A method and device for establishing a cross-layer path
A method of establishing a path and a technology, which is applied in the field of communication, and can solve the problems that the path to be established cannot be successfully established, and the path to be established cannot meet the bandwidth requirements, etc.
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Embodiment 1
[0115] An embodiment of the present invention provides a method for establishing a cross-layer path, such as figure 1 shown, including:
[0116] S101. The upper-layer PCE determines the upper-layer path information of the LSP to be established, the first node identifier of the lower-layer path, and the last-node identifier of the lower-layer path according to the identifier of the upper-layer head node, the identifier of the upper-layer end node, and the bandwidth requirement of the LSP to be established. .
[0117] Wherein, the upper-layer path information includes the identifier of the upper-layer node that the LSP to be established passes through. The lower-layer path serves as the bottom-layer path of the LSP to be established, and is used to carry upper-layer service data. Bandwidth requirements are used to characterize the bandwidth requirements of upper layer services.
[0118]It should be noted that the LSP to be established is an LSP that meets the above bandwidth ...
Embodiment 2
[0134] An embodiment of the present invention provides a method for establishing a cross-layer path, such as image 3 shown, including:
[0135] S201. The lower-layer PCE receives a path establishment message from the upper-layer PCE.
[0136] Wherein, the path establishment message is used to instruct the head node of the lower layer to establish the lower layer path as the bottom layer path of the LSP to be established, so as to carry the upper layer service data. The path establishment message may include: the identifier of the first node of the lower path, the identifier of the last node of the lower path, and bandwidth requirements.
[0137] Wherein, the first node of the lower layer path is the starting node of the lower layer path of the LSP to be established, and the last node of the lower layer path is the termination node of the lower layer path of the LSP to be established.
[0138] S202. The lower-layer PCE determines whether there is an established lower-layer p...
Embodiment 3
[0146] An embodiment of the present invention provides a method for establishing a cross-layer path, such as Figure 4 shown, including:
[0147] S301. The lower-layer PCE receives a path establishment message from the upper-layer PCE.
[0148] Wherein, the path establishment message is used to instruct the head node of the lower layer to establish the lower layer path as the bottom layer path of the LSP to be established, so as to carry the upper layer service data. The path establishment message may include: the identifier of the lower layer path.
[0149] S302. The lower-layer PCE determines whether there is an established lower-layer path in the lower layer that matches the identifier of the lower-layer path in the path establishment message.
[0150] If there is no established lower-layer path in the lower layer that matches the identifier of the lower-layer path in the above-mentioned path establishment message, execute S303 first, and then execute S304; if there is an...
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