Conference Paper

Integration of small and large packet-level FEC codes with data carousels for reliable multicast transport over satellite links

Mobile Commun. Res. Group, Surrey Univ., Guildford
DOI: 10.1109/ISWCS.2005.1547822 Conference: Wireless Communication Systems, 2005. 2nd International Symposium on
Source: IEEE Xplore

ABSTRACT Automatic repeat request (ARQ), data carousels and packet-level forward error correction (PLFEC) are fundamental techniques for combating packet loss in point-to-multipoint communications. Generally speaking, ARQ-based techniques are unattractive due to the feedback implosion they generate. Furthermore, in broadcast/multicast wireless networks, radio resources are scarce and feedback may not be an option at all. Two error mitigation mechanisms that become relevant in this scenario are data carousels and PLFEC. In this work, we consider the application of these two techniques as components of an integrated layer in satellite environments. We also investigate the impact of the type of PLFEC code, small or large, on the main user-oriented performance metric of the data carousels, the average content download time

0 Bookmarks
 · 
39 Views
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The proliferation of applications that must reliably distribute bulk data to a large number of autonomous clients motivates the design of new multicast and broadcast protocols. We describe an ideal, fully scalable protocol for these applications that we call a digital fountain. A digital fountain allows any number of heterogeneous clients to acquire bulk data with optimal efficiency at times of their choosing. Moreover, no feedback channels are needed to ensure reliable delivery, even in the face of high loss rates.
    04/2001;
  • [Show abstract] [Hide abstract]
    ABSTRACT: A case of simultaneous adenocarcinoma and primary malignant lymphoma as two independent growths of the stomach is presented. Review of the literature documented two such cases along with nine cases of the collision-tumor type. The differential criteria between this entity and collision tumor and carcinosarcoma are emphasized. Diagnosis and treatment is discussed.
    Journal of Surgical Oncology 10/1985; 30(1):42-5. · 2.64 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Lymphoma of gastric-mucosa-associated lymphatic tissue (MALT) type has been linked to infection with Helicobacter pylori. We investigated the effect on MALT lymphoma of eradicating H pylori infection. 33 patients with primary gastric low-grade MALT lymphoma associated with H pylori gastritis were treated with omeprazole (120 mg daily) and amoxycillin (2.25 g daily) for 14 days to eradicate H pylori. In addition to histology, PCR was used to examine proliferation of monoclonal B cells before treatment and during follow-up. All patients had at least two post-treatment examinations, and all became negative for H pylori, 2 after a second treatment course. On histology, 23 (70%) patients showed complete regression and 4 (12%) partial regression of lymphoma. 6 (18%) patients had no change after cure of H pylori infection. 1 was treated with chemotherapy. Of 5 treated surgically, 4 were found to have high-grade B-cell lymphoma on histology of the resected stomach and 1 a high-grade T-cell lymphoma. PCR showed complete disappearance of monoclonal B cells after cure of H pylori infection in 13 of 16 patients investigated. During median follow-up of 1 year no relapse of MALT lymphoma occurred. Low-grade primary gastric MALT lymphoma can completely regress after eradication of H pylori infection. However, longer follow-up is needed to clarify whether the remission is lasting.
    The Lancet 07/1995; 345(8965):1591-4. · 39.21 Impact Factor

Full-text (2 Sources)

Download
7 Downloads
Available from
Jun 6, 2014