Apparatus, system and method for SCE
AssigneeNEC Corporation
InventorsXiaowei Zhang, Anand Raghawa Prasad
Life of this patent
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Abstract
In order for supporting separate ciphering at an MeNB (20) and an SeNB (30), the MeNB (20) derives separate first and second keys (KUPenc-M, KUPenc-S) from a third key (KeNB). The first key (KUPenc-M) is used for confidentially protecting first traffic transmitted over U-Plane between the MeNB (20) and a UE (10). The first key (KUPenc-M) may be the same as current KUPenc or a new key. The second key (KUPenc-S) is used for confidentially protecting second traffic transmitted over the U-Plane between the UE (10) and the SeNB (30). The MeNB (20) sends the second key (KUPenc-S) to the SeNB (30). The UE (10) negotiates with the MeNB (20), and derives the second key (KUPenc-S) based on a result of the negotiation.
Claims26
A method of a mobile communication system for dual connectivity, the mobile communication system including a first base station, a second base station, and a UE (User Equipment) that is connected to the first base station and the second base station for dual connectivity, the method comprising:
- negotiating, by the first base station, algorithm information with the UE, the algorithm information being received from the second base station without using a handover procedure;
- sending, by the first base station, the algorithm information to the UE;
- deriving, by the UE, a ciphering key for a user plane based on the algorithm information;
- controlling, by the UE, deletion of the ciphering key;
- and
- performing, by the UE, secure communication with the second base station using the ciphering key.
A mobile communication system for dual connectivity, the system comprising:
- a second base station;
- a first base station configured to negotiate algorithm information with the UE, the algorithm information being received from the second base station without using a handover procedure, wherein
- the first base station is configured to send the algorithm information to the UE, and
- a UE configured to:
- derive a ciphering key for a user plane based on the algorithm information,
- control deletion of the ciphering key, and
- perform secure communication with the second base station using the ciphering key.
A UE (User Equipment) that is connected to a first base station and a second base station for dual connectivity, the UE comprising:
- a memory that stores a set of instructions;
- and
- a controller configured to execute the set of instructions to:
- negotiate algorithm information with the first base station, the algorithm information being received from the second base station without using a handover procedure,
- receive the algorithm information from the first base station,
- derive a ciphering key for a user plane based on the algorithm information,
- control deletion of the ciphering key, and
- perform secure communication with the second base station using the ciphering key.
A method for a UE (User Equipment) that is connected to a first base station and a second base station for dual connectivity, the method comprising:
- negotiating algorithm information with the first base station, the algorithm information being received from the second base station without using a handover procedure;
- receiving the algorithm information from the first base station;
- deriving a ciphering key for a user plane based on the algorithm information;
- controlling deletion of the ciphering key;
- and
- performing secure communication with the second base station using the ciphering key.
A method of a first base station, the first base station and a second base station being connected to a UE (User Equipment) for dual connectivity, the method comprising:
- negotiating algorithm information with the UE, the algorithm information being received from the second base station without using a handover procedure;
- sending the algorithm information to the UE;
- deriving a ciphering key for a user plane based on the algorithm information;
- controlling deletion of the ciphering key;
- and
- performing secure communication with the second base station using the ciphering key.
A first base station, wherein the first base station and a second base station are connected to a UE (User Equipment) for dual connectivity, the first base station comprising:
- a memory that stores a set of instructions;
- and
- a controller configured to execute the set of instructions to:
- negotiate algorithm information with the UE, the algorithm information being received from the second base station without using a handover procedure,
- send the algorithm information to the UE that enables the UE to derive a ciphering key for a user plane and perform secure communication with the second base station using the ciphering key.
Dependencies are inferred from the claim text.