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Vehicle-to-everything (V2X) communications, enabled by cellular device-to-device (D2D) links, have recently drawn much attention due to its potential to improve traffic safety, efficiency, and comfort. In this context, however, intracell interference combined with demanding latency and reliability requirements of safety vehicular users (V-UEs) are challenging issues. In this paper, we study a resource...
In this paper, a resource allocation model is constructed, based on the Double Multi-Attribute Auction (DMAA) mechanism. Firstly, multiple attributes are taken into account to form the Quality Index (QI), which is used to comprehensively evaluate consumers' and providers' performance in the transactions. Secondly, a Support Vector Machine (SVM) algorithm is adopted to predict the price. Finally, the...
This paper investigates the problem of resource and power allocation in device-to-device (D2D) underlays given a specific secrecy rate constraint. The objective is to optimize the pairing of D2D links with cellular user equipment (CUE) uplink channel resources, and to allocate their respective powers to combat against eavesdroppers for secrecy rate improvement. The proposed method first determines...
In order to reduce the energy consumption, we propose a novel Macro Base Station (MBS) sleep scheme based on the density of Pico Base Station (PBS) including three sleep approaches for current heterogeneous networks (het-net). Our scheme consists of two parts. In the first part, by setting thresholds for PBS density according to the total coverage of PBSs in a macro-coverage, we divide the network...
A wireless heterogeneous sensor networks (WHSNs) is a kind of wireless sensor networks (WSNs), each sensor may have different sensing units. Sensing nodes can simultaneously monitor different attributes, such as various temperature, brightness, humidity, and so on. MUQC use the changes in number of sensing units and sensing units to adjust the probability of on mode and off mode. After several rounds,...
To cope with the too much energy consumption of base station (BS), this paper firstly gives a green heterogeneous network architecture, in which some BSs could be switched off or set as sleep mode when its local traffic is low, while the resident users rely on the mobile relay network composed by intelligent mobile nodes to connect to one of its neighboring BSs. Moreover, in order to achieve better...
Online store brand recognition refers the global senses of shop functional attributes and affective properties formed by the consumers according to their own psychological characteristics, namely overall feeling to the online store brand image.In order to construct the dimensions of brand-recognition of on-line store and drawn up corresponding questionnaires as well, This paper formed prediction questionnaire...
The cognitive routing can collect the network information, analyze the information and make the routing decision. A multi-strategy cognitive routing will choose the routing strategy adaptively by different network environment. In this paper, a cognitive multi-strategy routing with QoS constraint and load balance is proposed. If the payload of network is light, parameters of QoS performance, such as...
Realization of end-to-end Quality of Service (QoS) provisioning in a scheme plays a very important role in improving stability and quality of communication. Although simple data switching is possible between heterogeneous networks supporting different QoS signalling, end-to-end QoS provisioning can not be completed due to different rules in executing resource reservation. In this paper, a dual-stack...
Scheduling algorithms are very important in WiMAX allowing an efficient radio resources distribution to the uplink and downlink connections. However, the IEEE 802.16 standard does not specify which scheduling algorithm(s) should be used. In this paper, we propose a review of scheduling algorithms proposed for WiMAX / IEEE 802.16 system. We also propose some considerations for the spectrum efficiency...
Wireless Sensor Networks (WSN) get more and more attentions in recent years. Most of WSN research focus on routing and data aggregation, but only a few papers discuss the QoS area. In an earlier work, an approach based on the Gur game was introduced. The Gur game-based scheme does not consider the coverage of active sensors. If the active sensors are distributed too densely or too sparsely, this may...
An adaptive resource allocation scheme for QoS oriented OFDMA system, which schedules two different utility functions for the Real-time/Non Real-time traffic simultaneously, is proposed in this paper. Instead of partial consideration of uniform kinds of QoS, we introduce an updating ratio factor to schedule users of heterogeneous traffic. Due to the complex optimization objective, the general convex...
Call admission control is an essential approach for traffic control and QoS provisioning. Compared with the single network, it is quite complicate for multi-service heterogeneous wireless networks. In this paper, a hierarchical joint call admission control HJCAC is proposed. The framework of the scheme, new introduced messages format and service access procedure is also designed in this paper. Simulation...
It is often the case that safety-critical systems have to be reconfigured during operation because of issues such as changes in the systems operating environment or the failure of software or hardware components. The reconfiguration ability of system can recover operation in timely, also enhance the survivability of system by replacing current disabled configuration with a new one. In view of the...
Ad hoc network does not depend on any fixed infrastructure, and its main features are no central structure and the rapid dynamic change. This paper presents the enhanced maximum stability weighted clustering algorithm (EMSWCA), based on the WCA and the MSWCA algorithm. The EMSWCA explicitly identifies the maximum load parameters of clusters, accelerates the convergence speed, and provide a certain...
Grid workflow is an important technique to implement cooperation of services in a grid. QoS allows for the selection and execution of grid workflow to better fulfil customer expectations. Before the execution of a workflow, users need to provide the QoS requirements, and then the workflow service evaluates the requirements and returns the evaluation results. This paper proposes a QoS negotiation protocol...
In this paper, a Hopfield neural network (HNN)-based method is proposed to solve the QoS routing problem with inaccurate information, i.e. the OP-MP (optimally partitioned most probable path) problem. The general principles involved in this kind of routing problem and the design of the proposed HNN are presented, followed by a computer simulation. The demonstration shows that such an HNN-based method...
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