Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
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TY - GEN
T1 - DCCA: Differentiating Clear Channel Assessment for improved 802.11/802.15.4 coexistence
AU - King, Alex
AU - Brown, James
AU - Roedig, Utz
PY - 2014/10/1
Y1 - 2014/10/1
N2 - The interaction between devices sharing the same frequency domain, but using different communication protocols, is an important issue prevalent to the Internet of Things (IoT). IEEE 802.11 and IEEE 802.15.4, protocols that overlap in applications such as home automation, health care and factory automation, is one such example. In these situations 802.11 networks are known to detrimentally interfere with 802.15.4 networks, degrading performance significantly. We show that the response to unsuccessful Clear Channel Assessments (CCA) is a large contributor to this degradation. Current responses do not distinguish between different transmission sources, employing the same response independent of the interferer type. However, as we show in this paper, it is beneficial to discriminate interferer types when performing CCA as this allows us to employ different strategies in handling occupied media. Our work considers in particular the low-power Medium Access Control (MAC) protocols based on the 802.15.4 standard. In such protocols, CCA is applied at the transmitter to arbitrate channel access, and also at the receiver for power efficient transmission detection. We present a protocol building block called Differentiating Clear Channel Assessment (DCCA) which allows us to tailor the reaction to a busy channel depending on the nature of the interfering network type. We evaluate an implementation of DCCA for the ContikiMAC protocol on the Maxfor MTM-CM5000MSP platform. The experimental evaluation shows that DCCA improves throughput of 802.15.4 networks in the presence of 802.11 networks significantly, ten-fold in some settings.
AB - The interaction between devices sharing the same frequency domain, but using different communication protocols, is an important issue prevalent to the Internet of Things (IoT). IEEE 802.11 and IEEE 802.15.4, protocols that overlap in applications such as home automation, health care and factory automation, is one such example. In these situations 802.11 networks are known to detrimentally interfere with 802.15.4 networks, degrading performance significantly. We show that the response to unsuccessful Clear Channel Assessments (CCA) is a large contributor to this degradation. Current responses do not distinguish between different transmission sources, employing the same response independent of the interferer type. However, as we show in this paper, it is beneficial to discriminate interferer types when performing CCA as this allows us to employ different strategies in handling occupied media. Our work considers in particular the low-power Medium Access Control (MAC) protocols based on the 802.15.4 standard. In such protocols, CCA is applied at the transmitter to arbitrate channel access, and also at the receiver for power efficient transmission detection. We present a protocol building block called Differentiating Clear Channel Assessment (DCCA) which allows us to tailor the reaction to a busy channel depending on the nature of the interfering network type. We evaluate an implementation of DCCA for the ContikiMAC protocol on the Maxfor MTM-CM5000MSP platform. The experimental evaluation shows that DCCA improves throughput of 802.15.4 networks in the presence of 802.11 networks significantly, ten-fold in some settings.
KW - Internet of Things
KW - Zigbee
KW - access protocols
KW - radio receivers
KW - radio transmitters
KW - radiofrequency interference
KW - wireless LAN
KW - wireless channels
KW - CCA
KW - ContikiMAC protocol
KW - DCCA
KW - IEEE 802.11 networks
KW - IEEE 802.15.4, networks
KW - IoT
KW - Maxfor MTM- CM5000MSP platform
KW - communication protocols
KW - differentiating clear channel assessment
KW - frequency domain
KW - interfering network
KW - low-power medium access control
KW - power efficient transmission detection
KW - protocol building block
KW - receiver
KW - transmitter
KW - IEEE 802.11 Standards
KW - IEEE 802.15 Standards
KW - Interference
KW - Media Access Protocol
KW - Receivers
KW - Transceivers
KW - 802.15.4
KW - WiFi
KW - Wireless Sensor Networks
U2 - 10.1109/WiMOB.2014.6962148
DO - 10.1109/WiMOB.2014.6962148
M3 - Conference contribution/Paper
SP - 45
EP - 50
BT - 2014 IEEE 10th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)
PB - IEEE
ER -