Multi-frame packet reservation multiple access for variable-rate multimedia users

Brecht, John; Hanzo, Lajos; Buono, M. Del

doi:10.1109/pimrc.1997.630968

Cited by 3 publications

(6 citation statements)

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“…We emphasize again that the design principles transpiring from this paper in the context of low-rate video codecs are equally applicable to the high-rate WATM arrangements of [146] and [147]. A range of multiple access schemes amenable to variable-rate multimedia statistical multiplexing were proposed, e.g., by Brecht et al in [160]- [162]. In our proposed system, the associated acknowledgment feedback flag is transmitted within a TDD frame duration of 20 ms, which is a small fraction of the 100-ms video-frame refreshment interval encountered in the case of a video frame rate of 10 frames/s.…”

Section: B Multimode Video Transceiversmentioning

confidence: 94%

“…The statistical nature of the proposed centralized slot assignment scheme facilitated an accurate matching of bit-rate requirements for different rate video services with a minimal amount of signaling, while maintaining a throughput of up to 93% at the cost of a low delay, where throughput was defined as the proportion of time during which the transmission medium was actively engaged in communications. A further alternative to support similar multirate multimedia users was also proposed by Brecht et al, which was termed multiframe PRMA (MF-PRMA) [161], [160].…”

Section: B Multimode Video Transceiversmentioning

confidence: 99%

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Interactive cellular and cordless video telephony: State-of-the-art system design principles and expected performance

2000

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Second-generation (2G) mobile radio standards have not been designed with video communications in mind, although the employment of error-resilient, constant-bit-rate proprietary video codecs over these systems is realistic. The third-generation (3G) systems I. STATE-OF-THE-ART SYSTEM COMPONENT DEVELOPMENTS A. Introduction and OutlineThe subject of mobile radio communications has reached a state of maturity over the past two decades, as indicated by the excellent monographs by Jakes This contribution attempts to summarize a range of recent advances in the field of bandwidth-efficient wireless video communications. In this section, we commence our discourse with a brief overview of the wireless scene and, in particular, by considering the video transmission capabilities of the existing and future wireless systems. The geographical variation of the cellular channel capacity is characterized by Section II, as a motivation for invoking burst-by-burst adaptive transceivers [27]- [29]. The nature of co-channel interference (CCI)-which is the most dominant channel impairment in wireless systems-is the topic of Section III, where it is shown that the geographic variation of CCI justifies the employment of multimode transceivers, which are discussed in Section IV. Low-rate video compression aspects are reviewed in Section V, and the performance of the ITU H.263 codec is analyzed in some depth. Our discussions in Sections VI and VII are focused on the performance of reconfigurable video transceivers. Specifically, in Section VI, no power control is used-which is typically the case in cordless telephones, such as DECT and CT2-while in Section VII, power control is employed, which is characteristic of cellular systems, such as GSM [30], etc. Section VIII proposes a near-instantaneously adaptive or burst-by-burst adaptive code-division multiple-access (CDMA) scheme, which can be invoked in the context of the forthcoming 3G systems, in order to enhance their performance. Lastly, our discussions are concluded in Section IX with a range of system design guidelines. Let us now commence our overview of the range of existing and forthcoming wireless systems and their video transmission capabilities. B. Second-Generation (2G) Wireless SystemsThe existing 2G wireless systems now constitute a mature technology. Although they have not been designed with video communications in mind, with the advent of the specially designed error-resilient, fixed-rate video codecs [27]-[35] proposed by Streit et al., it is nonetheless realistic to provide videophone services over these low-rate schemes. For low-latency interactive videophony these systems have

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Section: B Multimode Video Transceiversmentioning

confidence: 94%

Section: B Multimode Video Transceiversmentioning

confidence: 99%

Interactive cellular and cordless video telephony: State-of-the-art system design principles and expected performance

2000

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“…A further alternative to support similar multirate multimedia users was also proposed by Brecht et al, which was termed MF-PRMA [226], [329]. Here, we emphasize that most of the above statistical multiplexer schemes function also as multimedia packet multiplexers, supporting the delivery of multirate, multimedia traffic on a demand basis, giving cognizance to the different stability constraints of speech video and data sources.…”

Section: B Multiple Accessmentioning

confidence: 96%

“…However, data and run-length-coded variablerate video are extremely error sensitive, hence requiring higher integrity than speech and fixed-rate nonrun-lengthcoded video. Some of these aspects were also addressed in [226]- [228] and [232].…”

Section: B Multiple Accessmentioning

confidence: 99%

Bandwidth-efficient wireless multimedia communications

Hanzo

1998

Proc. IEEE

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“…This is particularly true in conjunction with the statistical multiplexing scheme of [13], where the packet acknowledgment bit can be included in the BS's slot-allocation broadcast message, and a previously corrupted packet can be retransmitted in the same frame as the current one by allocating more slots to the user concerned, at the cost of temporarily disadvantaging other users in terms of the reduced number of slots available to them. Fig.…”

Section: A System Performance Without Arqmentioning

confidence: 99%

Programmable H.263-based wireless video transceivers for interference-limited environments

Cherriman

Hanzo

1998

IEEE Trans. Circuits Syst. Video Technol.

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In order to exploit the nonuniformly distributed channel capacity over the cell area, the intelligent 7.3-kB programmable videophone transceiver of Table I is proposed, which is capable of exploiting the higher channel capacity of uninterfered, high-channel-quality cell areas, while supporting more robust, but lower bit-rate operation in more interfered areas. The system employed an enhanced H.263-compatible video codec. Since most existing wireless systems exhibit a constant bit-rate, the video codec's bit-rate fluctuation was smoothed by a novel adaptive packetization algorithm, which is capable of supporting automatic repeat request (ARQ)-assisted operation in wireless distributive video transmissions, although in the proposed lowlatency interactive videophone transceiver, we refrained from using ARQ. Instead, corrupted packets are dropped by both the local and remote decoders in order to prevent error propagation. The minimum required channel signal-to-interference-plus-noise ratio (SINR) was in the range of 8-28 dB for the various transmission scenarios of Table I, while the corresponding video peak-signal-to-noise ratio (PSNR) was in the range of 32-39 dB. The main system features are summarized in Table I. Index Terms-H.263-based video communications, interactive wireless video, QAM-based video transmission, video communications in interference-limited environments, video tranceivers.

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Multi-frame packet reservation multiple access for variable-rate multimedia users

Cited by 3 publications

References 5 publications

Interactive cellular and cordless video telephony: State-of-the-art system design principles and expected performance

Interactive cellular and cordless video telephony: State-of-the-art system design principles and expected performance

Bandwidth-efficient wireless multimedia communications

Programmable H.263-based wireless video transceivers for interference-limited environments

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