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dc.contributor.authorYang, Wen-Hsinen_US
dc.contributor.authorWang, You-Chiunen_US
dc.contributor.authorTseng, Yu-Cheeen_US
dc.contributor.authorLin, Bao-Shuh Paulen_US
dc.date.accessioned2014-12-08T15:31:18Z-
dc.date.available2014-12-08T15:31:18Z-
dc.date.issued2013-07-01en_US
dc.identifier.issn1530-8669en_US
dc.identifier.urihttp://dx.doi.org/10.1002/wcm.1153en_US
dc.identifier.urihttp://hdl.handle.net/11536/22269-
dc.description.abstractRecently, digital video broadcasting-handheld (DVB-H) and IP datacast over DVB-H (DVB-IPDC) have been developed to support broadcasting services. DVB-H is designed to support digital video broadcast for handheld devices, whereas DVB-IPDC can integrate with an IP-relay network to complement the data loss problem in DVB-H. Assuming that WiMAX networks are adopted to support DVB-IPDC, this paper points out two critical problems: group packet loss (GPL) and broadcast data handover (BDH). GPL occurs when there is a burst of retransmission requests for the same pieces of data with high spatial or temporal correlation. BDH happens when some devices that made the above requests handover to new serving cells. To solve these problems, we propose lazy wait and group acknowledgement schemes to alleviate duplicate requests by exploiting their spatial and temporal correlations. This not only reduces the requests submitted by neighboring devices in both space and time domains but also avoids handovering devices from sending duplicate requests in new cells. Through mathematical analysis, we show how to adaptively adjust the timers of lazy wait and group acknowledgement based on channel quality. Simulation results prove that our schemes can efficiently reduce retransmission requests and retransmission packets, thus alleviating congestion in the IP-relay network. Copyright (c) 2011 John Wiley & Sons, Ltd.en_US
dc.language.isoen_USen_US
dc.subjectbroadcasten_US
dc.subjectdata recoveryen_US
dc.subjectDVBen_US
dc.subjectDVB-Hen_US
dc.subjectWiMAXen_US
dc.subjectwireless networken_US
dc.titleA request control scheme for data recovery in DVB-IPDC systems with spatial and temporal packet lossen_US
dc.typeArticleen_US
dc.identifier.doi10.1002/wcm.1153en_US
dc.identifier.journalWIRELESS COMMUNICATIONS & MOBILE COMPUTINGen_US
dc.citation.volume13en_US
dc.citation.issue10en_US
dc.citation.spage935en_US
dc.citation.epage950en_US
dc.contributor.department資訊工程學系zh_TW
dc.contributor.departmentDepartment of Computer Scienceen_US
dc.identifier.wosnumberWOS:000320399500005-
dc.citation.woscount1-
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