CRASH RECOVERY FOR SMART OBJECTS

• US 20170005875A1
• Filed: 01/22/2015
• Published: 01/05/2017
• Est. Priority Date: 01/23/2014
• Status: Active Grant

• Current Assignee: IMEC International, Koninklijke KPN NV, Universiteit Gent Vzw
• Original Assignee: iMinds vzw, Koninklijke KPN NV, Universiteit Gent Vzw
• Inventors: Van Den Abeele, Floris, Hoebeke, Jeroen
• Granted Patent: US 10,313,198 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 41/0816 the condition being an adaptation, e.g. in response to network events
• CPC Class Codes: H04L 41/085 Retrieval of network configuration; Tracking network configuration history
• CPC Class Codes: H04L 41/12 Discovery or management of network topologies
• CPC Class Codes: H04L 67/00 Network arrangements or protocols for supporting network services or applications user-to-user messaging H04L51/00; network arrangements, protocols or services for supporting real-time applications in data packet communications networks H04L65/00
• CPC Class Codes: H04L 67/01 Protocols
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/10 in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46
• CPC Class Codes: H04L 69/40 for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection management of faults, events, alarms or notifications in data switching networks H04L41/06

Abstract

A method for enabling restoration of an operational state on a server node is disclosed. The method includes intercepting, by a state directory, traffic between the server node and a client communicably connected to the server node over a network to derive the operational state. At least a part of the traffic between the server node and the client leads to establishment of the operational state on the server node. The method further includes storing the operational state in the state directory, detecting, by the state directory, that the server node has lost the operational state, and providing, by the state directory, the operational state to the server node after detecting that the server node has lost the operational state.

Claims

1. A method for enabling restoration of an operational state on a server node, the method comprising:

intercepting, by a state directory, traffic between a client communicably connected to the server node over a network and the server node to derive the operational state, where at least a part of the traffic between the server node and the client leads to establishment of the operational state on the server node;

storing the operational state in the state directory;

detecting, by the state directory, that the server node has lost the operational state; and

providing, by the state directory, the operational state to the server node after detecting that the server node has lost the operational state.

2. The method according to claim 1, further comprising:

intercepting, by the state directory, further traffic between the server node and the client to determine that the operational state is to be removed from the state directory; and

removing the operational state from the state directory after said determination.

3. The method according to claim 1, further comprising:

determining, by the state directory, that the operational state is to be removed from the state directory as a result of the lack of further traffic between the server node and the client; and

removing the operational state from the state directory after said determination.

4. The method according to claim 1, further comprising:

receiving, at the state directory, from a further node communicably connected to the state directory over the network, a request to remove the operational state from the state directory; and

removing the operational state from the state directory after receiving said request.

5. The method according to claim 1, wherein the state directory detects that the server node has lost the operational state as a result of receiving, at the state directory, from the server node, a message indicating that the server node has lost the operational state.

6. The method according to claim 1, wherein the state directory is located in a cloud, in a gateway between the server node and the client, or in a local network comprising the server node.

7. The method according to claim 1, wherein the state directory comprises an intermediate node in the network located as to be able to monitor bootstrapping traffic from the server node and wherein the state directory detects that the server node has lost the operational state as a result of receiving, from the server node, a request for bootstrapping.

8. The method according to claim 7, wherein the state directory provides the operational state to the server node by replaying at least a portion of the part of the traffic between the server node and the client that led to the establishment of the operational state on the server node.

9. A state directory for enabling restoration of an operational state on a server node, the state directory comprising:

an interception unit for intercepting traffic between the server node and a client communicably connected to the server node over a network to derive the operational state, where at least a part of the traffic between the server node and the client leads to establishment of the operational state on the server node;

a memory for storing the operational state;

a processor for detecting that the server node has lost the operational state; and

a transmitter for providing the operational state to the server node after detecting that the server node has lost the operational state,

wherein, optionally, the state directory is further configured to implement the method of claim 1.

10. A system comprising at least one server node and a state directory of claim 9, said state directory capable of intercepting traffic between the server node and a client.

11. A computer-readable non-transitory storage medium configured for, when run on a computer, executing the method steps according to claim 1.