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On the Connectivity and Multihop Delay of Ad Hoc Cognitive Radio Networks

On the Connectivity and Multihop Delay of Ad Hoc Cognitive Radio Networks,10.1109/JSAC.2011.110412,IEEE Journal on Selected Areas in Communications,We

On the Connectivity and Multihop Delay of Ad Hoc Cognitive Radio Networks   (Citations: 1)
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We analyze the multihop delay of ad hoc cognitive radio networks, where the transmission delay of each hop consists of the propagation delay and the waiting time for the availability of the communication channel (i.e., the occurrence of a spectrum opportunity at this hop). Using theories and techniques from continuum percolation and ergodicity, we establish the scaling law of the minimum multihop delay with respect to the source- destination distance in cognitive radio networks. When the prop- agation delay is negligible, we show the starkly different scaling behavior of the minimum multihop delay in instantaneously connected networks as compared to networks that are only intermittently connected due to scarcity of spectrum opportunities. Specifically, if the network is instantaneously connected, the minimum multihop delay is asymptotically independent of the distance; if the network is only intermittently connected, the minimum multihop delay scales linearly with the distance. When the propagation delay is nonnegligible but small, we show that although the scaling order is always linear, the scaling rate for an instantaneously connected network can be orders of magnitude smaller than the one for an intermittently connected network.
Journal: IEEE Journal on Selected Areas in Communications - JSAC , vol. 29, no. 4, pp. 805-818, 2011
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    • ...It is shown in [13] and [14] that when the primary network is static, this instantaneous connectivity is equivalent to the connectivity defined in terms of the finiteness of the minimum multihop delay (referred to as fd-connectivity); when the primary traffic has temporal dynamics (no matter how small the range of the dynamics is), this instantaneous connectivity is stronger than the fd-connectivity and the secondary network can be ...
    • ... this instantaneous connectivity is equivalent to the connectivity defined in terms of the finiteness of the minimum multihop delay (referred to as fd-connectivity); when the primary traffic has temporal dynamics (no matter how small the range of the dynamics is), this instantaneous connectivity is stronger than the fd-connectivity and the secondary network can be intermittently connected as long as it is topologically connected [13], [14]...
    • ...In [13] and [14], the impact of temporal dynamics of primary traffic on the connectivity and multihop delay of the secondary network is studied...

    Wei Renet al. Connectivity of Heterogeneous Wireless Networks

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