Method and device for establishing connection

[0031] Example 1

[0032] Such as figure 2 As shown, the present invention provides a structural block diagram of a preferred connection establishment device. The device includes: a receiving unit 202, configured to receive a call setup request; and an acquiring unit 204, configured to acquire the first node on the link in response to the call setup request The constraint information of and the constraint information of the tail node on the link; the processing unit 206 is used to determine whether the constraint information of the head node and the constraint information of the tail node meet the predetermined conditions, and if they are, the connection is established.

[0033] In the above-mentioned preferred embodiment, the system judges whether the conditions for establishing a connection are satisfied by obtaining the constraint information of the first node and the constraint information of the end nodes on the link before establishing a connection, and establishes the correspon

[0050] Example 2

[0051] based on figure 2 In the connection establishment device shown, the present invention also provides a preferred connection establishment method, such as image 3 As shown, it includes the following steps:

[0052] S302: Receive a call establishment request;

[0053] S304: Acquire the constraint information of the head node on the link and the constraint information of the tail node on the link in response to the call establishment request;

[0054] S306: Determine whether the constraint information of the head node and the constraint information of the tail node meet the predetermined conditions, and if they are satisfied, establish a connection.

[0055] In the above-mentioned preferred embodiment, the system judges whether the conditions for establishing a connection are satisfied by obtaining the constraint information of the first node and the constraint information of the end nodes on the link before establishing a connection, and establishes the correspondi

[0071] Example 3

[0072] The present invention also provides another preferred connection establishment device, such as Figure 4 As shown, the device includes: a connection controller 402, a call manager 404, and a local transmission resource adapter 406. The call manager 404 includes: a connection judgment unit 4041, a network call permission unit 4042, a user call processing unit 4043, a local constraint query unit 4044, and a network call processing unit 4045.

[0073] based on Figure 4 , The present invention also provides another preferred connection establishment method, such as Figure 5 Shown. However, it should be noted that the preferred embodiment is only for better describing the present invention, and does not constitute an improper limitation of the present invention.

[0074] This preferred embodiment describes the process of completing the establishment of the service under the condition that both the head and tail nodes use optical forwarding single boards to acces