Recovery methods for restoring service in a distributed radio access network
First Claim
1. A method implemented by an access node in a mobile communication network comprising a plurality of access nodes, said method comprising:
- maintaining a local database at an access node, said local database comprising a list of peer access nodes and corresponding states of the peer access nodes;
receiving notification messages from one or more monitoring entities indicating changes in the states of said peer access nodes; and
updating said local database responsive to said notification messages to reflect the current state of the peer access nodes.
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Accused Products
Abstract
A mobile communication network includes a plurality of access nodes that can serve different roles in support of a communication session with a mobile station. An access node can serve as a connecting node that receives access requests the mobile station, as an anchor node to anchor a radio packet connection with a core network for the communication session; or as a primary node to store session information for the communication session. One or more monitoring entities monitor the availability of the access nodes and broadcast notification messages to other access nodes when an access node failure is detected. The broadcast message includes the identity of the failed access node. Other access nodes may take action to restore connections and recover session information maintained by the failed access node.
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Citations
16 Claims
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1. A method implemented by an access node in a mobile communication network comprising a plurality of access nodes, said method comprising:
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maintaining a local database at an access node, said local database comprising a list of peer access nodes and corresponding states of the peer access nodes;
receiving notification messages from one or more monitoring entities indicating changes in the states of said peer access nodes; and
updating said local database responsive to said notification messages to reflect the current state of the peer access nodes. - View Dependent Claims (2, 3, 4)
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5. A recovery method implemented by an anchor node in a mobile communication network comprising a plurality of access nodes, said method comprising:
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receiving a notification message indicating that a peer access node serving as a primary node of a communication session is unavailable; and
identifying itself as the anchor node to a secondary node responsive to said notification message.
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6. A recovery method implemented by an anchor node in a mobile communication network comprising a plurality of access nodes, said method comprising:
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receiving a notification message indicating that a peer access node serving as a primary node of a communication session is unavailable; and
transferring session information for the communication session to a secondary node responsive to said notification message.
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7. A recovery method implemented by a primary node in a mobile communication network comprising a plurality of access nodes, said method comprising:
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receiving a notification message indicating that a peer access node serving as a anchor node for a communication session is unavailable; and
establishing a new radio packet connection for the communication session responsive to said notification message.
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8. A recovery method implemented by a primary node in a mobile communication network comprising a plurality of access nodes, said method comprising:
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receiving a notification message indicating that a peer access node serving as a anchor node for a communication session is unavailable;
selecting a peer access node to serve as a new anchor node; and
sending a handoff directive to the peer access node selected to serve as the new anchor node.
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9. A mobile communication network implemented by an access node in a mobile communication network comprising a plurality of access nodes, each said access node including a control unit operative to:
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maintain a local database comprising a list of peer access nodes and corresponding states of the peer access nodes;
receive notification messages from one or more monitoring entities indicating changes in the states of said peer access nodes; and
update said local database responsive to said notification messages to reflect the current state of the peer access nodes. - View Dependent Claims (10, 11, 12)
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13. An anchor node in a mobile communication network comprising a plurality of access nodes, said anchor node including a control unit operative to:
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receiving a notification message indicating that a peer access node serving as a primary node of a communication session is unavailable; and
identifying itself as the anchor node to a secondary node responsive to said notification message.
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14. An anchor node in a mobile communication network comprising a plurality of access nodes, said anchor node including a control unit operative to:
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receiving a notification message indicating that a peer access node serving as a primary node of a communication session is unavailable; and
transferring session information for the communication session to a secondary node responsive to said notification message.
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15. A primary node in a mobile communication network comprising a plurality of access nodes, said primary node including a control unit operative to:
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receiving a notification message indicating that a peer access node serving as a anchor node for a communication session is unavailable; and
establishing a new radio packet connection for the communication session responsive to said notification message.
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16. A primary node in a mobile communication network comprising a plurality of access nodes, said primary node including a control unit operative to comprising:
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receiving a notification message indicating that a peer access node serving as a anchor node for a communication session is unavailable;
selecting a peer access node to serve as a new anchor node; and
sending a handoff directive to the peer access node selected to serve as the new anchor node.
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Specification