To provide efficient networking services at the edge of Internet-of-Vehicles (IoV), Software-Defined Vehicular Network (SDVN) has been a promising technology to enable intelligent data exchange without giving additional duties resource constrained vehicles. Compared with conventional centralized SDVNs, hybrid SDVNs combine control and self-organized distributed routing Ad-hoc NETworks (VANETs) mitigate burden on central controller caused by frequent uplink downlink transmissions. Although...

As a promising technique for next-generation wireless networks, femtocells expand the coverage of cellular provide high data rate users, decrease transmission power user equipments, and increase spectrum efficiency. In few years, number deployed femtocell base stations (FBSs) will reach hundreds millions. This huge deployment bring lot challenges in terms interference management, resource scheduling, energy consumption. recent more attention has been paid to energy-efficient communications....

The safety driving-related content demands of vehicle users increase rapidly, especially with the development autonomous driving. It is significantly necessary to obtain safety-related transportation information an area when vehicles are drove there, whether or not they controlled by human being. However, vehicular caching can bring issues in distributed-fashion, such as high response delay and low ratio because poor traffic condition obstructions buildings. As a consequence, we adopt UAVs...

Software-Defined Vehicular Networks (SDVNs) technology has been attracting significant attention as it can make Ad Hoc Network (VANET) more efficient and intelligent. SDVN provides a flexible architecture which decouple the network management from data transmission. Compared to centralized SDVN, hybrid is even less overhead. This eliminate burden on central controller by moving regional routing tasks local controllers or vehicular nodes. In literature, different protocols have reported for...

Cooperative communications enhance the performance of wireless networks by allowing nodes to cooperate with each other achieve spatial diversity gains. To obtain cooperation gains, appropriate relay node(s) should be selected according network topology and channel state information (CSI). However, in ad hoc networks, CSI is random, dynamic. This complicates selection, turn, makes it difficult implement cooperative networks. tackle issue, this paper proposes blind (BCC) for multihop In BCC,...

Due to the increasing number of wireless devices, power consumption and energy efficiency (EE) have become important performance indicators cellular network. It is an effective method reduce by switching off some underutilized base stations (BSs). The user equipments (UEs) left sleeping BS can be serviced nearby active BSs. And through Coordinated Multi-Point technology (CoMP), it does not need increase transmit BSs ensure coverage combining sleep mode with static clustering only applied...

Introduction: Allergic rhinitis (AR) is identified as a multifactorial disease caused by the interaction of genes and surroundings, which difficult to cure. MicroRNAs were reported be engaged in AR development. Here, we aimed seek anti-inflammatory effects regulatory mechanism miR-193b-3p AR. Methods: Mucosal tissues from patients healthy volunteers collected, human nasal epithelial cells (HNECs) treated with IL-13 establish cell model The gene expression miR-193b-3p, ETS1, TLR4, GM-CSF,...

This paper presents a new model to analyze the channel access delay of 802.11 DCF. Based on this analytical model, average DCF is derived. By means simulation, correctness analysis validated, and further evaluated.

Topology control algorithm for wireless sensor networks is of great significance to save nodes' energy and prolong the lifetime network. Nowadays, there are two ways energy: hierarchical topology power control; In this paper, we propose a new method, Sleep-supported Cone-based Control method (SCTC), which integrates periodic sleep control. The simulation results show that SCTC can consumption extend network obviously.

In opportunistic networks, network topology constantly changes and instantaneous end-to-end paths are not available, nodes have narrow transmission ranges, limited storage space energy. Lately, the consideration of social characteristics provides a new vision in design routing protocols many been proposed to overcome challenging conditions networks. this paper, we propose an Interest Community Routing (ICR) algorithm which is founded on theory. Through observation that people with similar...

To be adaptive to the traffic variations in some real-time sensor applications, AC-MAC is proposed by Jin Ai et al. Based on Sensor Medium Access Control (S-MAC), introduces an duty cycle scheme within framework of S-MAC. However, frequent transceiver state switches can lead increasing consumption energy. In order solve this problem, we focus our research how reduce number switch. By combining with Dynamic Power Management, it brings a new protocol, Adaptive Coordinated MAC Protocol based...

Abstract The hidden‐terminal problem significantly degrades the performance of IEEE 802.11 DCF. Many previous works have investigated its influence on throughput CSMA‐based medium access control (MAC) protocols, especially In this paper, we introduce a new Jamming for 802.11‐based mobile ad hoc networks, which is caused by hidden terminals. An analytical model established problem. Based model, an adaptive DCF (ADCF), designed to solve jamming through adaptively adjusting minimum contention...

In wireless IEEE802.16-based relay networks, link layer handover requires more signaling interactions, and the cost processing delay will increase while using MIPv6 to networks. Aiming this problem, we propose a fast scheme apply FMIPv6 802.16j which determines cross-subnet in advance through interaction of MAC messages. Our can reduce decrease delay.

We proposed and demonstrated a 4ⅹ4 FBG-array encoder to achieve 16-branch PON smart monitoring.

Many works have been conducted on cooperation communication in wireless networks for recent years. Two main cooperative modes amplify-and-forward (AF) and decode-and-forward (DF) are proposed literatures. In this paper, we present a novel mode selection method, Maximum Throughput Cooperation Mode (MTCM). MTCM selects optimal modes, including direct transmission, AF DF to maximize the system throughput. MTCM, transmission errors taken into consideration. The simulations performed validate...

Opportunistic network is a type of challenged where an end-to-end path between the source and destination doesn't exist. The dissemination data relies on encounters nodes. Link duration time main factor in determining transmission capacity two encounter nodes opportunistic network. Besides, inter-contact plays key role forwarding algorithms has obvious effect delivery delay. In this paper, according to statistical analysis numerical methods, characteristics wireless link random waypoint...

This paper addresses the issue of packet scheduling with spatial division multiplexing (SDM) techniques multiple input output (MIMO) antenna in 3GPP Long Term Evolution (LTE) downlink. Considering restricted condition selecting SDM techniques, a novel algorithm quality service (QoS) support LTE downlink MIMO system, named QoS-DMO, is proposed. QoS-DMO extends time-frequency domain to domain, which takes into account QoS factors (e.g., data rate, delay, BER, etc.) for real time and nonreal...