Community Research and Development Information Service - CORDIS

Periodic Report Summary 1 - QUICK (Quality-of-Experience Improvement for Mobile Multimedia across Heterogeneous Wireless Networks)

Motivation and objectives:

With the rapid innovation in sophisticated wireless communication technologies, the past years have witnessed a dramatic growth of content-rich and resource-hungry mobile multimedia applications that demand high Quality-of-Experience (QoE). The overall objective of this project is to bring together a highly qualified group of researchers from both European countries and China to explore the strategies for QoE improvement of mobile multimedia across heterogeneous wireless networks. Built upon the solid ground of cooperation and knowledge transfer between the partners, this project will be unique in its advocate of the seamless integration of network-aware adaptive multimedia processing at the application layer and multimedia-driven heterogeneous wireless networking at the transmission layer. The optimal interaction through a cross-layer design plays an important role in efficient utilization of scarce wireless communication resources to deliver mobile multimedia and improve the users perceived QoE with the aim of creating a new era where multimedia service providers, network operators and end users all benefit.

The techniques to be developed will fill important gaps in the fundamental understanding of QoE-improved wireless multimedia communications and provide the theoretical underpinning for system design and algorithm implementation. By strengthening the mobility of European and Chinese researchers, the project will bring new blood and ideas into the academic research of both regions. Moreover, this staff exchange programme will help to cross-fertilise and exchange ideas in order to accelerate the development and knowledge transfer of wireless multimedia networks, set up future joint research projects, and build up long-term world-class collaboration. This project will contribute to the development and maintenance of the European research community’s leading international profile and global influence in the fields of wireless networking and multimedia processing.

The work performed and the results achieved so far:

• WP1: Project Management and Knowledge Transfer Coordination

WP1 focuses on the management activities and is dedicated to project administration and coordination of both research activities and knowledge transfer activities to ensure smooth and timely operation of the project. The project Kick-off Meeting was held in conjunction with the first internal workshop at TJU, Shanghai, China on 04 July 2014. The event attracted 20 participants from all the partners including the project Coordinator, all WP Leaders, Experienced Researchers and Early-Stage Researchers. The Kick-off meeting focused on discussion of the project management, scientific contents, staff exchange and secondment plan. The internal workshop was dedicated to exchanging ideas among partners and exploring collaborative research opportunities. The Kick-off Meeting and workshop were very successful because the participants got more familiar with each other, understood better the project and financial policy, confirmed a project plan, and finalised a priority action list at the meeting.
The project Partnership Agreement (PA) has been signed by all partner organisations in order to assure that the project is implemented in conformity with the provisions of the Grant Agreement (GA) and in line with the description of work. The pre-financing has been distributed by the Coordinator organization to all project beneficiaries, according to the PA.
The 2nd internal workshop was held at FDU, Shanghai, China on 14 August 2015 for the partners to exchange ideas, transfer knowledge, and reinforce collaborative research and development. In addition, the partners discussed the project management, scientific contents, staff exchange and secondment plan at the workshop.
The 2015 International Workshop on Heterogeneous Wireless Networks and Quality-of-Experience (HWNQoE-2015) was held by UoE in the UK on 26 October, 2015 for the project partners to exchange ideas, transfer knowledge, and reinforce collaborative research and development. The international workshop also helped to raise wider awareness of this important topic, to spark more fierce discussions and to disseminate the research achievements to the public research community.
In total, the staff exchange and secondment of 63.85 man*month have taken place.

• WP2: Requirements Analysis and System Architecture

In WP2, the project consortium has conducted a thorough requirement analysis of heterogeneous wireless multimedia networks and the detailed design of the overall system architecture to improve the QoE of mobile multimedia over heterogeneous wireless networks.
Specifically, we have investigated the emerging mobile multimedia applications over heterogeneous wireless networks and identified the characteristics of emerging typical mobile multimedia applications including video services, audio services and burst data services. For each user case, the detailed analysis of QoE and system requirements is performed. This in-depth analysis and the identified QoE requirements offer the important guideline for design of the overall system architecture and the definition of the system functional components for the latter stage of QUICK project. Furthermore, the bottlenecks of the existing wireless access technologies are discussed.
These service requirements are translated to the system design in terms of working scenarios, protocols and algorithms, as well as performance metrics and targets by exploiting the integration between heterogeneous wireless networking at the transmission layer and multimedia processing at the application layer. We have proposed several solutions to support content-rich multimedia data delivery in typical heterogeneous network environments. These solutions fill in the cross-layer system architecture of the project as key components. Specifically, we have designed a resource allocation scheme, taking both the application layer service requirements and the MAC layer scheduling strategies into consideration, based on game theory to support efficient video transmission and caching. To facilitate local multimedia content distribution in indoor environments, a direct device-to-device (D2D) information delivery strategy using user cooperation and network coding is proposed and analyzed. In addition, cross-layer optimization within the transmission layer (e.g., between the MAC and the physical layers, or between the network and the physical layers) can also provide significant performance improvement for application layer services. To this end, we have proposed a downlink multi-user (MU) simultaneous transmission scheme, which can potentially enhance the QoE of multiple UEs being served simultaneously in MMV multiple access networks.

