  In many scenarios, low latency wireless communication assumes two-way
connection, such that the node that receives information can swiftly send
acknowledgment or other response. In this paper, we address the problem of low
latency two-way communication and address it through proposal of a base station
(BS) cooperation scheme. The scheme is based on downlink (DL) and uplink (UL)
decoupled access (DUDA). To the best of our knowledge, this is the first time
that the idea of decoupled access is used to reduce latency. We derive the
analytical expression for the average latency and verify that the latency
expression is valid with outage probability based on stochastic geometry
analysis. Both analytical and simulation results show that, with DUDA, the
latency can be reduced by approximately 30-60% compared to the traditional
coupled access.
