5. The mobile face-to-face interaction monitoring device according to claim 1 , further comprising a monitoring planner for controlling monitoring of the turn based on information of the conversation group, wherein the monitoring planner comprises: a source selector for determining a quantity of the mobile devices in the conversation group and selecting one or more source mobile devices for collaborative turn monitoring among the mobile devices in the conversation group, and an execution planner for controlling the monitoring in the turn detector.
5. The mobile face-to-face interaction monitoring device according to claim 1 , further comprising a monitoring planner for controlling monitoring of the turn based on information of the conversation group, wherein the monitoring planner comprises: a source selector for determining a quantity of the mobile devices in the conversation group and selecting one or more source mobile devices for collaborative turn monitoring among the mobile devices in the conversation group, and an execution planner for controlling the monitoring in the turn detector. 6. The mobile face-to-face interaction monitoring device according to claim 5 , wherein the monitoring planner further comprises a sync manager for synchronizing the mobile devices in the conversation group.