Promoting femtocell cooperation through incentive for improving data rate of indoor users in underlay heterogeneous network

Abstract

This study proposes an incentive-based femtocell cooperation scheme for indoor macrocell users (MUs) in an underlay two-tier heterogeneous network which helps the indoor MUs to achieve higher data rate through time sharing access from the femtocell. Due to underlay spectrum sharing nature of the femtocell, the network suffers from severe cross-tier interference. To manage this cross-tier interference, a price-based power control scheme is also proposed for the femtocell access point (FAP) whereby the macrocell base station (MBS) controls the transmit power of the FAP by pricing their resulted cross-tier interference power level subject to a maximum tolerable interference limit. A Stackelberg game has been formulated and analysed for joint pricing-based power control and incentive-based cooperation game. Numerical results show the performance of the proposed scheme in terms of achievable rate of indoor users and utilities of both the MBS and the FAP for different locations of the femtocells.

Improving data rate of indoor users through time sharing access of femtocell service in underlay heterogeneous network

“…For numerical simulation, we consider a test scenario exactly similar to that of [2] for the purpose of comparison between the two schemes. All the simulation parameters are also taken from [2]. We plot the optimal values of , achievable rates of indoor MU and also revenues earned by the MBS for different distances of the FAP from MBS while keeping the mutual distances of the FU, indoor MU and interfering MU fixed for the proposed scheme and incentive‐based scheme.…”

“…Results and discussions: For numerical simulation, we consider a test scenario exactly similar to that of [2] for the purpose of comparison between the two schemes. All the simulation parameters are also taken from [2].…”

“…In the hybrid access control policy [1] for femtocells, if any macrocell user (MU) enters a femtocell coverage zone at indoors, it does not generally connect to the femtocell unless a cooperation policy between the macrocell and femtocell has been defined. In [2], an incentive‐based cooperation policy was proposed where the macrocell base station (MBS) encourages the femtocell access point (FAP) to provide downlink access to the indoor MU by providing incentive. Various other cooperation policies can be found in references of [2].…”

“…System model and proposed scheme: The system model for this proposed scheme consists of only a single femtocell which in downlink mode serves a FU through a concurrently shared sub-channel from the uplink band of the macrocell as in underlay spectrum sharing. The system model is exactly similar to [2]. Therefore, for the system model diagram, descriptions of various channel gain symbols and other useful notations, we refer to [2] due to lack of space in this Letter.…”

Robust resource allocation for heterogeneous wireless network: a worst‐case optimisation

“…Usually, microcell networks, distributed in the hotspot area of macrocell networks, have the radius range from 30 to 300 m, so that cellular networks with different kinds of cell sizes are overlapped with each other [4]. Base stations (BSs) with different transmission power in cellular networks are adjacent to each other, so that the whole communication network presents a multi‐layer and heterogeneous network (HetNet) structure.…”