| 摘要 |
A system (24) and method (40, 54, 68, 77, 92) to perform load-balancing and congestion control between a primary Radio Access Technology (RAT) (27) and a secondary RAT (28). A broadcast message is sent to all User Equipments (UEs) (34) operating under the secondary RAT. If the primary RAT is congested, a congestion indicator in the broadcast message prevents the UEs from idle re-selecting or switching to the primary RAT. Even if the primary RAT is not congested, the broadcast message may still include other parameters such as one or more probability values, a group identifier for the UE groups, and a retention timer. The idle UEs in the secondary RAT that generate device-specific random values that are equal to or greater than the applicable probability threshold value(s) are allowed to reselect the primary RAT. If an idle UE fails this probability test, it may not be allowed to reselect the primary RAT again until the retention timer expires. |
