Interference-Aware Channel Segregation Based Dynamic Channel Assignment for Wireless Networks

Abstract

Recently, we proposed an interference-aware channel segregation based dynamic channel assignment (IACS-DCA). In IACS-DCA, each base station (BS) measures the instantaneous co-channel interference (CCI) power on each available channel, computes the moving average CCI power using past CCI measurement results, and selects the channel having the lowest moving average CCI power. In this way, the CCI-minimized channel reuse pattern can be formed. In this paper, we introduce the autocorrelation function of channel reuse pattern, the fairness of channel reuse, and the minimum co-channel BS distance to quantitatively examine the channel reuse pattern formed by the IACS-DCA. It is shown that the IACS-DCA can form a CCI-minimized channel reuse pattern in a distributed manner and that it improves the signal-to-interference ratio (SIR) compared to the other channel assignment schemes.

Context-aware radio resource management below 6 GHz for enabling dynamic channel assignment in the 5G era

“…Furthermore, the superiority of the proposed algorithm compared to a fixed channel allocation (FCA) mechanism is proven. Based on this mechanism, the authors in [11] examine several metrics such as the autocorrelation function, the fairness index of channel reuse pattern and the minimum co-channel distance among the BSs. From their analysis, it can be seen that the proposed scheme forms a CCI minimized channel reuse pattern that ameliorates the signal-tointerference ratio (SIR) compared to other channel assignments schemes.…”

“…Using this technique, an efficient stable channel re-use pattern is formed and the system performance is ameliorated. Due to the inherent advantages of this method, various DCA mechanisms based on channel segregation have been proposed by the research community [9][10][11][12]. However, the majority of the DCA schemes in the literature consider that the SBSs do not differentiate between traffic requests from user equipment (UE) applications, even if the applications do not have the same priority from the user point of view.…”

Interference-aware channel segregation based dynamic channel assignment in HetNet

“…The centralized DCA may not be practical due to its prohibitively high computational complexity and back haul communication. Recently, we proposed an interference-aware channel segregation based DCA (IACS-DCA) [1,2,3], which is categorized into distributed DCA. IACS-DCA can form a channel reuse pattern with low CCI in a distributed manner [1,2,3].…”

“…Recently, we proposed an interference-aware channel segregation based DCA (IACS-DCA) [1,2,3], which is categorized into distributed DCA. IACS-DCA can form a channel reuse pattern with low CCI in a distributed manner [1,2,3]. We have shown that IACS-DCA can solve CCI problem in HetNet in a distributed manner [3].…”

Convergence analysis of interference-aware channel segregation

“…Since the CCI limits the network capacity, it is necessary to spatially reuse the channels so as to minimize the CCI in a network. Recently, we proposed IACS-DCA [1,2]. It has been shown by numerical computation that IACS-DCA forms a stable channel reuse pattern with low CCI.…”