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With the ever increasing data and computational demands from mobile users, heterogenous wireless networks (HetNets) and mobile cloud computing (MCC) have been advocated as a promising solution to meet these demands. Insufficient bandwidth is one of the most important challenges being faced by a successful implementation of the MCC technology due to heavy data traffic. The MCC implementation on HetNet...
In this paper, we present the case for cellular base stations enabled with renewable energy sources (RES) to be interconnected in a mini-smart grid (SG). Such an arrangement is envisaged to power the base stations (BSs) with clean sustainable energy as well as provide power to the local community. The technologies associated with RES as well as SGs have matured enough to be integrated with cellular...
In machine-type communication (MTC) over LTE cellular network, resource allocation problem becomes a challenging issue as MTC devices compete with LTE users for the same radio resources. Compared to the LTE users, MTC devices generate more uplink traffic requests and signalling which results in congestion arises in uplink transmission when a large number of devices send connection requests simultaneously...
5G systems are expected to be key enablers for provisioning advanced applications and services for Internet of Things (IoT). Therefore, beyond supporting the conventional cellular phones, 5G systems are expected to support several heterogeneous devices and sensors, which may have a diverse range of requirements. In this paper, first, we identify several possible scenarios of IoT and their requirements...
Energy-efficient resource allocation for cognitive radios operating in television systems (TV white spaces) presents a unique challenge compared with other cognitive radios because the interference constraint is for the whole frequency band rather than per carrier. This paper presents a subchannel and power allocation protocol that maximizes the energy efficiency (EE) of transmissions from a cognitive...
Cellular based M2M systems generate massive number of access requests which create congestion in the cellular network. The contention-based random access procedures are designed for cellular networks which cannot accommodate a large number of M2M traffic. In this paper, a contention-based slotted Aloha random access procedure for M2M network is first analyzed using different performance metrics. The...
Power consumption analysis is the first step in the process of dimensioning the cell size for any mobile network. Therefore, improving power utilization emerges as one of the major challenges to the 3rd Generation Partner- ship Project (3GPP) Long-Term Evolution (LTE) Release 12 coordinated multipoint (CoMP) transmission and reception scheme. This paper proposes new models for heterogeneous deployment...
The downlink subcarrier allocation in a cooperative multiuser system with an amplify-and-forward relaying is studied for OFDM systems. We use the cooperation coefficient (Γ) from the literature as a basis for subcarrier allocation. Mean of the coefficient is first derived for Rayleigh faded channel. Then, a well known subcarrier allocation algorithm namely Max-Min is modified to make use of Γ. In...
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