The myth of non-overlapping channels: interference measurements in IEEE 802.11 Export

@inproceedings{citeulike:1655753, abstract = {It has become a widely accepted assumption that multiple IEEE 802.11b/g transmissions in physical proximity can coexist without interfering each other. This is claimed to be the case when using separate channels with a minimum distance of 25 MHz, e.g. channel 1 and 6, which are often referred to as non-overlapping. In contrast we show that in practice cross-channel interference can be present also between non-overlapping channels if the interfering transmitter is in the proximity of the receiver. This phenomenon is known as the "near-far effect" in wireless communications. On IEEE 802.11 this has two main effects: frame corruption due to increased interference noise and channel blocking due to spurious carrier detection. The problem can be particularly serious when using IEEE 802.11 technology to build multi-hop mesh networks. Through an extensive set of experiments with off-the-shelf certified WiFi chipsets we demonstrate the presence and the detrimental effects of cross-channel interference between non-overlapping channels. We adopt an incremental approach: we first consider the case of unacknowledged broadcast packets, then we extend to regular UDP streams, finally we provide preliminary results for multi-hop TCP flows}, author = {Fuxjager, P. and Valerio, D. and Ricciato, F.}, booktitle = {Wireless on Demand Network Systems and Services, 2007. WONS '07. Fourth Annual Conference on}, citeulike-article-id = {1655753}, citeulike-linkout-0 = {http://dx.doi.org/10.1109/WONS.2007.340486}, citeulike-linkout-1 = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4142700}, day = {26}, doi = {10.1109/WONS.2007.340486}, journal = {Wireless on Demand Network Systems and Services, 2007. WONS '07. Fourth Annual Conference on}, keywords = {80211, channels, interference, myth, non-overlapping}, month = {January}, pages = {1--8}, posted-at = {2009-09-10 02:13:03}, priority = {2}, title = {The myth of non-overlapping channels: interference measurements in IEEE 802.11}, url = {http://dx.doi.org/10.1109/WONS.2007.340486}, year = {2007} }

TY - CONF ID - citeulike:1655753 L3 - citeulike-article-id:1655753 N2 - It has become a widely accepted assumption that multiple IEEE 802.11b/g transmissions in physical proximity can coexist without interfering each other. This is claimed to be the case when using separate channels with a minimum distance of 25 MHz, e.g. channel 1 and 6, which are often referred to as non-overlapping. In contrast we show that in practice cross-channel interference can be present also between non-overlapping channels if the interfering transmitter is in the proximity of the receiver. This phenomenon is known as the "near-far effect" in wireless communications. On IEEE 802.11 this has two main effects: frame corruption due to increased interference noise and channel blocking due to spurious carrier detection. The problem can be particularly serious when using IEEE 802.11 technology to build multi-hop mesh networks. Through an extensive set of experiments with off-the-shelf certified WiFi chipsets we demonstrate the presence and the detrimental effects of cross-channel interference between non-overlapping channels. We adopt an incremental approach: we first consider the case of unacknowledged broadcast packets, then we extend to regular UDP streams, finally we provide preliminary results for multi-hop TCP flows JF - Wireless on Demand Network Systems and Services, 2007. WONS '07. Fourth Annual Conference on EP - 8 TI - The myth of non-overlapping channels: interference measurements in IEEE 802.11 T2 - Wireless on Demand Network Systems and Services, 2007. WONS '07. Fourth Annual Conference on SP - 1 KW - 80211 KW - channels KW - interference KW - myth KW - non-overlapping AU - Fuxjager, P AU - Valerio, D AU - Ricciato, F PY - 2007/01/26/ UR - http://dx.doi.org/10.1109/WONS.2007.340486 ER -