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US 2020/0092719 A1Published application
Method and apparatus for identifying security key in next generation mobile communication system
AssigneeSamsung Electronics Co., Ltd.
InventorsDonggun KIM, Soenghun KIM
Life of this patent
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Abstract
The disclosure relates to a communication scheme and system for converging a 5th generation (5G) communication system for supporting a data rate higher than that of a 4th generation (4G) system with an internet of things (IoT) technology. The disclosure is applicable to intelligent services (e.g., smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, and security and safety-related services) based on the 5G communication technology and the IoT-related technology. The disclosure relates to a method and apparatus for allowing a base station to identify a ciphering key (COUNT value) for security enhancement.
Claims20
A method of a terminal in a wireless communication system, the method comprising:
- receiving, from a base station, a first message including a first list associated with count values of the base station, the first list including at least one bearer identity, at least one first downlink count value of the base station associated to each bearer, and at least one first uplink count value of the base station associated to each bearer;
- determining whether a first bearer is configured with a new radio (NR) packet data convergence protocol (PDCP);
- in case that the first bearer is configured with the NR PDCP, and at least one of a second downlink count value of the terminal associated to the first bearer is different from the first downlink count value associated to the first bearer or a second uplink count value of the terminal associated to the first bearer is different from the first uplink count value associated to the first bearer, generating a second list associated with count values of the terminal including a first bearer identity of the first bearer, the second downlink count value of the terminal associated to the first bearer, and the second uplink count value of the terminal associated to the first bearer;
- and
- transmitting, to the base station, a second message including the second list as a response to the first message, wherein the second downlink count value of the terminal associated to the first bearer is a count value of a next PDCP service data unit (SDU) expected to be received—1, and the second uplink count value of the terminal associated to the first bearer is a count value of a next PDCP SDU to be transmitted—1.
2 more elements
A method of a base station in a wireless communication system, the method comprising:
- transmitting, to a terminal, a first message including a first list associated with count values of the base station, the first list including at least one bearer identity, at least one first downlink count value of the base station associated to each bearer, and at least one first uplink count value of the base station associated to each bearer;
- and
- receiving, from the terminal, a second message including a second list associated with count values of the terminal including a first bearer identity of a first bearer, a second downlink count value of the terminal associated to the first bearer, and a second uplink count value of the terminal associated to the first bearer, as a response to the first message, in case that the first bearer is configured with a new radio (NR) packet data convergence protocol (PDCP), and at least one of the second downlink count value of the terminal associated to the first bearer is different from the first downlink count value associated to the first bearer or the second uplink count value of the terminal associated to the first bearer is different from the first uplink count value associated to the first bearer,
- wherein the second downlink count value of the terminal associated to the first bearer is a count value of a next PDCP service data unit (SDU) expected to be received—1, and the second uplink count value of the terminal associated to the first bearer is a count value of a next PDCP SDU to be transmitted—1.
1 more element
A terminal in a wireless communication system, the terminal comprising:
- a transceiver;
- and
- a controller configured to:
- control the transceiver to receive, from a base station, a first message including a first list associated with count values of the base station, the first list including at least one bearer identity, at least one first downlink count value of the base station associated to each bearer, and at least one first uplink count value of the base station associated to each bearer,
- determine whether a first bearer is configured with a new radio (NR) packet data convergence protocol (PDCP),
- in case that the first bearer is configured with the NR PDCP, and at least one of a second downlink count value of the terminal associated to the first bearer is different from the first downlink count value associated to the first bearer or a second uplink count value of the terminal associated to the first bearer is different from the first uplink count value associated to the first bearer, generate a second list associated with count values of the terminal including a first bearer identity of the first bearer, the second downlink count value of the terminal associated to the first bearer, and the second uplink count value of the terminal associated to the first bearer, and
- control the transceiver to transmit, to the base station, a second message including the second list as a response to the first message,
- wherein the second downlink count value of the terminal associated to the first bearer is a count value of a next PDCP service data unit (SDU) expected to be received—1, and the second uplink count value of the terminal associated to the first bearer is a count value of a next PDCP SDU to be transmitted—1.
5 more elements
A base station in a wireless communication system, the base station comprising:
- a transceiver;
- and
- a controller configured to:
- control the transceiver to transmit, to a terminal, a first message including a first list associated with count values of the base station, the first list including at least one bearer identity, at least one first downlink count value of the base station associated to each bearer, and at least one first uplink count value of the base station associated to each bearer, and
- control the transceiver to receive, from the terminal, a second message including a second list associated with count values of the terminal including a first bearer identity of a first bearer, a second downlink count value of the terminal associated to the first bearer, and a second uplink count value of the terminal associated to the first bearer, as a response to the first message, in case that the first bearer is configured with a new radio (NR) packet data convergence protocol (PDCP), and at least one of the second downlink count value of the terminal associated to the first bearer is different from the first downlink count value associated to the first bearer or the second uplink count value of the terminal associated to the first bearer is different from the first uplink count value associated to the first bearer,
- wherein the second downlink count value of the terminal associated to the first bearer is a count value of a next PDCP service data unit (SDU) expected to be received—1, and the second uplink count value of the terminal associated to the first bearer is a count value of a next PDCP SDU to be transmitted—1.
3 more elements
Dependencies are inferred from the claim text.