Distributed Resource Allocation for D2D-Assisted Small Cell Networks With Heterogeneous Spectrum

Abstract

Device-to-device (D2D) communication with increased spectral efficiency and reduced communication delay has undoubtedly become a general trend in future wireless networks. However, when D2D communication is incorporated into small cell networks (SCNs) with large number of randomly overlapped small cells, the co-channel interference between small cell users (SUEs) and D2D users is an inevitable challenge, especially with the heterogeneous spectrum, i.e., licensed spectrum bands and unlicensed spectrum bands. In this paper, we study the downlink channel allocation in D2D-assisted small cell networks with heterogeneous spectrum bands. By taking the required data rate of users and the interference constraint of SUEs into account, we formulate a channel allocation problem integrating channel selection and channel sharing to maximize the network utility, which is the service satisfaction of all users. To derive the solution, we decompose the optimization problem into two games: a potential game and a coalition game. Then, a potential game-based scheme using an interference graph and a coalition scheme with D2D user transferring is proposed to solve these two games, respectively. Based on these schemes, a two-stage distributed channel allocation algorithm is proposed and can converge with low computational complexity. Moreover, the simulation results reveal that the proposed algorithm could achieve high system throughput and network utility.

Novel Relay Selection Algorithms for Machine-to-Machine Communications With Static RF Interfaces Setting

“…There are some studies that have applied matching theory to model the relay selection problem [12], [13]. Some works have modeled the relay selection problem as a maximum weighted matching problem in bipartite weighted graphs and the Hungarian algorithm has been applied in the relay selection process, as a solution [12], [14]- [20].…”

D2D Enabled Cellular Network Spectrum Allocation Scheme Based on the Cooperative Bargaining Solution

“…Reference [2] has considered the spectrum sharing problem between multiple D2D links and a cellular network with multiple operators. Liu et al study the downlink channel allocation in D2D-assisted small cell networks with heterogeneous spectrum bands [3]. The authors in [4] propose a new joint channel and power allocation algorithm to maximize the network achievable throughput, control the interference, and improve the energy efficiency of the user devices.…”

“…the fixed infrastructure even when the sources and destination devices are close to each other [1]- [3].…”

“…The spectrum resource, which is assigned to the cluster head, is shared within the corresponding cluster to maximize the overall network throughput. This spectrum sharing technology potentially opens new opportunities to ensure a higher spectrum efficiency [3], [5].…”

“…However, the research about this issue is still in its infancy, and several technical challenges keep haunting both academia and industry. Therefore, a new and novel control paradigm is expected to provide a comprehensive and effective solution [3]- [7].…”