Method for establishing session in label switch network and label switch node
First Claim
1. A method for establishing a session in a label switch network comprising a plurality of label switch nodes having a function of routing a received packet according to label information distributed by a predetermined label distribution protocol, wherein:
- message exchange between adjacent label switch nodes by said label distribution protocol is performed by adding session identification information to the message for identifying a session to be established between the same adjacent label switch nodes; and
the same adjacent label switch nodes respectively establish a plurality of sessions to be used in the same label space between the same adjacent label switch nodes based on the session identification information.
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Accused Products
Abstract
In a label switch network such as an MPLS, message exchange between adjacent label switch nodes by a label distribution protocol is performed by adding session identification information to the message for identifying a session to be established between the nodes, and the nodes respectively establish a plurality of sessions to be used in the same label space between the same adjacent label switch nodes based on the session identification information. As such, the simplification in designing, the improvement in flexibility, the improvement in efficiency of maintenance/operation/management, etc., of the label switch network can be expected.
56 Citations
16 Claims
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1. A method for establishing a session in a label switch network comprising a plurality of label switch nodes having a function of routing a received packet according to label information distributed by a predetermined label distribution protocol,
wherein: -
message exchange between adjacent label switch nodes by said label distribution protocol is performed by adding session identification information to the message for identifying a session to be established between the same adjacent label switch nodes; and
the same adjacent label switch nodes respectively establish a plurality of sessions to be used in the same label space between the same adjacent label switch nodes based on the session identification information. - View Dependent Claims (6)
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2. A method for establishing a session in a label switch network comprising a plurality of label switch nodes having a function of routing a received packet according to label information distributed by a predetermined label distribution protocol,
wherein: -
message exchange between adjacent label switch nodes by said label distribution protocol is performed by adding session type information to the message for explicitly indicating one of or both of an application and its usage utilizing a session to be established between said adjacent label switch nodes; and
said adjacent label switch nodes respectively establish the sessions in accordance with said session type information between said adjacent label switch nodes based on the session type information. - View Dependent Claims (4, 5)
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3. A method for establishing a session in a label switch network comprising a plurality of label switch nodes having a function of routing a received packet according to label information distributed by a predetermined label distribution protocol,
wherein: -
message exchange between adjacent label switch nodes by said label distribution protocol is performed by adding session identification information to the message for identifying a session to be established between the adjacent same label switch nodes as well as session type information explicitly indicating one of or both of an application and its usage utilizing said session; and
the same adjacent label switch nodes respectively establish a plurality of sessions to be used in the same label space between the same adjacent label switch nodes based on the session identification information as well as said session type information.
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7. A label switch node having a function of routing a received packet according to label information distributed by a predetermined label distribution protocol, comprising:
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a label distribution protocol processing section adapted to perform exchange of said message by adding session identification information for identifying a session to be established between the same adjacent label switch nodes to a message to be transmitted to and received from an adjacent label switch node by said label distribution protocol; and
a session establishment control section for controlling the establishment of a plurality of sessions to be used in the same label space with said adjacent label switch node based on session identification information added to a message by the label distribution protocol received from said adjacent label switch node by said label distribution protocol processing section. - View Dependent Claims (12, 13, 14, 15, 16)
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8. A label switch node having a function of routing a received packet according to label information distributed by a predetermined label distribution protocol, comprising:
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a label distribution protocol processing section adapted to perform exchange of said message by adding session type information explicitly indicating one of or both of an application and its usage utilizing a session to be established with said adjacent label switch node to a message to be transmitted to and received from an adjacent label switch node by said label distribution protocol; and
a session establishment control section for controlling the establishment of said session in accordance with said session type information with said adjacent label switch node based on session type information added to a message by said label distribution protocol received from said adjacent label switch node by said label distribution protocol processing section. - View Dependent Claims (10, 11)
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9. A label switch node having a function of routing a received packet according to label information distributed by a predetermined label distribution protocol, comprising:
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a label distribution protocol processing section adapted to perform exchange of said message by adding session identification information for identifying a session to be established with said adjacent label switch node as well as session type information explicitly indicating one of or both of an application and its usage utilizing said session to a message to be transmitted to and received from an adjacent label switch node by said label distribution protocol; and
a session establishment control section for controlling the establishment of a plurality of sessions in accordance with said session type information to be used in the same label space with said adjacent label switch node based on session identification information and session type information added to a message by said label distribution protocol received from said adjacent label switch node by said label distribution protocol processing section.
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Specification