In energy-constrained wireless networks, alternately sleeping is an effective way to reduce power consumption. However, this method may destroy the connectivity of network. Such a network is called the partially connected network. The numerical evaluation for the availability of partial connection is essential for wireless network running in periodically sleeping mode. In this paper, a computing model of partial connection availability based on alternate activity model is introduced. A node with packet to be send can hold the packet for certain period and resume packet forwarding when the sleeping next-hop node wakes up. Based on the Poisson process model and complete probability method, the formula of the partial connection availability is deduced. The formula can be very close to the actual capacity of the partially connected network in alternately sleeping mode. It is proved that compared with the full connection availability, within tolerable delay the partial connection availability is much higher. The theoretical criterion is provided in the process of deployment of energy-constrained wireless networks. Numerical analysis is conducted on the relationship among relevant network parameters and performance of networks such as packet delivery ratio and delay. Methods for setting the parameters are introduced. Simulation validates the methods and results.
|Number of pages||9|
|Journal||Jisuanji Xuebao/Chinese Journal of Computers|
|Publication status||Published - Apr 2007|
- Alternate activity
- Connection availability
- Full connection
- Partial connection