Federated learning (FL) provides a new paradigm for protecting data privacy in Industrial Internet of Things (IIoT). To reduce network burden and latency brought by FL with parameter server at the cloud, hierarchical federated (HFL) mobile edge computing (MEC) servers is proposed. However, HFL suffers from bottleneck communication energy overhead before reaching satisfying model accuracy as IIoT devices dramatically increase. In this article, deep reinforcement (DRL)-based joint resource...

Caching and transcoding at multi-access edge computing (MEC) server wireless resource allocation in eNodeB interact with each other together determine the quality of experience (QoE) dynamic adaptive streaming over HTTP (DASH) clients. However, relationship among three factors has not been explored, which led to limited improvement clients' QoE. Therefore, we propose a joint optimization framework video segment caching MEC servers improve QoE DASH Based on established framework, develop an...

Wireless video offloading in mobile-edge-computing (MEC)-enabled Industrial Internet of Things imposes a risk exposing users' private data to eavesdroppers. It is difficult for existing secure schemes simultaneously guarantee security, reduce latency and energy consumption privacy-sensitive multicell scenarios where users are unwilling offload other cells. In this article, scheme based on federated (MCF) deep reinforcement learning (DRL) proposed facilitate secure, real-time, efficient MEC...

Blind/no-reference image quality assessment is performed to accurately evaluate the perceptual of a distorted without prior information from reference image. In this paper, an effective blind approach based on entropy differences in discrete cosine transform domain for natural images proposed. Information measure amount We find coefficient distribution shows pulse-shape phenomenon, which directly affects entropy. Then, Weibull model used fit distributions and images. This because...

Instead of only focusing on the hit ratio videos cached in Mobile Edge Computing (MEC) server, we propose a more refined video segment content and client statusbased MEC cache update strategy, to improve clients' Quality Experience (QoE). First, based both popularity importance, divide into three parts which can be flexibly transformed each other by combing requested times segments, transmission capability playback status together. Furthermore, present client's priority utility function...

The problem of the scheduling multiuser H.264 video transmission over wireless networks is addressed in this work. A cross-layer algorithm, including application (APP) layer, media access control (MAC) layer and physical (PHY) presented. More especially, a compressed method proposed to estimate quality contribution caused by each packet APP. objective maximising qualities satisfying delay constraint fairness among all users. algorithm compatible with emerging standards, such as IEEE 802.16...

In this paper, we focus on a comprehensive dynamic adaptive streaming over HTTP (DASH) framework, which consists of video content analysis at the server, joint optimization segment switch and resource allocation eNodeB, playback information extraction client, to improve quality experience (QoE) DASH clients long-term evolution networks. We explore unique characteristics each by establishing size-time size-distortion models based packet extracted from encoder rather than modeling entire...

Image quality assessment (IQA) is a fundamental technology for image applications that can help correct low-quality images during the capture process. The ability to expand distorted and create human visual system (HVS)-aware labels training key performing IQA tasks using deep neural networks (DNNs), highly sensitive changes in entropy. Therefore, new data expansion method based on entropy guided by saliency distortion proposed this paper. We introduce into large-scale strategy first time....

Video transmission over the backhaul link in cloud-edge collaborative networks usually suffers security risks, which is ignored most of existing studies. The characteristics that video service can flexibly adjust encoding rates and provide acceptable qualities, make requirements more possible to be satisfied but tightly coupled with by introducing restrictions on edge caching. In this paper, considering interaction between caching, we investigate quality experience (QoE)-driven cross-layer...

A cross-layer scheduling algorithm that streams pre-coded H.264 video over wireless networks to multiple users is presented. The can be used with the emerging standards such as IEEE 802.16 and HSDPA. Our focus maximizing perceptual quality after delivery constraint of limited resources delay requirements from practical point view. At application layer, relative importance each packet estimated by a index in low complexity computation, which evaluated directly compressed domain. physical...

