  While the legacy cyclic prefix orthogonal frequency division multiple access
is retained as the preferred multiple access scheme for 5G enhanced mobile
broadband the research is now focussed on the multiple access schemes for
massive machine type communication (mMTC) and ultra-reliable low latency
communication .Though orthogonal multiple access schemes provide simple
reception, they limit number of simultaneous user equipment as against the
primary requirement of mMTC. On the other hand, the various non-orthogonal
multiple access schemes which have been proposed so far as the likely solution,
need complex successive interference cancellation receivers. So a simplified
scheme named constellation shared multiple access is proposed here which
substantially increases the number of simultaneous users to be served within a
single resource block (RB) in LTE or 5G New Radio, thus aiding the massive
connectivity requirement of mMTC. This is achieved by differentiating among the
users in constellation domain. Moreover, the simple architecture compatible
with 5G eMBB makes it a strong contender multiple access contender for 5G mMTC.
