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The femtocell deployment in 3GPP/LTE sets new challenges to interference mitigation techniques and Radio Resource Management (RRM). Traditional schemes are mainly designed for classical cellular networks while the ad hoc nature of femtocells notably limits the complexity of possible algorithms. Thus, efficient RRM schemes are essential for limiting the interference impact on end-user performance....
Radio resource management (RRM) is widely regarded as a critical component in improving spectral efficiency of beyond third generation (3G) cellular air interfaces. Much of the published work in Orthogonal Frequency Division Multiplexing (OFDM) RRM focuses on exploiting multi-user, multi-channel and multi-application diversity. In this paper, we propose a Quality of Service (QoS)-aware bit scheduling...
In this paper, we study and analyze the performance of advanced OFDM packet scheduling techniques with given QoS requirements under the 3GPP UTRAN Long Term Evolution (LTE) framework. Stemming from our previous studies in scheduling algorithm developments, we show that the main radio resource management (RRM) performance measures such as fairness, throughput and coverage are efficiently controlled...
Next generation mobile radio networks of IMT Advanced systems family will offer ubiquitous broadband high area coverage, at up to 1 GBit/s in cities and 100 MBit/s in rural areas and QoS support in terms of throughput and low delay. Candidate technologies like 3GPP-LTE, WiMAX, as well as the WINNER system design are based on OFDMA transmission for flexible radio resource allocation, scalable and adaptable...
In this paper the possibility of device-to-device (D2D) communications as an underlay of an LTE-A network is introduced. The D2D communication enables new service opportunities and reduces the eNB load for short range data intensive peer-to-peer communication. The cellular network may establish a new type of radio bearer dedicated for D2D communications and stay in control of the session setup and...
In this paper, we provide a framework for enhancing radio resource management (RRM) in 3G long term evolution (LTE) systems with cognitive features. By exploiting the capabilities of orthogonal frequency division multiplexing (OFDM) LTE access technology, network segments are capable of properly adapting to the environment conditions by applying RRM algorithms for optimized sub-carriers' assignment,...
In this paper we investigate resource allocation for an uplink DFT-precoded OFDMA system, a subset of which is agreed on to be used in the Third Generation Partnership Project-Long Term Evolution (3GPP-LTE) uplink. Different from the well studied OFDMA resource allocation problem, each user equipment (UE) is assigned a set of sub-carriers, within which individual power allocation per sub-carrier basis...
OFDMA system with frequency re-use of 1 suffers from poor cell edge performance because of serious inter-cell interference in both downlink and uplink. In this paper, a novel method called scheduling based controllable interference coordination (SBCIC) which adapts to different system load distribution and its variation is proposed to mitigate inter-cell interference and hence increases SIR at cell...
In this paper, we propose a hybrid multiple-access scheme which combines IDMA (interleave division multiple access) and OFDMA (orthogonal frequency division multiple access), named OFDMA-IDMA. The advantages of this scheme are analyzed and the probable application scenarios are discussed. A scheduling method for uplink based on convergence analysis techniques is also proposed to group users to share...
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