Device-to-device communication offers a promising technology for the 5G network that aims to enhance data rate, reduce latency and cost, improve energy efficiency, provide other desired features. The heterogeneous (5GHN) with decoupled association strategy of downlink (DL) uplink (UL) is solution challenges faced in 4G (4GHN). research presented this paper evaluates performance 4GHN as well DL-...

When the stations in an IEEE 802.11 infrastructure Basic Service Set (BSS) employ Transmission Control Protocol (TCP) in the transport layer, this exacerbates per-flow unfair access which is a direct result of uplink/downlink bandwidth asymmetry in the BSS. We propose a novel and simple analytical model to approximately calculate the per-flow TCP congestion window limit that provides fair and e...

In a full-duplex (FD) multi-user network, the system performance is not only limited by the selfinterference but also by the co-channel interference due to the simultaneous uplink and downlink transmissions. Joint design of the uplink/downlink transmission direction of users and the power allocation is crucial for achieving high system performance in the FD multi-user network. In this paper, we...

A novel application on the recently emerging wireless Personal Communications Systems (PCS) is the multimedia communication. In this paper, we evaluate multimedia communications capability and quality of service characteristics of one of the PCS standards, Personal Access Communications System's (PACS) packet channel (PPC) using simulation modeling. The performance of PPC's slot aggregation and...

Joint optimization of nonlinear precoders and receive filters is studied for both the uplink and downlink in a cellular system. For the uplink, the base transceiver station (BTS) receiver implements successive interference cancellation, and for the downlink, the BTS station pre-compensates for the interference with Tomlinson-Harashima precoding (THP). Convergence of alternating optimization of ...

Even if massive multiple-input multiple-output (MIMO) can theoretically bring huge benefits, it incurs substantial hardware complexity and expensive costs. To address these issues while maintaining the system performance simultaneously, we develop an asymmetrical transceiver architecture for MIMO systems in this paper by releasing shackles on radio frequency (RF) chains. Specifically, first whe...

We analyze the performance of E-limited scheduling in Bluetooth piconets under bursty traffic finite buffer case. We model joint probability distributions of uplink and downlink queues using the M [x]/G/1/K model with vacations and derive buffer blocking probabilities at slaves and at the master. We also derive access delays at slave uplink buffers. Analytical results are validated through simu...

Joint power control and beamforming schemes are proposed for cellular systems where adaptive arrays are used only at base stations. In the uplink, mobile powers and receiver diversity combining vectors at base stations are calculated jointly. The mobile transmitted power is minimized, while the signal-tointerference-and-noise ratio (SINR) at each link is maintained above a threshold. A transmit...