• WP3: Network-aware Adaptive Multimedia Processing

WP3 has focused on development of new techniques for multimedia coding and content adaptation over non-stationary wireless channels in order to address the problem caused by the mismatch between the QoE required by the resource-hungry multimedia users and the QoS offered by the underlying heterogeneous wireless networks. According to various network conditions and the displaying capabilities of mobile devices, adaptive transcoding is necessary to transcode the video content from one format to another according to the requirements comprising network bandwidth, spatial resolution of devices and encoding format. This project has investigated the following mechanisms:
1) Knowledge-based High Efficiency Multimedia Coding: We introduced a knowledge-based coding method for encoding multi-source surveillance video data, aiming at exploiting the redundancy induced by multiple video sources. A hybrid knowledge-based prediction was developed for efficient coding via knowledge-based coding, which enables the proposed coding method to outperform High Efficiency Video Coding (HEVC) considerably in terms of both bit rate and final data storage.
2) Adaptive Transmission Control for Real-time Transcoding Based on Precise Network Assessment: We studied the problem of how to make full use of network resources to ensure the quality of videos and achieve network-awareness during the video transcoding process. When the network is non-stationary normal, subtractive decrease factor is employed to slightly adjust the bitrate. In addition, a new active frame discarding strategy which can automatically choose the frames to be discarded is proposed to alleviate the network congestion.
3) Fast Video Enhancement Transcoding for Low-Lighting Video Stream: The proposed enhancement transcoding for low-lighting videos can convert the compressed low-lighting video into compressed normal-lighting one while transcoding. To speed up the enhancement transcoding process, we firstly studied the effects of enhancement on coding mode decision. Distinct statistics of low-lighting videos and normal-lighting videos result in different coding modes, which can enforce latent constraints on mode conversion during transcoding.

• WP4: Multimedia-driven Heterogeneous Wireless Networking

WP4 aims to research into the design of revolutionary protocols and algorithms for heterogeneous wireless networks in order to provide an efficient underlying communication infrastructure for delivering bandwidth-hungry and computation-intensive mobile multimedia applications with QoE requirements. The major obstacles that affect the users QoE of multimedia streaming over heterogeneous wireless networks are multiple radio access technologies, severe channel impairments, limited network resources, and dynamic user mobility. To address these problems inherent in heterogeneous wireless networks, the activities in WP4 are organized to investigate into multimedia-driven network resource management in order to enhance the system capacity and QoE, improve energy efficiency, achieve seamless connection and ubiquitous coverage.
We firstly investigated into novel technologies to end-to-end (E2E) manage the whole pool of available network resources. The idea is to make full use of the complementary characteristics offered by different radio access technologies in order to exploit the trunking gain leading to a higher overall system capacity. To this end, we proposed a novel software defined wireless network (SDWN) architecture with resource description function, along with two ontologies for the resource description of the latest wireless network.
Secondly, we proposed a cost-effective scheme to integrate the management of users mobility and QoE, which makes it possible to take into account a richer set of parameters, such as the signal-to-noise ratio, objective network performance indicators and subjective QoE requirements, to initiate handovers across different wireless access networks for seamless connection and ubiquitous coverage. Also, the dynamic power management protocols were developed to avoid useless activity and schedule appropriate operations such that the differences in power states are exploited as much as possible subject to the QoE constraints of mobile multimedia in heterogeneous wireless networks.
Thirdly, for using of mmWave in 5G heterogeneous wireless networks (HetNets), we investigated the effect of nonorthogonal beam interference and then proposed two novel solutions. (1) Dynamic Beam Switching: the transmitting and receiving beam (T-R beam pair) between the MBS and each SUE can switch to a suitable candidate T-R beam pair to avoid severe nonorthogonal beam interference. (2) Static Beam Selection: select the T-R beam pairs which can transmit simultaneously with tolerable nonorthogonal beam interference among them. On this basis, a multi-user simultaneous transmission scheme in mmWave 5G HetNets supporting multiple orthogonal and/or nonorthogonal beams is proposed.

The address of the project public website is

Reported by

United Kingdom


Life Sciences
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