Enhanced MAC protocol to support multimedia traffic in cognitive wireless mesh networks

Joint Uplink Resource Allocation Algorithm with Proportional-Fair in Heterogeneous Wireless Networks

“…Having the system model introduced, we now present the formal problem formulation. In addition, proportional fairness problem can be formulated as maximizing the sum of logarithmic user data rate [16], so that the optimization problem that we focus on can be formulated as Problem (P1). RAT .…”

“…Literature [1] summarized different research aspects of heterogeneous networks, such as network selection, handoff, multimedia applications [2] and radio resource management. Then, Wang concluded useful mathematical models for research of HWNs [3], including utility function method [4], game theory [5,6], machine learning method [7] and optimization method [8][9][10][11][12][13][14][15][16][17]. Each of these models has its own difficulties.…”

“…As we mentioned before, optimization method has taken lots of attention recently on the research in HWNs. Furthermore, there exist various works that study the problem of resource allocation by using optimization method, which can be further classified in two categories by transmission direction: downlink [8][9][10][11] and uplink [12][13][14][15][16]. In this paper, we focus on power and bandwidth allocation in uplink transmission.…”

“…The existing literature [12] proposed a joint bandwidth and power resource allocation algorithm aiming at the system capacity maximization but the bandwidth is continuous. Furthermore, literatures [13][14][15][16] investigated this subject considering more constraints. In [13], the author improved the Newton iteration method for solving the optimization problem, and literature [14] considers maximum transmission power constraint.…”

“…In [13], the author improved the Newton iteration method for solving the optimization problem, and literature [14] considers maximum transmission power constraint. Literature [15,16] further exploited the uplink radio resource allocation to provide an optimal solution with QoS support of different classes of service traffic, but the purpose of optimization problem is the system capacity as well, and the bandwidth allocated is continuous, which is not reasonable in practical environment.…”