A wireless billboard channel over digital video broadcasting-handheld platform

This paper investigates how Scalable Video Coding (SVC) can benefit from different Forward Error Correction (FEC) and transmission schemes in mobile broadcast systems. Simulation are performed in DVB-H (Digital Video Broadcasting - Handheld) systems. In DVB-H, a differentiation in robustness for the different SVC layers can be achieved at the link layer using intra-burst MPE-FEC (multi-Protocol Encapsulation FEC). The paper evaluates the gain that can be achieved with the MPE-FEC using equal (EEP) and unequal error protection (UEP), and the performance improvements of an SVC layer-aware FEC (LA-FEC) approach that can be implemented in DVB-H either at the link layer with MPE-iFEC (inter-burst MPE-FEC) or at the application layer with AL-FEC. LA-FEC improves the SVC base layer robustness generating parity information across existing dependencies within the SVC video coding structure. Laboratory measurement results using a TU6 channel model show that the performance of an SVC service in DVB-H can be significantly increased by a proper link layer FEC scheme. It is shown that using SVC in combination with LA-FEC and a proper transmission scheduling does not only give a better performance in terms of PSNR and amount of video outages compared to a single layer service at the same service bit rate, but also gives an additional lower quality layer which can be used for applications like conditional access.

RS (Reed - Solomon) code is used in DVB-H (digital video broadcasting - handheld) system as an addtional error correcting code to improve the performance during mobile reception. LDPC (low density parity check) code which is rediscovered recently shows the astonishing performance. Therefore LDPC code can be used to replace RS code in order to improve the performance further since both of them are block codes. So the performance of LDPC code in MPE-FEC (multi protocol encapsulation - forward error correction) frame of DVB-H system is analyzed in this paper.

This article studies the performance of the Sliding RS Encoding (SRSE) in the transmission of streaming services in DVB-H (Digital Video Broadcasting - Transmission System for Handheld Terminals) networks. The SRSE forms part of a set of specifications called MPE-iFEC which has been recently defined in the DVB-SH (Digital Video Broadcasting - Satellite Services to Handheld Devices) standard and is fully compatible with the link layer of DVB-H. MPE-iFEC is capable of encoding information related to different datagram bursts in a jointly manner in order to counteract the long signal blockages expected in satellite reception. This is what is usually referred to as Multi-Burst Encoding (MBE) and provides a protection that extends across several time sliced bursts. MBE can also improve the reception in terrestrial networks such as DVB-H, which relay in the use of MPE-FEC (Multi Protocol Encapsulation - Forward Error Correction) for link layer protection. The SRSE employs the same Reed Solomon (RS) algorithm used in MPE-FEC and a sliding encoding mechanism in order to perform MBE. This paper evaluates the improvements that the use of SRSE can achieve over the legacy MPE-FEC using vehicular urban field measurements in a DVB-H single frequency network. The effect of the different parameters that regulate the operation of the SRSE will be evaluated and the best configurations for its use in DVB-H will be highlighted.

This paper describes the design and implementation of a digital video broadcasting - handheld (DVB-H) physical-layer testbed simulator. The objective is to simulate the broadcasting of service advertisements' over the newly defined wireless billboard channels (WBCs). Initial performance evaluation results obtained from the testbed are provided and discussed.

