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This paper investigates the coexistence of M2M and H2H based traffic sharing the RACH of an existing cellular network. Q-learning is applied to control the RACH access of the M2M devices which enables collision free access amongst the M2M user group. Frame ALOHA for a Q-learning RACH access (FA-QL-RACH) is proposed to realise a collision free RACH access between the H2H and M2M user groups. The scheme...
Heterogeneous Network consists of wired and wireless network. In these networks, congestion control and quality of service is major issue. Due to this issues, delay and jitter are increased which decreases the performance of network. For reducing this issues there are various queue management techniques which are classified as Active Queue Management and Passive Queue Management. AQM consists of access...
This paper presents a novel approach for device-to-device transmission. The proposed method has a variety of transmission modes that can be used interchangeably according to network traffic. With this method, much better overall system performance can be achieved.
Wireless Sensor Network (WSN) is a promising technology for many applications, such as industrial, environment, and health-care application. The first requirement of WSN is energy efficiency in order to increase the network node lifetime. The second is reliability because packet drop cannot be tolerated in critical time applications. In this paper, we use NS2 simulation to evaluate and analyze the...
As the number of small cells is increased to improve mobile network capacity, disparity in the traffic load between small cells will unexpectedly widen, and then user throughput in a small cell with high traffic load will decrease. We propose a novel coverage control method that adaptively controls cell coverage for areas where users are densely located by using cell-specific beamforming with multiple...
This paper presents an efficient resource allocation approach for outband device-to-device communication within cellular networks. The proposed method aims to maximize bandwidth resource utilization and simplify system protocols, greatly optimizing throughput by minimizing the number of blocked connections and increasing the ease of operation. Using this method, bandwidth resources can be effectively...
Reduction of energy consumption is becoming a crucial aspect of wireless communications, due to the need of lowering CO2 emissions and enhancing mobile network operators OPEX. In this work we consider a heterogeneous mobile network topology with coexisting macrocellular and microcellular Base Stations (BSs). By employing two energy optimization heuristics we determine operational profiles for the...
The rapidly increasing penetration of smart phones and the associated exponential growth in the wireless data traffic result in an increasing energy consumption and, consequently, greater carbon dioxide (CO2) emissions. However, on account of operational costs and environmental worries, this increase should be taken into consideration for future cellular networks evolution. In this paper, we study...
Ultra dense indoor deployment is widely recognized as one of the predominant network configurations of the future wireless systems. Dense indoor deployments are characterized by severe interference between co-channel access points deployed usually in close proximity of one another. Thus the effectiveness and efficiency of interference management techniques is the key to the success of ultra dense...
In this paper, we consider the impact of spectrum fragmentation along the optical single-/multi-path routing transmission on the efficiency of the elastic optical networks. Using O-OFDM multicarrier transmission as a promising technique makes it possible to choose just an adequate portion of available spectrum to satisfy the requested capacity. This involves focusing on the work to reduce the fragmentation...
Asynchronous iterative water filling (AIWF), which is based on Shannon Theory, distributes resources fairly among users. Unlike Game Theory that requires users to exchange packets, AIWF does not require users to exchange packets for achieving Nash equilibrium. Conventionally, AIWF computes optimal transmit power for multiple users in Gaussian Wireless Channel. In this paper, AIWF was implemented upon...
In this article, the chief research and analysis of the network performance measurement and its research trend in the world are introduced. The network measurement technologies are classified according to consultative layer and other method. Measurement technologies of network layer are emphasized. The advantages/disadvantages of the bandwidth measurement technologies and traffic measurement technologies...
The Network-on-Chip (NoC) offers flexible and scalable communication architecture for many-core systems in the future. The routing algorithm dominates the system performance with more complicate communication and scaling. However, with the amount of processors increasing, congestion happened easily when most of the processors need to access the memory. In order to solve processor-memory accessing...
User association is one of the key techniques of the resource management in the heterogeneous cellular networks (HetNets). Interference management plays an important role on the system performance improvement in interference limited cellular networks. In this paper, we address the user association problem from the view of interference management of HetNets. Especially, we consider the co-channel interference...
This paper analyzes LTE-A Heterogeneous Network (HetNet) performance in terms of usual Quality of Service (QoS), energy efficiency and Electromagnetic Field (EMF) exposure. The main objective is to identify network deployment rules that would allow achieving optimal performance from multiple key indicators taking into account a realistic forecast of wireless data traffic demand growth. This study...
Rapid growth in data traffic necessitates a proportional growth and improvement in the capacity of cellular networks. A heterogeneous network in which macro cells are overlaid with small cells is a cost efficient and effective paradigm shift for increasing the network traffic capacity. Unplanned deployment of low power base stations with divergent power levels introduces new challenges in heterogeneous...
Device-to-device (D2D) communications as an underlay of a LTE-A (4G) network can reduce the traffic load as well as power consumption in cellular networks by way of utilizing peer-to-peer links for users in proximity of each other. This would enable other cellular users to increment their traffic, and the aggregate traffic for all users can be significantly increased without requiring additional spectrum...
Cell range extension (CRE) has been used as a method to extend the coverage of small cells and help offload macro cell users to small cells by adding a cell specific offset (CSO) to small cells in heterogeneous network deployment. However, previous literatures only considered CSO setting in sparse small cell networks (SCN) deployment where the number of small cells is relatively small. In this paper,...
A modern data center may host tens of thousands of machines, mixing with hundreds of thousands flows. Large number of flows concurrently traverse in a data center network may frequently cause traffic burst and unbalance, which may further induce congestion, packet losing, and therefore low efficiency. Generally speaking, there are three large families of scheduling algorithms to address this problem:...
As the wireless networks become more and more popular currently, how to guarantee the Quality of Service (QoS) for high bandwidth traffic is a prime concern. Compared with most existing Medium Access Control (MAC) protocols using only a single wireless channel as the transmission medium, multi-channel MAC protocols have attracted intensive attention recently because of their capabilities of significantly...
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