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Anticipatory networking is a recent branch of network optimization that exploits contextual information to improve resource allocation decisions based on prediction. While some anticipatory networking concepts have been proposed in the literature, understanding of the potential real-world gains is so far very limited. Future mobile networks will likely integrate such mechanisms, and thus it is of...
Video traffic constitutes the majority of traffic in bytes that mobile and fixed line operators deliver to their customer. This type of traffic is both resource consuming and QoE sensitive. Either because of content quality or QoE, a large fraction of users often abandon viewing prematurely. These abandonment phenomena lead to a huge waste of network resources and device batteries. Several strategies...
In this work we show that random-access protocols, which are used in a range of networks (e.g. WiFi, power line communications and Internet of Things), may experience a high-throughput, extremely long (of the order of hours) transitory phase. This behaviour is not highlighted by common analysis techniques and experimental evaluations, which can lead to incorrect prediction of network performance....
Wireless channels in millimeter wave based wearable networks are particularly susceptible to environmental blockages and dynamics when there are humans/objects in motion. Such dynamics imply, not only physical layer overheads to discover and track viable transmission paths, but also MAC overheads to keep track of neighboring interferers, perform clustering and enable proper scheduling of transmissions...
Understanding traffic characteristics in cellular networks is of great significance for better network design and performance optimization. The rapid development of various social networking applications for smart devices makes it an imperative to carry out cellular data traffic analysis further into the application level. In this paper, based on a plenty of practical mobile data traffic records,...
Power integrity (PI) co-analysis of Chip-package-system (CPS) is a powerful tool to accomplish the extremely challenging goal; lower cost but better performance. However, the conventional PI analysis of CPS using chip power model (CPM) has limitations on the design evaluation and optimization of board and package. In this paper, we demonstrate the limitation first and share our experience on the development...
This paper investigates an optimal traffic rate allocation method for multi-stream aggregation over heterogeneous networks that deals with effective throughput aggregation over two or more heterogeneous links. The heterogeneity and the dynamics of radio is considered as an important factor for performance improvement by multi-stream aggregation. Therefore, in our model, the networks are represented...
Mobile operators need to deploy dense LTE-Advanced small-cell networks in the next few years to cope with the growing mobile data traffic demand. Prediction models and mobile network design tools need to radically evolve to allow a proper evaluation, and then design and optimization of cost-efficient heterogeneous networks. This paper introduces a comprehensive solution for cost and performance analysis...
Probabilistic forwarding methods have been exploited in opportunistic networks to reduce the overhead of epidemic routing. However, most existing methods make all the nodes forward messages with the same probability (i.e., equal scheme), which causes the energy unbalance of nodes. To guarantee the energy balance of nodes and prolong the network lifetime, we design a differentiated scheme, i.e., different...
Wireless heterogeneous environments are common reality today and will be even more in the future. This paper is focused on providing wireless access selection method for the future mobile terminals that will use naturally inspired algorithms for best network selection. The novel algorithm uses mobile terminal measurements from different radio access technologies within a given time window. The network...
The multiple registration scheme can reduce signaling overhead at the expense of increased session setup latency in cellular-WLAN integrated systems. In this paper, we propose a timer-based session setup procedure, which can reduce the session setup latency by looking for a user based on the estimation of the WLAN residence time. We investigate the optimization of the timer under realistic WLAN residence...
Relayed transmission is an interesting topic in cooperative diversity. Some researchers propose power allocation schemes for relayed transmission by only considering transmission through a fixed relay node. In our paper, we analyze a relayed transmission through a mobile relay node. We build up a transmission system model and determine the long term distribution characteristics of the movement of...
MANET is currently a hotspot in the wireless networks researching domain, and the routing protocol, which is as the core technology on network layers, is particularly important. Controlling node energy and increasing network lifetime are two keys to realize the transmission of efficient service for MANET. On the basis of analyzing classical MANET routing protocol, and combining with the idea of min...
In order to decrease energy consumption of node and congestion degree of network, ant-optimization is applied to improving a routing selected problem of remain-energy in ad hoc networks. This essay aims at putting forward an ant-optimization routing selected algorithm which is based on remain-energy and improving it by taking advantage of the self-adaptive characteristic of ant-optimization. The simulation...
Compare with the voice service, mobile data service is more complex. It has many types of services according to different network resources and the customers' habits. It is found that mobile data business model plays an important role in helping operator understand the customers' habits, and market promotion. It can also be used in network optimization. The old ways to get the mobile data service...
Proxy Mobile IPv6 has been developed from the concept of network-based mobility support protocol in the IETF. The recently published specification of proxy mobile IPv6 only focuses on the mobility support. Then, route optimization issues are left in the basket for further works. In this paper, we provide the performance analysis in where the recently proposed route optimization is evaluated in terms...
A number of prefix delegation-based schemes have been proposed in the literature to solve the route optimization problem in mobile networks. The route optimization solutions generate overheads and affect the performance of mobile networks. However, currently there is no tool available to aid in the selection of an appropriate scheme for a given mobility scenario. The objective of this paper is to...
Since the ability of workforce management systems to handle mobility induced challenges of mobile environments like data-communication cut-offs, reduced network bandwidth, and security concerns improved recently, the optimization efforts of mobile enterprises increasingly focus on the organizational setup of their mobile environment. This includes issues like, e.g., the dimension and staffing of regional...
This paper studies the impact of intra-die random variability on low-power digital circuit designs, specifically, circuit timing failures due to intra-die variability. We identify a new low-Vdd statistical failure mode that is strongly supply-voltage dependent and also introduce a simple yet novel method for quantifying the effects of process variability on digital timing - a delay overlapping stage...
The computing power of microprocessors has exponentially increased in the past few decades, so the support to compute intensive multimedia applications has increased too. With such improved computing power, memory subsystem deficiency becomes the major barrier to support video decoder on the Digital Signal Processor (DSP). H.264/AVC becomes the next generation of video codec for embedded systems....
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