A changed wireless environment for 4G and future generations of wireless communications is addressed in this chapter. This change is primarily focussed on making the end user of wireless services more central and more a consumer in the global wireless environment than heretofore. In the ‘Ubiquitous Consumer Wireless World (UCWW)’ –the descriptive name for this new wireless environment paradigm– the global supply of wireless communications services is founded on the new Consumer-centric Business Model (CBM). This is a radical change and departure from present globally pervasive business model for service delivery based on the user being a subscriber, called appropriately the Subscriber-centric Business Model (SBM). The reasons and background for the drive to bring about this changed wireless environment are reviewed, with the main body of the chapter focusing on descriptions of the technological composition of two of the new core infrastructural enabling elements. These are the third-party authentication, authorization, and accounting (3P-AAA) service, and the service advertisement, discovery, and association (ADA) through newly defined wireless billboard channels (WBCs). The former, 3P-AAA, arises from the need to bring about a separation of the supply of the AAA service from the supply of the communications service, which is necessary to ensure the consumer character of the user and to promote and safeguard all the new benefits that will flow for users, new consumer-oriented wireless access network providers, and other stakeholders through this new wireless environment. As there will be restructuring implications for the operation and location of charging and billing functions, treatment of this aspect is also included. The latter, ADA & WBCs, arises in tandem with this separation of services, the consequent metric of business success changing from ‘number of subscribers’ to ‘number of consumer transactions and service purchases’ and the need, therefore, for a new direct ‘push’ advertisement means for service providers to attract consumers and for consumers to be continually up-to-date on new service offerings. The proposals for protocol interfaces and architectures for both these elements are explored and discussed, with those aspects needing to be addressed in global standardization activities highlighted.

Digital Video Broadcasting - Handheld (DVB-H) specification suite enables reception of point-to-multipoint multimedia transmission with mobile devices. It provides good forward error correction (FEC) capabilities to combat transmission errors. However, transmission errors can be occasionally so severe that FEC decoding fails. The residual transmission errors can degrade the audio-visual quality dramatically. This paper presents an error control method, called synchronized audio redundancy coding. It aims to ensure audio continuity under severe channel error conditions. The presented method was compared to conventional FEC-based error protection of DVB-H in a large-scale subjective experiment. It was found that synchronized audio redundancy coding outperformed the conventional error protection in most test cases.

The digital broadcasting standards DVB-H (Digital Video Broadcasting - Handheld) enables a high data rate broadcast access for hand-held terminals (e.g., portable, pocket-size battery-operated phones). For actual DVB-H reception, indoor coverage is required because users are likely to be inside a building. Therefore, one needs building-penetration models, accounting for an additional propagation loss, due to the building where the user is present. This paper presents the penetration loss measurements performed at 600 MHz (ultra high frequency or UHF, band V) in an office building in a suburban environment. At this frequency the propagation characteristics remain acceptable to offer coverage in a large area and the size of the receiving antenna is suitable for integration in a handheld.

In this paper we discuss the need for dynamic system-level simulations for DVB-H (Digital Video Broadcast - Handheld), specifically to evaluate the overall system performance perceived by mobile users dynamically over time. Such simulations can be used as a complement of traditional radio coverage planning tools for analyzing quality of service and radio resource management aspects of the DVB-H network. We describe a general simulation structure and the main models required, and validate, using vehicular urban field measurements, a DVB-H physical layer performance model that enables these analyses.

The Digital Video Broadcasting - Handheld (DVB-H) standard is the ETSI standard for delivering broadcasting services of high data rates to handheld devices, under high mobility conditions. This paper will compare the different modulation techniques used by the DVB-H standard from the coverage point of view. The coverage estimation simulations have been made with a specialized RF planning tool using real Geographic Data for the metropolitan region of Athens. Thus, we will present a comparative study, of various planning factors like coverage percentage and location probability and compare them for the different modulation schemes used.

The digital video broadcasting to handhelds (DVB-H) is one of the proposed broadcast platforms for the wireless billboard channels (WBCs) which carry wireless communication service advertisements to mobile terminals (MTs). Advertisements, structurally encoded into 'service descriptions' are organised into IP packets for transmission using a IP datacasting technique (IPDC) carried by high-order forward error correction (FEC) multi-protocol encapsulation (MPE) logical link control (LLC) protocol designed for improved reliable communication over DVB-H mobile channels which are subject to dispersive Rayleigh fading conditions. The IP packet error rate and overhead efficiency are the two main QoS measures for the performance of WBC over DVB-H. Increasing the IP packet length increases the overhead efficiency, but at the same time decreases the reliability due to the increased error probability.

