Proceedings of the 9th annual international conference on Mobile computing and networking
Impact of interference on multi-hop wireless network performance
Proceedings of the 9th annual international conference on Mobile computing and networking
ACM SIGCOMM Computer Communication Review
Routing in a delay tolerant network
Proceedings of the 2004 conference on Applications, technologies, architectures, and protocols for computer communications
End-to-end performance and fairness in multihop wireless backhaul networks
Proceedings of the 10th annual international conference on Mobile computing and networking
An overlay MAC layer for 802.11 networks
Proceedings of the 3rd international conference on Mobile systems, applications, and services
Understanding the real-world performance of carrier sense
Proceedings of the 2005 ACM SIGCOMM workshop on Experimental approaches to wireless network design and analysis
Architecture and evaluation of an unplanned 802.11b mesh network
Proceedings of the 11th annual international conference on Mobile computing and networking
Design and evaluation of a new MAC protocol for long-distance 802.11 mesh networks
Proceedings of the 11th annual international conference on Mobile computing and networking
Long-distance 802.11b links: performance measurements and experience
Proceedings of the 12th annual international conference on Mobile computing and networking
Efficient interference-aware TDMA link scheduling for static wireless networks
Proceedings of the 12th annual international conference on Mobile computing and networking
FRACTEL: a fresh perspective on (rural) mesh networks
Proceedings of the 2007 workshop on Networked systems for developing regions
Beyond pilots: keeping rural wireless networks alive
NSDI'08 Proceedings of the 5th USENIX Symposium on Networked Systems Design and Implementation
WiLdnet: design and implementation of high performancewifi based long distance networks
NSDI'07 Proceedings of the 4th USENIX conference on Networked systems design & implementation
Spatial reuse enhanced MAC for wireless dense networks
ICUFN'09 Proceedings of the first international conference on Ubiquitous and future networks
FD-MAC: a flow-driven MAC protocol for mobile ad hoc networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
A MAR-based QoS routing in long-distance wireless networks
Proceedings of the 6th International Wireless Communications and Mobile Computing Conference
JaldiMAC: taking the distance further
Proceedings of the 4th ACM Workshop on Networked Systems for Developing Regions
Using the wired internet as a control channel for residential wireless LANs
ACM SIGMOBILE Mobile Computing and Communications Review
Performance of a point-to-multipoint WiFi network in 400/700 MHz band
Proceedings of the 8th International Conference on Frontiers of Information Technology
CRMA: collision-resistant multiple access
MobiCom '11 Proceedings of the 17th annual international conference on Mobile computing and networking
Traffic-aware channel width adaptation in long-distance 802.11 mesh networks
Proceedings of the 15th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
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We consider the problem of efficientMAC design for long-distance WiFi-based mesh networks. In such networks it is common to find long propagation delays, the use of directional antennas, and the presence of inter-link interference. Prior work has shown that these characteristics make traditional CSMA-based MACs a poor choice for long-distance mesh networks and this finding has led to several recent research efforts exploring the use of TDMA-based approaches to media access. In this paper we first identify, and then address, several shortcomings of current TDMA-based proposals. First, because they use fixed-length transmission slots, current TDMA-based solutions do not adapt to dynamic variations in traffic load leading to inefficiencies in both throughput and delay. As we show in this paper, the throughput achieved by existing solutions falls far short of the optimal achievable network throughput. Finally, due to the scheduling constraints imposed by inter-link interference, current TDMA-based solutions only apply to bipartite network topologies. In this paper, we present JazzyMac, a simple, practical and efficient MAC protocol that addresses the above limitations. JazzyMac achieves efficiency by allowing variable-length link transmissions slots and then defining a distributed protocol by which nodes adapt the length of their transmission slots to changing traffic demands. JazzyMac is practical in that the adaptation at each node uses purely local information and that our protocol applies to arbitrary network topologies. Finally, the use of dynamic slot sizes allows JazzyMac to achieve better tradeoffs between throughput and delay. We evaluate JazzyMac using detailed simulation over a range of traffic patterns and realistic topologies. Our results show that JazzyMac improves throughput in all considered scenarios. This improvement is often substantial (e.g.,in 50% of our scenarios, throughput improves by over 40%) and is particularly pronounced for the common case of asymmetric traffic (e.g.,leading to almost 100% improvements). Furthermore, compared to current solutions, JazzyMac can achieve much better average delay for the same throughput.