A hybrid ARQ scheme with adaptive forward error correction for satellite communications

Shiozaki, Akira; Okuno, K.; Suzuki, K.; Segawa, T.

doi:10.1109/26.81734

Cited by 20 publications

(7 citation statements)

References 10 publications

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“…Wireless channels introduce different requirements where BERs are higher while the computational and energy resources are limited. The use of FEC in such conditions were studies in [3] [4]. FEC is computationally expensive and has additional energy requirements, but the costly use of FEC is unnecessary under good channel conditions.…”

Section: Related Workmentioning

confidence: 98%

A Comparison of Packet-Level and Byte-Level Reliable FEC Multicast Protocols for WLANs

Basalamah

Sato

2007

IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference

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For wireless multicast applications like multimedia conferencing, voice over IP and video/audio streaming which require reliable transmission of packets within short delivery delay, adding Foward Error Correction (FEC) can enhance Packet Error Rate (PER) performance under low channel conditions, but cannot guarantee a reliable transmission. However, for applications like file transfer, distributed computing, chat and whiteboard sharing, reliability is crucial to the performance of the application. Reliable FEC or Hybrid Automatic Repeat Request (H-ARQ) can provide reliability, and can be deployed at different levels of the protocol stack. In this paper, we compare the performance of a reliable packet-level FEC protocol and a reliable byte-level FEC protocol through simulation and analytical analysis. Our result show that byte-level FEC can deliver a higher reliability performance in terms of throughput and delivery ratios.

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Section: Related Workmentioning

confidence: 98%

A Comparison of Packet-Level and Byte-Level Reliable FEC Multicast Protocols for WLANs

Basalamah

Sato

2007

IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference

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“…The throughput achievable with a hybrid ARQ protocol can be maximized by dynamic adaptation of the channel coding parameters. In many adaptive ARQ-based protocols [18][19][20], the code-rate is selected in response to the actual channel state, which can be estimated by counting the number of erroneous frames; but an accurate estimation of channel state requires the analysis of many frames, so this is slow. A somewhat different adaptive hybrid ARQ model, due to Yang and Hossain [21], is based on the assumption that the channel state (in terms of symbol error rate) can be estimated on a frame-by-frame basis from the signal-to-noise ratio (SNR) fed back by the receiver.…”

Section: Related Workmentioning

confidence: 99%

A Hybrid Error Recovery scheme for Scalable Video Transmission over 3G Cellular Broadcast Networks

2007

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The cdma2000 1xEV-DO mobile communication system provides broadcast and multicast services (BCMCS) to meet an increasing demand for multimedia data services. But the servicing of video streams over a BCMCS network faces a challenge from the unreliable and error-prone nature of the radio channel. BCMCS uses Reed-Solomon coding integrated with the MAC protocol for error recovery. We show that this is not effective for mobiles moving at the edge of service area, where the channel condition is bad, resulting in significantly lower video quality. To improve the playback quality of an MPEG-4 FGS (fine granularity scalability) video stream, we propose a hybrid error recovery scheme incorporating a packet scheduler, which uses slots saved by reducing the Reed-Solomon coding overhead. Packets to be retransmitted are prioritized by a utility function which reduces the packet error-rate in the application layer within a fixed retransmission budget by considering of the map of the error control block at each mobile node. Our error recovery scheme also uses the characteristics of MPEG-4 FGS to improve the video quality even for a slowmoving mobile which is experiencing a high error-rate in the physical channel because of error bursts.

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“…A cost-effective and low complexity solution for adaptive coding is non-systematic RS coding, where only the number of information symbols fed to the encoder may vary to provide different error corrections. This approach allows the utilization of a single encoder-decoder pair [25]. Each codeword includes n c ¼ 4 bytes (32 bits) for CRC detection.…”

Section: Estimation Of Packet Losses Due To Propagation Impairments 69mentioning

confidence: 99%

“…This is a practical, cost-effective solution for AFEC schemes, where changes between pairs of encoders-decoders are not desirable. This method is described as non-systematic RS coding [25].…”

Section: Packet-error Statistics Incorporating Block Fecmentioning

confidence: 99%

Estimation of packet losses due to propagation impairments: Application to TCP performance over satellite

Drougas

Panagopoulos

Cottis

2007

Satell Commun Network

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SUMMARYThe transmission control protocol (TCP) is widely used to provide reliable data transmission due to its congestion and flow control mechanisms that provide reliable error recovery in higher layers. In satellite links, various atmospheric phenomena may lead to high packet loss rate (PLR) degrading the TCP throughput. Modern satellite systems operate at frequencies above 10 GHz, where rainfall is the dominant fading mechanism leading to high bit error ratio and correlated packet losses. In this paper, a mathematical analysis is presented to accurately describe the statistical properties of the packet-error process in a dynamically varying satellite channel. The proposed method is extended to provide PLR estimations when block forward error correction (FEC) is employed. A new Markov-based method, based on the previous analysis and adapted to the rain-faded satellite channel, is also presented for the estimation of TCP SACK throughput and tested against simulation results. Based on the information provided by the packet-error model, a study between the TCP performance under various FEC schemes and a proposed adaptive FEC scheme has provided indications about the superiority of the proposed model.

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A hybrid ARQ scheme with adaptive forward error correction for satellite communications

Cited by 20 publications

References 10 publications

A Comparison of Packet-Level and Byte-Level Reliable FEC Multicast Protocols for WLANs

A Comparison of Packet-Level and Byte-Level Reliable FEC Multicast Protocols for WLANs

A Hybrid Error Recovery scheme for Scalable Video Transmission over 3G Cellular Broadcast Networks

Estimation of packet losses due to propagation impairments: Application to TCP performance over satellite

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