Digital video broadcasting - handheld (DVB-H) is the technology driving mobile TV, which uses orthogonal frequency division multiplexing (OFDM) systems with multiple-input multiple-output technology (MIMO). These mobile communication systems have a promising future of supporting high data rate transmissions for both video and data. However, since the OFDM systems are sensitive to the peak-to-average power ratio (PAPR) problem, this work proposes a new technique (novel technique to reduce the PAPR based on turbo coding (NTRPT)), based on the turbo encoding technology, to reduce the PAPR effects for MIMO-OFDM-based DVB-H systems. This technique has been implemented and validated in hardware. It can support different types of modulation and coding techniques, and offers better results in reducing the PAPR than the conventional techniques currently proposed for this purpose, such as the clipping technique and the partial transmit sequence (PTS) technique, presented here using computer simulations.

With the increasing capabilities of mobile terminals, the reception of mul-timedia content is becoming more and more attractive for customers. Im-proving high bandwidth provision enables 3G cellular systems to deliver such data to the end user. The 3G mobile experience is following a trend towards personalized services and applications which are used not only for voice communication but also for entertainment. Customers favour short video/audio clips rather than watching complete movies on their small screen. The deployment of new broadcasting networks like Digital Video Broadcasting - Handheld (DVB-H) results in large costs both in terms of capital as well as operating expenditure. Hence it is an enormous commer-cial risk for providers to install such systems. Multimedia Broadcast Multicast Service (MBMS) is considered a prom-ising technology to distribute multicast and broadcast services efficiently and at reasonable costs within existing 3GPP cellular networks. Enriched interactive multimedia services can be offered providing, for example, the latest news or publishing the current top ten music video clips. The trend towards user generated content distribution which is observed in the Inter-net will no doubt increase the number of available services and content. Set against this background of predicted increase both in terms of num-ber of services/content and users, the competition for limited resources will only intensify. MBMS is regarded as a bearer technology and not a com-plete service provisioning system therefore efficient scheduling for optimal utilization of radio and network resources is essential. Scheduling in MBMS comprises several levels of abstraction which require different strategies. This chapter presents several scheduling techniques and ap-proaches for MBMS content distribution. It explains the concepts of (1) a Dynamic MBMS Resource Scheduler located in the Radio Access Network (RAN), (2) a Carousel Service Scheduling approach and (3) means for an optimal scheduling of Multicast Streaming Services. The latter two sched-ule services and content while the first deals with IP packets.

Efficient programmable baseband processors are important in order to enable true multi-standard radio platforms and software defined radio systems. In programmable processors, the memory sub-system accounts for a large part of both the area and power consumption. This paper presents a methodology for designing memory efficient multi-standard baseband processors. The methodology yields baseband processor micro-architectures, which eliminate excessive data moves between memories while still allowing true flexibility by utilizing SIMD clusters connected to memory banks via an internal network. The methodology has successfully been used to create a multi-standard baseband processor for OFDM-based wireless standards. This paper discusses the IEEE 802.16e (WiMAX), DVB-H (digital video broadcast - handheld) and DAB (digital audio broadcast) standards. The architecture is truly scalable to accommodate future OFDM systems. Scheduling and resource allocation show that with the proposed memory structure and architecture, the processor can manage the baseband functions of the described standards operating at 80 MHz and using only 28k words of memory

The digital video broadcasting-handheld (DVB-H) standard is one of the latest transmission standards developed by the digital video broadcasting (DVB) Project. DVB-H, which is based on the standard for digital terrestrial television (DVB-T), offers mobile television and other broadcasting services on small portable devices such as mobile phones. This article presents an overview of the DVB-H standard with respect to structure, features, technology, performance, and resources.

A new national standard for digital multimedia broadcasting (DMB) has been launched in Korea to provide high-quality digital audio, video, and data broadcasting services to fixed, mobile, and portable receivers. We have developed a low-power portable terrestrial DMB (T-DMB) receiver, which can decode not only T-DMB video services but also various data services. In particular, it can simultaneously decode DMB video and data services in the same ensemble.