Network-initiated session recovery
View Patent ↗Techniques for network-initiated session recovery are described. A relationship is maintained between two identifiers both associated with a session between a first device and an access terminal in a wireless network. The first identifier is associated with the first device, and the second identifier is associated with a second device in communication with the first device. After a breach of the session, communications associated with the session are preserved based on the relationship between the first and second identifiers.
1. A method comprising:
assigning first and second identifiers to a session between an access terminal and a first device of a wireless network, the first identifier being associated with the access terminal and the second identifier corresponding to a communication path between the first device and a second device of the wireless network, the communication path being configured to transport data corresponding to the session;
establishing a relationship between the first identifier and the second identifier, wherein establishing the relationship comprises incorporating into the first identifier information corresponding to a number of times the first device was rebooted;
extracting a reboot value from the second identifier, the second identifier included in a data packet received from the second device;
comparing the reboot value to a reboot count received from the first device; and
determining that the first identifier was assigned before the first device was last rebooted if the reboot count is greater than the reboot value.
2. The method of claim 1 , wherein assigning the first and second identifiers comprises complying with a 1x Evolution-Data Optimized protocol.
3. The method of claim 1 , wherein establishing a relationship comprises including at least a portion of the first identifier in the second identifier.
4. The method of claim 1 , wherein establishing a relationship comprises including, in the first identifier, a unique identifier corresponding to the first device.
5. The method of claim 1 , wherein the first device comprises a radio network controller.
6. The method of claim 1 , further comprising receiving the second identifier in a data packet that is transported from the second device to the access terminal over the communication path.
7. The method of claim 1 , wherein the second device comprises a packet data serving node.
8. The method of claim 1 , wherein assigning a first identifier comprises assigning a Universal Access Terminal Identifier (UATI) to the session.
9. The method of claim 1 , wherein assigning a second identifier comprises assigning a Packet Session Identifier (PSI) to the session.
10. A radio network controller configured to establish a session with an access terminal, the radio network controller comprising:
a controller:
assigning first and second identifiers to the session between the access terminal and the radio network controller, with the first identifier being associated with the access terminal and the second identifier corresponding to a communication path between the radio network controller and a second device of the wireless network, the communication path being configured to transport data corresponding to the session;
establishing a relationship between the first identifier and the second identifier by incorporating into the first identifier information corresponding to a number of times the radio network controller was rebooted;
extracting a reboot value from the second identifier, the second identifier included in a data packet received from the second device;
comparing the reboot value to a reboot count received from the radio network controller; and
determining that the first identifier was assigned before the radio network controller was last rebooted if the reboot count is greater than the reboot value.
11. The radio network controller of claim 10 , wherein the controller is configured to:
include at least a portion of the first identifier in the second identifier.
12. The radio network controller of claim 10 , wherein the controller is configured to:
include, in the first identifier, a unique identifier corresponding to the radio network controller.
13. The radio network controller of claim 10 , wherein the controller is configured to:
receive the second identifier in a data packet that is transported from the second device to the access terminal over the communication path.
14. The radio network controller of claim 10 , wherein the second device comprises a packet data serving node.
15. The radio network controller of claim 10 , wherein the controller is configured to:
assign a Universal Access Terminal Identifier (UATI) to the session.
16. The radio network controller of claim 10 , wherein the controller is configured to:
assign a Packet Session Identifier (PSI) to the session.
17. The radio network controller of claim 10 , wherein the controller is configured to:
comply with a 1x Evolution-Data Optimized protocol.
18. A machine-readable storage device bearing instructions to cause a radio network controller to:
assign first and second identifiers to a session between an access terminal and a first device of a wireless network, with the first identifier being associated with the access terminal and the second identifier corresponding to a communication path between the first device and a second device of the wireless network, the communication path being configured to transport data corresponding to the session;
establish a relationship between the first identifier and the second identifier by incorporating into the first identifier information corresponding to a number of times the first device was rebooted;
extract a reboot value from the second identifier, the second identifier included in a data packet received from the second device;
compare the reboot value to a reboot count received from the first device; and
determine that the first identifier was assigned before the first device was last rebooted if the reboot count is greater than the reboot value.
19. The machine-readable storage device of claim 18 , wherein instructions to establish the relationship comprise instructions to cause the radio network controller to:
include at least a portion of the first identifier in the second identifier.
20. The machine-readable storage device of claim 18 , wherein instructions to establish the relationship comprise instructions to cause the radio network controller to:
include, in the first identifier, a unique identifier corresponding to the first device.
21. The machine-readable storage device of claim 18 , further comprising instructions to cause the radio network controller to:
receive the second identifier in a data packet that is transported from the second device to the access terminal over the communication path.
22. The machine-readable storage device of claim 18 , wherein the second device comprises a packet data serving node.
23. The machine-readable storage device of claim 18 , wherein instructions to assign a first identifier comprise instructions to cause the radio network controller to:
assign a Universal Access Terminal Identifier (UATI) to the session.
24. The machine-readable storage device of claim 18 , wherein instructions to assign a second identifier comprise instructions to cause the radio network controller to:
assign a Packet Session Identifier (PSI) to the session.
25. The machine-readable storage device of claim 18 , further comprising instructions to cause the radio network controller to:
comply with a 1x Evolution-Data Optimized protocol.