Highly dense and highly dynamic Mobile Ad Hoc Networks (MANET) often have limited bandwidth available for the measurement and control of link performance parameters. Often, a receiving node can only measure and return link performance parameters to the transmitting node at a rate that constitutes a highly undersampled control loop with respect to the link dynamics encountered. Undersampling or the need for large control bandwidth to allow for adequate sampling is the bane of many MANET closed loop control methods. Open loop methods, where adjustments in transition parameters are made by the transmitting node based on receptions made in the opposite direction, suffer from bidirectional asymmetrical fading.
Accordingly, there is a need to exploit the synergistic relationship between Open and Closed loop link measurements. More particularly, there is a need to utilize the Closed Loop more in static environments where a lower update rate may be acceptable since the channel is not as dynamic and where static asymmetric fading can be compensated for via the closed loop. In dynamic channel conditions, the Open Loop may be favored since the asymmetrical fading can be filtered via low pass filtering and the more symmetrical link components compensated for, and where the Open Loop can provide lower latency in the link measurements with respect to the Closed Loop.
It would be desirable to provide a system and/or method that provides one or more of these or other advantageous features. Other features and advantages will be made apparent from the present specification. The teachings disclosed extend to those embodiments which fall within the scope of the appended claims, regardless of whether they accomplish one or more of the aforementioned needs.