Coordinated multi-point transmission has received much attention both 
in academia and wireless standards (3GPP). Coherent joint 
transmission (JT) also known as inter-cell multi-user MIMO is an 
advanced form of cooperation where multiple cells transmit data to 
multiple users based on short-term channel state to maximize the 
achievable rate region across the network. This talk will discuss 
practically achievable performance gains that take into account 
practical limitations, namely the number of cells involved in 
coordination and data transmission, backhaul traffic load, channel 
state measurement and feedback accuracy, propagation delay spread 
etc. As part of this analysis, we highlight newly developed advanced 
feedback and scheduling techniques needed to efficiently support JT 
in wide area networks.