Ciphering method in a mobile communication system supporting a multimedia broadcast/multicast service
First Claim
1. A method of transmitting data for a broadcast service from a Core Network (CN) in a mobile communication system including the CN for providing broadcast services, at least one Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) connected to the CN, and at least one User Equipment (UE) for receiving broadcast services through the UTRAN, the method comprising the steps of:
- transmitting a plurality of ciphering keys, which are generated for encoding data for the broadcast service, to the at least one UE;
generating a data frame including data encoded using a ciphering key selected from the plurality of the ciphering keys; and
transmitting a ciphering key indicator of the ciphering key to the at least one UE by incorporating the ciphering key indicator into header information of the data frame.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for ciphering MBMS (Multimedia Broadcast/Multicast Service) data in a wired/wireless communication system is provided. The MBMS service enables the same service or desired services to be provided to a number of users. In the ciphering method, a ciphering key for encoding MBMS data is previously provided to an authorized UE, and the authorized UE is informed of when MBMS data encoded using the ciphering key is to be transmitted, thereby preventing unauthorized UEs from illegally receiving the MBMS service.
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Citations
28 Claims
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1. A method of transmitting data for a broadcast service from a Core Network (CN) in a mobile communication system including the CN for providing broadcast services, at least one Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) connected to the CN, and at least one User Equipment (UE) for receiving broadcast services through the UTRAN, the method comprising the steps of:
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transmitting a plurality of ciphering keys, which are generated for encoding data for the broadcast service, to the at least one UE;
generating a data frame including data encoded using a ciphering key selected from the plurality of the ciphering keys; and
transmitting a ciphering key indicator of the ciphering key to the at least one UE by incorporating the ciphering key indicator into header information of the data frame. - View Dependent Claims (2, 3, 4, 5)
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6. A method of receiving data for a broadcast service by at least one User Equipment (UE) in a mobile communication system including a Core Network (CN) for providing broadcast services, at least one Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) connected to the CN, and the at least one UE for receiving the broadcast services through the UTRAN, the method comprising the steps of:
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requesting the broadcast service from the CN;
receiving a plurality of ciphering keys for encoding data for the broadcast service from the CN, in response to the request;
checking a ciphering key indicator included in header information of a data frame received for the broadcast service; and
decoding data received through the data frame using a ciphering key selected from the plurality of ciphering keys indicated by the ciphering key indicator. - View Dependent Claims (7, 8)
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9. A method of transmitting data for a broadcast service from a Core Network (CN) in a mobile communication system including the CN for providing broadcast services, at least one Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) connected to the CN, and at least one User Equipment (UE) for receiving the broadcast services through the UTRAN, the method comprising the steps of:
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transmitting a plurality of ciphering keys generated for encoding data for the broadcast service to the at least one UE;
transmitting a ciphering key indicator of a ciphering key selected from the plurality of ciphering keys for use in encoding the data to the at least one UE through the UTRAN by incorporating the ciphering key indicator into a message indicating that the broadcast service is to be started; and
transmitting the data for the broadcast service encoded using the ciphering key indicated by the ciphering key indicator to the at least one UE. - View Dependent Claims (10, 11, 12, 13)
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14. A method of transmitting data for a broadcast service from at least one Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) in a mobile communication system including a Core Network (CN) for providing broadcast services, the at least one UTRAN connected to the CN, and at least one User Equipment (UE) for receiving the broadcast services through the UTRAN, the method comprising the steps of:
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receiving a ciphering key indicator of a ciphering key for encoding the data through a session start message from the CN;
transmitting the ciphering key indicator to the at least one UE by incorporating the ciphering key indicator into a notification message; and
transmitting data for the broadcast service encoded using the ciphering key indicated by the ciphering key indicator to the at least one UE. - View Dependent Claims (15)
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16. A method of receiving data for a broadcast service by at least one User Equipment (UE) in a mobile communication system including a Core Network (CN) for providing broadcast services, at least one Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) connected to the CN, and the at least one UE for receiving the broadcast services through the UTRAN, the method comprising the steps of:
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requesting the broadcast service from the CN;
receiving a plurality of ciphering keys for encoding data for the broadcast service from the CN, in response to the request;
receiving a ciphering key indicator of a ciphering key for encoding the data among the plurality of ciphering keys from the UTRAN through a message indicating that the broadcast service is to be started; and
decoding data received from the CN using the ciphering key indicated by the ciphering key indicator. - View Dependent Claims (17, 18, 19)
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20. A method of transmitting data for a broadcast service from a Core Network (CN) in a mobile communication system including the CN for providing broadcast services, at least one Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) connected to the CN, and at least one User Equipment (UE) for receiving the broadcast services through the UTRAN, the method comprising the steps of:
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transmitting a plurality of ciphering keys generated for encoding data for the broadcast service to UEs that have requested the broadcast service;
establishing a Radio Access Bearer (RAB) with the UTRAN;
transmitting a ciphering key indicator of a ciphering key selected from the plurality of ciphering keys for encoding the data by incorporating the ciphering key indicator into a response message associated with the establishment of the RAB; and
transmitting the data for the broadcast service that is encoded using the ciphering key indicated by the ciphering key indicator. - View Dependent Claims (21, 22, 23)
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24. A method of transmitting data for a broadcast service from at least one Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) in a mobile communication system including a Core Network (CN) for providing broadcast services, the at least one UTRAN connected to the CN, and at least one User Equipment (UE) for receiving the broadcast services through the UTRAN, the method comprising the steps of:
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receiving a ciphering key indicator of a ciphering key for encoding the data from the CN through a response message associated with establishment of a Radio Access Bearer (RAB) with the CN;
transmitting the ciphering key indicator to the at least one UE by incorporating the ciphering key indicator into a Radio Bearer (RB) setup request message; and
transmitting the data encoded using the ciphering key indicated by the ciphering key indicator to the at least one UE. - View Dependent Claims (25)
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26. A method of receiving data for a broadcast service by at least one User Equipment (UE) in a mobile communication system including a Core Network (CN) for providing broadcast services, at least one Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) connected to the CN, and the at least one UE for receiving the broadcast services through the UTRAN, the method comprising the steps of:
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transmitting a broadcast service request message to the CN;
receiving a plurality of ciphering keys for use in encoding the data from the CN through a broadcast service response message;
receiving a ciphering key indicator of a ciphering key selected from the plurality of ciphering keys for use in encoding the data from the UTRAN through a Radio Bearer (RB) setup request message;
setting up an RB with the UTRAN; and
decoding data received through the UTRAN from the CN using the ciphering key indicated by the ciphering key indicator. - View Dependent Claims (27, 28)
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Specification