Continuous Data Collection Capacity of Dual-Radio Multichannel Wireless Sensor Networks
The performance of data collection in Wireless Sensor Networks (WSNs) can be measured by network capacity. However, few existing works dedicatedly consider the Continuous Data Collection (CDC) capacity for WSNs under the protocol interference model. In this paper, we propose a multipath scheduling algorithm for SDC in single-radio multichannel WSNs and derive its network capacity which is a tighter lower bound compared with the previously best result [10]. We also propose a novel CDC method for dual-radio multichannel WSNs. It significantly speeds up the data collection process, and achieves a capacity of nW/12Minverted right perpendicular(3.63 rho(2)+c(3)rho+c(4))/Hinverted left perpendicular when Delta(e)   12, where n is the number of the sensors, M is a constant value and usually M << n, Delta(e) is the maximum number of the leaf nodes having a same parent in the data collection tree, W is the channel bandwidth, H is the number of available orthogonal channels, rho is the ratio of the interference radius over the transmission radius, c(3) = 8 pi/root 3 + pi + 2, and c(4) = 8 pi/root 3 + 2 pi + 6. Extensive simulation results indicate that the proposed algorithms improve network capacity significantly compared with existing works.
continuous data collection wireless sensor networks snapshot data collection capacity analysis