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US 12,598,459 B2Granted
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 performed by a terminal in a wireless communication system, the method comprising:
- receiving, from a base station, a counter check message including a first list for at least one data radio bearer (DRB), the first list including an identity of a first DRB established for the terminal and a most significant bits (MSBs) value of a first count value associated with the first DRB, wherein the MSBs value of the first count value includes a MSBs value of a first uplink count value and a MSBs value of a first downlink count value;
- and
- transmitting, to the base station as a response to the counter check message, a counter check response message including a second list,
- wherein in case that, for at least one direction of uplink or downlink, a MSBs value of a second count value of the terminal associated with the first DRB is different from the MSBs value of the first count value associated with the first DRB in the first list, the second list includes the identity of the first DRB, a second uplink count value of the terminal associated with the first DRB, and a second downlink count value of the terminal associated with the first DRB,
- wherein the second uplink count value of the terminal associated with the first DRB indicates a value of TX_NEXT−1 and the second downlink count value of the terminal associated with the first DRB indicates a value of RX_NEXT−1, and
- wherein the TX_NEXT is a count value of a next packet data convergence protocol (PDCP) service data unit (SDU) to be transmitted and the RX_NEXT is a count value of a next PDCP SDU expected to be received.
3 more elements
A method performed by a base station in a wireless communication system, the method comprising:
- transmitting, to a terminal, a counter check message including a first list for at least one data radio bearer (DRB), the first list including an identity of a first DRB established for the terminal and a most significant bits (MSBs) value of a first count value associated with the first DRB, wherein the MSBs value of the first count value includes a MSBs value of a first uplink count value and a MSBs value of a first downlink count value;
- and
- receiving, from the terminal as a response to the counter check message, a counter check response message including a second list,
- wherein in case that, for at least one direction of uplink or downlink, a MSBs value of a second count value of the terminal associated with the first DRB is different from the MSBs value of the first count value associated with the first DRB in the first list, the second list includes the identity of the first DRB, a second uplink count value of the terminal associated with the first DRB, and a second downlink count value of the terminal associated with the first DRB,
- wherein the second uplink count value of the terminal associated with the first DRB indicates a value of TX_NEXT−1 and the second downlink count value of the terminal associated with the first DRB indicates a value of RX_NEXT−1, and
- wherein the TX_NEXT is a count value of a next packet data convergence protocol (PDCP) service data unit (SDU) to be transmitted and the RX_NEXT is a count value of a next PDCP SDU expected to be received.
3 more elements
A terminal in a wireless communication system, the terminal comprising:
- a transceiver;
- and
- a controller configured to:
- receive, via the transceiver from a base station, a counter check message including a first list for at least one data radio bearer (DRB), the first list including an identity of a first DRB established for the terminal and a most significant bits (MSBs) value of a first count value associated with the first DRB, wherein the MSBs value of the first count value includes a MSBs value of a first uplink count value and a MSBs value of a first downlink count value, and
- transmit, via the transceiver to the base station as a response to the counter check message, a counter check response message including a second list,
- wherein in case that, for at least one direction of uplink or downlink, a MSBs value of a second count value of the terminal associated with the first DRB is different from the MSBs value of the first count value associated with the first DRB in the first list, the second list includes the identity of the first DRB, a second uplink count value of the terminal associated with the first DRB, and a second downlink count value of the terminal associated with the first DRB,
- wherein the second uplink count value of the terminal associated with the first DRB indicates a value of TX_NEXT−1 and the second downlink count value of the terminal associated with the first DRB indicates a value of RX_NEXT−1, and
- wherein the TX_NEXT is a count value of a next packet data convergence protocol (PDCP) service data unit (SDU) to be transmitted and the RX_NEXT is a count value of a next PDCP SDU expected to be received.
5 more elements
A base station in a wireless communication system, the base station comprising:
- a transceiver;
- and
- a controller configured to:
- transmit, via the transceiver to a terminal, a counter check message including a first list for at least one data radio bearer (DRB), the first list including an identity of a first DRB established for the terminal and a most significant bits (MSBs) value of a first count value associated with the first DRB, wherein the MSBs value of the first count value includes a MSBs value of a first uplink count value and a MSBs value of a first downlink count value, and
- receive, via the transceiver from the terminal as a response to the counter check message, a counter check response message including a second list,
- wherein in case that, for at least one direction of uplink or downlink, a MSBs value of a second count value of the terminal associated with the first DRB is different from the MSBs value of the first count value associated with the first DRB in the first list, the second list includes the identity of the first DRB, a second uplink count value of the terminal associated with the first DRB, and a second downlink count value of the terminal associated with the first DRB,
- wherein the second uplink count value of the terminal associated with the first DRB indicates a value of TX_NEXT−1 and the second downlink count value of the terminal associated with the first DRB indicates a value of RX_NEXT−1, and
- wherein the TX_NEXT is a count value of a next packet data convergence protocol (PDCP) service data unit (SDU) to be transmitted and the RX_NEXT is a count value of a next PDCP SDU expected to be received.
5 more elements
Dependencies are inferred from the claim text.