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In this paper, we propose a non-orthogonal random access (NORA) technique for the uplink 5G networks, in which user equipments (UEs) make use of the channel inversion so that their received power at the base station (BS) can satisfy a certain threshold condition. In particular, each UE opportunistically adjusts its transmit power according to its channel gain. We also mathematically analyze the system...
In this paper, the throughput maximization problem is investigated for a block fading buffer-aided relay channel. The decode-and-forward (DF) relaying scheme is adopted, and the buffers at the relay can temporarily store the data received from the source. Considering the non-ideal circuit power, one of three transmission modes (source transmission, relay transmission, and keeping silence) is selected...
Wireless communications play a significant role in the spread of the Internet Of Things (loT). While all machines try to connect to the IoT and exchange data, wireless communications offer freedom of movement and demand of minimum infrastructure. The main obstacles that wireless communications face are the limited source of power and the short range of coverage. This paper highlights all the available...
In the near future, because of its growing popularity and improved support for increased traffic demands from subscribers, a very dense deployment of small cells is expected in LTE-Advanced heterogeneous networks (HetNets). While this kind of deployment is expected to prepare LTE-A networks to serve the subscribers better, it will further increase their energy consumption thereby raising the carbon...
This paper reviews existing reset schemes for the Muller C-element, one of the main primitives in asynchronous paradigms. Using a mathematical-based method and with the help of pass-transistor logic, an efficient implementation is developed that yields better performance. Simulations with a standard IBM 130-nm CMOS process, confirm that the proposed design achieves substantial improvement over existing...
Emerging trend in neuromorphic implementation moves towards large-scale neuron array that processes large amount of input data. It presents a grand challenge in communication between neurons due to large number of connections, or synapses, which can be in the order of millions, leading to large power consumption, processing time and many physical wires. In this work, we propose a communication protocol...
Massive multiple input multiple output (MIMO) has emerged as a promising technology, which utilizes a large number of antennas at base stations (BSs) to significantly improve the spectral efficiency in terms of bits/s/Hz while reducing the radiated signal power. A critical issue with massive MIMO is the costly circuit power consumption, which is proportional to the number of antennas. This paper develops...
LTE-M, which is an abbreviated version of LTE-MTC(Machine Type Communication) can be said to have a variety of applications, including a large number of heterogeneous interconnection of large-scale network equipment. One of the most prominent problems is that the machines may have a large amount of access requests in a short time, which can easily lead to network congestion. At present, the contention-based...
In this paper, we have discussed the application of Zigbee technology. We have shown that a single remote controlled device can control different devices with different application. The experiment performed by us shows the simulation of zigbee within the range of upto 75 meters. The remote controller uses zigbee to control devices like air-conditioner, lights, automatic curtains, garage-shutters,...
Cloud Radio Access Network (C-RAN) is a promising technology to improve user quality of service and reduce network capital and operating costs. The key concept behind C-RAN is to break down the conventional base station into a Base Band Unit (BBU) and a Remote Radio Head (RRH), and to pool BBUs from multiple sites into a single geographical point. Moreover, to achieve statistical multiplexing gain,...
Recently, the concept of heterogeneous networks (HetNets) has been proposed as an alternative solution to provide higher coverage and capacity for cellular networks. In HetNets concept, many of small base stations (SBSs) are employed in the existing cell of macro base stations (MBSs) to increase the coverage and system capacity. However, the employment of many SBSs in the existing macro cells would...
In this paper, we provide joint subcarrier assignment and power allocation schemes for quality- of-service (QoS)-constrained energy-efficiency (EE) optimization in the downlink of an orthogonal frequency division multiple access (OFDMA)-based two-tier heterogeneous cellular network (HCN). Considering underlay transmission, where spectrum- efficiency (SE) is fully exploited, the EE solution involves...
The millimeter-wave technology is emerging as an alternative to legacy 2.4/5 GHz WiFi, offering multi-Gigabit throughput. While a lot of attention has been paid recently to analyzing the performance of the 60 GHz technology and adapting it for indoor WLAN usage, the power consumption aspect has largely been neglected. Given that mobile devices are the next target for 60 GHz, any discussion about this...
Multipath TCP (MPTCP) enables transmission via multiple routes for an end-to-end connection to improve resource usage of regular TCP. Due to the increasing concern in green computing, there has been significant interest in designing energy-efficient multipath transport. For existing MPTCP congestion control algorithms, the research community still lacks a comprehensive understanding of which components...
Most large popular web applications, like Facebook and Twitter, have been relying on large amounts of in-memory storage to cache data and offer a low response time. As the main memory capacity of clusters and clouds increases, it becomes possible to keep most of the data in the main memory. This motivates the introduction of in-memory storage systems. While prior work has focused on how to exploit...
Nearly 50% of the energy overhead in today's datacenters comes from host-to-host data transfers, which largely depend on the transport layer performance. Multipath TCP (MPTCP) has recently been suggested as a promising transport protocol to improve datacenter network throughput, yet it also increases the host CPU power consumption. It remains unclear whether datacenters can indeed benefit from using...
The Internet of Things (IoT) constrained devices show the urgent need for low power data security hardware cores. This paper presents a power efficient AES Core fabricated in UMC 130 nm CMOS technology by using Faraday standard cells library. The maximum throughput of the proposed AES Core is up to 2.6 Gb/s consuming about 0.2148 mW/MHz at 1.2V. The Dynamic Voltage and Frequency Scaling (DVFS) technique...
Classical opportunistic relay selections always cause unequal power consumption among all relays. For the battery-operated relays in the cooperative networks, uneven power consumption among the relays may reduce the network lifetime and thus deteriorates the network performance. In this paper, a novel multi-relay selection scheme aiming at the increase of the network lifetime is proposed for the decode-and-forward...
Mobile services, especially video streaming, has seen a rapid usage increase in recent years. Base stations (BSs) need to employ smarter and efficient resource allocation strategies to maintain high quality of service (QoS) to users at all the times. Predictive resource allocation (PRA), is one such novel scheme, in which BSs seek to anticipate the user demands and offer service to users in advance...
In this paper, we investigate the energy efficiency (EE) and spectral efficiency (SE) tradeoff in multi-cell heterogeneous networks (HetNets). Our objective is to maximize both EE and SE of the network while satisfying the rate requirement of users. We use multi-objective optimization techniques to define the objective function. We propose a three-stage algorithm in this paper. First, we select the...
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