wireless and wired converged data center interconnection device according to claim 5, characterized in that: The device also includes: A configuration module, used to configure an optimal route between the central node and the edge node; A building module is used to build a wired optical fiber link or a wireless free space optical communication link between cellular units that are not adjacent and not in the same cellular network cluster.

7. The wireless and wired converged data center interconnection device according to claim 6, characterized in that: The configuration module includes: The calculation unit is used to embed the shortest hop path strategy into the cellular unit, and calculate the optimal route between the central node and the edge node based on the preset Dijkstra weighted shortest path algorithm.

8. A wireless and wired fusion data center interconnection method, characterized in that: The method is used for the structure according to any one of claims 1 to 4, comprising the following steps: In the three groups of cellular network clusters, the nearest central node is traversed and defined as the nearest center, the nearest edge node is further traversed and defined as the nearest edge, and the nearest center and the nearest edge are connected.

9. The wireless and wired converged data center interconnection method according to claim 8, characterized in that: The method further comprises: Configuring an optimal route between the central node and the edge nodes; Build wired fiber optic links or wireless free space optical communication links between non-adjacent cellular units that are not in the same cellular network cluster.

10. The wireless and wired converged data center interconnection method according to claim 8, characterized in that: The method further comprises: The shortest hop path strategy is embedded in the cellular unit, and the optimal route between the central node and the edge node is calculated based on the preset Dijkstra weighted shortest path algorithm.

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