Interactive channel for multimedia satellite networks

Neale, J.; Green, R.; Landovskis, A.

doi:10.1109/35.910607

Cited by 54 publications

(25 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It leverages the highly successful DVB-S standard and more recently the DVB-S2 standard [22]. The standard defines the Logon, synchronisation and control functions that augment a DVB-S or S2 link to provide a return channel using Multi-Frequency Time-Division Multiple Access (MF-TDMA).…”

Section: Dvb Standardsmentioning

confidence: 99%

Waveform diversity and design: Part II - issues for waveforms and applications

Sturman¹,

Guidi²,

Dingley³

et al. 2008

IET Seminar Digests

View full text Add to dashboard Cite

Waveform diversity and design (WDD) aspects are considered in this paper drawing relations to some of the functions between the communication system layers from the given user application through to the actual waveforms. The traditional approach to WDD was typically separated within the final waveform, which has previously been composed in a monolithic manner, in an epoch when the low capacity needs, say, associated with the traditional voice-only application coupled with a relative abundance in radio-frequency (RF) spectrum enabled this approach to be deemed satisfactory.However, in more recent times, particularly over the last decade, a wide range of issues have required a need for a reassessment of the conventional WDD approach. The factors which have motivated this need include the proliferation of user applications above the basic communications need of voice only, to a wide range of internet services and real-time applications. This broadening of user services and applications challenges the communications design environment particularly due to the limited availability of RF spectrum. The situation is exacerbated further by the current communication user's expectations of a wide range of variable-quality services and applications within mobile environment.WDD techniques can be used to support a breadth of communication needs by supporting the use of efficient waveform, dependent upon the given application and matching the existing communications environment. This paper, forming the second part of the two-part series, aims to demonstrate WDD within a single-antenna context, and the first part identified issues for multi-antenna systems. Features of the importance of the control and management planes are discussed, including, for example, the control loops for the purpose of enhancing performance at the service and application level through WDD techniques. A part solution within this context will employ cognitive radio (CR) especially in the efforts of maximising the availability of current waveforms, and standards within commercial standards are briefly reviewed. IntroductionThis paper draws out some of the key WDD features with relation to services and applications. Attention is paid to some of the current commercial wireless waveform standards including both terrestrial and non-terrestrial. The aim of this paper is to provide some of the motives behind a waveform construction and how the waveforms and applications can be optimised, in conjunction with various attributes at the physical level drive the construction of a particular waveform. Some of the information material in the following discussion originates from references [1] and [2].Focus on WDD from the services and applications point of view is made including:• Elements of a physical layer definition • Both terrestrial and satcom situations and some example standards • Real-time and non-real-time applications • Rain fade issues at high bands, Q-and V-band included in the discussion • Link budget issues • DVB-RCS and DVB-S2 standards and their featur...

show abstract

Section: Dvb Standardsmentioning

confidence: 99%

Waveform diversity and design: Part II - issues for waveforms and applications

Sturman¹,

Guidi²,

Dingley³

et al. 2008

IET Seminar Digests

View full text Add to dashboard Cite

show abstract

“…The drawback of TDMA is the need to size the earth stations for the entire system capacity (transponder bandwidth), even though a single terminal uses a small portion of that. An interesting solution is given by the hybrid combination of MultiFrequency (MF) with TDMA systems, which shares advantages of both FDMA and TDMA 278 [32]. In MF-TDMA the transponder spectrum is divided into several carriers, thus allowing to size the station on a narrower bandwidth.…”

Section: Access Schemesmentioning

confidence: 99%

“…This specifies a satellite terminal (sometimes known as a Satellite Interactive Terminal (SIT) or Return Channel Satellite Terminal (RCST)) supporting a two-way DVB satellite system. The specifications address encoding, security and MAC protocols for these channels, which operate at rates of up to 2 Mbps [116]. Return channels comprise either ATM cells or 188 byte MPEG2-TS (Transport Stream) packets.…”

Section: An Example Of Standards At Layer 2: the Dvb Familiesmentioning

confidence: 99%

Radio resource management across multiple protocol layers in satellite networks: a tutorial overview

