Energy-efficient collision-free medium access control for wireless sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
The flooding time synchronization protocol
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
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
Practical synchronization techniques for multi-channel MAC
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
Comparison of Multichannel MAC Protocols
IEEE Transactions on Mobile Computing
Brimon: a sensor network system for railway bridge monitoring
Proceedings of the 6th international conference on Mobile systems, applications, and services
Delay aware link scheduling for multi-hop TDMA wireless networks
IEEE/ACM Transactions on Networking (TON)
A new model for scheduling packet radio networks
INFOCOM'96 Proceedings of the Fifteenth annual joint conference of the IEEE computer and communications societies conference on The conference on computer communications - Volume 3
NSDR '11 Proceedings of the 5th ACM workshop on Networked systems for developing regions
A Dvaar to LokVaani: extending cellular coverage inside villages of developing world
Proceedings of the seventh ACM international workshop on Wireless network testbeds, experimental evaluation and characterization
Building a low cost low power wireless network to enable voice communication in developing regions
ACM SIGMOBILE Mobile Computing and Communications Review
Kyun queue: a sensor network system to monitor road traffic queues
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
Deployments made easy: essentials of managing a (rural) wireless mesh network
Proceedings of the 3rd ACM Symposium on Computing for Development
Distributed scheduling schemes for wireless mesh networks: A survey
ACM Computing Surveys (CSUR)
| Hi-index | 0.00 |
In this work, we consider the goal of enabling a local voice communication system, within a village, using a low cost and low power wireless mesh network. The design of an appropriate MAC is a major challenge in this context. Towards this goal, we present LiT: a full-fledged TDMA-based MAC protocol for real-time applications over such networks. We showcase the practicality of such a system through implementation-based evaluation of LiT on an inexpensive, low power 802.15.4 platform. While there is plentiful literature on the use of TDMA for wireless mesh networks, a practical multi-hop TDMA system remains elusive. In this regard, LiT addresses several practical concerns. It has built-in support for time-synchronization, has a flexible interface with routing, and has a dynamic TDMA schedule dissemination mechanism. LiT is multi-channel capable and is centrally controlled. It achieves robustness in the face of wireless packet errors by making extensive use of soft-state mechanisms. With appropriate duty cycling, LiT can make nodes run for several weeks without power off the grid. Evaluation of LiT on outdoor testbed shows quick flow setup (latency s), low packet delay (ms) and negligible data path jitter (median 0ms), essential for real-time applications.