This paper presents a novel cross-layer approach to multiuser H.264/AVC video stream transmission over wireless networks. We consider the joint optimization of three layers protocol stacks: application (APP) layer, media access control (MAC) layer and physical (PHY) layer. At APP contribution each packet perceptual quality is evaluated by distortion effect loss, which estimated Packet Relative Importance Index (PRII). MAC PHY Gilbert-Elliott (GE) model employed describe time-varying nature...

An application-driven cross-layer design of multiuser H.264/AVC video transmission over wireless networks is proposed in this paper. objective function for optimization developed based on the parameters abstracted from application layer, media access control layer and physical layer. Our to maximize perceptual quality after delivery with constraint limited resources. Simulation results show that scheme performs significantly than conventional scheduling schemes transmission.

Stringent delay constraint and the received video quality are most important issues in cloud gaming. To improve performance of gaming, a buffer status content aware packet scheduling scheme is proposed. In proposed algorithm, estimation module established to estimate client playback information based on feedback ACKs. The estimated can be used calculate urgency users' weights. By considering priority, channel states, we define novel utility function, which RB assignment jointly optimized....

As an emerging type of Internet Things (IoT), multimedia IoT (MIoT) has been widely used in the domains healthcare, smart buildings/homes, transportation and surveillance. In mobile surveillance system for vehicle tracking, multiple camera nodes capture upload videos to a cloud server track target. Due random distribution mobility nodes, wireless networks are chosen video transmission. However, tracking precision can be decreased because degradation quality caused by limited transmission...

In this paper, we propose a no-reference image quality assessment (NR-IQA) approach towards authentically distorted images, based on expanding proxy labels. order to distinguish from the human labels, define score, which is generated by using traditional NR-IQA algorithm, as “proxy labels”. “Proxy” means that objective results are obtained computer after extraction and of features, instead judging. To solve problem limited (IQA) dataset size, adopt cascading transfer-learning method. First,...

In this paper, a playback continuity driven cross-layer design is proposed for HTTP streaming in LTE systems which the stringent delay deadline of application layer translated into transmission capacity requirement at MAC eNodeB. First client buffer information such as fullness and easily obtained client. Based on information, continuous time interval that completely received segments can support calculated. To keep playback, remaining packets un-completely segment should arrive during...

In this study, the authors focus on segment characteristic analysis and joint optimisation of modulation coding scheme (MCS) selection, resource block (RB) assignment error ratio (BLER) determination adaptation to satisfy dynamic adaptive streaming over HTTP (DASH) clients wireless networks. First, define a utility function as continuous playback time that packets scheduled with allocated can support. Then, formulate MCS RB BLER into mathematical model. The relationship among above three...

The IEEE 802.11 standard provides multi-rate support for different versions. As there is no specification on the dynamic strategy to adjust rate, rate adaptation algorithms are applied according manufacturers. Therefore, it often hard interpret performance discrepancy of various devices. Moreover, ever-changing channels always challenge adaptation, especially in scenario with scarce spectrum and low SNR. a result, important sense radio environment cognitively reduce unnecessary oscillation...

The cache and transcoding of the multi-access edge computing (MEC) server wireless resource allocation in eNodeB interact determine quality experience (QoE) dynamic adaptive streaming over HTTP (DASH) clients MEC networks. However, relationship among three factors has not been explored, which led to limited improvement clients' QoE. Therefore, we propose a joint optimization framework video segment servers improve QoE DASH clients. Based on established framework, develop management mechanism...

With the development of video encoding and wireless communication technologies, DASH (Dynamic Adaptive Streaming over HTTP) services have an increasing great share all mobile services. However, we find some problems which still need to be addressed for service optimization: (1) limitation segment representations cannot keep pace with change channel states; (2) characteristics transmission been not fully utilized in current services; (3) long interruption time will yield poor QoE (Quality...

With the continuous increment of maritime applications, development marine networks for data offloading becomes necessary. However, limited network resources are very difficult to satisfy real-time demands. Besides, how effectively handle multiple compute-intensive tasks another intractable issue. Hence, in this paper, we focus on decision task by cooperation unmanned aerial vehicles (UAVs) and vessels. Specifically, first propose a cooperative framework, including demands from Internet...