2008
DOI: 10.1117/12.766894
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Risk-aware scheduling for multi-user video streaming over wireless multi-hop networks

Abstract: To cope with the time-varying network conditions, various error-protection and channel adaptation strategies have been proposed at different layers of the protocol stack. However, these cross-layer strategies can be efficiently optimized only if they act on accurate information about the network conditions and hence, are able to timely adapt to network changes. We analyze the impact of such information feedback on the video quality performances of the collaborative multimedia users sharing the same multi-hop w… Show more

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Cited by 5 publications
(14 citation statements)
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“…One existing solution is the 802.11e hybrid coordinator function controlled channel access (HCCA) and enhanced distribution channel access [12]. A set of solutions employing crosslayering approaches at the lower layers depends on 802.11e at the link layer to reserve intervals of contention-free access to the medium [62,109,110,111]. In [112], 802.11e is combined with a dual-mode 802.11a/g scheme, where the link layer protocol alternates dynamically between 802.11a and 802.11g based on the range to the next hop.…”
Section: Lower Layer Techniquesmentioning
confidence: 99%
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“…One existing solution is the 802.11e hybrid coordinator function controlled channel access (HCCA) and enhanced distribution channel access [12]. A set of solutions employing crosslayering approaches at the lower layers depends on 802.11e at the link layer to reserve intervals of contention-free access to the medium [62,109,110,111]. In [112], 802.11e is combined with a dual-mode 802.11a/g scheme, where the link layer protocol alternates dynamically between 802.11a and 802.11g based on the range to the next hop.…”
Section: Lower Layer Techniquesmentioning
confidence: 99%
“…At the MAC layer, one can alter the MAC layer frame size according to the physical conditions to obtain an optimal compromise between the high delay of small frames and the high potential distortion of losing large video frames [113]. The retransmission limit may also be adapted to local signal to noise and interference ratio (SINR) conditions to avoid retransmitting frames that are past their delay deadline and thereby reduce unnecessary consumption of network resources [62,109,111]. One fundamental metric obtainable from the physical layer is SINR, which, as stated in [110], can be easily obtained through existing 802.11 WLAN standardized functions [108].…”
Section: Lower Layer Techniquesmentioning
confidence: 99%
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“…The authors in [29] studied the impact of inaccuracy in the fed back information about the network conditions when used in the scheduling strategy. They analyzed the impact of such inaccuracy on the video quality of the collaborative multimedia users that share the same multi-hop wireless network.…”
Section: Related Workmentioning
confidence: 99%