Abstract:
Last few decades have witnessed tremendous growth in terrestrial communication.
This has happened with improved technologies at both the physical layer as well
as network layer level. In this decade, the numbers of mobile users and Internet
of Things (IoT) devices have increased exponential . Massive IoT network and
modern technologies (e.g., high speed gaming and self driving vehicles) requires
a versatile network which can provide support to all such applications. Since the
Quality of Service (QoS) requirement of each application is different from one
another, the existing Cloud Radio Access Network (CRAN) is unable to support
such diverse applications.
Coordinated Multi-Point (CoMP) transmission in CRAN requires a large
amount of data transmission and processing within a coherence time window.
Hence, CoMP transmission puts a lot of burden on the central processor and backhaul
unit. Also, establishing CoMP for the high mobility users is challenging
due to small coherence window and large beamforming overhead over mm-Wave transmission.
Here, we propose two-layer CRAN architecture with intelligent mm-Wave and
micro-Wave allocation. A dual connectivity framework has been introduced to
increase the coverage of high mobility users. Further, it is shown that the proposed
scenario reduces the load on the central processor and central back-haul. To avoid
unnecessary handoffs, a mobility management algorithm is also proposed, which
can provide seamless connectivity to the users irrespective of their velocity. Further,
through simulation results, it is shown that the proposed network outperforms the
existing CRAN framework.
