Transmission Scheme for D2D Multicast Communication in LTE-Advanced Networks
Abstract
We consider D2D multicast communication which
reuses cellular uplink frequency resources in LTE-Advanced
networks. In this case, the cellular uplink signal will interfere to
the D2D link communication. The data transmission rate of D2D
multicast communication is determined by the user having the
worst signal-to-interference plus noise (SINR) condition.
Conventional schemes assume that the D2D transmitter employs
SC-FDMA transmission scheme because it is already used for
cellular uplink transmission in LTE-Advanced system. However,
if SC-FDMA is employed in D2D transmitter, it is very difficult
to reduce the interference from the cellular user in D2D receiver
and D2D multicast transmission is allowed only when the
interference from the cellular user is very small in all users
within the D2D multicast group. In this paper, we propose to
employ MC-CDMA transmission scheme in D2D multicast
transmitter. The interference signal from the cellular user can be
eliminated by applying the interference cancellation schemes in
the D2D multicast receivers and D2D communication becomes
possible even in the high interference cases. Through simulation,
we show that the proposed scheme has better SINR performance
than the conventional scheme.
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