A Routing Method for Spatial Information Network Based on mpls
A space information network and routing technology, applied in data exchange networks, digital transmission systems, electrical components, etc., can solve the problems of satellite link network extension, difficulty in integration and intercommunication, etc.
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Embodiment 1
[0060] This embodiment aims at the problem of satellite link networking time extension in space information network, IP (Internet Protocol) technology and ATM (Asynchronous Transfer Mode) technology system coexisting on the star but difficult to integrate and intercommunicate, on the basis of satellite MPLS networking , proposed a spatial information network routing method based on MPLS, which can realize the integration of two different technical systems; and then proposed a path selection algorithm based on hop count and link utilization, which can avoid choosing The path optimizes the network transmission performance. Based on the routing strategy of the path selection algorithm, the construction of a space-ground integrated network with satellite MPLS as the main body must have an efficient routing strategy based on ISL (Inter-satellite Link). The MPLS-based spatial information network routing method needs to know the remaining bandwidth and traffic on each link, and choos...
Embodiment 2
[0084] Please refer to Table 2, Table 3, Table 4, and Table 5. The implementation based on the path selection algorithm is as follows:
[0085] The data transmission process in the MPLS network is realized according to the above routing algorithm. This application adopts VPI / VCI (VPI represents path, and VCI represents link node value. The VPI=1 of regulation LSP1, the VPI=2 of LSP2, the VPI=3 of LSP3) are used as satellite MPLS label, and two kinds of networks of ATM and IP are included In a unified system, the realization process is as follows figure 1 shown. The working process of satellite MPLS can be divided into two stages: forwarding table generation and data forwarding.
[0086] Forwarding table generation phase
[0087] (1) The satellite edge router LER1 determines that the received fixed-length data is an ATM cell, and the variable-length data is an IP packet. LER1 divides and reassembles the IP packet into 44-byte fixed-length data, and loads it into the packet ...
Embodiment 3
[0104] Please refer to Table 6, figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , as shown in Table 7, the routing method of spatial information network based on MPLS, verification and analysis are as follows:
[0105] This application adopts Iridium satellite constellation topology, uses OPNET network simulation software to simulate the performance of satellite MPLS fusion network, compares it with NO-MPLS (using traditional interior gateway protocol IGP), and compares the algorithm of this application with the OSPF algorithm. The satellite MPLS network model structure is as follows: figure 2 As shown, among them, node 0 sends IP packet to node 10, and node 1 sends ATM packet to node 11. Establish two LSPs, namely LSP1: LER1—>LSR1—>LSR2—LER2; LSP2: LER1—>LSR1—>LSR4—>LER2.
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