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Method for transmitting and receiving control information for encryption in a mobile communication system supporting multimedia broadcast/multicast service

  • US 20050157876A1
  • Filed: 01/19/2005
  • Published: 07/21/2005
  • Est. Priority Date: 01/20/2004
  • Status: Active Grant
First Claim
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1. A method for transmitting control information for encryption for protecting a Multimedia Broadcast/Multicast Service (MBMS) service by a broadcast/multicast-service center (BM-SC) in a mobile communication system including at least one mobile terminal desiring to receive the MBMS service and the BM-SC for providing the MBMS service desired by the at least one mobile terminal, the method comprising the steps of:

  • if encryption information for encrypting MBMS data for the MBMS service has not been changed, transmitting an MBMS data packet configured with control information not including the encryption information and MBMS data encrypted based on the encryption information; and

    if encryption information for encrypting MBMS data for the MBMS service has been changed, transmitting an MBMS data packet configured with control information including the encryption information and MBMS data encrypted based on the encryption information.

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