| 摘要 |
<p>The present invention relates to a method of managing access rights by a multimedia unit. With known systems, when the partial validity duration reaches the deadline, the management system must send a renewal message several times to ensure receipt, which is non-optimal use of bandwidth. The present method involves verifying if a multimedia unit (STB) is authorized to renew an access unit, by utilizing a control centre (CG). An access unit renewal message is sent to the multimedia unit, if the multimedia unit is authorized. An inhibition message is sent for preventing the multimedia unit from sending a new access unit renewal message, upon determining that the multimedia unit is not authorized to renew the access unit.</p> |
