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dc.contributor.authorShen, Wei-Liangen_US
dc.contributor.authorLin, Kate Ching-Juen_US
dc.contributor.authorCheng, Wan-Jieen_US
dc.contributor.authorQiu, Lilien_US
dc.contributor.authorChen, Ming-Syanen_US
dc.date.accessioned2017-04-21T06:56:17Z-
dc.date.available2017-04-21T06:56:17Z-
dc.date.issued2016-12-01en_US
dc.identifier.issn1536-1233en_US
dc.identifier.urihttp://dx.doi.org/10.1109/TMC.2016.2533385en_US
dc.identifier.urihttp://hdl.handle.net/11536/132783-
dc.description.abstractWhile recent works on multiuser MIMO (MU-MIMO) mainly focus on boosting the throughput by enabling concurrent transmissions, less attention is paid to recovering concurrent erroneous streams. We however notice that uplink MU-MIMO is especially vulnerable to errors because error in any stream corrupts most of the other concurrent streams. Even worse, carrier sense and rate adaptation become more challenging in MU-MIMO, which further decreases reliability. Existing systems however recover errors by retransmitting all the streams in a corrupted packet, thereby taking away the significant performance benefit of MU-MIMO. To effectively harness the ideal gain of MU-MIMO, we develop Concurrent Packet Recovery (CPR), a recovery protocol customized for MU-MIMO. It has two distinctive features: (i) It judiciously selects the minimum number of streams to be retransmitted to support successful decoding; (ii) during retransmission, it utilizes the full degrees of freedom by allowing new streams to be sent in parallel. Our evaluation via testbed experiments and trace-driven simulations shows that CPR can efficiently recover both normal losses and collisions. For three-antenna AP scenarios, the throughput gain is up to 31.1 percent when no hidden terminal exists, and is 3.16x when 20 percent pairs of contending clients are hidden terminals.en_US
dc.language.isoen_USen_US
dc.subjectMultiuser MIMO networksen_US
dc.subjectpacket recoveryen_US
dc.titleConcurrent Packet Recovery for Distributed Uplink Multiuser MIMO Networksen_US
dc.identifier.doi10.1109/TMC.2016.2533385en_US
dc.identifier.journalIEEE TRANSACTIONS ON MOBILE COMPUTINGen_US
dc.citation.volume15en_US
dc.citation.issue12en_US
dc.citation.spage3014en_US
dc.citation.epage3027en_US
dc.contributor.department資訊工程學系zh_TW
dc.contributor.departmentDepartment of Computer Scienceen_US
dc.identifier.wosnumberWOS:000388113900007en_US
Appears in Collections:Articles