Advanced Study on Capacity-Optimized Access Scheduling Control for Heterogeneous MANETs with MIMO Links

Multiple-input and multiple-output (MIMO) technique can signicantly improve transmission relia-
bility and bandwidth eciency in wireless networks. However, many upper layer aspects of MIMO
links, especially in mobile networks with heterogeneous antennas and strong interference environments,
need further investigation. In this paper, we study its impact on medium access and network
capacity. Since MIMO links can enhance physical layer capacity and co-channel interference suppre-
ssion that aects network access scheduling directly, we develop a capacity-optimized access schedul-
ing control (COASC) scheme for mobile ad hoc networks (MANETs) with MIMO links. We
formulate the distributed scheduling taking the key of optimization into design to improve the
network capacity and transmission reliability. Simulation results are presented to show the eective-
ness of the proposed scheme. A discrete stochastic approximation approach has been used to resolve
the interference issue in fully distributed environments. Simulation results show that MIMO links
have obviously impacts on the network capacity and COASC is an ecient strategy to exploit the
benet of MIMO links in MANETs.