I am mulling on the current 3G network which doesn't give much room to the MPLS technology. But MPLS could be used to delivery nodeB traffic to RNC over MPLS cloud down the year. In the depicted figure, 3rd party MPLS network is used instead of single aggregator router.
By adding 3rd party MPLS network or own MPLS network; providers can get the benefits of Traffic Engineering, QOS and Fast Reroute. The PWE3 again plays a vital role to deliver the services over MPLS cloud.