Method, apparatus and system for advertising routing protocol message and calculating route

1. A method for advertising a routing protocol message in a wavelength division multiplexing network, the method comprising:

obtaining node information and link information of a node, wherein the node information contains port cross-connection capability information of the node, and the link information contains wavelength restriction information and wavelength status information of each link connected to the node; wherein obtaining the node information of the node further comprises obtaining at least one of the following: wavelength conversion capability information of the node, impairment information at node level, or port to port impairment information inside the node;

carrying the obtained node information and link information in a Type-Length-Value (TLV) of a routing protocol message, and advertising the routing protocol message in the network;

wherein obtaining the link information of the node further comprises obtaining link impairment information on each port of the node; and

wherein the wavelength conversion capability information of the node comprises: whether a wavelength converter in the node is connected to an ingress port and an egress port of the node, a range of wavelengths is converted by the wavelength converter, and whether the wavelength converter is available or occupied.

2. The method according to claim 1 , wherein carrying the obtained node information and link information in the TLV of the routing protocol message comprises:

in the routing protocol message, carrying the port cross-connection capability information of the node in a TLV for describing a node attribute, and carrying the wavelength restriction information and wavelength status information of each link connected to the node in a TLV for describing a link attribute.

3. The method according to claim 2 , wherein carrying the obtained node information and link information in the TLV of the routing protocol message further comprises:

in the routing protocol message, carrying the wavelength conversion capability information of the node, the impairment information at node level, and the port to port impairment information inside the node in a TLV for describing a node attribute, and carrying the link impairment information on each port of the node in a TLV for describing a link attribute.

4. The method according to claim 1 , wherein carrying the obtained node information and link information in the TLV of the routing protocol message comprises:

in the routing protocol message, carrying the port cross-connection capability information of the node and the wavelength restriction information and wavelength status information of each link connected to the node in a TLV for describing a link attribute.

5. A method for calculating a route in a wavelength division multiplexing network, the method comprising:

obtaining node information and link information of each node from a Type-Length-Value (TLV) of a routing protocol message advertised by each node, wherein the node information contains port cross-connection capability information of a node, and the link information contains wavelength restriction information and wavelength status information of each link connected to the node; wherein the obtained node information of each node further comprises at least one of the following: wavelength conversion capability information of the node, impairment information at node level, or port to port impairment information inside the node;

receiving a request for a service, and calculating a route satisfying a requirement of the service and assigning a wavelength to the service according to the obtained node information and link information;

wherein the obtained link information of each node further contains link impairment information on each port of the node; and

wherein the wavelength conversion capability information of each node comprises: whether a wavelength converter in the node is connected to an ingress port and an egress port of the node, a range of wavelengths is converted by the wavelength converter, and whether the wavelength converter is available or occupied.

6. The method according to claim 5 , wherein obtaining the node information and the link information of each node from the TLV of the routing protocol message advertised by each node comprises:

in the routing protocol message advertised by each node, obtaining the port cross-connection capability information of the node from a TLV for describing a node attribute, and obtaining the wavelength restriction information and wavelength status information of each link connected to the node from a TLV for describing a link attribute.

7. The method according to claim 6 , wherein obtaining the node information and the link information of each node from the TLV of the routing protocol message advertised by each node further comprises:

in the routing protocol message, obtaining the wavelength conversion capability information of the node, the impairment information at node level, and the port to port impairment information inside the node from a TLV for describing a node attribute, and obtaining the link impairment information on each port of the node from a TLV for describing a link attribute.

8. The method according to claim 5 , wherein obtaining the node information and the link information of each node from the TLV of the routing protocol message advertised by each node comprises:

in the routing protocol message advertised by each node, obtaining the port cross-connection capability information of the node and the wavelength restriction information and wavelength status information of each link connected to the node from a TLV for describing a link attribute.

9. An apparatus for advertising a routing protocol message in a wavelength division multiplexing network, the apparatus comprising:

an information obtaining unit, configured to obtain node information and link information of a node, wherein the node information comprises port cross-connection capability information of the node, and the link information comprises wavelength restriction information and wavelength status information of each link connected to the node; wherein the information obtaining unit is further configured to obtain at least one of the following: wavelength conversion capability information of the node, impairment information at node level, or port to port impairment information inside the node;

an information advertising unit, configured to carry the obtained node information and link information in a Type-Length-Value of the routing protocol message and advertise a routing protocol message in the network;

wherein the information obtaining unit is further configured to obtain link impairment information on each port of the node; and

wherein the wavelength conversion capability information of the node comprises: whether a wavelength converter in the node is connected to an ingress port and an egress port of the node, a range of wavelengths is converted by the wavelength converter, and whether the wavelength converter is available or occupied.

10. An apparatus for calculating a route in a wavelength division multiplexing network, the apparatus comprising:

an information obtaining unit, configured to obtain node information and link information of each node from a Type-Length-Value of a routing protocol message advertised by each node, wherein the node information comprises port cross-connection capability information of a node, and the link information comprises wavelength restriction information and wavelength status information of each link connected to the node; wherein the obtained node information of each node further comprises at least one of the following: wavelength conversion capability information of the node, impairment information at node level, or port to port impairment information inside the node;

a service receiving unit, configured to receive a request for a service;

a calculation unit, configured to according to the obtained node information and link information, calculate a route satisfying a requirement of the service and assign a wavelength to the service;

wherein the information obtaining unit is further configured to obtain link impairment information on each port of the node; and

wherein the wavelength conversion capability information of the node comprises: whether a wavelength converter in the node is connected to an ingress port and an egress port of the node, a range of wavelengths is converted by the wavelength converter, and whether the wavelength converter is available or occupied.

11. A system for advertising a routing protocol message and calculating a route in a wavelength division multiplexing network, the system comprising:

a routing protocol message advertising apparatus, configured to obtain node information and link information of a node, wherein the node information comprises port cross-connection capability information of the node, and the link information contains wavelength restriction information and wavelength status information of each link connected to the node; and to carry the obtained node information and link information in a Type-Length-Value (TLV) of the routing protocol message and advertise a routing protocol message in the network; wherein the node information of the node further comprises obtaining at least one of the following: wavelength conversion capability information of the node, impairment information at node level, or port to port impairment information inside the node;

a route calculation apparatus, configured to obtain node information and link information of each node from the TLV of the routing protocol message advertised by each node; receive a request for a service; and according to the obtained node information and link information, calculate a route satisfying a requirement of the service and assign a wavelength to the service

wherein the routing protocol messaging apparatus is further configured to obtain link impairment information on each port of the node; and

wherein the wavelength conversion capability information of the node comprises: whether a wavelength converter in the node is connected to an ingress port and an egress port of the node, a range of wavelengths is converted by the wavelength converter, and whether the wavelength converter is available or occupied.