Security Key Refresh for Dual Connectivity
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Abstract
Embodiments have a master eNB with a control plane and optional data plane to user equipment and a secondary eNB with a data plane to the user equipment. The user equipment thus uses both the master eNB and the secondary eNB for data communications while receiving control information from only the master eNB. The master eNB and secondary eNB are connected with an X2 interface. When the secondary eNB desires to refresh its security key, it informs the master eNB using the X2 interface. The master eNB then uses its control plane with the user equipment to initiate a security key refresh for the secondary eNB.
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Citations
40 Claims
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1-20. -20. (canceled)
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21. A method performed by a first base station, comprising:
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receiving, from a second base station, a request to refresh a security key used by the secondary base station; sending, to a user equipment (UE) that is connected to the first base station and the second base station simultaneously through Dual Connectivity (DC), an RRC signaling to the UE to effectuate the security key refresh for the corresponding second base station; and receiving, from the UE, a message indicating that the refresh for the security key has been completed. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. An apparatus comprising:
one or more processors, configured to cause a user equipment (UE) to; receive a control message from a first base station to refresh of a security key used to communicate with a second base station, wherein the UE is connected to the first and the second base stations simultaneously through Dual Connectivity (DC); derive a new security key used by the UE to communicate with the second base station; and send a message indicating that the refresh for the security key has been completed. - View Dependent Claims (30, 31, 32, 33, 34)
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35. A user equipment (UE), comprising:
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transceiver circuitry; and one or more processors coupled to the transceiver circuitry, wherein the one or more processors are configured to cause the UE to; receive a control message from a first base station to refresh of a security key used to communicate with a second base station, wherein the UE is connected to the first and the second base stations simultaneously through Dual Connectivity (DC); derive a new security key used by the UE to communicate with the second base station; and send a message indicating that the refresh for the security key has been completed. - View Dependent Claims (36, 37, 38, 39, 40)
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Specification