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In wireless ad hoc networks, due to the interference between concurrent transmissions, the per node capacity generally decreases with the increasing number of nodes in the network. Caching can help improve the network capacity, as it shortens the content transmission distance and reduces the communication interference. However, current researches on the capacity of wireless ad hoc networks with caching...
Interference management (IM) is essential to wireless communication networks, but interference suppression, a key component of IM, is known to degrade users' achievable spectral efficiency (SE). It is thus important to select an appropriate IM method with optimal operating parameters according to diverse network deployments, transmit power differences of various communication equipments, and dynamically...
In datacenter networks, flows can have different performance objectives. We use a tenant-objective division to denote all flows of a tenant that share the same objective. Bandwidth allocation in datacenters should support not only performance isolation among divisions but also objective-oriented scheduling among flows within the same division. This paper studies the Multi-Tenant Multi-Objective (MT-MO)...
Consider a set of point-to-point communication requests in a multi-channel multihop wireless network, each of which is associated with a traffic demand of at most one unit of transmission time, and a weight representing the utility if its demand is fully met. A subset of requests is said to be schedulable without spectral splitting if they can be scheduled within one unit of time subject to the constraint...
Data aggregation is an essential operation for the sink to obtain summary information in a Wireless Sensor Network (WSN). The problem of Minimum Latency Aggregation Schedule (MLAS) which seeks a fastest and collision-free aggregation schedule has been well studied when nodes are always awake. However, in duty-cycle WSNs, nodes can only receive data in active state. In such networks, it is of great...
Next generation (5G) mobile communication systems has a goal of ultra-high peak data rate. Ultra-Dense Network (UDN) is viewed as one of the key technologies to meet this challenge. The trend of network densification brings more complex interference. To solve this problem, a novel user-centric virtual cell design is proposed. Considering the changes of virtual cell load, we propose a load-aware virtual...
Device-to-device (D2D) communications, which enable nearby mobile devices to communicate with each other, have drawn significant research interests. To further improve the spectral efficiency of D2D communications, we integrate full-duplex (FD) into D2D communications. Since the residual self-interference (SI) will limit the performance gain introduced by the FD mode, we cannot directly determine...
With the incredible rise in WiFi devices, proper assessment for performance is essential for Quality of Experience (QoE). In the past, many access point (AP) assessment metrics have been exploited to achieve optimal AP selection. However, these conventional metrics (e.g., throughput) are insufficient to capture the full dynamics of the AP load condition. In our paper, we posit that the recent introduction...
Compressive sensing (CS) is a viable source of an innovative 5G system, what's more, it's an effective technology to deal with the data redundancy problem of massive machine-to-machine communication (MMC), since it enables the recovery of sparse and approximately sparse signals with significantly fewer samples than demanded by Nyquist-Shannon sampling theory. Interference in signal will lead a series...
In this paper, we study the power allocation and power splitting problem for simultaneous wireless information and power transfer (SWIPT) in a multi-user MISO broadcast system, in which there are two types of single-antenna users: traditional users that only receive information and modern users that receive information and energy simultaneously from a multi-antenna base station via power splitting...
The article deals with optimizing the structure of a radio-electronic system at its early stages of design on the basis of heterogeneous quality criteria and parameters determined by their alteration ranges. Drawing the complex vector of quality criteria allows to obtain the technique of multicriteria selection of the variant of a complex radio-electronic system on the basis of the set of possible...
The narrative messages of digital media are delivered to the audience through “video,” “voice,” “text,” and other materials. In this article, two issues for the three materials-“video,” “voice,” and “text”- are explored by two experimental methods respectively; two experimental data can also be mutually compared to clarify experimental results. In the first part, the strength comparison of narrative...
Affected by distance, interference, and passenger flow, escalators or staircases that are closer to the transfer station are being selected by more and more people, resulting in an unbalanced distribution of passenger flow and congestion. During rush hour, if passengers who use an escalator stand on only one side of the escalator, then passengers for different trains are prone to huddle together....
Heterogeneous networks (HetNets) are constituted by different types of base stations (eNBs), the objective of Beyond LTE does dispose more Pico eNBs to meet the traffic demand of user equipment (UE). The LTE Time Division Duplexing (TDD) system had been defined 7 uplink-downlink sub-frame configurations. For instance, two neighboring eNBs of TDD system using different uplink-downlink configuration,...
In Virtual Antenna Array (VAA) based wireless system, knowledge of users' locations can help the transmitter to achieve interference avoidance by steering the main beam towards the intended recipient. In this work, the idea has been applied to licensed shared access (LSA) based cognitive radio (CR) environment where location aware beam-forming has been implemented on spatially modulated Generalized...
This work studies the social-aware joint issue of mode selection and link allocation over mobile device-to-device (D2D) communications underlaying cellular networks. We first model this joint problem as a hedonic coalition formation game, which considers the tradeoff between the benefits in terms of achievable rate and the costs in terms of the mutual interference. Importantly, we introduce the local...
Cloud-based Radio Access Network (C-RAN) is a promising architecture for future cellular networks, in which Baseband Units (BBUs) are placed at a centralized location, with capacity-constrained fronthaul connected to multiple distributed Remote Radio Heads (RRHs) that are far away from the BBUs. The centralization of signal processing enables the flexibility for coordinated multi-point transmission...
Multiple receive and transmit antennas can be used to improve the spectral efficiency by transmitting over multiple independent streams. In addition, multiple receive antennas facilitate interference suppression through the use of interference rejection combining receivers. Rank adaptation algorithms are aimed at balancing the trade-off between increasing the spatial gain, and improving the interference...
Larger share of total energy consumed by mobile network operators (MNOs) is wasted to ensure seamless coverage. Three to six MNOs covering the same geographical area results in even more energy waste. Division of scarce resource, i.e., spectrum into small chunks also deteriorates the overall performance. With exponential growth of the traffic and insignificant marginal revenue, it is time for the...
The aim of of this work is reduction of the in-band interference in the data obtained with the channel probe device in which the Frequency Modulated Continuous Wave (FMCW) signal is used. For this purpose, the minimum norm algorithm and Wiener filter applications were used. The results of examinations, by using more echoes of the channel profile, were compared and it was determined which method is...
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