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To support the tremendously increasing data traffic volume in cellular networks, novel network architectures are getting evolved. Heterogeneous Network (HetNet) architecture is one such approach, where the serving nodes belonging to different Radio Access Technologies (RATs) coexist with the existing macro cell network, as an overlay. To leverage the full capacity of HetNet, efficient traffic handling...
The aim of the paper is to discuss and analyze the recent solutions based on coordinated Inter Cell Interference (ICI) techniques premeditated by researchers. The most thriving need of improved spectral density and user data throughput demands dense deployment of base stations and simultaneous resource allocation in same geographical area. This approach eases the problem of spectrum scarcity but increases...
Resource scheduling strategies are needed to achieve high data rates and to provide good quality of service to all the users in a system. The effect of interference on the mobile communication system performance is addressed in this paper. A new resource scheduling strategy called Modified Load Matrix is proposed to control the interference in turn to increase throughput in a multi-carrier based mobile...
Hardware Trends. Moore's law paved the way for doubling the transistors in the same chip area with every generation. However, with the end of Dennard's scaling, voltage and hence the power draw of transistors is no longer dropping proportionally to size. As a result, modern processors cannot use all parts of the processor simultaneously without exceeding the power limit. This manifests as an increasing...
If visions and forecasts of industry come true then we will be soon surrounded by billions of interconnected embedded devices. We will interact with them in a cyber-human symbiosis, they will not only observe us but also our environment, and they will be part of many visible and ubiquitous objects around us. The information that is collectively gathered and analyzed is supposed to help us in our daily...
This paper addresses the optimal frequency reuse for the transmission of multimedia layered source which needs unequal target error rates or spectral efficiencies in its bitstream. We first analyze the crossover point of the outage probability curves for the full and partial frequency reuses, and show that that the crossover point in signal-to-noise ratio is a strictly increasing function in spectral...
To meet quality of service requirements on the uplink of future cellular networks, we need to exploit inter-cell interference among users eligible for cooperation. Cloud Radio Access Network (C-RAN) architecture is particularly favorable to realize cooperation between users in neighboring cells, since signal detection is realized in the same processing unit. The novel technology of Software Defined...
Some Networked Control Systems (NCSs) require both wired and wireless nodes such as moving parts in automated workcells. Such an NCS is investigated in this paper as a case study. It has 2 wireless sensors, 14 wired sensors, 2 wireless actuators, 2 wired actuators and a wired supervisor. The architecture is based on Sensor-To-Actuator (S2A) model. It is shown via OMNeT++ simulations that the system...
Traffic demand in terms of total traffic volume and bit rate of mobile users is expected to increase exponentially over the coming years. As a result, current cellular networks are rapidly reaching their capacity limitations. Rescaling existing networks and protocols will not solve the problem due to a number of reasons. Firstly, the cost of upgrading backhaul networks is very high. Secondly, the...
In this work, we consider cloud RAN architecture and focus on the downlink of an antenna domain (AD) exposed to external interference from neighboring ADs. With system sum-rate as performance metric, and assuming that perfect channel state information is available at the aggregation node (AN), we implement i) a greedy user association algorithm, and ii) a greedy remote radio-head (RRH) clustering...
In this paper, we propose a transceiver architecture for full-duplex (FD) eNodeB (eNB) and FD user equipment (UE) transceiver. For FD communication,.i.e., simultaneous in-band uplink and downlink operation, same subcarriers can be allocated to UE in both uplink and downlink. Hence, contrary to traditional LTE, we propose using single-carrier frequency division multiple accesses (SC-FDMA) for downlink...
In this paper, we consider a power control scheme for co-channel deployment of femtocells in the umbrella of macrocell LTE. The severe interference in the downlink from the femtocells should be controlled to guarantee the Quality of Service (QoS) required by the macrocell users. We used clustering method for grouping femtocells according to their geographical localizations. For this scenario, we proposed...
Considering the uplink power control scheme worked effectively in compensating the path loss of intra-cell users, mitigating inter-cell interference and improving the cell coverage and system throughput in LTE-A system. An optimization physical uplink shared channel (PUSCH) closed loop power control algorithm based on power headroom report (PHR) is proposed in this paper for the existing ones with...
More cooperation or coordination is necessary for future UDN (Ultra-Dense Network) scenario of 5G network, of which ICIC (Inter-Cell Interference Coordination) is a promising and typical scheme. Cooperating cellular network may be thought as a special kind of distributed computing system, whose basic theory and toolsets could be adopted. CAP theory for distributed computing state that any networked...
The next generation (5G) mobile communication systems are targeting 1000× growth in aggregate data rate. To achieve that data rate, 5G mobile personal cell (mPC) is an emerging technology to provide ubiquitous connectivity to the users according to the traffic load and situations. In this paper, we provide a brief survey on the architecture and features for the 5G mobile personal cell in the context...
This paper instigates a new network architecture for future 5G backhaul networks which can be used to achieve higher throughput capacity and better Quality of Service in high data traffic scenarios. This network is predominantly based on dual-hop wireless links which introduce an intermediate relay point between backhaul transceivers. To make this network a high capacity density wireless system, the...
Cellular network traffic is growing at an exponential rate and it is predicted that the novel services of future 5G networks will demand even more data rate with varying quality of service (QoS). In this context, network operators and vendors are opting for network virtualization that will facilitate novel service provisioning while ensuring efficient resource utilization. We present a software defined...
Broadcast is an efficient way of delivering same content to a group of UEs. Two kinds of MBMS bearers were defined for broadcast over LTE: MBSFN for large area broadcast, SC-PTM for single cell broadcast. However, neither bearer is efficient in small area broadcast. This paper proposes two new MBMS bearer types SA-PTM and CoMP-PTM for efficient small area broadcast. SA-PTM enables synchronized SC-PTM...
With the rising of smart devices and data-intensive service, more and more people have been dedicated to the study of a novel network architecture and communication solution. As 5G revolutionizes how humans acquire, manage and engage with information, this trend will accelerate. To meet this evolution, a novel admission control strategy in LTE-A and WLAN integrated network is proposed in this paper...
To provide the paradigm shift of green cellular communications, Hyper Cellular Architecture (HCA), has been proposed, in which the common control functionalities are decoupled from the data service functionalities at base station (BS) level so that the traffic BSs can be more adaptive to the temporal and spatial traffic fluctuations. In this paper, we develop a system level simulator (SLS) for HCA...
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