DMCA
Joint AMC and Packet Fragmentation for Error Control Over Fading Channels
| Citations: | 4 - 1 self |
BibTeX
@MISC{Zhang_jointamc,
author = {Ruonan Zhang and Student Member and Lin Cai},
title = {Joint AMC and Packet Fragmentation for Error Control Over Fading Channels},
year = {}
}
Share
 |
 |
 |
 |
||
OpenURL
Abstract
Abstract—Error control is critical for wireless networks to combat channel fading and ensure efficient resource utilization. Adaptive modulation and coding (AMC) in the physical (PHY) layer and packet fragmentation and automatic repeat request (ARQ) in the link layer are widely used error-control mechanisms. However, how to jointly optimize them in both layers for high-rate wireless networks is still open. In this paper, using the WiMedia ultrawideband (UWB) networks as an example, we first develop a general analytical framework to quantify the link delay and loss performance considering the channel fading, the joint errorcontrol mechanisms, and the arbitrary reservation-based media access control (MAC) protocol. Second, we introduce a cross-layer design to optimize the PHY-layer AMC and the link-layer packet fragmentation and propose a joint-adaptation mechanism that is simple to implement and has near-optimal performance. Numerical results reveal that fragmentation has a greater impact than AMC on the delay and loss performance for marginal links and that the proposed joint-adaptation strategy is efficient for high-rate wireless networks. Index Terms—Adaptive modulation and coding, automatic repeat request, error control, fading channels, packet fragmentation, queueing analysis, reservation-based medium access control. I.
Keyphrases
packet fragmentation joint amc error control fading channel high-rate wireless network loss performance automatic repeat request channel fading arbitrary reservation-based medium access control numerical result joint-adaptation mechanism link delay cross-layer design near-optimal performance efficient resource utilization abstract error control link-layer packet fragmentation general analytical framework marginal link wireless network index term joint errorcontrol mechanism joint-adaptation strategy reservation-based medium access control phy-layer amc error control error-control mechanism adaptive modulation wimedia ultrawideband link layer
