Idle sense: an optimal access method for high throughput and fairness in rate diverse wireless LANs
Proceedings of the 2005 conference on Applications, technologies, architectures, and protocols for computer communications
Methods for restoring MAC layer fairness in IEEE 802.11 networks with physical layer capture
REALMAN '06 Proceedings of the 2nd international workshop on Multi-hop ad hoc networks: from theory to reality
MOJO: a distributed physical layer anomaly detection system for 802.11 WLANs
Proceedings of the 4th international conference on Mobile systems, applications and services
Performance Impact of Interlayer Dependence in Infrastructure WLANs
IEEE Transactions on Mobile Computing
Measurement-based models of delivery and interference in static wireless networks
Proceedings of the 2006 conference on Applications, technologies, architectures, and protocols for computer communications
Proceedings of the 9th ACM international symposium on Modeling analysis and simulation of wireless and mobile systems
Experimental study of concurrent transmission in wireless sensor networks
Proceedings of the 4th international conference on Embedded networked sensor systems
WNS2 '06 Proceeding from the 2006 workshop on ns-2: the IP network simulator
Automating cross-layer diagnosis of enterprise wireless networks
Proceedings of the 2007 conference on Applications, technologies, architectures, and protocols for computer communications
An experimental study on the capture effect in 802.11a networks
Proceedings of the second ACM international workshop on Wireless network testbeds, experimental evaluation and characterization
A general model of wireless interference
Proceedings of the 13th annual ACM international conference on Mobile computing and networking
Overhaul of ieee 802.11 modeling and simulation in ns-2
Proceedings of the 10th ACM Symposium on Modeling, analysis, and simulation of wireless and mobile systems
Location-Aware IEEE 802.11 for Spatial Reuse Enhancement
IEEE Transactions on Mobile Computing
Capture-aware staggering for concurrent transmissions
CoNEXT '07 Proceedings of the 2007 ACM CoNEXT conference
Multi-hop broadcast from theory to reality: practical design for ad hoc networks
Proceedings of the 1st international conference on Autonomic computing and communication systems
Performance of 802.11b/g in the interference limited regime
Computer Communications
Proceedings of the 14th ACM international conference on Mobile computing and networking
Revamping the IEEE 802.11a PHY simulation models
Proceedings of the 11th international symposium on Modeling, analysis and simulation of wireless and mobile systems
Understanding link-level 802.11 behavior: replacing convention with measurement
WICON '07 Proceedings of the 3rd international conference on Wireless internet
Proceedings of the 6th ACM conference on Embedded network sensor systems
Hashing Backoff: A Collision-Free Wireless Access Method
NETWORKING '09 Proceedings of the 8th International IFIP-TC 6 Networking Conference
Order matters: transmission reordering in wireless networks
Proceedings of the 15th annual international conference on Mobile computing and networking
TCP over Multi-Hop Wireless Networks: The Impact of MAC Level Interactions
ADHOC-NOW '09 Proceedings of the 8th International Conference on Ad-Hoc, Mobile and Wireless Networks
How do wireless chains behave?: the impact of MAC interactions
Proceedings of the 12th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
The availability and reliability of wireless multi-hop networks with stochastic link failures
IEEE Journal on Selected Areas in Communications - Special issue on stochastic geometry and random graphs for the analysis and designof wireless networks
Understanding interference and carrier sensing in wireless mesh networks
IEEE Communications Magazine
Methods for improving medium reuse in IEEE 802.11 networks
CCNC'09 Proceedings of the 6th IEEE Conference on Consumer Communications and Networking Conference
Characterizing 802.11 wireless link behavior
Wireless Networks
Improved modeling of IEEE 802.11a PHY through fine-grained measurements
Computer Networks: The International Journal of Computer and Telecommunications Networking
Performance evaluation of IEEE 802.11 DCF networks
ITC20'07 Proceedings of the 20th international teletraffic conference on Managing traffic performance in converged networks
Self-organization properties of CSMA/CA systems and their consequences on fairness
IEEE Transactions on Information Theory
Characterizing the capacity gain of stream control scheduling in MIMO wireless mesh networks
NETWORKING'07 Proceedings of the 6th international IFIP-TC6 conference on Ad Hoc and sensor networks, wireless networks, next generation internet
Cross layer multirate adaptation using physical capture
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Estimating link reliability in wireless networks: an empirical study and interference modeling
INFOCOM'10 Proceedings of the 29th conference on Information communications
Coupled 802.11 flows in urban channels: model and experimental evaluation
INFOCOM'10 Proceedings of the 29th conference on Information communications
Measuring transmission opportunities in 802.11 links
IEEE/ACM Transactions on Networking (TON)
IEEE/ACM Transactions on Networking (TON)
Opportunities of MIM capture in IEEE 802.11 WLANs: analytic study
Proceedings of the 5th International Conference on Ubiquitous Information Management and Communication
Partial interference and its performance impact on wireless multiple access networks
EURASIP Journal on Wireless Communications and Networking
An MIM-aware association control scheme for openflow access points in NOX architectures
Proceedings of the 6th International Conference on Future Internet Technologies
Fast track article: Comparing simulation tools and experimental testbeds for wireless mesh networks
Pervasive and Mobile Computing
WiFi-Nano: reclaiming WiFi efficiency through 800 ns slots
MobiCom '11 Proceedings of the 17th annual international conference on Mobile computing and networking
WiFi-NC: WiFi over narrow channels
NSDI'12 Proceedings of the 9th USENIX conference on Networked Systems Design and Implementation
Order matters: transmission reordering in wireless networks
IEEE/ACM Transactions on Networking (TON)
Max-min fairness in 802.11 mesh networks
IEEE/ACM Transactions on Networking (TON)
Efficient OFDM-based WLAN-multicast with feedback aggregation, power control and rate adaptation
Computer Communications
Coupled 802.11 flows in urban channels: model and experimental evaluation
IEEE/ACM Transactions on Networking (TON)
Physical layer capture aware MAC for WLANs
Wireless Networks
An empirical interference modeling for link reliability assessment in wireless networks
IEEE/ACM Transactions on Networking (TON)
Measurement-based simulation of WiFi interference
Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems
Modeling CSMA/CA network under asymmetric conditions
Proceedings of the 8th ACM workshop on Performance monitoring and measurement of heterogeneous wireless and wired networks
| Hi-index | 0.06 |
Physical layer capture (PLC) in 802.11b refers to the successful reception of the stronger (higher signal strength at receiver) frame in a collision. PLC causes significant imbalance in the throughputs of sources. Existing 802.11b simulators, including ns2 and Qualnet, assume that PLC occurs only if the stronger frame arrives first at the receiver. We show empirically that in reality PLC occurs even if the stronger frame arrives later (but within the physical layer preamble of the first frame). Consequently, throughput unfairness in reality can be significantly (up to 15%) higher than with the former PLC model. We have modified the ns2 simulator to account for this and Qualnet will be incorporating a fix in their next release. To identify which frames were involved in collisions, when their transmissions started, and which of them were retrieved, we have devised a novel technique using multiple sniffers and instrumented device drivers to reconstruct from the air interface all tx/rx events in a WLAN to within 4 驴s accuracy. This allows us to quantify the causal links from the PHY layer through the MAC layer to the observed application layer imbalance. It also shows that the arrival times of colliding frames routinely differ by as much as 20 驴s due to inherent uncertainties of 802.11b firmware clock synchronization and rx/tx turnaround delays, and that the frame to arrive first can be either the stronger or the weaker with equal likelihood.