Speaker: Anqi He
Title: Comparison of CoMP and MISO for Energy Efficiency in HetNets
Abstract:
Energy efficiency has become one of the key
performance indicators for 5G wireless networks. Coordinated
multipoint (CoMP) transmission/reception and multiinput
single-output (MISO) are two technologies which can
achieve higher energy efficiency in heterogeneous networks
(HetNets) compared to conventional single-input single-out
(SISO) systems. CoMP improves energy efficiency by joint
transmission among cooperative base stations (BSs) while MISO
achieves this by maximal ratio transmission (MRT) beamforming.
In this paper, we use a stochastic geometry approach to
analyze and compare the energy efficiency of CoMP and MISO
in HetNets. First we derive an exact theoretical expression for
the network coverage probability of MISO which is validated
by Monte Carlo simulations. Then energy efficiency of a twotier
HetNet with CoMP and MISO is analyzed respectively and
compared. Numerical results show that the energy efficiency of
MISO rises with increasing number of antennas. The achievable
energy efficiency of both CoMP and MISO is related closely to
the density ratio between Pico BS (PBS) and Macro BS (MBS).
When the density ratio is lower than a critical value, MISO
is more energy efficient than CoMP; while CoMP outperforms
MISO when the density ratio goes beyond the critical value.
The exact critical value varies with the number of the antennas
used in MISO.
Date: 19th Nov, 2014.
Time: 14.00-13.00 hrs
Venue: Eng209.