| 摘要 |
The present invention relates to methods and arrangements for access control in a multicast system when data is distributed from a source VS on a common link L 3 to at least two users U 1 -U 12 via a node BN 21 that comprises a request arbiter ARB 21 . The arbiter is arranged to distribute the data from source to the users. The method comprises the following steps: -A weight is assigned to each user U 1 -U 12 associated with the node BN 21 . The weights determine each user's allowed bandwidth i.e. bandwidth allowed to use out of available bandwidth on the common link L 3 . -A request to join a multicast session S<SUB>81 </SUB>is received to the node BN 21 from a user U 1 . -Actual bandwidth usage by the user U 1 calculated as the sum of the user's bandwidth part of each used session on the common link L 3 including the new request, is compared in the node BN 21 with the users U 1 allowed bandwidth. -The request denied if the available bandwidth is lower than the actual bandwidth.
|
