Session migration over content-centric networks
View Patent ↗One embodiment of the present invention provides a system for facilitating session migration. During operation, the system receives a communication packet from a client destined to a remote server. The system determines whether the communication packet belongs to a pre-existing communication session, and whether session state information associated with the session is available locally. In response to the communication packet belonging to a pre-existing communication session and the session state information being unavailable locally, the system constructs an interest requesting the session state information, disseminates the interest over a network, and receives the session state information.
1. A computer-executable method for facilitating session migration, comprising:
receiving, at an intermediary network device, a communication packet from a client destined to a remote server;
determining whether the communication packet belongs to a pre-existing communication session;
determining whether state information associated with the communication session is available at the intermediary network device;
in response to the communication packet belonging to the pre-existing communication session and the session state information being unavailable, constructing a content-centric network (CCN) interest packet corresponding to the communication session based at least on an address of the client and a sequence number of the communication packet, wherein the interest packet comprises a first CCN name, which is a location-independent hierarchically structured variable-length name;
disseminating the interest packet over a network; and
receiving a session-data packet in response to disseminating the interest packet, wherein the session-data packet includes a second CCN name whose prefix matches the first CCN name included in the interest packet, and wherein the session-data packet includes the session state information, thereby facilitating session migration.
2. The method of claim 1 , further comprising reconstructing the pre-existing communication session using the received session state information.
3. The method of claim 1 , wherein the client is a mobile device, and wherein the communication packet is a wireless Transmission Control Protocol (TCP) packet.
4. The method of claim 3 , wherein the interest packet is constructed based on a transport signature included in the wireless TCP packet, and wherein the transport signature identifies the session.
5. The method of claim 3 , wherein the intermediary network device is located at a wireless base transceiver station.
6. The method of claim 1 , wherein the client is virtual private network (VPN)-enabled, and wherein the communication packet is a VPN packet.
7. The method of claim 6 , wherein the interest packet is constructed based on a transport signature corresponding to a VPN tunnel.
8. The method of claim 6 , wherein the intermediary network device is a VPN host.
9. A system, comprising:
a number of intermediary network devices coupled to a network, wherein at least one intermediary network device comprises:
a processor;
a memory storing instructions that when executed by a computer cause the computer to perform a method for facilitating session migration, the method comprising:
receiving a communication packet from a client destined to a remote server;
determining whether the communication packet belongs to a pre-existing communication session;
determining whether state information associated with the communication session is available at the intermediary network device;
constructing a content-centric network (CCN) interest packet corresponding to the communication session based at least on an address of the client and a sequence number of the communication packet, in response to the communication packet belonging to the pre-existing communication session and the session state information being unavailable at the intermediary network device, wherein the interest packet comprises a first CCN name, which is a location-independent hierarchically structured variable-length name;
disseminating the interest packet over the network; and
receiving a session-data packet in response to disseminating the interest packet, wherein the session-data packet includes a second CCN name whose prefix matches the first CCN name included in the interest packet, and wherein the session-data packet includes the session state information, thereby facilitating session migration.
10. The system of claim 9 , wherein the method further comprises reconstructing the pre-existing communication session using the received session state information.
11. The system of claim 9 , wherein the client is a mobile device, and wherein the communication packet is a wireless Transmission Control Protocol (TCP) packet.
12. The system of claim 11 , wherein the interest packet is constructed based on a transport signature included in the wireless TCP packet, and wherein the transport signature identifies the session.
13. The system of claim 11 , wherein the intermediary network devices are located at base transceiver stations.
14. The system of claim 9 , wherein the client is virtual private network (VPN)-enabled, and wherein the communication packet is a VPN packet.
15. The system of claim 14 , wherein the interest packet is constructed based on a transport signature corresponding to a VPN tunnel.
16. The system of claim 14 , wherein the intermediary network devices are VPN hosts.
17. A non-transitory computer-readable storage medium storing instructions that when executed by a computer cause the computer to perform a method for facilitating session migration, the method comprising:
receiving, at an intermediary network device, a communication packet from a client destined to a remote server;
determining whether the communication packet belongs to a pre-existing communication session;
determining whether state information associated with the session is available at the intermediary network device;
in response to the communication packet belonging to the pre-existing communication session and the session state information being unavailable at the intermediary network device, constructing a content-centric network (CCN) interest packet corresponding to the communication session based at least on an address of the client and a sequence number of the communication packet, wherein the interest packet comprises -a first CCN name, which is a location-independent hierarchically structured variable-length name;
disseminating the interest over a network; and
receiving a session-data packet in response to disseminating the interest packet, wherein the session-data packet includes a second CCN name whose prefix matches the first CCN name included in the interest packet, and wherein the session-data packet includes the session state information.
18. The storage medium of claim 17 , wherein the method further comprises reconstructing the pre-existing communication session using the received session state information.
19. The storage medium of claim 17 , wherein the client is a mobile device, and wherein the communication packet is a wireless TCP packet.
20. The storage medium of claim 19 , wherein the interest packet is constructed based on a transport signature included in the wireless TCP packet, and wherein the transport signature identifies the session.
21. The storage medium of claim 19 , wherein the intermediary network device is located at a base transceiver station.
22. The storage medium of claim 17 , wherein the client is virtual private network (VPN)-enabled, and wherein the communication packet is a VPN packet.