2 research outputs found
A Novel Beamformed Control Channel Design for LTE with Full Dimension-MIMO
The Full Dimension-MIMO (FD-MIMO) technology is capable of achieving huge
improvements in network throughput with simultaneous connectivity of a large
number of mobile wireless devices, unmanned aerial vehicles, and the Internet
of Things (IoT). In FD-MIMO, with a large number of antennae at the base
station and the ability to perform beamforming, the capacity of the physical
downlink shared channel (PDSCH) has increased a lot. However, the current
specifications of the 3rd Generation Partnership Project (3GPP) does not allow
the base station to perform beamforming techniques for the physical downlink
control channel (PDCCH), and hence, PDCCH has neither the capacity nor the
coverage of PDSCH. Therefore, PDCCH capacity will still limit the performance
of a network as it dictates the number of users that can be scheduled at a
given time instant. In Release 11, 3GPP introduced enhanced PDCCH (EPDCCH) to
increase the PDCCH capacity at the cost of sacrificing the PDSCH resources. The
problem of enhancing the PDCCH capacity within the available control channel
resources has not been addressed yet in the literature. Hence, in this paper,
we propose a novel beamformed PDCCH (BF-PDCCH) design which is aligned to the
3GPP specifications and requires simple software changes at the base station.
We rely on the sounding reference signals transmitted in the uplink to decide
the best beam for a user and ingeniously schedule the users in PDCCH. We
perform system level simulations to evaluate the performance of the proposed
design and show that the proposed BF-PDCCH achieves larger network throughput
when compared with the current state of art algorithms, PDCCH and EPDCCH
schemes
A Novel Beamformed Control Channel Design for LTE with Full Dimension-MIMO
The Full Dimension-MIMO (FD-MIMO) technology
is capable of achieving huge improvements in network throughput with simultaneous connectivity of a large number of mobile
wireless devices, unmanned aerial vehicles, and the Internet of
Things (IoT). In FD-MIMO, with a large number of antennae
at the base station and the ability to perform beamforming,
the capacity of the physical downlink shared channel (PDSCH)
has increased a lot. However, the current specifications of the
3
rd Generation Partnership Project (3GPP) does not allow the
base station to perform beamforming techniques for the physical
downlink control channel (PDCCH), and hence, PDCCH has
neither the capacity nor the coverage of PDSCH. Therefore,
PDCCH capacity will still limit the performance of a network as
it dictates the number of users that can be scheduled at a given
time instant. In Release 11, 3GPP introduced enhanced PDCCH
(EPDCCH) to increase the PDCCH capacity at the cost of
sacrificing the PDSCH resources. The problem of enhancing the
PDCCH capacity within the available control channel resources
has not been addressed yet in the literature. Hence, in this paper,
we propose a novel beamformed PDCCH (BF-PDCCH) design
which is aligned to the 3GPP specifications and requires simple
software changes at the base station. We rely on the sounding
reference signals transmitted in the uplink to decide the best
beam for a user and ingeniously schedule the users in PDCCH.
We perform system level simulations to evaluate the performance
of the proposed design and show that the proposed BF-PDCCH
achieves larger network throughput when compared with th