Method and device for controlling congestion in mobile communication system
The present invention relates to a method and a device for controlling congestion in a mobile communication system. A method for controlling congestion of a network node according to the present invention comprises the steps of: receiving congestion-related information from at least one base station; transmitting a user equipment information request message for making a request for information on a piece of user equipment corresponding to the base station to a mobility management entity; receiving a user equipment information response message including the information on the user equipment corresponding to the base station from the mobility management entity; and transmitting the information on the piece of user equipment corresponding to the base station to another core network node.
1. A method by a first entity in a mobile communication system, the method comprising:
receiving a service request message for circuit switched (CS) fall-back from a terminal;
deriving a CS security key based on a key associated with a packet switched (PS) domain; and
transmitting a mobility management (MM) context including the CS security key to a second entity, the CS security key being used between the terminal and the second entity.
2. The method of claim 1 , wherein the first entity includes a mobility management entity (MME) in a first network, and the second entity includes at least one of a mobile switching center (MSC) or visitor location register (VLR) in a second network.
3. The method of claim 1 , wherein the PS domain includes at least one of a E-UTRAN domain or EPS domain.
4. The method of claim 3 , wherein the key associated with the PS domain includes a security key (K ASME ) used to derive a security key of an eNodeB (eNB).
5. A method by a terminal in a mobile communication system, the method comprising:
transmitting a service request message for circuit switched (CS) fall-back to a first entity;
deriving a CS security key based on a key associated with a packet switched (PS) domain; and
performing a CS call establishment procedure based on the CS security key.
6. The method of claim 5 , wherein an MM context including the CS security key is transmitted from the first entity to a second entity,
wherein the first entity includes a mobility management entity (MME) in a first network, and the second entity includes at least one of a mobile switching center (MSC) or visitor location register (VLR) in a second network.
7. The method of claim 5 , wherein the PS domain includes at least one of a E-UTRAN domain or EPS domain.
8. The method of claim 7 , wherein the key associated with the PS domain includes a security key (K ASME ) used to derive a security key of an eNodeB (eNB).
9. A first entity in a mobile communication system, the first entity comprising:
a transceiver; and
a controller configured to:
control the transceiver to receive a service request message for circuit switched (CS) fall-back from a terminal,
derive a CS security key based on a key associated with a packet switched (PS) domain, and
control the transceiver to transmit a mobility management (MM) context including the CS security key to a second entity, the CS security key being used between the terminal and the second entity.
10. The first entity of claim 9 , wherein the first entity includes a mobility management entity (MME) in a first network, and the second entity includes at least one of a mobile switching center (MSC) or visitor location register (VLR) in a second network.
11. The first entity of claim 9 , wherein the PS domain includes at least one of a E-UTRAN domain or EPS domain.
12. The first entity of claim 11 , wherein the key associated with the PS domain includes a security key (KASME) used to derive a security key of an eNodeB (eNB).
13. A terminal in a mobile communication system, the terminal comprising:
a transceiver; and
a controller configured to:
control the transceiver to transmit a service request message for circuit switched (CS) fall-back to a first entity;
derive a CS security key based on a key associated with a packet switched (PS) domain; and
perform a CS call establishment procedure based on the CS security key.
14. The terminal of claim 13 , wherein an MM context including the CS security key is transmitted from the first entity to a second entity,
wherein the first entity includes a mobility management entity (MME) in a first network, and the second entity includes at least one of a mobile switching center (MSC) or visitor location register (VLR) in a second network.
15. The terminal of claim 13 , wherein the PS domain includes at least one of a E-UTRAN domain or EPS domain.
16. The terminal of claim 15 , wherein the key associated with the PS domain includes a security key (K ASME ) used to derive a security key of an eNodeB (eNB).