Molecular communication is an emerging communication paradigm for bio-nanomachines (e.g., artificial cells, genetically engineered cells) to perform coordinated actions in an aqueous environment. This interdisciplinary research is considerably different from the traditional communication system, since it utilizes not electromagnetic waves but biological molecules both as carriers and as information. It originally mimics the existing communication mechanisms in biology, e.g., communications among micro-organisms.
Global mobile data traffic continues to experience an explosive growth, with projections of 18x growth between 2011 and 2016. This impacts the network at all stages of the delivery chain, from sources to consumers. A vital final link in this chain for mobile data is the wireless LAN, which has evolved from the first widely deployed 802.11b networks supporting 11Mbps in 1999 to the recently available 802.11ac devices (2013) supporting throughputs above 1Gbps. This paper describes in details primary improvements used to achieve the increase in throughput, such as channel bonding and multiuser MIMO.IEEE Communications Magazine
This paper validates a reference non-line-of-sight (NLOS) pathloss model named VirtualSource11p for vehicle-to-vehicle (V2V) communications in urban street intersections. Such validation is conducted with the help of independent channel measurement data. Vehicles that are approaching a street intersection often have NLOS communication from the vehicles in the other street, because buildings at the corner block the line-of-sight communication path. In such situations, the scattering of radio waves (i.e., reflection, diffraction, and refraction) from objects in the surroundings implicitly enable the signal reception. It is observed that the geometry of the street intersections, i.e., street width and alignment, structure of buildings, and antenna height, have great impacts on the received signal power.International Conference on ITS Telecommunications
This paper proposes a novel architecture of data center networks, which adds wireless network cards to all servers and routers. Wireless communication enables the logically centralized control over the physically distributed states in the emerging software defined networks (SDN) paradigm, by sharing control information among servers and routers. This paper is the first to explore traffic redundancy elimination (TRE) mechanisms in large-scale data center networks (DCN). A large fraction of the traffic in DCN is redundant. TRE mechanisms increase network capacity by removing strings that have appeared in earlier packets and attaching them several hops downstream at routers where this string has been previously cached. Finding an optimal caching task assignment for TRE in DCN is proven to be NP-hard.IEEE Journal of Selected Areas in Communications
Device-to-device (D2D) communication has been well recognized as a promising paradigm to improve user experiences in cellular networks by reusing licensed spectrum. However, design, analysis, and optimization of D2D communication require multidisciplinary knowledge, including wireless communication, signal processing, and economic theory. In this paper, the authors developed an innovative resource allocation scheme, to multiplex the communications of multiple D2D users with cellular users. The key idea is to use combinatorial auction theory for allocating radio resources when D2D communication works as an underlay, and investigate the interference relationship between D2D and cellular users.IEEE Journal on Selected Areas in Communications
While the emerging mobile cloud technology provides a promising solution for mining big multimedia data in wireless networks, there exist several limitations imposed by the energy-constrained mobile devices, irresponsive delivery of mined stream, and huge drain on server-side resources. This paper proposes a mobile cloud-based stream mining system that addresses three key metrics: energy consumption of the cloud, accuracy of mining result and responsiveness, as well as the energy consumption of battery-powered mobile users.IEEE Transactions on Multimedia
This paper envisions a future cellular network where base stations (BSs) are powered by multiple types of energy sources, such as those from the traditional power grid, solar energy, and wind energy. This means that the BSs can reduce their carbon footprints if they have enough green energy stored in their batteries. Otherwise, BSs can be switched to on-grid energy to serve mobile users. Such reduction of the BSs’ power consumption is crucial to green cellular networks, since BSs consume more than 50% of the total energy of cellular networks. In order to reduce the on-grid energy consumption of cellular networks during the peak traffic hours, this work studied the green energy optimization (GEO) problem to balance the energy consumption among BSs. To solve the problem, this paper decomposed the GEO problem into two sub-problems, in the time dimension and the spatial dimension, respectively, the multi-stage energy allocation (MEA) problem and the multi-BSs energy balancing (MEB) problem based on the characteristics of green energy generation and mobile traffic.IEEE Transactions on Wireless Communications