نتایج جستجو برای: fec
تعداد نتایج: 2532 فیلتر نتایج به سال:
Forward Error Correction (FEC) is one of the most common means of performing packet error recovery in data transmissions. FEC schemes typically tune the FEC rate in accordance with feedback information provided by the receiver. However, the feedback and FEC rate calculation processes inevitably have a finite duration, and thus the FEC rate implemented at the sender may not accurately reflect th...
We propose a new adaptive FEC scheme combined with ELN (Explicit Loss Notification) that was proposed for improving TCP performance in wireless cellular networks. In our method, transmission errors on the wireless link are measured at the packet level and the error status is notified the TCP sender with ELN. According to this information, an appropriate FEC code is determined in order to maximi...
FEC (Forward Error Correction) techniques are widely used in streaming data applications. The increasing popularity of streaming over wireless links, however, poses additional challenges because of its high data loss characteristic and the energy/computation limitation of wireless terminals. Consequently, traditional FEC schemes might no longer be suitable. And new FEC scheme is desirable in th...
We propose and evaluate novel reliable multicast protocols that combine active repair service (a.k.a. local recovery) and parity encoding (a.k.a. forward error correction or FEC) techniques. We show that, compared to other repair service protocols, our protocols require less buffer inside the network, maintain the low bandwidth requirements of previously proposed repair service / FEC combinatio...
با توجه به روند روز افزون استفاده از اینترنت و افزایش تقاضا برای استفاده از اینترنت بی سیم در فواصل دور، طراحی استاندارد و سیستمی برای این منظور لازم به نظر می آمد. به همین دلیل استاندارد (802.16) wimax در سال 2004 ایجاد شد تا به این نیاز ها پاسخ داده باشد. استاندارد wimax از مخابرات باند پهن استفاده می کند و تاکنون سرمایه گذاری های زیادی در دنیا روی آن انجام شده است. اما، مشکلات و پیچیدگی های ...
Forward error correction (FEC) is a common error control technique to improve the quality of video streaming over lossy channels. To optimize the data recovery performance, frame-level FEC schemes have been proposed for streaming video to maximize playable frame rate (PFR) within transmission rate constraint on a random binary symmetric channel (BSC). However, burst loss is a commonplace in cur...
Link-Quality Aware Run-Time Adaptive Forward Error Correction Strategies in Wireless Sensor Networks
This paper investigates the potential of Forward Error Correction (FEC) mechanisms and dynamic/run-time adaptive FEC variants in Wireless Sensor Networks. We implemented eight different Error Correction Codes (ECCs), ranging from simple bit-repetition schemes over Hamming codes to complex Bose-Chaudhuri-Hocquenghem codes, and three run-time adaptive FEC schemes which adapt the correctional powe...
Multi-rate forward erasure correction (FEC)applied wireless multicast enables reliable and efficient video multicast with intelligent selection of physical (PHY) layer data rate and FEC rate. The optimal PHY/FEC rates depend on the cause of the packet losses. However, previous approaches select the PHY/FEC rates by considering only channel errors even when interference is also a major source of...
BACKGROUND Taxanes are among the most active drugs for the treatment of metastatic breast cancer, and, as a consequence, they have also been studied in the adjuvant setting. METHODS After breast cancer surgery, women with lymph node-positive disease were randomly assigned to treatment with fluorouracil, epirubicin, and cyclophosphamide (FEC) or with FEC followed by weekly paclitaxel (FEC-P). ...
Forward error correction (FEC) schemes have been proposed and used successfully for multicasting realtime video content to groups of users. Under traditional IP multicast, application-level FEC can only be implemented on an end-toend basis between the sender and the clients. Emerging overlay and peer-to-peer (p2p) networks open the door for new paradigms of network FEC. The deployment of FEC wi...
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