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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Watteyne, T. Adjih, C. Vilajosana, X. |
| Copyright Year | 2015 |
| Description | Author affiliation: EVA Team, Inria, Paris, France (Watteyne, T.) || Univ. Oberta de Catalunya, Barcelona, Spain (Vilajosana, X.) || InFine team, Inria, Saclay, France (Adjih, C.) |
| Abstract | Time Synchronized Channel Hopping (TSCH) is a technique known to efficiently combat external interference and multi-path fading. TSCH is at the heart of industrial low-power wireless standards such as WirelessHART and IEEE802.15.4e, and the focus of the current standardization activities at IETF 6TiSCH. In a TSCH network, communicating nodes send successive link-layer frames at different frequencies. The performance of such frequency-agile communication is not well understood. In this paper, we propose an empirical approach. We conduct an experiment to record the connectivity between 350 nodes in a typical office environment, simultaneously on each of the 16 frequencies at 2.4 GHz. Analysis reveals the impact of WiFi interference on the reliability of the IEEE802.15.4 wireless links: even when the WiFi network sits idle, IEEE802.11 beaconing causes a significant number of links to drop from 90% to 70-80% packet delivery ratio. It also reveals the impact of multi-path fading, showing how moving a pair of nodes can cause their link to go from perfect to non-existing. Results show that the quality of each link depends heavily on the communication frequency. The paper shows the effectiveness of channel hopping: by simply changing the communication frequency between successive transmissions, less nodes are required to cover a geographical area. The paper discusses the importance of the frequency to retransmit on. The 5-hour connectivity trace reveals a wealth of information. This paper is only a first step towards a much larger dataset collected over a representative number of real-world deployments. |
| Starting Page | 145 |
| Ending Page | 150 |
| File Size | 1250230 |
| Page Count | 6 |
| File Format | |
| e-ISBN | 9781467381833 |
| DOI | 10.1109/CoASE.2015.7294053 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2015-08-24 |
| Publisher Place | Sweden |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | IEEE 802.11 Standard Interference Fading Wireless communication Reliability Packet loss |
| Content Type | Text |
| Resource Type | Article |
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