| 摘要 |
<p>Call control for originating and terminating calls in a visited circuit-switched subsystem (CS) or home multimedia subsystem (MS) as well as transferring calls between the visited CS and the home MS may be anchored at a continuity control function (CCF) in the home MS. Call signaling for the call may be passed through the CCF. When the user element is homed to the home MS and served by the visited CS, the bearer path for the call is established based on the relative proximity of the home MS and the visited CS. When a local MS is more proximate to the visited CS, the bearer path may be routed through a gateway in the local MS, instead of through the gateway in the home MS. When the home MS is sufficiently proximate to the visited CS, the bearer path is routed through the gateway in the home MS.</p> |