Barsocchi

Celandroni

Davoli

et al. 2005

Satell Commun Network

View full text Add to dashboard Cite

Satellite transmissions have an important role in telephone communications, television broadcasting, computer communications, maritime navigation, and military command and control. Moreover, in many situations they may be the only possible communication set-up. Trends in telecommunications indicate that four major growth market/service areas are messaging and navigation services (wireless and satellite), mobility services (wireless and satellite), video delivery services (cable and satellite), and interactive multimedia services (fibre/cable, satellite). When using geostationary satellites (GEO), the long propagation delay may have great impact, given the end-to-end delay user’s requirements of relevant applications; moreover, atmospheric conditions may seriously affect data transmission. Since satellite bandwidth is a relatively scarce resource compared to the terrestrial one (e.g. in optical transport networks), and the environment is harsher, resource management of the radio segment plays an important role in the system’s efficiency and economy. The radio resource\ud management (RMM) entity is responsible for the utilization of the air interface resources, and covers power control, handover, admission control, congestion control, bandwidth allocation, and packet scheduling. RRM functions are crucial for the best possible utilization of the capacity. RRM functions can\ud be implemented in different ways, thus having an impact on the overall system efficiency. This tutorial aims to provide an overview of satellite transmission aspects at various OSI layers, with emphasis on the MAC layer; some cross-layer solutions for bandwidth allocation are also indicated. Far from being an exhaustive survey (mainly due to the extensive nature of the subject), it offers the readers an extensive bibliography, which could be used for further research on specific aspects

show abstract

“…The development of DVB-RCS specification began in 1997 and was approved as a European Telecommunications Standards Institute (ETSI) specification in 2000 [1]. The DVB-RCS consists of a forward channel based on DVB/MPEG2 data format and a return link using Multi Frequency Time Division Multiple Access (MF-TDMA) scheme, thus allowing a two way exchange of data [3]. The standard gives complete mechanism for different communication applications ranging from internet to voice over IP and video conferencing via satellite, with end to end quality of service [38].…”

Section: Introductionmentioning

confidence: 99%

“…The DVB-RCS concept provided by Jason Neale [3] is shown in Fig. 1 and is described as an Interactive Channel for Multimedia Satellite Networks (ICMSN).…”

Section: Introductionmentioning

confidence: 99%

Adaptive robust video broadcast via satellite

Altaf

Khan

Qadri

et al. 2016

Multimed Tools Appl

View full text Add to dashboard Cite

Abstract:With increasing demand for multimedia content over channels with limited bandwidth and heavy packet losses, higher coding efficiency and stronger error resiliency is required more than ever before. Both the coding efficiency and error resiliency are two opposing processes that require appropriate balancing. On the source encoding side the video encoder H.264/AVC can provide higher compression with strong error resiliency, while on the channel error correction coding side the raptor code has proven its effectiveness, with only modest overhead required for the recovery of lost data. This paper compares the efficiency and overhead of both the raptor codes and the error resiliency techniques of video standards so that both can be balanced for better compression and quality. The result is also improved by confining the robust stream to the period of poor channel conditions by adaptively switching between the video streams using switching frames introduced in H.264/AVC. In this case the video stream is initially transmitted without error resiliency assuming the channel to be completely error free, and then the robustness is increased based on the channel conditions and/or user demand. The results showed that although switching can increase the peak signal to noise ratio in the presence of losses but at the same time its excessive repetition can be irritating to the viewers. Therefore to evaluate the perceptual quality of the video streams and to find the optimum number of switching during a session, these streams were scored by different viewers for quality of enhancement. The results of the proposed scheme show an increase of 3 to 4 dB in peak signal to noise ratio with acceptable quality of enhancement.Keywords Digital Video Broadcast · Error Resiliency · H.264/AVC · Raptor Codes

show abstract

Interactive channel for multimedia satellite networks

Cited by 54 publications

References 1 publication

Waveform diversity and design: Part II - issues for waveforms and applications

Waveform diversity and design: Part II - issues for waveforms and applications

Radio resource management across multiple protocol layers in satellite networks: a tutorial overview

Adaptive robust video broadcast via satellite

Contact Info

Product

Resources

About