A method of supporting location services, comprising: receiving, at a target mobile terminal, at least one trigger parameter associated with a trigger event, the at least one trigger parameter defining a moving geographical target area that is associated with a location of a reference mobile terminal and that is configured to move in synch with the reference mobile terminal; receiving, at the target mobile terminal, the location of the reference mobile terminal; obtaining at least one location related measurement for the target mobile terminal; determining, at the target mobile terminal, a location of the moving geographical target area based on the location of the reference mobile terminal; determining, at the target mobile terminal, a location of the target mobile terminal relative to the moving geographical target area based at least in part on the at least on location related measurement for the target mobile terminal; and determining, at the target mobile terminal, whether the trigger event has occurred based on the at least one location related measurement for the target mobile terminal and the at least one trigger parameter, and based at least in part on the location of the target mobile terminal relative to the moving geographical target area, wherein determining whether the trigger event has occurred comprises determining if the location of the target mobile terminal matches a criterion with respect to the moving geographical target area, the criterion comprising inside the moving geographical target area, outside the moving geographical target area, entering the moving geographical target area, or leaving the moving geographical target area, or a combination thereof. receiving, at a target mobile terminal, at least one trigger parameter associated with a trigger event, the at least one trigger parameter defining a moving geographical target area that is associated with a location of a reference mobile terminal and that is configured to move in synch with the reference mobile terminal; receiving, at the target mobile terminal, the location of the reference mobile terminal; obtaining at least one location related measurement for the target mobile terminal; determining, at the target mobile terminal, a location of the moving geographical target area based on the location of the reference mobile terminal; determining, at the target mobile terminal, a location of the target mobile terminal relative to the moving geographical target area based at least in part on the at least on location related measurement for the target mobile terminal; and determining, at the target mobile terminal, whether the trigger event has occurred based on the at least one location related measurement for the target mobile terminal and the at least one trigger parameter, and based at least in part on the location of the target mobile terminal relative to the moving geographical target area, wherein determining whether the trigger event has occurred comprises determining if the location of the target mobile terminal matches a criterion with respect to the moving geographical target area, the criterion comprising inside the moving geographical target area, outside the moving geographical target area, entering the moving geographical target area, or leaving the moving geographical target area, or a combination thereof.