| 摘要 |
The method involves sending an initialization message to a new subscriber addressed according to a unique identification address and containing a subscriber identification number of a product. A group rights renewal message (MSG) for the product is prepared to a group containing the subscriber identification number, where the renewal message comprises a group header containing the number and a bitmap for allowing individual addressing of members of the group. The bitmap is compressed, and the compressed bitmap is added to the renewal message. The renewal message is sent. |
