Method for managing packets in a network of information centric networking (ICN) nodes

1. A method for managing packets in a network of Information Centric Networking (ICN) nodes, the method comprising:

at a first node, performing by a processor of the first node steps of:

Receiving a request for a data packet,

if the data packet is stored by the first node,

responding to the request by forwarding the data packet;

otherwise:

sending to at least one neighboring node of the network a request for meta-data packets, at least one meta-data packet of said meta-data packets indicating availability of said data packet at at least one target node;

receiving in response said at least one meta-data packet indicating availability of said data packet, so as to identify at least one target node wherein said data packet is available;

selecting one target node among said identified at least one target node;

forwarding the request for said data packet toward the selected target node;

receiving in response the data packet;

responding to the request for said data packet by forwarding the data packet;

at a second node, performing by a processor of the second node steps of:

Receiving the request for meta-data packets,

if the data packet is stored by the second node,

responding to the request for meta-data packets by sending a meta-data packet indicating availability of said data packet at the second node; otherwise

forwarding to at least one neighboring node of the network the request for meta-data packets.

2. A method for managing packets according to claim 1 , wherein said at least one meta-data packet indicating availability of said data packet is a header of the data packet.

3. A method for managing packets according to claim 1 , wherein the at least one neighboring node to which a request for meta-data packets is sent or forwarded, is/are chosen according to a given forwarding policy.

4. A method for managing packets according to claim 3 , wherein the given forwarding policy is scoped flooding within a given exploration radius.

5. A method for managing packets according to claim 1 , wherein the step of receiving at the first node the data packet from the selected target node comprises caching the data packet at the first node and/or any node through which the first node is connected to the selected target node, according to a given caching decision policy.

6. A method for managing packets according to claim 5 , wherein the given caching decision policy is Leave a Copy Down (LCD).

7. A method for managing packets according to claim 1 , further comprising, upon receiving at the first node the data packet from the selected target node, deleting the data packet in at least one identified target node according to a given cache replacement policy.

8. A method for managing packets according to claim 7 , wherein the given cache replacement policy is chosen between Least Recently Used (LRU) and random replacement.

9. A method for managing packets according to claim 1 , wherein the selected target node is either a target node from which is firstly received at the first node a meta-data packet indicating availability of said data packet, or a target node which is the closest in number of hops or the least loaded.

10. A method for managing packets according to claim 1 , further comprising:

at the second node, performing by the processor of the second node the steps of:

Receiving a second request for a second data packet,

if the second data packet is stored by the second node,

responding to the second request by forwarding the second data packet;

otherwise:

sending to at least one neighboring node of the network a second request for meta-data packets indicating availability of said second data packet;

receiving in response said at least one meta-data packet indicating availability of said second data packet, so as to identify at least one second target node wherein said second data packet is available;

selecting one second target node among said identified at least one second target node;

forwarding the second request for said second data packet toward the selected second target node;

receiving in response the second data packet;

responding to the second request for said second data packet by forwarding the second data packet;

at a third node, performing by a processor of the third node steps of:

Receiving the second request for meta-data packets,

if the data packet is stored by the third node,

responding to the second request for meta-data packets by forwarding a meta-data packet indicating availability of said second data packet at the third node;

otherwise

forwarding to at least one neighboring node of the network the second request for meta-data packets.

11. An Information Centric Networking (ICN) node in a network, comprising at least one processor configured so as to perform:

if receiving a request for a data packet,

if the data packet is stored by the node,

responding to the request by forwarding the data packet;

otherwise

sending to at least one neighboring node of the network a request for meta-data packets, at least one meta-data packet of said meta-data packets indicating availability of said data packet at at least one target node;

receiving in response said at least one meta-data packet indicating availability of said data packet, so as to identify at least one target node wherein said data packet is available;

selecting one target node among said identified at least one target node;

forwarding the request for said data packet toward the selected target node;

receiving in response the data packet;

responding to the request for said data packet by forwarding the data packet;

if receiving the request for meta-data packets,

if the data packet is stored by the node,

responding to the request for meta-data packets by sending a meta-data packet indicating availability of said data packet at the node;

otherwise

forwarding to at least one neighboring node of the network the request for meta-data packets.

12. A network of Information Centric Networking (ICN) nodes comprising:

a first node according to claim 11 ; and

a second node comprising at least one processor configured so as to perform:

if receiving the request for a data packet,

if the data packet is stored by the second node,

responding to the request by forwarding the data packet;

otherwise

sending to at least one neighboring node of the second node in the network a second request for second meta-data packets, at least one meta-data packet of said second meta-data packets indicating availability of said data packet at at least one second target node;

receiving in response said at least one meta-data packet indicating availability of said data packet, so as to identify at least one second target node wherein said data packet is available;

selecting one second target node among said identified at least one second target node;

forwarding the request for said data packet toward the selected second target node;

receiving in response the data packet;

responding to the request for said data packet by forwarding the data packet;

if receiving the request for meta-data packets,

if the data packet is stored by the second node,

responding to the request for meta-data packets by sending a second meta-data packet indicating availability of said data packet at the second node;

otherwise

forwarding to at least one neighboring node of the second node in the network the request for meta-data packets.

13. A non-transitory computer-readable medium comprising computer program instructions that, when executed by a processor, cause the processor to execute the steps of the method according to claim 1 for managing packets in a network of Information Centric Networking (ICN) nodes.