Data Transmission with Reduced Delay for Distributed Acoustic Sensors

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This paper proposes a channel access control scheme fit to dense acoustic sensor nodes in a sensor network, where multiple acoustic sensor nodes within communication range of a cluster head are grouped into clusters. Acoustic sensor nodes in a cluster detect acoustic signals and convert them into electric signals (packets). Detection by acoustic sensors can be executed periodically or randomly. As a result, each acoustic sensor generates its packets (50 bytes each) periodically or randomly over short time intervals (400ms similar to 4 seconds) and transmits directly to a cluster head (coordinator node). Our approach proposes using a slotted carrier sense multiple access. All acoustic sensor nodes in a cluster are allocated to time slots and the number of allocated sensor nodes to each time slot is uniform. All sensor nodes allocated to a time slot listen for packet transmission from the beginning of the time slot for a duration proportional to their priority. The order of packet transmissions with the acoustic sensor nodes in the time slot is autonomously adjusted according to the history of packet transmissions in the time slot. In simulations, performances of the proposed scheme are demonstrated by the comparisons with other low rate wireless channel access schemes.
Publisher
HINDAWI PUBLISHING CORP
Issue Date
2015
Language
English
Article Type
Article
Keywords

COGNITIVE RADIO NETWORKS

Citation

INTERNATIONAL JOURNAL OF DISTRIBUTED SENSOR NETWORKS

ISSN
1550-1329
DOI
10.1155/2015/247612
URI
http://hdl.handle.net/10203/207561
Appears in Collection
GT-Journal Papers(저널논문)
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