Abstract
This paper investigates the capacity problem of heterogeneous wireless networks in mobility scenarios. A heterogeneous network model which consists of n normal nodes and m helping nodes is proposed. Moreover, we propose a D-delay transmission strategy to ensure that every packet can be delivered to its destination nodes with limited delay. Different from most existing network schemes, our network model has a novel two-tier architecture. The existence of helping nodes greatly improves the network capacity. Four types of mobile networks are studied in this paper: i.i.d. fast mobility model and slow mobility model in two-dimensional space, i.i.d. fast mobility model and slow mobility model in three-dimensional space. Using the virtual channel model, we present an intuitive analysis of the capacity of two-dimensional mobile networks and three-dimensional mobile networks, respectively. Given a delay constraint D, we derive the asymptotic expressions for the capacity of the four types of mobile networks. Furthermore, the impact of D and m to the capacity of the whole network is analyzed. Our findings provide great guidance for the future design of the next generation of networks.
Highlights
Network capacity is one of the key factors of wireless networks
We propose a new heterogeneous mobile network model, which consists of n mobile normal nodes and m stable helping nodes
Three-dimensional i.i.d. fast mobility model: It is with adelay constraint D
Summary
Network capacity is one of the key factors of wireless networks. The first study of network capacity is carried out by Gupta and Kumar in [1]. In [32], Toumpis and Goldsmith considered the case that the node mobility is much slower than the data transmissions In their network model, in single time slot, packets can be delivered by multi-hopc transmissions. In single time slot, packets can be delivered by multi-hopc transmissions They show that the delay-throughput tradeoff is Θ log n in their i.i.d. slow n mobility network model. Li et al [42] proposed a three-dimensional network model where the distributions of nodes are inhomogeneous They obtained the asymptotic expressions on the throughput capacity of their model. The network capacity can achieve constant order if the number of helping nodes is large enough, and in this case the time delay can be ensured. If D is not limited, the throughput can stay constant order, while the time delay can not be ensured
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
