MACD e-ICIC: a dynamic LTE interference coordination method based on trend and trading know-how
- PDF / 1,947,962 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 13 Downloads / 153 Views
MACD e-ICIC: a dynamic LTE interference coordination method based on trend and trading know-how Yuri V. L. de Melo1 · Vicente A. de Sousa Jr.2
· Tarcisio F. Maciel1
Accepted: 22 September 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Mobile communications are preparing for the incredible changes from 4th Generation (4G) to 5th Generation (5G) in the coming years. In this new generation, co-channel interference is one of the critical challenges to be tackled due to network densification by providing high data rates through several macro and small cells working together, configuring the so-called Heterogeneous Network (HetNet). The umbrella of 3GPP system (including LTE and its evolution towards 5G) provides the Almost Blank Subframe (ABS) as a scheme of the Enhanced Inter-Cell Interference Coordination (e-ICIC) framework to mitigate interference among macro and small cells. The ABS mutes some of the macro cell transmissions in selected subframes to decrease interference to small cells, thus orthogonalizing macro and small cell transmissions in time-domain. In this paper, we use a moving average convergence/divergence technique based on trading know-how to propose a real time ABS e-ICIC algorithm. Our proof-of-concept simulation results show relative capacity gains of 112% compared to the case without ABS. Keywords LTE · ABS · e-ICIC · Trend · Trading · MAC · MACD
1 Introduction The triple play service (broadband Internet, TV, and telephone) for mobile phones, coupled with the popularization of powerful smartphones, has contributed to the observed exponential increase in data capacity demand to cellular systems. Broadband Internet itself is challenging for VoD (Video on Demand) and VoIP (Voice over IP), which according to 3rd Generation Partnership Project (3GPP) can be dealt with a Heterogeneous Network (HetNet) [1], especially due to its better tradeoff among data rate, coverage and latency than that provided by a single network. However, the employment of small cells, overlapping the macro cell bandwidth, leads to increased co-channel interference, mainly at the cell edge. We have a particular situation when the small cell is targeting areas with
B
Vicente A. de Sousa Jr. [email protected] Yuri V. L. de Melo [email protected] Tarcisio F. Maciel [email protected]
1
Federal University of Ceará, Fortaleza, CE, Brazil
2
Federal University of Rio Grande do Norte, Natal, RN, Brazil
a high concentration of mobile subscribers (a hot spot area). The data demand for such areas is seasonal, presenting varying offered traffic over time. This dynamic interference profile can be managed by the time-domain Enhanced Inter-Cell Interference Coordination (e-ICIC) scheme with the use of Almost Blank Subframe (ABS), where the macro Base Station (BS) stops data transmission in some subframes in order to protect the User Equipments (UEs) at the borders of small cells. During ABS subframes, the macro BS transmits only control signaling, such as Common Reference Signal (CRS
Data Loading...
